Adding upstream version 115.7.0esr.upstream/115.7.0esr upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
author: Daniel Baumann <daniel.baumann@progress-linux.org> 2024-04-07 19:33:14 +0000
committer: Daniel Baumann <daniel.baumann@progress-linux.org> 2024-04-07 19:33:14 +0000
commit: 36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree: 105e8c98ddea1c1e4784a60a5a6410fa416be2de /third_party/rust/metal
parent: Initial commit. (diff)
download: firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz
firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip
67 files changed, 13452 insertions, 0 deletions
diff --git a/third_party/rust/metal/.cargo-checksum.json b/third_party/rust/metal/.cargo-checksum.json
new file mode 100644
index 0000000000..9bc06c85d0
--- /dev/null
+++ b/third_party/rust/metal/.cargo-checksum.json
@@ -0,0 +1 @@
+{"files":{"Cargo.lock":"52f1dbe7e210e54f2e5a580f0119bf73357efd9ae2cfe13ecc5d97d10e383072","Cargo.toml":"90d4cc28d3a0aaae093de4a76b09c83cdac808f626e74dcd2b59a68785becff1","LICENSE-APACHE":"a60eea817514531668d7e00765731449fe14d059d3249e0bc93b36de45f759f2","LICENSE-MIT":"0621878e61f0d0fda054bcbe02df75192c28bde1ecc8289cbd86aeba2dd72720","Makefile":"6fddc61a94f5b31a65b11c1bef8b19c92bff738716998076c5d49c2834223c75","README.md":"6817e12da257b43352f71f595dcc713adf117c734ebf656e6af2d7d04be27cd6","bors.toml":"c2733ec512a08bf76b6a1ed77270810a0edeb888ba24c2a75679e1eb1bd563a5","examples/argument-buffer/main.rs":"a087db6648a4b092520de29616521c704d892e0d3ace935d16f3f339415c4361","examples/bind/main.rs":"a0c85aad05f08666f9b380a7146a8473a6a6fe0db5d523760373093a0af20e5f","examples/bindless/main.rs":"0aaad9e42634c1ea204342a76c1bfe80c8fcf9d3ebe8247846cf63ecb08fb0d5","examples/caps/main.rs":"b7be00c1cc9042140d34ea05051152a7035f316f0bdcd31ac5a660a97e0c4f70","examples/circle/README.md":"e1c97cf5252f0d1f2934ace78b5d839c5f45911f3007dbd2925eeceefb8f0af6","examples/circle/main.rs":"91d80c85a358400ceeddf1ab108a7e1052dd208c4ec72cde925d02284d3cf9d4","examples/circle/screenshot.png":"97bf07c85bf02367447b9c8a81707c124e4a3b420fa386b95ba08b21938f4f2a","examples/circle/shaders.metal":"5e4f40efca5bb386204a09e1b983cc6c634fdf1ca9dd4974227313adbf50e8b5","examples/circle/shaders.metallib":"666a9491d795ef9c0b9c122c7ada571cc2c0e8774d2d89e5b4b996f3dc47962b","examples/compute/compute-argument-buffer.metal":"6530bbd6a0101d9db2893805436f5dc877959e81ea97a27014c0fc52fc9fa77b","examples/compute/compute-argument-buffer.rs":"e3de61fd7cc2f14d9d52300e4878601dbc072bc26d9dafc66115df58f94e0470","examples/compute/embedded-lib.rs":"55f701810fa5270c27ca771e713f9f8cf09e124a997b0b03790b38435593a7ea","examples/compute/main.rs":"f16cbf57cd27dc948ff651251ce26e6bd616cb5d989b8dadb4256c73a9bfba4b","examples/compute/shaders.metal":"f2b15551bb5247b88a3029c3d8ef37c6fa04a4a6cca9f90f069894ed6822b4bf","examples/compute/shaders.metallib":"fef91643e60c0ec99ad2bd2f3916299bcc3e6a80038ea27bed59681badfea7d1","examples/events/main.rs":"9cb35381b0a3918bd7d530171de8f7cceafe3d4851c0f430b4aff1f5c2aae749","examples/fence/main.rs":"47741327e62db1d8bd344b6a9ec26ef13ffb0b56b0dd7077c5d926d43faaeff7","examples/headless-render/README.md":"b1c97b52701cfb41fc0b9e269ba7a7a454d9161746198e2f5789f2636f60842d","examples/headless-render/main.rs":"cf0180839e8d09d4bf403ae947365ac18fa17782172986311bfa04b84f88169e","examples/headless-render/screenshot.png":"01d6ea5791b63b0f01190198756446cf313fc25dc64d0138c1b4f62c9f862dd1","examples/library/main.rs":"a1420ec28a471f28a789b75b3ecf5abb699ed352b337747169914812fb98045a","examples/mps/main.rs":"51f34582bf118f171bbb81d22c11407c7a35f381dbbff2d75c6f8e90d22a2aa1","examples/mps/shaders.metal":"155922d6a4184078ae7ee29504a268e1218f07d908f921eef60e5bfa8a793bda","examples/mps/shaders.metallib":"b62451223549b1e7eb90ec3d3534c0ed4cdfdc581c7df3ffcdc4786a5fcacde4","examples/reflection/main.rs":"01b0cd95558b8c3e547b239a1b2ae7e882ab0f52346f96bcefd2e9616693a98c","examples/shader-dylib/main.rs":"d29ab2105131b8c56a6af6453f1d973e2bda5564f84b652c01e4a4e44b7a70f2","examples/shader-dylib/test_dylib.metal":"3469de785c2c0da784e84758fc0da5a81e474ca15588485d9e04398690641cc8","examples/shader-dylib/test_shader.metal":"1a04ff8ab3288b09d14cd35440b2557e92ddedbff9d07c4144a22e9062e6e1e4","examples/window/README.md":"69655cff298e07887fe70e8a13e27d8a87efcd0cc0da4e15485134e064e1aceb","examples/window/main.rs":"09c508013223de859f33fb69410bde30e8d7f04952850504d8b1f8faf7049b1b","examples/window/screenshot.png":"da7369d7cc297c7f7f6bd773c93e7d708d72442c9c5ff5a20c2f2ee6852552dc","examples/window/shaders.metal":"90dee6c752add5c617dfdca93064b2824b44ff8c01ef63986826f6a1531e95d6","examples/window/shaders.metallib":"16fa82beb70bf16c3501970cae0d5028a747a08164337161dc9c2e8965d4c366","src/argument.rs":"578ca587dfb034a7e8e4551fd93164a86595a4637e5656fc6cc429ae2de6cda2","src/buffer.rs":"80c55c8703340bf0d4d1b5eface518fdf82355ccb897883639cbf7e4933a4344","src/capturedescriptor.rs":"7d90b1e7b87fa9da1e38bba9637cd8d7a18a81f8c3f408149058ed4ea20a6894","src/capturemanager.rs":"bdee9e170da371778452513a9ac363a738ea8bfd3f0870d86c6013459c5af010","src/commandbuffer.rs":"8636043739fb9ea44f443ef315fadfa13675d04827e5fac42abcde0b2c612a0c","src/commandqueue.rs":"5b87621ae4495ae04a5de5ce980d0cde31b4bb0d1e31e932d34c49252240c9d9","src/constants.rs":"d9bea9cb01892f40fb635cef5ca247023c1998b47b33cc5ce39696fac634383b","src/depthstencil.rs":"5bfa4f49940fdc9d12b2af08f7fe710c41f0b7e26bdb6f8709fe17b9a9d7d5eb","src/device.rs":"1af6bc1c60981c60d102338bb9618c3a6bb215994501a64c31997dd1e7976377","src/drawable.rs":"aea0759dc9de002c660e938319dfdfd3e4e82add30ed626ea31e3270698f4b85","src/encoder.rs":"2d0f402f1b286459a7c3b0dbbc640a81a7e3f6698f7ca7a78f5bfa09e9b633e9","src/heap.rs":"fcbb7dfaafb1008fadd75fb2b394776c9843fe98a266e237d7a7b4d80e046b06","src/indirect_encoder.rs":"c61c610ac4607a6b76c551becb88e054c9754b5cc31b144e4b6f26202e6294f7","src/lib.rs":"a297e4d0f831d82bc6fe53ed0692b8d06ac43420e257b26f5ea69a03a459c505","src/library.rs":"985bb5833b55f054b932df425932574d6c65ee2ed11b5e1ccd5a2e279c52d54c","src/mps.rs":"b415be3221754d836fd535f4b5b45ed484d4cc926bd26145e82a9e61d337da4c","src/pipeline/compute.rs":"e4bed01671a466ed460fbc9059ac72dab7cb123a964de63058f0e5aafdc5e2a0","src/pipeline/mod.rs":"5ec3cb524cc03202a3394dad5a7d0b733474f664935353253e76a49aed5513ad","src/pipeline/render.rs":"6738931629f1944d69815622a9f3281e55df0e56dc87d3cdb885cc8c7e2c8820","src/renderpass.rs":"666ca2a35d2bb96564f105a87f03cfbf87d3fd10e6915e473e8ff4c0db49fdef","src/resource.rs":"9753cc15c5d0064e954717c61feb902c218141b1b0e77bce4f9d0653b6d4589b","src/sampler.rs":"adabef3520a18c829bfd9b705897873d9adc37ebe88cfa6864154483dd858b9d","src/sync.rs":"a2c081984630634134b17007a6ff7a016e2aa9070bc46754d3e82500fc25eb53","src/texture.rs":"773bb005cb17c17b4e0138e328fcbeef37d437032406521f874527782d842ef6","src/types.rs":"5a754c8036ff4ab1ec41d01af5fba64f3085f2a9dd1d15d00e907e40b85cf163","src/vertexdescriptor.rs":"5874f54bcc5613adff613ed3e2bb08870b1115ef6d369b21612ce848796b005e"},"package":"de11355d1f6781482d027a3b4d4de7825dcedb197bf573e0596d00008402d060"}
+\ No newline at end of file
diff --git a/third_party/rust/metal/Cargo.lock b/third_party/rust/metal/Cargo.lock
new file mode 100644
index 0000000000..829c3a2b72
--- /dev/null
+++ b/third_party/rust/metal/Cargo.lock
@@ -0,0 +1,1242 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "ab_glyph_rasterizer"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a13739d7177fbd22bb0ed28badfff9f372f8bef46c863db4e1c6248f6b223b6e"
+
+[[package]]
+name = "adler32"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aae1277d39aeec15cb388266ecc24b11c80469deae6067e17a1a7aa9e5c1f234"
+
+[[package]]
+name = "andrew"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8c4afb09dd642feec8408e33f92f3ffc4052946f6b20f32fb99c1f58cd4fa7cf"
+dependencies = [
+ "bitflags",
+ "rusttype",
+ "walkdir",
+ "xdg",
+ "xml-rs",
+]
+
+[[package]]
+name = "autocfg"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+
+[[package]]
+name = "bitflags"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+
+[[package]]
+name = "block"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0d8c1fef690941d3e7788d328517591fecc684c084084702d6ff1641e993699a"
+
+[[package]]
+name = "byteorder"
+version = "1.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"
+
+[[package]]
+name = "calloop"
+version = "0.6.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b036167e76041694579972c28cf4877b4f92da222560ddb49008937b6a6727c"
+dependencies = [
+ "log",
+ "nix 0.18.0",
+]
+
+[[package]]
+name = "cc"
+version = "1.0.73"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2fff2a6927b3bb87f9595d67196a70493f627687a71d87a0d692242c33f58c11"
+
+[[package]]
+name = "cfg-if"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "cocoa"
+version = "0.24.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6f63902e9223530efb4e26ccd0cf55ec30d592d3b42e21a28defc42a9586e832"
+dependencies = [
+ "bitflags",
+ "block",
+ "cocoa-foundation",
+ "core-foundation 0.9.3",
+ "core-graphics 0.22.3",
+ "foreign-types",
+ "libc 0.2.126",
+ "objc",
+]
+
+[[package]]
+name = "cocoa-foundation"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7ade49b65d560ca58c403a479bb396592b155c0185eada742ee323d1d68d6318"
+dependencies = [
+ "bitflags",
+ "block",
+ "core-foundation 0.9.3",
+ "core-graphics-types",
+ "foreign-types",
+ "libc 0.2.126",
+ "objc",
+]
+
+[[package]]
+name = "core-foundation"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "57d24c7a13c43e870e37c1556b74555437870a04514f7685f5b354e090567171"
+dependencies = [
+ "core-foundation-sys 0.7.0",
+ "libc 0.2.126",
+]
+
+[[package]]
+name = "core-foundation"
+version = "0.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "194a7a9e6de53fa55116934067c844d9d749312f75c6f6d0980e8c252f8c2146"
+dependencies = [
+ "core-foundation-sys 0.8.3",
+ "libc 0.2.126",
+]
+
+[[package]]
+name = "core-foundation-sys"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b3a71ab494c0b5b860bdc8407ae08978052417070c2ced38573a9157ad75b8ac"
+
+[[package]]
+name = "core-foundation-sys"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5827cebf4670468b8772dd191856768aedcb1b0278a04f989f7766351917b9dc"
+
+[[package]]
+name = "core-graphics"
+version = "0.19.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b3889374e6ea6ab25dba90bb5d96202f61108058361f6dc72e8b03e6f8bbe923"
+dependencies = [
+ "bitflags",
+ "core-foundation 0.7.0",
+ "foreign-types",
+ "libc 0.2.126",
+]
+
+[[package]]
+name = "core-graphics"
+version = "0.22.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2581bbab3b8ffc6fcbd550bf46c355135d16e9ff2a6ea032ad6b9bf1d7efe4fb"
+dependencies = [
+ "bitflags",
+ "core-foundation 0.9.3",
+ "core-graphics-types",
+ "foreign-types",
+ "libc 0.2.126",
+]
+
+[[package]]
+name = "core-graphics-types"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3a68b68b3446082644c91ac778bf50cd4104bfb002b5a6a7c44cca5a2c70788b"
+dependencies = [
+ "bitflags",
+ "core-foundation 0.9.3",
+ "foreign-types",
+ "libc 0.2.126",
+]
+
+[[package]]
+name = "core-video-sys"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34ecad23610ad9757664d644e369246edde1803fcb43ed72876565098a5d3828"
+dependencies = [
+ "cfg-if 0.1.10",
+ "core-foundation-sys 0.7.0",
+ "core-graphics 0.19.2",
+ "libc 0.2.126",
+ "objc",
+]
+
+[[package]]
+name = "crc32fast"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b540bd8bc810d3885c6ea91e2018302f68baba2129ab3e88f32389ee9370880d"
+dependencies = [
+ "cfg-if 1.0.0",
+]
+
+[[package]]
+name = "cty"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b365fabc795046672053e29c954733ec3b05e4be654ab130fe8f1f94d7051f35"
+
+[[package]]
+name = "darling"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0d706e75d87e35569db781a9b5e2416cff1236a47ed380831f959382ccd5f858"
+dependencies = [
+ "darling_core",
+ "darling_macro",
+]
+
+[[package]]
+name = "darling_core"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f0c960ae2da4de88a91b2d920c2a7233b400bc33cb28453a2987822d8392519b"
+dependencies = [
+ "fnv",
+ "ident_case",
+ "proc-macro2",
+ "quote",
+ "strsim",
+ "syn",
+]
+
+[[package]]
+name = "darling_macro"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9b5a2f4ac4969822c62224815d069952656cadc7084fdca9751e6d959189b72"
+dependencies = [
+ "darling_core",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "deflate"
+version = "0.8.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73770f8e1fe7d64df17ca66ad28994a0a623ea497fa69486e14984e715c5d174"
+dependencies = [
+ "adler32",
+ "byteorder",
+]
+
+[[package]]
+name = "derivative"
+version = "2.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fcc3dd5e9e9c0b295d6e1e4d811fb6f157d5ffd784b8d202fc62eac8035a770b"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "dirs"
+version = "4.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ca3aa72a6f96ea37bbc5aa912f6788242832f75369bdfdadcb0e38423f100059"
+dependencies = [
+ "dirs-sys",
+]
+
+[[package]]
+name = "dirs-sys"
+version = "0.3.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b1d1d91c932ef41c0f2663aa8b0ca0342d444d842c06914aa0a7e352d0bada6"
+dependencies = [
+ "libc 0.2.126",
+ "redox_users",
+ "winapi 0.3.9",
+]
+
+[[package]]
+name = "dispatch"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bd0c93bb4b0c6d9b77f4435b0ae98c24d17f1c45b2ff844c6151a07256ca923b"
+
+[[package]]
+name = "dlib"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b11f15d1e3268f140f68d390637d5e76d849782d971ae7063e0da69fe9709a76"
+dependencies = [
+ "libloading 0.6.7",
+]
+
+[[package]]
+name = "dlib"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac1b7517328c04c2aa68422fc60a41b92208182142ed04a25879c26c8f878794"
+dependencies = [
+ "libloading 0.7.3",
+]
+
+[[package]]
+name = "downcast-rs"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ea835d29036a4087793836fa931b08837ad5e957da9e23886b29586fb9b6650"
+
+[[package]]
+name = "fnv"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
+
+[[package]]
+name = "foreign-types"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f6f339eb8adc052cd2ca78910fda869aefa38d22d5cb648e6485e4d3fc06f3b1"
+dependencies = [
+ "foreign-types-shared",
+]
+
+[[package]]
+name = "foreign-types-shared"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "00b0228411908ca8685dba7fc2cdd70ec9990a6e753e89b6ac91a84c40fbaf4b"
+
+[[package]]
+name = "fuchsia-cprng"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a06f77d526c1a601b7c4cdd98f54b5eaabffc14d5f2f0296febdc7f357c6d3ba"
+
+[[package]]
+name = "fuchsia-zircon"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2e9763c69ebaae630ba35f74888db465e49e259ba1bc0eda7d06f4a067615d82"
+dependencies = [
+ "bitflags",
+ "fuchsia-zircon-sys",
+]
+
+[[package]]
+name = "fuchsia-zircon-sys"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3dcaa9ae7725d12cdb85b3ad99a434db70b468c09ded17e012d86b5c1010f7a7"
+
+[[package]]
+name = "getrandom"
+version = "0.2.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4eb1a864a501629691edf6c15a593b7a51eebaa1e8468e9ddc623de7c9b58ec6"
+dependencies = [
+ "cfg-if 1.0.0",
+ "libc 0.2.126",
+ "wasi 0.11.0+wasi-snapshot-preview1",
+]
+
+[[package]]
+name = "ident_case"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b9e0384b61958566e926dc50660321d12159025e767c18e043daf26b70104c39"
+
+[[package]]
+name = "instant"
+version = "0.1.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a5bbe824c507c5da5956355e86a746d82e0e1464f65d862cc5e71da70e94b2c"
+dependencies = [
+ "cfg-if 1.0.0",
+]
+
+[[package]]
+name = "iovec"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2b3ea6ff95e175473f8ffe6a7eb7c00d054240321b84c57051175fe3c1e075e"
+dependencies = [
+ "libc 0.2.126",
+]
+
+[[package]]
+name = "jni-sys"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8eaf4bc02d17cbdd7ff4c7438cafcdf7fb9a4613313ad11b4f8fefe7d3fa0130"
+
+[[package]]
+name = "kernel32-sys"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
+dependencies = [
+ "winapi 0.2.8",
+ "winapi-build",
+]
+
+[[package]]
+name = "lazy_static"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
+
+[[package]]
+name = "lazycell"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "830d08ce1d1d941e6b30645f1a0eb5643013d835ce3779a5fc208261dbe10f55"
+
+[[package]]
+name = "libc"
+version = "0.1.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e32a70cf75e5846d53a673923498228bbec6a8624708a9ea5645f075d6276122"
+
+[[package]]
+name = "libc"
+version = "0.2.126"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "349d5a591cd28b49e1d1037471617a32ddcda5731b99419008085f72d5a53836"
+
+[[package]]
+name = "libloading"
+version = "0.6.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "351a32417a12d5f7e82c368a66781e307834dae04c6ce0cd4456d52989229883"
+dependencies = [
+ "cfg-if 1.0.0",
+ "winapi 0.3.9",
+]
+
+[[package]]
+name = "libloading"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "efbc0f03f9a775e9f6aed295c6a1ba2253c5757a9e03d55c6caa46a681abcddd"
+dependencies = [
+ "cfg-if 1.0.0",
+ "winapi 0.3.9",
+]
+
+[[package]]
+name = "lock_api"
+version = "0.4.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "327fa5b6a6940e4699ec49a9beae1ea4845c6bab9314e4f84ac68742139d8c53"
+dependencies = [
+ "autocfg",
+ "scopeguard",
+]
+
+[[package]]
+name = "log"
+version = "0.4.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "abb12e687cfb44aa40f41fc3978ef76448f9b6038cad6aef4259d3c095a2382e"
+dependencies = [
+ "cfg-if 1.0.0",
+]
+
+[[package]]
+name = "malloc_buf"
+version = "0.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "62bb907fe88d54d8d9ce32a3cceab4218ed2f6b7d35617cafe9adf84e43919cb"
+dependencies = [
+ "libc 0.2.126",
+]
+
+[[package]]
+name = "memchr"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
+
+[[package]]
+name = "memmap2"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9b70ca2a6103ac8b665dc150b142ef0e4e89df640c9e6cf295d189c3caebe5a"
+dependencies = [
+ "libc 0.2.126",
+]
+
+[[package]]
+name = "metal"
+version = "0.24.0"
+dependencies = [
+ "bitflags",
+ "block",
+ "cocoa",
+ "core-graphics-types",
+ "cty",
+ "dispatch",
+ "foreign-types",
+ "log",
+ "objc",
+ "png",
+ "sema",
+ "winit",
+]
+
+[[package]]
+name = "minimal-lexical"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
+
+[[package]]
+name = "miniz_oxide"
+version = "0.3.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "791daaae1ed6889560f8c4359194f56648355540573244a5448a83ba1ecc7435"
+dependencies = [
+ "adler32",
+]
+
+[[package]]
+name = "mio"
+version = "0.6.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4afd66f5b91bf2a3bc13fad0e21caedac168ca4c707504e75585648ae80e4cc4"
+dependencies = [
+ "cfg-if 0.1.10",
+ "fuchsia-zircon",
+ "fuchsia-zircon-sys",
+ "iovec",
+ "kernel32-sys",
+ "libc 0.2.126",
+ "log",
+ "miow",
+ "net2",
+ "slab",
+ "winapi 0.2.8",
+]
+
+[[package]]
+name = "mio-extras"
+version = "2.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "52403fe290012ce777c4626790c8951324a2b9e3316b3143779c72b029742f19"
+dependencies = [
+ "lazycell",
+ "log",
+ "mio",
+ "slab",
+]
+
+[[package]]
+name = "miow"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ebd808424166322d4a38da87083bfddd3ac4c131334ed55856112eb06d46944d"
+dependencies = [
+ "kernel32-sys",
+ "net2",
+ "winapi 0.2.8",
+ "ws2_32-sys",
+]
+
+[[package]]
+name = "ndk"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5eb167c1febed0a496639034d0c76b3b74263636045db5489eee52143c246e73"
+dependencies = [
+ "jni-sys",
+ "ndk-sys",
+ "num_enum",
+ "thiserror",
+]
+
+[[package]]
+name = "ndk-glue"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bdf399b8b7a39c6fb153c4ec32c72fd5fe789df24a647f229c239aa7adb15241"
+dependencies = [
+ "lazy_static",
+ "libc 0.2.126",
+ "log",
+ "ndk",
+ "ndk-macro",
+ "ndk-sys",
+]
+
+[[package]]
+name = "ndk-macro"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05d1c6307dc424d0f65b9b06e94f88248e6305726b14729fd67a5e47b2dc481d"
+dependencies = [
+ "darling",
+ "proc-macro-crate",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "ndk-sys"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e1bcdd74c20ad5d95aacd60ef9ba40fdf77f767051040541df557b7a9b2a2121"
+
+[[package]]
+name = "net2"
+version = "0.2.37"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "391630d12b68002ae1e25e8f974306474966550ad82dac6886fb8910c19568ae"
+dependencies = [
+ "cfg-if 0.1.10",
+ "libc 0.2.126",
+ "winapi 0.3.9",
+]
+
+[[package]]
+name = "nix"
+version = "0.18.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "83450fe6a6142ddd95fb064b746083fc4ef1705fe81f64a64e1d4b39f54a1055"
+dependencies = [
+ "bitflags",
+ "cc",
+ "cfg-if 0.1.10",
+ "libc 0.2.126",
+]
+
+[[package]]
+name = "nix"
+version = "0.20.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fa9b4819da1bc61c0ea48b63b7bc8604064dd43013e7cc325df098d49cd7c18a"
+dependencies = [
+ "bitflags",
+ "cc",
+ "cfg-if 1.0.0",
+ "libc 0.2.126",
+]
+
+[[package]]
+name = "nom"
+version = "7.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a8903e5a29a317527874d0402f867152a3d21c908bb0b933e416c65e301d4c36"
+dependencies = [
+ "memchr",
+ "minimal-lexical",
+]
+
+[[package]]
+name = "num_enum"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ca565a7df06f3d4b485494f25ba05da1435950f4dc263440eda7a6fa9b8e36e4"
+dependencies = [
+ "derivative",
+ "num_enum_derive",
+]
+
+[[package]]
+name = "num_enum_derive"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ffa5a33ddddfee04c0283a7653987d634e880347e96b5b2ed64de07efb59db9d"
+dependencies = [
+ "proc-macro-crate",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "objc"
+version = "0.2.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "915b1b472bc21c53464d6c8461c9d3af805ba1ef837e1cac254428f4a77177b1"
+dependencies = [
+ "malloc_buf",
+ "objc_exception",
+]
+
+[[package]]
+name = "objc_exception"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ad970fb455818ad6cba4c122ad012fae53ae8b4795f86378bce65e4f6bab2ca4"
+dependencies = [
+ "cc",
+]
+
+[[package]]
+name = "once_cell"
+version = "1.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7709cef83f0c1f58f666e746a08b21e0085f7440fa6a29cc194d68aac97a4225"
+
+[[package]]
+name = "owned_ttf_parser"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9f923fb806c46266c02ab4a5b239735c144bdeda724a50ed058e5226f594cde3"
+dependencies = [
+ "ttf-parser",
+]
+
+[[package]]
+name = "parking_lot"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7d17b78036a60663b797adeaee46f5c9dfebb86948d1255007a1d6be0271ff99"
+dependencies = [
+ "instant",
+ "lock_api",
+ "parking_lot_core",
+]
+
+[[package]]
+name = "parking_lot_core"
+version = "0.8.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d76e8e1493bcac0d2766c42737f34458f1c8c50c0d23bcb24ea953affb273216"
+dependencies = [
+ "cfg-if 1.0.0",
+ "instant",
+ "libc 0.2.126",
+ "redox_syscall",
+ "smallvec",
+ "winapi 0.3.9",
+]
+
+[[package]]
+name = "percent-encoding"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d4fd5641d01c8f18a23da7b6fe29298ff4b55afcccdf78973b24cf3175fee32e"
+
+[[package]]
+name = "pkg-config"
+version = "0.3.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1df8c4ec4b0627e53bdf214615ad287367e482558cf84b109250b37464dc03ae"
+
+[[package]]
+name = "png"
+version = "0.16.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c3287920cb847dee3de33d301c463fba14dda99db24214ddf93f83d3021f4c6"
+dependencies = [
+ "bitflags",
+ "crc32fast",
+ "deflate",
+ "miniz_oxide",
+]
+
+[[package]]
+name = "proc-macro-crate"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d6ea3c4595b96363c13943497db34af4460fb474a95c43f4446ad341b8c9785"
+dependencies = [
+ "toml",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.40"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dd96a1e8ed2596c337f8eae5f24924ec83f5ad5ab21ea8e455d3566c69fbcaf7"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3bcdf212e9776fbcb2d23ab029360416bb1706b1aea2d1a5ba002727cbcab804"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "rand"
+version = "0.3.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "64ac302d8f83c0c1974bf758f6b041c6c8ada916fbb44a609158ca8b064cc76c"
+dependencies = [
+ "libc 0.2.126",
+ "rand 0.4.6",
+]
+
+[[package]]
+name = "rand"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "552840b97013b1a26992c11eac34bdd778e464601a4c2054b5f0bff7c6761293"
+dependencies = [
+ "fuchsia-cprng",
+ "libc 0.2.126",
+ "rand_core 0.3.1",
+ "rdrand",
+ "winapi 0.3.9",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a6fdeb83b075e8266dcc8762c22776f6877a63111121f5f8c7411e5be7eed4b"
+dependencies = [
+ "rand_core 0.4.2",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c33a3c44ca05fa6f1807d8e6743f3824e8509beca625669633be0acbdf509dc"
+
+[[package]]
+name = "raw-window-handle"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e28f55143d0548dad60bb4fbdc835a3d7ac6acc3324506450c5fdd6e42903a76"
+dependencies = [
+ "libc 0.2.126",
+ "raw-window-handle 0.4.3",
+]
+
+[[package]]
+name = "raw-window-handle"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b800beb9b6e7d2df1fe337c9e3d04e3af22a124460fb4c30fcc22c9117cefb41"
+dependencies = [
+ "cty",
+]
+
+[[package]]
+name = "rdrand"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "678054eb77286b51581ba43620cc911abf02758c91f93f479767aed0f90458b2"
+dependencies = [
+ "rand_core 0.3.1",
+]
+
+[[package]]
+name = "redox_syscall"
+version = "0.2.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "62f25bc4c7e55e0b0b7a1d43fb893f4fa1361d0abe38b9ce4f323c2adfe6ef42"
+dependencies = [
+ "bitflags",
+]
+
+[[package]]
+name = "redox_users"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b033d837a7cf162d7993aded9304e30a83213c648b6e389db233191f891e5c2b"
+dependencies = [
+ "getrandom",
+ "redox_syscall",
+ "thiserror",
+]
+
+[[package]]
+name = "rusttype"
+version = "0.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc7c727aded0be18c5b80c1640eae0ac8e396abf6fa8477d96cb37d18ee5ec59"
+dependencies = [
+ "ab_glyph_rasterizer",
+ "owned_ttf_parser",
+]
+
+[[package]]
+name = "same-file"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "93fc1dc3aaa9bfed95e02e6eadabb4baf7e3078b0bd1b4d7b6b0b68378900502"
+dependencies = [
+ "winapi-util",
+]
+
+[[package]]
+name = "scoped-tls"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ea6a9290e3c9cf0f18145ef7ffa62d68ee0bf5fcd651017e586dc7fd5da448c2"
+
+[[package]]
+name = "scopeguard"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
+
+[[package]]
+name = "sema"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e3af15ff9b4a7d4bd2b21222c05154ee58260780a4d492c22de810f4f4187832"
+dependencies = [
+ "libc 0.1.12",
+ "rand 0.3.23",
+ "time",
+]
+
+[[package]]
+name = "serde"
+version = "1.0.137"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "61ea8d54c77f8315140a05f4c7237403bf38b72704d031543aa1d16abbf517d1"
+
+[[package]]
+name = "slab"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eb703cfe953bccee95685111adeedb76fabe4e97549a58d16f03ea7b9367bb32"
+
+[[package]]
+name = "smallvec"
+version = "1.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2fd0db749597d91ff862fd1d55ea87f7855a744a8425a64695b6fca237d1dad1"
+
+[[package]]
+name = "smithay-client-toolkit"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4750c76fd5d3ac95fa3ed80fe667d6a3d8590a960e5b575b98eea93339a80b80"
+dependencies = [
+ "andrew",
+ "bitflags",
+ "calloop",
+ "dlib 0.4.2",
+ "lazy_static",
+ "log",
+ "memmap2",
+ "nix 0.18.0",
+ "wayland-client",
+ "wayland-cursor",
+ "wayland-protocols",
+]
+
+[[package]]
+name = "strsim"
+version = "0.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6446ced80d6c486436db5c078dde11a9f73d42b57fb273121e160b84f63d894c"
+
+[[package]]
+name = "syn"
+version = "1.0.98"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c50aef8a904de4c23c788f104b7dddc7d6f79c647c7c8ce4cc8f73eb0ca773dd"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "thiserror"
+version = "1.0.31"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bd829fe32373d27f76265620b5309d0340cb8550f523c1dda251d6298069069a"
+dependencies = [
+ "thiserror-impl",
+]
+
+[[package]]
+name = "thiserror-impl"
+version = "1.0.31"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0396bc89e626244658bef819e22d0cc459e795a5ebe878e6ec336d1674a8d79a"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "time"
+version = "0.1.44"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6db9e6914ab8b1ae1c260a4ae7a49b6c5611b40328a735b21862567685e73255"
+dependencies = [
+ "libc 0.2.126",
+ "wasi 0.10.0+wasi-snapshot-preview1",
+ "winapi 0.3.9",
+]
+
+[[package]]
+name = "toml"
+version = "0.5.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8d82e1a7758622a465f8cee077614c73484dac5b836c02ff6a40d5d1010324d7"
+dependencies = [
+ "serde",
+]
+
+[[package]]
+name = "ttf-parser"
+version = "0.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3e5d7cd7ab3e47dda6e56542f4bbf3824c15234958c6e1bd6aaa347e93499fdc"
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5bd2fe26506023ed7b5e1e315add59d6f584c621d037f9368fea9cfb988f368c"
+
+[[package]]
+name = "walkdir"
+version = "2.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "808cf2735cd4b6866113f648b791c6adc5714537bc222d9347bb203386ffda56"
+dependencies = [
+ "same-file",
+ "winapi 0.3.9",
+ "winapi-util",
+]
+
+[[package]]
+name = "wasi"
+version = "0.10.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a143597ca7c7793eff794def352d41792a93c481eb1042423ff7ff72ba2c31f"
+
+[[package]]
+name = "wasi"
+version = "0.11.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
+
+[[package]]
+name = "wayland-client"
+version = "0.28.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e3ab332350e502f159382201394a78e3cc12d0f04db863429260164ea40e0355"
+dependencies = [
+ "bitflags",
+ "downcast-rs",
+ "libc 0.2.126",
+ "nix 0.20.0",
+ "scoped-tls",
+ "wayland-commons",
+ "wayland-scanner",
+ "wayland-sys",
+]
+
+[[package]]
+name = "wayland-commons"
+version = "0.28.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a21817947c7011bbd0a27e11b17b337bfd022e8544b071a2641232047966fbda"
+dependencies = [
+ "nix 0.20.0",
+ "once_cell",
+ "smallvec",
+ "wayland-sys",
+]
+
+[[package]]
+name = "wayland-cursor"
+version = "0.28.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "be610084edd1586d45e7bdd275fe345c7c1873598caa464c4fb835dee70fa65a"
+dependencies = [
+ "nix 0.20.0",
+ "wayland-client",
+ "xcursor",
+]
+
+[[package]]
+name = "wayland-protocols"
+version = "0.28.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "286620ea4d803bacf61fa087a4242ee316693099ee5a140796aaba02b29f861f"
+dependencies = [
+ "bitflags",
+ "wayland-client",
+ "wayland-commons",
+ "wayland-scanner",
+]
+
+[[package]]
+name = "wayland-scanner"
+version = "0.28.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ce923eb2deb61de332d1f356ec7b6bf37094dc5573952e1c8936db03b54c03f1"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "xml-rs",
+]
+
+[[package]]
+name = "wayland-sys"
+version = "0.28.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d841fca9aed7febf9bed2e9796c49bf58d4152ceda8ac949ebe00868d8f0feb8"
+dependencies = [
+ "dlib 0.5.0",
+ "lazy_static",
+ "pkg-config",
+]
+
+[[package]]
+name = "winapi"
+version = "0.2.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
+
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-build"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-util"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
+dependencies = [
+ "winapi 0.3.9",
+]
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
+[[package]]
+name = "winit"
+version = "0.24.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "da4eda6fce0eb84bd0a33e3c8794eb902e1033d0a1d5a31bc4f19b1b4bbff597"
+dependencies = [
+ "bitflags",
+ "cocoa",
+ "core-foundation 0.9.3",
+ "core-graphics 0.22.3",
+ "core-video-sys",
+ "dispatch",
+ "instant",
+ "lazy_static",
+ "libc 0.2.126",
+ "log",
+ "mio",
+ "mio-extras",
+ "ndk",
+ "ndk-glue",
+ "ndk-sys",
+ "objc",
+ "parking_lot",
+ "percent-encoding",
+ "raw-window-handle 0.3.4",
+ "smithay-client-toolkit",
+ "wayland-client",
+ "winapi 0.3.9",
+ "x11-dl",
+]
+
+[[package]]
+name = "ws2_32-sys"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d59cefebd0c892fa2dd6de581e937301d8552cb44489cdff035c6187cb63fa5e"
+dependencies = [
+ "winapi 0.2.8",
+ "winapi-build",
+]
+
+[[package]]
+name = "x11-dl"
+version = "2.19.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ea26926b4ce81a6f5d9d0f3a0bc401e5a37c6ae14a1bfaa8ff6099ca80038c59"
+dependencies = [
+ "lazy_static",
+ "libc 0.2.126",
+ "pkg-config",
+]
+
+[[package]]
+name = "xcursor"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "463705a63313cd4301184381c5e8042f0a7e9b4bb63653f216311d4ae74690b7"
+dependencies = [
+ "nom",
+]
+
+[[package]]
+name = "xdg"
+version = "2.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0c4583db5cbd4c4c0303df2d15af80f0539db703fa1c68802d4cbbd2dd0f88f6"
+dependencies = [
+ "dirs",
+]
+
+[[package]]
+name = "xml-rs"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d2d7d3948613f75c98fd9328cfdcc45acc4d360655289d0a7d4ec931392200a3"
diff --git a/third_party/rust/metal/Cargo.toml b/third_party/rust/metal/Cargo.toml
new file mode 100644
index 0000000000..9b7c52f8bf
--- /dev/null
+++ b/third_party/rust/metal/Cargo.toml
@@ -0,0 +1,131 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies.
+#
+# If you are reading this file be aware that the original Cargo.toml
+# will likely look very different (and much more reasonable).
+# See Cargo.toml.orig for the original contents.
+
+[package]
+edition = "2018"
+name = "metal"
+version = "0.24.0"
+authors = ["GFX Developers"]
+exclude = [
+    "guide/**/*",
+    "examples/texture/**/*",
+    "tests/**/*",
+    "Cargo.lock",
+    "target/**/*",
+]
+description = "Rust bindings for Metal"
+homepage = "https://github.com/gfx-rs/metal-rs"
+documentation = "https://docs.rs/crate/metal"
+readme = "README.md"
+keywords = [
+    "metal",
+    "graphics",
+    "bindings",
+]
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/gfx-rs/metal-rs"
+
+[package.metadata.docs.rs]
+default-target = "x86_64-apple-darwin"
+
+[[example]]
+name = "window"
+
+[[example]]
+name = "headless-render"
+
+[[example]]
+name = "library"
+
+[[example]]
+name = "reflection"
+
+[[example]]
+name = "caps"
+
+[[example]]
+name = "argument-buffer"
+
+[[example]]
+name = "bindless"
+
+[[example]]
+name = "circle"
+path = "examples/circle/main.rs"
+
+[[example]]
+name = "compute"
+path = "examples/compute/main.rs"
+
+[[example]]
+name = "mps"
+required-features = ["mps"]
+
+[[example]]
+name = "embedded-lib"
+path = "examples/compute/embedded-lib.rs"
+
+[[example]]
+name = "compute-argument-buffer"
+path = "examples/compute/compute-argument-buffer.rs"
+
+[[example]]
+name = "bind"
+
+[[example]]
+name = "events"
+required-features = ["dispatch"]
+
+[[example]]
+name = "fence"
+
+[dependencies.bitflags]
+version = "1"
+
+[dependencies.block]
+version = "0.1.6"
+
+[dependencies.core-graphics-types]
+version = "0.1"
+
+[dependencies.dispatch]
+version = "0.2"
+optional = true
+
+[dependencies.foreign-types]
+version = "0.3.2"
+
+[dependencies.log]
+version = "0.4"
+
+[dependencies.objc]
+version = "0.2.4"
+features = ["objc_exception"]
+
+[dev-dependencies.cocoa]
+version = "0.24.0"
+
+[dev-dependencies.cty]
+version = "0.2.1"
+
+[dev-dependencies.png]
+version = "0.16"
+
+[dev-dependencies.sema]
+version = "0.1.4"
+
+[dev-dependencies.winit]
+version = "0.24"
+
+[features]
+default = []
+mps = []
+private = []
diff --git a/third_party/rust/metal/LICENSE-APACHE b/third_party/rust/metal/LICENSE-APACHE
new file mode 100644
index 0000000000..16fe87b06e
--- /dev/null
+++ b/third_party/rust/metal/LICENSE-APACHE
@@ -0,0 +1,201 @@
+                              Apache License
+                        Version 2.0, January 2004
+                     http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
+
+   "License" shall mean the terms and conditions for use, reproduction,
+   and distribution as defined by Sections 1 through 9 of this document.
+
+   "Licensor" shall mean the copyright owner or entity authorized by
+   the copyright owner that is granting the License.
+
+   "Legal Entity" shall mean the union of the acting entity and all
+   other entities that control, are controlled by, or are under common
+   control with that entity. For the purposes of this definition,
+   "control" means (i) the power, direct or indirect, to cause the
+   direction or management of such entity, whether by contract or
+   otherwise, or (ii) ownership of fifty percent (50%) or more of the
+   outstanding shares, or (iii) beneficial ownership of such entity.
+
+   "You" (or "Your") shall mean an individual or Legal Entity
+   exercising permissions granted by this License.
+
+   "Source" form shall mean the preferred form for making modifications,
+   including but not limited to software source code, documentation
+   source, and configuration files.
+
+   "Object" form shall mean any form resulting from mechanical
+   transformation or translation of a Source form, including but
+   not limited to compiled object code, generated documentation,
+   and conversions to other media types.
+
+   "Work" shall mean the work of authorship, whether in Source or
+   Object form, made available under the License, as indicated by a
+   copyright notice that is included in or attached to the work
+   (an example is provided in the Appendix below).
+
+   "Derivative Works" shall mean any work, whether in Source or Object
+   form, that is based on (or derived from) the Work and for which the
+   editorial revisions, annotations, elaborations, or other modifications
+   represent, as a whole, an original work of authorship. For the purposes
+   of this License, Derivative Works shall not include works that remain
+   separable from, or merely link (or bind by name) to the interfaces of,
+   the Work and Derivative Works thereof.
+
+   "Contribution" shall mean any work of authorship, including
+   the original version of the Work and any modifications or additions
+   to that Work or Derivative Works thereof, that is intentionally
+   submitted to Licensor for inclusion in the Work by the copyright owner
+   or by an individual or Legal Entity authorized to submit on behalf of
+   the copyright owner. For the purposes of this definition, "submitted"
+   means any form of electronic, verbal, or written communication sent
+   to the Licensor or its representatives, including but not limited to
+   communication on electronic mailing lists, source code control systems,
+   and issue tracking systems that are managed by, or on behalf of, the
+   Licensor for the purpose of discussing and improving the Work, but
+   excluding communication that is conspicuously marked or otherwise
+   designated in writing by the copyright owner as "Not a Contribution."
+
+   "Contributor" shall mean Licensor and any individual or Legal Entity
+   on behalf of whom a Contribution has been received by Licensor and
+   subsequently incorporated within the Work.
+
+2. Grant of Copyright License. Subject to the terms and conditions of
+   this License, each Contributor hereby grants to You a perpetual,
+   worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+   copyright license to reproduce, prepare Derivative Works of,
+   publicly display, publicly perform, sublicense, and distribute the
+   Work and such Derivative Works in Source or Object form.
+
+3. Grant of Patent License. Subject to the terms and conditions of
+   this License, each Contributor hereby grants to You a perpetual,
+   worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+   (except as stated in this section) patent license to make, have made,
+   use, offer to sell, sell, import, and otherwise transfer the Work,
+   where such license applies only to those patent claims licensable
+   by such Contributor that are necessarily infringed by their
+   Contribution(s) alone or by combination of their Contribution(s)
+   with the Work to which such Contribution(s) was submitted. If You
+   institute patent litigation against any entity (including a
+   cross-claim or counterclaim in a lawsuit) alleging that the Work
+   or a Contribution incorporated within the Work constitutes direct
+   or contributory patent infringement, then any patent licenses
+   granted to You under this License for that Work shall terminate
+   as of the date such litigation is filed.
+
+4. Redistribution. You may reproduce and distribute copies of the
+   Work or Derivative Works thereof in any medium, with or without
+   modifications, and in Source or Object form, provided that You
+   meet the following conditions:
+
+   (a) You must give any other recipients of the Work or
+       Derivative Works a copy of this License; and
+
+   (b) You must cause any modified files to carry prominent notices
+       stating that You changed the files; and
+
+   (c) You must retain, in the Source form of any Derivative Works
+       that You distribute, all copyright, patent, trademark, and
+       attribution notices from the Source form of the Work,
+       excluding those notices that do not pertain to any part of
+       the Derivative Works; and
+
+   (d) If the Work includes a "NOTICE" text file as part of its
+       distribution, then any Derivative Works that You distribute must
+       include a readable copy of the attribution notices contained
+       within such NOTICE file, excluding those notices that do not
+       pertain to any part of the Derivative Works, in at least one
+       of the following places: within a NOTICE text file distributed
+       as part of the Derivative Works; within the Source form or
+       documentation, if provided along with the Derivative Works; or,
+       within a display generated by the Derivative Works, if and
+       wherever such third-party notices normally appear. The contents
+       of the NOTICE file are for informational purposes only and
+       do not modify the License. You may add Your own attribution
+       notices within Derivative Works that You distribute, alongside
+       or as an addendum to the NOTICE text from the Work, provided
+       that such additional attribution notices cannot be construed
+       as modifying the License.
+
+   You may add Your own copyright statement to Your modifications and
+   may provide additional or different license terms and conditions
+   for use, reproduction, or distribution of Your modifications, or
+   for any such Derivative Works as a whole, provided Your use,
+   reproduction, and distribution of the Work otherwise complies with
+   the conditions stated in this License.
+
+5. Submission of Contributions. Unless You explicitly state otherwise,
+   any Contribution intentionally submitted for inclusion in the Work
+   by You to the Licensor shall be under the terms and conditions of
+   this License, without any additional terms or conditions.
+   Notwithstanding the above, nothing herein shall supersede or modify
+   the terms of any separate license agreement you may have executed
+   with Licensor regarding such Contributions.
+
+6. Trademarks. This License does not grant permission to use the trade
+   names, trademarks, service marks, or product names of the Licensor,
+   except as required for reasonable and customary use in describing the
+   origin of the Work and reproducing the content of the NOTICE file.
+
+7. Disclaimer of Warranty. Unless required by applicable law or
+   agreed to in writing, Licensor provides the Work (and each
+   Contributor provides its Contributions) on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+   implied, including, without limitation, any warranties or conditions
+   of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+   PARTICULAR PURPOSE. You are solely responsible for determining the
+   appropriateness of using or redistributing the Work and assume any
+   risks associated with Your exercise of permissions under this License.
+
+8. Limitation of Liability. In no event and under no legal theory,
+   whether in tort (including negligence), contract, or otherwise,
+   unless required by applicable law (such as deliberate and grossly
+   negligent acts) or agreed to in writing, shall any Contributor be
+   liable to You for damages, including any direct, indirect, special,
+   incidental, or consequential damages of any character arising as a
+   result of this License or out of the use or inability to use the
+   Work (including but not limited to damages for loss of goodwill,
+   work stoppage, computer failure or malfunction, or any and all
+   other commercial damages or losses), even if such Contributor
+   has been advised of the possibility of such damages.
+
+9. Accepting Warranty or Additional Liability. While redistributing
+   the Work or Derivative Works thereof, You may choose to offer,
+   and charge a fee for, acceptance of support, warranty, indemnity,
+   or other liability obligations and/or rights consistent with this
+   License. However, in accepting such obligations, You may act only
+   on Your own behalf and on Your sole responsibility, not on behalf
+   of any other Contributor, and only if You agree to indemnify,
+   defend, and hold each Contributor harmless for any liability
+   incurred by, or claims asserted against, such Contributor by reason
+   of your accepting any such warranty or additional liability.
+
+END OF TERMS AND CONDITIONS
+
+APPENDIX: How to apply the Apache License to your work.
+
+   To apply the Apache License to your work, attach the following
+   boilerplate notice, with the fields enclosed by brackets "[]"
+   replaced with your own identifying information. (Don't include
+   the brackets!)  The text should be enclosed in the appropriate
+   comment syntax for the file format. We also recommend that a
+   file or class name and description of purpose be included on the
+   same "printed page" as the copyright notice for easier
+   identification within third-party archives.
+
+Copyright [yyyy] [name of copyright owner]
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+	http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
diff --git a/third_party/rust/metal/LICENSE-MIT b/third_party/rust/metal/LICENSE-MIT
new file mode 100644
index 0000000000..25597d5838
--- /dev/null
+++ b/third_party/rust/metal/LICENSE-MIT
@@ -0,0 +1,25 @@
+Copyright (c) 2010 The Rust Project Developers
+
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
diff --git a/third_party/rust/metal/Makefile b/third_party/rust/metal/Makefile
new file mode 100644
index 0000000000..bc35876945
--- /dev/null
+++ b/third_party/rust/metal/Makefile
@@ -0,0 +1,12 @@
+
+compute:
+	xcrun -sdk macosx metal -c examples/compute/shaders.metal -o examples/compute/shaders.air
+	xcrun -sdk macosx metallib examples/compute/shaders.air -o examples/compute/shaders.metallib
+
+window:
+	xcrun -sdk macosx metal -c examples/window/shaders.metal -o examples/window/shaders.air
+	xcrun -sdk macosx metallib examples/window/shaders.air -o examples/window/shaders.metallib
+
+circle:
+	xcrun -sdk macosx metal -c examples/circle/shaders.metal -o examples/circle/shaders.air
+	xcrun -sdk macosx metallib examples/circle/shaders.air -o examples/circle/shaders.metallib
diff --git a/third_party/rust/metal/README.md b/third_party/rust/metal/README.md
new file mode 100644
index 0000000000..7fac036e5f
--- /dev/null
+++ b/third_party/rust/metal/README.md
@@ -0,0 +1,32 @@
+# metal-rs
+[![Actions Status](https://github.com/gfx-rs/metal-rs/workflows/ci/badge.svg)](https://github.com/gfx-rs/metal-rs/actions)
+[![Crates.io](https://img.shields.io/crates/v/metal.svg?label=metal)](https://crates.io/crates/metal)
+
+Unsafe Rust bindings for the Metal 3D Graphics API.
+
+## Examples
+
+The [examples](/examples) directory highlights different ways of using the Metal graphics API for rendering
+and computation.
+
+Examples can be run using commands such as:
+
+```
+# Replace `window` with the name of the example that you would like to run
+cargo run --example window
+```
+
+## License
+
+Licensed under either of
+
+ * Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
+ * MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
+
+at your option.
+
+### Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
+dual licensed as above, without any additional terms or conditions.
diff --git a/third_party/rust/metal/bors.toml b/third_party/rust/metal/bors.toml
new file mode 100644
index 0000000000..49ca8c96a8
--- /dev/null
+++ b/third_party/rust/metal/bors.toml
@@ -0,0 +1,8 @@
+status = [ "build (stable)" ]
+
+# As of May 2020 we can expect CI to take roughly 3 minutes based on
+# Based on https://github.com/chinedufn/metal-rs/actions/runs/94020785
+#
+# We round this up to a timeout of 5 minutes to account for any potential future
+# inconsistencies in CI run times.
+timeout-sec = 300
diff --git a/third_party/rust/metal/examples/argument-buffer/main.rs b/third_party/rust/metal/examples/argument-buffer/main.rs
new file mode 100644
index 0000000000..23e88990d9
--- /dev/null
+++ b/third_party/rust/metal/examples/argument-buffer/main.rs
@@ -0,0 +1,88 @@
+// Copyright 2017 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use metal::*;
+use objc::rc::autoreleasepool;
+
+fn main() {
+    autoreleasepool(|| {
+        let device = Device::system_default().expect("no device found");
+
+        /*
+
+        // Build encoder for the following MSL argument buffer:
+        struct ArgumentBuffer {
+            texture2d<float> texture [[id(0)]];
+            sampler sampler [[id(1)]];
+            array<device float *, 2> buffers [[id(2)]];
+        }
+
+         */
+
+        let desc1 = ArgumentDescriptor::new();
+        desc1.set_index(0);
+        desc1.set_data_type(MTLDataType::Texture);
+        desc1.set_texture_type(MTLTextureType::D2);
+
+        let desc2 = ArgumentDescriptor::new();
+        desc2.set_index(1);
+        desc2.set_data_type(MTLDataType::Sampler);
+
+        let desc3 = ArgumentDescriptor::new();
+        desc3.set_index(2);
+        desc3.set_data_type(MTLDataType::Pointer);
+        desc3.set_array_length(2);
+
+        let encoder = device.new_argument_encoder(Array::from_slice(&[desc1, desc2, desc3]));
+        println!("Encoder: {:?}", encoder);
+
+        let argument_buffer =
+            device.new_buffer(encoder.encoded_length(), MTLResourceOptions::empty());
+        encoder.set_argument_buffer(&argument_buffer, 0);
+
+        let sampler = {
+            let descriptor = SamplerDescriptor::new();
+            descriptor.set_support_argument_buffers(true);
+            device.new_sampler(&descriptor)
+        };
+        println!("{:?}", sampler);
+
+        let buffer1 = device.new_buffer(1024, MTLResourceOptions::empty());
+        println!("Buffer1: {:?}", buffer1);
+        let buffer2 = device.new_buffer(1024, MTLResourceOptions::empty());
+        println!("Buffer2: {:?}", buffer2);
+
+        encoder.set_sampler_state(1, &sampler);
+        encoder.set_buffer(2, &buffer1, 0);
+        encoder.set_buffer(3, &buffer2, 0);
+
+        // How to use argument buffer with render encoder.
+
+        let queue = device.new_command_queue();
+        let command_buffer = queue.new_command_buffer();
+
+        let render_pass_descriptor = RenderPassDescriptor::new();
+        let encoder = command_buffer.new_render_command_encoder(render_pass_descriptor);
+
+        // This method makes the array of resources resident for the selected stages of the render pass.
+        // Call this method before issuing any draw calls that may access the array of resources.
+        encoder.use_resources(
+            &[&buffer1, &buffer2],
+            MTLResourceUsage::Read,
+            MTLRenderStages::Vertex,
+        );
+        // Bind argument buffer to vertex stage.
+        encoder.set_vertex_buffer(0, Some(&argument_buffer), 0);
+
+        // Render pass here...
+
+        encoder.end_encoding();
+        println!("Encoder: {:?}", encoder);
+
+        command_buffer.commit();
+    });
+}
diff --git a/third_party/rust/metal/examples/bind/main.rs b/third_party/rust/metal/examples/bind/main.rs
new file mode 100644
index 0000000000..811b1c5a17
--- /dev/null
+++ b/third_party/rust/metal/examples/bind/main.rs
@@ -0,0 +1,34 @@
+// Copyright 2018 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use metal::*;
+use objc::rc::autoreleasepool;
+
+fn main() {
+    autoreleasepool(|| {
+        let device = Device::system_default().expect("no device found");
+
+        let buffer = device.new_buffer(4, MTLResourceOptions::empty());
+        let sampler = {
+            let descriptor = SamplerDescriptor::new();
+            device.new_sampler(&descriptor)
+        };
+
+        let queue = device.new_command_queue();
+        let cmd_buf = queue.new_command_buffer();
+
+        let encoder = cmd_buf.new_compute_command_encoder();
+
+        encoder.set_buffers(2, &[Some(&buffer), None], &[4, 0]);
+        encoder.set_sampler_states(1, &[Some(&sampler), None]);
+
+        encoder.end_encoding();
+        cmd_buf.commit();
+
+        println!("Everything is bound");
+    });
+}
diff --git a/third_party/rust/metal/examples/bindless/main.rs b/third_party/rust/metal/examples/bindless/main.rs
new file mode 100644
index 0000000000..09c3a59ab9
--- /dev/null
+++ b/third_party/rust/metal/examples/bindless/main.rs
@@ -0,0 +1,149 @@
+// Copyright 2017 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use metal::*;
+use objc::rc::autoreleasepool;
+
+const BINDLESS_TEXTURE_COUNT: NSUInteger = 100_000; // ~25Mb
+
+/// This example demonstrates:
+/// - How to create a heap
+/// - How to allocate textures from heap.
+/// - How to create bindless resources via Metal's argument buffers.
+/// - How to bind argument buffer to render encoder
+fn main() {
+    autoreleasepool(|| {
+        let device = Device::system_default().expect("no device found");
+
+        /*
+
+        MSL
+
+        struct Textures {
+            texture2d<float> texture;
+        };
+        struct BindlessTextures {
+            device Textures *textures;
+        };
+
+         */
+
+        // Tier 2 argument buffers are supported by macOS devices with a discrete GPU and by the A13 GPU.
+        // The maximum per-app resources available at any given time are:
+        // - 500,000 buffers or textures
+        // - 2048 unique samplers
+        let tier = device.argument_buffers_support();
+        println!("Argument buffer support: {:?}", tier);
+        assert_eq!(MTLArgumentBuffersTier::Tier2, tier);
+
+        let texture_descriptor = TextureDescriptor::new();
+        texture_descriptor.set_width(1);
+        texture_descriptor.set_height(1);
+        texture_descriptor.set_depth(1);
+        texture_descriptor.set_texture_type(MTLTextureType::D2);
+        texture_descriptor.set_pixel_format(MTLPixelFormat::R8Uint);
+        texture_descriptor.set_storage_mode(MTLStorageMode::Private); // GPU only.
+        println!("Texture descriptor: {:?}", texture_descriptor);
+
+        // Determine the size required for the heap for the given descriptor
+        let size_and_align = device.heap_texture_size_and_align(&texture_descriptor);
+
+        // Align the size so that more resources will fit in the heap after this texture
+        // See https://developer.apple.com/documentation/metal/buffers/using_argument_buffers_with_resource_heaps
+        let texture_size =
+            (size_and_align.size & (size_and_align.align - 1)) + size_and_align.align;
+        let heap_size = texture_size * BINDLESS_TEXTURE_COUNT;
+
+        let heap_descriptor = HeapDescriptor::new();
+        heap_descriptor.set_storage_mode(texture_descriptor.storage_mode()); // Must be compatible
+        heap_descriptor.set_size(heap_size);
+        println!("Heap descriptor: {:?}", heap_descriptor);
+
+        let heap = device.new_heap(&heap_descriptor);
+        println!("Heap: {:?}", heap);
+
+        // Allocate textures from heap
+        let textures = (0..BINDLESS_TEXTURE_COUNT)
+            .map(|i| {
+                heap.new_texture(&texture_descriptor)
+                    .expect(&format!("Failed to allocate texture {}", i))
+            })
+            .collect::<Vec<_>>();
+
+        // Crate argument encoder that knows how to encode single texture
+        let descriptor = ArgumentDescriptor::new();
+        descriptor.set_index(0);
+        descriptor.set_data_type(MTLDataType::Texture);
+        descriptor.set_texture_type(MTLTextureType::D2);
+        descriptor.set_access(MTLArgumentAccess::ReadOnly);
+        println!("Argument descriptor: {:?}", descriptor);
+
+        let encoder = device.new_argument_encoder(Array::from_slice(&[descriptor]));
+        println!("Encoder: {:?}", encoder);
+
+        // Determinate argument buffer size to allocate.
+        // Size needed to encode one texture * total number of bindless textures.
+        let argument_buffer_size = encoder.encoded_length() * BINDLESS_TEXTURE_COUNT;
+        let argument_buffer = device.new_buffer(argument_buffer_size, MTLResourceOptions::empty());
+
+        // Encode textures to the argument buffer.
+        textures.iter().enumerate().for_each(|(index, texture)| {
+            // Offset encoder to a proper texture slot
+            let offset = index as NSUInteger * encoder.encoded_length();
+            encoder.set_argument_buffer(&argument_buffer, offset);
+            encoder.set_texture(0, texture);
+        });
+
+        // How to use bindless argument buffer when drawing
+
+        let queue = device.new_command_queue();
+        let command_buffer = queue.new_command_buffer();
+
+        let render_pass_descriptor = RenderPassDescriptor::new();
+        let encoder = command_buffer.new_render_command_encoder(render_pass_descriptor);
+
+        // Bind argument buffer.
+        encoder.set_fragment_buffer(0, Some(&argument_buffer), 0);
+        // Make sure all textures are available to the pass.
+        encoder.use_heap_at(&heap, MTLRenderStages::Fragment);
+
+        // Bind material buffer at index 1
+        // Draw
+
+        /*
+
+        // Now instead of binding individual textures each draw call,
+        // you can just bind material information instead:
+
+        MSL
+
+        struct Material {
+            int diffuse_texture_index;
+            int normal_texture_index;
+            // ...
+        }
+
+        fragment float4 pixel(
+            VertexOut v [[stage_in]],
+            constant const BindlessTextures * textures [[buffer(0)]],
+            constant Material * material [[buffer(1)]]
+        ) {
+            if (material->base_color_texture_index != -1) {
+                textures[material->diffuse_texture_index].texture.sampler(...)
+            }
+            if (material->normal_texture_index != -1) {
+                ...
+            }
+            ...
+        }
+
+         */
+
+        encoder.end_encoding();
+        command_buffer.commit();
+    });
+}
diff --git a/third_party/rust/metal/examples/caps/main.rs b/third_party/rust/metal/examples/caps/main.rs
new file mode 100644
index 0000000000..ae8fca4f0a
--- /dev/null
+++ b/third_party/rust/metal/examples/caps/main.rs
@@ -0,0 +1,33 @@
+// Copyright 2017 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use metal::*;
+
+fn main() {
+    let device = Device::system_default().expect("no device found");
+
+    #[cfg(feature = "private")]
+    {
+        println!("Vendor: {:?}", unsafe { device.vendor() });
+        println!("Family: {:?}", unsafe { device.family_name() });
+    }
+    println!(
+        "Max threads per threadgroup: {:?}",
+        device.max_threads_per_threadgroup()
+    );
+    #[cfg(target_os = "macos")]
+    {
+        println!("Integrated GPU: {:?}", device.is_low_power());
+        println!("Headless: {:?}", device.is_headless());
+        println!("D24S8: {:?}", device.d24_s8_supported());
+    }
+    println!("maxBufferLength: {} Mb", device.max_buffer_length() >> 20);
+    println!(
+        "Indirect argument buffer: {:?}",
+        device.argument_buffers_support()
+    );
+}
diff --git a/third_party/rust/metal/examples/circle/README.md b/third_party/rust/metal/examples/circle/README.md
new file mode 100644
index 0000000000..f51853ac38
--- /dev/null
+++ b/third_party/rust/metal/examples/circle/README.md
@@ -0,0 +1,11 @@
+## circle
+
+Renders a circle in a window. As metal primitive types are only limited to point, line and triangle shape, this example shows how we can form complex structures out of primitive types.
+
+![Screenshot of the final render](./screenshot.png)
+
+## To Run
+
+```
+cargo run --example circle
+```
diff --git a/third_party/rust/metal/examples/circle/main.rs b/third_party/rust/metal/examples/circle/main.rs
new file mode 100644
index 0000000000..18da704421
--- /dev/null
+++ b/third_party/rust/metal/examples/circle/main.rs
@@ -0,0 +1,251 @@
+use metal::*;
+
+use winit::{
+    event::{Event, WindowEvent},
+    event_loop::{ControlFlow, EventLoop},
+    platform::macos::WindowExtMacOS,
+};
+
+use cocoa::{appkit::NSView, base::id as cocoa_id};
+use core_graphics_types::geometry::CGSize;
+
+use objc::{rc::autoreleasepool, runtime::YES};
+
+use std::mem;
+
+// Declare the data structures needed to carry vertex layout to
+// metal shading language(MSL) program. Use #[repr(C)], to make
+// the data structure compatible with C++ type data structure
+// for vertex defined in MSL program as MSL program is broadly
+// based on C++
+#[repr(C)]
+#[derive(Debug)]
+pub struct position(cty::c_float, cty::c_float);
+#[repr(C)]
+#[derive(Debug)]
+pub struct color(cty::c_float, cty::c_float, cty::c_float);
+#[repr(C)]
+#[derive(Debug)]
+pub struct AAPLVertex {
+    p: position,
+    c: color,
+}
+
+fn main() {
+    // Create a window for viewing the content
+    let event_loop = EventLoop::new();
+    let events_loop = winit::event_loop::EventLoop::new();
+    let size = winit::dpi::LogicalSize::new(800, 600);
+
+    let window = winit::window::WindowBuilder::new()
+        .with_inner_size(size)
+        .with_title("Metal".to_string())
+        .build(&events_loop)
+        .unwrap();
+
+    // Set up the GPU device found in the system
+    let device = Device::system_default().expect("no device found");
+    println!("Your device is: {}", device.name(),);
+
+    let binary_archive_path = std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR"))
+        .join("examples/circle/binary_archive.metallib");
+
+    let binary_archive_url =
+        URL::new_with_string(&format!("file://{}", binary_archive_path.display()));
+
+    let binary_archive_descriptor = BinaryArchiveDescriptor::new();
+    if binary_archive_path.exists() {
+        binary_archive_descriptor.set_url(&binary_archive_url);
+    }
+
+    // Set up a binary archive to cache compiled shaders.
+    let binary_archive = device
+        .new_binary_archive_with_descriptor(&binary_archive_descriptor)
+        .unwrap();
+
+    let library_path = std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR"))
+        .join("examples/circle/shaders.metallib");
+
+    // Use the metallib file generated out of .metal shader file
+    let library = device.new_library_with_file(library_path).unwrap();
+
+    // The render pipeline generated from the vertex and fragment shaders in the .metal shader file.
+    let pipeline_state = prepare_pipeline_state(&device, &library, &binary_archive);
+
+    // Serialize the binary archive to disk.
+    binary_archive
+        .serialize_to_url(&binary_archive_url)
+        .unwrap();
+
+    // Set the command queue used to pass commands to the device.
+    let command_queue = device.new_command_queue();
+
+    // Currently, MetalLayer is the only interface that provide
+    // layers to carry drawable texture from GPU rendaring through metal
+    // library to viewable windows.
+    let layer = MetalLayer::new();
+    layer.set_device(&device);
+    layer.set_pixel_format(MTLPixelFormat::BGRA8Unorm);
+    layer.set_presents_with_transaction(false);
+
+    unsafe {
+        let view = window.ns_view() as cocoa_id;
+        view.setWantsLayer(YES);
+        view.setLayer(mem::transmute(layer.as_ref()));
+    }
+
+    let draw_size = window.inner_size();
+    layer.set_drawable_size(CGSize::new(draw_size.width as f64, draw_size.height as f64));
+
+    let vbuf = {
+        let vertex_data = create_vertex_points_for_circle();
+        let vertex_data = vertex_data.as_slice();
+
+        device.new_buffer_with_data(
+            vertex_data.as_ptr() as *const _,
+            (vertex_data.len() * mem::size_of::<AAPLVertex>()) as u64,
+            MTLResourceOptions::CPUCacheModeDefaultCache | MTLResourceOptions::StorageModeManaged,
+        )
+    };
+
+    event_loop.run(move |event, _, control_flow| {
+        autoreleasepool(|| {
+            // ControlFlow::Wait pauses the event loop if no events are available to process.
+            // This is ideal for non-game applications that only update in response to user
+            // input, and uses significantly less power/CPU time than ControlFlow::Poll.
+            *control_flow = ControlFlow::Wait;
+
+            match event {
+                Event::WindowEvent {
+                    event: WindowEvent::CloseRequested,
+                    ..
+                } => {
+                    println!("The close button was pressed; stopping");
+                    *control_flow = ControlFlow::Exit
+                }
+                Event::MainEventsCleared => {
+                    // Queue a RedrawRequested event.
+                    window.request_redraw();
+                }
+                Event::RedrawRequested(_) => {
+                    // It's preferrable to render in this event rather than in MainEventsCleared, since
+                    // rendering in here allows the program to gracefully handle redraws requested
+                    // by the OS.
+                    let drawable = match layer.next_drawable() {
+                        Some(drawable) => drawable,
+                        None => return,
+                    };
+
+                    // Create a new command buffer for each render pass to the current drawable
+                    let command_buffer = command_queue.new_command_buffer();
+
+                    // Obtain a renderPassDescriptor generated from the view's drawable textures.
+                    let render_pass_descriptor = RenderPassDescriptor::new();
+                    prepare_render_pass_descriptor(&render_pass_descriptor, drawable.texture());
+
+                    // Create a render command encoder.
+                    let encoder =
+                        command_buffer.new_render_command_encoder(&render_pass_descriptor);
+                    encoder.set_render_pipeline_state(&pipeline_state);
+                    // Pass in the parameter data.
+                    encoder.set_vertex_buffer(0, Some(&vbuf), 0);
+                    // Draw the triangles which will eventually form the circle.
+                    encoder.draw_primitives(MTLPrimitiveType::TriangleStrip, 0, 1080);
+                    encoder.end_encoding();
+
+                    // Schedule a present once the framebuffer is complete using the current drawable.
+                    command_buffer.present_drawable(&drawable);
+
+                    // Finalize rendering here & push the command buffer to the GPU.
+                    command_buffer.commit();
+                }
+                _ => (),
+            }
+        });
+    });
+}
+
+// If we want to draw a circle, we need to draw it out of the three primitive
+// types available with metal framework. Triangle is used in this case to form
+// the circle. If we consider a circle to be total of 360 degree at center, we
+// can form small triangle with one point at origin and two points at the
+// perimeter of the circle for each degree. Eventually, if we can take enough
+// triangle virtices for total of 360 degree, the triangles together will
+// form a circle. This function captures the triangle vertices for each degree
+// and push the co-ordinates of the vertices to a rust vector
+fn create_vertex_points_for_circle() -> Vec<AAPLVertex> {
+    let mut v: Vec<AAPLVertex> = Vec::new();
+    let origin_x: f32 = 0.0;
+    let origin_y: f32 = 0.0;
+
+    // Size of the circle
+    let circle_size = 0.8f32;
+
+    for i in 0..720 {
+        let y = i as f32;
+        // Get the X co-ordinate of each point on the perimeter of circle
+        let position_x: f32 = y.to_radians().cos() * 100.0;
+        let position_x: f32 = position_x.trunc() / 100.0;
+        // Set the size of the circle
+        let position_x: f32 = position_x * circle_size;
+        // Get the Y co-ordinate of each point on the perimeter of circle
+        let position_y: f32 = y.to_radians().sin() * 100.0;
+        let position_y: f32 = position_y.trunc() / 100.0;
+        // Set the size of the circle
+        let position_y: f32 = position_y * circle_size;
+
+        v.push(AAPLVertex {
+            p: position(position_x, position_y),
+            c: color(0.7, 0.3, 0.5),
+        });
+
+        if (i + 1) % 2 == 0 {
+            // For each two points on perimeter, push one point of origin
+            v.push(AAPLVertex {
+                p: position(origin_x, origin_y),
+                c: color(0.2, 0.7, 0.4),
+            });
+        }
+    }
+
+    v
+}
+
+fn prepare_render_pass_descriptor(descriptor: &RenderPassDescriptorRef, texture: &TextureRef) {
+    let color_attachment = descriptor.color_attachments().object_at(0).unwrap();
+
+    color_attachment.set_texture(Some(texture));
+    color_attachment.set_load_action(MTLLoadAction::Clear);
+    // Setting a background color
+    color_attachment.set_clear_color(MTLClearColor::new(0.5, 0.5, 0.8, 1.0));
+    color_attachment.set_store_action(MTLStoreAction::Store);
+}
+
+fn prepare_pipeline_state(
+    device: &Device,
+    library: &Library,
+    binary_archive: &BinaryArchive,
+) -> RenderPipelineState {
+    let vert = library.get_function("vs", None).unwrap();
+    let frag = library.get_function("ps", None).unwrap();
+
+    let pipeline_state_descriptor = RenderPipelineDescriptor::new();
+    pipeline_state_descriptor.set_vertex_function(Some(&vert));
+    pipeline_state_descriptor.set_fragment_function(Some(&frag));
+    pipeline_state_descriptor
+        .color_attachments()
+        .object_at(0)
+        .unwrap()
+        .set_pixel_format(MTLPixelFormat::BGRA8Unorm);
+    // Set the binary archives to search for a cached pipeline in.
+    pipeline_state_descriptor.set_binary_archives(&[binary_archive]);
+
+    // Add the pipeline descriptor to the binary archive cache.
+    binary_archive
+        .add_render_pipeline_functions_with_descriptor(&pipeline_state_descriptor)
+        .unwrap();
+
+    device
+        .new_render_pipeline_state(&pipeline_state_descriptor)
+        .unwrap()
+}
diff --git a/third_party/rust/metal/examples/circle/screenshot.png b/third_party/rust/metal/examples/circle/screenshot.png
new file mode 100644
index 0000000000..38f86e733d
--- /dev/null
+++ b/third_party/rust/metal/examples/circle/screenshot.png
diff --git a/third_party/rust/metal/examples/circle/shaders.metal b/third_party/rust/metal/examples/circle/shaders.metal
new file mode 100644
index 0000000000..037af8a233
--- /dev/null
+++ b/third_party/rust/metal/examples/circle/shaders.metal
@@ -0,0 +1,39 @@
+#include <metal_stdlib>
+
+#include <simd/simd.h>
+
+using namespace metal;
+
+typedef struct {
+  float x;
+  float y;
+}position;
+
+typedef struct {
+  float r;
+  float g;
+  float b;
+}color;
+
+typedef struct {
+  position p;
+  color c;
+}AAPLVertex;
+
+struct ColorInOut {
+  float4 position[[position]];
+  float4 color;
+};
+
+vertex ColorInOut vs(constant AAPLVertex * vertex_array[[buffer(0)]], unsigned int vid[[vertex_id]]) {
+  ColorInOut out;
+
+  out.position = float4(float2(vertex_array[vid].p.x, vertex_array[vid].p.y), 0.0, 1.0);
+  out.color = float4(float3(vertex_array[vid].c.r, vertex_array[vid].c.g, vertex_array[vid].c.b), 1.0);
+
+  return out;
+}
+
+fragment float4 ps(ColorInOut in [[stage_in]]) {
+  return in.color;
+}
diff --git a/third_party/rust/metal/examples/circle/shaders.metallib b/third_party/rust/metal/examples/circle/shaders.metallib
new file mode 100644
index 0000000000..cbb9bc5e5a
--- /dev/null
+++ b/third_party/rust/metal/examples/circle/shaders.metallib
diff --git a/third_party/rust/metal/examples/compute/compute-argument-buffer.metal b/third_party/rust/metal/examples/compute/compute-argument-buffer.metal
new file mode 100644
index 0000000000..1dcc79daf5
--- /dev/null
+++ b/third_party/rust/metal/examples/compute/compute-argument-buffer.metal
@@ -0,0 +1,14 @@
+#include <metal_stdlib>
+
+using namespace metal;
+
+struct SumInput {
+    device uint *data;
+    volatile device atomic_uint *sum;
+};
+
+kernel void sum(device SumInput& input [[ buffer(0) ]],
+                uint gid [[ thread_position_in_grid ]])
+{
+    atomic_fetch_add_explicit(input.sum, input.data[gid], memory_order_relaxed);
+}
diff --git a/third_party/rust/metal/examples/compute/compute-argument-buffer.rs b/third_party/rust/metal/examples/compute/compute-argument-buffer.rs
new file mode 100644
index 0000000000..97527091a3
--- /dev/null
+++ b/third_party/rust/metal/examples/compute/compute-argument-buffer.rs
@@ -0,0 +1,95 @@
+// Copyright 2017 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use metal::*;
+use objc::rc::autoreleasepool;
+use std::mem;
+
+static LIBRARY_SRC: &str = include_str!("compute-argument-buffer.metal");
+
+fn main() {
+    autoreleasepool(|| {
+        let device = Device::system_default().expect("no device found");
+        let command_queue = device.new_command_queue();
+
+        let data = [
+            1u32, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
+            24, 25, 26, 27, 28, 29, 30,
+        ];
+
+        let buffer = device.new_buffer_with_data(
+            unsafe { mem::transmute(data.as_ptr()) },
+            (data.len() * mem::size_of::<u32>()) as u64,
+            MTLResourceOptions::CPUCacheModeDefaultCache,
+        );
+
+        let sum = {
+            let data = [0u32];
+            device.new_buffer_with_data(
+                unsafe { mem::transmute(data.as_ptr()) },
+                (data.len() * mem::size_of::<u32>()) as u64,
+                MTLResourceOptions::CPUCacheModeDefaultCache,
+            )
+        };
+
+        let command_buffer = command_queue.new_command_buffer();
+        let encoder = command_buffer.new_compute_command_encoder();
+
+        let library = device
+            .new_library_with_source(LIBRARY_SRC, &CompileOptions::new())
+            .unwrap();
+        let kernel = library.get_function("sum", None).unwrap();
+
+        let argument_encoder = kernel.new_argument_encoder(0);
+        let arg_buffer = device.new_buffer(
+            argument_encoder.encoded_length(),
+            MTLResourceOptions::empty(),
+        );
+        argument_encoder.set_argument_buffer(&arg_buffer, 0);
+        argument_encoder.set_buffer(0, &buffer, 0);
+        argument_encoder.set_buffer(1, &sum, 0);
+
+        let pipeline_state_descriptor = ComputePipelineDescriptor::new();
+        pipeline_state_descriptor.set_compute_function(Some(&kernel));
+
+        let pipeline_state = device
+            .new_compute_pipeline_state_with_function(
+                pipeline_state_descriptor.compute_function().unwrap(),
+            )
+            .unwrap();
+
+        encoder.set_compute_pipeline_state(&pipeline_state);
+        encoder.set_buffer(0, Some(&arg_buffer), 0);
+
+        encoder.use_resource(&buffer, MTLResourceUsage::Read);
+        encoder.use_resource(&sum, MTLResourceUsage::Write);
+
+        let width = 16;
+
+        let thread_group_count = MTLSize {
+            width,
+            height: 1,
+            depth: 1,
+        };
+
+        let thread_group_size = MTLSize {
+            width: (data.len() as u64 + width) / width,
+            height: 1,
+            depth: 1,
+        };
+
+        encoder.dispatch_thread_groups(thread_group_count, thread_group_size);
+        encoder.end_encoding();
+        command_buffer.commit();
+        command_buffer.wait_until_completed();
+
+        let ptr = sum.contents() as *mut u32;
+        unsafe {
+            assert_eq!(465, *ptr);
+        }
+    });
+}
diff --git a/third_party/rust/metal/examples/compute/embedded-lib.rs b/third_party/rust/metal/examples/compute/embedded-lib.rs
new file mode 100644
index 0000000000..0fd193abe3
--- /dev/null
+++ b/third_party/rust/metal/examples/compute/embedded-lib.rs
@@ -0,0 +1,24 @@
+// Copyright 2017 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use metal::*;
+use objc::rc::autoreleasepool;
+
+fn main() {
+    let library_data = include_bytes!("shaders.metallib");
+
+    autoreleasepool(|| {
+        let device = Device::system_default().expect("no device found");
+
+        let library = device.new_library_with_data(&library_data[..]).unwrap();
+        let kernel = library.get_function("sum", None).unwrap();
+
+        println!("Function name: {}", kernel.name());
+        println!("Function type: {:?}", kernel.function_type());
+        println!("OK");
+    });
+}
diff --git a/third_party/rust/metal/examples/compute/main.rs b/third_party/rust/metal/examples/compute/main.rs
new file mode 100644
index 0000000000..6497c790ae
--- /dev/null
+++ b/third_party/rust/metal/examples/compute/main.rs
@@ -0,0 +1,91 @@
+// Copyright 2017 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use metal::*;
+use objc::rc::autoreleasepool;
+use std::mem;
+
+fn main() {
+    autoreleasepool(|| {
+        let device = Device::system_default().expect("no device found");
+        let command_queue = device.new_command_queue();
+
+        let data = [
+            1u32, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
+            24, 25, 26, 27, 28, 29, 30,
+        ];
+
+        let buffer = device.new_buffer_with_data(
+            unsafe { mem::transmute(data.as_ptr()) },
+            (data.len() * mem::size_of::<u32>()) as u64,
+            MTLResourceOptions::CPUCacheModeDefaultCache,
+        );
+
+        let sum = {
+            let data = [0u32];
+            device.new_buffer_with_data(
+                unsafe { mem::transmute(data.as_ptr()) },
+                (data.len() * mem::size_of::<u32>()) as u64,
+                MTLResourceOptions::CPUCacheModeDefaultCache,
+            )
+        };
+
+        let command_buffer = command_queue.new_command_buffer();
+
+        command_buffer.set_label("label");
+        let block = block::ConcreteBlock::new(move |buffer: &metal::CommandBufferRef| {
+            println!("{}", buffer.label());
+        })
+        .copy();
+
+        command_buffer.add_completed_handler(&block);
+
+        let encoder = command_buffer.new_compute_command_encoder();
+        let library_path = std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR"))
+            .join("examples/compute/shaders.metallib");
+
+        let library = device.new_library_with_file(library_path).unwrap();
+        let kernel = library.get_function("sum", None).unwrap();
+
+        let pipeline_state_descriptor = ComputePipelineDescriptor::new();
+        pipeline_state_descriptor.set_compute_function(Some(&kernel));
+
+        let pipeline_state = device
+            .new_compute_pipeline_state_with_function(
+                pipeline_state_descriptor.compute_function().unwrap(),
+            )
+            .unwrap();
+
+        encoder.set_compute_pipeline_state(&pipeline_state);
+        encoder.set_buffer(0, Some(&buffer), 0);
+        encoder.set_buffer(1, Some(&sum), 0);
+
+        let width = 16;
+
+        let thread_group_count = MTLSize {
+            width,
+            height: 1,
+            depth: 1,
+        };
+
+        let thread_group_size = MTLSize {
+            width: (data.len() as u64 + width) / width,
+            height: 1,
+            depth: 1,
+        };
+
+        encoder.dispatch_thread_groups(thread_group_count, thread_group_size);
+        encoder.end_encoding();
+        command_buffer.commit();
+        command_buffer.wait_until_completed();
+
+        let ptr = sum.contents() as *mut u32;
+        unsafe {
+            assert_eq!(465, *ptr);
+        }
+    });
+}
diff --git a/third_party/rust/metal/examples/compute/shaders.metal b/third_party/rust/metal/examples/compute/shaders.metal
new file mode 100644
index 0000000000..51363a1d36
--- /dev/null
+++ b/third_party/rust/metal/examples/compute/shaders.metal
@@ -0,0 +1,10 @@
+#include <metal_stdlib>
+
+using namespace metal;
+
+kernel void sum(device uint *data [[ buffer(0) ]],
+                volatile device atomic_uint *sum [[ buffer(1) ]],
+                uint gid [[ thread_position_in_grid ]])
+{
+    atomic_fetch_add_explicit(sum, data[gid], memory_order_relaxed);
+}
diff --git a/third_party/rust/metal/examples/compute/shaders.metallib b/third_party/rust/metal/examples/compute/shaders.metallib
new file mode 100644
index 0000000000..af7cb17240
--- /dev/null
+++ b/third_party/rust/metal/examples/compute/shaders.metallib
diff --git a/third_party/rust/metal/examples/events/main.rs b/third_party/rust/metal/examples/events/main.rs
new file mode 100644
index 0000000000..9e4fe0e820
--- /dev/null
+++ b/third_party/rust/metal/examples/events/main.rs
@@ -0,0 +1,50 @@
+// Copyright 2020 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use dispatch::{Queue, QueueAttribute};
+use metal::*;
+
+/// This example replicates `Synchronizing Events Between a GPU and the CPU` article.
+/// See https://developer.apple.com/documentation/metal/synchronization/synchronizing_events_between_a_gpu_and_the_cpu
+fn main() {
+    let device = Device::system_default().expect("No device found");
+
+    let command_queue = device.new_command_queue();
+    let command_buffer = command_queue.new_command_buffer();
+
+    // Shareable event
+    let shared_event = device.new_shared_event();
+
+    // Shareable event listener
+    let my_queue = Queue::create(
+        "com.example.apple-samplecode.MyQueue",
+        QueueAttribute::Serial,
+    );
+
+    // Enable `dispatch` feature to use dispatch queues,
+    // otherwise unsafe `from_queue_handle` is available for use with native APIs.
+    let shared_event_listener = SharedEventListener::from_queue(&my_queue);
+
+    // Register CPU work
+    let notify_block = block::ConcreteBlock::new(move |evt: &SharedEventRef, val: u64| {
+        println!("Got notification from GPU: {}", val);
+        evt.set_signaled_value(3);
+    });
+
+    shared_event.notify(&shared_event_listener, 2, notify_block.copy());
+
+    // Encode GPU work
+    command_buffer.encode_signal_event(&shared_event, 1);
+    command_buffer.encode_signal_event(&shared_event, 2);
+    command_buffer.encode_wait_for_event(&shared_event, 3);
+
+    command_buffer.commit();
+
+    command_buffer.wait_until_completed();
+
+    println!("Done");
+}
diff --git a/third_party/rust/metal/examples/fence/main.rs b/third_party/rust/metal/examples/fence/main.rs
new file mode 100644
index 0000000000..53515d39f5
--- /dev/null
+++ b/third_party/rust/metal/examples/fence/main.rs
@@ -0,0 +1,30 @@
+// Copyright 2020 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use metal::*;
+
+fn main() {
+    let device = Device::system_default().expect("No device found");
+
+    let command_queue = device.new_command_queue();
+    let command_buffer = command_queue.new_command_buffer();
+
+    let fence = device.new_fence();
+
+    let blit_encoder = command_buffer.new_blit_command_encoder();
+    blit_encoder.update_fence(&fence);
+    blit_encoder.end_encoding();
+
+    let compute_encoder = command_buffer.new_compute_command_encoder();
+    compute_encoder.wait_for_fence(&fence);
+    compute_encoder.end_encoding();
+
+    command_buffer.commit();
+    command_buffer.wait_until_completed();
+
+    println!("Done");
+}
diff --git a/third_party/rust/metal/examples/headless-render/README.md b/third_party/rust/metal/examples/headless-render/README.md
new file mode 100644
index 0000000000..6bc434b44a
--- /dev/null
+++ b/third_party/rust/metal/examples/headless-render/README.md
@@ -0,0 +1,11 @@
+## headless-render
+
+Renders the triangle from the [window example](../window) headlessly and then writes it to a PNG file.
+
+![Screenshot of the final render](./screenshot.png)
+
+## To Run
+
+```
+cargo run --example headless-render
+```
diff --git a/third_party/rust/metal/examples/headless-render/main.rs b/third_party/rust/metal/examples/headless-render/main.rs
new file mode 100644
index 0000000000..ed68da1a53
--- /dev/null
+++ b/third_party/rust/metal/examples/headless-render/main.rs
@@ -0,0 +1,159 @@
+use std::mem;
+use std::path::PathBuf;
+
+use std::fs::File;
+use std::io::BufWriter;
+
+use metal::{
+    Buffer, Device, DeviceRef, LibraryRef, MTLClearColor, MTLLoadAction, MTLOrigin, MTLPixelFormat,
+    MTLPrimitiveType, MTLRegion, MTLResourceOptions, MTLSize, MTLStoreAction, RenderPassDescriptor,
+    RenderPassDescriptorRef, RenderPipelineDescriptor, RenderPipelineState, Texture,
+    TextureDescriptor, TextureRef,
+};
+use png::ColorType;
+
+const VIEW_WIDTH: u64 = 512;
+const VIEW_HEIGHT: u64 = 512;
+const TOTAL_BYTES: usize = (VIEW_WIDTH * VIEW_HEIGHT * 4) as usize;
+
+const VERTEX_SHADER: &'static str = "triangle_vertex";
+const FRAGMENT_SHADER: &'static str = "triangle_fragment";
+
+// [2 bytes position, 3 bytes color] * 3
+#[rustfmt::skip]
+const VERTEX_ATTRIBS: [f32; 15] = [
+    0.0, 0.5, 1.0, 0.0, 0.0,
+    -0.5, -0.5, 0.0, 1.0, 0.0,
+    0.5, -0.5, 0.0, 0.0, 1.0,
+];
+
+/// This example shows how to render headlessly by:
+///
+/// 1. Rendering a triangle to an MtlDrawable
+///
+/// 2. Waiting for the render to complete and the color texture to be synchronized with the CPU
+///    by using a blit command encoder
+///
+/// 3. Reading the texture bytes from the MtlTexture
+///
+/// 4. Saving the texture to a PNG file
+fn main() {
+    let device = Device::system_default().expect("No device found");
+
+    let texture = create_texture(&device);
+
+    let library_path = std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR"))
+        .join("examples/window/shaders.metallib");
+
+    let library = device.new_library_with_file(library_path).unwrap();
+
+    let pipeline_state = prepare_pipeline_state(&device, &library);
+
+    let command_queue = device.new_command_queue();
+
+    let vertex_buffer = create_vertex_buffer(&device);
+
+    let render_pass_descriptor = RenderPassDescriptor::new();
+    initialize_color_attachment(&render_pass_descriptor, &texture);
+
+    let command_buffer = command_queue.new_command_buffer();
+    let rc_encoder = command_buffer.new_render_command_encoder(&render_pass_descriptor);
+    rc_encoder.set_render_pipeline_state(&pipeline_state);
+    rc_encoder.set_vertex_buffer(0, Some(&vertex_buffer), 0);
+    rc_encoder.draw_primitives(MTLPrimitiveType::Triangle, 0, 3);
+    rc_encoder.end_encoding();
+
+    render_pass_descriptor
+        .color_attachments()
+        .object_at(0)
+        .unwrap()
+        .set_load_action(MTLLoadAction::DontCare);
+
+    let blit_encoder = command_buffer.new_blit_command_encoder();
+    blit_encoder.synchronize_resource(&texture);
+    blit_encoder.end_encoding();
+
+    command_buffer.commit();
+
+    command_buffer.wait_until_completed();
+
+    save_image(&texture);
+}
+
+fn save_image(texture: &TextureRef) {
+    let mut image = vec![0; TOTAL_BYTES];
+
+    texture.get_bytes(
+        image.as_mut_ptr() as *mut std::ffi::c_void,
+        VIEW_WIDTH * 4,
+        MTLRegion {
+            origin: MTLOrigin { x: 0, y: 0, z: 0 },
+            size: MTLSize {
+                width: VIEW_WIDTH,
+                height: VIEW_HEIGHT,
+                depth: 1,
+            },
+        },
+        0,
+    );
+
+    let out_file =
+        PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("examples/headless-render/out.png");
+    let file = File::create(&out_file).unwrap();
+    let ref mut w = BufWriter::new(file);
+
+    let mut encoder = png::Encoder::new(w, VIEW_WIDTH as u32, VIEW_HEIGHT as u32);
+    encoder.set_color(ColorType::RGBA);
+    encoder.set_depth(png::BitDepth::Eight);
+    let mut writer = encoder.write_header().unwrap();
+
+    writer.write_image_data(&image).unwrap();
+
+    println!("Image saved to {:?}", out_file);
+}
+
+fn create_texture(device: &Device) -> Texture {
+    let texture = TextureDescriptor::new();
+    texture.set_width(VIEW_WIDTH);
+    texture.set_height(VIEW_HEIGHT);
+    texture.set_pixel_format(MTLPixelFormat::RGBA8Unorm);
+
+    device.new_texture(&texture)
+}
+
+fn prepare_pipeline_state(device: &DeviceRef, library: &LibraryRef) -> RenderPipelineState {
+    let vert = library.get_function(VERTEX_SHADER, None).unwrap();
+    let frag = library.get_function(FRAGMENT_SHADER, None).unwrap();
+
+    let pipeline_state_descriptor = RenderPipelineDescriptor::new();
+
+    pipeline_state_descriptor.set_vertex_function(Some(&vert));
+    pipeline_state_descriptor.set_fragment_function(Some(&frag));
+
+    pipeline_state_descriptor
+        .color_attachments()
+        .object_at(0)
+        .unwrap()
+        .set_pixel_format(MTLPixelFormat::RGBA8Unorm);
+
+    device
+        .new_render_pipeline_state(&pipeline_state_descriptor)
+        .unwrap()
+}
+
+fn create_vertex_buffer(device: &DeviceRef) -> Buffer {
+    device.new_buffer_with_data(
+        VERTEX_ATTRIBS.as_ptr() as *const _,
+        (VERTEX_ATTRIBS.len() * mem::size_of::<f32>()) as u64,
+        MTLResourceOptions::CPUCacheModeDefaultCache | MTLResourceOptions::StorageModeManaged,
+    )
+}
+
+fn initialize_color_attachment(descriptor: &RenderPassDescriptorRef, texture: &TextureRef) {
+    let color_attachment = descriptor.color_attachments().object_at(0).unwrap();
+
+    color_attachment.set_texture(Some(texture));
+    color_attachment.set_load_action(MTLLoadAction::Clear);
+    color_attachment.set_clear_color(MTLClearColor::new(0.5, 0.2, 0.2, 1.0));
+    color_attachment.set_store_action(MTLStoreAction::Store);
+}
diff --git a/third_party/rust/metal/examples/headless-render/screenshot.png b/third_party/rust/metal/examples/headless-render/screenshot.png
new file mode 100644
index 0000000000..2af9c5895f
--- /dev/null
+++ b/third_party/rust/metal/examples/headless-render/screenshot.png
diff --git a/third_party/rust/metal/examples/library/main.rs b/third_party/rust/metal/examples/library/main.rs
new file mode 100644
index 0000000000..7223db89c1
--- /dev/null
+++ b/third_party/rust/metal/examples/library/main.rs
@@ -0,0 +1,17 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use metal::*;
+
+const PROGRAM: &'static str = "";
+
+fn main() {
+    let device = Device::system_default().expect("no device found");
+
+    let options = CompileOptions::new();
+    let _library = device.new_library_with_source(PROGRAM, &options);
+}
diff --git a/third_party/rust/metal/examples/mps/main.rs b/third_party/rust/metal/examples/mps/main.rs
new file mode 100644
index 0000000000..efff9f4eba
--- /dev/null
+++ b/third_party/rust/metal/examples/mps/main.rs
@@ -0,0 +1,147 @@
+use metal::*;
+use std::ffi::c_void;
+use std::mem;
+
+#[repr(C)]
+struct Vertex {
+    xyz: [f32; 3],
+}
+
+type Ray = MPSRayOriginMinDistanceDirectionMaxDistance;
+type Intersection = MPSIntersectionDistancePrimitiveIndexCoordinates;
+
+// Original example taken from https://sergeyreznik.github.io/metal-ray-tracer/part-1/index.html
+fn main() {
+    let device = Device::system_default().expect("No device found");
+
+    let library_path =
+        std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("examples/mps/shaders.metallib");
+    let library = device
+        .new_library_with_file(library_path)
+        .expect("Failed to load shader library");
+
+    let generate_rays_pipeline = create_pipeline("generateRays", &library, &device);
+
+    let queue = device.new_command_queue();
+    let command_buffer = queue.new_command_buffer();
+
+    // Simple vertex/index buffer data
+
+    let vertices: [Vertex; 3] = [
+        Vertex {
+            xyz: [0.25, 0.25, 0.0],
+        },
+        Vertex {
+            xyz: [0.75, 0.25, 0.0],
+        },
+        Vertex {
+            xyz: [0.50, 0.75, 0.0],
+        },
+    ];
+
+    let vertex_stride = mem::size_of::<Vertex>();
+
+    let indices: [u32; 3] = [0, 1, 2];
+
+    // Vertex data should be stored in private or managed buffers on discrete GPU systems (AMD, NVIDIA).
+    // Private buffers are stored entirely in GPU memory and cannot be accessed by the CPU. Managed
+    // buffers maintain a copy in CPU memory and a copy in GPU memory.
+    let buffer_opts = MTLResourceOptions::StorageModeManaged;
+
+    let vertex_buffer = device.new_buffer_with_data(
+        vertices.as_ptr() as *const c_void,
+        (vertex_stride * vertices.len()) as u64,
+        buffer_opts,
+    );
+
+    let index_buffer = device.new_buffer_with_data(
+        indices.as_ptr() as *const c_void,
+        (mem::size_of::<u32>() * indices.len()) as u64,
+        buffer_opts,
+    );
+
+    // Build an acceleration structure using our vertex and index buffers containing the single triangle.
+    let acceleration_structure = TriangleAccelerationStructure::from_device(&device)
+        .expect("Failed to create acceleration structure");
+
+    acceleration_structure.set_vertex_buffer(Some(&vertex_buffer));
+    acceleration_structure.set_vertex_stride(vertex_stride as u64);
+    acceleration_structure.set_index_buffer(Some(&index_buffer));
+    acceleration_structure.set_index_type(MPSDataType::UInt32);
+    acceleration_structure.set_triangle_count(1);
+    acceleration_structure.set_usage(MPSAccelerationStructureUsage::None);
+    acceleration_structure.rebuild();
+
+    let ray_intersector =
+        RayIntersector::from_device(&device).expect("Failed to create ray intersector");
+
+    ray_intersector.set_ray_stride(mem::size_of::<Ray>() as u64);
+    ray_intersector.set_ray_data_type(MPSRayDataType::OriginMinDistanceDirectionMaxDistance);
+    ray_intersector.set_intersection_stride(mem::size_of::<Intersection>() as u64);
+    ray_intersector
+        .set_intersection_data_type(MPSIntersectionDataType::DistancePrimitiveIndexCoordinates);
+
+    // Create a buffer to hold generated rays and intersection results
+    let ray_count = 1024;
+    let ray_buffer = device.new_buffer(
+        (mem::size_of::<Ray>() * ray_count) as u64,
+        MTLResourceOptions::StorageModePrivate,
+    );
+
+    let intersection_buffer = device.new_buffer(
+        (mem::size_of::<Intersection>() * ray_count) as u64,
+        MTLResourceOptions::StorageModePrivate,
+    );
+
+    // Run the compute shader to generate rays
+    let encoder = command_buffer.new_compute_command_encoder();
+    encoder.set_buffer(0, Some(&ray_buffer), 0);
+    encoder.set_compute_pipeline_state(&generate_rays_pipeline);
+    encoder.dispatch_thread_groups(
+        MTLSize {
+            width: 4,
+            height: 4,
+            depth: 1,
+        },
+        MTLSize {
+            width: 8,
+            height: 8,
+            depth: 1,
+        },
+    );
+    encoder.end_encoding();
+
+    // Intersect rays with triangles inside acceleration structure
+    ray_intersector.encode_intersection_to_command_buffer(
+        &command_buffer,
+        MPSIntersectionType::Nearest,
+        &ray_buffer,
+        0,
+        &intersection_buffer,
+        0,
+        ray_count as u64,
+        &acceleration_structure,
+    );
+
+    command_buffer.commit();
+    command_buffer.wait_until_completed();
+
+    println!("Done");
+}
+
+fn create_pipeline(func: &str, library: &LibraryRef, device: &DeviceRef) -> ComputePipelineState {
+    // Create compute pipelines will will execute code on the GPU
+    let compute_descriptor = ComputePipelineDescriptor::new();
+
+    // Set to YES to allow compiler to make certain optimizations
+    compute_descriptor.set_thread_group_size_is_multiple_of_thread_execution_width(true);
+
+    let function = library.get_function(func, None).unwrap();
+    compute_descriptor.set_compute_function(Some(&function));
+
+    let pipeline = device
+        .new_compute_pipeline_state(&compute_descriptor)
+        .unwrap();
+
+    pipeline
+}
diff --git a/third_party/rust/metal/examples/mps/shaders.metal b/third_party/rust/metal/examples/mps/shaders.metal
new file mode 100644
index 0000000000..d824d70d1b
--- /dev/null
+++ b/third_party/rust/metal/examples/mps/shaders.metal
@@ -0,0 +1,26 @@
+//
+//  Created by Sergey Reznik on 9/15/18.
+//  Copyright © 2018 Serhii Rieznik. All rights reserved.
+//
+
+// Taken from https://github.com/sergeyreznik/metal-ray-tracer/tree/part-1/source/Shaders
+// MIT License https://github.com/sergeyreznik/metal-ray-tracer/blob/part-1/LICENSE
+
+#include <MetalPerformanceShaders/MetalPerformanceShaders.h>
+
+using Ray = MPSRayOriginMinDistanceDirectionMaxDistance;
+using Intersection = MPSIntersectionDistancePrimitiveIndexCoordinates;
+
+kernel void generateRays(
+    device Ray* rays [[buffer(0)]],
+    uint2 coordinates [[thread_position_in_grid]],
+    uint2 size [[threads_per_grid]])
+{
+    float2 uv = float2(coordinates) / float2(size - 1);
+
+    uint rayIndex = coordinates.x + coordinates.y * size.x;
+    rays[rayIndex].origin = MPSPackedFloat3(uv.x, uv.y, -1.0);
+    rays[rayIndex].direction = MPSPackedFloat3(0.0, 0.0, 1.0);
+    rays[rayIndex].minDistance = 0.0f;
+    rays[rayIndex].maxDistance = 2.0f;
+}
diff --git a/third_party/rust/metal/examples/mps/shaders.metallib b/third_party/rust/metal/examples/mps/shaders.metallib
new file mode 100644
index 0000000000..2cecf7b837
--- /dev/null
+++ b/third_party/rust/metal/examples/mps/shaders.metallib
diff --git a/third_party/rust/metal/examples/reflection/main.rs b/third_party/rust/metal/examples/reflection/main.rs
new file mode 100644
index 0000000000..efe9fc2994
--- /dev/null
+++ b/third_party/rust/metal/examples/reflection/main.rs
@@ -0,0 +1,75 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use metal::*;
+use objc::rc::autoreleasepool;
+
+const PROGRAM: &'static str = "
+    #include <metal_stdlib>\n\
+
+    using namespace metal;\n\
+
+    typedef struct {\n\
+        float2 position;\n\
+        float3 color;\n\
+    } vertex_t;\n\
+
+    struct ColorInOut {\n\
+        float4 position [[position]];\n\
+        float4 color;\n\
+    };\n\
+
+    vertex ColorInOut vs(device vertex_t* vertex_array [[ buffer(0) ]],\n\
+                                      unsigned int vid [[ vertex_id ]])\n\
+    {\n\
+        ColorInOut out;\n\
+
+        out.position = float4(float2(vertex_array[vid].position), 0.0, 1.0);\n\
+        out.color = float4(float3(vertex_array[vid].color), 1.0);\n\
+
+        return out;\n\
+    }\n\
+
+    fragment float4 ps(ColorInOut in [[stage_in]])\n\
+    {\n\
+        return in.color;\n\
+    };\n\
+";
+
+fn main() {
+    autoreleasepool(|| {
+        let device = Device::system_default().expect("no device found");
+
+        let options = CompileOptions::new();
+        let library = device.new_library_with_source(PROGRAM, &options).unwrap();
+        let (vs, ps) = (
+            library.get_function("vs", None).unwrap(),
+            library.get_function("ps", None).unwrap(),
+        );
+
+        let vertex_desc = VertexDescriptor::new();
+
+        let desc = RenderPipelineDescriptor::new();
+        desc.set_vertex_function(Some(&vs));
+        desc.set_fragment_function(Some(&ps));
+        desc.set_vertex_descriptor(Some(vertex_desc));
+
+        println!("{:?}", desc);
+
+        let reflect_options = MTLPipelineOption::ArgumentInfo | MTLPipelineOption::BufferTypeInfo;
+        let (_, reflection) = device
+            .new_render_pipeline_state_with_reflection(&desc, reflect_options)
+            .unwrap();
+
+        println!("Vertex arguments: ");
+        let vertex_arguments = reflection.vertex_arguments();
+        for index in 0..vertex_arguments.count() {
+            let argument = vertex_arguments.object_at(index).unwrap();
+            println!("{:?}", argument);
+        }
+    });
+}
diff --git a/third_party/rust/metal/examples/shader-dylib/main.rs b/third_party/rust/metal/examples/shader-dylib/main.rs
new file mode 100644
index 0000000000..b713e20e06
--- /dev/null
+++ b/third_party/rust/metal/examples/shader-dylib/main.rs
@@ -0,0 +1,177 @@
+use cocoa::{appkit::NSView, base::id as cocoa_id};
+use core_graphics_types::geometry::CGSize;
+
+use metal::*;
+use objc::{rc::autoreleasepool, runtime::YES};
+
+use winit::{
+    event::{Event, WindowEvent},
+    event_loop::ControlFlow,
+    platform::macos::WindowExtMacOS,
+};
+
+use std::mem;
+
+struct App {
+    pub device: Device,
+    pub command_queue: CommandQueue,
+    pub layer: MetalLayer,
+    pub image_fill_cps: ComputePipelineState,
+    pub width: u32,
+    pub height: u32,
+}
+
+fn select_device() -> Option<Device> {
+    let devices = Device::all();
+    for device in devices {
+        if device.supports_dynamic_libraries() {
+            return Some(device);
+        }
+    }
+
+    None
+}
+
+impl App {
+    fn new(window: &winit::window::Window) -> Self {
+        let device = select_device().expect("no device found that supports dynamic libraries");
+        let command_queue = device.new_command_queue();
+
+        let layer = MetalLayer::new();
+        layer.set_device(&device);
+        layer.set_pixel_format(MTLPixelFormat::BGRA8Unorm);
+        layer.set_presents_with_transaction(false);
+        layer.set_framebuffer_only(false);
+        unsafe {
+            let view = window.ns_view() as cocoa_id;
+            view.setWantsLayer(YES);
+            view.setLayer(mem::transmute(layer.as_ref()));
+        }
+        let draw_size = window.inner_size();
+        layer.set_drawable_size(CGSize::new(draw_size.width as f64, draw_size.height as f64));
+
+        // compile dynamic lib shader
+        let dylib_src_path = std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR"))
+            .join("examples/shader-dylib/test_dylib.metal");
+        let install_path =
+            std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("target/test_dylib.metallib");
+
+        let dylib_src = std::fs::read_to_string(dylib_src_path).expect("bad shit");
+        let opts = metal::CompileOptions::new();
+        opts.set_library_type(MTLLibraryType::Dynamic);
+        opts.set_install_name(install_path.to_str().unwrap());
+
+        let lib = device
+            .new_library_with_source(dylib_src.as_str(), &opts)
+            .unwrap();
+
+        // create dylib
+        let dylib = device.new_dynamic_library(&lib).unwrap();
+        dylib.set_label("test_dylib");
+
+        // optional: serialize binary blob that can be loaded later
+        let blob_url = String::from("file://") + install_path.to_str().unwrap();
+        let url = URL::new_with_string(&blob_url);
+        dylib.serialize_to_url(&url).unwrap();
+
+        // create shader that links with dylib
+        let shader_src_path = std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR"))
+            .join("examples/shader-dylib/test_shader.metal");
+
+        let shader_src = std::fs::read_to_string(shader_src_path).expect("bad shit");
+        let opts = metal::CompileOptions::new();
+        // add dynamic library to link with
+        let libraries = [dylib.as_ref()];
+        opts.set_libraries(&libraries);
+
+        // compile
+        let shader_lib = device
+            .new_library_with_source(shader_src.as_str(), &opts)
+            .unwrap();
+
+        let func = shader_lib.get_function("test_kernel", None).unwrap();
+
+        // create pipeline state
+        // linking occurs here
+        let image_fill_cps = device
+            .new_compute_pipeline_state_with_function(&func)
+            .unwrap();
+
+        Self {
+            device,
+            command_queue,
+            layer,
+            image_fill_cps,
+            width: draw_size.width,
+            height: draw_size.height,
+        }
+    }
+
+    fn resize(&mut self, width: u32, height: u32) {
+        self.layer
+            .set_drawable_size(CGSize::new(width as f64, height as f64));
+        self.width = width;
+        self.height = height;
+    }
+
+    fn draw(&self) {
+        let drawable = match self.layer.next_drawable() {
+            Some(drawable) => drawable,
+            None => return,
+        };
+
+        let w = self.image_fill_cps.thread_execution_width();
+        let h = self.image_fill_cps.max_total_threads_per_threadgroup() / w;
+        let threads_per_threadgroup = MTLSize::new(w, h, 1);
+        let threads_per_grid = MTLSize::new(self.width as _, self.height as _, 1);
+
+        let command_buffer = self.command_queue.new_command_buffer();
+
+        {
+            let encoder = command_buffer.new_compute_command_encoder();
+            encoder.set_compute_pipeline_state(&self.image_fill_cps);
+            encoder.set_texture(0, Some(&drawable.texture()));
+            encoder.dispatch_threads(threads_per_grid, threads_per_threadgroup);
+            encoder.end_encoding();
+        }
+
+        command_buffer.present_drawable(&drawable);
+        command_buffer.commit();
+    }
+}
+
+fn main() {
+    let events_loop = winit::event_loop::EventLoop::new();
+    let size = winit::dpi::LogicalSize::new(800, 600);
+
+    let window = winit::window::WindowBuilder::new()
+        .with_inner_size(size)
+        .with_title("Metal Shader Dylib Example".to_string())
+        .build(&events_loop)
+        .unwrap();
+
+    let mut app = App::new(&window);
+
+    events_loop.run(move |event, _, control_flow| {
+        autoreleasepool(|| {
+            *control_flow = ControlFlow::Poll;
+
+            match event {
+                Event::WindowEvent { event, .. } => match event {
+                    WindowEvent::CloseRequested => *control_flow = ControlFlow::Exit,
+                    WindowEvent::Resized(size) => {
+                        app.resize(size.width, size.height);
+                    }
+                    _ => (),
+                },
+                Event::MainEventsCleared => {
+                    window.request_redraw();
+                }
+                Event::RedrawRequested(_) => {
+                    app.draw();
+                }
+                _ => {}
+            }
+        });
+    });
+}
diff --git a/third_party/rust/metal/examples/shader-dylib/test_dylib.metal b/third_party/rust/metal/examples/shader-dylib/test_dylib.metal
new file mode 100644
index 0000000000..5faa4a803a
--- /dev/null
+++ b/third_party/rust/metal/examples/shader-dylib/test_dylib.metal
@@ -0,0 +1,8 @@
+#include <metal_stdlib>
+
+using namespace metal;
+
+float4 get_color_test(float4 inColor)
+{
+    return float4(inColor.r, inColor.g, inColor.b, 0);
+}
diff --git a/third_party/rust/metal/examples/shader-dylib/test_shader.metal b/third_party/rust/metal/examples/shader-dylib/test_shader.metal
new file mode 100644
index 0000000000..38203a64a5
--- /dev/null
+++ b/third_party/rust/metal/examples/shader-dylib/test_shader.metal
@@ -0,0 +1,14 @@
+#include <metal_stdlib>
+
+using namespace metal;
+
+extern float4 get_color_test(float4 inColor);
+
+kernel void test_kernel(
+    texture2d<float, access::write> image [[texture(0)]],
+    uint2 coordinates [[thread_position_in_grid]],
+    uint2 size [[threads_per_grid]])
+{
+    float2 uv = float2(coordinates) / float2(size - 1);
+    image.write(get_color_test(float4(uv, 0.0, 1.0)), coordinates);
+}
diff --git a/third_party/rust/metal/examples/window/README.md b/third_party/rust/metal/examples/window/README.md
new file mode 100644
index 0000000000..62233be356
--- /dev/null
+++ b/third_party/rust/metal/examples/window/README.md
@@ -0,0 +1,11 @@
+## window
+
+Renders a spinning triangle to a [winit](https://github.com/rust-windowing/winit) window.
+
+![Screenshot of the final render](./screenshot.png)
+
+## To Run
+
+```
+cargo run --example window
+```
diff --git a/third_party/rust/metal/examples/window/main.rs b/third_party/rust/metal/examples/window/main.rs
new file mode 100644
index 0000000000..08936e82fc
--- /dev/null
+++ b/third_party/rust/metal/examples/window/main.rs
@@ -0,0 +1,261 @@
+// Copyright 2016 metal-rs developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+extern crate objc;
+
+use cocoa::{appkit::NSView, base::id as cocoa_id};
+use core_graphics_types::geometry::CGSize;
+
+use metal::*;
+use objc::{rc::autoreleasepool, runtime::YES};
+use std::mem;
+use winit::platform::macos::WindowExtMacOS;
+
+use winit::{
+    event::{Event, WindowEvent},
+    event_loop::ControlFlow,
+};
+
+#[repr(C)]
+struct Rect {
+    pub x: f32,
+    pub y: f32,
+    pub w: f32,
+    pub h: f32,
+}
+
+#[repr(C)]
+struct Color {
+    pub r: f32,
+    pub g: f32,
+    pub b: f32,
+    pub a: f32,
+}
+
+#[repr(C)]
+struct ClearRect {
+    pub rect: Rect,
+    pub color: Color,
+}
+
+fn prepare_pipeline_state<'a>(
+    device: &DeviceRef,
+    library: &LibraryRef,
+    vertex_shader: &str,
+    fragment_shader: &str,
+) -> RenderPipelineState {
+    let vert = library.get_function(vertex_shader, None).unwrap();
+    let frag = library.get_function(fragment_shader, None).unwrap();
+
+    let pipeline_state_descriptor = RenderPipelineDescriptor::new();
+    pipeline_state_descriptor.set_vertex_function(Some(&vert));
+    pipeline_state_descriptor.set_fragment_function(Some(&frag));
+    let attachment = pipeline_state_descriptor
+        .color_attachments()
+        .object_at(0)
+        .unwrap();
+    attachment.set_pixel_format(MTLPixelFormat::BGRA8Unorm);
+
+    attachment.set_blending_enabled(true);
+    attachment.set_rgb_blend_operation(metal::MTLBlendOperation::Add);
+    attachment.set_alpha_blend_operation(metal::MTLBlendOperation::Add);
+    attachment.set_source_rgb_blend_factor(metal::MTLBlendFactor::SourceAlpha);
+    attachment.set_source_alpha_blend_factor(metal::MTLBlendFactor::SourceAlpha);
+    attachment.set_destination_rgb_blend_factor(metal::MTLBlendFactor::OneMinusSourceAlpha);
+    attachment.set_destination_alpha_blend_factor(metal::MTLBlendFactor::OneMinusSourceAlpha);
+
+    device
+        .new_render_pipeline_state(&pipeline_state_descriptor)
+        .unwrap()
+}
+
+fn prepare_render_pass_descriptor(descriptor: &RenderPassDescriptorRef, texture: &TextureRef) {
+    //descriptor.color_attachments().set_object_at(0, MTLRenderPassColorAttachmentDescriptor::alloc());
+    //let color_attachment: MTLRenderPassColorAttachmentDescriptor = unsafe { msg_send![descriptor.color_attachments().0, _descriptorAtIndex:0] };//descriptor.color_attachments().object_at(0);
+    let color_attachment = descriptor.color_attachments().object_at(0).unwrap();
+
+    color_attachment.set_texture(Some(texture));
+    color_attachment.set_load_action(MTLLoadAction::Clear);
+    color_attachment.set_clear_color(MTLClearColor::new(0.2, 0.2, 0.25, 1.0));
+    color_attachment.set_store_action(MTLStoreAction::Store);
+}
+
+fn main() {
+    let events_loop = winit::event_loop::EventLoop::new();
+    let size = winit::dpi::LogicalSize::new(800, 600);
+
+    let window = winit::window::WindowBuilder::new()
+        .with_inner_size(size)
+        .with_title("Metal Window Example".to_string())
+        .build(&events_loop)
+        .unwrap();
+
+    let device = Device::system_default().expect("no device found");
+
+    let layer = MetalLayer::new();
+    layer.set_device(&device);
+    layer.set_pixel_format(MTLPixelFormat::BGRA8Unorm);
+    layer.set_presents_with_transaction(false);
+
+    unsafe {
+        let view = window.ns_view() as cocoa_id;
+        view.setWantsLayer(YES);
+        view.setLayer(mem::transmute(layer.as_ref()));
+    }
+
+    let draw_size = window.inner_size();
+    layer.set_drawable_size(CGSize::new(draw_size.width as f64, draw_size.height as f64));
+
+    let library_path = std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR"))
+        .join("examples/window/shaders.metallib");
+
+    let library = device.new_library_with_file(library_path).unwrap();
+    let triangle_pipeline_state =
+        prepare_pipeline_state(&device, &library, "triangle_vertex", "triangle_fragment");
+    let clear_rect_pipeline_state = prepare_pipeline_state(
+        &device,
+        &library,
+        "clear_rect_vertex",
+        "clear_rect_fragment",
+    );
+
+    let command_queue = device.new_command_queue();
+    //let nc: () = msg_send![command_queue.0, setExecutionEnabled:true];
+
+    let vbuf = {
+        let vertex_data = [
+            0.0f32, 0.5, 1.0, 0.0, 0.0, -0.5, -0.5, 0.0, 1.0, 0.0, 0.5, 0.5, 0.0, 0.0, 1.0,
+        ];
+
+        device.new_buffer_with_data(
+            vertex_data.as_ptr() as *const _,
+            (vertex_data.len() * mem::size_of::<f32>()) as u64,
+            MTLResourceOptions::CPUCacheModeDefaultCache | MTLResourceOptions::StorageModeManaged,
+        )
+    };
+
+    let mut r = 0.0f32;
+
+    let clear_rect = vec![ClearRect {
+        rect: Rect {
+            x: -1.0,
+            y: -1.0,
+            w: 2.0,
+            h: 2.0,
+        },
+        color: Color {
+            r: 0.5,
+            g: 0.8,
+            b: 0.5,
+            a: 1.0,
+        },
+    }];
+
+    let clear_rect_buffer = device.new_buffer_with_data(
+        clear_rect.as_ptr() as *const _,
+        mem::size_of::<ClearRect>() as u64,
+        MTLResourceOptions::CPUCacheModeDefaultCache | MTLResourceOptions::StorageModeManaged,
+    );
+
+    events_loop.run(move |event, _, control_flow| {
+        autoreleasepool(|| {
+            *control_flow = ControlFlow::Poll;
+
+            match event {
+                Event::WindowEvent { event, .. } => match event {
+                    WindowEvent::CloseRequested => *control_flow = ControlFlow::Exit,
+                    WindowEvent::Resized(size) => {
+                        layer.set_drawable_size(CGSize::new(size.width as f64, size.height as f64));
+                    }
+                    _ => (),
+                },
+                Event::MainEventsCleared => {
+                    window.request_redraw();
+                }
+                Event::RedrawRequested(_) => {
+                    let p = vbuf.contents();
+                    let vertex_data = [
+                        0.0f32,
+                        0.5,
+                        1.0,
+                        0.0,
+                        0.0,
+                        -0.5 + (r.cos() / 2. + 0.5),
+                        -0.5,
+                        0.0,
+                        1.0,
+                        0.0,
+                        0.5 - (r.cos() / 2. + 0.5),
+                        -0.5,
+                        0.0,
+                        0.0,
+                        1.0,
+                    ];
+
+                    unsafe {
+                        std::ptr::copy(
+                            vertex_data.as_ptr(),
+                            p as *mut f32,
+                            (vertex_data.len() * mem::size_of::<f32>()) as usize,
+                        );
+                    }
+
+                    vbuf.did_modify_range(crate::NSRange::new(
+                        0 as u64,
+                        (vertex_data.len() * mem::size_of::<f32>()) as u64,
+                    ));
+
+                    let drawable = match layer.next_drawable() {
+                        Some(drawable) => drawable,
+                        None => return,
+                    };
+
+                    let render_pass_descriptor = RenderPassDescriptor::new();
+
+                    prepare_render_pass_descriptor(&render_pass_descriptor, drawable.texture());
+
+                    let command_buffer = command_queue.new_command_buffer();
+                    let encoder =
+                        command_buffer.new_render_command_encoder(&render_pass_descriptor);
+
+                    encoder.set_scissor_rect(MTLScissorRect {
+                        x: 20,
+                        y: 20,
+                        width: 100,
+                        height: 100,
+                    });
+                    encoder.set_render_pipeline_state(&clear_rect_pipeline_state);
+                    encoder.set_vertex_buffer(0, Some(&clear_rect_buffer), 0);
+                    encoder.draw_primitives_instanced(
+                        metal::MTLPrimitiveType::TriangleStrip,
+                        0,
+                        4,
+                        1,
+                    );
+                    let physical_size = window.inner_size();
+                    encoder.set_scissor_rect(MTLScissorRect {
+                        x: 0,
+                        y: 0,
+                        width: physical_size.width as _,
+                        height: physical_size.height as _,
+                    });
+
+                    encoder.set_render_pipeline_state(&triangle_pipeline_state);
+                    encoder.set_vertex_buffer(0, Some(&vbuf), 0);
+                    encoder.draw_primitives(MTLPrimitiveType::Triangle, 0, 3);
+                    encoder.end_encoding();
+
+                    command_buffer.present_drawable(&drawable);
+                    command_buffer.commit();
+
+                    r += 0.01f32;
+                }
+                _ => {}
+            }
+        });
+    });
+}
diff --git a/third_party/rust/metal/examples/window/screenshot.png b/third_party/rust/metal/examples/window/screenshot.png
new file mode 100644
index 0000000000..9f5eba8ccf
--- /dev/null
+++ b/third_party/rust/metal/examples/window/screenshot.png
diff --git a/third_party/rust/metal/examples/window/shaders.metal b/third_party/rust/metal/examples/window/shaders.metal
new file mode 100644
index 0000000000..cc05f5d57e
--- /dev/null
+++ b/third_party/rust/metal/examples/window/shaders.metal
@@ -0,0 +1,97 @@
+#include <metal_stdlib>
+
+using namespace metal;
+
+typedef struct {
+	packed_float2 position;
+	packed_float3 color;
+} vertex_t;
+
+struct ColorInOut {
+    float4 position [[position]];
+    float4 color;
+};
+// vertex shader function
+vertex ColorInOut triangle_vertex(const device vertex_t* vertex_array [[ buffer(0) ]],
+                                   unsigned int vid [[ vertex_id ]])
+{
+    ColorInOut out;
+
+    auto device const &v = vertex_array[vid];
+    out.position = float4(v.position.x, v.position.y, 0.0, 1.0);
+    out.color = float4(v.color.x, v.color.y, v.color.z, 0.2);
+
+    return out;
+}
+
+// fragment shader function
+fragment float4 triangle_fragment(ColorInOut in [[stage_in]])
+{
+    return in.color;
+};
+
+
+struct Rect {
+    float x;
+    float y;
+    float w;
+    float h;
+};
+
+struct Color {
+    float r;
+    float g;
+    float b;
+    float a;
+};
+
+struct ClearRect {
+    Rect rect;
+    Color color;
+};
+
+float2 rect_vert(
+    Rect rect,
+    uint vid
+) {
+    float2 pos;
+
+    float left = rect.x;
+    float right = rect.x + rect.w;
+    float bottom = rect.y;
+    float top = rect.y + rect.h;
+
+    switch (vid) {
+    case 0:
+        pos = float2(right, top);
+        break;
+    case 1:
+        pos = float2(left, top);
+        break;
+    case 2:
+        pos = float2(right, bottom);
+        break;
+    case 3:
+        pos = float2(left, bottom);
+        break;
+    }
+    return pos;
+}
+
+vertex ColorInOut clear_rect_vertex(
+    const device ClearRect *clear_rect [[ buffer(0) ]],
+    unsigned int vid [[ vertex_id ]]
+) {
+    ColorInOut out;
+    float4 pos = float4(rect_vert(clear_rect->rect, vid), 0, 1);
+    auto col = clear_rect->color;
+
+    out.position = pos;
+    out.color = float4(col.r, col.g, col.b, col.a);
+    return out;
+}
+
+fragment float4 clear_rect_fragment(ColorInOut in [[stage_in]])
+{
+    return in.color;
+};
diff --git a/third_party/rust/metal/examples/window/shaders.metallib b/third_party/rust/metal/examples/window/shaders.metallib
new file mode 100644
index 0000000000..a6388fc9bc
--- /dev/null
+++ b/third_party/rust/metal/examples/window/shaders.metallib
diff --git a/third_party/rust/metal/src/argument.rs b/third_party/rust/metal/src/argument.rs
new file mode 100644
index 0000000000..1bf5565977
--- /dev/null
+++ b/third_party/rust/metal/src/argument.rs
@@ -0,0 +1,340 @@
+// Copyright 2017 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::{MTLTextureType, NSUInteger};
+use objc::runtime::{NO, YES};
+
+#[repr(u64)]
+#[allow(non_camel_case_types)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLDataType {
+    None = 0,
+
+    Struct = 1,
+    Array = 2,
+
+    Float = 3,
+    Float2 = 4,
+    Float3 = 5,
+    Float4 = 6,
+
+    Float2x2 = 7,
+    Float2x3 = 8,
+    Float2x4 = 9,
+
+    Float3x2 = 10,
+    Float3x3 = 11,
+    Float3x4 = 12,
+
+    Float4x2 = 13,
+    Float4x3 = 14,
+    Float4x4 = 15,
+
+    Half = 16,
+    Half2 = 17,
+    Half3 = 18,
+    Half4 = 19,
+
+    Half2x2 = 20,
+    Half2x3 = 21,
+    Half2x4 = 22,
+
+    Half3x2 = 23,
+    Half3x3 = 24,
+    Half3x4 = 25,
+
+    Half4x2 = 26,
+    Half4x3 = 27,
+    Half4x4 = 28,
+
+    Int = 29,
+    Int2 = 30,
+    Int3 = 31,
+    Int4 = 32,
+
+    UInt = 33,
+    UInt2 = 34,
+    UInt3 = 35,
+    UInt4 = 36,
+
+    Short = 37,
+    Short2 = 38,
+    Short3 = 39,
+    Short4 = 40,
+
+    UShort = 41,
+    UShort2 = 42,
+    UShort3 = 43,
+    UShort4 = 44,
+
+    Char = 45,
+    Char2 = 46,
+    Char3 = 47,
+    Char4 = 48,
+
+    UChar = 49,
+    UChar2 = 50,
+    UChar3 = 51,
+    UChar4 = 52,
+
+    Bool = 53,
+    Bool2 = 54,
+    Bool3 = 55,
+    Bool4 = 56,
+
+    Texture = 58,
+    Sampler = 59,
+    Pointer = 60,
+    R8Unorm = 62,
+    R8Snorm = 63,
+    R16Unorm = 64,
+    R16Snorm = 65,
+    RG8Unorm = 66,
+    RG8Snorm = 67,
+    RG16Unorm = 68,
+    RG16Snorm = 69,
+    RGBA8Unorm = 70,
+    RGBA8Unorm_sRGB = 71,
+    RGBA8Snorm = 72,
+    RGBA16Unorm = 73,
+    RGBA16Snorm = 74,
+    RGB10A2Unorm = 75,
+    RG11B10Float = 76,
+    RGB9E5Float = 77,
+}
+
+#[repr(u64)]
+#[allow(non_camel_case_types)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLArgumentType {
+    Buffer = 0,
+    ThreadgroupMemory = 1,
+    Texture = 2,
+    Sampler = 3,
+    ImageblockData = 16,
+    Imageblock = 17,
+}
+
+#[repr(u64)]
+#[allow(non_camel_case_types)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLArgumentAccess {
+    ReadOnly = 0,
+    ReadWrite = 1,
+    WriteOnly = 2,
+}
+
+pub enum MTLStructMember {}
+
+foreign_obj_type! {
+    type CType = MTLStructMember;
+    pub struct StructMember;
+    pub struct StructMemberRef;
+}
+
+impl StructMemberRef {
+    pub fn name(&self) -> &str {
+        unsafe {
+            let name = msg_send![self, name];
+            crate::nsstring_as_str(name)
+        }
+    }
+
+    pub fn offset(&self) -> NSUInteger {
+        unsafe { msg_send![self, offset] }
+    }
+
+    pub fn data_type(&self) -> MTLDataType {
+        unsafe { msg_send![self, dataType] }
+    }
+
+    pub fn struct_type(&self) -> MTLStructType {
+        unsafe { msg_send![self, structType] }
+    }
+
+    pub fn array_type(&self) -> MTLArrayType {
+        unsafe { msg_send![self, arrayType] }
+    }
+}
+
+pub enum MTLStructMemberArray {}
+
+foreign_obj_type! {
+    type CType = MTLStructMemberArray;
+    pub struct StructMemberArray;
+    pub struct StructMemberArrayRef;
+}
+
+impl StructMemberArrayRef {
+    pub fn object_at(&self, index: NSUInteger) -> Option<&StructMemberRef> {
+        unsafe { msg_send![self, objectAtIndexedSubscript: index] }
+    }
+
+    pub fn count(&self) -> NSUInteger {
+        unsafe { msg_send![self, count] }
+    }
+}
+
+pub enum MTLStructType {}
+
+foreign_obj_type! {
+    type CType = MTLStructType;
+    pub struct StructType;
+    pub struct StructTypeRef;
+}
+
+impl StructTypeRef {
+    pub fn members(&self) -> &StructMemberArrayRef {
+        unsafe { msg_send![self, members] }
+    }
+
+    pub fn member_from_name(&self, name: &str) -> Option<&StructMemberRef> {
+        let nsname = crate::nsstring_from_str(name);
+
+        unsafe { msg_send![self, memberByName: nsname] }
+    }
+}
+
+pub enum MTLArrayType {}
+
+foreign_obj_type! {
+    type CType = MTLArrayType;
+    pub struct ArrayType;
+    pub struct ArrayTypeRef;
+}
+
+impl ArrayTypeRef {
+    pub fn array_length(&self) -> NSUInteger {
+        unsafe { msg_send![self, arrayLength] }
+    }
+
+    pub fn stride(&self) -> NSUInteger {
+        unsafe { msg_send![self, stride] }
+    }
+
+    pub fn element_type(&self) -> MTLDataType {
+        unsafe { msg_send![self, elementType] }
+    }
+
+    pub fn element_struct_type(&self) -> MTLStructType {
+        unsafe { msg_send![self, elementStructType] }
+    }
+
+    pub fn element_array_type(&self) -> MTLArrayType {
+        unsafe { msg_send![self, elementArrayType] }
+    }
+}
+
+pub enum MTLArgument {}
+
+foreign_obj_type! {
+    type CType = MTLArgument;
+    pub struct Argument;
+    pub struct ArgumentRef;
+}
+
+impl ArgumentRef {
+    pub fn name(&self) -> &str {
+        unsafe {
+            let name = msg_send![self, name];
+            crate::nsstring_as_str(name)
+        }
+    }
+
+    pub fn type_(&self) -> MTLArgumentType {
+        unsafe { msg_send![self, type] }
+    }
+
+    pub fn access(&self) -> MTLArgumentAccess {
+        unsafe { msg_send![self, access] }
+    }
+
+    pub fn index(&self) -> NSUInteger {
+        unsafe { msg_send![self, index] }
+    }
+
+    pub fn is_active(&self) -> bool {
+        unsafe {
+            match msg_send![self, isActive] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn buffer_alignment(&self) -> NSUInteger {
+        unsafe { msg_send![self, bufferAlignment] }
+    }
+
+    pub fn buffer_data_size(&self) -> NSUInteger {
+        unsafe { msg_send![self, bufferDataSize] }
+    }
+
+    pub fn buffer_data_type(&self) -> MTLDataType {
+        unsafe { msg_send![self, bufferDataType] }
+    }
+
+    pub fn buffer_struct_type(&self) -> &StructTypeRef {
+        unsafe { msg_send![self, bufferStructType] }
+    }
+
+    pub fn threadgroup_memory_alignment(&self) -> NSUInteger {
+        unsafe { msg_send![self, threadgroupMemoryAlignment] }
+    }
+
+    pub fn threadgroup_memory_data_size(&self) -> NSUInteger {
+        unsafe { msg_send![self, threadgroupMemoryDataSize] }
+    }
+
+    pub fn texture_type(&self) -> MTLTextureType {
+        unsafe { msg_send![self, textureType] }
+    }
+
+    pub fn texture_data_type(&self) -> MTLDataType {
+        unsafe { msg_send![self, textureDataType] }
+    }
+}
+
+pub enum MTLArgumentDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLArgumentDescriptor;
+    pub struct ArgumentDescriptor;
+    pub struct ArgumentDescriptorRef;
+}
+
+impl ArgumentDescriptor {
+    pub fn new<'a>() -> &'a ArgumentDescriptorRef {
+        unsafe {
+            let class = class!(MTLArgumentDescriptor);
+            msg_send![class, argumentDescriptor]
+        }
+    }
+}
+
+impl ArgumentDescriptorRef {
+    pub fn set_data_type(&self, ty: MTLDataType) {
+        unsafe { msg_send![self, setDataType: ty] }
+    }
+
+    pub fn set_index(&self, index: NSUInteger) {
+        unsafe { msg_send![self, setIndex: index] }
+    }
+
+    pub fn set_access(&self, access: MTLArgumentAccess) {
+        unsafe { msg_send![self, setAccess: access] }
+    }
+
+    pub fn set_array_length(&self, length: NSUInteger) {
+        unsafe { msg_send![self, setArrayLength: length] }
+    }
+
+    pub fn set_texture_type(&self, ty: MTLTextureType) {
+        unsafe { msg_send![self, setTextureType: ty] }
+    }
+}
diff --git a/third_party/rust/metal/src/buffer.rs b/third_party/rust/metal/src/buffer.rs
new file mode 100644
index 0000000000..e334c54e50
--- /dev/null
+++ b/third_party/rust/metal/src/buffer.rs
@@ -0,0 +1,67 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+
+pub enum MTLBuffer {}
+
+foreign_obj_type! {
+    type CType = MTLBuffer;
+    pub struct Buffer;
+    pub struct BufferRef;
+    type ParentType = ResourceRef;
+}
+
+impl BufferRef {
+    pub fn length(&self) -> u64 {
+        unsafe { msg_send![self, length] }
+    }
+
+    pub fn contents(&self) -> *mut std::ffi::c_void {
+        unsafe { msg_send![self, contents] }
+    }
+
+    pub fn did_modify_range(&self, range: crate::NSRange) {
+        unsafe { msg_send![self, didModifyRange: range] }
+    }
+
+    pub fn new_texture_with_descriptor(
+        &self,
+        descriptor: &TextureDescriptorRef,
+        offset: u64,
+        bytes_per_row: u64,
+    ) -> Texture {
+        unsafe {
+            msg_send![self,
+                newTextureWithDescriptor:descriptor
+                offset:offset
+                bytesPerRow:bytes_per_row
+            ]
+        }
+    }
+
+    /// Only available on macos(10.15), NOT available on (ios)
+    pub fn remote_storage_buffer(&self) -> &BufferRef {
+        unsafe { msg_send![self, remoteStorageBuffer] }
+    }
+
+    /// Only available on (macos(10.15), NOT available on (ios)
+    pub fn new_remote_buffer_view_for_device(&self, device: &DeviceRef) -> Buffer {
+        unsafe { msg_send![self, newRemoteBufferViewForDevice: device] }
+    }
+
+    pub fn add_debug_marker(&self, name: &str, range: crate::NSRange) {
+        unsafe {
+            let name = crate::nsstring_from_str(name);
+            msg_send![self, addDebugMarker:name range:range]
+        }
+    }
+
+    pub fn remove_all_debug_markers(&self) {
+        unsafe { msg_send![self, removeAllDebugMarkers] }
+    }
+}
diff --git a/third_party/rust/metal/src/capturedescriptor.rs b/third_party/rust/metal/src/capturedescriptor.rs
new file mode 100644
index 0000000000..6f6e369f1a
--- /dev/null
+++ b/third_party/rust/metal/src/capturedescriptor.rs
@@ -0,0 +1,79 @@
+// Copyright 2020 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+
+use std::path::Path;
+
+/// https://developer.apple.com/documentation/metal/mtlcapturedestination?language=objc
+#[repr(u64)]
+#[allow(non_camel_case_types)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLCaptureDestination {
+    DeveloperTools = 1,
+    GpuTraceDocument = 2,
+}
+
+/// https://developer.apple.com/documentation/metal/mtlcapturedescriptor
+pub enum MTLCaptureDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLCaptureDescriptor;
+    pub struct CaptureDescriptor;
+    pub struct CaptureDescriptorRef;
+}
+
+impl CaptureDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLCaptureDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl CaptureDescriptorRef {
+    /// https://developer.apple.com/documentation/metal/mtlcapturedescriptor/3237248-captureobject
+    pub fn set_capture_device(&self, device: &DeviceRef) {
+        unsafe { msg_send![self, setCaptureObject: device] }
+    }
+
+    /// https://developer.apple.com/documentation/metal/mtlcapturedescriptor/3237248-captureobject
+    pub fn set_capture_scope(&self, scope: &CaptureScopeRef) {
+        unsafe { msg_send![self, setCaptureObject: scope] }
+    }
+
+    /// https://developer.apple.com/documentation/metal/mtlcapturedescriptor/3237248-captureobject
+    pub fn set_capture_command_queue(&self, command_queue: &CommandQueueRef) {
+        unsafe { msg_send![self, setCaptureObject: command_queue] }
+    }
+
+    /// https://developer.apple.com/documentation/metal/mtlcapturedescriptor/3237250-outputurl
+    pub fn output_url(&self) -> &Path {
+        let output_url = unsafe { msg_send![self, outputURL] };
+        let output_url = nsstring_as_str(output_url);
+
+        Path::new(output_url)
+    }
+
+    /// https://developer.apple.com/documentation/metal/mtlcapturedescriptor/3237250-outputurl
+    pub fn set_output_url<P: AsRef<Path>>(&self, output_url: P) {
+        let output_url = nsstring_from_str(output_url.as_ref().to_str().unwrap());
+
+        unsafe { msg_send![self, setOutputURL: output_url] }
+    }
+
+    /// https://developer.apple.com/documentation/metal/mtlcapturedescriptor?language=objc
+    pub fn destination(&self) -> MTLCaptureDestination {
+        unsafe { msg_send![self, destination] }
+    }
+
+    /// https://developer.apple.com/documentation/metal/mtlcapturedescriptor?language=objc
+    pub fn set_destination(&self, destination: MTLCaptureDestination) {
+        unsafe { msg_send![self, setDestination: destination] }
+    }
+}
diff --git a/third_party/rust/metal/src/capturemanager.rs b/third_party/rust/metal/src/capturemanager.rs
new file mode 100644
index 0000000000..95180c4239
--- /dev/null
+++ b/third_party/rust/metal/src/capturemanager.rs
@@ -0,0 +1,107 @@
+// Copyright 2018 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+use std::ffi::CStr;
+
+pub enum MTLCaptureScope {}
+
+foreign_obj_type! {
+    type CType = MTLCaptureScope;
+    pub struct CaptureScope;
+    pub struct CaptureScopeRef;
+}
+
+impl CaptureScopeRef {
+    pub fn begin_scope(&self) {
+        unsafe { msg_send![self, beginScope] }
+    }
+
+    pub fn end_scope(&self) {
+        unsafe { msg_send![self, endScope] }
+    }
+
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+}
+
+pub enum MTLCaptureManager {}
+
+foreign_obj_type! {
+    type CType = MTLCaptureManager;
+    pub struct CaptureManager;
+    pub struct CaptureManagerRef;
+}
+
+impl CaptureManager {
+    pub fn shared<'a>() -> &'a CaptureManagerRef {
+        unsafe {
+            let class = class!(MTLCaptureManager);
+            msg_send![class, sharedCaptureManager]
+        }
+    }
+}
+
+impl CaptureManagerRef {
+    pub fn new_capture_scope_with_device(&self, device: &DeviceRef) -> CaptureScope {
+        unsafe { msg_send![self, newCaptureScopeWithDevice: device] }
+    }
+
+    pub fn new_capture_scope_with_command_queue(
+        &self,
+        command_queue: &CommandQueueRef,
+    ) -> CaptureScope {
+        unsafe { msg_send![self, newCaptureScopeWithCommandQueue: command_queue] }
+    }
+
+    pub fn default_capture_scope(&self) -> Option<&CaptureScopeRef> {
+        unsafe { msg_send![self, defaultCaptureScope] }
+    }
+
+    pub fn set_default_capture_scope(&self, scope: &CaptureScopeRef) {
+        unsafe { msg_send![self, setDefaultCaptureScope: scope] }
+    }
+
+    /// https://developer.apple.com/documentation/metal/mtlcapturemanager/3237259-startcapture
+    pub fn start_capture(&self, descriptor: &CaptureDescriptorRef) -> Result<(), String> {
+        unsafe {
+            try_objc! { err =>
+                msg_send![self, startCaptureWithDescriptor: descriptor
+                                error: &mut err]
+            }
+        }
+    }
+
+    pub fn start_capture_with_device(&self, device: &DeviceRef) {
+        unsafe { msg_send![self, startCaptureWithDevice: device] }
+    }
+
+    pub fn start_capture_with_command_queue(&self, command_queue: &CommandQueueRef) {
+        unsafe { msg_send![self, startCaptureWithCommandQueue: command_queue] }
+    }
+
+    pub fn start_capture_with_scope(&self, scope: &CaptureScopeRef) {
+        unsafe { msg_send![self, startCaptureWithScope: scope] }
+    }
+
+    pub fn stop_capture(&self) {
+        unsafe { msg_send![self, stopCapture] }
+    }
+
+    pub fn is_capturing(&self) -> bool {
+        unsafe { msg_send![self, isCapturing] }
+    }
+
+    /// https://developer.apple.com/documentation/metal/mtlcapturemanager/3237260-supportsdestination?language=objc
+    pub fn supports_destination(&self, destination: MTLCaptureDestination) -> bool {
+        unsafe { msg_send![self, supportsDestination: destination] }
+    }
+}
diff --git a/third_party/rust/metal/src/commandbuffer.rs b/third_party/rust/metal/src/commandbuffer.rs
new file mode 100644
index 0000000000..32a1d8fb94
--- /dev/null
+++ b/third_party/rust/metal/src/commandbuffer.rs
@@ -0,0 +1,158 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+
+use block::Block;
+
+#[repr(u32)]
+#[allow(non_camel_case_types)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLCommandBufferStatus {
+    NotEnqueued = 0,
+    Enqueued = 1,
+    Committed = 2,
+    Scheduled = 3,
+    Completed = 4,
+    Error = 5,
+}
+
+#[repr(u32)]
+#[allow(non_camel_case_types)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLCommandBufferError {
+    None = 0,
+    Internal = 1,
+    Timeout = 2,
+    PageFault = 3,
+    Blacklisted = 4,
+    NotPermitted = 7,
+    OutOfMemory = 8,
+    InvalidResource = 9,
+    Memoryless = 10,
+    DeviceRemoved = 11,
+}
+
+#[repr(u32)]
+#[allow(non_camel_case_types)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLDispatchType {
+    Serial = 0,
+    Concurrent = 1,
+}
+
+type CommandBufferHandler<'a> = Block<(&'a CommandBufferRef,), ()>;
+
+pub enum MTLCommandBuffer {}
+
+foreign_obj_type! {
+    type CType = MTLCommandBuffer;
+    pub struct CommandBuffer;
+    pub struct CommandBufferRef;
+}
+
+impl CommandBufferRef {
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: nslabel];
+        }
+    }
+
+    pub fn enqueue(&self) {
+        unsafe { msg_send![self, enqueue] }
+    }
+
+    pub fn commit(&self) {
+        unsafe { msg_send![self, commit] }
+    }
+
+    pub fn status(&self) -> MTLCommandBufferStatus {
+        unsafe { msg_send![self, status] }
+    }
+
+    pub fn present_drawable(&self, drawable: &DrawableRef) {
+        unsafe { msg_send![self, presentDrawable: drawable] }
+    }
+
+    pub fn wait_until_completed(&self) {
+        unsafe { msg_send![self, waitUntilCompleted] }
+    }
+
+    pub fn wait_until_scheduled(&self) {
+        unsafe { msg_send![self, waitUntilScheduled] }
+    }
+
+    pub fn add_completed_handler(&self, block: &CommandBufferHandler) {
+        unsafe { msg_send![self, addCompletedHandler: block] }
+    }
+
+    pub fn new_blit_command_encoder(&self) -> &BlitCommandEncoderRef {
+        unsafe { msg_send![self, blitCommandEncoder] }
+    }
+
+    pub fn new_compute_command_encoder(&self) -> &ComputeCommandEncoderRef {
+        unsafe { msg_send![self, computeCommandEncoder] }
+    }
+
+    pub fn new_render_command_encoder(
+        &self,
+        descriptor: &RenderPassDescriptorRef,
+    ) -> &RenderCommandEncoderRef {
+        unsafe { msg_send![self, renderCommandEncoderWithDescriptor: descriptor] }
+    }
+
+    pub fn new_parallel_render_command_encoder(
+        &self,
+        descriptor: &RenderPassDescriptorRef,
+    ) -> &ParallelRenderCommandEncoderRef {
+        unsafe { msg_send![self, parallelRenderCommandEncoderWithDescriptor: descriptor] }
+    }
+
+    pub fn compute_command_encoder_with_dispatch_type(
+        &self,
+        ty: MTLDispatchType,
+    ) -> &ComputeCommandEncoderRef {
+        unsafe { msg_send![self, computeCommandEncoderWithDispatchType: ty] }
+    }
+
+    pub fn encode_signal_event(&self, event: &EventRef, new_value: u64) {
+        unsafe {
+            msg_send![self,
+                encodeSignalEvent: event
+                value: new_value
+            ]
+        }
+    }
+
+    pub fn encode_wait_for_event(&self, event: &EventRef, value: u64) {
+        unsafe {
+            msg_send![self,
+                encodeWaitForEvent: event
+                value: value
+            ]
+        }
+    }
+
+    pub fn push_debug_group(&self, name: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(name);
+            msg_send![self, pushDebugGroup: nslabel]
+        }
+    }
+
+    pub fn pop_debug_group(&self) {
+        unsafe { msg_send![self, popDebugGroup] }
+    }
+}
diff --git a/third_party/rust/metal/src/commandqueue.rs b/third_party/rust/metal/src/commandqueue.rs
new file mode 100644
index 0000000000..470d8dbe93
--- /dev/null
+++ b/third_party/rust/metal/src/commandqueue.rs
@@ -0,0 +1,44 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+
+pub enum MTLCommandQueue {}
+
+foreign_obj_type! {
+    type CType = MTLCommandQueue;
+    pub struct CommandQueue;
+    pub struct CommandQueueRef;
+}
+
+impl CommandQueueRef {
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: nslabel];
+        }
+    }
+
+    pub fn new_command_buffer(&self) -> &CommandBufferRef {
+        unsafe { msg_send![self, commandBuffer] }
+    }
+
+    pub fn new_command_buffer_with_unretained_references(&self) -> &CommandBufferRef {
+        unsafe { msg_send![self, commandBufferWithUnretainedReferences] }
+    }
+
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+}
diff --git a/third_party/rust/metal/src/constants.rs b/third_party/rust/metal/src/constants.rs
new file mode 100644
index 0000000000..0afbdd7e29
--- /dev/null
+++ b/third_party/rust/metal/src/constants.rs
@@ -0,0 +1,151 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+#[repr(u64)]
+#[allow(non_camel_case_types)]
+#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
+pub enum MTLPixelFormat {
+    Invalid = 0,
+    A8Unorm = 1,
+    R8Unorm = 10,
+    R8Unorm_sRGB = 11,
+    R8Snorm = 12,
+    R8Uint = 13,
+    R8Sint = 14,
+    R16Unorm = 20,
+    R16Snorm = 22,
+    R16Uint = 23,
+    R16Sint = 24,
+    R16Float = 25,
+    RG8Unorm = 30,
+    RG8Unorm_sRGB = 31,
+    RG8Snorm = 32,
+    RG8Uint = 33,
+    RG8Sint = 34,
+    B5G6R5Unorm = 40,
+    A1BGR5Unorm = 41,
+    ABGR4Unorm = 42,
+    BGR5A1Unorm = 43,
+    R32Uint = 53,
+    R32Sint = 54,
+    R32Float = 55,
+    RG16Unorm = 60,
+    RG16Snorm = 62,
+    RG16Uint = 63,
+    RG16Sint = 64,
+    RG16Float = 65,
+    RGBA8Unorm = 70,
+    RGBA8Unorm_sRGB = 71,
+    RGBA8Snorm = 72,
+    RGBA8Uint = 73,
+    RGBA8Sint = 74,
+    BGRA8Unorm = 80,
+    BGRA8Unorm_sRGB = 81,
+    RGB10A2Unorm = 90,
+    RGB10A2Uint = 91,
+    RG11B10Float = 92,
+    RGB9E5Float = 93,
+    BGR10A2Unorm = 94,
+    RG32Uint = 103,
+    RG32Sint = 104,
+    RG32Float = 105,
+    RGBA16Unorm = 110,
+    RGBA16Snorm = 112,
+    RGBA16Uint = 113,
+    RGBA16Sint = 114,
+    RGBA16Float = 115,
+    RGBA32Uint = 123,
+    RGBA32Sint = 124,
+    RGBA32Float = 125,
+    BC1_RGBA = 130,
+    BC1_RGBA_sRGB = 131,
+    BC2_RGBA = 132,
+    BC2_RGBA_sRGB = 133,
+    BC3_RGBA = 134,
+    BC3_RGBA_sRGB = 135,
+    BC4_RUnorm = 140,
+    BC4_RSnorm = 141,
+    BC5_RGUnorm = 142,
+    BC5_RGSnorm = 143,
+    BC6H_RGBFloat = 150,
+    BC6H_RGBUfloat = 151,
+    BC7_RGBAUnorm = 152,
+    BC7_RGBAUnorm_sRGB = 153,
+    PVRTC_RGB_2BPP = 160,
+    PVRTC_RGB_2BPP_sRGB = 161,
+    PVRTC_RGB_4BPP = 162,
+    PVRTC_RGB_4BPP_sRGB = 163,
+    PVRTC_RGBA_2BPP = 164,
+    PVRTC_RGBA_2BPP_sRGB = 165,
+    PVRTC_RGBA_4BPP = 166,
+    PVRTC_RGBA_4BPP_sRGB = 167,
+    EAC_R11Unorm = 170,
+    EAC_R11Snorm = 172,
+    EAC_RG11Unorm = 174,
+    EAC_RG11Snorm = 176,
+    EAC_RGBA8 = 178,
+    EAC_RGBA8_sRGB = 179,
+    ETC2_RGB8 = 180,
+    ETC2_RGB8_sRGB = 181,
+    ETC2_RGB8A1 = 182,
+    ETC2_RGB8A1_sRGB = 183,
+    ASTC_4x4_sRGB = 186,
+    ASTC_5x4_sRGB = 187,
+    ASTC_5x5_sRGB = 188,
+    ASTC_6x5_sRGB = 189,
+    ASTC_6x6_sRGB = 190,
+    ASTC_8x5_sRGB = 192,
+    ASTC_8x6_sRGB = 193,
+    ASTC_8x8_sRGB = 194,
+    ASTC_10x5_sRGB = 195,
+    ASTC_10x6_sRGB = 196,
+    ASTC_10x8_sRGB = 197,
+    ASTC_10x10_sRGB = 198,
+    ASTC_12x10_sRGB = 199,
+    ASTC_12x12_sRGB = 200,
+    ASTC_4x4_LDR = 204,
+    ASTC_5x4_LDR = 205,
+    ASTC_5x5_LDR = 206,
+    ASTC_6x5_LDR = 207,
+    ASTC_6x6_LDR = 208,
+    ASTC_8x5_LDR = 210,
+    ASTC_8x6_LDR = 211,
+    ASTC_8x8_LDR = 212,
+    ASTC_10x5_LDR = 213,
+    ASTC_10x6_LDR = 214,
+    ASTC_10x8_LDR = 215,
+    ASTC_10x10_LDR = 216,
+    ASTC_12x10_LDR = 217,
+    ASTC_12x12_LDR = 218,
+    ASTC_4x4_HDR = 222,
+    ASTC_5x4_HDR = 223,
+    ASTC_5x5_HDR = 224,
+    ASTC_6x5_HDR = 225,
+    ASTC_6x6_HDR = 226,
+    ASTC_8x5_HDR = 228,
+    ASTC_8x6_HDR = 229,
+    ASTC_8x8_HDR = 230,
+    ASTC_10x5_HDR = 231,
+    ASTC_10x6_HDR = 232,
+    ASTC_10x8_HDR = 233,
+    ASTC_10x10_HDR = 234,
+    ASTC_12x10_HDR = 235,
+    ASTC_12x12_HDR = 236,
+    GBGR422 = 240,
+    BGRG422 = 241,
+    Depth16Unorm = 250,
+    Depth32Float = 252,
+    Stencil8 = 253,
+    Depth24Unorm_Stencil8 = 255,
+    Depth32Float_Stencil8 = 260,
+    X32_Stencil8 = 261,
+    X24_Stencil8 = 262,
+    BGRA10_XR = 552,
+    BGRA10_XR_SRGB = 553,
+    BGR10_XR = 554,
+    BGR10_XR_SRGB = 555,
+}
diff --git a/third_party/rust/metal/src/depthstencil.rs b/third_party/rust/metal/src/depthstencil.rs
new file mode 100644
index 0000000000..5b578e6d46
--- /dev/null
+++ b/third_party/rust/metal/src/depthstencil.rs
@@ -0,0 +1,194 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use crate::DeviceRef;
+use objc::runtime::{NO, YES};
+
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLCompareFunction {
+    Never = 0,
+    Less = 1,
+    Equal = 2,
+    LessEqual = 3,
+    Greater = 4,
+    NotEqual = 5,
+    GreaterEqual = 6,
+    Always = 7,
+}
+
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLStencilOperation {
+    Keep = 0,
+    Zero = 1,
+    Replace = 2,
+    IncrementClamp = 3,
+    DecrementClamp = 4,
+    Invert = 5,
+    IncrementWrap = 6,
+    DecrementWrap = 7,
+}
+
+pub enum MTLStencilDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLStencilDescriptor;
+    pub struct StencilDescriptor;
+    pub struct StencilDescriptorRef;
+}
+
+impl StencilDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLStencilDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl StencilDescriptorRef {
+    pub fn stencil_compare_function(&self) -> MTLCompareFunction {
+        unsafe { msg_send![self, stencilCompareFunction] }
+    }
+
+    pub fn set_stencil_compare_function(&self, func: MTLCompareFunction) {
+        unsafe { msg_send![self, setStencilCompareFunction: func] }
+    }
+
+    pub fn stencil_failure_operation(&self) -> MTLStencilOperation {
+        unsafe { msg_send![self, stencilFailureOperation] }
+    }
+
+    pub fn set_stencil_failure_operation(&self, operation: MTLStencilOperation) {
+        unsafe { msg_send![self, setStencilFailureOperation: operation] }
+    }
+
+    pub fn depth_failure_operation(&self) -> MTLStencilOperation {
+        unsafe { msg_send![self, depthFailureOperation] }
+    }
+
+    pub fn set_depth_failure_operation(&self, operation: MTLStencilOperation) {
+        unsafe { msg_send![self, setDepthFailureOperation: operation] }
+    }
+
+    pub fn depth_stencil_pass_operation(&self) -> MTLStencilOperation {
+        unsafe { msg_send![self, depthStencilPassOperation] }
+    }
+
+    pub fn set_depth_stencil_pass_operation(&self, operation: MTLStencilOperation) {
+        unsafe { msg_send![self, setDepthStencilPassOperation: operation] }
+    }
+
+    pub fn read_mask(&self) -> u32 {
+        unsafe { msg_send![self, readMask] }
+    }
+
+    pub fn set_read_mask(&self, mask: u32) {
+        unsafe { msg_send![self, setReadMask: mask] }
+    }
+
+    pub fn write_mask(&self) -> u32 {
+        unsafe { msg_send![self, writeMask] }
+    }
+
+    pub fn set_write_mask(&self, mask: u32) {
+        unsafe { msg_send![self, setWriteMask: mask] }
+    }
+}
+
+pub enum MTLDepthStencilDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLDepthStencilDescriptor;
+    pub struct DepthStencilDescriptor;
+    pub struct DepthStencilDescriptorRef;
+}
+
+impl DepthStencilDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLDepthStencilDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl DepthStencilDescriptorRef {
+    pub fn depth_compare_function(&self) -> MTLCompareFunction {
+        unsafe { msg_send![self, depthCompareFunction] }
+    }
+
+    pub fn set_depth_compare_function(&self, func: MTLCompareFunction) {
+        unsafe { msg_send![self, setDepthCompareFunction: func] }
+    }
+
+    pub fn depth_write_enabled(&self) -> bool {
+        unsafe {
+            match msg_send![self, isDepthWriteEnabled] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn set_depth_write_enabled(&self, enabled: bool) {
+        unsafe { msg_send![self, setDepthWriteEnabled: enabled] }
+    }
+
+    pub fn front_face_stencil(&self) -> Option<&StencilDescriptorRef> {
+        unsafe { msg_send![self, frontFaceStencil] }
+    }
+
+    pub fn set_front_face_stencil(&self, descriptor: Option<&StencilDescriptorRef>) {
+        unsafe { msg_send![self, setFrontFaceStencil: descriptor] }
+    }
+
+    pub fn back_face_stencil(&self) -> Option<&StencilDescriptorRef> {
+        unsafe { msg_send![self, backFaceStencil] }
+    }
+
+    pub fn set_back_face_stencil(&self, descriptor: Option<&StencilDescriptorRef>) {
+        unsafe { msg_send![self, setBackFaceStencil: descriptor] }
+    }
+
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: nslabel];
+        }
+    }
+}
+
+pub enum MTLDepthStencilState {}
+
+foreign_obj_type! {
+    type CType = MTLDepthStencilState;
+    pub struct DepthStencilState;
+    pub struct DepthStencilStateRef;
+}
+
+impl DepthStencilStateRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+}
diff --git a/third_party/rust/metal/src/device.rs b/third_party/rust/metal/src/device.rs
new file mode 100644
index 0000000000..1cb0a40783
--- /dev/null
+++ b/third_party/rust/metal/src/device.rs
@@ -0,0 +1,2117 @@
+// Copyright 2017 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+
+use block::{Block, ConcreteBlock};
+use foreign_types::ForeignType;
+use objc::runtime::{Object, NO, YES};
+
+use std::{ffi::CStr, os::raw::c_char, path::Path, ptr};
+
+// Available on macOS 10.11+, iOS 8.0+, tvOS 9.0+
+#[allow(non_camel_case_types)]
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLFeatureSet {
+    iOS_GPUFamily1_v1 = 0,
+    iOS_GPUFamily2_v1 = 1,
+    iOS_GPUFamily1_v2 = 2,
+    iOS_GPUFamily2_v2 = 3,
+    iOS_GPUFamily3_v1 = 4,
+    iOS_GPUFamily1_v3 = 5,
+    iOS_GPUFamily2_v3 = 6,
+    iOS_GPUFamily3_v2 = 7,
+    iOS_GPUFamily1_v4 = 8,
+    iOS_GPUFamily2_v4 = 9,
+    iOS_GPUFamily3_v3 = 10,
+    iOS_GPUFamily4_v1 = 11,
+    iOS_GPUFamily1_v5 = 12,
+    iOS_GPUFamily2_v5 = 13,
+    iOS_GPUFamily3_v4 = 14,
+    iOS_GPUFamily4_v2 = 15,
+    iOS_GPUFamily5_v1 = 16,
+
+    tvOS_GPUFamily1_v1 = 30000,
+    tvOS_GPUFamily1_v2 = 30001,
+    tvOS_GPUFamily1_v3 = 30002,
+    tvOS_GPUFamily2_v1 = 30003,
+    tvOS_GPUFamily1_v4 = 30004,
+    tvOS_GPUFamily2_v2 = 30005,
+
+    macOS_GPUFamily1_v1 = 10000,
+    macOS_GPUFamily1_v2 = 10001,
+    // Available on macOS 10.12+
+    macOS_ReadWriteTextureTier2 = 10002,
+    macOS_GPUFamily1_v3 = 10003,
+    macOS_GPUFamily1_v4 = 10004,
+    macOS_GPUFamily2_v1 = 10005,
+}
+
+// Available on macOS 10.15+, iOS 13.0+
+#[repr(i64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+#[non_exhaustive]
+pub enum MTLGPUFamily {
+    Common1 = 3001,
+    Common2 = 3002,
+    Common3 = 3003,
+    Apple1 = 1001,
+    Apple2 = 1002,
+    Apple3 = 1003,
+    Apple4 = 1004,
+    Apple5 = 1005,
+    Apple6 = 1006,
+    Apple7 = 1007,
+    Apple8 = 1008,
+    Apple9 = 1009,
+    Mac1 = 2001,
+    Mac2 = 2002,
+    MacCatalyst1 = 4001,
+    MacCatalyst2 = 4002,
+}
+
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLDeviceLocation {
+    BuiltIn = 0,
+    Slot = 1,
+    External = 2,
+    Unspecified = u64::MAX,
+}
+
+bitflags! {
+    pub struct PixelFormatCapabilities: u32 {
+        const Filter = 1 << 0;
+        const Write = 1 << 1;
+        const Color = 1 << 2;
+        const Blend = 1 << 3;
+        const Msaa = 1 << 4;
+        const Resolve = 1 << 5;
+    }
+}
+
+#[allow(non_camel_case_types)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+enum OS {
+    iOS,
+    tvOS,
+    macOS,
+}
+
+const KB: u32 = 1024;
+const MB: u32 = 1024 * KB;
+const GB: u32 = 1024 * MB;
+
+impl MTLFeatureSet {
+    fn os(&self) -> OS {
+        let value = *self as u64;
+        if value < 10_000 {
+            OS::iOS
+        } else if value < 20_000 {
+            OS::macOS
+        } else if value >= 30_000 || value < 40_000 {
+            OS::tvOS
+        } else {
+            unreachable!()
+        }
+    }
+
+    // returns the minor version on macos
+    fn os_version(&self) -> u32 {
+        use MTLFeatureSet::*;
+        match self {
+            iOS_GPUFamily1_v1 | iOS_GPUFamily2_v1 => 8,
+            iOS_GPUFamily1_v2 | iOS_GPUFamily2_v2 | iOS_GPUFamily3_v1 => 9,
+            iOS_GPUFamily1_v3 | iOS_GPUFamily2_v3 | iOS_GPUFamily3_v2 => 10,
+            iOS_GPUFamily1_v4 | iOS_GPUFamily2_v4 | iOS_GPUFamily3_v3 | iOS_GPUFamily4_v1 => 11,
+            iOS_GPUFamily1_v5 | iOS_GPUFamily2_v5 | iOS_GPUFamily3_v4 | iOS_GPUFamily4_v2
+            | iOS_GPUFamily5_v1 => 12,
+            tvOS_GPUFamily1_v1 => 9,
+            tvOS_GPUFamily1_v2 => 10,
+            tvOS_GPUFamily1_v3 | tvOS_GPUFamily2_v1 => 11,
+            tvOS_GPUFamily1_v4 | tvOS_GPUFamily2_v2 => 12,
+            macOS_GPUFamily1_v1 => 11,
+            macOS_GPUFamily1_v2 | macOS_ReadWriteTextureTier2 => 12,
+            macOS_GPUFamily1_v3 => 13,
+            macOS_GPUFamily1_v4 | macOS_GPUFamily2_v1 => 14,
+        }
+    }
+
+    fn gpu_family(&self) -> u32 {
+        use MTLFeatureSet::*;
+        match self {
+            iOS_GPUFamily1_v1
+            | iOS_GPUFamily1_v2
+            | iOS_GPUFamily1_v3
+            | iOS_GPUFamily1_v4
+            | iOS_GPUFamily1_v5
+            | tvOS_GPUFamily1_v1
+            | tvOS_GPUFamily1_v2
+            | tvOS_GPUFamily1_v3
+            | tvOS_GPUFamily1_v4
+            | macOS_GPUFamily1_v1
+            | macOS_GPUFamily1_v2
+            | macOS_ReadWriteTextureTier2
+            | macOS_GPUFamily1_v3
+            | macOS_GPUFamily1_v4 => 1,
+            iOS_GPUFamily2_v1 | iOS_GPUFamily2_v2 | iOS_GPUFamily2_v3 | iOS_GPUFamily2_v4
+            | iOS_GPUFamily2_v5 | tvOS_GPUFamily2_v1 | tvOS_GPUFamily2_v2 | macOS_GPUFamily2_v1 => {
+                2
+            }
+            iOS_GPUFamily3_v1 | iOS_GPUFamily3_v2 | iOS_GPUFamily3_v3 | iOS_GPUFamily3_v4 => 3,
+            iOS_GPUFamily4_v1 | iOS_GPUFamily4_v2 => 4,
+            iOS_GPUFamily5_v1 => 5,
+        }
+    }
+
+    fn version(&self) -> u32 {
+        use MTLFeatureSet::*;
+        match self {
+            iOS_GPUFamily1_v1
+            | iOS_GPUFamily2_v1
+            | iOS_GPUFamily3_v1
+            | iOS_GPUFamily4_v1
+            | iOS_GPUFamily5_v1
+            | macOS_GPUFamily1_v1
+            | macOS_GPUFamily2_v1
+            | macOS_ReadWriteTextureTier2
+            | tvOS_GPUFamily1_v1
+            | tvOS_GPUFamily2_v1 => 1,
+            iOS_GPUFamily1_v2 | iOS_GPUFamily2_v2 | iOS_GPUFamily3_v2 | iOS_GPUFamily4_v2
+            | macOS_GPUFamily1_v2 | tvOS_GPUFamily1_v2 | tvOS_GPUFamily2_v2 => 2,
+            iOS_GPUFamily1_v3 | iOS_GPUFamily2_v3 | iOS_GPUFamily3_v3 | macOS_GPUFamily1_v3
+            | tvOS_GPUFamily1_v3 => 3,
+            iOS_GPUFamily1_v4 | iOS_GPUFamily2_v4 | iOS_GPUFamily3_v4 | tvOS_GPUFamily1_v4
+            | macOS_GPUFamily1_v4 => 4,
+            iOS_GPUFamily1_v5 | iOS_GPUFamily2_v5 => 5,
+        }
+    }
+
+    pub fn supports_metal_kit(&self) -> bool {
+        true
+    }
+
+    pub fn supports_metal_performance_shaders(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.gpu_family() >= 2,
+            OS::tvOS => true,
+            OS::macOS => self.os_version() >= 13,
+        }
+    }
+
+    pub fn supports_programmable_blending(&self) -> bool {
+        self.os() != OS::macOS
+    }
+
+    pub fn supports_pvrtc_pixel_formats(&self) -> bool {
+        self.os() != OS::macOS
+    }
+
+    pub fn supports_eac_etc_pixel_formats(&self) -> bool {
+        self.os() != OS::macOS
+    }
+
+    pub fn supports_astc_pixel_formats(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.gpu_family() >= 2,
+            OS::tvOS => true,
+            OS::macOS => false,
+        }
+    }
+
+    pub fn supports_linear_textures(&self) -> bool {
+        self.os() != OS::macOS || self.os_version() >= 13
+    }
+
+    pub fn supports_bc_pixel_formats(&self) -> bool {
+        self.os() == OS::macOS
+    }
+
+    pub fn supports_msaa_depth_resolve(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.gpu_family() >= 3,
+            OS::tvOS => self.gpu_family() >= 2,
+            OS::macOS => false,
+        }
+    }
+
+    pub fn supports_counting_occlusion_query(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.gpu_family() >= 3,
+            OS::tvOS => self.gpu_family() >= 2,
+            OS::macOS => true,
+        }
+    }
+
+    pub fn supports_base_vertex_instance_drawing(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.gpu_family() >= 3,
+            OS::tvOS => self.gpu_family() >= 2,
+            OS::macOS => true,
+        }
+    }
+
+    pub fn supports_indirect_buffers(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.gpu_family() >= 3,
+            OS::tvOS => self.gpu_family() >= 2,
+            OS::macOS => true,
+        }
+    }
+
+    pub fn supports_cube_map_texture_arrays(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.gpu_family() >= 4,
+            OS::tvOS => false,
+            OS::macOS => true,
+        }
+    }
+
+    pub fn supports_texture_barriers(&self) -> bool {
+        self.os() == OS::macOS
+    }
+
+    pub fn supports_layered_rendering(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.gpu_family() >= 5,
+            OS::tvOS => false,
+            OS::macOS => true,
+        }
+    }
+
+    pub fn supports_tessellation(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.gpu_family() >= 3 && self.os_version() >= 10,
+            OS::tvOS => self.gpu_family() >= 2,
+            OS::macOS => self.os_version() >= 12,
+        }
+    }
+
+    pub fn supports_resource_heaps(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.os_version() >= 10,
+            OS::tvOS => self.os_version() >= 10,
+            OS::macOS => self.os_version() >= 13,
+        }
+    }
+
+    pub fn supports_memoryless_render_targets(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.os_version() >= 10,
+            OS::tvOS => self.os_version() >= 10,
+            OS::macOS => false,
+        }
+    }
+
+    pub fn supports_function_specialization(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.os_version() >= 10,
+            OS::tvOS => self.os_version() >= 10,
+            OS::macOS => self.os_version() >= 12,
+        }
+    }
+
+    pub fn supports_function_buffer_read_writes(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.gpu_family() >= 3 && self.os_version() >= 10,
+            OS::tvOS => self.gpu_family() >= 2,
+            OS::macOS => self.os_version() >= 12,
+        }
+    }
+
+    pub fn supports_function_texture_read_writes(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.gpu_family() >= 4,
+            OS::tvOS => false,
+            OS::macOS => self.os_version() >= 12,
+        }
+    }
+
+    pub fn supports_array_of_textures(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.gpu_family() >= 3 && self.os_version() >= 10,
+            OS::tvOS => self.gpu_family() >= 2,
+            OS::macOS => self.os_version() >= 13,
+        }
+    }
+
+    pub fn supports_array_of_samplers(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.gpu_family() >= 3 && self.os_version() >= 11,
+            OS::tvOS => self.gpu_family() >= 2,
+            OS::macOS => self.os_version() >= 12,
+        }
+    }
+
+    pub fn supports_stencil_texture_views(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.os_version() >= 10,
+            OS::tvOS => self.os_version() >= 10,
+            OS::macOS => self.os_version() >= 12,
+        }
+    }
+
+    pub fn supports_depth_16_pixel_format(&self) -> bool {
+        self.os() == OS::macOS && self.os_version() >= 12
+    }
+
+    pub fn supports_extended_range_pixel_formats(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.gpu_family() >= 3 && self.os_version() >= 10,
+            OS::tvOS => self.gpu_family() >= 2,
+            OS::macOS => false,
+        }
+    }
+
+    pub fn supports_wide_color_pixel_format(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.os_version() >= 11,
+            OS::tvOS => self.os_version() >= 11,
+            OS::macOS => self.os_version() >= 13,
+        }
+    }
+
+    pub fn supports_combined_msaa_store_and_resolve_action(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.gpu_family() >= 3 && self.os_version() >= 10,
+            OS::tvOS => self.gpu_family() >= 2,
+            OS::macOS => self.os_version() >= 12,
+        }
+    }
+
+    pub fn supports_deferred_store_action(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.os_version() >= 10,
+            OS::tvOS => self.os_version() >= 10,
+            OS::macOS => self.os_version() >= 12,
+        }
+    }
+
+    pub fn supports_msaa_blits(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.os_version() >= 10,
+            OS::tvOS => self.os_version() >= 10,
+            OS::macOS => true,
+        }
+    }
+
+    pub fn supports_srgb_writes(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.gpu_family() >= 3 || (self.gpu_family() >= 2 && self.version() >= 3),
+            OS::tvOS => self.os_version() >= 10,
+            OS::macOS => self.gpu_family() >= 2,
+        }
+    }
+
+    pub fn supports_16_bit_unsigned_integer_coordinates(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.os_version() >= 10,
+            OS::tvOS => self.os_version() >= 10,
+            OS::macOS => self.os_version() >= 12,
+        }
+    }
+
+    pub fn supports_extract_insert_and_reverse_bits(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.os_version() >= 10,
+            OS::tvOS => self.os_version() >= 10,
+            OS::macOS => self.os_version() >= 12,
+        }
+    }
+
+    pub fn supports_simd_barrier(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.os_version() >= 10,
+            OS::tvOS => self.os_version() >= 10,
+            OS::macOS => self.os_version() >= 13,
+        }
+    }
+
+    pub fn supports_sampler_max_anisotropy(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.os_version() >= 10,
+            OS::tvOS => self.os_version() >= 10,
+            OS::macOS => self.os_version() >= 13,
+        }
+    }
+
+    pub fn supports_sampler_lod_clamp(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.os_version() >= 10,
+            OS::tvOS => self.os_version() >= 10,
+            OS::macOS => self.os_version() >= 13,
+        }
+    }
+
+    pub fn supports_border_color(&self) -> bool {
+        self.os() == OS::macOS && self.os_version() >= 12
+    }
+
+    pub fn supports_dual_source_blending(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.os_version() >= 11,
+            OS::tvOS => self.os_version() >= 11,
+            OS::macOS => self.os_version() >= 12,
+        }
+    }
+
+    pub fn supports_argument_buffers(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.os_version() >= 11,
+            OS::tvOS => self.os_version() >= 11,
+            OS::macOS => self.os_version() >= 13,
+        }
+    }
+
+    pub fn supports_programmable_sample_positions(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.os_version() >= 11,
+            OS::tvOS => self.os_version() >= 11,
+            OS::macOS => self.os_version() >= 13,
+        }
+    }
+
+    pub fn supports_uniform_type(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.os_version() >= 11,
+            OS::tvOS => self.os_version() >= 11,
+            OS::macOS => self.os_version() >= 13,
+        }
+    }
+
+    pub fn supports_imageblocks(&self) -> bool {
+        self.os() == OS::iOS && self.gpu_family() >= 4
+    }
+
+    pub fn supports_tile_shaders(&self) -> bool {
+        self.os() == OS::iOS && self.gpu_family() >= 4
+    }
+
+    pub fn supports_imageblock_sample_coverage_control(&self) -> bool {
+        self.os() == OS::iOS && self.gpu_family() >= 4
+    }
+
+    pub fn supports_threadgroup_sharing(&self) -> bool {
+        self.os() == OS::iOS && self.gpu_family() >= 4
+    }
+
+    pub fn supports_post_depth_coverage(&self) -> bool {
+        self.os() == OS::iOS && self.gpu_family() >= 4
+    }
+
+    pub fn supports_quad_scoped_permute_operations(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.gpu_family() >= 4,
+            OS::tvOS => false,
+            OS::macOS => self.os_version() >= 13,
+        }
+    }
+
+    pub fn supports_raster_order_groups(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.gpu_family() >= 4,
+            OS::tvOS => false,
+            OS::macOS => self.os_version() >= 13,
+        }
+    }
+
+    pub fn supports_non_uniform_threadgroup_size(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.gpu_family() >= 4,
+            OS::tvOS => false,
+            OS::macOS => self.os_version() >= 13,
+        }
+    }
+
+    pub fn supports_multiple_viewports(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.gpu_family() >= 5,
+            OS::tvOS => false,
+            OS::macOS => self.os_version() >= 13,
+        }
+    }
+
+    pub fn supports_device_notifications(&self) -> bool {
+        self.os() == OS::macOS && self.os_version() >= 13
+    }
+
+    pub fn supports_stencil_feedback(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.gpu_family() >= 5,
+            OS::tvOS => false,
+            OS::macOS => self.gpu_family() >= 2,
+        }
+    }
+
+    pub fn supports_stencil_resolve(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.gpu_family() >= 5,
+            OS::tvOS => false,
+            OS::macOS => self.gpu_family() >= 2,
+        }
+    }
+
+    pub fn supports_binary_archive(&self) -> bool {
+        match self.os() {
+            OS::iOS => self.gpu_family() >= 3,
+            OS::tvOS => self.gpu_family() >= 3,
+            OS::macOS => self.gpu_family() >= 1,
+        }
+    }
+
+    pub fn max_vertex_attributes(&self) -> u32 {
+        31
+    }
+
+    pub fn max_buffer_argument_entries(&self) -> u32 {
+        31
+    }
+
+    pub fn max_texture_argument_entries(&self) -> u32 {
+        if self.os() == OS::macOS {
+            128
+        } else {
+            31
+        }
+    }
+
+    pub fn max_sampler_state_argument_entries(&self) -> u32 {
+        16
+    }
+
+    pub fn max_threadgroup_memory_argument_entries(&self) -> u32 {
+        31
+    }
+
+    pub fn max_inlined_constant_data_buffers(&self) -> u32 {
+        if self.os() == OS::macOS {
+            14
+        } else {
+            31
+        }
+    }
+
+    pub fn max_inline_constant_buffer_length(&self) -> u32 {
+        4 * KB
+    }
+
+    pub fn max_threads_per_threadgroup(&self) -> u32 {
+        if self.os() == OS::macOS || self.gpu_family() >= 4 {
+            1024
+        } else {
+            512
+        }
+    }
+
+    pub fn max_total_threadgroup_memory_allocation(&self) -> u32 {
+        match (self.os(), self.gpu_family()) {
+            (OS::iOS, 5) => 64 * KB,
+            (OS::iOS, 4) => {
+                if self.os_version() >= 12 {
+                    64 * KB
+                } else {
+                    32 * KB
+                }
+            }
+            (OS::iOS, 3) => 16 * KB,
+            (OS::iOS, _) => 16 * KB - 32,
+            (OS::tvOS, 1) => 16 * KB - 32,
+            (OS::tvOS, _) => 16 * KB,
+            (OS::macOS, _) => 32 * KB,
+        }
+    }
+
+    pub fn max_total_tile_memory_allocation(&self) -> u32 {
+        if self.os() == OS::iOS && self.gpu_family() == 4 {
+            32 * KB
+        } else {
+            0
+        }
+    }
+
+    pub fn threadgroup_memory_length_alignment(&self) -> u32 {
+        16
+    }
+
+    pub fn max_constant_buffer_function_memory_allocation(&self) -> Option<u32> {
+        if self.os() == OS::macOS {
+            Some(64 * KB)
+        } else {
+            None
+        }
+    }
+
+    pub fn max_fragment_inputs(&self) -> u32 {
+        if self.os() == OS::macOS {
+            32
+        } else {
+            60
+        }
+    }
+
+    pub fn max_fragment_input_components(&self) -> u32 {
+        if self.os() == OS::macOS {
+            128
+        } else {
+            60
+        }
+    }
+
+    pub fn max_function_constants(&self) -> u32 {
+        match self.os() {
+            OS::iOS if self.os_version() >= 11 => 65536,
+            OS::tvOS if self.os_version() >= 10 => 65536,
+            OS::macOS if self.os_version() >= 12 => 65536,
+            _ => 0,
+        }
+    }
+
+    pub fn max_tessellation_factor(&self) -> u32 {
+        if self.supports_tessellation() {
+            match self.os() {
+                OS::iOS if self.gpu_family() >= 5 => 64,
+                OS::iOS => 16,
+                OS::tvOS => 16,
+                OS::macOS => 64,
+            }
+        } else {
+            0
+        }
+    }
+
+    pub fn max_viewports_and_scissor_rectangles(&self) -> u32 {
+        if self.supports_multiple_viewports() {
+            16
+        } else {
+            1
+        }
+    }
+
+    pub fn max_raster_order_groups(&self) -> u32 {
+        if self.supports_raster_order_groups() {
+            8
+        } else {
+            0
+        }
+    }
+
+    pub fn max_buffer_length(&self) -> u32 {
+        if self.os() == OS::macOS && self.os_version() >= 12 {
+            1 * GB
+        } else {
+            256 * MB
+        }
+    }
+
+    pub fn min_buffer_offset_alignment(&self) -> u32 {
+        if self.os() == OS::macOS {
+            256
+        } else {
+            4
+        }
+    }
+
+    pub fn max_1d_texture_size(&self) -> u32 {
+        match (self.os(), self.gpu_family()) {
+            (OS::iOS, 1) | (OS::iOS, 2) => {
+                if self.version() <= 2 {
+                    4096
+                } else {
+                    8192
+                }
+            }
+            (OS::tvOS, 1) => 8192,
+            _ => 16384,
+        }
+    }
+
+    pub fn max_2d_texture_size(&self) -> u32 {
+        match (self.os(), self.gpu_family()) {
+            (OS::iOS, 1) | (OS::iOS, 2) => {
+                if self.version() <= 2 {
+                    4096
+                } else {
+                    8192
+                }
+            }
+            (OS::tvOS, 1) => 8192,
+            _ => 16384,
+        }
+    }
+
+    pub fn max_cube_map_texture_size(&self) -> u32 {
+        match (self.os(), self.gpu_family()) {
+            (OS::iOS, 1) | (OS::iOS, 2) => {
+                if self.version() <= 2 {
+                    4096
+                } else {
+                    8192
+                }
+            }
+            (OS::tvOS, 1) => 8192,
+            _ => 16384,
+        }
+    }
+
+    pub fn max_3d_texture_size(&self) -> u32 {
+        2048
+    }
+
+    pub fn max_array_layers(&self) -> u32 {
+        2048
+    }
+
+    pub fn copy_texture_buffer_alignment(&self) -> u32 {
+        match (self.os(), self.gpu_family()) {
+            (OS::iOS, 1) | (OS::iOS, 2) | (OS::tvOS, 1) => 64,
+            (OS::iOS, _) | (OS::tvOS, _) => 16,
+            (OS::macOS, _) => 256,
+        }
+    }
+
+    /// If this function returns `None` but linear textures are supported,
+    /// the buffer alignment can be discovered via API query
+    pub fn new_texture_buffer_alignment(&self) -> Option<u32> {
+        match self.os() {
+            OS::iOS => {
+                if self.os_version() >= 11 {
+                    None
+                } else if self.gpu_family() == 3 {
+                    Some(16)
+                } else {
+                    Some(64)
+                }
+            }
+            OS::tvOS => {
+                if self.os_version() >= 11 {
+                    None
+                } else {
+                    Some(64)
+                }
+            }
+            OS::macOS => None,
+        }
+    }
+
+    pub fn max_color_render_targets(&self) -> u32 {
+        if self.os() == OS::iOS && self.gpu_family() == 1 {
+            4
+        } else {
+            8
+        }
+    }
+
+    pub fn max_point_primitive_size(&self) -> u32 {
+        511
+    }
+
+    pub fn max_total_color_render_target_size(&self) -> Option<u32> {
+        match (self.os(), self.gpu_family()) {
+            (OS::iOS, 1) => Some(128),
+            (OS::iOS, 2) | (OS::iOS, 3) => Some(256),
+            (OS::iOS, _) => Some(512),
+            (OS::tvOS, _) => Some(256),
+            (OS::macOS, _) => None,
+        }
+    }
+
+    pub fn max_visibility_query_offset(&self) -> u32 {
+        64 * KB - 8
+    }
+
+    pub fn a8_unorm_capabilities(&self) -> PixelFormatCapabilities {
+        PixelFormatCapabilities::Filter
+    }
+
+    pub fn r8_unorm_capabilities(&self) -> PixelFormatCapabilities {
+        PixelFormatCapabilities::all()
+    }
+
+    pub fn r8_unorm_srgb_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() == OS::macOS {
+            PixelFormatCapabilities::empty()
+        } else if self.supports_srgb_writes() {
+            PixelFormatCapabilities::all()
+        } else {
+            !PixelFormatCapabilities::Write
+        }
+    }
+
+    pub fn r8_snorm_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() == OS::iOS && self.gpu_family() == 1 {
+            !PixelFormatCapabilities::Resolve
+        } else {
+            PixelFormatCapabilities::all()
+        }
+    }
+
+    pub fn r8_uint_capabilities(&self) -> PixelFormatCapabilities {
+        PixelFormatCapabilities::Write
+            | PixelFormatCapabilities::Color
+            | PixelFormatCapabilities::Msaa
+    }
+
+    pub fn r8_sint_capabilities(&self) -> PixelFormatCapabilities {
+        PixelFormatCapabilities::Write
+            | PixelFormatCapabilities::Color
+            | PixelFormatCapabilities::Msaa
+    }
+
+    pub fn r16_unorm_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() != OS::macOS {
+            !PixelFormatCapabilities::Resolve
+        } else {
+            PixelFormatCapabilities::all()
+        }
+    }
+
+    pub fn r16_snorm_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() != OS::macOS {
+            !PixelFormatCapabilities::Resolve
+        } else {
+            PixelFormatCapabilities::all()
+        }
+    }
+
+    pub fn r16_uint_capabilities(&self) -> PixelFormatCapabilities {
+        PixelFormatCapabilities::Write
+            | PixelFormatCapabilities::Color
+            | PixelFormatCapabilities::Msaa
+    }
+
+    pub fn r16_sint_capabilities(&self) -> PixelFormatCapabilities {
+        PixelFormatCapabilities::Write
+            | PixelFormatCapabilities::Color
+            | PixelFormatCapabilities::Msaa
+    }
+
+    pub fn r16_float_capabilities(&self) -> PixelFormatCapabilities {
+        PixelFormatCapabilities::all()
+    }
+
+    pub fn rg8_unorm_capabilities(&self) -> PixelFormatCapabilities {
+        PixelFormatCapabilities::all()
+    }
+
+    pub fn rg8_unorm_srgb_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() == OS::macOS {
+            PixelFormatCapabilities::empty()
+        } else if self.supports_srgb_writes() {
+            PixelFormatCapabilities::all()
+        } else {
+            !PixelFormatCapabilities::Write
+        }
+    }
+
+    pub fn rg8_snorm_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() == OS::iOS && self.gpu_family() == 1 {
+            !PixelFormatCapabilities::Resolve
+        } else {
+            PixelFormatCapabilities::all()
+        }
+    }
+
+    pub fn rg8_uint_capabilities(&self) -> PixelFormatCapabilities {
+        PixelFormatCapabilities::Write
+            | PixelFormatCapabilities::Color
+            | PixelFormatCapabilities::Msaa
+    }
+
+    pub fn rg8_sint_capabilities(&self) -> PixelFormatCapabilities {
+        PixelFormatCapabilities::Write
+            | PixelFormatCapabilities::Color
+            | PixelFormatCapabilities::Msaa
+    }
+
+    pub fn b5_g6_r5_unorm_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() == OS::macOS {
+            PixelFormatCapabilities::empty()
+        } else {
+            !PixelFormatCapabilities::Write
+        }
+    }
+
+    pub fn a1_bgr5_unorm_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() == OS::macOS {
+            PixelFormatCapabilities::empty()
+        } else {
+            !PixelFormatCapabilities::Write
+        }
+    }
+
+    pub fn abgr4_unorm_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() == OS::macOS {
+            PixelFormatCapabilities::empty()
+        } else {
+            !PixelFormatCapabilities::Write
+        }
+    }
+
+    pub fn bgr5_a1_unorm_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() == OS::macOS {
+            PixelFormatCapabilities::empty()
+        } else {
+            !PixelFormatCapabilities::Write
+        }
+    }
+
+    pub fn r32_uint_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() == OS::iOS && self.os_version() == 8 {
+            PixelFormatCapabilities::Color
+        } else if self.os() == OS::macOS {
+            PixelFormatCapabilities::Color
+                | PixelFormatCapabilities::Write
+                | PixelFormatCapabilities::Msaa
+        } else {
+            PixelFormatCapabilities::Color | PixelFormatCapabilities::Write
+        }
+    }
+
+    pub fn r32_sint_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() == OS::iOS && self.os_version() == 8 {
+            PixelFormatCapabilities::Color
+        } else if self.os() == OS::macOS {
+            PixelFormatCapabilities::Color
+                | PixelFormatCapabilities::Write
+                | PixelFormatCapabilities::Msaa
+        } else {
+            PixelFormatCapabilities::Color | PixelFormatCapabilities::Write
+        }
+    }
+
+    pub fn r32_float_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() == OS::iOS && self.os_version() == 8 {
+            PixelFormatCapabilities::Color
+                | PixelFormatCapabilities::Blend
+                | PixelFormatCapabilities::Msaa
+        } else if self.os() == OS::macOS {
+            PixelFormatCapabilities::all()
+        } else {
+            PixelFormatCapabilities::Write
+                | PixelFormatCapabilities::Color
+                | PixelFormatCapabilities::Blend
+                | PixelFormatCapabilities::Msaa
+        }
+    }
+
+    pub fn rg16_unorm_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() == OS::macOS {
+            PixelFormatCapabilities::all()
+        } else {
+            !PixelFormatCapabilities::Resolve
+        }
+    }
+
+    pub fn rg16_snorm_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() == OS::macOS {
+            PixelFormatCapabilities::all()
+        } else {
+            !PixelFormatCapabilities::Resolve
+        }
+    }
+
+    pub fn rg16_uint_capabilities(&self) -> PixelFormatCapabilities {
+        PixelFormatCapabilities::Write
+            | PixelFormatCapabilities::Color
+            | PixelFormatCapabilities::Msaa
+    }
+
+    pub fn rg16_sint_capabilities(&self) -> PixelFormatCapabilities {
+        PixelFormatCapabilities::Write
+            | PixelFormatCapabilities::Color
+            | PixelFormatCapabilities::Msaa
+    }
+
+    pub fn rg16_float_capabilities(&self) -> PixelFormatCapabilities {
+        PixelFormatCapabilities::all()
+    }
+
+    pub fn rgba8_unorm_capabilities(&self) -> PixelFormatCapabilities {
+        PixelFormatCapabilities::all()
+    }
+
+    pub fn rgba8_unorm_srgb_capabilities(&self) -> PixelFormatCapabilities {
+        if self.supports_srgb_writes() {
+            PixelFormatCapabilities::all()
+        } else {
+            !PixelFormatCapabilities::Write
+        }
+    }
+
+    pub fn rgba8_snorm_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() == OS::iOS && self.gpu_family() == 1 {
+            !PixelFormatCapabilities::Resolve
+        } else {
+            PixelFormatCapabilities::all()
+        }
+    }
+
+    pub fn rgba8_uint_capabilities(&self) -> PixelFormatCapabilities {
+        PixelFormatCapabilities::Write
+            | PixelFormatCapabilities::Color
+            | PixelFormatCapabilities::Msaa
+    }
+
+    pub fn rgba8_sint_capabilities(&self) -> PixelFormatCapabilities {
+        PixelFormatCapabilities::Write
+            | PixelFormatCapabilities::Color
+            | PixelFormatCapabilities::Msaa
+    }
+
+    pub fn bgra8_unorm_capabilities(&self) -> PixelFormatCapabilities {
+        PixelFormatCapabilities::all()
+    }
+
+    pub fn bgra8_unorm_srgb_capabilities(&self) -> PixelFormatCapabilities {
+        if self.supports_srgb_writes() {
+            PixelFormatCapabilities::all()
+        } else {
+            !PixelFormatCapabilities::Write
+        }
+    }
+
+    pub fn rgb10_a2_unorm_capabilities(&self) -> PixelFormatCapabilities {
+        let supports_writes = match self.os() {
+            OS::iOS => self.gpu_family() >= 3,
+            OS::tvOS => self.gpu_family() >= 2,
+            OS::macOS => true,
+        };
+        if supports_writes {
+            PixelFormatCapabilities::all()
+        } else {
+            !PixelFormatCapabilities::Write
+        }
+    }
+
+    pub fn rgb10_a2_uint_capabilities(&self) -> PixelFormatCapabilities {
+        let supports_writes = match self.os() {
+            OS::iOS => self.gpu_family() >= 3,
+            OS::tvOS => self.gpu_family() >= 2,
+            OS::macOS => true,
+        };
+        if supports_writes {
+            PixelFormatCapabilities::Write
+                | PixelFormatCapabilities::Color
+                | PixelFormatCapabilities::Msaa
+        } else {
+            PixelFormatCapabilities::Color | PixelFormatCapabilities::Msaa
+        }
+    }
+
+    pub fn rg11_b10_float_capabilities(&self) -> PixelFormatCapabilities {
+        let supports_writes = match self.os() {
+            OS::iOS => self.gpu_family() >= 3,
+            OS::tvOS => self.gpu_family() >= 2,
+            OS::macOS => true,
+        };
+        if supports_writes {
+            PixelFormatCapabilities::all()
+        } else {
+            !PixelFormatCapabilities::Write
+        }
+    }
+
+    pub fn rgb9_e5_float_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() == OS::macOS {
+            PixelFormatCapabilities::Filter
+        } else {
+            let supports_writes = match self.os() {
+                OS::iOS => self.gpu_family() >= 3,
+                OS::tvOS => self.gpu_family() >= 2,
+                OS::macOS => false,
+            };
+            if supports_writes {
+                PixelFormatCapabilities::all()
+            } else {
+                !PixelFormatCapabilities::Write
+            }
+        }
+    }
+
+    pub fn rg32_uint_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() == OS::iOS && self.os_version() == 8 {
+            PixelFormatCapabilities::Color
+        } else if self.os() == OS::macOS {
+            PixelFormatCapabilities::Color
+                | PixelFormatCapabilities::Write
+                | PixelFormatCapabilities::Msaa
+        } else {
+            PixelFormatCapabilities::Color | PixelFormatCapabilities::Write
+        }
+    }
+
+    pub fn rg32_sint_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() == OS::iOS && self.os_version() == 8 {
+            PixelFormatCapabilities::Color
+        } else if self.os() == OS::macOS {
+            PixelFormatCapabilities::Color
+                | PixelFormatCapabilities::Write
+                | PixelFormatCapabilities::Msaa
+        } else {
+            PixelFormatCapabilities::Color | PixelFormatCapabilities::Write
+        }
+    }
+
+    pub fn rg32_float_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() == OS::macOS {
+            PixelFormatCapabilities::all()
+        } else if self.os() == OS::iOS && self.os_version() == 8 {
+            PixelFormatCapabilities::Color | PixelFormatCapabilities::Blend
+        } else {
+            PixelFormatCapabilities::Write
+                | PixelFormatCapabilities::Color
+                | PixelFormatCapabilities::Blend
+        }
+    }
+
+    pub fn rgba16_unorm_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() == OS::macOS {
+            PixelFormatCapabilities::all()
+        } else {
+            !PixelFormatCapabilities::Write
+        }
+    }
+
+    pub fn rgba16_snorm_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() == OS::macOS {
+            PixelFormatCapabilities::all()
+        } else {
+            !PixelFormatCapabilities::Write
+        }
+    }
+
+    pub fn rgba16_uint_capabilities(&self) -> PixelFormatCapabilities {
+        PixelFormatCapabilities::Write
+            | PixelFormatCapabilities::Color
+            | PixelFormatCapabilities::Msaa
+    }
+
+    pub fn rgba16_sint_capabilities(&self) -> PixelFormatCapabilities {
+        PixelFormatCapabilities::Write
+            | PixelFormatCapabilities::Color
+            | PixelFormatCapabilities::Msaa
+    }
+
+    pub fn rgba16_float_capabilities(&self) -> PixelFormatCapabilities {
+        PixelFormatCapabilities::all()
+    }
+
+    pub fn rgba32_uint_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() == OS::iOS && self.os_version() == 8 {
+            PixelFormatCapabilities::Color
+        } else if self.os() == OS::macOS {
+            PixelFormatCapabilities::Color
+                | PixelFormatCapabilities::Write
+                | PixelFormatCapabilities::Msaa
+        } else {
+            PixelFormatCapabilities::Color | PixelFormatCapabilities::Write
+        }
+    }
+
+    pub fn rgba32_sint_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() == OS::iOS && self.os_version() == 8 {
+            PixelFormatCapabilities::Color
+        } else if self.os() == OS::macOS {
+            PixelFormatCapabilities::Color
+                | PixelFormatCapabilities::Write
+                | PixelFormatCapabilities::Msaa
+        } else {
+            PixelFormatCapabilities::Color | PixelFormatCapabilities::Write
+        }
+    }
+
+    pub fn rgba32_float_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() == OS::macOS {
+            PixelFormatCapabilities::all()
+        } else if self.os() == OS::iOS && self.version() == 8 {
+            PixelFormatCapabilities::Color
+        } else {
+            PixelFormatCapabilities::Write | PixelFormatCapabilities::Color
+        }
+    }
+
+    pub fn pvrtc_pixel_formats_capabilities(&self) -> PixelFormatCapabilities {
+        if self.supports_pvrtc_pixel_formats() {
+            PixelFormatCapabilities::Filter
+        } else {
+            PixelFormatCapabilities::empty()
+        }
+    }
+
+    pub fn eac_etc_pixel_formats_capabilities(&self) -> PixelFormatCapabilities {
+        if self.supports_eac_etc_pixel_formats() {
+            PixelFormatCapabilities::Filter
+        } else {
+            PixelFormatCapabilities::empty()
+        }
+    }
+
+    pub fn astc_pixel_formats_capabilities(&self) -> PixelFormatCapabilities {
+        if self.supports_astc_pixel_formats() {
+            PixelFormatCapabilities::Filter
+        } else {
+            PixelFormatCapabilities::empty()
+        }
+    }
+
+    pub fn bc_pixel_formats_capabilities(&self) -> PixelFormatCapabilities {
+        if self.supports_bc_pixel_formats() {
+            PixelFormatCapabilities::Filter
+        } else {
+            PixelFormatCapabilities::empty()
+        }
+    }
+
+    pub fn gbgr422_capabilities(&self) -> PixelFormatCapabilities {
+        PixelFormatCapabilities::Filter
+    }
+
+    pub fn bgrg422_capabilities(&self) -> PixelFormatCapabilities {
+        PixelFormatCapabilities::Filter
+    }
+
+    pub fn depth16_unorm_capabilities(&self) -> PixelFormatCapabilities {
+        if self.supports_depth_16_pixel_format() {
+            PixelFormatCapabilities::Filter
+                | PixelFormatCapabilities::Msaa
+                | PixelFormatCapabilities::Resolve
+        } else {
+            PixelFormatCapabilities::empty()
+        }
+    }
+
+    pub fn depth32_float_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() == OS::macOS {
+            PixelFormatCapabilities::Filter
+                | PixelFormatCapabilities::Msaa
+                | PixelFormatCapabilities::Resolve
+        } else if self.supports_msaa_depth_resolve() {
+            PixelFormatCapabilities::Msaa | PixelFormatCapabilities::Resolve
+        } else {
+            PixelFormatCapabilities::Msaa
+        }
+    }
+
+    pub fn stencil8_capabilities(&self) -> PixelFormatCapabilities {
+        PixelFormatCapabilities::Msaa
+    }
+
+    pub fn depth24_unorm_stencil8_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() == OS::macOS {
+            PixelFormatCapabilities::Filter
+                | PixelFormatCapabilities::Msaa
+                | PixelFormatCapabilities::Resolve
+        } else {
+            PixelFormatCapabilities::empty()
+        }
+    }
+
+    pub fn depth32_float_stencil8_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() == OS::macOS {
+            PixelFormatCapabilities::Filter
+                | PixelFormatCapabilities::Msaa
+                | PixelFormatCapabilities::Resolve
+        } else if self.supports_msaa_depth_resolve() {
+            PixelFormatCapabilities::Msaa | PixelFormatCapabilities::Resolve
+        } else {
+            PixelFormatCapabilities::Msaa
+        }
+    }
+
+    pub fn x24_stencil8_capabilities(&self) -> PixelFormatCapabilities {
+        if self.os() == OS::macOS {
+            PixelFormatCapabilities::Msaa
+        } else {
+            PixelFormatCapabilities::empty()
+        }
+    }
+
+    pub fn x32_stencil8_capabilities(&self) -> PixelFormatCapabilities {
+        PixelFormatCapabilities::Msaa
+    }
+
+    pub fn bgra10_xr_capabilities(&self) -> PixelFormatCapabilities {
+        if self.supports_extended_range_pixel_formats() {
+            PixelFormatCapabilities::all()
+        } else {
+            PixelFormatCapabilities::empty()
+        }
+    }
+
+    pub fn bgra10_xr_srgb_capabilities(&self) -> PixelFormatCapabilities {
+        if self.supports_extended_range_pixel_formats() {
+            PixelFormatCapabilities::all()
+        } else {
+            PixelFormatCapabilities::empty()
+        }
+    }
+
+    pub fn bgr10_xr_capabilities(&self) -> PixelFormatCapabilities {
+        if self.supports_extended_range_pixel_formats() {
+            PixelFormatCapabilities::all()
+        } else {
+            PixelFormatCapabilities::empty()
+        }
+    }
+
+    pub fn bgr10_xr_srgb_capabilities(&self) -> PixelFormatCapabilities {
+        if self.supports_extended_range_pixel_formats() {
+            PixelFormatCapabilities::all()
+        } else {
+            PixelFormatCapabilities::empty()
+        }
+    }
+
+    pub fn bgr10_a2_unorm_capabilities(&self) -> PixelFormatCapabilities {
+        if self.supports_wide_color_pixel_format() {
+            if self.os() == OS::macOS {
+                !PixelFormatCapabilities::Write
+            } else {
+                PixelFormatCapabilities::all()
+            }
+        } else {
+            PixelFormatCapabilities::empty()
+        }
+    }
+}
+
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLArgumentBuffersTier {
+    Tier1 = 0,
+    Tier2 = 1,
+}
+
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLReadWriteTextureTier {
+    TierNone = 0,
+    Tier1 = 1,
+    Tier2 = 2,
+}
+
+/// Only available on (macos(11.0), ios(14.0))
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLCounterSamplingPoint {
+    AtStageBoundary = 0,
+    AtDrawBoundary = 1,
+    AtDispatchBoundary = 2,
+    AtTileDispatchBoundary = 3,
+    AtBlitBoundary = 4,
+}
+
+/// Only available on (macos(11.0), macCatalyst(14.0), ios(13.0))
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLSparseTextureRegionAlignmentMode {
+    Outward = 0,
+    Inward = 1,
+}
+
+bitflags! {
+    /// Options that determine how Metal prepares the pipeline.
+    pub struct MTLPipelineOption: NSUInteger {
+        /// Do not provide any reflection information.
+        const None                      = 0;
+        /// An option that requests argument information for buffers, textures, and threadgroup memory.
+        const ArgumentInfo              = 1 << 0;
+        /// An option that requests detailed buffer type information for buffer arguments.
+        const BufferTypeInfo            = 1 << 1;
+        /// An option that specifies that Metal should create the pipeline state object only if the
+        /// compiled shader is present inside the binary archive.
+        ///
+        /// Only available on (macos(11.0), ios(14.0))
+        const FailOnBinaryArchiveMiss   = 1 << 2;
+    }
+}
+
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+#[repr(C)]
+pub struct MTLAccelerationStructureSizes {
+    pub acceleration_structure_size: NSUInteger,
+    pub build_scratch_buffer_size: NSUInteger,
+    pub refit_scratch_buffer_size: NSUInteger,
+}
+
+#[link(name = "Metal", kind = "framework")]
+extern "C" {
+    fn MTLCreateSystemDefaultDevice() -> *mut MTLDevice;
+    #[cfg(not(target_os = "ios"))]
+    fn MTLCopyAllDevices() -> *mut Object; //TODO: Array
+}
+
+#[allow(non_camel_case_types)]
+type dispatch_data_t = *mut Object;
+#[allow(non_camel_case_types)]
+pub type dispatch_queue_t = *mut Object;
+#[allow(non_camel_case_types)]
+type dispatch_block_t = *const Block<(), ()>;
+
+#[cfg_attr(
+    any(target_os = "macos", target_os = "ios"),
+    link(name = "System", kind = "dylib")
+)]
+#[cfg_attr(
+    not(any(target_os = "macos", target_os = "ios")),
+    link(name = "dispatch", kind = "dylib")
+)]
+#[allow(improper_ctypes)]
+extern "C" {
+    static _dispatch_main_q: dispatch_queue_t;
+
+    fn dispatch_data_create(
+        buffer: *const std::ffi::c_void,
+        size: crate::c_size_t,
+        queue: dispatch_queue_t,
+        destructor: dispatch_block_t,
+    ) -> dispatch_data_t;
+    fn dispatch_release(object: dispatch_data_t); // actually dispatch_object_t
+}
+
+/*type MTLNewLibraryCompletionHandler = extern fn(library: id, error: id);
+type MTLNewRenderPipelineStateCompletionHandler = extern fn(renderPipelineState: id, error: id);
+type MTLNewRenderPipelineStateWithReflectionCompletionHandler = extern fn(renderPipelineState: id, reflection: id, error: id);
+type MTLNewComputePipelineStateCompletionHandler = extern fn(computePipelineState: id, error: id);
+type MTLNewComputePipelineStateWithReflectionCompletionHandler = extern fn(computePipelineState: id, reflection: id, error: id);*/
+
+pub enum MTLDevice {}
+
+foreign_obj_type! {
+    type CType = MTLDevice;
+    pub struct Device;
+    pub struct DeviceRef;
+}
+
+impl Device {
+    pub fn system_default() -> Option<Self> {
+        // `MTLCreateSystemDefaultDevice` may return null if Metal is not supported
+        unsafe { MTLCreateSystemDefaultDevice().as_mut().map(|x| Self(x)) }
+    }
+
+    pub fn all() -> Vec<Self> {
+        #[cfg(target_os = "ios")]
+        {
+            Self::system_default().into_iter().collect()
+        }
+        #[cfg(not(target_os = "ios"))]
+        unsafe {
+            let array = MTLCopyAllDevices();
+            let count: NSUInteger = msg_send![array, count];
+            let ret = (0..count)
+                .map(|i| msg_send![array, objectAtIndex: i])
+                // The elements of this array are references---we convert them to owned references
+                // (which just means that we increment the reference count here, and it is
+                // decremented in the `Drop` impl for `Device`)
+                .map(|device: *mut Object| msg_send![device, retain])
+                .collect();
+            let () = msg_send![array, release];
+            ret
+        }
+    }
+}
+
+impl DeviceRef {
+    pub fn name(&self) -> &str {
+        unsafe {
+            let name = msg_send![self, name];
+            crate::nsstring_as_str(name)
+        }
+    }
+
+    #[cfg(feature = "private")]
+    pub unsafe fn vendor(&self) -> &str {
+        let name = msg_send![self, vendorName];
+        crate::nsstring_as_str(name)
+    }
+
+    #[cfg(feature = "private")]
+    pub unsafe fn family_name(&self) -> &str {
+        let name = msg_send![self, familyName];
+        crate::nsstring_as_str(name)
+    }
+
+    pub fn registry_id(&self) -> u64 {
+        unsafe { msg_send![self, registryID] }
+    }
+
+    pub fn location(&self) -> MTLDeviceLocation {
+        unsafe { msg_send![self, location] }
+    }
+
+    pub fn location_number(&self) -> NSUInteger {
+        unsafe { msg_send![self, locationNumber] }
+    }
+
+    pub fn max_threadgroup_memory_length(&self) -> NSUInteger {
+        unsafe { msg_send![self, maxThreadgroupMemoryLength] }
+    }
+
+    pub fn max_threads_per_threadgroup(&self) -> MTLSize {
+        unsafe { msg_send![self, maxThreadsPerThreadgroup] }
+    }
+
+    pub fn is_low_power(&self) -> bool {
+        unsafe {
+            match msg_send![self, isLowPower] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn is_headless(&self) -> bool {
+        unsafe {
+            match msg_send![self, isHeadless] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn is_removable(&self) -> bool {
+        unsafe {
+            match msg_send![self, isRemovable] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn supports_raytracing(&self) -> bool {
+        unsafe {
+            match msg_send![self, supportsRaytracing] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn has_unified_memory(&self) -> bool {
+        unsafe {
+            match msg_send![self, hasUnifiedMemory] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn recommended_max_working_set_size(&self) -> u64 {
+        unsafe { msg_send![self, recommendedMaxWorkingSetSize] }
+    }
+
+    pub fn max_transfer_rate(&self) -> u64 {
+        unsafe { msg_send![self, maxTransferRate] }
+    }
+
+    pub fn supports_feature_set(&self, feature: MTLFeatureSet) -> bool {
+        unsafe {
+            match msg_send![self, supportsFeatureSet: feature] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn supports_family(&self, family: MTLGPUFamily) -> bool {
+        unsafe {
+            match msg_send![self, supportsFamily: family] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn supports_vertex_amplification_count(&self, count: NSUInteger) -> bool {
+        unsafe {
+            match msg_send![self, supportsVertexAmplificationCount: count] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn supports_texture_sample_count(&self, count: NSUInteger) -> bool {
+        unsafe {
+            match msg_send![self, supportsTextureSampleCount: count] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn supports_shader_barycentric_coordinates(&self) -> bool {
+        unsafe {
+            match msg_send![self, supportsShaderBarycentricCoordinates] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn supports_function_pointers(&self) -> bool {
+        unsafe {
+            match msg_send![self, supportsFunctionPointers] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn supports_dynamic_libraries(&self) -> bool {
+        unsafe {
+            match msg_send![self, supportsDynamicLibraries] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn supports_counter_sampling(&self, sampling_point: MTLCounterSamplingPoint) -> bool {
+        unsafe {
+            match msg_send![self, supportsCounterSampling: sampling_point] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn d24_s8_supported(&self) -> bool {
+        unsafe {
+            match msg_send![self, isDepth24Stencil8PixelFormatSupported] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn new_fence(&self) -> Fence {
+        unsafe { msg_send![self, newFence] }
+    }
+
+    pub fn new_command_queue(&self) -> CommandQueue {
+        unsafe { msg_send![self, newCommandQueue] }
+    }
+
+    pub fn new_command_queue_with_max_command_buffer_count(
+        &self,
+        count: NSUInteger,
+    ) -> CommandQueue {
+        unsafe { msg_send![self, newCommandQueueWithMaxCommandBufferCount: count] }
+    }
+
+    pub fn new_default_library(&self) -> Library {
+        unsafe { msg_send![self, newDefaultLibrary] }
+    }
+
+    pub fn new_library_with_source(
+        &self,
+        src: &str,
+        options: &CompileOptionsRef,
+    ) -> Result<Library, String> {
+        let source = nsstring_from_str(src);
+        unsafe {
+            let mut err: *mut Object = ptr::null_mut();
+            let library: *mut MTLLibrary = msg_send![self, newLibraryWithSource:source
+                                                                        options:options
+                                                                          error:&mut err];
+            if !err.is_null() {
+                let desc: *mut Object = msg_send![err, localizedDescription];
+                let compile_error: *const c_char = msg_send![desc, UTF8String];
+                let message = CStr::from_ptr(compile_error).to_string_lossy().into_owned();
+                if library.is_null() {
+                    return Err(message);
+                } else {
+                    warn!("Shader warnings: {}", message);
+                }
+            }
+
+            assert!(!library.is_null());
+            Ok(Library::from_ptr(library))
+        }
+    }
+
+    pub fn new_library_with_file<P: AsRef<Path>>(&self, file: P) -> Result<Library, String> {
+        let filename = nsstring_from_str(file.as_ref().to_string_lossy().as_ref());
+        unsafe {
+            let library: *mut MTLLibrary = try_objc! { err =>
+                msg_send![self, newLibraryWithFile:filename.as_ref()
+                                             error:&mut err]
+            };
+            Ok(Library::from_ptr(library))
+        }
+    }
+
+    pub fn new_library_with_data(&self, library_data: &[u8]) -> Result<Library, String> {
+        unsafe {
+            let destructor_block = ConcreteBlock::new(|| {}).copy();
+            let data = dispatch_data_create(
+                library_data.as_ptr() as *const std::ffi::c_void,
+                library_data.len() as crate::c_size_t,
+                &_dispatch_main_q as *const _ as dispatch_queue_t,
+                &*destructor_block.deref(),
+            );
+
+            let library: *mut MTLLibrary = try_objc! { err =>
+                 msg_send![self, newLibraryWithData:data
+                                              error:&mut err]
+            };
+            dispatch_release(data);
+            Ok(Library::from_ptr(library))
+        }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn new_dynamic_library(&self, library: &LibraryRef) -> Result<DynamicLibrary, String> {
+        unsafe {
+            let mut err: *mut Object = ptr::null_mut();
+            let dynamic_library: *mut MTLDynamicLibrary = msg_send![self, newDynamicLibrary:library
+                                                                                      error:&mut err];
+            if !err.is_null() {
+                // FIXME: copy pasta
+                let desc: *mut Object = msg_send![err, localizedDescription];
+                let compile_error: *const c_char = msg_send![desc, UTF8String];
+                let message = CStr::from_ptr(compile_error).to_string_lossy().into_owned();
+                Err(message)
+            } else {
+                Ok(DynamicLibrary::from_ptr(dynamic_library))
+            }
+        }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn new_dynamic_library_with_url(&self, url: &URLRef) -> Result<DynamicLibrary, String> {
+        unsafe {
+            let mut err: *mut Object = ptr::null_mut();
+            let dynamic_library: *mut MTLDynamicLibrary = msg_send![self, newDynamicLibraryWithURL:url
+                                                                                             error:&mut err];
+            if !err.is_null() {
+                // FIXME: copy pasta
+                let desc: *mut Object = msg_send![err, localizedDescription];
+                let compile_error: *const c_char = msg_send![desc, UTF8String];
+                let message = CStr::from_ptr(compile_error).to_string_lossy().into_owned();
+                Err(message)
+            } else {
+                Ok(DynamicLibrary::from_ptr(dynamic_library))
+            }
+        }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn new_binary_archive_with_descriptor(
+        &self,
+        descriptor: &BinaryArchiveDescriptorRef,
+    ) -> Result<BinaryArchive, String> {
+        unsafe {
+            let mut err: *mut Object = ptr::null_mut();
+            let binary_archive: *mut MTLBinaryArchive = msg_send![self, newBinaryArchiveWithDescriptor:descriptor
+                                                     error:&mut err];
+            if !err.is_null() {
+                // TODO: copy pasta
+                let desc: *mut Object = msg_send![err, localizedDescription];
+                let c_msg: *const c_char = msg_send![desc, UTF8String];
+                let message = CStr::from_ptr(c_msg).to_string_lossy().into_owned();
+                Err(message)
+            } else {
+                Ok(BinaryArchive::from_ptr(binary_archive))
+            }
+        }
+    }
+
+    /// Synchronously creates a render pipeline state object and associated reflection information.
+    pub fn new_render_pipeline_state_with_reflection(
+        &self,
+        descriptor: &RenderPipelineDescriptorRef,
+        reflection_options: MTLPipelineOption,
+    ) -> Result<(RenderPipelineState, RenderPipelineReflection), String> {
+        unsafe {
+            let mut reflection: *mut Object = ptr::null_mut();
+            let pipeline_state: *mut MTLRenderPipelineState = try_objc! { err =>
+                msg_send![self, newRenderPipelineStateWithDescriptor:descriptor
+                                                             options:reflection_options
+                                                          reflection:&mut reflection
+                                                               error:&mut err]
+            };
+
+            let state = RenderPipelineState::from_ptr(pipeline_state);
+
+            let () = msg_send![reflection, retain];
+            let reflection = RenderPipelineReflection::from_ptr(reflection as _);
+
+            Ok((state, reflection))
+        }
+    }
+
+    pub fn new_render_pipeline_state(
+        &self,
+        descriptor: &RenderPipelineDescriptorRef,
+    ) -> Result<RenderPipelineState, String> {
+        unsafe {
+            let pipeline_state: *mut MTLRenderPipelineState = try_objc! { err =>
+                msg_send![self, newRenderPipelineStateWithDescriptor:descriptor
+                                                               error:&mut err]
+            };
+
+            Ok(RenderPipelineState::from_ptr(pipeline_state))
+        }
+    }
+
+    pub fn new_compute_pipeline_state_with_function(
+        &self,
+        function: &FunctionRef,
+    ) -> Result<ComputePipelineState, String> {
+        unsafe {
+            let pipeline_state: *mut MTLComputePipelineState = try_objc! { err =>
+                msg_send![self, newComputePipelineStateWithFunction:function
+                                                              error:&mut err]
+            };
+
+            Ok(ComputePipelineState::from_ptr(pipeline_state))
+        }
+    }
+
+    pub fn new_compute_pipeline_state(
+        &self,
+        descriptor: &ComputePipelineDescriptorRef,
+    ) -> Result<ComputePipelineState, String> {
+        unsafe {
+            let pipeline_state: *mut MTLComputePipelineState = try_objc! { err =>
+                msg_send![self, newComputePipelineStateWithDescriptor:descriptor
+                                                                error:&mut err]
+            };
+
+            Ok(ComputePipelineState::from_ptr(pipeline_state))
+        }
+    }
+
+    /// Synchronously creates a compute pipeline state object and associated reflection information,
+    /// using a compute pipeline descriptor.
+    pub fn new_compute_pipeline_state_with_reflection(
+        &self,
+        descriptor: &ComputePipelineDescriptorRef,
+        reflection_options: MTLPipelineOption,
+    ) -> Result<(ComputePipelineState, ComputePipelineReflection), String> {
+        unsafe {
+            let mut reflection: *mut Object = ptr::null_mut();
+            let pipeline_state: *mut MTLComputePipelineState = try_objc! { err =>
+                msg_send![self, newComputePipelineStateWithDescriptor:descriptor
+                                                             options:reflection_options
+                                                          reflection:&mut reflection
+                                                               error:&mut err]
+            };
+
+            let state = ComputePipelineState::from_ptr(pipeline_state);
+
+            let () = msg_send![reflection, retain];
+            let reflection = ComputePipelineReflection::from_ptr(reflection as _);
+
+            Ok((state, reflection))
+        }
+    }
+
+    pub fn new_buffer(&self, length: u64, options: MTLResourceOptions) -> Buffer {
+        unsafe {
+            msg_send![self, newBufferWithLength:length
+                                        options:options]
+        }
+    }
+
+    pub fn new_buffer_with_bytes_no_copy(
+        &self,
+        bytes: *const std::ffi::c_void,
+        length: NSUInteger,
+        options: MTLResourceOptions,
+        deallocator: Option<&Block<(*const std::ffi::c_void, NSUInteger), ()>>,
+    ) -> Buffer {
+        unsafe {
+            msg_send![self, newBufferWithBytesNoCopy:bytes
+                length:length
+                options:options
+                deallocator:deallocator]
+        }
+    }
+
+    pub fn new_buffer_with_data(
+        &self,
+        bytes: *const std::ffi::c_void,
+        length: NSUInteger,
+        options: MTLResourceOptions,
+    ) -> Buffer {
+        unsafe {
+            msg_send![self, newBufferWithBytes:bytes
+                                        length:length
+                                       options:options]
+        }
+    }
+
+    pub fn new_texture(&self, descriptor: &TextureDescriptorRef) -> Texture {
+        unsafe { msg_send![self, newTextureWithDescriptor: descriptor] }
+    }
+
+    pub fn new_sampler(&self, descriptor: &SamplerDescriptorRef) -> SamplerState {
+        unsafe { msg_send![self, newSamplerStateWithDescriptor: descriptor] }
+    }
+
+    pub fn new_depth_stencil_state(
+        &self,
+        descriptor: &DepthStencilDescriptorRef,
+    ) -> DepthStencilState {
+        unsafe { msg_send![self, newDepthStencilStateWithDescriptor: descriptor] }
+    }
+
+    pub fn argument_buffers_support(&self) -> MTLArgumentBuffersTier {
+        unsafe { msg_send![self, argumentBuffersSupport] }
+    }
+
+    pub fn read_write_texture_support(&self) -> MTLReadWriteTextureTier {
+        unsafe { msg_send![self, readWriteTextureSupport] }
+    }
+
+    pub fn raster_order_groups_supported(&self) -> bool {
+        unsafe {
+            match msg_send![self, rasterOrderGroupsSupported] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn supports_32bit_float_filtering(&self) -> bool {
+        unsafe {
+            match msg_send![self, supports32BitFloatFiltering] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn supports_32bit_MSAA(&self) -> bool {
+        unsafe {
+            match msg_send![self, supports32BitMSAA] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn supports_query_texture_LOD(&self) -> bool {
+        unsafe {
+            match msg_send![self, supportsQueryTextureLOD] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn supports_BC_texture_compression(&self) -> bool {
+        unsafe {
+            match msg_send![self, supportsBCTextureCompression] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn supports_pull_model_interpolation(&self) -> bool {
+        unsafe {
+            match msg_send![self, supportsPullModelInterpolation] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn new_argument_encoder(
+        &self,
+        arguments: &ArrayRef<ArgumentDescriptor>,
+    ) -> ArgumentEncoder {
+        unsafe { msg_send![self, newArgumentEncoderWithArguments: arguments] }
+    }
+
+    pub fn new_heap(&self, descriptor: &HeapDescriptorRef) -> Heap {
+        unsafe { msg_send![self, newHeapWithDescriptor: descriptor] }
+    }
+
+    pub fn new_event(&self) -> Event {
+        unsafe { msg_send![self, newEvent] }
+    }
+
+    pub fn new_shared_event(&self) -> SharedEvent {
+        unsafe { msg_send![self, newSharedEvent] }
+    }
+
+    pub fn heap_buffer_size_and_align(
+        &self,
+        length: NSUInteger,
+        options: MTLResourceOptions,
+    ) -> MTLSizeAndAlign {
+        unsafe { msg_send![self, heapBufferSizeAndAlignWithLength: length options: options] }
+    }
+
+    pub fn heap_texture_size_and_align(
+        &self,
+        descriptor: &TextureDescriptorRef,
+    ) -> MTLSizeAndAlign {
+        unsafe { msg_send![self, heapTextureSizeAndAlignWithDescriptor: descriptor] }
+    }
+
+    pub fn minimum_linear_texture_alignment_for_pixel_format(
+        &self,
+        format: MTLPixelFormat,
+    ) -> NSUInteger {
+        unsafe { msg_send![self, minimumLinearTextureAlignmentForPixelFormat: format] }
+    }
+
+    pub fn minimum_texture_buffer_alignment_for_pixel_format(
+        &self,
+        format: MTLPixelFormat,
+    ) -> NSUInteger {
+        unsafe { msg_send![self, minimumTextureBufferAlignmentForPixelFormat: format] }
+    }
+
+    pub fn max_argument_buffer_sampler_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, maxArgumentBufferSamplerCount] }
+    }
+
+    pub fn current_allocated_size(&self) -> NSUInteger {
+        unsafe { msg_send![self, currentAllocatedSize] }
+    }
+
+    /// Only available on (macos(10.14), ios(12.0), tvos(12.0))
+    pub fn max_buffer_length(&self) -> NSUInteger {
+        unsafe { msg_send![self, maxBufferLength] }
+    }
+}
diff --git a/third_party/rust/metal/src/drawable.rs b/third_party/rust/metal/src/drawable.rs
new file mode 100644
index 0000000000..a1ab789b7f
--- /dev/null
+++ b/third_party/rust/metal/src/drawable.rs
@@ -0,0 +1,26 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::NSUInteger;
+
+pub enum MTLDrawable {}
+
+foreign_obj_type! {
+    type CType = MTLDrawable;
+    pub struct Drawable;
+    pub struct DrawableRef;
+}
+
+impl DrawableRef {
+    pub fn present(&self) {
+        unsafe { msg_send![self, present] }
+    }
+
+    pub fn drawable_id(&self) -> NSUInteger {
+        unsafe { msg_send![self, drawableID] }
+    }
+}
diff --git a/third_party/rust/metal/src/encoder.rs b/third_party/rust/metal/src/encoder.rs
new file mode 100644
index 0000000000..36c44c28ba
--- /dev/null
+++ b/third_party/rust/metal/src/encoder.rs
@@ -0,0 +1,1376 @@
+// Copyright 2017 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+
+use std::ops::Range;
+
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLPrimitiveType {
+    Point = 0,
+    Line = 1,
+    LineStrip = 2,
+    Triangle = 3,
+    TriangleStrip = 4,
+}
+
+#[repr(u64)]
+#[allow(non_camel_case_types)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLIndexType {
+    UInt16 = 0,
+    UInt32 = 1,
+}
+
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLVisibilityResultMode {
+    Disabled = 0,
+    Boolean = 1,
+    Counting = 2,
+}
+
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLCullMode {
+    None = 0,
+    Front = 1,
+    Back = 2,
+}
+
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLWinding {
+    Clockwise = 0,
+    CounterClockwise = 1,
+}
+
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLDepthClipMode {
+    Clip = 0,
+    Clamp = 1,
+}
+
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLTriangleFillMode {
+    Fill = 0,
+    Lines = 1,
+}
+
+bitflags! {
+    /// https://developer.apple.com/documentation/metal/mtlblitoption
+    #[allow(non_upper_case_globals)]
+    pub struct MTLBlitOption: NSUInteger {
+        /// https://developer.apple.com/documentation/metal/mtlblitoption/mtlblitoptionnone
+        const None = 0;
+        /// https://developer.apple.com/documentation/metal/mtlblitoption/mtlblitoptiondepthfromdepthstencil
+        const DepthFromDepthStencil   = 1 << 0;
+        /// https://developer.apple.com/documentation/metal/mtlblitoption/mtlblitoptionstencilfromdepthstencil
+        const StencilFromDepthStencil = 1 << 1;
+        /// https://developer.apple.com/documentation/metal/mtlblitoption/mtlblitoptionrowlinearpvrtc
+        const RowLinearPVRTC          = 1 << 2;
+    }
+}
+
+#[repr(C)]
+#[derive(Copy, Clone, Debug)]
+pub struct MTLScissorRect {
+    pub x: NSUInteger,
+    pub y: NSUInteger,
+    pub width: NSUInteger,
+    pub height: NSUInteger,
+}
+
+#[repr(C)]
+#[derive(Copy, Clone, Debug)]
+pub struct MTLViewport {
+    pub originX: f64,
+    pub originY: f64,
+    pub width: f64,
+    pub height: f64,
+    pub znear: f64,
+    pub zfar: f64,
+}
+
+#[repr(C)]
+#[derive(Copy, Clone, Debug)]
+pub struct MTLDrawPrimitivesIndirectArguments {
+    pub vertexCount: u32,
+    pub instanceCount: u32,
+    pub vertexStart: u32,
+    pub baseInstance: u32,
+}
+
+#[repr(C)]
+#[derive(Copy, Clone, Debug)]
+pub struct MTLDrawIndexedPrimitivesIndirectArguments {
+    pub indexCount: u32,
+    pub instanceCount: u32,
+    pub indexStart: u32,
+    pub baseVertex: i32,
+    pub baseInstance: u32,
+}
+
+#[repr(C)]
+#[derive(Copy, Clone, Debug)]
+pub struct VertexAmplificationViewMapping {
+    pub renderTargetArrayIndexOffset: u32,
+    pub viewportArrayIndexOffset: u32,
+}
+
+pub enum MTLCommandEncoder {}
+
+foreign_obj_type! {
+    type CType = MTLCommandEncoder;
+    pub struct CommandEncoder;
+    pub struct CommandEncoderRef;
+}
+
+impl CommandEncoderRef {
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(label);
+            msg_send![self, setLabel: nslabel]
+        }
+    }
+
+    pub fn end_encoding(&self) {
+        unsafe { msg_send![self, endEncoding] }
+    }
+
+    pub fn insert_debug_signpost(&self, name: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(name);
+            msg_send![self, insertDebugSignpost: nslabel]
+        }
+    }
+
+    pub fn push_debug_group(&self, name: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(name);
+            msg_send![self, pushDebugGroup: nslabel]
+        }
+    }
+
+    pub fn pop_debug_group(&self) {
+        unsafe { msg_send![self, popDebugGroup] }
+    }
+}
+
+pub enum MTLParallelRenderCommandEncoder {}
+
+foreign_obj_type! {
+    type CType = MTLParallelRenderCommandEncoder;
+    pub struct ParallelRenderCommandEncoder;
+    pub struct ParallelRenderCommandEncoderRef;
+    type ParentType = CommandEncoderRef;
+}
+
+impl ParallelRenderCommandEncoderRef {
+    pub fn render_command_encoder(&self) -> &RenderCommandEncoderRef {
+        unsafe { msg_send![self, renderCommandEncoder] }
+    }
+}
+
+pub enum MTLRenderCommandEncoder {}
+
+foreign_obj_type! {
+    type CType = MTLRenderCommandEncoder;
+    pub struct RenderCommandEncoder;
+    pub struct RenderCommandEncoderRef;
+    type ParentType = CommandEncoderRef;
+}
+
+impl RenderCommandEncoderRef {
+    pub fn set_render_pipeline_state(&self, pipeline_state: &RenderPipelineStateRef) {
+        unsafe { msg_send![self, setRenderPipelineState: pipeline_state] }
+    }
+
+    pub fn set_viewport(&self, viewport: MTLViewport) {
+        unsafe { msg_send![self, setViewport: viewport] }
+    }
+
+    pub fn set_front_facing_winding(&self, winding: MTLWinding) {
+        unsafe { msg_send![self, setFrontFacingWinding: winding] }
+    }
+
+    pub fn set_cull_mode(&self, mode: MTLCullMode) {
+        unsafe { msg_send![self, setCullMode: mode] }
+    }
+
+    pub fn set_depth_clip_mode(&self, mode: MTLDepthClipMode) {
+        unsafe { msg_send![self, setDepthClipMode: mode] }
+    }
+
+    pub fn set_depth_bias(&self, bias: f32, scale: f32, clamp: f32) {
+        unsafe {
+            msg_send![self, setDepthBias:bias
+                              slopeScale:scale
+                                   clamp:clamp]
+        }
+    }
+
+    pub fn set_scissor_rect(&self, rect: MTLScissorRect) {
+        unsafe { msg_send![self, setScissorRect: rect] }
+    }
+
+    pub fn set_triangle_fill_mode(&self, mode: MTLTriangleFillMode) {
+        unsafe { msg_send![self, setTriangleFillMode: mode] }
+    }
+
+    pub fn set_blend_color(&self, red: f32, green: f32, blue: f32, alpha: f32) {
+        unsafe {
+            msg_send![self, setBlendColorRed:red
+                                         green:green
+                                          blue:blue
+                                         alpha:alpha]
+        }
+    }
+
+    pub fn set_depth_stencil_state(&self, depth_stencil_state: &DepthStencilStateRef) {
+        unsafe { msg_send![self, setDepthStencilState: depth_stencil_state] }
+    }
+
+    pub fn set_stencil_reference_value(&self, value: u32) {
+        unsafe { msg_send![self, setStencilReferenceValue: value] }
+    }
+
+    pub fn set_stencil_front_back_reference_value(&self, front: u32, back: u32) {
+        unsafe {
+            msg_send![self, setStencilFrontReferenceValue:front
+                                       backReferenceValue:back]
+        }
+    }
+
+    pub fn set_visibility_result_mode(&self, mode: MTLVisibilityResultMode, offset: NSUInteger) {
+        unsafe {
+            msg_send![self, setVisibilityResultMode:mode
+                                             offset:offset]
+        }
+    }
+
+    pub fn set_vertex_amplification_count(
+        &self,
+        count: NSUInteger,
+        view_mappings: Option<&[VertexAmplificationViewMapping]>,
+    ) {
+        unsafe {
+            msg_send! [self, setVertexAmplificationCount: count viewMappings: view_mappings.map_or(std::ptr::null(), |vm| vm.as_ptr())]
+        }
+    }
+
+    // Specifying Resources for a Vertex Shader Function
+
+    pub fn set_vertex_bytes(
+        &self,
+        index: NSUInteger,
+        length: NSUInteger,
+        bytes: *const std::ffi::c_void,
+    ) {
+        unsafe {
+            msg_send![self,
+                setVertexBytes:bytes
+                length:length
+                atIndex:index
+            ]
+        }
+    }
+
+    pub fn set_vertex_buffer(
+        &self,
+        index: NSUInteger,
+        buffer: Option<&BufferRef>,
+        offset: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                setVertexBuffer:buffer
+                offset:offset
+                atIndex:index
+            ]
+        }
+    }
+
+    pub fn set_vertex_buffer_offset(&self, index: NSUInteger, offset: NSUInteger) {
+        unsafe {
+            msg_send![self,
+                setVertexBufferOffset:offset
+                atIndex:index
+            ]
+        }
+    }
+
+    pub fn set_vertex_buffers(
+        &self,
+        start_index: NSUInteger,
+        data: &[Option<&BufferRef>],
+        offsets: &[NSUInteger],
+    ) {
+        debug_assert_eq!(offsets.len(), data.len());
+        unsafe {
+            msg_send![self,
+                setVertexBuffers: data.as_ptr()
+                offsets: offsets.as_ptr()
+                withRange: NSRange {
+                    location: start_index,
+                    length: data.len() as _,
+                }
+            ]
+        }
+    }
+
+    pub fn set_vertex_texture(&self, index: NSUInteger, texture: Option<&TextureRef>) {
+        unsafe {
+            msg_send![self,
+                setVertexTexture:texture
+                atIndex:index
+            ]
+        }
+    }
+
+    pub fn set_vertex_textures(&self, start_index: NSUInteger, data: &[Option<&TextureRef>]) {
+        unsafe {
+            msg_send![self,
+                setVertexTextures: data.as_ptr()
+                withRange: NSRange {
+                    location: start_index,
+                    length: data.len() as _,
+                }
+            ]
+        }
+    }
+
+    pub fn set_vertex_sampler_state(&self, index: NSUInteger, sampler: Option<&SamplerStateRef>) {
+        unsafe {
+            msg_send![self,
+                setVertexSamplerState:sampler
+                atIndex:index
+            ]
+        }
+    }
+
+    pub fn set_vertex_sampler_states(
+        &self,
+        start_index: NSUInteger,
+        data: &[Option<&SamplerStateRef>],
+    ) {
+        unsafe {
+            msg_send![self,
+                setVertexSamplerStates: data.as_ptr()
+                withRange: NSRange {
+                    location: start_index,
+                    length: data.len() as _,
+                }
+            ]
+        }
+    }
+
+    pub fn set_vertex_sampler_state_with_lod(
+        &self,
+        index: NSUInteger,
+        sampler: Option<&SamplerStateRef>,
+        lod_clamp: Range<f32>,
+    ) {
+        unsafe {
+            msg_send![self,
+                setVertexSamplerState:sampler
+                lodMinClamp:lod_clamp.start
+                lodMaxClamp:lod_clamp.end
+                atIndex:index
+            ]
+        }
+    }
+
+    // Specifying Resources for a Fragment Shader Function
+
+    pub fn set_fragment_bytes(
+        &self,
+        index: NSUInteger,
+        length: NSUInteger,
+        bytes: *const std::ffi::c_void,
+    ) {
+        unsafe {
+            msg_send![self,
+                setFragmentBytes:bytes
+                length:length
+                atIndex:index
+            ]
+        }
+    }
+
+    pub fn set_fragment_buffer(
+        &self,
+        index: NSUInteger,
+        buffer: Option<&BufferRef>,
+        offset: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                setFragmentBuffer:buffer
+                offset:offset
+                atIndex:index
+            ]
+        }
+    }
+
+    pub fn set_fragment_buffer_offset(&self, index: NSUInteger, offset: NSUInteger) {
+        unsafe {
+            msg_send![self,
+                setFragmentBufferOffset:offset
+                atIndex:index
+            ]
+        }
+    }
+
+    pub fn set_fragment_buffers(
+        &self,
+        start_index: NSUInteger,
+        data: &[Option<&BufferRef>],
+        offsets: &[NSUInteger],
+    ) {
+        debug_assert_eq!(offsets.len(), data.len());
+        unsafe {
+            msg_send![self,
+                setFragmentBuffers: data.as_ptr()
+                offsets: offsets.as_ptr()
+                withRange: NSRange {
+                    location: start_index,
+                    length: data.len() as _,
+                }
+            ]
+        }
+    }
+
+    pub fn set_fragment_texture(&self, index: NSUInteger, texture: Option<&TextureRef>) {
+        unsafe {
+            msg_send![self,
+                setFragmentTexture:texture
+                atIndex:index
+            ]
+        }
+    }
+
+    pub fn set_fragment_textures(&self, start_index: NSUInteger, data: &[Option<&TextureRef>]) {
+        unsafe {
+            msg_send![self,
+                setFragmentTextures: data.as_ptr()
+                withRange: NSRange {
+                    location: start_index,
+                    length: data.len() as _,
+                }
+            ]
+        }
+    }
+
+    pub fn set_fragment_sampler_state(&self, index: NSUInteger, sampler: Option<&SamplerStateRef>) {
+        unsafe {
+            msg_send![self, setFragmentSamplerState:sampler
+                                            atIndex:index]
+        }
+    }
+
+    pub fn set_fragment_sampler_states(
+        &self,
+        start_index: NSUInteger,
+        data: &[Option<&SamplerStateRef>],
+    ) {
+        unsafe {
+            msg_send![self,
+                setFragmentSamplerStates: data.as_ptr()
+                withRange: NSRange {
+                    location: start_index,
+                    length: data.len() as _,
+                }
+            ]
+        }
+    }
+
+    pub fn set_fragment_sampler_state_with_lod(
+        &self,
+        index: NSUInteger,
+        sampler: Option<&SamplerStateRef>,
+        lod_clamp: Range<f32>,
+    ) {
+        unsafe {
+            msg_send![self,
+                setFragmentSamplerState:sampler
+                lodMinClamp:lod_clamp.start
+                lodMaxClamp:lod_clamp.end
+                atIndex:index
+            ]
+        }
+    }
+
+    // Drawing Geometric Primitives
+
+    pub fn draw_primitives(
+        &self,
+        primitive_type: MTLPrimitiveType,
+        vertex_start: NSUInteger,
+        vertex_count: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                drawPrimitives: primitive_type
+                vertexStart: vertex_start
+                vertexCount: vertex_count
+            ]
+        }
+    }
+
+    pub fn draw_primitives_instanced(
+        &self,
+        primitive_type: MTLPrimitiveType,
+        vertex_start: NSUInteger,
+        vertex_count: NSUInteger,
+        instance_count: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                drawPrimitives: primitive_type
+                vertexStart: vertex_start
+                vertexCount: vertex_count
+                instanceCount: instance_count
+            ]
+        }
+    }
+
+    pub fn draw_primitives_instanced_base_instance(
+        &self,
+        primitive_type: MTLPrimitiveType,
+        vertex_start: NSUInteger,
+        vertex_count: NSUInteger,
+        instance_count: NSUInteger,
+        base_instance: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                drawPrimitives: primitive_type
+                vertexStart: vertex_start
+                vertexCount: vertex_count
+                instanceCount: instance_count
+                baseInstance: base_instance
+            ]
+        }
+    }
+
+    pub fn draw_primitives_indirect(
+        &self,
+        primitive_type: MTLPrimitiveType,
+        indirect_buffer: &BufferRef,
+        indirect_buffer_offset: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                drawPrimitives: primitive_type
+                indirectBuffer: indirect_buffer
+                indirectBufferOffset: indirect_buffer_offset
+            ]
+        }
+    }
+
+    pub fn draw_indexed_primitives(
+        &self,
+        primitive_type: MTLPrimitiveType,
+        index_count: NSUInteger,
+        index_type: MTLIndexType,
+        index_buffer: &BufferRef,
+        index_buffer_offset: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                drawIndexedPrimitives: primitive_type
+                indexCount: index_count
+                indexType: index_type
+                indexBuffer: index_buffer
+                indexBufferOffset: index_buffer_offset
+            ]
+        }
+    }
+
+    pub fn draw_indexed_primitives_instanced(
+        &self,
+        primitive_type: MTLPrimitiveType,
+        index_count: NSUInteger,
+        index_type: MTLIndexType,
+        index_buffer: &BufferRef,
+        index_buffer_offset: NSUInteger,
+        instance_count: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                drawIndexedPrimitives: primitive_type
+                indexCount: index_count
+                indexType: index_type
+                indexBuffer: index_buffer
+                indexBufferOffset: index_buffer_offset
+                instanceCount: instance_count
+            ]
+        }
+    }
+
+    pub fn draw_indexed_primitives_instanced_base_instance(
+        &self,
+        primitive_type: MTLPrimitiveType,
+        index_count: NSUInteger,
+        index_type: MTLIndexType,
+        index_buffer: &BufferRef,
+        index_buffer_offset: NSUInteger,
+        instance_count: NSUInteger,
+        base_vertex: NSInteger,
+        base_instance: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                drawIndexedPrimitives: primitive_type
+                indexCount: index_count
+                indexType: index_type
+                indexBuffer: index_buffer
+                indexBufferOffset: index_buffer_offset
+                instanceCount: instance_count
+                baseVertex: base_vertex
+                baseInstance: base_instance
+            ]
+        }
+    }
+
+    pub fn draw_indexed_primitives_indirect(
+        &self,
+        primitive_type: MTLPrimitiveType,
+        index_type: MTLIndexType,
+        index_buffer: &BufferRef,
+        index_buffer_offset: NSUInteger,
+        indirect_buffer: &BufferRef,
+        indirect_buffer_offset: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                drawIndexedPrimitives: primitive_type
+                indexType: index_type
+                indexBuffer: index_buffer
+                indexBufferOffset: index_buffer_offset
+                indirectBuffer: indirect_buffer
+                indirectBufferOffset: indirect_buffer_offset
+            ]
+        }
+    }
+
+    // TODO: more draws
+    // fn setVertexBufferOffset_atIndex(self, offset: NSUInteger, index: NSUInteger);
+    // fn setVertexBuffers_offsets_withRange(self, buffers: *const id, offsets: *const NSUInteger, range: NSRange);
+    // fn setVertexSamplerStates_lodMinClamps_lodMaxClamps_withRange(self, samplers: *const id, lodMinClamps: *const f32, lodMaxClamps: *const f32, range: NSRange);
+
+    /// Adds an untracked resource to the render pass.
+    ///
+    /// Availability: iOS 11.0+, macOS 10.13+
+    ///
+    /// # Arguments
+    /// * `resource`: A resource within an argument buffer.
+    /// * `usage`: Options for describing how a graphics function uses the resource.
+    ///
+    /// See <https://developer.apple.com/documentation/metal/mtlrendercommandencoder/2866168-useresource?language=objc>
+    #[deprecated(note = "Use use_resource_at instead")]
+    pub fn use_resource(&self, resource: &ResourceRef, usage: MTLResourceUsage) {
+        unsafe {
+            msg_send![self,
+                useResource:resource
+                usage:usage
+            ]
+        }
+    }
+
+    /// Adds an untracked resource to the render pass, specifying which render stages need it.
+    ///
+    /// Availability: iOS 13.0+, macOS 10.15+
+    ///
+    /// # Arguments
+    /// * `resource`: A resource within an argument buffer.
+    /// * `usage`: Options for describing how a graphics function uses the resource.
+    /// * `stages`: The render stages where the resource must be resident.
+    ///
+    /// See <https://developer.apple.com/documentation/metal/mtlrendercommandencoder/3043404-useresource>
+    pub fn use_resource_at(
+        &self,
+        resource: &ResourceRef,
+        usage: MTLResourceUsage,
+        stages: MTLRenderStages,
+    ) {
+        unsafe {
+            msg_send![self,
+                useResource: resource
+                usage: usage
+                stages: stages
+            ]
+        }
+    }
+
+    /// Adds an array of untracked resources to the render pass, specifying which stages need them.
+    ///
+    /// When working with color render targets, call this method as late as possible to improve performance.
+    ///
+    /// Availability: iOS 13.0+, macOS 10.15+
+    ///
+    /// # Arguments
+    /// * `resources`: A slice of resources within an argument buffer.
+    /// * `usage`: Options for describing how a graphics function uses the resources.
+    /// * `stages`: The render stages where the resources must be resident.
+    pub fn use_resources(
+        &self,
+        resources: &[&ResourceRef],
+        usage: MTLResourceUsage,
+        stages: MTLRenderStages,
+    ) {
+        unsafe {
+            msg_send![self,
+                useResources: resources.as_ptr()
+                count: resources.len() as NSUInteger
+                usage: usage
+                stages: stages
+            ]
+        }
+    }
+
+    /// Adds the resources in a heap to the render pass.
+    ///
+    /// Availability: iOS 11.0+, macOS 10.13+
+    ///
+    /// # Arguments:
+    /// * `heap`: A heap that contains resources within an argument buffer.
+    ///
+    /// See <https://developer.apple.com/documentation/metal/mtlrendercommandencoder/2866163-useheap?language=objc>
+    #[deprecated(note = "Use use_heap_at instead")]
+    pub fn use_heap(&self, heap: &HeapRef) {
+        unsafe { msg_send![self, useHeap: heap] }
+    }
+
+    /// Adds the resources in a heap to the render pass, specifying which render stages need them.
+    ///
+    /// Availability: iOS 13.0+, macOS 10.15+
+    ///
+    /// # Arguments
+    /// * `heap`: A heap that contains resources within an argument buffer.
+    /// * `stages`: The render stages where the resources must be resident.
+    ///
+    pub fn use_heap_at(&self, heap: &HeapRef, stages: MTLRenderStages) {
+        unsafe {
+            msg_send![self,
+                useHeap: heap
+                stages: stages
+            ]
+        }
+    }
+
+    /// Adds the resources in an array of heaps to the render pass, specifying which render stages need them.
+    ///
+    /// Availability: iOS 13.0+, macOS 10.15+
+    ///
+    /// # Arguments
+    ///
+    /// * `heaps`: A slice of heaps that contains resources within an argument buffer.
+    /// * `stages`: The render stages where the resources must be resident.
+    pub fn use_heaps(&self, heaps: &[&HeapRef], stages: MTLRenderStages) {
+        unsafe {
+            msg_send![self,
+                useHeaps: heaps.as_ptr()
+                count: heaps.len() as NSUInteger
+                stages: stages
+            ]
+        }
+    }
+
+    pub fn execute_commands_in_buffer(
+        &self,
+        buffer: &IndirectCommandBufferRef,
+        with_range: NSRange,
+    ) {
+        unsafe { msg_send![self, executeCommandsInBuffer:buffer withRange:with_range] }
+    }
+
+    pub fn update_fence(&self, fence: &FenceRef, after_stages: MTLRenderStages) {
+        unsafe {
+            msg_send![self,
+                updateFence: fence
+                afterStages: after_stages
+            ]
+        }
+    }
+
+    pub fn wait_for_fence(&self, fence: &FenceRef, before_stages: MTLRenderStages) {
+        unsafe {
+            msg_send![self,
+                waitForFence: fence
+                beforeStages: before_stages
+            ]
+        }
+    }
+}
+
+pub enum MTLBlitCommandEncoder {}
+
+foreign_obj_type! {
+    type CType = MTLBlitCommandEncoder;
+    pub struct BlitCommandEncoder;
+    pub struct BlitCommandEncoderRef;
+    type ParentType = CommandEncoderRef;
+}
+
+impl BlitCommandEncoderRef {
+    pub fn synchronize_resource(&self, resource: &ResourceRef) {
+        unsafe { msg_send![self, synchronizeResource: resource] }
+    }
+
+    pub fn fill_buffer(&self, destination_buffer: &BufferRef, range: crate::NSRange, value: u8) {
+        unsafe {
+            msg_send![self,
+                fillBuffer: destination_buffer
+                range: range
+                value: value
+            ]
+        }
+    }
+
+    pub fn generate_mipmaps(&self, texture: &TextureRef) {
+        unsafe { msg_send![self, generateMipmapsForTexture: texture] }
+    }
+
+    pub fn copy_from_buffer(
+        &self,
+        source_buffer: &BufferRef,
+        source_offset: NSUInteger,
+        destination_buffer: &BufferRef,
+        destination_offset: NSUInteger,
+        size: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                copyFromBuffer: source_buffer
+                sourceOffset: source_offset
+                toBuffer: destination_buffer
+                destinationOffset: destination_offset
+                size: size
+            ]
+        }
+    }
+
+    pub fn copy_from_texture(
+        &self,
+        source_texture: &TextureRef,
+        source_slice: NSUInteger,
+        source_level: NSUInteger,
+        source_origin: MTLOrigin,
+        source_size: MTLSize,
+        destination_texture: &TextureRef,
+        destination_slice: NSUInteger,
+        destination_level: NSUInteger,
+        destination_origin: MTLOrigin,
+    ) {
+        unsafe {
+            msg_send![self,
+                copyFromTexture: source_texture
+                sourceSlice: source_slice
+                sourceLevel: source_level
+                sourceOrigin: source_origin
+                sourceSize: source_size
+                toTexture: destination_texture
+                destinationSlice: destination_slice
+                destinationLevel: destination_level
+                destinationOrigin: destination_origin
+            ]
+        }
+    }
+
+    pub fn copy_from_buffer_to_texture(
+        &self,
+        source_buffer: &BufferRef,
+        source_offset: NSUInteger,
+        source_bytes_per_row: NSUInteger,
+        source_bytes_per_image: NSUInteger,
+        source_size: MTLSize,
+        destination_texture: &TextureRef,
+        destination_slice: NSUInteger,
+        destination_level: NSUInteger,
+        destination_origin: MTLOrigin,
+        options: MTLBlitOption,
+    ) {
+        unsafe {
+            msg_send![self,
+                copyFromBuffer: source_buffer
+                sourceOffset: source_offset
+                sourceBytesPerRow: source_bytes_per_row
+                sourceBytesPerImage: source_bytes_per_image
+                sourceSize: source_size
+                toTexture: destination_texture
+                destinationSlice: destination_slice
+                destinationLevel: destination_level
+                destinationOrigin: destination_origin
+                options: options
+            ]
+        }
+    }
+
+    /// https://developer.apple.com/documentation/metal/mtlblitcommandencoder/1400756-copy
+    pub fn copy_from_texture_to_buffer(
+        &self,
+        source_texture: &TextureRef,
+        source_slice: NSUInteger,
+        source_level: NSUInteger,
+        source_origin: MTLOrigin,
+        source_size: MTLSize,
+        destination_buffer: &BufferRef,
+        destination_offset: NSUInteger,
+        destination_bytes_per_row: NSUInteger,
+        destination_bytes_per_image: NSUInteger,
+        options: MTLBlitOption,
+    ) {
+        unsafe {
+            msg_send![self,
+                copyFromTexture: source_texture
+                sourceSlice: source_slice
+                sourceLevel: source_level
+                sourceOrigin: source_origin
+                sourceSize: source_size
+                toBuffer: destination_buffer
+                destinationOffset: destination_offset
+                destinationBytesPerRow: destination_bytes_per_row
+                destinationBytesPerImage: destination_bytes_per_image
+                options: options
+            ]
+        }
+    }
+
+    pub fn optimize_contents_for_gpu_access(&self, texture: &TextureRef) {
+        unsafe { msg_send![self, optimizeContentsForGPUAccess: texture] }
+    }
+
+    pub fn optimize_contents_for_gpu_access_slice_level(
+        &self,
+        texture: &TextureRef,
+        slice: NSUInteger,
+        level: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                optimizeContentsForGPUAccess: texture
+                slice: slice
+                level: level
+            ]
+        }
+    }
+
+    pub fn optimize_contents_for_cpu_access(&self, texture: &TextureRef) {
+        unsafe { msg_send![self, optimizeContentsForCPUAccess: texture] }
+    }
+
+    pub fn optimize_contents_for_cpu_access_slice_level(
+        &self,
+        texture: &TextureRef,
+        slice: NSUInteger,
+        level: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                optimizeContentsForCPUAccess: texture
+                slice: slice
+                level: level
+            ]
+        }
+    }
+
+    pub fn update_fence(&self, fence: &FenceRef) {
+        unsafe { msg_send![self, updateFence: fence] }
+    }
+
+    pub fn wait_for_fence(&self, fence: &FenceRef) {
+        unsafe { msg_send![self, waitForFence: fence] }
+    }
+}
+
+pub enum MTLComputeCommandEncoder {}
+
+foreign_obj_type! {
+    type CType = MTLComputeCommandEncoder;
+    pub struct ComputeCommandEncoder;
+    pub struct ComputeCommandEncoderRef;
+    type ParentType = CommandEncoderRef;
+}
+
+impl ComputeCommandEncoderRef {
+    pub fn set_compute_pipeline_state(&self, state: &ComputePipelineStateRef) {
+        unsafe { msg_send![self, setComputePipelineState: state] }
+    }
+
+    pub fn set_buffer(&self, index: NSUInteger, buffer: Option<&BufferRef>, offset: NSUInteger) {
+        unsafe { msg_send![self, setBuffer:buffer offset:offset atIndex:index] }
+    }
+
+    pub fn set_buffers(
+        &self,
+        start_index: NSUInteger,
+        data: &[Option<&BufferRef>],
+        offsets: &[NSUInteger],
+    ) {
+        debug_assert_eq!(offsets.len(), data.len());
+        unsafe {
+            msg_send![self,
+                setBuffers: data.as_ptr()
+                offsets: offsets.as_ptr()
+                withRange: NSRange {
+                    location: start_index,
+                    length: data.len() as _,
+                }
+            ]
+        }
+    }
+
+    pub fn set_texture(&self, index: NSUInteger, texture: Option<&TextureRef>) {
+        unsafe {
+            msg_send![self,
+                setTexture:texture
+                atIndex:index
+            ]
+        }
+    }
+
+    pub fn set_textures(&self, start_index: NSUInteger, data: &[Option<&TextureRef>]) {
+        unsafe {
+            msg_send![self,
+                setTextures: data.as_ptr()
+                withRange: NSRange {
+                    location: start_index,
+                    length: data.len() as _,
+                }
+            ]
+        }
+    }
+
+    pub fn set_sampler_state(&self, index: NSUInteger, sampler: Option<&SamplerStateRef>) {
+        unsafe {
+            msg_send![self,
+                setSamplerState:sampler
+                atIndex:index
+            ]
+        }
+    }
+
+    pub fn set_sampler_states(&self, start_index: NSUInteger, data: &[Option<&SamplerStateRef>]) {
+        unsafe {
+            msg_send![self,
+                setSamplerStates: data.as_ptr()
+                withRange: NSRange {
+                    location: start_index,
+                    length: data.len() as _,
+                }
+            ]
+        }
+    }
+
+    pub fn set_sampler_state_with_lod(
+        &self,
+        index: NSUInteger,
+        sampler: Option<&SamplerStateRef>,
+        lod_clamp: Range<f32>,
+    ) {
+        unsafe {
+            msg_send![self,
+                setSamplerState:sampler
+                lodMinClamp:lod_clamp.start
+                lodMaxClamp:lod_clamp.end
+                atIndex:index
+            ]
+        }
+    }
+
+    pub fn set_bytes(&self, index: NSUInteger, length: NSUInteger, bytes: *const std::ffi::c_void) {
+        unsafe {
+            msg_send![self,
+                setBytes: bytes
+                length: length
+                atIndex: index
+            ]
+        }
+    }
+
+    pub fn dispatch_thread_groups(
+        &self,
+        thread_groups_count: MTLSize,
+        threads_per_threadgroup: MTLSize,
+    ) {
+        unsafe {
+            msg_send![self,
+                dispatchThreadgroups:thread_groups_count
+                threadsPerThreadgroup:threads_per_threadgroup
+            ]
+        }
+    }
+
+    pub fn dispatch_threads(&self, threads_per_grid: MTLSize, threads_per_thread_group: MTLSize) {
+        unsafe {
+            msg_send![self,
+                dispatchThreads:threads_per_grid
+                threadsPerThreadgroup:threads_per_thread_group
+            ]
+        }
+    }
+
+    pub fn dispatch_thread_groups_indirect(
+        &self,
+        buffer: &BufferRef,
+        offset: NSUInteger,
+        threads_per_threadgroup: MTLSize,
+    ) {
+        unsafe {
+            msg_send![self,
+                dispatchThreadgroupsWithIndirectBuffer:buffer
+                indirectBufferOffset:offset
+                threadsPerThreadgroup:threads_per_threadgroup
+            ]
+        }
+    }
+
+    pub fn set_threadgroup_memory_length(&self, at_index: NSUInteger, size: NSUInteger) {
+        unsafe {
+            msg_send![self,
+                setThreadgroupMemoryLength:size
+                atIndex: at_index
+            ]
+        }
+    }
+
+    /// Specifies that a resource in an argument buffer can be safely used by a compute pass.
+    ///
+    /// Availability: iOS 11.0+, macOS 10.13+
+    ///
+    /// # Arguments
+    /// * `resource`: A specific resource within an argument buffer.
+    /// * `usage`: The options that describe how the resource will be used by a compute function.
+    pub fn use_resource(&self, resource: &ResourceRef, usage: MTLResourceUsage) {
+        unsafe {
+            msg_send![self,
+                useResource: resource
+                usage: usage
+            ]
+        }
+    }
+
+    /// Specifies that an array of resources in an argument buffer can be safely used by a compute pass.
+    ///
+    /// Availability: iOS 11.0+, macOS 10.13+
+    ///
+    /// See <https://developer.apple.com/documentation/metal/mtlcomputecommandencoder/2866561-useresources>
+    ///
+    /// # Arguments
+    /// * `resources`: A slice of resources within an argument buffer.
+    /// * `usage`: The options that describe how the array of resources will be used by a compute function.
+    pub fn use_resources(&self, resources: &[&ResourceRef], usage: MTLResourceUsage) {
+        unsafe {
+            msg_send![self,
+                useResources: resources.as_ptr()
+                count: resources.len() as NSUInteger
+                usage: usage
+            ]
+        }
+    }
+
+    /// Specifies that a heap containing resources in an argument buffer can be safely used by a compute pass.
+    ///
+    /// Availability: iOS 11.0+, macOS 10.13+
+    ///
+    /// See <https://developer.apple.com/documentation/metal/mtlcomputecommandencoder/2866530-useheap>
+    ///
+    /// # Arguments
+    /// * `heap`: A heap that contains resources within an argument buffer.
+    pub fn use_heap(&self, heap: &HeapRef) {
+        unsafe { msg_send![self, useHeap: heap] }
+    }
+
+    /// Specifies that an array of heaps containing resources in an argument buffer can be safely
+    /// used by a compute pass.
+    ///
+    /// Availability: iOS 11.0+, macOS 10.13+
+    ///
+    /// # Arguments
+    /// * `heaps`: A slice of heaps that contains resources within an argument buffer.
+    pub fn use_heaps(&self, heaps: &[&HeapRef]) {
+        unsafe {
+            msg_send![self,
+                useHeaps: heaps.as_ptr()
+                count: heaps.len() as NSUInteger
+            ]
+        }
+    }
+
+    pub fn update_fence(&self, fence: &FenceRef) {
+        unsafe { msg_send![self, updateFence: fence] }
+    }
+
+    pub fn wait_for_fence(&self, fence: &FenceRef) {
+        unsafe { msg_send![self, waitForFence: fence] }
+    }
+}
+
+pub enum MTLArgumentEncoder {}
+
+foreign_obj_type! {
+    type CType = MTLArgumentEncoder;
+    pub struct ArgumentEncoder;
+    pub struct ArgumentEncoderRef;
+}
+
+impl ArgumentEncoderRef {
+    pub fn encoded_length(&self) -> NSUInteger {
+        unsafe { msg_send![self, encodedLength] }
+    }
+
+    pub fn alignment(&self) -> NSUInteger {
+        unsafe { msg_send![self, alignment] }
+    }
+
+    pub fn set_argument_buffer(&self, buffer: &BufferRef, offset: NSUInteger) {
+        unsafe {
+            msg_send![self,
+                setArgumentBuffer: buffer
+                offset: offset
+            ]
+        }
+    }
+
+    pub fn set_argument_buffer_to_element(
+        &self,
+        array_element: NSUInteger,
+        buffer: &BufferRef,
+        offset: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                setArgumentBuffer: buffer
+                startOffset: offset
+                arrayElement: array_element
+            ]
+        }
+    }
+
+    pub fn set_buffer(&self, at_index: NSUInteger, buffer: &BufferRef, offset: NSUInteger) {
+        unsafe {
+            msg_send![self,
+                setBuffer: buffer
+                offset: offset
+                atIndex: at_index
+            ]
+        }
+    }
+
+    pub fn set_buffers(
+        &self,
+        start_index: NSUInteger,
+        data: &[&BufferRef],
+        offsets: &[NSUInteger],
+    ) {
+        assert_eq!(offsets.len(), data.len());
+        unsafe {
+            msg_send![self,
+                setBuffers: data.as_ptr()
+                offsets: offsets.as_ptr()
+                withRange: NSRange {
+                    location: start_index,
+                    length: data.len() as _,
+                }
+            ]
+        }
+    }
+
+    pub fn set_texture(&self, at_index: NSUInteger, texture: &TextureRef) {
+        unsafe {
+            msg_send![self,
+                setTexture: texture
+                atIndex: at_index
+            ]
+        }
+    }
+
+    pub fn set_textures(&self, start_index: NSUInteger, data: &[&TextureRef]) {
+        unsafe {
+            msg_send![self,
+                setTextures: data.as_ptr()
+                withRange: NSRange {
+                    location: start_index,
+                    length: data.len() as _,
+                }
+            ]
+        }
+    }
+
+    pub fn set_sampler_state(&self, at_index: NSUInteger, sampler_state: &SamplerStateRef) {
+        unsafe {
+            msg_send![self,
+                setSamplerState: sampler_state
+                atIndex: at_index
+            ]
+        }
+    }
+
+    pub fn set_sampler_states(&self, start_index: NSUInteger, data: &[&SamplerStateRef]) {
+        unsafe {
+            msg_send![self,
+                setSamplerStates: data.as_ptr()
+                withRange: NSRange {
+                    location: start_index,
+                    length: data.len() as _,
+                }
+            ]
+        }
+    }
+
+    pub fn set_render_pipeline_state(
+        &self,
+        at_index: NSUInteger,
+        pipeline: &RenderPipelineStateRef,
+    ) {
+        unsafe {
+            msg_send![self,
+                setRenderPipelineState: pipeline
+                atIndex: at_index
+            ]
+        }
+    }
+
+    pub fn set_render_pipeline_states(
+        &self,
+        start_index: NSUInteger,
+        pipelines: &[&RenderPipelineStateRef],
+    ) {
+        unsafe {
+            msg_send![self,
+                setRenderPipelineStates: pipelines.as_ptr()
+                withRange: NSRange {
+                    location: start_index,
+                    length: pipelines.len() as _,
+                }
+            ]
+        }
+    }
+
+    pub fn constant_data(&self, at_index: NSUInteger) -> *mut std::ffi::c_void {
+        unsafe { msg_send![self, constantDataAtIndex: at_index] }
+    }
+
+    pub fn new_argument_encoder_for_buffer(&self, index: NSUInteger) -> ArgumentEncoder {
+        unsafe {
+            let ptr = msg_send![self, newArgumentEncoderForBufferAtIndex: index];
+            ArgumentEncoder::from_ptr(ptr)
+        }
+    }
+}
diff --git a/third_party/rust/metal/src/heap.rs b/third_party/rust/metal/src/heap.rs
new file mode 100644
index 0000000000..9d60142a7b
--- /dev/null
+++ b/third_party/rust/metal/src/heap.rs
@@ -0,0 +1,207 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+
+/// Only available on macos(10.15), ios(13.0)
+#[repr(u64)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+pub enum MTLHeapType {
+    Automatic = 0,
+    Placement = 1,
+    /// Only available on macos(11.0), macCatalyst(14.0)
+    Sparse = 2,
+}
+
+pub enum MTLHeap {}
+
+foreign_obj_type! {
+    type CType = MTLHeap;
+    pub struct Heap;
+    pub struct HeapRef;
+}
+
+impl HeapRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: nslabel];
+        }
+    }
+
+    pub fn cpu_cache_mode(&self) -> MTLCPUCacheMode {
+        unsafe { msg_send![self, cpuCacheMode] }
+    }
+
+    pub fn storage_mode(&self) -> MTLStorageMode {
+        unsafe { msg_send![self, storageMode] }
+    }
+
+    /// Only available on macos(10.15), ios(13.0)
+    pub fn hazard_tracking_mode(&self) -> MTLHazardTrackingMode {
+        unsafe { msg_send![self, hazardTrackingMode] }
+    }
+
+    /// Only available on macos(10.15), ios(13.0)
+    pub fn resource_options(&self) -> MTLResourceOptions {
+        unsafe { msg_send![self, resourceOptions] }
+    }
+
+    pub fn set_purgeable_state(&self, state: MTLPurgeableState) -> MTLPurgeableState {
+        unsafe { msg_send![self, setPurgeableState: state] }
+    }
+
+    pub fn size(&self) -> NSUInteger {
+        unsafe { msg_send![self, size] }
+    }
+
+    pub fn used_size(&self) -> NSUInteger {
+        unsafe { msg_send![self, usedSize] }
+    }
+
+    /// Only available on macos(10.15), ios(13.0)
+    pub fn heap_type(&self) -> MTLHeapType {
+        unsafe { msg_send![self, type] }
+    }
+
+    /// Only available on macos(10.13), ios(11.0)
+    pub fn current_allocated_size(&self) -> NSUInteger {
+        unsafe { msg_send![self, currentAllocatedSize] }
+    }
+
+    pub fn max_available_size_with_alignment(&self, alignment: NSUInteger) -> NSUInteger {
+        unsafe { msg_send![self, maxAvailableSizeWithAlignment: alignment] }
+    }
+
+    pub fn new_buffer(&self, length: u64, options: MTLResourceOptions) -> Option<Buffer> {
+        unsafe {
+            let ptr: *mut MTLBuffer = msg_send![self, newBufferWithLength:length
+                                                                  options:options];
+            if !ptr.is_null() {
+                Some(Buffer::from_ptr(ptr))
+            } else {
+                None
+            }
+        }
+    }
+
+    pub fn new_texture(&self, descriptor: &TextureDescriptorRef) -> Option<Texture> {
+        unsafe {
+            let ptr: *mut MTLTexture = msg_send![self, newTextureWithDescriptor: descriptor];
+            if !ptr.is_null() {
+                Some(Texture::from_ptr(ptr))
+            } else {
+                None
+            }
+        }
+    }
+
+    /// Only available on macOS 10.15+ & iOS 13.0+
+    pub fn new_buffer_with_offset(
+        &self,
+        length: u64,
+        options: MTLResourceOptions,
+        offset: u64,
+    ) -> Option<Buffer> {
+        unsafe {
+            let ptr: *mut MTLBuffer = msg_send![self, newBufferWithLength:length
+                                                                  options:options
+                                                                  offset:offset];
+            if !ptr.is_null() {
+                Some(Buffer::from_ptr(ptr))
+            } else {
+                None
+            }
+        }
+    }
+
+    /// Only available on macOS 10.15+ & iOS 13.0+
+    pub fn new_texture_with_offset(
+        &self,
+        descriptor: &TextureDescriptorRef,
+        offset: u64,
+    ) -> Option<Texture> {
+        unsafe {
+            let ptr: *mut MTLTexture = msg_send![self, newTextureWithDescriptor:descriptor
+                                                                         offset:offset];
+            if !ptr.is_null() {
+                Some(Texture::from_ptr(ptr))
+            } else {
+                None
+            }
+        }
+    }
+}
+
+pub enum MTLHeapDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLHeapDescriptor;
+    pub struct HeapDescriptor;
+    pub struct HeapDescriptorRef;
+}
+
+impl HeapDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLHeapDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl HeapDescriptorRef {
+    pub fn cpu_cache_mode(&self) -> MTLCPUCacheMode {
+        unsafe { msg_send![self, cpuCacheMode] }
+    }
+
+    pub fn set_cpu_cache_mode(&self, mode: MTLCPUCacheMode) {
+        unsafe { msg_send![self, setCpuCacheMode: mode] }
+    }
+
+    pub fn storage_mode(&self) -> MTLStorageMode {
+        unsafe { msg_send![self, storageMode] }
+    }
+
+    pub fn set_storage_mode(&self, mode: MTLStorageMode) {
+        unsafe { msg_send![self, setStorageMode: mode] }
+    }
+
+    pub fn size(&self) -> NSUInteger {
+        unsafe { msg_send![self, size] }
+    }
+
+    pub fn set_size(&self, size: NSUInteger) {
+        unsafe { msg_send![self, setSize: size] }
+    }
+
+    /// Only available on macos(10.15), ios(13.0)
+    pub fn hazard_tracking_mode(&self) -> MTLHazardTrackingMode {
+        unsafe { msg_send![self, hazardTrackingMode] }
+    }
+
+    /// Only available on macos(10.15), ios(13.0)
+    pub fn resource_options(&self) -> MTLResourceOptions {
+        unsafe { msg_send![self, resourceOptions] }
+    }
+
+    /// Only available on macos(10.15), ios(13.0)
+    pub fn heap_type(&self) -> MTLHeapType {
+        unsafe { msg_send![self, type] }
+    }
+}
diff --git a/third_party/rust/metal/src/indirect_encoder.rs b/third_party/rust/metal/src/indirect_encoder.rs
new file mode 100644
index 0000000000..88ac41d377
--- /dev/null
+++ b/third_party/rust/metal/src/indirect_encoder.rs
@@ -0,0 +1,347 @@
+use super::*;
+
+bitflags! {
+    #[allow(non_upper_case_globals)]
+    pub struct MTLIndirectCommandType: NSUInteger {
+        const Draw                      = 1 << 0;
+        const DrawIndexed               = 1 << 1;
+        const DrawPatches               = 1 << 2;
+        const DrawIndexedPatches        = 1 << 3;
+        const ConcurrentDispatch        = 1 << 4;
+        const ConcurrentDispatchThreads = 1 << 5;
+    }
+}
+
+pub enum MTLIndirectCommandBufferDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLIndirectCommandBufferDescriptor;
+    pub struct IndirectCommandBufferDescriptor;
+    pub struct IndirectCommandBufferDescriptorRef;
+}
+
+impl IndirectCommandBufferDescriptorRef {
+    pub fn command_types(&self) -> MTLIndirectCommandType {
+        unsafe { msg_send![self, commandTypes] }
+    }
+
+    pub fn set_command_types(&self, types: MTLIndirectCommandType) {
+        unsafe { msg_send![self, setCommandTypes: types] }
+    }
+
+    pub fn inherit_buffers(&self) -> bool {
+        unsafe {
+            match msg_send![self, inheritBuffers] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn set_inherit_buffers(&self, inherit: bool) {
+        unsafe { msg_send![self, setInheritBuffers: inherit] }
+    }
+
+    pub fn inherit_pipeline_state(&self) -> bool {
+        unsafe {
+            match msg_send![self, inheritPipelineState] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn set_inherit_pipeline_state(&self, inherit: bool) {
+        unsafe { msg_send![self, setInheritPipelineState: inherit] }
+    }
+
+    pub fn max_vertex_buffer_bind_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, maxVertexBufferBindCount] }
+    }
+
+    pub fn set_max_vertex_buffer_bind_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setMaxVertexBufferBindCount: count] }
+    }
+
+    pub fn max_fragment_buffer_bind_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, maxFragmentBufferBindCount] }
+    }
+
+    pub fn set_max_fragment_buffer_bind_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setMaxFragmentBufferBindCount: count] }
+    }
+
+    pub fn max_kernel_buffer_bind_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, maxKernelBufferBindCount] }
+    }
+
+    pub fn set_max_kernel_buffer_bind_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setMaxKernelBufferBindCount: count] }
+    }
+}
+
+pub enum MTLIndirectCommandBuffer {}
+
+foreign_obj_type! {
+    type CType = MTLIndirectCommandBuffer;
+    pub struct IndirectCommandBuffer;
+    pub struct IndirectCommandBufferRef;
+    type ParentType = ResourceRef;
+}
+
+impl IndirectCommandBufferRef {
+    pub fn size(&self) -> NSUInteger {
+        unsafe { msg_send![self, size] }
+    }
+
+    pub fn indirect_render_command_at_index(&self, index: NSUInteger) -> &IndirectRenderCommandRef {
+        unsafe { msg_send![self, indirectRenderCommandAtIndex: index] }
+    }
+
+    pub fn indirect_compute_command_at_index(
+        &self,
+        index: NSUInteger,
+    ) -> &IndirectComputeCommandRef {
+        unsafe { msg_send![self, indirectComputeCommandAtIndex: index] }
+    }
+
+    pub fn reset_with_range(&self, range: crate::NSRange) {
+        unsafe { msg_send![self, resetWithRange: range] }
+    }
+}
+
+pub enum MTLIndirectRenderCommand {}
+
+foreign_obj_type! {
+    type CType = MTLIndirectRenderCommand;
+    pub struct IndirectRenderCommand;
+    pub struct IndirectRenderCommandRef;
+}
+
+impl IndirectRenderCommandRef {
+    pub fn set_render_pipeline_state(&self, pipeline_state: &RenderPipelineStateRef) {
+        unsafe { msg_send![self, setRenderPipelineState: pipeline_state] }
+    }
+
+    pub fn set_vertex_buffer(
+        &self,
+        index: NSUInteger,
+        buffer: Option<&BufferRef>,
+        offset: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                setVertexBuffer: buffer
+                offset: offset
+                atIndex: index
+            ]
+        }
+    }
+
+    pub fn set_fragment_buffer(
+        &self,
+        index: NSUInteger,
+        buffer: Option<&BufferRef>,
+        offset: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                setFragmentBuffer:buffer
+                offset:offset
+                atIndex:index
+            ]
+        }
+    }
+
+    pub fn draw_primitives(
+        &self,
+        primitive_type: MTLPrimitiveType,
+        vertex_start: NSUInteger,
+        vertex_count: NSUInteger,
+        instance_count: NSUInteger,
+        base_instance: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                drawPrimitives: primitive_type
+                vertexStart: vertex_start
+                vertexCount: vertex_count
+                instanceCount: instance_count
+                baseInstance: base_instance
+            ]
+        }
+    }
+
+    pub fn draw_indexed_primitives(
+        &self,
+        primitive_type: MTLPrimitiveType,
+        index_count: NSUInteger,
+        index_type: MTLIndexType,
+        index_buffer: &BufferRef,
+        index_buffer_offset: NSUInteger,
+        instance_count: NSUInteger,
+        base_vertex: NSUInteger,
+        base_instance: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                drawIndexedPrimitives: primitive_type
+                indexCount: index_count
+                indexType: index_type
+                indexBuffer: index_buffer
+                indexBufferOffset: index_buffer_offset
+                instanceCount: instance_count
+                baseVertex: base_vertex
+                baseInstance: base_instance
+            ]
+        }
+    }
+
+    pub fn draw_patches(
+        &self,
+        number_of_patch_control_points: NSUInteger,
+        patch_start: NSUInteger,
+        patch_count: NSUInteger,
+        patch_index_buffer: &BufferRef,
+        patch_index_buffer_offset: NSUInteger,
+        instance_count: NSUInteger,
+        base_instance: NSUInteger,
+        tesselation_factor_buffer: &BufferRef,
+        tesselation_factor_buffer_offset: NSUInteger,
+        tesselation_factor_buffer_instance_stride: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                drawPatches: number_of_patch_control_points
+                patchStart: patch_start
+                patchCount: patch_count
+                patchIndexBuffer: patch_index_buffer
+                patchIndexBufferOffset: patch_index_buffer_offset
+                instanceCount: instance_count
+                baseInstance: base_instance
+                tessellationFactorBuffer: tesselation_factor_buffer
+                tessellationFactorBufferOffset: tesselation_factor_buffer_offset
+                tessellationFactorBufferInstanceStride: tesselation_factor_buffer_instance_stride
+            ]
+        }
+    }
+
+    pub fn draw_indexed_patches(
+        &self,
+        number_of_patch_control_points: NSUInteger,
+        patch_start: NSUInteger,
+        patch_count: NSUInteger,
+        patch_index_buffer: &BufferRef,
+        patch_index_buffer_offset: NSUInteger,
+        control_point_index_buffer: &BufferRef,
+        control_point_index_buffer_offset: NSUInteger,
+        instance_count: NSUInteger,
+        base_instance: NSUInteger,
+        tesselation_factor_buffer: &BufferRef,
+        tesselation_factor_buffer_offset: NSUInteger,
+        tesselation_factor_buffer_instance_stride: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                drawIndexedPatches: number_of_patch_control_points
+                patchStart: patch_start
+                patchCount: patch_count
+                patchIndexBuffer: patch_index_buffer
+                patchIndexBufferOffset: patch_index_buffer_offset
+                controlPointIndexBuffer: control_point_index_buffer
+                controlPointIndexBufferOffset: control_point_index_buffer_offset
+                instanceCount: instance_count
+                baseInstance: base_instance
+                tessellationFactorBuffer: tesselation_factor_buffer
+                tessellationFactorBufferOffset: tesselation_factor_buffer_offset
+                tessellationFactorBufferInstanceStride: tesselation_factor_buffer_instance_stride
+            ]
+        }
+    }
+
+    pub fn reset(&self) {
+        unsafe { msg_send![self, reset] }
+    }
+}
+
+pub enum MTLIndirectComputeCommand {}
+
+foreign_obj_type! {
+    type CType = MTLIndirectComputeCommand;
+    pub struct IndirectComputeCommand;
+    pub struct IndirectComputeCommandRef;
+}
+
+impl IndirectComputeCommandRef {
+    pub fn set_compute_pipeline_state(&self, state: &ComputePipelineStateRef) {
+        unsafe { msg_send![self, setComputePipelineState: state] }
+    }
+
+    pub fn set_kernel_buffer(
+        &self,
+        index: NSUInteger,
+        buffer: Option<&BufferRef>,
+        offset: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self,
+                setKernelBuffer: buffer
+                offset: offset
+                atIndex: index
+            ]
+        }
+    }
+
+    pub fn set_threadgroup_memory_length(&self, index: NSUInteger, length: NSUInteger) {
+        unsafe {
+            msg_send![self,
+                setThreadgroupMemoryLength: length
+                atIndex: index
+            ]
+        }
+    }
+
+    pub fn set_stage_in_region(&self, region: MTLRegion) {
+        unsafe { msg_send![self, setStageInRegion: region] }
+    }
+
+    pub fn set_barrier(&self) {
+        unsafe { msg_send![self, setBarrier] }
+    }
+
+    pub fn clear_barrier(&self) {
+        unsafe { msg_send![self, clearBarrier] }
+    }
+
+    pub fn concurrent_dispatch_threadgroups(
+        &self,
+        thread_groups_per_grid: MTLSize,
+        threads_per_threadgroup: MTLSize,
+    ) {
+        unsafe {
+            msg_send![self,
+                concurrentDispatchThreadgroups: thread_groups_per_grid
+                threadsPerThreadgroup: threads_per_threadgroup
+            ]
+        }
+    }
+
+    pub fn concurrent_dispatch_threads(
+        &self,
+        thread_groups_per_grid: MTLSize,
+        threads_per_threadgroup: MTLSize,
+    ) {
+        unsafe {
+            msg_send![self,
+                concurrentDispatchThreads: thread_groups_per_grid
+                threadsPerThreadgroup: threads_per_threadgroup
+            ]
+        }
+    }
+
+    pub fn reset(&self) {
+        unsafe { msg_send![self, reset] }
+    }
+}
diff --git a/third_party/rust/metal/src/lib.rs b/third_party/rust/metal/src/lib.rs
new file mode 100644
index 0000000000..bc8427922c
--- /dev/null
+++ b/third_party/rust/metal/src/lib.rs
@@ -0,0 +1,549 @@
+// Copyright 2017 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+#![allow(non_snake_case)]
+#![allow(non_upper_case_globals)]
+
+#[macro_use]
+extern crate bitflags;
+#[macro_use]
+extern crate log;
+#[macro_use]
+extern crate objc;
+#[macro_use]
+extern crate foreign_types;
+
+use std::{
+    borrow::{Borrow, ToOwned},
+    marker::PhantomData,
+    mem,
+    ops::Deref,
+    os::raw::c_void,
+};
+
+use core_graphics_types::{base::CGFloat, geometry::CGSize};
+use foreign_types::ForeignType;
+use objc::runtime::{Object, NO, YES};
+
+#[cfg(target_pointer_width = "64")]
+pub type NSInteger = i64;
+#[cfg(not(target_pointer_width = "64"))]
+pub type NSInteger = i32;
+#[cfg(target_pointer_width = "64")]
+pub type NSUInteger = u64;
+#[cfg(target_pointer_width = "32")]
+pub type NSUInteger = u32;
+
+#[repr(C)]
+#[derive(Copy, Clone)]
+pub struct NSRange {
+    pub location: NSUInteger,
+    pub length: NSUInteger,
+}
+
+impl NSRange {
+    #[inline]
+    pub fn new(location: NSUInteger, length: NSUInteger) -> NSRange {
+        NSRange { location, length }
+    }
+}
+
+fn nsstring_as_str(nsstr: &objc::runtime::Object) -> &str {
+    let bytes = unsafe {
+        let bytes: *const std::os::raw::c_char = msg_send![nsstr, UTF8String];
+        bytes as *const u8
+    };
+    let len: NSUInteger = unsafe { msg_send![nsstr, length] };
+    unsafe {
+        let bytes = std::slice::from_raw_parts(bytes, len as usize);
+        std::str::from_utf8(bytes).unwrap()
+    }
+}
+
+fn nsstring_from_str(string: &str) -> *mut objc::runtime::Object {
+    const UTF8_ENCODING: usize = 4;
+
+    let cls = class!(NSString);
+    let bytes = string.as_ptr() as *const c_void;
+    unsafe {
+        let obj: *mut objc::runtime::Object = msg_send![cls, alloc];
+        let obj: *mut objc::runtime::Object = msg_send![
+            obj,
+            initWithBytes:bytes
+            length:string.len()
+            encoding:UTF8_ENCODING
+        ];
+        let _: *mut c_void = msg_send![obj, autorelease];
+        obj
+    }
+}
+
+macro_rules! foreign_obj_type {
+    {type CType = $raw_ident:ident;
+    pub struct $owned_ident:ident;
+    pub struct $ref_ident:ident;
+    type ParentType = $parent_ref:ident;
+    } => {
+        foreign_obj_type! {
+            type CType = $raw_ident;
+            pub struct $owned_ident;
+            pub struct $ref_ident;
+        }
+
+        impl ::std::ops::Deref for $ref_ident {
+            type Target = $parent_ref;
+
+            #[inline]
+            fn deref(&self) -> &$parent_ref {
+                unsafe { &*(self as *const $ref_ident as *const $parent_ref)  }
+            }
+        }
+    };
+    {type CType = $raw_ident:ident;
+    pub struct $owned_ident:ident;
+    pub struct $ref_ident:ident;
+    } => {
+        foreign_type! {
+            type CType = $raw_ident;
+            fn drop = crate::obj_drop;
+            fn clone = crate::obj_clone;
+            pub struct $owned_ident;
+            pub struct $ref_ident;
+        }
+
+        unsafe impl ::objc::Message for $raw_ident {
+        }
+        unsafe impl ::objc::Message for $ref_ident {
+        }
+
+        impl ::std::fmt::Debug for $ref_ident {
+            fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
+                unsafe {
+                    let string: *mut ::objc::runtime::Object = msg_send![self, debugDescription];
+                    write!(f, "{}", crate::nsstring_as_str(&*string))
+                }
+            }
+        }
+
+        impl ::std::fmt::Debug for $owned_ident {
+            fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
+                ::std::ops::Deref::deref(self).fmt(f)
+            }
+        }
+    };
+}
+
+macro_rules! try_objc {
+    {
+        $err_name: ident => $body:expr
+    } => {
+        {
+            let mut $err_name: *mut ::objc::runtime::Object = ::std::ptr::null_mut();
+            let value = $body;
+            if !$err_name.is_null() {
+                let desc: *mut Object = msg_send![$err_name, localizedDescription];
+                let compile_error: *const std::os::raw::c_char = msg_send![desc, UTF8String];
+                let message = CStr::from_ptr(compile_error).to_string_lossy().into_owned();
+                let () = msg_send![$err_name, release];
+                return Err(message);
+            }
+            value
+        }
+    };
+}
+
+pub struct NSArray<T> {
+    _phantom: PhantomData<T>,
+}
+
+pub struct Array<T>(*mut NSArray<T>)
+where
+    T: ForeignType + 'static,
+    T::Ref: objc::Message + 'static;
+pub struct ArrayRef<T>(foreign_types::Opaque, PhantomData<T>)
+where
+    T: ForeignType + 'static,
+    T::Ref: objc::Message + 'static;
+
+impl<T> Drop for Array<T>
+where
+    T: ForeignType + 'static,
+    T::Ref: objc::Message + 'static,
+{
+    fn drop(&mut self) {
+        unsafe {
+            let () = msg_send![self.0, release];
+        }
+    }
+}
+
+impl<T> Clone for Array<T>
+where
+    T: ForeignType + 'static,
+    T::Ref: objc::Message + 'static,
+{
+    fn clone(&self) -> Self {
+        unsafe { Array(msg_send![self.0, retain]) }
+    }
+}
+
+unsafe impl<T> objc::Message for NSArray<T>
+where
+    T: ForeignType + 'static,
+    T::Ref: objc::Message + 'static,
+{
+}
+unsafe impl<T> objc::Message for ArrayRef<T>
+where
+    T: ForeignType + 'static,
+    T::Ref: objc::Message + 'static,
+{
+}
+
+impl<T> Array<T>
+where
+    T: ForeignType + 'static,
+    T::Ref: objc::Message + 'static,
+{
+    pub fn from_slice<'a>(s: &[&T::Ref]) -> &'a ArrayRef<T> {
+        unsafe {
+            let class = class!(NSArray);
+            msg_send![class, arrayWithObjects: s.as_ptr() count: s.len()]
+        }
+    }
+
+    pub fn from_owned_slice<'a>(s: &[T]) -> &'a ArrayRef<T> {
+        unsafe {
+            let class = class!(NSArray);
+            msg_send![class, arrayWithObjects: s.as_ptr() count: s.len()]
+        }
+    }
+}
+
+impl<T> foreign_types::ForeignType for Array<T>
+where
+    T: ForeignType + 'static,
+    T::Ref: objc::Message + 'static,
+{
+    type CType = NSArray<T>;
+    type Ref = ArrayRef<T>;
+
+    unsafe fn from_ptr(p: *mut NSArray<T>) -> Self {
+        Array(p)
+    }
+
+    fn as_ptr(&self) -> *mut NSArray<T> {
+        self.0
+    }
+}
+
+impl<T> foreign_types::ForeignTypeRef for ArrayRef<T>
+where
+    T: ForeignType + 'static,
+    T::Ref: objc::Message + 'static,
+{
+    type CType = NSArray<T>;
+}
+
+impl<T> Deref for Array<T>
+where
+    T: ForeignType + 'static,
+    T::Ref: objc::Message + 'static,
+{
+    type Target = ArrayRef<T>;
+
+    #[inline]
+    fn deref(&self) -> &ArrayRef<T> {
+        unsafe { mem::transmute(self.as_ptr()) }
+    }
+}
+
+impl<T> Borrow<ArrayRef<T>> for Array<T>
+where
+    T: ForeignType + 'static,
+    T::Ref: objc::Message + 'static,
+{
+    fn borrow(&self) -> &ArrayRef<T> {
+        unsafe { mem::transmute(self.as_ptr()) }
+    }
+}
+
+impl<T> ToOwned for ArrayRef<T>
+where
+    T: ForeignType + 'static,
+    T::Ref: objc::Message + 'static,
+{
+    type Owned = Array<T>;
+
+    fn to_owned(&self) -> Array<T> {
+        unsafe { Array::from_ptr(msg_send![self, retain]) }
+    }
+}
+
+pub enum CAMetalDrawable {}
+
+foreign_obj_type! {
+    type CType = CAMetalDrawable;
+    pub struct MetalDrawable;
+    pub struct MetalDrawableRef;
+    type ParentType = DrawableRef;
+}
+
+impl MetalDrawableRef {
+    pub fn texture(&self) -> &TextureRef {
+        unsafe { msg_send![self, texture] }
+    }
+}
+
+pub enum CAMetalLayer {}
+
+foreign_obj_type! {
+    type CType = CAMetalLayer;
+    pub struct MetalLayer;
+    pub struct MetalLayerRef;
+}
+
+impl MetalLayer {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(CAMetalLayer);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl MetalLayerRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+
+    pub fn set_device(&self, device: &DeviceRef) {
+        unsafe { msg_send![self, setDevice: device] }
+    }
+
+    pub fn pixel_format(&self) -> MTLPixelFormat {
+        unsafe { msg_send![self, pixelFormat] }
+    }
+
+    pub fn set_pixel_format(&self, pixel_format: MTLPixelFormat) {
+        unsafe { msg_send![self, setPixelFormat: pixel_format] }
+    }
+
+    pub fn drawable_size(&self) -> CGSize {
+        unsafe { msg_send![self, drawableSize] }
+    }
+
+    pub fn set_drawable_size(&self, size: CGSize) {
+        unsafe { msg_send![self, setDrawableSize: size] }
+    }
+
+    pub fn presents_with_transaction(&self) -> bool {
+        unsafe {
+            match msg_send![self, presentsWithTransaction] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn set_presents_with_transaction(&self, transaction: bool) {
+        unsafe { msg_send![self, setPresentsWithTransaction: transaction] }
+    }
+
+    pub fn display_sync_enabled(&self) -> bool {
+        unsafe {
+            match msg_send![self, displaySyncEnabled] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn set_display_sync_enabled(&self, enabled: bool) {
+        unsafe { msg_send![self, setDisplaySyncEnabled: enabled] }
+    }
+
+    pub fn maximum_drawable_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, maximumDrawableCount] }
+    }
+
+    pub fn set_maximum_drawable_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setMaximumDrawableCount: count] }
+    }
+
+    pub fn set_edge_antialiasing_mask(&self, mask: u64) {
+        unsafe { msg_send![self, setEdgeAntialiasingMask: mask] }
+    }
+
+    pub fn set_masks_to_bounds(&self, masks: bool) {
+        unsafe { msg_send![self, setMasksToBounds: masks] }
+    }
+
+    pub fn remove_all_animations(&self) {
+        unsafe { msg_send![self, removeAllAnimations] }
+    }
+
+    pub fn next_drawable(&self) -> Option<&MetalDrawableRef> {
+        unsafe { msg_send![self, nextDrawable] }
+    }
+
+    pub fn contents_scale(&self) -> CGFloat {
+        unsafe { msg_send![self, contentsScale] }
+    }
+
+    pub fn set_contents_scale(&self, scale: CGFloat) {
+        unsafe { msg_send![self, setContentsScale: scale] }
+    }
+
+    /// [framebufferOnly Apple Docs](https://developer.apple.com/documentation/metal/mtltexture/1515749-framebufferonly?language=objc)
+    pub fn framebuffer_only(&self) -> bool {
+        unsafe {
+            match msg_send![self, framebufferOnly] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn set_framebuffer_only(&self, framebuffer_only: bool) {
+        unsafe { msg_send![self, setFramebufferOnly: framebuffer_only] }
+    }
+
+    pub fn is_opaque(&self) -> bool {
+        unsafe {
+            match msg_send![self, isOpaque] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn set_opaque(&self, opaque: bool) {
+        unsafe { msg_send![self, setOpaque: opaque] }
+    }
+
+    pub fn wants_extended_dynamic_range_content(&self) -> bool {
+        unsafe {
+            match msg_send![self, wantsExtendedDynamicRangeContent] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn set_wants_extended_dynamic_range_content(
+        &self,
+        wants_extended_dynamic_range_content: bool,
+    ) {
+        unsafe {
+            msg_send![
+                self,
+                setWantsExtendedDynamicRangeContent: wants_extended_dynamic_range_content
+            ]
+        }
+    }
+}
+
+mod argument;
+mod buffer;
+mod capturedescriptor;
+mod capturemanager;
+mod commandbuffer;
+mod commandqueue;
+mod constants;
+mod depthstencil;
+mod device;
+mod drawable;
+mod encoder;
+mod heap;
+mod indirect_encoder;
+mod library;
+#[cfg(feature = "mps")]
+mod mps;
+mod pipeline;
+mod renderpass;
+mod resource;
+mod sampler;
+mod sync;
+mod texture;
+mod types;
+mod vertexdescriptor;
+
+#[rustfmt::skip]
+pub use {
+    argument::*,
+    buffer::*,
+    capturedescriptor::*,
+    capturemanager::*,
+    commandbuffer::*,
+    commandqueue::*,
+    constants::*,
+    depthstencil::*,
+    device::*,
+    drawable::*,
+    encoder::*,
+    heap::*,
+    indirect_encoder::*,
+    library::*,
+    pipeline::*,
+    renderpass::*,
+    resource::*,
+    sampler::*,
+    texture::*,
+    types::*,
+    vertexdescriptor::*,
+    sync::*,
+};
+
+#[cfg(feature = "mps")]
+pub use mps::*;
+
+#[inline]
+unsafe fn obj_drop<T>(p: *mut T) {
+    msg_send![(p as *mut Object), release]
+}
+
+#[inline]
+unsafe fn obj_clone<T: 'static>(p: *mut T) -> *mut T {
+    msg_send![(p as *mut Object), retain]
+}
+
+#[allow(non_camel_case_types)]
+type c_size_t = usize;
+
+// TODO: expand supported interface
+pub enum NSURL {}
+
+foreign_obj_type! {
+    type CType = NSURL;
+    pub struct URL;
+    pub struct URLRef;
+}
+
+impl URL {
+    pub fn new_with_string(string: &str) -> Self {
+        unsafe {
+            let ns_str = crate::nsstring_from_str(string);
+            let class = class!(NSURL);
+            msg_send![class, URLWithString: ns_str]
+        }
+    }
+}
+
+impl URLRef {
+    pub fn absolute_string(&self) -> &str {
+        unsafe {
+            let absolute_string = msg_send![self, absoluteString];
+            crate::nsstring_as_str(absolute_string)
+        }
+    }
+}
diff --git a/third_party/rust/metal/src/library.rs b/third_party/rust/metal/src/library.rs
new file mode 100644
index 0000000000..9a5a36b62e
--- /dev/null
+++ b/third_party/rust/metal/src/library.rs
@@ -0,0 +1,982 @@
+// Copyright 2017 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+
+use foreign_types::ForeignType;
+use objc::runtime::{Object, BOOL, NO, YES};
+
+use std::ffi::CStr;
+use std::os::raw::{c_char, c_void};
+use std::ptr;
+
+/// Only available on (macos(10.12), ios(10.0)
+#[repr(u64)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+pub enum MTLPatchType {
+    None = 0,
+    Triangle = 1,
+    Quad = 2,
+}
+
+pub enum MTLVertexAttribute {}
+
+foreign_obj_type! {
+    type CType = MTLVertexAttribute;
+    pub struct VertexAttribute;
+    pub struct VertexAttributeRef;
+}
+
+impl VertexAttributeRef {
+    pub fn name(&self) -> &str {
+        unsafe {
+            let name = msg_send![self, name];
+            crate::nsstring_as_str(name)
+        }
+    }
+
+    pub fn attribute_index(&self) -> u64 {
+        unsafe { msg_send![self, attributeIndex] }
+    }
+
+    pub fn attribute_type(&self) -> MTLDataType {
+        unsafe { msg_send![self, attributeType] }
+    }
+
+    pub fn is_active(&self) -> bool {
+        unsafe {
+            match msg_send![self, isActive] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    /// Only available on (macos(10.12), ios(10.0)
+    pub fn is_patch_data(&self) -> bool {
+        unsafe {
+            match msg_send![self, isPatchData] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    /// Only available on (macos(10.12), ios(10.0)
+    pub fn is_patch_control_point_data(&self) -> bool {
+        unsafe {
+            match msg_send![self, isPatchControlPointData] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+}
+
+/// Only available on (macos(10.12), ios(10.0))
+pub enum MTLAttribute {}
+
+foreign_obj_type! {
+    type CType = MTLAttribute;
+    pub struct Attribute;
+    pub struct AttributeRef;
+}
+
+impl AttributeRef {
+    pub fn name(&self) -> &str {
+        unsafe {
+            let name = msg_send![self, name];
+            crate::nsstring_as_str(name)
+        }
+    }
+
+    pub fn attribute_index(&self) -> u64 {
+        unsafe { msg_send![self, attributeIndex] }
+    }
+
+    pub fn attribute_type(&self) -> MTLDataType {
+        unsafe { msg_send![self, attributeType] }
+    }
+
+    pub fn is_active(&self) -> bool {
+        unsafe {
+            match msg_send![self, isActive] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    /// Only available on (macos(10.12), ios(10.0))
+    pub fn is_patch_data(&self) -> bool {
+        unsafe {
+            match msg_send![self, isPatchData] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    /// Only available on (macos(10.12), ios(10.0))
+    pub fn is_patch_control_point_data(&self) -> bool {
+        unsafe {
+            match msg_send![self, isPatchControlPointData] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+}
+
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLFunctionType {
+    Vertex = 1,
+    Fragment = 2,
+    Kernel = 3,
+    /// Only available on (macos(11.0), ios(14.0))
+    Visible = 5,
+    /// Only available on (macos(11.0), ios(14.0))
+    Intersection = 6,
+}
+
+/// Only available on (macos(10.12), ios(10.0))
+pub enum MTLFunctionConstant {}
+
+foreign_obj_type! {
+    type CType = MTLFunctionConstant;
+    pub struct FunctionConstant;
+    pub struct FunctionConstantRef;
+}
+
+impl FunctionConstantRef {
+    pub fn name(&self) -> &str {
+        unsafe {
+            let name = msg_send![self, name];
+            crate::nsstring_as_str(name)
+        }
+    }
+
+    pub fn data_type(&self) -> MTLDataType {
+        unsafe { msg_send![self, type] }
+    }
+
+    pub fn index(&self) -> NSUInteger {
+        unsafe { msg_send![self, index] }
+    }
+
+    pub fn required(&self) -> bool {
+        unsafe {
+            match msg_send![self, required] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+}
+
+bitflags! {
+    /// Only available on (macos(11.0), ios(14.0))
+    pub struct MTLFunctionOptions: NSUInteger {
+        const None = 0;
+        const CompileToBinary = 1 << 0;
+    }
+}
+
+/// Only available on (macos(11.0), ios(14.0))
+pub enum MTLFunctionDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLFunctionDescriptor;
+    pub struct FunctionDescriptor;
+    pub struct FunctionDescriptorRef;
+}
+
+impl FunctionDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLFunctionDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl FunctionDescriptorRef {
+    pub fn name(&self) -> &str {
+        unsafe {
+            let name = msg_send![self, name];
+            crate::nsstring_as_str(name)
+        }
+    }
+
+    pub fn set_name(&self, name: &str) {
+        unsafe {
+            let ns_name = crate::nsstring_from_str(name);
+            let () = msg_send![self, setName: ns_name];
+        }
+    }
+
+    pub fn specialized_name(&self) -> &str {
+        unsafe {
+            let name = msg_send![self, specializedName];
+            crate::nsstring_as_str(name)
+        }
+    }
+
+    pub fn set_specialized_name(&self, name: &str) {
+        unsafe {
+            let ns_name = crate::nsstring_from_str(name);
+            let () = msg_send![self, setSpecializedName: ns_name];
+        }
+    }
+
+    pub fn constant_values(&self) -> &FunctionConstantValuesRef {
+        unsafe { msg_send![self, constantValues] }
+    }
+
+    pub fn set_constant_values(&self, values: &FunctionConstantValuesRef) {
+        unsafe { msg_send![self, setConstantValues: values] }
+    }
+
+    pub fn options(&self) -> MTLFunctionOptions {
+        unsafe { msg_send![self, options] }
+    }
+
+    pub fn set_options(&self, options: MTLFunctionOptions) {
+        unsafe { msg_send![self, setOptions: options] }
+    }
+}
+
+/// Only available on (macos(11.0), ios(14.0))
+pub enum MTLIntersectionFunctionDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLIntersectionFunctionDescriptor;
+    pub struct IntersectionFunctionDescriptor;
+    pub struct IntersectionFunctionDescriptorRef;
+    type ParentType = FunctionDescriptorRef;
+}
+
+/// Only available on (macos(11.0), ios(14.0))
+pub enum MTLFunctionHandle {}
+
+foreign_obj_type! {
+    type CType = MTLFunctionHandle;
+    pub struct FunctionHandle;
+    pub struct FunctionHandleRef;
+}
+
+impl FunctionHandleRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+
+    pub fn name(&self) -> &str {
+        unsafe {
+            let ns_name = msg_send![self, name];
+            crate::nsstring_as_str(ns_name)
+        }
+    }
+
+    pub fn function_type(&self) -> MTLFunctionType {
+        unsafe { msg_send![self, functionType] }
+    }
+}
+
+// TODO:
+// MTLVisibleFunctionTableDescriptor
+// MTLVisibleFunctionTable
+// MTLIntersectionFunctionSignature
+// MTLIntersectionFunctionTableDescriptor
+// MTLIntersectionFunctionTable
+
+pub enum MTLFunction {}
+
+foreign_obj_type! {
+    type CType = MTLFunction;
+    pub struct Function;
+    pub struct FunctionRef;
+}
+
+impl FunctionRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+
+    /// Only available on (macos(10.12), ios(10.0))
+    pub fn label(&self) -> &str {
+        unsafe {
+            let ns_label = msg_send![self, label];
+            crate::nsstring_as_str(ns_label)
+        }
+    }
+
+    /// Only available on (macos(10.12), ios(10.0))
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let ns_label = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: ns_label];
+        }
+    }
+
+    pub fn name(&self) -> &str {
+        unsafe {
+            let name = msg_send![self, name];
+            crate::nsstring_as_str(name)
+        }
+    }
+
+    pub fn function_type(&self) -> MTLFunctionType {
+        unsafe { msg_send![self, functionType] }
+    }
+
+    /// Only available on (macos(10.12), ios(10.0))
+    pub fn patch_type(&self) -> MTLPatchType {
+        unsafe { msg_send![self, patchType] }
+    }
+
+    /// Only available on (macos(10.12), ios(10.0))
+    pub fn patch_control_point_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, patchControlPointCount] }
+    }
+
+    /// Only available on (macos(10.12), ios(10.0))
+    pub fn vertex_attributes(&self) -> &Array<VertexAttribute> {
+        unsafe { msg_send![self, vertexAttributes] }
+    }
+
+    /// Only available on (macos(10.12), ios(10.0))
+    pub fn stage_input_attributes(&self) -> &Array<Attribute> {
+        unsafe { msg_send![self, stageInputAttributes] }
+    }
+
+    pub fn new_argument_encoder(&self, buffer_index: NSUInteger) -> ArgumentEncoder {
+        unsafe {
+            let ptr = msg_send![self, newArgumentEncoderWithBufferIndex: buffer_index];
+            ArgumentEncoder::from_ptr(ptr)
+        }
+    }
+
+    pub fn function_constants_dictionary(&self) -> *mut Object {
+        unsafe { msg_send![self, functionConstantsDictionary] }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn options(&self) -> MTLFunctionOptions {
+        unsafe { msg_send![self, options] }
+    }
+}
+
+#[repr(u64)]
+#[derive(Clone, Copy, Debug, Hash, Eq, PartialEq, Ord, PartialOrd)]
+pub enum MTLLanguageVersion {
+    V1_0 = 0x10000,
+    V1_1 = 0x10001,
+    V1_2 = 0x10002,
+    V2_0 = 0x20000,
+    V2_1 = 0x20001,
+    V2_2 = 0x20002,
+    /// available on macOS 11.0+, iOS 14.0+
+    V2_3 = 0x20003,
+    /// available on macOS 12.0+, iOS 15.0+
+    V2_4 = 0x20004,
+}
+
+pub enum MTLFunctionConstantValues {}
+
+foreign_obj_type! {
+    type CType = MTLFunctionConstantValues;
+    pub struct FunctionConstantValues;
+    pub struct FunctionConstantValuesRef;
+}
+
+impl FunctionConstantValues {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLFunctionConstantValues);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl FunctionConstantValuesRef {
+    pub fn set_constant_value_at_index(
+        &self,
+        value: *const c_void,
+        ty: MTLDataType,
+        index: NSUInteger,
+    ) {
+        unsafe { msg_send![self, setConstantValue:value type:ty atIndex:index] }
+    }
+
+    pub fn set_constant_values_with_range(
+        &self,
+        values: *const c_void,
+        ty: MTLDataType,
+        range: NSRange,
+    ) {
+        unsafe { msg_send![self, setConstantValues:values type:ty withRange:range] }
+    }
+
+    pub fn set_constant_value_with_name(&self, value: *const c_void, ty: MTLDataType, name: &str) {
+        unsafe {
+            let ns_name = crate::nsstring_from_str(name);
+            msg_send![self, setConstantValue:value type:ty withName:ns_name]
+        }
+    }
+}
+
+/// Only available on (macos(11.0), ios(14.0))
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLLibraryType {
+    Executable = 0,
+    Dynamic = 1,
+}
+
+pub enum MTLCompileOptions {}
+
+foreign_obj_type! {
+    type CType = MTLCompileOptions;
+    pub struct CompileOptions;
+    pub struct CompileOptionsRef;
+}
+
+impl CompileOptions {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLCompileOptions);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl CompileOptionsRef {
+    pub unsafe fn preprocessor_macros(&self) -> *mut Object {
+        msg_send![self, preprocessorMacros]
+    }
+
+    pub unsafe fn set_preprocessor_macros(&self, defines: *mut Object) {
+        msg_send![self, setPreprocessorMacros: defines]
+    }
+
+    pub fn is_fast_math_enabled(&self) -> bool {
+        unsafe {
+            match msg_send![self, fastMathEnabled] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn set_fast_math_enabled(&self, enabled: bool) {
+        unsafe { msg_send![self, setFastMathEnabled: enabled] }
+    }
+
+    /// Only available on (macos(10.11), ios(9.0))
+    pub fn language_version(&self) -> MTLLanguageVersion {
+        unsafe { msg_send![self, languageVersion] }
+    }
+
+    /// Only available on (macos(10.11), ios(9.0))
+    pub fn set_language_version(&self, version: MTLLanguageVersion) {
+        unsafe { msg_send![self, setLanguageVersion: version] }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn library_type(&self) -> MTLLibraryType {
+        unsafe { msg_send![self, libraryType] }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn set_library_type(&self, lib_type: MTLLibraryType) {
+        unsafe { msg_send![self, setLibraryType: lib_type] }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn install_name(&self) -> &str {
+        unsafe {
+            let name = msg_send![self, installName];
+            crate::nsstring_as_str(name)
+        }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn set_install_name(&self, name: &str) {
+        unsafe {
+            let install_name = crate::nsstring_from_str(name);
+            let () = msg_send![self, setInstallName: install_name];
+        }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    ///
+    /// Marshal to Rust Vec
+    pub fn libraries(&self) -> Vec<DynamicLibrary> {
+        unsafe {
+            let libraries: *mut Object = msg_send![self, libraries];
+            let count: NSUInteger = msg_send![libraries, count];
+            let ret = (0..count)
+                .map(|i| {
+                    let lib = msg_send![libraries, objectAtIndex: i];
+                    DynamicLibrary::from_ptr(lib)
+                })
+                .collect();
+            ret
+        }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    ///
+    /// As raw NSArray
+    pub fn libraries_as_nsarray(&self) -> &ArrayRef<DynamicLibrary> {
+        unsafe { msg_send![self, libraries] }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    ///
+    /// Marshal from Rust slice
+    pub fn set_libraries(&self, libraries: &[&DynamicLibraryRef]) {
+        let ns_array = Array::<DynamicLibrary>::from_slice(libraries);
+        unsafe { msg_send![self, setLibraries: ns_array] }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    ///
+    /// From raw NSArray
+    pub fn set_libraries_nsarray(&self, libraries: &ArrayRef<DynamicLibrary>) {
+        unsafe { msg_send![self, setLibraries: libraries] }
+    }
+
+    /// Only available on (macos(11.0), macCatalyst(14.0), ios(13.0))
+    pub fn preserve_invariance(&self) -> bool {
+        unsafe {
+            match msg_send![self, preserveInvariance] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    /// Only available on (macos(11.0), macCatalyst(14.0), ios(13.0))
+    pub fn set_preserve_invariance(&self, preserve: bool) {
+        unsafe { msg_send![self, setPreserveInvariance: preserve] }
+    }
+}
+
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLLibraryError {
+    Unsupported = 1,
+    Internal = 2,
+    CompileFailure = 3,
+    CompileWarning = 4,
+    /// Only available on (macos(10.12), ios(10.0))
+    FunctionNotFound = 5,
+    /// Only available on (macos(10.12), ios(10.0))
+    FileNotFound = 6,
+}
+
+pub enum MTLLibrary {}
+
+foreign_obj_type! {
+    type CType = MTLLibrary;
+    pub struct Library;
+    pub struct LibraryRef;
+}
+
+impl LibraryRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: nslabel];
+        }
+    }
+
+    // FIXME: should rename to new_function
+    pub fn get_function(
+        &self,
+        name: &str,
+        constants: Option<FunctionConstantValues>,
+    ) -> Result<Function, String> {
+        unsafe {
+            let nsname = crate::nsstring_from_str(name);
+
+            let function: *mut MTLFunction = match constants {
+                Some(c) => try_objc! { err => msg_send![self,
+                    newFunctionWithName: nsname.as_ref()
+                    constantValues: c.as_ref()
+                    error: &mut err
+                ]},
+                None => msg_send![self, newFunctionWithName: nsname.as_ref()],
+            };
+
+            if !function.is_null() {
+                Ok(Function::from_ptr(function))
+            } else {
+                Err(format!("Function '{}' does not exist", name))
+            }
+        }
+    }
+
+    // TODO: get_function_async with completion handler
+
+    pub fn function_names(&self) -> Vec<String> {
+        unsafe {
+            let names: *mut Object = msg_send![self, functionNames];
+            let count: NSUInteger = msg_send![names, count];
+            let ret = (0..count)
+                .map(|i| {
+                    let name = msg_send![names, objectAtIndex: i];
+                    nsstring_as_str(name).to_string()
+                })
+                .collect();
+            let () = msg_send![names, release];
+            ret
+        }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn library_type(&self) -> MTLLibraryType {
+        unsafe { msg_send![self, type] }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn install_name(&self) -> Option<&str> {
+        unsafe {
+            let maybe_name: *mut Object = msg_send![self, installName];
+            maybe_name.as_ref().map(crate::nsstring_as_str)
+        }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn new_function_with_descriptor(
+        &self,
+        descriptor: &FunctionDescriptorRef,
+    ) -> Result<Function, String> {
+        unsafe {
+            let function: *mut MTLFunction = try_objc! {
+                err => msg_send![self,
+                    newFunctionWithDescriptor: descriptor
+                    error: &mut err
+                ]
+            };
+
+            if !function.is_null() {
+                Ok(Function::from_ptr(function))
+            } else {
+                Err(String::from("new_function_with_descriptor() failed"))
+            }
+        }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn new_intersection_function_with_descriptor(
+        &self,
+        descriptor: &IntersectionFunctionDescriptorRef,
+    ) -> Result<Function, String> {
+        unsafe {
+            let function: *mut MTLFunction = try_objc! {
+                err => msg_send![self,
+                    newIntersectionFunctionWithDescriptor: descriptor
+                    error: &mut err
+                ]
+            };
+
+            if !function.is_null() {
+                Ok(Function::from_ptr(function))
+            } else {
+                Err(String::from(
+                    "new_intersection_function_with_descriptor() failed",
+                ))
+            }
+        }
+    }
+}
+
+/// Only available on (macos(11.0), ios(14.0))
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLDynamicLibraryError {
+    None = 0,
+    InvalidFile = 1,
+    CompilationFailure = 2,
+    UnresolvedInstallName = 3,
+    DependencyLoadFailure = 4,
+    Unsupported = 5,
+}
+
+pub enum MTLDynamicLibrary {}
+
+foreign_obj_type! {
+    type CType = MTLDynamicLibrary;
+    pub struct DynamicLibrary;
+    pub struct DynamicLibraryRef;
+}
+
+impl DynamicLibraryRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: nslabel];
+        }
+    }
+
+    pub fn install_name(&self) -> &str {
+        unsafe {
+            let name = msg_send![self, installName];
+            crate::nsstring_as_str(name)
+        }
+    }
+
+    pub fn serialize_to_url(&self, url: &URLRef) -> Result<bool, String> {
+        unsafe {
+            let mut err: *mut Object = ptr::null_mut();
+            let result: BOOL = msg_send![self, serializeToURL:url
+                                                        error:&mut err];
+            if !err.is_null() {
+                // FIXME: copy pasta
+                let desc: *mut Object = msg_send![err, localizedDescription];
+                let c_msg: *const c_char = msg_send![desc, UTF8String];
+                let message = CStr::from_ptr(c_msg).to_string_lossy().into_owned();
+                Err(message)
+            } else {
+                match result {
+                    YES => Ok(true),
+                    NO => Ok(false),
+                    _ => unreachable!(),
+                }
+            }
+        }
+    }
+}
+
+/// macOS 11.0+ iOS 14.0+
+pub enum MTLBinaryArchiveDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLBinaryArchiveDescriptor;
+    pub struct BinaryArchiveDescriptor;
+    pub struct BinaryArchiveDescriptorRef;
+}
+
+impl BinaryArchiveDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLBinaryArchiveDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl BinaryArchiveDescriptorRef {
+    pub fn url(&self) -> &URLRef {
+        unsafe { msg_send![self, url] }
+    }
+    pub fn set_url(&self, url: &URLRef) {
+        unsafe { msg_send![self, setUrl: url] }
+    }
+}
+
+/// macOS 11.0+ iOS 14.0+
+pub enum MTLBinaryArchive {}
+
+foreign_obj_type! {
+    type CType = MTLBinaryArchive;
+    pub struct BinaryArchive;
+    pub struct BinaryArchiveRef;
+}
+
+impl BinaryArchiveRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: nslabel];
+        }
+    }
+
+    pub fn add_compute_pipeline_functions_with_descriptor(
+        &self,
+        descriptor: &ComputePipelineDescriptorRef,
+    ) -> Result<bool, String> {
+        unsafe {
+            let mut err: *mut Object = ptr::null_mut();
+            let result: BOOL = msg_send![self, addComputePipelineFunctionsWithDescriptor:descriptor
+                                                                        error:&mut err];
+            if !err.is_null() {
+                // FIXME: copy pasta
+                let desc: *mut Object = msg_send![err, localizedDescription];
+                let c_msg: *const c_char = msg_send![desc, UTF8String];
+                let message = CStr::from_ptr(c_msg).to_string_lossy().into_owned();
+                Err(message)
+            } else {
+                match result {
+                    YES => Ok(true),
+                    NO => Ok(false),
+                    _ => unreachable!(),
+                }
+            }
+        }
+    }
+
+    pub fn add_render_pipeline_functions_with_descriptor(
+        &self,
+        descriptor: &RenderPipelineDescriptorRef,
+    ) -> Result<bool, String> {
+        unsafe {
+            let mut err: *mut Object = ptr::null_mut();
+            let result: BOOL = msg_send![self, addRenderPipelineFunctionsWithDescriptor:descriptor
+                                                                        error:&mut err];
+            if !err.is_null() {
+                // FIXME: copy pasta
+                let desc: *mut Object = msg_send![err, localizedDescription];
+                let c_msg: *const c_char = msg_send![desc, UTF8String];
+                let message = CStr::from_ptr(c_msg).to_string_lossy().into_owned();
+                Err(message)
+            } else {
+                match result {
+                    YES => Ok(true),
+                    NO => Ok(false),
+                    _ => unreachable!(),
+                }
+            }
+        }
+    }
+
+    // TODO: addTileRenderPipelineFunctionsWithDescriptor
+    // - (BOOL)addTileRenderPipelineFunctionsWithDescriptor:(MTLTileRenderPipelineDescriptor *)descriptor
+    // error:(NSError * _Nullable *)error;
+
+    pub fn serialize_to_url(&self, url: &URLRef) -> Result<bool, String> {
+        unsafe {
+            let mut err: *mut Object = ptr::null_mut();
+            let result: BOOL = msg_send![self, serializeToURL:url
+                                                        error:&mut err];
+            if !err.is_null() {
+                // FIXME: copy pasta
+                let desc: *mut Object = msg_send![err, localizedDescription];
+                let c_msg: *const c_char = msg_send![desc, UTF8String];
+                let message = CStr::from_ptr(c_msg).to_string_lossy().into_owned();
+                Err(message)
+            } else {
+                match result {
+                    YES => Ok(true),
+                    NO => Ok(false),
+                    _ => unreachable!(),
+                }
+            }
+        }
+    }
+}
+
+/// macOS 11.0+ iOS 14.0+
+pub enum MTLLinkedFunctions {}
+
+foreign_obj_type! {
+    type CType = MTLLinkedFunctions;
+    pub struct LinkedFunctions;
+    pub struct LinkedFunctionsRef;
+}
+
+impl LinkedFunctions {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLLinkedFunctions);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl LinkedFunctionsRef {
+    /// Marshal to Rust Vec
+    pub fn functions(&self) -> Vec<Function> {
+        unsafe {
+            let functions: *mut Object = msg_send![self, functions];
+            let count: NSUInteger = msg_send![functions, count];
+            let ret = (0..count)
+                .map(|i| {
+                    let f = msg_send![functions, objectAtIndex: i];
+                    Function::from_ptr(f)
+                })
+                .collect();
+            ret
+        }
+    }
+
+    /// Marshal from Rust slice
+    pub fn set_functions(&self, functions: &[&FunctionRef]) {
+        let ns_array = Array::<Function>::from_slice(functions);
+        unsafe { msg_send![self, setFunctions: ns_array] }
+    }
+
+    /// Marshal to Rust Vec
+    pub fn binary_functions(&self) -> Vec<Function> {
+        unsafe {
+            let functions: *mut Object = msg_send![self, binaryFunctions];
+            let count: NSUInteger = msg_send![functions, count];
+            let ret = (0..count)
+                .map(|i| {
+                    let f = msg_send![functions, objectAtIndex: i];
+                    Function::from_ptr(f)
+                })
+                .collect();
+            ret
+        }
+    }
+
+    /// Marshal from Rust slice
+    pub fn set_binary_functions(&self, functions: &[&FunctionRef]) {
+        let ns_array = Array::<Function>::from_slice(functions);
+        unsafe { msg_send![self, setBinaryFunctions: ns_array] }
+    }
+
+    // TODO: figure out NSDictionary wrapper
+    // TODO: groups
+    // @property (readwrite, nonatomic, copy, nullable) NSDictionary<NSString*, NSArray<id<MTLFunction>>*> *groups;
+}
diff --git a/third_party/rust/metal/src/mps.rs b/third_party/rust/metal/src/mps.rs
new file mode 100644
index 0000000000..0d4da2eed5
--- /dev/null
+++ b/third_party/rust/metal/src/mps.rs
@@ -0,0 +1,550 @@
+// Copyright 2020 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+
+use objc::runtime::{BOOL, YES};
+
+#[link(name = "MetalPerformanceShaders", kind = "framework")]
+extern "C" {
+    fn MPSSupportsMTLDevice(device: *const std::ffi::c_void) -> BOOL;
+}
+
+pub fn mps_supports_device(device: &DeviceRef) -> bool {
+    let b: BOOL = unsafe {
+        let ptr: *const DeviceRef = device;
+        MPSSupportsMTLDevice(ptr as _)
+    };
+    b == YES
+}
+
+pub enum MPSKernel {}
+
+foreign_obj_type! {
+    type CType = MPSKernel;
+    pub struct Kernel;
+    pub struct KernelRef;
+}
+
+pub enum MPSRayDataType {
+    OriginDirection = 0,
+    OriginMinDistanceDirectionMaxDistance = 1,
+    OriginMaskDirectionMaxDistance = 2,
+}
+
+bitflags! {
+    #[allow(non_upper_case_globals)]
+    pub struct MPSRayMaskOptions: NSUInteger {
+        /// Enable primitive masks
+        const Primitive = 1;
+        /// Enable instance masks
+        const Instance = 2;
+    }
+}
+
+/// Options that determine the data contained in an intersection result.
+pub enum MPSIntersectionDataType {
+    Distance = 0,
+    DistancePrimitiveIndex = 1,
+    DistancePrimitiveIndexCoordinates = 2,
+    DistancePrimitiveIndexInstanceIndex = 3,
+    DistancePrimitiveIndexInstanceIndexCoordinates = 4,
+}
+
+pub enum MPSIntersectionType {
+    /// Find the closest intersection to the ray's origin along the ray direction.
+    /// This is potentially slower than `Any` but is well suited to primary visibility rays.
+    Nearest = 0,
+    /// Find any intersection along the ray direction. This is potentially faster than `Nearest` and
+    /// is well suited to shadow and occlusion rays.
+    Any = 1,
+}
+
+pub enum MPSRayMaskOperator {
+    /// Accept the intersection if `(primitive mask & ray mask) != 0`.
+    And = 0,
+    /// Accept the intersection if `~(primitive mask & ray mask) != 0`.
+    NotAnd = 1,
+    /// Accept the intersection if `(primitive mask | ray mask) != 0`.
+    Or = 2,
+    /// Accept the intersection if `~(primitive mask | ray mask) != 0`.
+    NotOr = 3,
+    /// Accept the intersection if `(primitive mask ^ ray mask) != 0`.
+    /// Note that this is equivalent to the "!=" operator.
+    Xor = 4,
+    /// Accept the intersection if `~(primitive mask ^ ray mask) != 0`.
+    /// Note that this is equivalent to the "==" operator.
+    NotXor = 5,
+    /// Accept the intersection if `(primitive mask < ray mask) != 0`.
+    LessThan = 6,
+    /// Accept the intersection if `(primitive mask <= ray mask) != 0`.
+    LessThanOrEqualTo = 7,
+    /// Accept the intersection if `(primitive mask > ray mask) != 0`.
+    GreaterThan = 8,
+    /// Accept the intersection if `(primitive mask >= ray mask) != 0`.
+    GreaterThanOrEqualTo = 9,
+}
+
+pub enum MPSTriangleIntersectionTestType {
+    /// Use the default ray/triangle intersection test
+    Default = 0,
+    /// Use a watertight ray/triangle intersection test which avoids gaps along shared triangle edges.
+    /// Shared vertices may still have gaps.
+    /// This intersection test may be slower than `Default`.
+    Watertight = 1,
+}
+
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MPSAccelerationStructureStatus {
+    Unbuilt = 0,
+    Built = 1,
+}
+
+bitflags! {
+    #[allow(non_upper_case_globals)]
+    pub struct MPSAccelerationStructureUsage: NSUInteger {
+        /// No usage options specified
+        const None = 0;
+        /// Option that enables support for refitting the acceleration structure after it has been built.
+        const Refit = 1;
+        /// Option indicating that the acceleration structure will be rebuilt frequently.
+        const FrequentRebuild = 2;
+        const PreferGPUBuild = 4;
+        const PreferCPUBuild = 8;
+    }
+}
+
+/// A common bit for all floating point data types.
+const MPSDataTypeFloatBit: isize = 0x10000000;
+const MPSDataTypeSignedBit: isize = 0x20000000;
+const MPSDataTypeNormalizedBit: isize = 0x40000000;
+
+pub enum MPSDataType {
+    Invalid = 0,
+
+    Float32 = MPSDataTypeFloatBit | 32,
+    Float16 = MPSDataTypeFloatBit | 16,
+
+    // Signed integers.
+    Int8 = MPSDataTypeSignedBit | 8,
+    Int16 = MPSDataTypeSignedBit | 16,
+    Int32 = MPSDataTypeSignedBit | 32,
+
+    // Unsigned integers. Range: [0, UTYPE_MAX]
+    UInt8 = 8,
+    UInt16 = 16,
+    UInt32 = 32,
+
+    // Unsigned normalized. Range: [0, 1.0]
+    Unorm1 = MPSDataTypeNormalizedBit | 1,
+    Unorm8 = MPSDataTypeNormalizedBit | 8,
+}
+
+/// A kernel that performs intersection tests between rays and geometry.
+pub enum MPSRayIntersector {}
+
+foreign_obj_type! {
+    type CType = MPSRayIntersector;
+    pub struct RayIntersector;
+    pub struct RayIntersectorRef;
+    type ParentType = KernelRef;
+}
+
+impl RayIntersector {
+    pub fn from_device(device: &DeviceRef) -> Option<Self> {
+        unsafe {
+            let intersector: RayIntersector = msg_send![class!(MPSRayIntersector), alloc];
+            let ptr: *mut Object = msg_send![intersector.as_ref(), initWithDevice: device];
+            if ptr.is_null() {
+                None
+            } else {
+                Some(intersector)
+            }
+        }
+    }
+}
+
+impl RayIntersectorRef {
+    pub fn set_cull_mode(&self, mode: MTLCullMode) {
+        unsafe { msg_send![self, setCullMode: mode] }
+    }
+
+    pub fn set_front_facing_winding(&self, winding: MTLWinding) {
+        unsafe { msg_send![self, setFrontFacingWinding: winding] }
+    }
+
+    pub fn set_intersection_data_type(&self, options: MPSIntersectionDataType) {
+        unsafe { msg_send![self, setIntersectionDataType: options] }
+    }
+
+    pub fn set_intersection_stride(&self, stride: NSUInteger) {
+        unsafe { msg_send![self, setIntersectionStride: stride] }
+    }
+
+    pub fn set_ray_data_type(&self, ty: MPSRayDataType) {
+        unsafe { msg_send![self, setRayDataType: ty] }
+    }
+
+    pub fn set_ray_index_data_type(&self, ty: MPSDataType) {
+        unsafe { msg_send![self, setRayIndexDataType: ty] }
+    }
+
+    pub fn set_ray_mask(&self, ray_mask: u32) {
+        unsafe { msg_send![self, setRayMask: ray_mask] }
+    }
+
+    pub fn set_ray_mask_operator(&self, operator: MPSRayMaskOperator) {
+        unsafe { msg_send![self, setRayMaskOperator: operator] }
+    }
+
+    pub fn set_ray_mask_options(&self, options: MPSRayMaskOptions) {
+        unsafe { msg_send![self, setRayMaskOptions: options] }
+    }
+
+    pub fn set_ray_stride(&self, stride: NSUInteger) {
+        unsafe { msg_send![self, setRayStride: stride] }
+    }
+
+    pub fn set_triangle_intersection_test_type(&self, test_type: MPSTriangleIntersectionTestType) {
+        unsafe { msg_send![self, setTriangleIntersectionTestType: test_type] }
+    }
+
+    pub fn encode_intersection_to_command_buffer(
+        &self,
+        command_buffer: &CommandBufferRef,
+        intersection_type: MPSIntersectionType,
+        ray_buffer: &BufferRef,
+        ray_buffer_offset: NSUInteger,
+        intersection_buffer: &BufferRef,
+        intersection_buffer_offset: NSUInteger,
+        ray_count: NSUInteger,
+        acceleration_structure: &AccelerationStructureRef,
+    ) {
+        unsafe {
+            msg_send![
+                self,
+                encodeIntersectionToCommandBuffer: command_buffer
+                intersectionType: intersection_type
+                rayBuffer: ray_buffer
+                rayBufferOffset: ray_buffer_offset
+                intersectionBuffer: intersection_buffer
+                intersectionBufferOffset: intersection_buffer_offset
+                rayCount: ray_count
+                accelerationStructure: acceleration_structure
+            ]
+        }
+    }
+
+    pub fn recommended_minimum_ray_batch_size_for_ray_count(
+        &self,
+        ray_count: NSUInteger,
+    ) -> NSUInteger {
+        unsafe { msg_send![self, recommendedMinimumRayBatchSizeForRayCount: ray_count] }
+    }
+}
+
+/// A group of acceleration structures which may be used together in an instance acceleration structure
+pub enum MPSAccelerationStructureGroup {}
+
+foreign_obj_type! {
+    type CType = MPSAccelerationStructureGroup;
+    pub struct AccelerationStructureGroup;
+    pub struct AccelerationStructureGroupRef;
+}
+
+impl AccelerationStructureGroup {
+    pub fn new_with_device(device: &DeviceRef) -> Option<Self> {
+        unsafe {
+            let group: AccelerationStructureGroup =
+                msg_send![class!(MPSAccelerationStructureGroup), alloc];
+            let ptr: *mut Object = msg_send![group.as_ref(), initWithDevice: device];
+            if ptr.is_null() {
+                None
+            } else {
+                Some(group)
+            }
+        }
+    }
+}
+
+impl AccelerationStructureGroupRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+}
+
+/// The base class for data structures that are built over geometry and used to accelerate ray tracing.
+pub enum MPSAccelerationStructure {}
+
+foreign_obj_type! {
+    type CType = MPSAccelerationStructure;
+    pub struct AccelerationStructure;
+    pub struct AccelerationStructureRef;
+}
+
+impl AccelerationStructureRef {
+    pub fn status(&self) -> MPSAccelerationStructureStatus {
+        unsafe { msg_send![self, status] }
+    }
+
+    pub fn usage(&self) -> MPSAccelerationStructureUsage {
+        unsafe { msg_send![self, usage] }
+    }
+
+    pub fn set_usage(&self, usage: MPSAccelerationStructureUsage) {
+        unsafe { msg_send![self, setUsage: usage] }
+    }
+
+    pub fn group(&self) -> &AccelerationStructureGroupRef {
+        unsafe { msg_send![self, group] }
+    }
+
+    pub fn encode_refit_to_command_buffer(&self, buffer: &CommandBufferRef) {
+        unsafe { msg_send![self, encodeRefitToCommandBuffer: buffer] }
+    }
+
+    pub fn rebuild(&self) {
+        unsafe { msg_send![self, rebuild] }
+    }
+}
+
+pub enum MPSPolygonAccelerationStructure {}
+
+foreign_obj_type! {
+    type CType = MPSPolygonAccelerationStructure;
+    pub struct PolygonAccelerationStructure;
+    pub struct PolygonAccelerationStructureRef;
+    type ParentType = AccelerationStructureRef;
+}
+
+impl PolygonAccelerationStructureRef {
+    pub fn set_index_buffer(&self, buffer: Option<&BufferRef>) {
+        unsafe { msg_send![self, setIndexBuffer: buffer] }
+    }
+
+    pub fn set_index_buffer_offset(&self, offset: NSUInteger) {
+        unsafe { msg_send![self, setIndexBufferOffset: offset] }
+    }
+
+    pub fn set_index_type(&self, data_type: MPSDataType) {
+        unsafe { msg_send![self, setIndexType: data_type] }
+    }
+
+    pub fn set_mask_buffer(&self, buffer: Option<&BufferRef>) {
+        unsafe { msg_send![self, setMaskBuffer: buffer] }
+    }
+
+    pub fn set_mask_buffer_offset(&self, offset: NSUInteger) {
+        unsafe { msg_send![self, setMaskBufferOffset: offset] }
+    }
+
+    pub fn set_vertex_buffer(&self, buffer: Option<&BufferRef>) {
+        unsafe { msg_send![self, setVertexBuffer: buffer] }
+    }
+
+    pub fn set_vertex_buffer_offset(&self, offset: NSUInteger) {
+        unsafe { msg_send![self, setVertexBufferOffset: offset] }
+    }
+
+    pub fn set_vertex_stride(&self, stride: NSUInteger) {
+        unsafe { msg_send![self, setVertexStride: stride] }
+    }
+}
+
+/// An acceleration structure built over triangles.
+pub enum MPSTriangleAccelerationStructure {}
+
+foreign_obj_type! {
+    type CType = MPSTriangleAccelerationStructure;
+    pub struct TriangleAccelerationStructure;
+    pub struct TriangleAccelerationStructureRef;
+    type ParentType = PolygonAccelerationStructureRef;
+}
+
+impl TriangleAccelerationStructure {
+    pub fn from_device(device: &DeviceRef) -> Option<Self> {
+        unsafe {
+            let structure: TriangleAccelerationStructure =
+                msg_send![class!(MPSTriangleAccelerationStructure), alloc];
+            let ptr: *mut Object = msg_send![structure.as_ref(), initWithDevice: device];
+            if ptr.is_null() {
+                None
+            } else {
+                Some(structure)
+            }
+        }
+    }
+}
+
+impl TriangleAccelerationStructureRef {
+    pub fn triangle_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, triangleCount] }
+    }
+
+    pub fn set_triangle_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setTriangleCount: count] }
+    }
+}
+
+#[repr(u64)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+pub enum MPSTransformType {
+    Float4x4 = 0,
+    Identity = 1,
+}
+
+/// An acceleration structure built over instances of other acceleration structures
+pub enum MPSInstanceAccelerationStructure {}
+
+foreign_obj_type! {
+    type CType = MPSInstanceAccelerationStructure;
+    pub struct InstanceAccelerationStructure;
+    pub struct InstanceAccelerationStructureRef;
+    type ParentType = AccelerationStructureRef;
+}
+
+impl InstanceAccelerationStructure {
+    pub fn init_with_group(group: &AccelerationStructureGroupRef) -> Option<Self> {
+        unsafe {
+            let structure: InstanceAccelerationStructure =
+                msg_send![class!(MPSInstanceAccelerationStructure), alloc];
+            let ptr: *mut Object = msg_send![structure.as_ref(), initWithGroup: group];
+            if ptr.is_null() {
+                None
+            } else {
+                Some(structure)
+            }
+        }
+    }
+}
+
+impl InstanceAccelerationStructureRef {
+    /// Marshal to Rust Vec
+    pub fn acceleration_structures(&self) -> Vec<PolygonAccelerationStructure> {
+        unsafe {
+            let acs: *mut Object = msg_send![self, accelerationStructures];
+            let count: NSUInteger = msg_send![acs, count];
+            let ret = (0..count)
+                .map(|i| {
+                    let ac = msg_send![acs, objectAtIndex: i];
+                    PolygonAccelerationStructure::from_ptr(ac)
+                })
+                .collect();
+            ret
+        }
+    }
+
+    /// Marshal from Rust slice
+    pub fn set_acceleration_structures(&self, acs: &[&PolygonAccelerationStructureRef]) {
+        let ns_array = Array::<PolygonAccelerationStructure>::from_slice(acs);
+        unsafe { msg_send![self, setAccelerationStructures: ns_array] }
+    }
+
+    pub fn instance_buffer(&self) -> &BufferRef {
+        unsafe { msg_send![self, instanceBuffer] }
+    }
+
+    pub fn set_instance_buffer(&self, buffer: &BufferRef) {
+        unsafe { msg_send![self, setInstanceBuffer: buffer] }
+    }
+
+    pub fn instance_buffer_offset(&self) -> NSUInteger {
+        unsafe { msg_send![self, instanceBufferOffset] }
+    }
+
+    pub fn set_instance_buffer_offset(&self, offset: NSUInteger) {
+        unsafe { msg_send![self, setInstanceBufferOffset: offset] }
+    }
+
+    pub fn transform_buffer(&self) -> &BufferRef {
+        unsafe { msg_send![self, transformBuffer] }
+    }
+
+    pub fn set_transform_buffer(&self, buffer: &BufferRef) {
+        unsafe { msg_send![self, setTransformBuffer: buffer] }
+    }
+
+    pub fn transform_buffer_offset(&self) -> NSUInteger {
+        unsafe { msg_send![self, transformBufferOffset] }
+    }
+
+    pub fn set_transform_buffer_offset(&self, offset: NSUInteger) {
+        unsafe { msg_send![self, setTransformBufferOffset: offset] }
+    }
+
+    pub fn transform_type(&self) -> MPSTransformType {
+        unsafe { msg_send![self, transformType] }
+    }
+
+    pub fn set_transform_type(&self, transform_type: MPSTransformType) {
+        unsafe { msg_send![self, setTransformType: transform_type] }
+    }
+
+    pub fn mask_buffer(&self) -> &BufferRef {
+        unsafe { msg_send![self, maskBuffer] }
+    }
+
+    pub fn set_mask_buffer(&self, buffer: &BufferRef) {
+        unsafe { msg_send![self, setMaskBuffer: buffer] }
+    }
+
+    pub fn mask_buffer_offset(&self) -> NSUInteger {
+        unsafe { msg_send![self, maskBufferOffset] }
+    }
+
+    pub fn set_mask_buffer_offset(&self, offset: NSUInteger) {
+        unsafe { msg_send![self, setMaskBufferOffset: offset] }
+    }
+
+    pub fn instance_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, instanceCount] }
+    }
+
+    pub fn set_instance_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setInstanceCount: count] }
+    }
+}
+
+#[repr(C)]
+pub struct MPSPackedFloat3 {
+    pub elements: [f32; 3],
+}
+
+/// Represents a 3D ray with an origin, a direction, and an intersection distance range from the origin.
+#[repr(C)]
+pub struct MPSRayOriginMinDistanceDirectionMaxDistance {
+    /// Ray origin. The intersection test will be skipped if the origin contains NaNs or infinities.
+    pub origin: MPSPackedFloat3,
+    /// Minimum intersection distance from the origin along the ray direction.
+    /// The intersection test will be skipped if the minimum distance is equal to positive infinity or NaN.
+    pub min_distance: f32,
+    /// Ray direction. Does not need to be normalized. The intersection test will be skipped if
+    /// the direction has length zero or contains NaNs or infinities.
+    pub direction: MPSPackedFloat3,
+    /// Maximum intersection distance from the origin along the ray direction. May be infinite.
+    /// The intersection test will be skipped if the maximum distance is less than zero, NaN, or
+    /// less than the minimum intersection distance.
+    pub max_distance: f32,
+}
+
+/// Intersection result which contains the distance from the ray origin to the intersection point,
+/// the index of the intersected primitive, and the first two barycentric coordinates of the intersection point.
+#[repr(C)]
+pub struct MPSIntersectionDistancePrimitiveIndexCoordinates {
+    /// Distance from the ray origin to the intersection point along the ray direction vector such
+    /// that `intersection = ray.origin + ray.direction * distance`.
+    /// Is negative if there is no intersection. If the intersection type is `MPSIntersectionTypeAny`,
+    /// is a positive value for a hit or a negative value for a miss.
+    pub distance: f32,
+    /// Index of the intersected primitive. Undefined if the ray does not intersect a primitive or
+    /// if the intersection type is `MPSIntersectionTypeAny`.
+    pub primitive_index: u32,
+    /// The first two barycentric coordinates `U` and `V` of the intersection point.
+    /// The third coordinate `W = 1 - U - V`. Undefined if the ray does not intersect a primitive or
+    /// if the intersection type is `MPSIntersectionTypeAny`.
+    pub coordinates: [f32; 2],
+}
diff --git a/third_party/rust/metal/src/pipeline/compute.rs b/third_party/rust/metal/src/pipeline/compute.rs
new file mode 100644
index 0000000000..138b561cb3
--- /dev/null
+++ b/third_party/rust/metal/src/pipeline/compute.rs
@@ -0,0 +1,488 @@
+// Copyright 2017 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+
+use objc::runtime::{NO, YES};
+
+#[repr(u64)]
+#[allow(non_camel_case_types)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+pub enum MTLAttributeFormat {
+    Invalid = 0,
+    UChar2 = 1,
+    UChar3 = 2,
+    UChar4 = 3,
+    Char2 = 4,
+    Char3 = 5,
+    Char4 = 6,
+    UChar2Normalized = 7,
+    UChar3Normalized = 8,
+    UChar4Normalized = 9,
+    Char2Normalized = 10,
+    Char3Normalized = 11,
+    Char4Normalized = 12,
+    UShort2 = 13,
+    UShort3 = 14,
+    UShort4 = 15,
+    Short2 = 16,
+    Short3 = 17,
+    Short4 = 18,
+    UShort2Normalized = 19,
+    UShort3Normalized = 20,
+    UShort4Normalized = 21,
+    Short2Normalized = 22,
+    Short3Normalized = 23,
+    Short4Normalized = 24,
+    Half2 = 25,
+    Half3 = 26,
+    Half4 = 27,
+    Float = 28,
+    Float2 = 29,
+    Float3 = 30,
+    Float4 = 31,
+    Int = 32,
+    Int2 = 33,
+    Int3 = 34,
+    Int4 = 35,
+    UInt = 36,
+    UInt2 = 37,
+    UInt3 = 38,
+    UInt4 = 39,
+    Int1010102Normalized = 40,
+    UInt1010102Normalized = 41,
+    UChar4Normalized_BGRA = 42,
+    UChar = 45,
+    Char = 46,
+    UCharNormalized = 47,
+    CharNormalized = 48,
+    UShort = 49,
+    Short = 50,
+    UShortNormalized = 51,
+    ShortNormalized = 52,
+    Half = 53,
+}
+
+#[repr(u64)]
+#[allow(non_camel_case_types)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+pub enum MTLStepFunction {
+    Constant = 0,
+    PerInstance = 1,
+    PerPatch = 2,
+    PerPatchControlPoint = 3,
+    PerVertex = 4,
+    ThreadPositionInGridX = 5,
+    ThreadPositionInGridXIndexed = 6,
+    ThreadPositionInGridY = 7,
+    ThreadPositionInGridYIndexed = 8,
+}
+
+pub enum MTLComputePipelineDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLComputePipelineDescriptor;
+    pub struct ComputePipelineDescriptor;
+    pub struct ComputePipelineDescriptorRef;
+}
+
+impl ComputePipelineDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLComputePipelineDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl ComputePipelineDescriptorRef {
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: nslabel];
+        }
+    }
+
+    pub fn compute_function(&self) -> Option<&FunctionRef> {
+        unsafe { msg_send![self, computeFunction] }
+    }
+
+    pub fn set_compute_function(&self, function: Option<&FunctionRef>) {
+        unsafe { msg_send![self, setComputeFunction: function] }
+    }
+
+    pub fn thread_group_size_is_multiple_of_thread_execution_width(&self) -> bool {
+        unsafe {
+            match msg_send![self, threadGroupSizeIsMultipleOfThreadExecutionWidth] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn set_thread_group_size_is_multiple_of_thread_execution_width(
+        &self,
+        size_is_multiple_of_width: bool,
+    ) {
+        unsafe {
+            msg_send![
+                self,
+                setThreadGroupSizeIsMultipleOfThreadExecutionWidth: size_is_multiple_of_width
+            ]
+        }
+    }
+
+    /// API_AVAILABLE(macos(10.14), ios(12.0));
+    pub fn max_total_threads_per_threadgroup(&self) -> NSUInteger {
+        unsafe { msg_send![self, maxTotalThreadsPerThreadgroup] }
+    }
+
+    /// API_AVAILABLE(macos(10.14), ios(12.0));
+    pub fn set_max_total_threads_per_threadgroup(&self, max_total_threads: NSUInteger) {
+        unsafe { msg_send![self, setMaxTotalThreadsPerThreadgroup: max_total_threads] }
+    }
+
+    /// API_AVAILABLE(ios(13.0),macos(11.0));
+    pub fn support_indirect_command_buffers(&self) -> bool {
+        unsafe {
+            match msg_send![self, supportIndirectCommandBuffers] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    /// API_AVAILABLE(ios(13.0),macos(11.0));
+    pub fn set_support_indirect_command_buffers(&self, support: bool) {
+        unsafe { msg_send![self, setSupportIndirectCommandBuffers: support] }
+    }
+
+    /// API_AVAILABLE(macos(11.0), ios(14.0));
+    pub fn support_adding_binary_functions(&self) -> bool {
+        unsafe {
+            match msg_send![self, supportAddingBinaryFunctions] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    /// API_AVAILABLE(macos(11.0), ios(14.0));
+    pub fn set_support_adding_binary_functions(&self, support: bool) {
+        unsafe { msg_send![self, setSupportAddingBinaryFunctions: support] }
+    }
+
+    /// API_AVAILABLE(macos(11.0), ios(14.0));
+    pub fn max_call_stack_depth(&self) -> NSUInteger {
+        unsafe { msg_send![self, maxCallStackDepth] }
+    }
+
+    /// API_AVAILABLE(macos(11.0), ios(14.0));
+    pub fn set_max_call_stack_depth(&self, depth: NSUInteger) {
+        unsafe { msg_send![self, setMaxCallStackDepth: depth] }
+    }
+
+    /// API_AVAILABLE(macos(11.0), ios(14.0));
+    /// Marshal to Rust Vec
+    pub fn insert_libraries(&self) -> Vec<DynamicLibrary> {
+        unsafe {
+            let libraries: *mut Object = msg_send![self, insertLibraries];
+            let count: NSUInteger = msg_send![libraries, count];
+            let ret = (0..count)
+                .map(|i| {
+                    let lib = msg_send![libraries, objectAtIndex: i];
+                    DynamicLibrary::from_ptr(lib)
+                })
+                .collect();
+            ret
+        }
+    }
+
+    /// Marshal from Rust slice
+    pub fn set_insert_libraries(&self, libraries: &[&DynamicLibraryRef]) {
+        let ns_array = Array::<DynamicLibrary>::from_slice(libraries);
+        unsafe { msg_send![self, setInsertLibraries: ns_array] }
+    }
+
+    /// API_AVAILABLE(macos(11.0), ios(14.0));
+    /// Marshal to Rust Vec
+    pub fn binary_archives(&self) -> Vec<BinaryArchive> {
+        unsafe {
+            let archives: *mut Object = msg_send![self, binaryArchives];
+            let count: NSUInteger = msg_send![archives, count];
+            let ret = (0..count)
+                .map(|i| {
+                    let a = msg_send![archives, objectAtIndex: i];
+                    BinaryArchive::from_ptr(a)
+                })
+                .collect();
+            ret
+        }
+    }
+
+    /// API_AVAILABLE(macos(11.0), ios(14.0));
+    /// Marshal from Rust slice
+    pub fn set_binary_archives(&self, archives: &[&BinaryArchiveRef]) {
+        let ns_array = Array::<BinaryArchive>::from_slice(archives);
+        unsafe { msg_send![self, setBinaryArchives: ns_array] }
+    }
+
+    /// API_AVAILABLE(macos(11.0), ios(14.0));
+    pub fn linked_functions(&self) -> &LinkedFunctionsRef {
+        unsafe { msg_send![self, linkedFunctions] }
+    }
+
+    /// API_AVAILABLE(macos(11.0), ios(14.0));
+    pub fn set_linked_functions(&self, functions: &LinkedFunctionsRef) {
+        unsafe { msg_send![self, setLinkedFunctions: functions] }
+    }
+
+    pub fn stage_input_descriptor(&self) -> Option<&StageInputOutputDescriptorRef> {
+        unsafe { msg_send![self, stageInputDescriptor] }
+    }
+
+    pub fn set_stage_input_descriptor(&self, descriptor: Option<&StageInputOutputDescriptorRef>) {
+        unsafe { msg_send![self, setStageInputDescriptor: descriptor] }
+    }
+
+    pub fn buffers(&self) -> Option<&PipelineBufferDescriptorArrayRef> {
+        unsafe { msg_send![self, buffers] }
+    }
+
+    pub fn reset(&self) {
+        unsafe { msg_send![self, reset] }
+    }
+}
+
+pub enum MTLComputePipelineState {}
+
+foreign_obj_type! {
+    type CType = MTLComputePipelineState;
+    pub struct ComputePipelineState;
+    pub struct ComputePipelineStateRef;
+}
+
+impl ComputePipelineStateRef {
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn max_total_threads_per_threadgroup(&self) -> NSUInteger {
+        unsafe { msg_send![self, maxTotalThreadsPerThreadgroup] }
+    }
+
+    pub fn thread_execution_width(&self) -> NSUInteger {
+        unsafe { msg_send![self, threadExecutionWidth] }
+    }
+
+    pub fn static_threadgroup_memory_length(&self) -> NSUInteger {
+        unsafe { msg_send![self, staticThreadgroupMemoryLength] }
+    }
+
+    /// Only available on (ios(11.0), macos(11.0), macCatalyst(14.0)) NOT available on (tvos)
+    pub fn imageblock_memory_length_for_dimensions(&self, dimensions: MTLSize) -> NSUInteger {
+        unsafe { msg_send![self, imageblockMemoryLengthForDimensions: dimensions] }
+    }
+
+    /// Only available on (ios(13.0), macos(11.0))
+    pub fn support_indirect_command_buffers(&self) -> bool {
+        unsafe {
+            match msg_send![self, supportIndirectCommandBuffers] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    /// Only available on (macos(11.0), ios(14.0))
+    pub fn function_handle_with_function(
+        &self,
+        function: &FunctionRef,
+    ) -> Option<&FunctionHandleRef> {
+        unsafe { msg_send![self, functionHandleWithFunction: function] }
+    }
+
+    // API_AVAILABLE(macos(11.0), ios(14.0));
+    // TODO: newComputePipelineStateWithAdditionalBinaryFunctions
+    // - (nullable id <MTLComputePipelineState>)newComputePipelineStateWithAdditionalBinaryFunctions:(nonnull NSArray<id<MTLFunction>> *)functions error:(__autoreleasing NSError **)error
+
+    // API_AVAILABLE(macos(11.0), ios(14.0));
+    // TODO: newVisibleFunctionTableWithDescriptor
+    // - (nullable id<MTLVisibleFunctionTable>)newVisibleFunctionTableWithDescriptor:(MTLVisibleFunctionTableDescriptor * __nonnull)descriptor
+    // API_AVAILABLE(macos(11.0), ios(14.0));
+    // TODO: newIntersectionFunctionTableWithDescriptor
+    // - (nullable id <MTLIntersectionFunctionTable>)newIntersectionFunctionTableWithDescriptor:(MTLIntersectionFunctionTableDescriptor * _Nonnull)descriptor
+}
+
+pub enum MTLStageInputOutputDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLStageInputOutputDescriptor;
+    pub struct StageInputOutputDescriptor;
+    pub struct StageInputOutputDescriptorRef;
+}
+
+impl StageInputOutputDescriptor {
+    pub fn new<'a>() -> &'a StageInputOutputDescriptorRef {
+        unsafe {
+            let class = class!(MTLStageInputOutputDescriptor);
+            msg_send![class, stageInputOutputDescriptor]
+        }
+    }
+}
+
+impl StageInputOutputDescriptorRef {
+    pub fn attributes(&self) -> Option<&AttributeDescriptorArrayRef> {
+        unsafe { msg_send![self, attributes] }
+    }
+
+    pub fn index_buffer_index(&self) -> NSUInteger {
+        unsafe { msg_send![self, indexBufferIndex] }
+    }
+
+    pub fn set_index_buffer_index(&self, idx_buffer_idx: NSUInteger) {
+        unsafe { msg_send![self, setIndexBufferIndex: idx_buffer_idx] }
+    }
+
+    pub fn index_type(&self) -> MTLIndexType {
+        unsafe { msg_send![self, indexType] }
+    }
+
+    pub fn set_index_type(&self, index_ty: MTLIndexType) {
+        unsafe { msg_send![self, setIndexType: index_ty] }
+    }
+
+    pub fn layouts(&self) -> Option<&BufferLayoutDescriptorArrayRef> {
+        unsafe { msg_send![self, layouts] }
+    }
+
+    pub fn reset(&self) {
+        unsafe { msg_send![self, reset] }
+    }
+}
+
+pub enum MTLAttributeDescriptorArray {}
+
+foreign_obj_type! {
+    type CType = MTLAttributeDescriptorArray;
+    pub struct AttributeDescriptorArray;
+    pub struct AttributeDescriptorArrayRef;
+}
+
+impl AttributeDescriptorArrayRef {
+    pub fn object_at(&self, index: NSUInteger) -> Option<&AttributeDescriptorRef> {
+        unsafe { msg_send![self, objectAtIndexedSubscript: index] }
+    }
+
+    pub fn set_object_at(&self, index: NSUInteger, buffer_desc: Option<&AttributeDescriptorRef>) {
+        unsafe { msg_send![self, setObject:buffer_desc atIndexedSubscript:index] }
+    }
+}
+
+pub enum MTLAttributeDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLAttributeDescriptor;
+    pub struct AttributeDescriptor;
+    pub struct AttributeDescriptorRef;
+}
+
+impl AttributeDescriptorRef {
+    pub fn buffer_index(&self) -> NSUInteger {
+        unsafe { msg_send![self, bufferIndex] }
+    }
+
+    pub fn set_buffer_index(&self, buffer_index: NSUInteger) {
+        unsafe { msg_send![self, setBufferIndex: buffer_index] }
+    }
+
+    pub fn format(&self) -> MTLAttributeFormat {
+        unsafe { msg_send![self, format] }
+    }
+
+    pub fn set_format(&self, format: MTLAttributeFormat) {
+        unsafe { msg_send![self, setFormat: format] }
+    }
+
+    pub fn offset(&self) -> NSUInteger {
+        unsafe { msg_send![self, offset] }
+    }
+
+    pub fn set_offset(&self, offset: NSUInteger) {
+        unsafe { msg_send![self, setOffset: offset] }
+    }
+}
+
+pub enum MTLBufferLayoutDescriptorArray {}
+
+foreign_obj_type! {
+    type CType = MTLBufferLayoutDescriptorArray;
+    pub struct BufferLayoutDescriptorArray;
+    pub struct BufferLayoutDescriptorArrayRef;
+}
+
+impl BufferLayoutDescriptorArrayRef {
+    pub fn object_at(&self, index: NSUInteger) -> Option<&BufferLayoutDescriptorRef> {
+        unsafe { msg_send![self, objectAtIndexedSubscript: index] }
+    }
+
+    pub fn set_object_at(
+        &self,
+        index: NSUInteger,
+        buffer_desc: Option<&BufferLayoutDescriptorRef>,
+    ) {
+        unsafe { msg_send![self, setObject:buffer_desc atIndexedSubscript:index] }
+    }
+}
+
+pub enum MTLBufferLayoutDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLBufferLayoutDescriptor;
+    pub struct BufferLayoutDescriptor;
+    pub struct BufferLayoutDescriptorRef;
+}
+
+impl BufferLayoutDescriptorRef {
+    pub fn step_function(&self) -> MTLStepFunction {
+        unsafe { msg_send![self, stepFunction] }
+    }
+
+    pub fn set_step_function(&self, step_function: MTLStepFunction) {
+        unsafe { msg_send![self, setStepFunction: step_function] }
+    }
+
+    pub fn step_rate(&self) -> NSUInteger {
+        unsafe { msg_send![self, stepRate] }
+    }
+
+    pub fn set_step_rate(&self, step_rate: NSUInteger) {
+        unsafe { msg_send![self, setStepRate: step_rate] }
+    }
+
+    pub fn stride(&self) -> NSUInteger {
+        unsafe { msg_send![self, stride] }
+    }
+
+    pub fn set_stride(&self, stride: NSUInteger) {
+        unsafe { msg_send![self, setStride: stride] }
+    }
+}
diff --git a/third_party/rust/metal/src/pipeline/mod.rs b/third_party/rust/metal/src/pipeline/mod.rs
new file mode 100644
index 0000000000..e65d28d6ca
--- /dev/null
+++ b/third_party/rust/metal/src/pipeline/mod.rs
@@ -0,0 +1,70 @@
+// Copyright 2017 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+
+mod compute;
+mod render;
+
+pub use self::compute::*;
+pub use self::render::*;
+
+#[repr(u64)]
+#[allow(non_camel_case_types)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+pub enum MTLMutability {
+    Default = 0,
+    Mutable = 1,
+    Immutable = 2,
+}
+
+impl Default for MTLMutability {
+    #[inline]
+    fn default() -> Self {
+        MTLMutability::Default
+    }
+}
+
+pub enum MTLPipelineBufferDescriptorArray {}
+
+foreign_obj_type! {
+    type CType = MTLPipelineBufferDescriptorArray;
+    pub struct PipelineBufferDescriptorArray;
+    pub struct PipelineBufferDescriptorArrayRef;
+}
+
+impl PipelineBufferDescriptorArrayRef {
+    pub fn object_at(&self, index: NSUInteger) -> Option<&PipelineBufferDescriptorRef> {
+        unsafe { msg_send![self, objectAtIndexedSubscript: index] }
+    }
+
+    pub fn set_object_at(
+        &self,
+        index: NSUInteger,
+        buffer_desc: Option<&PipelineBufferDescriptorRef>,
+    ) {
+        unsafe { msg_send![self, setObject:buffer_desc atIndexedSubscript:index] }
+    }
+}
+
+pub enum MTLPipelineBufferDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLPipelineBufferDescriptor;
+    pub struct PipelineBufferDescriptor;
+    pub struct PipelineBufferDescriptorRef;
+}
+
+impl PipelineBufferDescriptorRef {
+    pub fn mutability(&self) -> MTLMutability {
+        unsafe { msg_send![self, mutability] }
+    }
+
+    pub fn set_mutability(&self, new_mutability: MTLMutability) {
+        unsafe { msg_send![self, setMutability: new_mutability] }
+    }
+}
diff --git a/third_party/rust/metal/src/pipeline/render.rs b/third_party/rust/metal/src/pipeline/render.rs
new file mode 100644
index 0000000000..a4b3a629e1
--- /dev/null
+++ b/third_party/rust/metal/src/pipeline/render.rs
@@ -0,0 +1,510 @@
+// Copyright 2017 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+
+use objc::runtime::{NO, YES};
+
+#[repr(u64)]
+#[allow(non_camel_case_types)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+pub enum MTLBlendFactor {
+    Zero = 0,
+    One = 1,
+    SourceColor = 2,
+    OneMinusSourceColor = 3,
+    SourceAlpha = 4,
+    OneMinusSourceAlpha = 5,
+    DestinationColor = 6,
+    OneMinusDestinationColor = 7,
+    DestinationAlpha = 8,
+    OneMinusDestinationAlpha = 9,
+    SourceAlphaSaturated = 10,
+    BlendColor = 11,
+    OneMinusBlendColor = 12,
+    BlendAlpha = 13,
+    OneMinusBlendAlpha = 14,
+    Source1Color = 15,
+    OneMinusSource1Color = 16,
+    Source1Alpha = 17,
+    OneMinusSource1Alpha = 18,
+}
+
+#[repr(u64)]
+#[allow(non_camel_case_types)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+pub enum MTLBlendOperation {
+    Add = 0,
+    Subtract = 1,
+    ReverseSubtract = 2,
+    Min = 3,
+    Max = 4,
+}
+
+bitflags! {
+    pub struct MTLColorWriteMask: NSUInteger {
+        const None  = 0;
+        const Red   = 0x1 << 3;
+        const Green = 0x1 << 2;
+        const Blue  = 0x1 << 1;
+        const Alpha = 0x1 << 0;
+        const All   = 0xf;
+    }
+}
+
+#[repr(u64)]
+#[allow(non_camel_case_types)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+pub enum MTLPrimitiveTopologyClass {
+    Unspecified = 0,
+    Point = 1,
+    Line = 2,
+    Triangle = 3,
+}
+
+// TODO: MTLTessellationPartitionMode
+// TODO: MTLTessellationFactorStepFunction
+// TODO: MTLTessellationFactorFormat
+// TODO: MTLTessellationControlPointIndexType
+
+pub enum MTLRenderPipelineColorAttachmentDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLRenderPipelineColorAttachmentDescriptor;
+    pub struct RenderPipelineColorAttachmentDescriptor;
+    pub struct RenderPipelineColorAttachmentDescriptorRef;
+}
+
+impl RenderPipelineColorAttachmentDescriptorRef {
+    pub fn pixel_format(&self) -> MTLPixelFormat {
+        unsafe { msg_send![self, pixelFormat] }
+    }
+
+    pub fn set_pixel_format(&self, pixel_format: MTLPixelFormat) {
+        unsafe { msg_send![self, setPixelFormat: pixel_format] }
+    }
+
+    pub fn is_blending_enabled(&self) -> bool {
+        unsafe {
+            match msg_send![self, isBlendingEnabled] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn set_blending_enabled(&self, enabled: bool) {
+        unsafe { msg_send![self, setBlendingEnabled: enabled] }
+    }
+
+    pub fn source_rgb_blend_factor(&self) -> MTLBlendFactor {
+        unsafe { msg_send![self, sourceRGBBlendFactor] }
+    }
+
+    pub fn set_source_rgb_blend_factor(&self, blend_factor: MTLBlendFactor) {
+        unsafe { msg_send![self, setSourceRGBBlendFactor: blend_factor] }
+    }
+
+    pub fn destination_rgb_blend_factor(&self) -> MTLBlendFactor {
+        unsafe { msg_send![self, destinationRGBBlendFactor] }
+    }
+
+    pub fn set_destination_rgb_blend_factor(&self, blend_factor: MTLBlendFactor) {
+        unsafe { msg_send![self, setDestinationRGBBlendFactor: blend_factor] }
+    }
+
+    pub fn rgb_blend_operation(&self) -> MTLBlendOperation {
+        unsafe { msg_send![self, rgbBlendOperation] }
+    }
+
+    pub fn set_rgb_blend_operation(&self, blend_operation: MTLBlendOperation) {
+        unsafe { msg_send![self, setRgbBlendOperation: blend_operation] }
+    }
+
+    pub fn source_alpha_blend_factor(&self) -> MTLBlendFactor {
+        unsafe { msg_send![self, sourceAlphaBlendFactor] }
+    }
+
+    pub fn set_source_alpha_blend_factor(&self, blend_factor: MTLBlendFactor) {
+        unsafe { msg_send![self, setSourceAlphaBlendFactor: blend_factor] }
+    }
+
+    pub fn destination_alpha_blend_factor(&self) -> MTLBlendFactor {
+        unsafe { msg_send![self, destinationAlphaBlendFactor] }
+    }
+
+    pub fn set_destination_alpha_blend_factor(&self, blend_factor: MTLBlendFactor) {
+        unsafe { msg_send![self, setDestinationAlphaBlendFactor: blend_factor] }
+    }
+
+    pub fn alpha_blend_operation(&self) -> MTLBlendOperation {
+        unsafe { msg_send![self, alphaBlendOperation] }
+    }
+
+    pub fn set_alpha_blend_operation(&self, blend_operation: MTLBlendOperation) {
+        unsafe { msg_send![self, setAlphaBlendOperation: blend_operation] }
+    }
+
+    pub fn write_mask(&self) -> MTLColorWriteMask {
+        unsafe { msg_send![self, writeMask] }
+    }
+
+    pub fn set_write_mask(&self, mask: MTLColorWriteMask) {
+        unsafe { msg_send![self, setWriteMask: mask] }
+    }
+}
+
+pub enum MTLRenderPipelineReflection {}
+
+foreign_obj_type! {
+    type CType = MTLRenderPipelineReflection;
+    pub struct RenderPipelineReflection;
+    pub struct RenderPipelineReflectionRef;
+}
+
+impl RenderPipelineReflection {
+    #[cfg(feature = "private")]
+    pub unsafe fn new(
+        vertex_data: *mut std::ffi::c_void,
+        fragment_data: *mut std::ffi::c_void,
+        vertex_desc: *mut std::ffi::c_void,
+        device: &DeviceRef,
+        options: u64,
+        flags: u64,
+    ) -> Self {
+        let class = class!(MTLRenderPipelineReflection);
+        let this: RenderPipelineReflection = msg_send![class, alloc];
+        let this_alias: *mut Object = msg_send![this.as_ref(), initWithVertexData:vertex_data
+                                                                fragmentData:fragment_data
+                                                serializedVertexDescriptor:vertex_desc
+                                                                    device:device
+                                                                    options:options
+                                                                        flags:flags];
+        if this_alias.is_null() {
+            panic!("[MTLRenderPipelineReflection init] failed");
+        }
+        this
+    }
+}
+
+impl RenderPipelineReflectionRef {
+    /// An array of objects that describe the arguments of a fragment function.
+    pub fn fragment_arguments(&self) -> &ArgumentArrayRef {
+        unsafe { msg_send![self, fragmentArguments] }
+    }
+
+    /// An array of objects that describe the arguments of a vertex function.
+    pub fn vertex_arguments(&self) -> &ArgumentArrayRef {
+        unsafe { msg_send![self, vertexArguments] }
+    }
+
+    /// An array of objects that describe the arguments of a tile shading function.
+    pub fn tile_arguments(&self) -> &ArgumentArrayRef {
+        unsafe { msg_send![self, tileArguments] }
+    }
+}
+
+pub enum MTLArgumentArray {}
+
+foreign_obj_type! {
+    type CType = MTLArgumentArray;
+    pub struct ArgumentArray;
+    pub struct ArgumentArrayRef;
+}
+
+impl ArgumentArrayRef {
+    pub fn object_at(&self, index: NSUInteger) -> Option<&ArgumentRef> {
+        unsafe { msg_send![self, objectAtIndexedSubscript: index] }
+    }
+
+    pub fn count(&self) -> NSUInteger {
+        unsafe { msg_send![self, count] }
+    }
+}
+
+pub enum MTLComputePipelineReflection {}
+
+foreign_obj_type! {
+    type CType = MTLComputePipelineReflection;
+    pub struct ComputePipelineReflection;
+    pub struct ComputePipelineReflectionRef;
+}
+
+impl ComputePipelineReflectionRef {
+    /// An array of objects that describe the arguments of a compute function.
+    pub fn arguments(&self) -> &ArgumentArrayRef {
+        unsafe { msg_send![self, arguments] }
+    }
+}
+
+pub enum MTLRenderPipelineDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLRenderPipelineDescriptor;
+    pub struct RenderPipelineDescriptor;
+    pub struct RenderPipelineDescriptorRef;
+}
+
+impl RenderPipelineDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLRenderPipelineDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl RenderPipelineDescriptorRef {
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: nslabel];
+        }
+    }
+
+    pub fn vertex_function(&self) -> Option<&FunctionRef> {
+        unsafe { msg_send![self, vertexFunction] }
+    }
+
+    pub fn set_vertex_function(&self, function: Option<&FunctionRef>) {
+        unsafe { msg_send![self, setVertexFunction: function] }
+    }
+
+    pub fn fragment_function(&self) -> Option<&FunctionRef> {
+        unsafe { msg_send![self, fragmentFunction] }
+    }
+
+    pub fn set_fragment_function(&self, function: Option<&FunctionRef>) {
+        unsafe { msg_send![self, setFragmentFunction: function] }
+    }
+
+    pub fn vertex_descriptor(&self) -> Option<&VertexDescriptorRef> {
+        unsafe { msg_send![self, vertexDescriptor] }
+    }
+
+    pub fn set_vertex_descriptor(&self, descriptor: Option<&VertexDescriptorRef>) {
+        unsafe { msg_send![self, setVertexDescriptor: descriptor] }
+    }
+
+    /// DEPRECATED - aliases rasterSampleCount property
+    pub fn sample_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, sampleCount] }
+    }
+
+    /// DEPRECATED - aliases rasterSampleCount property
+    pub fn set_sample_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setSampleCount: count] }
+    }
+
+    pub fn raster_sample_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, rasterSampleCount] }
+    }
+
+    pub fn set_raster_sample_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setRasterSampleCount: count] }
+    }
+
+    pub fn max_vertex_amplification_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, maxVertexAmplificationCount] }
+    }
+
+    pub fn set_max_vertex_amplification_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setMaxVertexAmplificationCount: count] }
+    }
+
+    pub fn is_alpha_to_coverage_enabled(&self) -> bool {
+        unsafe {
+            match msg_send![self, isAlphaToCoverageEnabled] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn set_alpha_to_coverage_enabled(&self, enabled: bool) {
+        unsafe { msg_send![self, setAlphaToCoverageEnabled: enabled] }
+    }
+
+    pub fn is_alpha_to_one_enabled(&self) -> bool {
+        unsafe {
+            match msg_send![self, isAlphaToOneEnabled] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn set_alpha_to_one_enabled(&self, enabled: bool) {
+        unsafe { msg_send![self, setAlphaToOneEnabled: enabled] }
+    }
+
+    pub fn is_rasterization_enabled(&self) -> bool {
+        unsafe {
+            match msg_send![self, isRasterizationEnabled] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn set_rasterization_enabled(&self, enabled: bool) {
+        unsafe { msg_send![self, setRasterizationEnabled: enabled] }
+    }
+
+    pub fn color_attachments(&self) -> &RenderPipelineColorAttachmentDescriptorArrayRef {
+        unsafe { msg_send![self, colorAttachments] }
+    }
+
+    pub fn depth_attachment_pixel_format(&self) -> MTLPixelFormat {
+        unsafe { msg_send![self, depthAttachmentPixelFormat] }
+    }
+
+    pub fn set_depth_attachment_pixel_format(&self, pixel_format: MTLPixelFormat) {
+        unsafe { msg_send![self, setDepthAttachmentPixelFormat: pixel_format] }
+    }
+
+    pub fn stencil_attachment_pixel_format(&self) -> MTLPixelFormat {
+        unsafe { msg_send![self, stencilAttachmentPixelFormat] }
+    }
+
+    pub fn set_stencil_attachment_pixel_format(&self, pixel_format: MTLPixelFormat) {
+        unsafe { msg_send![self, setStencilAttachmentPixelFormat: pixel_format] }
+    }
+
+    pub fn input_primitive_topology(&self) -> MTLPrimitiveTopologyClass {
+        unsafe { msg_send![self, inputPrimitiveTopology] }
+    }
+
+    pub fn set_input_primitive_topology(&self, topology: MTLPrimitiveTopologyClass) {
+        unsafe { msg_send![self, setInputPrimitiveTopology: topology] }
+    }
+
+    #[cfg(feature = "private")]
+    pub unsafe fn serialize_vertex_data(&self) -> *mut std::ffi::c_void {
+        use std::ptr;
+        let flags = 0;
+        let err: *mut Object = ptr::null_mut();
+        msg_send![self, newSerializedVertexDataWithFlags:flags
+                                                    error:err]
+    }
+
+    #[cfg(feature = "private")]
+    pub unsafe fn serialize_fragment_data(&self) -> *mut std::ffi::c_void {
+        msg_send![self, serializeFragmentData]
+    }
+
+    pub fn support_indirect_command_buffers(&self) -> bool {
+        unsafe {
+            match msg_send![self, supportIndirectCommandBuffers] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn set_support_indirect_command_buffers(&self, support: bool) {
+        unsafe { msg_send![self, setSupportIndirectCommandBuffers: support] }
+    }
+
+    pub fn vertex_buffers(&self) -> Option<&PipelineBufferDescriptorArrayRef> {
+        unsafe { msg_send![self, vertexBuffers] }
+    }
+
+    pub fn fragment_buffers(&self) -> Option<&PipelineBufferDescriptorArrayRef> {
+        unsafe { msg_send![self, fragmentBuffers] }
+    }
+
+    // TODO: tesselation stuff
+
+    /// API_AVAILABLE(macos(11.0), ios(14.0));
+    /// Marshal to Rust Vec
+    pub fn binary_archives(&self) -> Vec<BinaryArchive> {
+        unsafe {
+            let archives: *mut Object = msg_send![self, binaryArchives];
+            let count: NSUInteger = msg_send![archives, count];
+            let ret = (0..count)
+                .map(|i| {
+                    let a = msg_send![archives, objectAtIndex: i];
+                    BinaryArchive::from_ptr(a)
+                })
+                .collect();
+            ret
+        }
+    }
+
+    /// API_AVAILABLE(macos(11.0), ios(14.0));
+    /// Marshal from Rust slice
+    pub fn set_binary_archives(&self, archives: &[&BinaryArchiveRef]) {
+        let ns_array = Array::<BinaryArchive>::from_slice(archives);
+        unsafe { msg_send![self, setBinaryArchives: ns_array] }
+    }
+
+    pub fn reset(&self) {
+        unsafe { msg_send![self, reset] }
+    }
+}
+
+pub enum MTLRenderPipelineState {}
+
+foreign_obj_type! {
+    type CType = MTLRenderPipelineState;
+    pub struct RenderPipelineState;
+    pub struct RenderPipelineStateRef;
+}
+
+impl RenderPipelineStateRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+}
+
+pub enum MTLRenderPipelineColorAttachmentDescriptorArray {}
+
+foreign_obj_type! {
+    type CType = MTLRenderPipelineColorAttachmentDescriptorArray;
+    pub struct RenderPipelineColorAttachmentDescriptorArray;
+    pub struct RenderPipelineColorAttachmentDescriptorArrayRef;
+}
+
+impl RenderPipelineColorAttachmentDescriptorArrayRef {
+    pub fn object_at(
+        &self,
+        index: NSUInteger,
+    ) -> Option<&RenderPipelineColorAttachmentDescriptorRef> {
+        unsafe { msg_send![self, objectAtIndexedSubscript: index] }
+    }
+
+    pub fn set_object_at(
+        &self,
+        index: NSUInteger,
+        attachment: Option<&RenderPipelineColorAttachmentDescriptorRef>,
+    ) {
+        unsafe {
+            msg_send![self, setObject:attachment
+                   atIndexedSubscript:index]
+        }
+    }
+}
diff --git a/third_party/rust/metal/src/renderpass.rs b/third_party/rust/metal/src/renderpass.rs
new file mode 100644
index 0000000000..ed4f60a43d
--- /dev/null
+++ b/third_party/rust/metal/src/renderpass.rs
@@ -0,0 +1,330 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+
+#[repr(u64)]
+#[derive(Copy, Clone, Debug)]
+pub enum MTLLoadAction {
+    DontCare = 0,
+    Load = 1,
+    Clear = 2,
+}
+
+#[repr(u64)]
+#[derive(Copy, Clone, Debug)]
+pub enum MTLStoreAction {
+    DontCare = 0,
+    Store = 1,
+    MultisampleResolve = 2,
+    StoreAndMultisampleResolve = 3,
+    Unknown = 4,
+    CustomSampleDepthStore = 5,
+}
+
+#[repr(C)]
+#[derive(Copy, Clone, Debug)]
+pub struct MTLClearColor {
+    pub red: f64,
+    pub green: f64,
+    pub blue: f64,
+    pub alpha: f64,
+}
+
+impl MTLClearColor {
+    #[inline]
+    pub fn new(red: f64, green: f64, blue: f64, alpha: f64) -> Self {
+        Self {
+            red,
+            green,
+            blue,
+            alpha,
+        }
+    }
+}
+
+#[repr(u32)]
+#[allow(non_camel_case_types)]
+pub enum MTLMultisampleStencilResolveFilter {
+    Sample0 = 0,
+    DepthResolvedSample = 1,
+}
+
+pub enum MTLRenderPassAttachmentDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLRenderPassAttachmentDescriptor;
+    pub struct RenderPassAttachmentDescriptor;
+    pub struct RenderPassAttachmentDescriptorRef;
+}
+
+impl RenderPassAttachmentDescriptorRef {
+    pub fn texture(&self) -> Option<&TextureRef> {
+        unsafe { msg_send![self, texture] }
+    }
+
+    pub fn set_texture(&self, texture: Option<&TextureRef>) {
+        unsafe { msg_send![self, setTexture: texture] }
+    }
+
+    pub fn level(&self) -> NSUInteger {
+        unsafe { msg_send![self, level] }
+    }
+
+    pub fn set_level(&self, level: NSUInteger) {
+        unsafe { msg_send![self, setLevel: level] }
+    }
+
+    pub fn slice(&self) -> NSUInteger {
+        unsafe { msg_send![self, slice] }
+    }
+
+    pub fn set_slice(&self, slice: NSUInteger) {
+        unsafe { msg_send![self, setSlice: slice] }
+    }
+
+    pub fn depth_plane(&self) -> NSUInteger {
+        unsafe { msg_send![self, depthPlane] }
+    }
+
+    pub fn set_depth_plane(&self, depth_plane: NSUInteger) {
+        unsafe { msg_send![self, setDepthPlane: depth_plane] }
+    }
+
+    pub fn resolve_texture(&self) -> Option<&TextureRef> {
+        unsafe { msg_send![self, resolveTexture] }
+    }
+
+    pub fn set_resolve_texture(&self, resolve_texture: Option<&TextureRef>) {
+        unsafe { msg_send![self, setResolveTexture: resolve_texture] }
+    }
+
+    pub fn resolve_level(&self) -> NSUInteger {
+        unsafe { msg_send![self, resolveLevel] }
+    }
+
+    pub fn set_resolve_level(&self, resolve_level: NSUInteger) {
+        unsafe { msg_send![self, setResolveLevel: resolve_level] }
+    }
+
+    pub fn resolve_slice(&self) -> NSUInteger {
+        unsafe { msg_send![self, resolveSlice] }
+    }
+
+    pub fn set_resolve_slice(&self, resolve_slice: NSUInteger) {
+        unsafe { msg_send![self, setResolveSlice: resolve_slice] }
+    }
+
+    pub fn resolve_depth_plane(&self) -> NSUInteger {
+        unsafe { msg_send![self, resolveDepthPlane] }
+    }
+
+    pub fn set_resolve_depth_plane(&self, resolve_depth_plane: NSUInteger) {
+        unsafe { msg_send![self, setResolveDepthPlane: resolve_depth_plane] }
+    }
+
+    pub fn load_action(&self) -> MTLLoadAction {
+        unsafe { msg_send![self, loadAction] }
+    }
+
+    pub fn set_load_action(&self, load_action: MTLLoadAction) {
+        unsafe { msg_send![self, setLoadAction: load_action] }
+    }
+
+    pub fn store_action(&self) -> MTLStoreAction {
+        unsafe { msg_send![self, storeAction] }
+    }
+
+    pub fn set_store_action(&self, store_action: MTLStoreAction) {
+        unsafe { msg_send![self, setStoreAction: store_action] }
+    }
+}
+
+pub enum MTLRenderPassColorAttachmentDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLRenderPassColorAttachmentDescriptor;
+    pub struct RenderPassColorAttachmentDescriptor;
+    pub struct RenderPassColorAttachmentDescriptorRef;
+    type ParentType = RenderPassAttachmentDescriptorRef;
+}
+
+impl RenderPassColorAttachmentDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLRenderPassColorAttachmentDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl RenderPassColorAttachmentDescriptorRef {
+    pub fn clear_color(&self) -> MTLClearColor {
+        unsafe { msg_send![self, clearColor] }
+    }
+
+    pub fn set_clear_color(&self, clear_color: MTLClearColor) {
+        unsafe { msg_send![self, setClearColor: clear_color] }
+    }
+}
+
+pub enum MTLRenderPassDepthAttachmentDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLRenderPassDepthAttachmentDescriptor;
+    pub struct RenderPassDepthAttachmentDescriptor;
+    pub struct RenderPassDepthAttachmentDescriptorRef;
+    type ParentType = RenderPassAttachmentDescriptorRef;
+}
+
+impl RenderPassDepthAttachmentDescriptorRef {
+    pub fn clear_depth(&self) -> f64 {
+        unsafe { msg_send![self, clearDepth] }
+    }
+
+    pub fn set_clear_depth(&self, clear_depth: f64) {
+        unsafe { msg_send![self, setClearDepth: clear_depth] }
+    }
+}
+
+pub enum MTLRenderPassStencilAttachmentDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLRenderPassStencilAttachmentDescriptor;
+    pub struct RenderPassStencilAttachmentDescriptor;
+    pub struct RenderPassStencilAttachmentDescriptorRef;
+    type ParentType = RenderPassAttachmentDescriptorRef;
+}
+
+impl RenderPassStencilAttachmentDescriptorRef {
+    pub fn clear_stencil(&self) -> u32 {
+        unsafe { msg_send![self, clearStencil] }
+    }
+
+    pub fn set_clear_stencil(&self, clear_stencil: u32) {
+        unsafe { msg_send![self, setClearStencil: clear_stencil] }
+    }
+
+    pub fn stencil_resolve_filter(&self) -> MTLMultisampleStencilResolveFilter {
+        unsafe { msg_send![self, stencilResolveFilter] }
+    }
+
+    pub fn set_stencil_resolve_filter(
+        &self,
+        stencil_resolve_filter: MTLMultisampleStencilResolveFilter,
+    ) {
+        unsafe { msg_send![self, setStencilResolveFilter: stencil_resolve_filter] }
+    }
+}
+
+pub enum MTLRenderPassColorAttachmentDescriptorArray {}
+
+foreign_obj_type! {
+    type CType = MTLRenderPassColorAttachmentDescriptorArray;
+    pub struct RenderPassColorAttachmentDescriptorArray;
+    pub struct RenderPassColorAttachmentDescriptorArrayRef;
+}
+
+impl RenderPassColorAttachmentDescriptorArrayRef {
+    pub fn object_at(&self, index: NSUInteger) -> Option<&RenderPassColorAttachmentDescriptorRef> {
+        unsafe { msg_send![self, objectAtIndexedSubscript: index] }
+    }
+
+    pub fn set_object_at(
+        &self,
+        index: NSUInteger,
+        attachment: Option<&RenderPassColorAttachmentDescriptorRef>,
+    ) {
+        unsafe {
+            msg_send![self, setObject:attachment
+                     atIndexedSubscript:index]
+        }
+    }
+}
+
+pub enum MTLRenderPassDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLRenderPassDescriptor;
+    pub struct RenderPassDescriptor;
+    pub struct RenderPassDescriptorRef;
+}
+
+impl RenderPassDescriptor {
+    /// Creates a default render pass descriptor with no attachments.
+    pub fn new<'a>() -> &'a RenderPassDescriptorRef {
+        unsafe { msg_send![class!(MTLRenderPassDescriptor), renderPassDescriptor] }
+    }
+}
+
+impl RenderPassDescriptorRef {
+    pub fn color_attachments(&self) -> &RenderPassColorAttachmentDescriptorArrayRef {
+        unsafe { msg_send![self, colorAttachments] }
+    }
+
+    pub fn depth_attachment(&self) -> Option<&RenderPassDepthAttachmentDescriptorRef> {
+        unsafe { msg_send![self, depthAttachment] }
+    }
+
+    pub fn set_depth_attachment(
+        &self,
+        depth_attachment: Option<&RenderPassDepthAttachmentDescriptorRef>,
+    ) {
+        unsafe { msg_send![self, setDepthAttachment: depth_attachment] }
+    }
+
+    pub fn stencil_attachment(&self) -> Option<&RenderPassStencilAttachmentDescriptorRef> {
+        unsafe { msg_send![self, stencilAttachment] }
+    }
+
+    pub fn set_stencil_attachment(
+        &self,
+        stencil_attachment: Option<&RenderPassStencilAttachmentDescriptorRef>,
+    ) {
+        unsafe { msg_send![self, setStencilAttachment: stencil_attachment] }
+    }
+
+    pub fn visibility_result_buffer(&self) -> Option<&BufferRef> {
+        unsafe { msg_send![self, visibilityResultBuffer] }
+    }
+
+    pub fn set_visibility_result_buffer(&self, buffer: Option<&BufferRef>) {
+        unsafe { msg_send![self, setVisibilityResultBuffer: buffer] }
+    }
+
+    pub fn render_target_array_length(&self) -> NSUInteger {
+        unsafe { msg_send![self, renderTargetArrayLength] }
+    }
+
+    pub fn set_render_target_array_length(&self, length: NSUInteger) {
+        unsafe { msg_send![self, setRenderTargetArrayLength: length] }
+    }
+
+    pub fn render_target_width(&self) -> NSUInteger {
+        unsafe { msg_send![self, renderTargetWidth] }
+    }
+
+    pub fn set_render_target_width(&self, size: NSUInteger) {
+        unsafe { msg_send![self, setRenderTargetWidth: size] }
+    }
+
+    pub fn render_target_height(&self) -> NSUInteger {
+        unsafe { msg_send![self, renderTargetHeight] }
+    }
+
+    pub fn set_render_target_height(&self, size: NSUInteger) {
+        unsafe { msg_send![self, setRenderTargetHeight: size] }
+    }
+
+    pub fn default_raster_sample_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, defaultRasterSampleCount] }
+    }
+
+    pub fn set_default_raster_sample_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setDefaultRasterSampleCount: count] }
+    }
+}
diff --git a/third_party/rust/metal/src/resource.rs b/third_party/rust/metal/src/resource.rs
new file mode 100644
index 0000000000..8986a9c838
--- /dev/null
+++ b/third_party/rust/metal/src/resource.rs
@@ -0,0 +1,176 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::{DeviceRef, HeapRef, NSUInteger};
+use objc::runtime::{NO, YES};
+
+#[repr(u64)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+pub enum MTLPurgeableState {
+    KeepCurrent = 1,
+    NonVolatile = 2,
+    Volatile = 3,
+    Empty = 4,
+}
+
+#[repr(u64)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+pub enum MTLCPUCacheMode {
+    DefaultCache = 0,
+    WriteCombined = 1,
+}
+
+#[repr(u64)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+pub enum MTLStorageMode {
+    Shared = 0,
+    Managed = 1,
+    Private = 2,
+    /// Only available on macos(11.0), macCatalyst(14.0), ios(10.0)
+    Memoryless = 3,
+}
+
+/// Only available on macos(10.15), ios(13.0)
+#[repr(u64)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+pub enum MTLHazardTrackingMode {
+    Default = 0,
+    Untracked = 1,
+    Tracked = 2,
+}
+
+pub const MTLResourceCPUCacheModeShift: NSUInteger = 0;
+pub const MTLResourceCPUCacheModeMask: NSUInteger = 0xf << MTLResourceCPUCacheModeShift;
+pub const MTLResourceStorageModeShift: NSUInteger = 4;
+pub const MTLResourceStorageModeMask: NSUInteger = 0xf << MTLResourceStorageModeShift;
+pub const MTLResourceHazardTrackingModeShift: NSUInteger = 8;
+pub const MTLResourceHazardTrackingModeMask: NSUInteger = 0x3 << MTLResourceHazardTrackingModeShift;
+
+bitflags! {
+    #[allow(non_upper_case_globals)]
+    pub struct MTLResourceOptions: NSUInteger {
+        const CPUCacheModeDefaultCache  = (MTLCPUCacheMode::DefaultCache as NSUInteger) << MTLResourceCPUCacheModeShift;
+        const CPUCacheModeWriteCombined = (MTLCPUCacheMode::WriteCombined as NSUInteger) << MTLResourceCPUCacheModeShift;
+
+        const StorageModeShared  = (MTLStorageMode::Shared as NSUInteger)  << MTLResourceStorageModeShift;
+        const StorageModeManaged = (MTLStorageMode::Managed as NSUInteger) << MTLResourceStorageModeShift;
+        const StorageModePrivate = (MTLStorageMode::Private as NSUInteger) << MTLResourceStorageModeShift;
+        const StorageModeMemoryless = (MTLStorageMode::Memoryless as NSUInteger) << MTLResourceStorageModeShift;
+
+        /// Only available on macos(10.13), ios(10.0)
+        const HazardTrackingModeDefault = (MTLHazardTrackingMode::Default as NSUInteger) << MTLResourceHazardTrackingModeShift;
+        /// Only available on macos(10.13), ios(10.0)
+        const HazardTrackingModeUntracked = (MTLHazardTrackingMode::Untracked as NSUInteger) << MTLResourceHazardTrackingModeShift;
+        /// Only available on macos(10.15), ios(13.0)
+        const HazardTrackingModeTracked = (MTLHazardTrackingMode::Tracked as NSUInteger) << MTLResourceHazardTrackingModeShift;
+    }
+}
+
+bitflags! {
+    /// Options that describe how a graphics or compute function uses an argument buffer’s resource.
+    ///
+    /// Enabling certain options for certain resources determines whether the Metal driver should
+    /// convert the resource to another format (for example, whether to decompress a color render target).
+    pub struct MTLResourceUsage: NSUInteger {
+        /// An option that enables reading from the resource.
+        const Read   = 1 << 0;
+        /// An option that enables writing to the resource.
+        const Write  = 1 << 1;
+        /// An option that enables sampling from the resource.
+        ///
+        /// Specify this option only if the resource is a texture.
+        const Sample = 1 << 2;
+    }
+}
+
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+#[repr(C)]
+pub struct MTLSizeAndAlign {
+    pub size: NSUInteger,
+    pub align: NSUInteger,
+}
+
+pub enum MTLResource {}
+
+foreign_obj_type! {
+    type CType = MTLResource;
+    pub struct Resource;
+    pub struct ResourceRef;
+}
+
+impl ResourceRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: nslabel];
+        }
+    }
+
+    pub fn cpu_cache_mode(&self) -> MTLCPUCacheMode {
+        unsafe { msg_send![self, cpuCacheMode] }
+    }
+
+    pub fn storage_mode(&self) -> MTLStorageMode {
+        unsafe { msg_send![self, storageMode] }
+    }
+
+    pub fn set_purgeable_state(&self, state: MTLPurgeableState) -> MTLPurgeableState {
+        unsafe { msg_send![self, setPurgeableState: state] }
+    }
+
+    /// Only available on macOS 10.13+ & iOS 10.11+
+    pub fn allocated_size(&self) -> NSUInteger {
+        unsafe { msg_send![self, allocatedSize] }
+    }
+
+    /// Only available on macos(10.15), ios(13.0)
+    pub fn hazard_tracking_mode(&self) -> MTLHazardTrackingMode {
+        unsafe { msg_send![self, hazardTrackingMode] }
+    }
+
+    /// Only available on macos(10.15), ios(13.0)
+    pub fn resource_options(&self) -> MTLResourceOptions {
+        unsafe { msg_send![self, resourceOptions] }
+    }
+
+    /// Only available on macos(10.13), ios(10.0)
+    pub fn heap(&self) -> &HeapRef {
+        unsafe { msg_send![self, heap] }
+    }
+
+    /// Only available on macos(10.15), ios(13.0)
+    pub fn heap_offset(&self) -> NSUInteger {
+        unsafe { msg_send![self, heapOffset] }
+    }
+
+    /// Only available on macos(10.13), ios(10.0)
+    pub fn make_aliasable(&self) {
+        unsafe { msg_send![self, makeAliasable] }
+    }
+
+    /// Only available on macos(10.13), ios(10.0)
+    pub fn is_aliasable(&self) -> bool {
+        unsafe {
+            match msg_send![self, isAliasable] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+}
diff --git a/third_party/rust/metal/src/sampler.rs b/third_party/rust/metal/src/sampler.rs
new file mode 100644
index 0000000000..3dd871a3b4
--- /dev/null
+++ b/third_party/rust/metal/src/sampler.rs
@@ -0,0 +1,157 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::{depthstencil::MTLCompareFunction, DeviceRef, NSUInteger};
+
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLSamplerMinMagFilter {
+    Nearest = 0,
+    Linear = 1,
+}
+
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLSamplerMipFilter {
+    NotMipmapped = 0,
+    Nearest = 1,
+    Linear = 2,
+}
+
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLSamplerAddressMode {
+    ClampToEdge = 0,
+    MirrorClampToEdge = 1,
+    Repeat = 2,
+    MirrorRepeat = 3,
+    ClampToZero = 4,
+    ClampToBorderColor = 5,
+}
+
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLSamplerBorderColor {
+    TransparentBlack = 0,
+    OpaqueBlack = 1,
+    OpaqueWhite = 2,
+}
+
+pub enum MTLSamplerDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLSamplerDescriptor;
+    pub struct SamplerDescriptor;
+    pub struct SamplerDescriptorRef;
+}
+
+impl SamplerDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLSamplerDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl SamplerDescriptorRef {
+    pub fn set_min_filter(&self, filter: MTLSamplerMinMagFilter) {
+        unsafe { msg_send![self, setMinFilter: filter] }
+    }
+
+    pub fn set_mag_filter(&self, filter: MTLSamplerMinMagFilter) {
+        unsafe { msg_send![self, setMagFilter: filter] }
+    }
+
+    pub fn set_mip_filter(&self, filter: MTLSamplerMipFilter) {
+        unsafe { msg_send![self, setMipFilter: filter] }
+    }
+
+    pub fn set_address_mode_s(&self, mode: MTLSamplerAddressMode) {
+        unsafe { msg_send![self, setSAddressMode: mode] }
+    }
+
+    pub fn set_address_mode_t(&self, mode: MTLSamplerAddressMode) {
+        unsafe { msg_send![self, setTAddressMode: mode] }
+    }
+
+    pub fn set_address_mode_r(&self, mode: MTLSamplerAddressMode) {
+        unsafe { msg_send![self, setRAddressMode: mode] }
+    }
+
+    pub fn set_max_anisotropy(&self, anisotropy: NSUInteger) {
+        unsafe { msg_send![self, setMaxAnisotropy: anisotropy] }
+    }
+
+    pub fn set_compare_function(&self, func: MTLCompareFunction) {
+        unsafe { msg_send![self, setCompareFunction: func] }
+    }
+
+    #[cfg(feature = "private")]
+    pub unsafe fn set_lod_bias(&self, bias: f32) {
+        msg_send![self, setLodBias: bias]
+    }
+
+    pub fn set_lod_min_clamp(&self, clamp: f32) {
+        unsafe { msg_send![self, setLodMinClamp: clamp] }
+    }
+
+    pub fn set_lod_max_clamp(&self, clamp: f32) {
+        unsafe { msg_send![self, setLodMaxClamp: clamp] }
+    }
+
+    pub fn set_lod_average(&self, enable: bool) {
+        unsafe { msg_send![self, setLodAverage: enable] }
+    }
+
+    pub fn set_normalized_coordinates(&self, enable: bool) {
+        unsafe { msg_send![self, setNormalizedCoordinates: enable] }
+    }
+
+    pub fn set_support_argument_buffers(&self, enable: bool) {
+        unsafe { msg_send![self, setSupportArgumentBuffers: enable] }
+    }
+
+    pub fn set_border_color(&self, color: MTLSamplerBorderColor) {
+        unsafe { msg_send![self, setBorderColor: color] }
+    }
+
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: nslabel];
+        }
+    }
+}
+
+pub enum MTLSamplerState {}
+
+foreign_obj_type! {
+    type CType = MTLSamplerState;
+    pub struct SamplerState;
+    pub struct SamplerStateRef;
+}
+
+impl SamplerStateRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+}
diff --git a/third_party/rust/metal/src/sync.rs b/third_party/rust/metal/src/sync.rs
new file mode 100644
index 0000000000..e4b3d8aa67
--- /dev/null
+++ b/third_party/rust/metal/src/sync.rs
@@ -0,0 +1,177 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+use block::{Block, RcBlock};
+use std::mem;
+
+#[cfg(feature = "dispatch_queue")]
+use dispatch;
+
+type MTLSharedEventNotificationBlock<'a> = RcBlock<(&'a SharedEventRef, u64), ()>;
+
+pub enum MTLEvent {}
+
+foreign_obj_type! {
+    type CType = MTLEvent;
+    pub struct Event;
+    pub struct EventRef;
+}
+
+impl EventRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+}
+
+pub enum MTLSharedEvent {}
+
+foreign_obj_type! {
+    type CType = MTLSharedEvent;
+    pub struct SharedEvent;
+    pub struct SharedEventRef;
+    type ParentType = EventRef;
+}
+
+impl SharedEventRef {
+    pub fn signaled_value(&self) -> u64 {
+        unsafe { msg_send![self, signaledValue] }
+    }
+
+    pub fn set_signaled_value(&self, new_value: u64) {
+        unsafe { msg_send![self, setSignaledValue: new_value] }
+    }
+
+    /// Schedules a notification handler to be called after the shareable event’s signal value
+    /// equals or exceeds a given value.
+    pub fn notify(
+        &self,
+        listener: &SharedEventListenerRef,
+        value: u64,
+        block: MTLSharedEventNotificationBlock,
+    ) {
+        unsafe {
+            // If the block doesn't have a signature, this segfaults.
+            // Taken from https://github.com/servo/pathfinder/blob/e858c8dc1d8ff02a5b603e21e09a64d6b3e11327/metal/src/lib.rs#L2327
+            let block = mem::transmute::<
+                MTLSharedEventNotificationBlock,
+                *mut BlockBase<(&SharedEventRef, u64), ()>,
+            >(block);
+            (*block).flags |= BLOCK_HAS_SIGNATURE | BLOCK_HAS_COPY_DISPOSE;
+            (*block).extra = &BLOCK_EXTRA;
+            let () = msg_send![self, notifyListener:listener atValue:value block:block];
+            mem::forget(block);
+        }
+
+        extern "C" fn dtor(_: *mut BlockBase<(&SharedEventRef, u64), ()>) {}
+
+        const SIGNATURE: &[u8] = b"v16@?0Q8\0";
+        const SIGNATURE_PTR: *const i8 = &SIGNATURE[0] as *const u8 as *const i8;
+        static mut BLOCK_EXTRA: BlockExtra<(&SharedEventRef, u64), ()> = BlockExtra {
+            unknown0: 0 as *mut i32,
+            unknown1: 0 as *mut i32,
+            unknown2: 0 as *mut i32,
+            dtor,
+            signature: &SIGNATURE_PTR,
+        };
+    }
+}
+
+pub enum MTLSharedEventListener {}
+
+foreign_obj_type! {
+    type CType = MTLSharedEventListener;
+    pub struct SharedEventListener;
+    pub struct SharedEventListenerRef;
+}
+
+impl SharedEventListener {
+    pub unsafe fn from_queue_handle(queue: dispatch_queue_t) -> Self {
+        let listener: SharedEventListener = msg_send![class!(MTLSharedEventListener), alloc];
+        let ptr: *mut Object = msg_send![listener.as_ref(), initWithDispatchQueue: queue];
+        if ptr.is_null() {
+            panic!("[MTLSharedEventListener alloc] initWithDispatchQueue failed");
+        }
+        listener
+    }
+
+    #[cfg(feature = "dispatch")]
+    pub fn from_queue(queue: &dispatch::Queue) -> Self {
+        unsafe {
+            let raw_queue = std::mem::transmute::<&dispatch::Queue, *const dispatch_queue_t>(queue);
+            Self::from_queue_handle(*raw_queue)
+        }
+    }
+}
+
+pub enum MTLFence {}
+
+foreign_obj_type! {
+    type CType = MTLFence;
+    pub struct Fence;
+    pub struct FenceRef;
+}
+
+impl FenceRef {
+    pub fn device(&self) -> &DeviceRef {
+        unsafe { msg_send![self, device] }
+    }
+
+    pub fn label(&self) -> &str {
+        unsafe {
+            let label = msg_send![self, label];
+            crate::nsstring_as_str(label)
+        }
+    }
+
+    pub fn set_label(&self, label: &str) {
+        unsafe {
+            let nslabel = crate::nsstring_from_str(label);
+            let () = msg_send![self, setLabel: nslabel];
+        }
+    }
+}
+
+bitflags! {
+    /// The render stages at which a synchronization command is triggered.
+    ///
+    /// Render stages provide finer control for specifying when synchronization must occur,
+    /// allowing for vertex and fragment processing to overlap in execution.
+    ///
+    /// See <https://developer.apple.com/documentation/metal/mtlrenderstages>
+    pub struct MTLRenderStages: NSUInteger {
+        /// The vertex rendering stage.
+        const Vertex = 1 << 0;
+        /// The fragment rendering stage.
+        const Fragment = 1 << 1;
+        /// The tile rendering stage.
+        const Tile = 1 << 2;
+    }
+}
+
+const BLOCK_HAS_COPY_DISPOSE: i32 = 0x02000000;
+const BLOCK_HAS_SIGNATURE: i32 = 0x40000000;
+
+#[repr(C)]
+struct BlockBase<A, R> {
+    isa: *const std::ffi::c_void,                             // 0x00
+    flags: i32,                                               // 0x08
+    _reserved: i32,                                           // 0x0c
+    invoke: unsafe extern "C" fn(*mut Block<A, R>, ...) -> R, // 0x10
+    extra: *const BlockExtra<A, R>,                           // 0x18
+}
+
+type BlockExtraDtor<A, R> = extern "C" fn(*mut BlockBase<A, R>);
+
+#[repr(C)]
+struct BlockExtra<A, R> {
+    unknown0: *mut i32,          // 0x00
+    unknown1: *mut i32,          // 0x08
+    unknown2: *mut i32,          // 0x10
+    dtor: BlockExtraDtor<A, R>,  // 0x18
+    signature: *const *const i8, // 0x20
+}
diff --git a/third_party/rust/metal/src/texture.rs b/third_party/rust/metal/src/texture.rs
new file mode 100644
index 0000000000..5e9f1b3d52
--- /dev/null
+++ b/third_party/rust/metal/src/texture.rs
@@ -0,0 +1,348 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::*;
+
+use objc::runtime::{NO, YES};
+
+#[repr(u64)]
+#[allow(non_camel_case_types)]
+#[derive(Copy, Clone, Debug, Hash, PartialEq, Eq)]
+pub enum MTLTextureType {
+    D1 = 0,
+    D1Array = 1,
+    D2 = 2,
+    D2Array = 3,
+    D2Multisample = 4,
+    Cube = 5,
+    CubeArray = 6,
+    D3 = 7,
+}
+
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Hash, PartialEq, Eq)]
+pub enum MTLTextureCompressionType {
+    Lossless = 0,
+    Lossy = 1,
+}
+
+bitflags! {
+    pub struct MTLTextureUsage: NSUInteger {
+        const Unknown         = 0x0000;
+        const ShaderRead      = 0x0001;
+        const ShaderWrite     = 0x0002;
+        const RenderTarget    = 0x0004;
+        const PixelFormatView = 0x0010;
+    }
+}
+
+pub enum MTLTextureDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLTextureDescriptor;
+    pub struct TextureDescriptor;
+    pub struct TextureDescriptorRef;
+}
+
+impl TextureDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLTextureDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl TextureDescriptorRef {
+    pub fn texture_type(&self) -> MTLTextureType {
+        unsafe { msg_send![self, textureType] }
+    }
+
+    pub fn set_texture_type(&self, texture_type: MTLTextureType) {
+        unsafe { msg_send![self, setTextureType: texture_type] }
+    }
+
+    pub fn pixel_format(&self) -> MTLPixelFormat {
+        unsafe { msg_send![self, pixelFormat] }
+    }
+
+    pub fn set_pixel_format(&self, pixel_format: MTLPixelFormat) {
+        unsafe { msg_send![self, setPixelFormat: pixel_format] }
+    }
+
+    pub fn width(&self) -> NSUInteger {
+        unsafe { msg_send![self, width] }
+    }
+
+    pub fn set_width(&self, width: NSUInteger) {
+        unsafe { msg_send![self, setWidth: width] }
+    }
+
+    pub fn height(&self) -> NSUInteger {
+        unsafe { msg_send![self, height] }
+    }
+
+    pub fn set_height(&self, height: NSUInteger) {
+        unsafe { msg_send![self, setHeight: height] }
+    }
+
+    pub fn depth(&self) -> NSUInteger {
+        unsafe { msg_send![self, depth] }
+    }
+
+    pub fn set_depth(&self, depth: NSUInteger) {
+        unsafe { msg_send![self, setDepth: depth] }
+    }
+
+    pub fn mipmap_level_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, mipmapLevelCount] }
+    }
+
+    pub fn set_mipmap_level_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setMipmapLevelCount: count] }
+    }
+
+    pub fn set_mipmap_level_count_for_size(&self, size: MTLSize) {
+        let MTLSize {
+            width,
+            height,
+            depth,
+        } = size;
+        let count = (width.max(height).max(depth) as f64).log2().ceil() as u64;
+        self.set_mipmap_level_count(count);
+    }
+
+    pub fn sample_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, sampleCount] }
+    }
+
+    pub fn set_sample_count(&self, count: NSUInteger) {
+        unsafe { msg_send![self, setSampleCount: count] }
+    }
+
+    pub fn array_length(&self) -> NSUInteger {
+        unsafe { msg_send![self, arrayLength] }
+    }
+
+    pub fn set_array_length(&self, length: NSUInteger) {
+        unsafe { msg_send![self, setArrayLength: length] }
+    }
+
+    pub fn resource_options(&self) -> MTLResourceOptions {
+        unsafe { msg_send![self, resourceOptions] }
+    }
+
+    pub fn set_resource_options(&self, options: MTLResourceOptions) {
+        unsafe { msg_send![self, setResourceOptions: options] }
+    }
+
+    pub fn cpu_cache_mode(&self) -> MTLCPUCacheMode {
+        unsafe { msg_send![self, cpuCacheMode] }
+    }
+
+    pub fn set_cpu_cache_mode(&self, mode: MTLCPUCacheMode) {
+        unsafe { msg_send![self, setCpuCacheMode: mode] }
+    }
+
+    pub fn storage_mode(&self) -> MTLStorageMode {
+        unsafe { msg_send![self, storageMode] }
+    }
+
+    pub fn set_storage_mode(&self, mode: MTLStorageMode) {
+        unsafe { msg_send![self, setStorageMode: mode] }
+    }
+
+    pub fn usage(&self) -> MTLTextureUsage {
+        unsafe { msg_send![self, usage] }
+    }
+
+    pub fn set_usage(&self, usage: MTLTextureUsage) {
+        unsafe { msg_send![self, setUsage: usage] }
+    }
+
+    pub fn compression_type(&self) -> MTLTextureCompressionType {
+        unsafe { msg_send![self, compressionType] }
+    }
+
+    pub fn set_compression_type(&self, compression_type: MTLTextureCompressionType) {
+        unsafe { msg_send![self, setCompressionType: compression_type] }
+    }
+}
+
+pub enum MTLTexture {}
+
+foreign_obj_type! {
+    type CType = MTLTexture;
+    pub struct Texture;
+    pub struct TextureRef;
+    type ParentType = ResourceRef;
+}
+
+impl TextureRef {
+    #[deprecated(since = "0.13.0")]
+    pub fn root_resource(&self) -> Option<&ResourceRef> {
+        unsafe { msg_send![self, rootResource] }
+    }
+
+    pub fn parent_texture(&self) -> Option<&TextureRef> {
+        unsafe { msg_send![self, parentTexture] }
+    }
+
+    pub fn parent_relative_level(&self) -> NSUInteger {
+        unsafe { msg_send![self, parentRelativeLevel] }
+    }
+
+    pub fn parent_relative_slice(&self) -> NSUInteger {
+        unsafe { msg_send![self, parentRelativeSlice] }
+    }
+
+    pub fn buffer(&self) -> Option<&BufferRef> {
+        unsafe { msg_send![self, buffer] }
+    }
+
+    pub fn buffer_offset(&self) -> NSUInteger {
+        unsafe { msg_send![self, bufferOffset] }
+    }
+
+    pub fn buffer_stride(&self) -> NSUInteger {
+        unsafe { msg_send![self, bufferBytesPerRow] }
+    }
+
+    pub fn texture_type(&self) -> MTLTextureType {
+        unsafe { msg_send![self, textureType] }
+    }
+
+    pub fn pixel_format(&self) -> MTLPixelFormat {
+        unsafe { msg_send![self, pixelFormat] }
+    }
+
+    pub fn width(&self) -> NSUInteger {
+        unsafe { msg_send![self, width] }
+    }
+
+    pub fn height(&self) -> NSUInteger {
+        unsafe { msg_send![self, height] }
+    }
+
+    pub fn depth(&self) -> NSUInteger {
+        unsafe { msg_send![self, depth] }
+    }
+
+    pub fn mipmap_level_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, mipmapLevelCount] }
+    }
+
+    pub fn sample_count(&self) -> NSUInteger {
+        unsafe { msg_send![self, sampleCount] }
+    }
+
+    pub fn array_length(&self) -> NSUInteger {
+        unsafe { msg_send![self, arrayLength] }
+    }
+
+    pub fn usage(&self) -> MTLTextureUsage {
+        unsafe { msg_send![self, usage] }
+    }
+
+    /// [framebufferOnly Apple Docs](https://developer.apple.com/documentation/metal/mtltexture/1515749-framebufferonly?language=objc)
+    pub fn framebuffer_only(&self) -> bool {
+        unsafe {
+            match msg_send![self, isFramebufferOnly] {
+                YES => true,
+                NO => false,
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    pub fn get_bytes(
+        &self,
+        bytes: *mut std::ffi::c_void,
+        stride: NSUInteger,
+        region: MTLRegion,
+        mipmap_level: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self, getBytes:bytes
+                         bytesPerRow:stride
+                          fromRegion:region
+                         mipmapLevel:mipmap_level]
+        }
+    }
+
+    pub fn get_bytes_in_slice(
+        &self,
+        bytes: *mut std::ffi::c_void,
+        stride: NSUInteger,
+        image_stride: NSUInteger,
+        region: MTLRegion,
+        mipmap_level: NSUInteger,
+        slice: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self, getBytes:bytes
+                         bytesPerRow:stride
+                       bytesPerImage:image_stride
+                          fromRegion:region
+                         mipmapLevel:mipmap_level
+                               slice:slice]
+        }
+    }
+
+    pub fn replace_region(
+        &self,
+        region: MTLRegion,
+        mipmap_level: NSUInteger,
+        bytes: *const std::ffi::c_void,
+        stride: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self, replaceRegion:region
+                              mipmapLevel:mipmap_level
+                                withBytes:bytes
+                              bytesPerRow:stride]
+        }
+    }
+
+    pub fn replace_region_in_slice(
+        &self,
+        region: MTLRegion,
+        mipmap_level: NSUInteger,
+        slice: NSUInteger,
+        bytes: *const std::ffi::c_void,
+        stride: NSUInteger,
+        image_stride: NSUInteger,
+    ) {
+        unsafe {
+            msg_send![self, replaceRegion:region
+                              mipmapLevel:mipmap_level
+                                    slice:slice
+                                withBytes:bytes
+                              bytesPerRow:stride
+                            bytesPerImage:image_stride]
+        }
+    }
+
+    pub fn new_texture_view(&self, pixel_format: MTLPixelFormat) -> Texture {
+        unsafe { msg_send![self, newTextureViewWithPixelFormat: pixel_format] }
+    }
+
+    pub fn new_texture_view_from_slice(
+        &self,
+        pixel_format: MTLPixelFormat,
+        texture_type: MTLTextureType,
+        mipmap_levels: crate::NSRange,
+        slices: crate::NSRange,
+    ) -> Texture {
+        unsafe {
+            msg_send![self, newTextureViewWithPixelFormat:pixel_format
+                                                textureType:texture_type
+                                                     levels:mipmap_levels
+                                                     slices:slices]
+        }
+    }
+}
diff --git a/third_party/rust/metal/src/types.rs b/third_party/rust/metal/src/types.rs
new file mode 100644
index 0000000000..3ea937f061
--- /dev/null
+++ b/third_party/rust/metal/src/types.rs
@@ -0,0 +1,80 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::NSUInteger;
+use std::default::Default;
+
+#[repr(C)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash, Default)]
+pub struct MTLOrigin {
+    pub x: NSUInteger,
+    pub y: NSUInteger,
+    pub z: NSUInteger,
+}
+
+#[repr(C)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash, Default)]
+pub struct MTLSize {
+    pub width: NSUInteger,
+    pub height: NSUInteger,
+    pub depth: NSUInteger,
+}
+
+impl MTLSize {
+    pub fn new(width: NSUInteger, height: NSUInteger, depth: NSUInteger) -> Self {
+        Self {
+            width,
+            height,
+            depth,
+        }
+    }
+}
+
+#[repr(C)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash, Default)]
+pub struct MTLRegion {
+    pub origin: MTLOrigin,
+    pub size: MTLSize,
+}
+
+impl MTLRegion {
+    #[inline]
+    pub fn new_1d(x: NSUInteger, width: NSUInteger) -> Self {
+        Self::new_2d(x, 0, width, 1)
+    }
+
+    #[inline]
+    pub fn new_2d(x: NSUInteger, y: NSUInteger, width: NSUInteger, height: NSUInteger) -> Self {
+        Self::new_3d(x, y, 0, width, height, 1)
+    }
+
+    #[inline]
+    pub fn new_3d(
+        x: NSUInteger,
+        y: NSUInteger,
+        z: NSUInteger,
+        width: NSUInteger,
+        height: NSUInteger,
+        depth: NSUInteger,
+    ) -> Self {
+        Self {
+            origin: MTLOrigin { x, y, z },
+            size: MTLSize {
+                width,
+                height,
+                depth,
+            },
+        }
+    }
+}
+
+#[repr(C)]
+#[derive(Copy, Clone, Debug, PartialEq, Default)]
+pub struct MTLSamplePosition {
+    pub x: f32,
+    pub y: f32,
+}
diff --git a/third_party/rust/metal/src/vertexdescriptor.rs b/third_party/rust/metal/src/vertexdescriptor.rs
new file mode 100644
index 0000000000..201e1e30ad
--- /dev/null
+++ b/third_party/rust/metal/src/vertexdescriptor.rs
@@ -0,0 +1,248 @@
+// Copyright 2016 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use super::NSUInteger;
+
+#[repr(u64)]
+#[allow(non_camel_case_types)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLVertexFormat {
+    Invalid = 0,
+    UChar2 = 1,
+    UChar3 = 2,
+    UChar4 = 3,
+    Char2 = 4,
+    Char3 = 5,
+    Char4 = 6,
+    UChar2Normalized = 7,
+    UChar3Normalized = 8,
+    UChar4Normalized = 9,
+    Char2Normalized = 10,
+    Char3Normalized = 11,
+    Char4Normalized = 12,
+    UShort2 = 13,
+    UShort3 = 14,
+    UShort4 = 15,
+    Short2 = 16,
+    Short3 = 17,
+    Short4 = 18,
+    UShort2Normalized = 19,
+    UShort3Normalized = 20,
+    UShort4Normalized = 21,
+    Short2Normalized = 22,
+    Short3Normalized = 23,
+    Short4Normalized = 24,
+    Half2 = 25,
+    Half3 = 26,
+    Half4 = 27,
+    Float = 28,
+    Float2 = 29,
+    Float3 = 30,
+    Float4 = 31,
+    Int = 32,
+    Int2 = 33,
+    Int3 = 34,
+    Int4 = 35,
+    UInt = 36,
+    UInt2 = 37,
+    UInt3 = 38,
+    UInt4 = 39,
+    Int1010102Normalized = 40,
+    UInt1010102Normalized = 41,
+    UChar4Normalized_BGRA = 42,
+    UChar = 45,
+    Char = 46,
+    UCharNormalized = 47,
+    CharNormalized = 48,
+    UShort = 49,
+    Short = 50,
+    UShortNormalized = 51,
+    ShortNormalized = 52,
+    Half = 53,
+}
+
+#[repr(u64)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub enum MTLVertexStepFunction {
+    Constant = 0,
+    PerVertex = 1,
+    PerInstance = 2,
+    PerPatch = 3,
+    PerPatchControlPoint = 4,
+}
+
+pub enum MTLVertexBufferLayoutDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLVertexBufferLayoutDescriptor;
+    pub struct VertexBufferLayoutDescriptor;
+    pub struct VertexBufferLayoutDescriptorRef;
+}
+
+impl VertexBufferLayoutDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLVertexBufferLayoutDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl VertexBufferLayoutDescriptorRef {
+    pub fn stride(&self) -> NSUInteger {
+        unsafe { msg_send![self, stride] }
+    }
+
+    pub fn set_stride(&self, stride: NSUInteger) {
+        unsafe { msg_send![self, setStride: stride] }
+    }
+
+    pub fn step_function(&self) -> MTLVertexStepFunction {
+        unsafe { msg_send![self, stepFunction] }
+    }
+
+    pub fn set_step_function(&self, func: MTLVertexStepFunction) {
+        unsafe { msg_send![self, setStepFunction: func] }
+    }
+
+    pub fn step_rate(&self) -> NSUInteger {
+        unsafe { msg_send![self, stepRate] }
+    }
+
+    pub fn set_step_rate(&self, step_rate: NSUInteger) {
+        unsafe { msg_send![self, setStepRate: step_rate] }
+    }
+}
+
+pub enum MTLVertexBufferLayoutDescriptorArray {}
+
+foreign_obj_type! {
+    type CType = MTLVertexBufferLayoutDescriptorArray;
+    pub struct VertexBufferLayoutDescriptorArray;
+    pub struct VertexBufferLayoutDescriptorArrayRef;
+}
+
+impl VertexBufferLayoutDescriptorArrayRef {
+    pub fn object_at(&self, index: NSUInteger) -> Option<&VertexBufferLayoutDescriptorRef> {
+        unsafe { msg_send![self, objectAtIndexedSubscript: index] }
+    }
+
+    pub fn set_object_at(
+        &self,
+        index: NSUInteger,
+        layout: Option<&VertexBufferLayoutDescriptorRef>,
+    ) {
+        unsafe {
+            msg_send![self, setObject:layout
+                   atIndexedSubscript:index]
+        }
+    }
+}
+
+pub enum MTLVertexAttributeDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLVertexAttributeDescriptor;
+    pub struct VertexAttributeDescriptor;
+    pub struct VertexAttributeDescriptorRef;
+}
+
+impl VertexAttributeDescriptor {
+    pub fn new() -> Self {
+        unsafe {
+            let class = class!(MTLVertexAttributeDescriptor);
+            msg_send![class, new]
+        }
+    }
+}
+
+impl VertexAttributeDescriptorRef {
+    pub fn format(&self) -> MTLVertexFormat {
+        unsafe { msg_send![self, format] }
+    }
+
+    pub fn set_format(&self, format: MTLVertexFormat) {
+        unsafe { msg_send![self, setFormat: format] }
+    }
+
+    pub fn offset(&self) -> NSUInteger {
+        unsafe { msg_send![self, offset] }
+    }
+
+    pub fn set_offset(&self, offset: NSUInteger) {
+        unsafe { msg_send![self, setOffset: offset] }
+    }
+
+    pub fn buffer_index(&self) -> NSUInteger {
+        unsafe { msg_send![self, bufferIndex] }
+    }
+
+    pub fn set_buffer_index(&self, index: NSUInteger) {
+        unsafe { msg_send![self, setBufferIndex: index] }
+    }
+}
+
+pub enum MTLVertexAttributeDescriptorArray {}
+
+foreign_obj_type! {
+    type CType = MTLVertexAttributeDescriptorArray;
+    pub struct VertexAttributeDescriptorArray;
+    pub struct VertexAttributeDescriptorArrayRef;
+}
+
+impl VertexAttributeDescriptorArrayRef {
+    pub fn object_at(&self, index: NSUInteger) -> Option<&VertexAttributeDescriptorRef> {
+        unsafe { msg_send![self, objectAtIndexedSubscript: index] }
+    }
+
+    pub fn set_object_at(
+        &self,
+        index: NSUInteger,
+        attribute: Option<&VertexAttributeDescriptorRef>,
+    ) {
+        unsafe {
+            msg_send![self, setObject:attribute
+                   atIndexedSubscript:index]
+        }
+    }
+}
+
+pub enum MTLVertexDescriptor {}
+
+foreign_obj_type! {
+    type CType = MTLVertexDescriptor;
+    pub struct VertexDescriptor;
+    pub struct VertexDescriptorRef;
+}
+
+impl VertexDescriptor {
+    pub fn new<'a>() -> &'a VertexDescriptorRef {
+        unsafe {
+            let class = class!(MTLVertexDescriptor);
+            msg_send![class, vertexDescriptor]
+        }
+    }
+}
+
+impl VertexDescriptorRef {
+    pub fn layouts(&self) -> &VertexBufferLayoutDescriptorArrayRef {
+        unsafe { msg_send![self, layouts] }
+    }
+
+    pub fn attributes(&self) -> &VertexAttributeDescriptorArrayRef {
+        unsafe { msg_send![self, attributes] }
+    }
+
+    #[cfg(feature = "private")]
+    pub unsafe fn serialize_descriptor(&self) -> *mut std::ffi::c_void {
+        msg_send![self, newSerializedDescriptor]
+    }
+
+    pub fn reset(&self) {
+        unsafe { msg_send![self, reset] }
+    }
+}
author	Daniel Baumann <daniel.baumann@progress-linux.org>	2024-04-07 19:33:14 +0000
committer	Daniel Baumann <daniel.baumann@progress-linux.org>	2024-04-07 19:33:14 +0000
commit	36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree	105e8c98ddea1c1e4784a60a5a6410fa416be2de /third_party/rust/metal
parent	Initial commit. (diff)
download	firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip