Adding upstream version 115.8.0esr.upstream/115.8.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 993 insertions, 0 deletions

diff --git a/gfx/wgpu_bindings/src/server.rs b/gfx/wgpu_bindings/src/server.rs
new file mode 100644
index 0000000000..6fb170761b
--- /dev/null
+++ b/gfx/wgpu_bindings/src/server.rs
@@ -0,0 +1,993 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use crate::{
+    identity::IdentityRecyclerFactory, wgpu_string, AdapterInformation, ByteBuf,
+    CommandEncoderAction, DeviceAction, DropAction, QueueWriteAction, TextureAction,
+};
+
+use nsstring::{nsACString, nsCString, nsString};
+
+use wgc::pipeline::CreateShaderModuleError;
+use wgc::{gfx_select, id};
+
+use std::borrow::Cow;
+use std::sync::atomic::{AtomicU32, Ordering};
+use std::{error::Error, os::raw::c_char, ptr, slice};
+
+/// We limit the size of buffer allocations for stability reason.
+/// We can reconsider this limit in the future. Note that some drivers (mesa for example),
+/// have issues when the size of a buffer, mapping or copy command does not fit into a
+/// signed 32 bits integer, so beyond a certain size, large allocations will need some form
+/// of driver allow/blocklist.
+const MAX_BUFFER_SIZE: wgt::BufferAddress = 1 << 30;
+// Mesa has issues with height/depth that don't fit in a 16 bits signed integers.
+const MAX_TEXTURE_EXTENT: u32 = std::i16::MAX as u32;
+
+/// A fixed-capacity, null-terminated error buffer owned by C++.
+///
+/// This type points to space owned by a C++ `mozilla::webgpu::ErrorBuffer`
+/// object, owned by our callers in `WebGPUParent.cpp`. If we catch a
+/// `Result::Err` here, we convert the error to a string, copy as much of that
+/// string as fits into this buffer, and null-terminate it. The caller
+/// determines whether a error occurred by simply checking if there's any text
+/// before the first null byte.
+///
+/// C++ callers of Rust functions that expect one of these structs can create a
+/// `mozilla::webgpu::ErrorBuffer` object, and call its `ToFFI` method to
+/// construct a value of this type, available to C++ as
+/// `mozilla::webgpu::ffi::WGPUErrorBuffer`.
+#[repr(C)]
+pub struct ErrorBuffer {
+    string: *mut c_char,
+    capacity: usize,
+}
+
+impl ErrorBuffer {
+    /// Fill this buffer with the textual representation of `error`.
+    ///
+    /// If the error message is too long, truncate it as needed. In either case,
+    /// the error message is always terminated by a zero byte.
+    ///
+    /// Note that there is no explicit indication of the message's length, only
+    /// the terminating zero byte. If the textual form of `error` itself
+    /// includes a zero byte (as Rust strings can), then the C++ code receiving
+    /// this error message has no way to distinguish that from the terminating
+    /// zero byte, and will see the message as shorter than it is.
+    fn init(&mut self, error: impl Error) {
+        use std::fmt::Write;
+
+        let mut string = format!("{}", error);
+        let mut e = error.source();
+        while let Some(source) = e {
+            write!(string, ", caused by: {}", source).unwrap();
+            e = source.source();
+        }
+
+        self.init_str(&string);
+    }
+
+    fn init_str(&mut self, message: &str) {
+        assert_ne!(self.capacity, 0);
+        let length = if message.len() >= self.capacity {
+            log::warn!(
+                "Error length {} reached capacity {}",
+                message.len(),
+                self.capacity
+            );
+            self.capacity - 1
+        } else {
+            message.len()
+        };
+        unsafe {
+            ptr::copy_nonoverlapping(message.as_ptr(), self.string as *mut u8, length);
+            *self.string.add(length) = 0;
+        }
+    }
+}
+
+// hide wgc's global in private
+pub struct Global(wgc::hub::Global<IdentityRecyclerFactory>);
+
+impl std::ops::Deref for Global {
+    type Target = wgc::hub::Global<IdentityRecyclerFactory>;
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+#[no_mangle]
+pub extern "C" fn wgpu_server_new(factory: IdentityRecyclerFactory) -> *mut Global {
+    log::info!("Initializing WGPU server");
+    let backends_pref = static_prefs::pref!("dom.webgpu.wgpu-backend").to_string();
+    let backends = if backends_pref.is_empty() {
+        wgt::Backends::PRIMARY
+    } else {
+        log::info!(
+            "Selecting backends based on dom.webgpu.wgpu-backend pref: {:?}",
+            backends_pref
+        );
+        wgc::instance::parse_backends_from_comma_list(&backends_pref)
+    };
+    let global = Global(wgc::hub::Global::new(
+        "wgpu",
+        factory,
+        wgt::InstanceDescriptor {
+            backends,
+            dx12_shader_compiler: wgt::Dx12Compiler::Fxc,
+        },
+    ));
+    Box::into_raw(Box::new(global))
+}
+
+/// # Safety
+///
+/// This function is unsafe because improper use may lead to memory
+/// problems. For example, a double-free may occur if the function is called
+/// twice on the same raw pointer.
+#[no_mangle]
+pub unsafe extern "C" fn wgpu_server_delete(global: *mut Global) {
+    log::info!("Terminating WGPU server");
+    let _ = Box::from_raw(global);
+}
+
+#[no_mangle]
+pub extern "C" fn wgpu_server_poll_all_devices(global: &Global, force_wait: bool) {
+    global.poll_all_devices(force_wait).unwrap();
+}
+
+/// Request an adapter according to the specified options.
+/// Provide the list of IDs to pick from.
+///
+/// Returns the index in this list, or -1 if unable to pick.
+///
+/// # Safety
+///
+/// This function is unsafe as there is no guarantee that the given pointer is
+/// valid for `id_length` elements.
+#[no_mangle]
+pub unsafe extern "C" fn wgpu_server_instance_request_adapter(
+    global: &Global,
+    desc: &wgc::instance::RequestAdapterOptions,
+    ids: *const id::AdapterId,
+    id_length: usize,
+    mut error_buf: ErrorBuffer,
+) -> i8 {
+    let ids = slice::from_raw_parts(ids, id_length);
+    match global.request_adapter(
+        desc,
+        wgc::instance::AdapterInputs::IdSet(ids, |i| i.backend()),
+    ) {
+        Ok(id) => ids.iter().position(|&i| i == id).unwrap() as i8,
+        Err(e) => {
+            error_buf.init(e);
+            -1
+        }
+    }
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn wgpu_server_adapter_pack_info(
+    global: &Global,
+    self_id: Option<id::AdapterId>,
+    byte_buf: &mut ByteBuf,
+) {
+    let mut data = Vec::new();
+    match self_id {
+        Some(id) => {
+            let wgt::AdapterInfo {
+                name,
+                vendor,
+                device,
+                device_type,
+                driver,
+                driver_info,
+                backend,
+            } = gfx_select!(id => global.adapter_get_info(id)).unwrap();
+
+            let info = AdapterInformation {
+                id,
+                limits: gfx_select!(id => global.adapter_limits(id)).unwrap(),
+                features: gfx_select!(id => global.adapter_features(id)).unwrap(),
+                name,
+                vendor,
+                device,
+                device_type,
+                driver,
+                driver_info,
+                backend,
+            };
+            bincode::serialize_into(&mut data, &info).unwrap();
+        }
+        None => {
+            bincode::serialize_into(&mut data, &0u64).unwrap();
+        }
+    }
+    *byte_buf = ByteBuf::from_vec(data);
+}
+
+static TRACE_IDX: AtomicU32 = AtomicU32::new(0);
+
+#[no_mangle]
+pub unsafe extern "C" fn wgpu_server_adapter_request_device(
+    global: &Global,
+    self_id: id::AdapterId,
+    byte_buf: &ByteBuf,
+    new_id: id::DeviceId,
+    mut error_buf: ErrorBuffer,
+) {
+    let desc: wgc::device::DeviceDescriptor = bincode::deserialize(byte_buf.as_slice()).unwrap();
+    let trace_string = std::env::var("WGPU_TRACE").ok().map(|s| {
+        let idx = TRACE_IDX.fetch_add(1, Ordering::Relaxed);
+        let path = format!("{}/{}/", s, idx);
+
+        if std::fs::create_dir_all(&path).is_err() {
+            log::warn!("Failed to create directory {:?} for wgpu recording.", path);
+        }
+
+        path
+    });
+    let trace_path = trace_string
+        .as_ref()
+        .map(|string| std::path::Path::new(string.as_str()));
+    let (_, error) =
+        gfx_select!(self_id => global.adapter_request_device(self_id, &desc, trace_path, new_id));
+    if let Some(err) = error {
+        error_buf.init(err);
+    }
+}
+
+#[no_mangle]
+pub extern "C" fn wgpu_server_adapter_drop(global: &Global, adapter_id: id::AdapterId) {
+    gfx_select!(adapter_id => global.adapter_drop(adapter_id))
+}
+
+#[no_mangle]
+pub extern "C" fn wgpu_server_device_drop(global: &Global, self_id: id::DeviceId) {
+    gfx_select!(self_id => global.device_drop(self_id))
+}
+
+impl ShaderModuleCompilationMessage {
+    fn set_error(&mut self, error: &CreateShaderModuleError, source: &str) {
+        // The WebGPU spec says that if the message doesn't point to a particular position in
+        // the source, the line number, position, offset and lengths should be zero.
+        self.line_number = 0;
+        self.line_pos = 0;
+        self.utf16_offset = 0;
+        self.utf16_length = 0;
+
+        if let Some(location) = error.location(source) {
+            self.line_number = location.line_number as u64;
+            self.line_pos = location.line_position as u64;
+
+            let start = location.offset as usize;
+            let end = start + location.length as usize;
+            self.utf16_offset = source[0..start].chars().map(|c| c.len_utf16() as u64).sum();
+            self.utf16_length = source[start..end]
+                .chars()
+                .map(|c| c.len_utf16() as u64)
+                .sum();
+        }
+
+        let error_string = error.to_string();
+
+        if !error_string.is_empty() {
+            self.message = nsString::from(&error_string[..]);
+        }
+    }
+}
+
+/// A compilation message representation for the ffi boundary.
+/// the message is immediately copied into an equivalent C++
+/// structure that owns its strings.
+#[repr(C)]
+#[derive(Clone)]
+pub struct ShaderModuleCompilationMessage {
+    pub line_number: u64,
+    pub line_pos: u64,
+    pub utf16_offset: u64,
+    pub utf16_length: u64,
+    pub message: nsString,
+}
+
+/// Creates a shader module and returns an object describing the errors if any.
+///
+/// If there was no error, the returned pointer is nil.
+#[no_mangle]
+pub extern "C" fn wgpu_server_device_create_shader_module(
+    global: &Global,
+    self_id: id::DeviceId,
+    module_id: id::ShaderModuleId,
+    label: Option<&nsACString>,
+    code: &nsCString,
+    out_message: &mut ShaderModuleCompilationMessage,
+) -> bool {
+    let utf8_label = label.map(|utf16| utf16.to_string());
+    let label = utf8_label.as_ref().map(|s| Cow::from(&s[..]));
+
+    let source_str = code.to_utf8();
+
+    let source = wgc::pipeline::ShaderModuleSource::Wgsl(Cow::from(&source_str[..]));
+
+    let desc = wgc::pipeline::ShaderModuleDescriptor {
+        label,
+        shader_bound_checks: wgt::ShaderBoundChecks::new(),
+    };
+
+    let (_, error) = gfx_select!(
+        self_id => global.device_create_shader_module(
+            self_id, &desc, source, module_id
+        )
+    );
+
+    if let Some(err) = error {
+        out_message.set_error(&err, &source_str[..]);
+        return false;
+    }
+
+    // Avoid allocating the structure that holds errors in the common case (no errors).
+    return true;
+}
+
+#[no_mangle]
+pub extern "C" fn wgpu_server_device_create_buffer(
+    global: &Global,
+    self_id: id::DeviceId,
+    buffer_id: id::BufferId,
+    label: Option<&nsACString>,
+    size: wgt::BufferAddress,
+    usage: u32,
+    mapped_at_creation: bool,
+    mut error_buf: ErrorBuffer,
+) {
+    let utf8_label = label.map(|utf16| utf16.to_string());
+    let label = utf8_label.as_ref().map(|s| Cow::from(&s[..]));
+    let usage = wgt::BufferUsages::from_bits_retain(usage);
+
+    // Don't trust the graphics driver with buffer sizes larger than our conservative max texture size.
+    if size > MAX_BUFFER_SIZE {
+        error_buf.init_str("Out of memory");
+        gfx_select!(self_id => global.create_buffer_error(buffer_id, label));
+        return;
+    }
+
+    let desc = wgc::resource::BufferDescriptor {
+        label,
+        size,
+        usage,
+        mapped_at_creation,
+    };
+    let (_, error) = gfx_select!(self_id => global.device_create_buffer(self_id, &desc, buffer_id));
+    if let Some(err) = error {
+        error_buf.init(err);
+    }
+}
+
+/// # Safety
+///
+/// Callers are responsible for ensuring `callback` is well-formed.
+#[no_mangle]
+pub unsafe extern "C" fn wgpu_server_buffer_map(
+    global: &Global,
+    buffer_id: id::BufferId,
+    start: wgt::BufferAddress,
+    size: wgt::BufferAddress,
+    map_mode: wgc::device::HostMap,
+    callback: wgc::resource::BufferMapCallbackC,
+) {
+    let callback = wgc::resource::BufferMapCallback::from_c(callback);
+    let operation = wgc::resource::BufferMapOperation {
+        host: map_mode,
+        callback,
+    };
+    // All errors are also exposed to the mapping callback, so we handle them there and ignore
+    // the the returned value of buffer_map_async.
+    let _ = gfx_select!(buffer_id => global.buffer_map_async(
+        buffer_id,
+        start .. start + size,
+        operation
+    ));
+}
+
+#[repr(C)]
+pub struct MappedBufferSlice {
+    pub ptr: *mut u8,
+    pub length: u64,
+}
+
+/// # Safety
+///
+/// This function is unsafe as there is no guarantee that the given pointer is
+/// valid for `size` elements.
+#[no_mangle]
+pub unsafe extern "C" fn wgpu_server_buffer_get_mapped_range(
+    global: &Global,
+    buffer_id: id::BufferId,
+    start: wgt::BufferAddress,
+    size: wgt::BufferAddress,
+) -> MappedBufferSlice {
+    let result = gfx_select!(buffer_id => global.buffer_get_mapped_range(
+        buffer_id,
+        start,
+        Some(size)
+    ));
+
+    // TODO: error reporting.
+
+    result
+        .map(|(ptr, length)| MappedBufferSlice { ptr, length })
+        .unwrap_or(MappedBufferSlice {
+            ptr: std::ptr::null_mut(),
+            length: 0,
+        })
+}
+
+#[no_mangle]
+pub extern "C" fn wgpu_server_buffer_unmap(
+    global: &Global,
+    buffer_id: id::BufferId,
+    mut error_buf: ErrorBuffer,
+) {
+    if let Err(e) = gfx_select!(buffer_id => global.buffer_unmap(buffer_id)) {
+        error_buf.init(e);
+    }
+}
+
+#[no_mangle]
+pub extern "C" fn wgpu_server_buffer_destroy(global: &Global, self_id: id::BufferId) {
+    // Per spec, there is no need for the buffer or even device to be in a valid state,
+    // even calling calling destroy multiple times is fine, so no error to push into
+    // an error scope.
+    let _ = gfx_select!(self_id => global.buffer_destroy(self_id));
+}
+
+#[no_mangle]
+pub extern "C" fn wgpu_server_buffer_drop(global: &Global, self_id: id::BufferId) {
+    gfx_select!(self_id => global.buffer_drop(self_id, false));
+}
+
+impl Global {
+    fn device_action<A: wgc::hub::HalApi>(
+        &self,
+        self_id: id::DeviceId,
+        action: DeviceAction,
+        mut error_buf: ErrorBuffer,
+    ) {
+        match action {
+            DeviceAction::CreateTexture(id, desc) => {
+                let max = MAX_TEXTURE_EXTENT;
+                if desc.size.width > max
+                    || desc.size.height > max
+                    || desc.size.depth_or_array_layers > max
+                {
+                    gfx_select!(self_id => self.create_texture_error(id, desc.label));
+                    error_buf.init_str("Out of memory");
+                    return;
+                }
+                let (_, error) = self.device_create_texture::<A>(self_id, &desc, id);
+                if let Some(err) = error {
+                    error_buf.init(err);
+                }
+            }
+            DeviceAction::CreateSampler(id, desc) => {
+                let (_, error) = self.device_create_sampler::<A>(self_id, &desc, id);
+                if let Some(err) = error {
+                    error_buf.init(err);
+                }
+            }
+            DeviceAction::CreateBindGroupLayout(id, desc) => {
+                let (_, error) = self.device_create_bind_group_layout::<A>(self_id, &desc, id);
+                if let Some(err) = error {
+                    error_buf.init(err);
+                }
+            }
+            DeviceAction::CreatePipelineLayout(id, desc) => {
+                let (_, error) = self.device_create_pipeline_layout::<A>(self_id, &desc, id);
+                if let Some(err) = error {
+                    error_buf.init(err);
+                }
+            }
+            DeviceAction::CreateBindGroup(id, desc) => {
+                let (_, error) = self.device_create_bind_group::<A>(self_id, &desc, id);
+                if let Some(err) = error {
+                    error_buf.init(err);
+                }
+            }
+            DeviceAction::CreateShaderModule(id, desc, code) => {
+                let source = wgc::pipeline::ShaderModuleSource::Wgsl(code);
+                let (_, error) = self.device_create_shader_module::<A>(self_id, &desc, source, id);
+                if let Some(err) = error {
+                    error_buf.init(err);
+                }
+            }
+            DeviceAction::CreateComputePipeline(id, desc, implicit) => {
+                let implicit_ids = implicit
+                    .as_ref()
+                    .map(|imp| wgc::device::ImplicitPipelineIds {
+                        root_id: imp.pipeline,
+                        group_ids: &imp.bind_groups,
+                    });
+                let (_, error) =
+                    self.device_create_compute_pipeline::<A>(self_id, &desc, id, implicit_ids);
+                if let Some(err) = error {
+                    error_buf.init(err);
+                }
+            }
+            DeviceAction::CreateRenderPipeline(id, desc, implicit) => {
+                let implicit_ids = implicit
+                    .as_ref()
+                    .map(|imp| wgc::device::ImplicitPipelineIds {
+                        root_id: imp.pipeline,
+                        group_ids: &imp.bind_groups,
+                    });
+                let (_, error) =
+                    self.device_create_render_pipeline::<A>(self_id, &desc, id, implicit_ids);
+                if let Some(err) = error {
+                    error_buf.init(err);
+                }
+            }
+            DeviceAction::CreateRenderBundle(id, encoder, desc) => {
+                let (_, error) = self.render_bundle_encoder_finish::<A>(encoder, &desc, id);
+                if let Some(err) = error {
+                    error_buf.init(err);
+                }
+            }
+            DeviceAction::CreateCommandEncoder(id, desc) => {
+                let (_, error) = self.device_create_command_encoder::<A>(self_id, &desc, id);
+                if let Some(err) = error {
+                    error_buf.init(err);
+                }
+            }
+            DeviceAction::Error(message) => {
+                error_buf.init_str(&message);
+            }
+        }
+    }
+
+    fn texture_action<A: wgc::hub::HalApi>(
+        &self,
+        self_id: id::TextureId,
+        action: TextureAction,
+        mut error_buf: ErrorBuffer,
+    ) {
+        match action {
+            TextureAction::CreateView(id, desc) => {
+                let (_, error) = self.texture_create_view::<A>(self_id, &desc, id);
+                if let Some(err) = error {
+                    error_buf.init(err);
+                }
+            }
+        }
+    }
+
+    fn command_encoder_action<A: wgc::hub::HalApi>(
+        &self,
+        self_id: id::CommandEncoderId,
+        action: CommandEncoderAction,
+        mut error_buf: ErrorBuffer,
+    ) {
+        match action {
+            CommandEncoderAction::CopyBufferToBuffer {
+                src,
+                src_offset,
+                dst,
+                dst_offset,
+                size,
+            } => {
+                if let Err(err) = self.command_encoder_copy_buffer_to_buffer::<A>(
+                    self_id, src, src_offset, dst, dst_offset, size,
+                ) {
+                    error_buf.init(err);
+                }
+            }
+            CommandEncoderAction::CopyBufferToTexture { src, dst, size } => {
+                if let Err(err) =
+                    self.command_encoder_copy_buffer_to_texture::<A>(self_id, &src, &dst, &size)
+                {
+                    error_buf.init(err);
+                }
+            }
+            CommandEncoderAction::CopyTextureToBuffer { src, dst, size } => {
+                if let Err(err) =
+                    self.command_encoder_copy_texture_to_buffer::<A>(self_id, &src, &dst, &size)
+                {
+                    error_buf.init(err);
+                }
+            }
+            CommandEncoderAction::CopyTextureToTexture { src, dst, size } => {
+                if let Err(err) =
+                    self.command_encoder_copy_texture_to_texture::<A>(self_id, &src, &dst, &size)
+                {
+                    error_buf.init(err);
+                }
+            }
+            CommandEncoderAction::RunComputePass { base } => {
+                if let Err(err) =
+                    self.command_encoder_run_compute_pass_impl::<A>(self_id, base.as_ref())
+                {
+                    error_buf.init(err);
+                }
+            }
+            CommandEncoderAction::WriteTimestamp {
+                query_set_id,
+                query_index,
+            } => {
+                if let Err(err) =
+                    self.command_encoder_write_timestamp::<A>(self_id, query_set_id, query_index)
+                {
+                    error_buf.init(err);
+                }
+            }
+            CommandEncoderAction::ResolveQuerySet {
+                query_set_id,
+                start_query,
+                query_count,
+                destination,
+                destination_offset,
+            } => {
+                if let Err(err) = self.command_encoder_resolve_query_set::<A>(
+                    self_id,
+                    query_set_id,
+                    start_query,
+                    query_count,
+                    destination,
+                    destination_offset,
+                ) {
+                    error_buf.init(err);
+                }
+            }
+            CommandEncoderAction::RunRenderPass {
+                base,
+                target_colors,
+                target_depth_stencil,
+            } => {
+                if let Err(err) = self.command_encoder_run_render_pass_impl::<A>(
+                    self_id,
+                    base.as_ref(),
+                    &target_colors,
+                    target_depth_stencil.as_ref(),
+                ) {
+                    error_buf.init(err);
+                }
+            }
+            CommandEncoderAction::ClearBuffer { dst, offset, size } => {
+                if let Err(err) = self.command_encoder_clear_buffer::<A>(self_id, dst, offset, size)
+                {
+                    error_buf.init(err);
+                }
+            }
+            CommandEncoderAction::ClearTexture {
+                dst,
+                ref subresource_range,
+            } => {
+                if let Err(err) =
+                    self.command_encoder_clear_texture::<A>(self_id, dst, subresource_range)
+                {
+                    error_buf.init(err);
+                }
+            }
+            CommandEncoderAction::PushDebugGroup(marker) => {
+                if let Err(err) = self.command_encoder_push_debug_group::<A>(self_id, &marker) {
+                    error_buf.init(err);
+                }
+            }
+            CommandEncoderAction::PopDebugGroup => {
+                if let Err(err) = self.command_encoder_pop_debug_group::<A>(self_id) {
+                    error_buf.init(err);
+                }
+            }
+            CommandEncoderAction::InsertDebugMarker(marker) => {
+                if let Err(err) = self.command_encoder_insert_debug_marker::<A>(self_id, &marker) {
+                    error_buf.init(err);
+                }
+            }
+        }
+    }
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn wgpu_server_device_action(
+    global: &Global,
+    self_id: id::DeviceId,
+    byte_buf: &ByteBuf,
+    error_buf: ErrorBuffer,
+) {
+    let action = bincode::deserialize(byte_buf.as_slice()).unwrap();
+    gfx_select!(self_id => global.device_action(self_id, action, error_buf));
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn wgpu_server_texture_action(
+    global: &Global,
+    self_id: id::TextureId,
+    byte_buf: &ByteBuf,
+    error_buf: ErrorBuffer,
+) {
+    let action = bincode::deserialize(byte_buf.as_slice()).unwrap();
+    gfx_select!(self_id => global.texture_action(self_id, action, error_buf));
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn wgpu_server_command_encoder_action(
+    global: &Global,
+    self_id: id::CommandEncoderId,
+    byte_buf: &ByteBuf,
+    error_buf: ErrorBuffer,
+) {
+    let action = bincode::deserialize(byte_buf.as_slice()).unwrap();
+    gfx_select!(self_id => global.command_encoder_action(self_id, action, error_buf));
+}
+
+#[no_mangle]
+pub extern "C" fn wgpu_server_device_create_encoder(
+    global: &Global,
+    self_id: id::DeviceId,
+    desc: &wgt::CommandEncoderDescriptor<Option<&nsACString>>,
+    new_id: id::CommandEncoderId,
+    mut error_buf: ErrorBuffer,
+) {
+    let utf8_label = desc.label.map(|utf16| utf16.to_string());
+    let label = utf8_label.as_ref().map(|s| Cow::from(&s[..]));
+
+    let desc = desc.map_label(|_| label);
+    let (_, error) =
+        gfx_select!(self_id => global.device_create_command_encoder(self_id, &desc, new_id));
+    if let Some(err) = error {
+        error_buf.init(err);
+    }
+}
+
+#[no_mangle]
+pub extern "C" fn wgpu_server_encoder_finish(
+    global: &Global,
+    self_id: id::CommandEncoderId,
+    desc: &wgt::CommandBufferDescriptor<Option<&nsACString>>,
+    mut error_buf: ErrorBuffer,
+) {
+    let label = wgpu_string(desc.label);
+    let desc = desc.map_label(|_| label);
+    let (_, error) = gfx_select!(self_id => global.command_encoder_finish(self_id, &desc));
+    if let Some(err) = error {
+        error_buf.init(err);
+    }
+}
+
+#[no_mangle]
+pub extern "C" fn wgpu_server_encoder_drop(global: &Global, self_id: id::CommandEncoderId) {
+    gfx_select!(self_id => global.command_encoder_drop(self_id));
+}
+
+#[no_mangle]
+pub extern "C" fn wgpu_server_command_buffer_drop(global: &Global, self_id: id::CommandBufferId) {
+    gfx_select!(self_id => global.command_buffer_drop(self_id));
+}
+
+#[no_mangle]
+pub extern "C" fn wgpu_server_render_bundle_drop(global: &Global, self_id: id::RenderBundleId) {
+    gfx_select!(self_id => global.render_bundle_drop(self_id));
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn wgpu_server_encoder_copy_texture_to_buffer(
+    global: &Global,
+    self_id: id::CommandEncoderId,
+    source: &wgc::command::ImageCopyTexture,
+    dst_buffer: wgc::id::BufferId,
+    dst_layout: &crate::ImageDataLayout,
+    size: &wgt::Extent3d,
+) {
+    let destination = wgc::command::ImageCopyBuffer {
+        buffer: dst_buffer,
+        layout: dst_layout.into_wgt(),
+    };
+    gfx_select!(self_id => global.command_encoder_copy_texture_to_buffer(self_id, source, &destination, size)).unwrap();
+}
+
+/// # Safety
+///
+/// This function is unsafe as there is no guarantee that the given pointer is
+/// valid for `command_buffer_id_length` elements.
+#[no_mangle]
+pub unsafe extern "C" fn wgpu_server_queue_submit(
+    global: &Global,
+    self_id: id::QueueId,
+    command_buffer_ids: *const id::CommandBufferId,
+    command_buffer_id_length: usize,
+    mut error_buf: ErrorBuffer,
+) {
+    let command_buffers = slice::from_raw_parts(command_buffer_ids, command_buffer_id_length);
+    let result = gfx_select!(self_id => global.queue_submit(self_id, command_buffers));
+    if let Err(err) = result {
+        error_buf.init(err);
+    }
+}
+
+/// # Safety
+///
+/// This function is unsafe as there is no guarantee that the given pointer is
+/// valid for `data_length` elements.
+#[no_mangle]
+pub unsafe extern "C" fn wgpu_server_queue_write_action(
+    global: &Global,
+    self_id: id::QueueId,
+    byte_buf: &ByteBuf,
+    data: *const u8,
+    data_length: usize,
+    mut error_buf: ErrorBuffer,
+) {
+    let action: QueueWriteAction = bincode::deserialize(byte_buf.as_slice()).unwrap();
+    let data = slice::from_raw_parts(data, data_length);
+    let result = match action {
+        QueueWriteAction::Buffer { dst, offset } => {
+            gfx_select!(self_id => global.queue_write_buffer(self_id, dst, offset, data))
+        }
+        QueueWriteAction::Texture { dst, layout, size } => {
+            gfx_select!(self_id => global.queue_write_texture(self_id, &dst, data, &layout, &size))
+        }
+    };
+    if let Err(err) = result {
+        error_buf.init(err);
+    }
+}
+
+#[no_mangle]
+pub extern "C" fn wgpu_server_bind_group_layout_drop(
+    global: &Global,
+    self_id: id::BindGroupLayoutId,
+) {
+    gfx_select!(self_id => global.bind_group_layout_drop(self_id));
+}
+
+#[no_mangle]
+pub extern "C" fn wgpu_server_pipeline_layout_drop(global: &Global, self_id: id::PipelineLayoutId) {
+    gfx_select!(self_id => global.pipeline_layout_drop(self_id));
+}
+
+#[no_mangle]
+pub extern "C" fn wgpu_server_bind_group_drop(global: &Global, self_id: id::BindGroupId) {
+    gfx_select!(self_id => global.bind_group_drop(self_id));
+}
+
+#[no_mangle]
+pub extern "C" fn wgpu_server_shader_module_drop(global: &Global, self_id: id::ShaderModuleId) {
+    gfx_select!(self_id => global.shader_module_drop(self_id));
+}
+
+#[no_mangle]
+pub extern "C" fn wgpu_server_compute_pipeline_drop(
+    global: &Global,
+    self_id: id::ComputePipelineId,
+) {
+    gfx_select!(self_id => global.compute_pipeline_drop(self_id));
+}
+
+#[no_mangle]
+pub extern "C" fn wgpu_server_render_pipeline_drop(global: &Global, self_id: id::RenderPipelineId) {
+    gfx_select!(self_id => global.render_pipeline_drop(self_id));
+}
+
+#[no_mangle]
+pub extern "C" fn wgpu_server_texture_drop(global: &Global, self_id: id::TextureId) {
+    gfx_select!(self_id => global.texture_drop(self_id, false));
+}
+
+#[no_mangle]
+pub extern "C" fn wgpu_server_texture_view_drop(global: &Global, self_id: id::TextureViewId) {
+    gfx_select!(self_id => global.texture_view_drop(self_id, false)).unwrap();
+}
+
+#[no_mangle]
+pub extern "C" fn wgpu_server_sampler_drop(global: &Global, self_id: id::SamplerId) {
+    gfx_select!(self_id => global.sampler_drop(self_id));
+}
+
+#[no_mangle]
+pub extern "C" fn wgpu_server_compute_pipeline_get_bind_group_layout(
+    global: &Global,
+    self_id: id::ComputePipelineId,
+    index: u32,
+    assign_id: id::BindGroupLayoutId,
+    mut error_buf: ErrorBuffer,
+) {
+    let (_, error) = gfx_select!(self_id => global.compute_pipeline_get_bind_group_layout(self_id, index, assign_id));
+    if let Some(err) = error {
+        error_buf.init(err);
+    }
+}
+
+#[no_mangle]
+pub extern "C" fn wgpu_server_render_pipeline_get_bind_group_layout(
+    global: &Global,
+    self_id: id::RenderPipelineId,
+    index: u32,
+    assign_id: id::BindGroupLayoutId,
+    mut error_buf: ErrorBuffer,
+) {
+    let (_, error) = gfx_select!(self_id => global.render_pipeline_get_bind_group_layout(self_id, index, assign_id));
+    if let Some(err) = error {
+        error_buf.init(err);
+    }
+}
+
+/// Encode the freeing of the selected ID into a byte buf.
+#[no_mangle]
+pub extern "C" fn wgpu_server_adapter_free(id: id::AdapterId, drop_byte_buf: &mut ByteBuf) {
+    *drop_byte_buf = DropAction::Adapter(id).to_byte_buf();
+}
+#[no_mangle]
+pub extern "C" fn wgpu_server_device_free(id: id::DeviceId, drop_byte_buf: &mut ByteBuf) {
+    *drop_byte_buf = DropAction::Device(id).to_byte_buf();
+}
+#[no_mangle]
+pub extern "C" fn wgpu_server_shader_module_free(
+    id: id::ShaderModuleId,
+    drop_byte_buf: &mut ByteBuf,
+) {
+    *drop_byte_buf = DropAction::ShaderModule(id).to_byte_buf();
+}
+#[no_mangle]
+pub extern "C" fn wgpu_server_pipeline_layout_free(
+    id: id::PipelineLayoutId,
+    drop_byte_buf: &mut ByteBuf,
+) {
+    *drop_byte_buf = DropAction::PipelineLayout(id).to_byte_buf();
+}
+#[no_mangle]
+pub extern "C" fn wgpu_server_bind_group_layout_free(
+    id: id::BindGroupLayoutId,
+    drop_byte_buf: &mut ByteBuf,
+) {
+    *drop_byte_buf = DropAction::BindGroupLayout(id).to_byte_buf();
+}
+#[no_mangle]
+pub extern "C" fn wgpu_server_bind_group_free(id: id::BindGroupId, drop_byte_buf: &mut ByteBuf) {
+    *drop_byte_buf = DropAction::BindGroup(id).to_byte_buf();
+}
+#[no_mangle]
+pub extern "C" fn wgpu_server_command_buffer_free(
+    id: id::CommandBufferId,
+    drop_byte_buf: &mut ByteBuf,
+) {
+    *drop_byte_buf = DropAction::CommandBuffer(id).to_byte_buf();
+}
+#[no_mangle]
+pub extern "C" fn wgpu_server_render_bundle_free(
+    id: id::RenderBundleId,
+    drop_byte_buf: &mut ByteBuf,
+) {
+    *drop_byte_buf = DropAction::RenderBundle(id).to_byte_buf();
+}
+#[no_mangle]
+pub extern "C" fn wgpu_server_render_pipeline_free(
+    id: id::RenderPipelineId,
+    drop_byte_buf: &mut ByteBuf,
+) {
+    *drop_byte_buf = DropAction::RenderPipeline(id).to_byte_buf();
+}
+#[no_mangle]
+pub extern "C" fn wgpu_server_compute_pipeline_free(
+    id: id::ComputePipelineId,
+    drop_byte_buf: &mut ByteBuf,
+) {
+    *drop_byte_buf = DropAction::ComputePipeline(id).to_byte_buf();
+}
+#[no_mangle]
+pub extern "C" fn wgpu_server_buffer_free(id: id::BufferId, drop_byte_buf: &mut ByteBuf) {
+    *drop_byte_buf = DropAction::Buffer(id).to_byte_buf();
+}
+#[no_mangle]
+pub extern "C" fn wgpu_server_texture_free(id: id::TextureId, drop_byte_buf: &mut ByteBuf) {
+    *drop_byte_buf = DropAction::Texture(id).to_byte_buf();
+}
+#[no_mangle]
+pub extern "C" fn wgpu_server_texture_view_free(
+    id: id::TextureViewId,
+    drop_byte_buf: &mut ByteBuf,
+) {
+    *drop_byte_buf = DropAction::TextureView(id).to_byte_buf();
+}
+#[no_mangle]
+pub extern "C" fn wgpu_server_sampler_free(id: id::SamplerId, drop_byte_buf: &mut ByteBuf) {
+    *drop_byte_buf = DropAction::Sampler(id).to_byte_buf();
+}