Adding upstream version 110.0.1.upstream/110.0.1upstream

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

1 files changed, 453 insertions, 0 deletions

diff --git a/third_party/rust/wgpu-hal/src/gles/conv.rs b/third_party/rust/wgpu-hal/src/gles/conv.rs
new file mode 100644
index 0000000000..93f015363f
--- /dev/null
+++ b/third_party/rust/wgpu-hal/src/gles/conv.rs
@@ -0,0 +1,453 @@
+impl super::AdapterShared {
+    pub(super) fn describe_texture_format(
+        &self,
+        texture_format: wgt::TextureFormat,
+    ) -> super::TextureFormatDesc {
+        use wgt::TextureFormat as Tf;
+        use wgt::{AstcBlock, AstcChannel};
+
+        let (internal, external, data_type) = match texture_format {
+            Tf::R8Unorm => (glow::R8, glow::RED, glow::UNSIGNED_BYTE),
+            Tf::R8Snorm => (glow::R8_SNORM, glow::RED, glow::BYTE),
+            Tf::R8Uint => (glow::R8UI, glow::RED_INTEGER, glow::UNSIGNED_BYTE),
+            Tf::R8Sint => (glow::R8I, glow::RED_INTEGER, glow::BYTE),
+            Tf::R16Uint => (glow::R16UI, glow::RED_INTEGER, glow::UNSIGNED_SHORT),
+            Tf::R16Sint => (glow::R16I, glow::RED_INTEGER, glow::SHORT),
+            Tf::R16Unorm => (glow::R16, glow::RED, glow::UNSIGNED_SHORT),
+            Tf::R16Snorm => (glow::R16_SNORM, glow::RED, glow::SHORT),
+            Tf::R16Float => (glow::R16F, glow::RED, glow::HALF_FLOAT),
+            Tf::Rg8Unorm => (glow::RG8, glow::RG, glow::UNSIGNED_BYTE),
+            Tf::Rg8Snorm => (glow::RG8_SNORM, glow::RG, glow::BYTE),
+            Tf::Rg8Uint => (glow::RG8UI, glow::RG_INTEGER, glow::UNSIGNED_BYTE),
+            Tf::Rg8Sint => (glow::RG8I, glow::RG_INTEGER, glow::BYTE),
+            Tf::R32Uint => (glow::R32UI, glow::RED_INTEGER, glow::UNSIGNED_INT),
+            Tf::R32Sint => (glow::R32I, glow::RED_INTEGER, glow::INT),
+            Tf::R32Float => (glow::R32F, glow::RED, glow::FLOAT),
+            Tf::Rg16Uint => (glow::RG16UI, glow::RG_INTEGER, glow::UNSIGNED_SHORT),
+            Tf::Rg16Sint => (glow::RG16I, glow::RG_INTEGER, glow::SHORT),
+            Tf::Rg16Unorm => (glow::RG16, glow::RG, glow::UNSIGNED_SHORT),
+            Tf::Rg16Snorm => (glow::RG16_SNORM, glow::RG, glow::SHORT),
+            Tf::Rg16Float => (glow::RG16F, glow::RG, glow::HALF_FLOAT),
+            Tf::Rgba8Unorm => (glow::RGBA8, glow::RGBA, glow::UNSIGNED_BYTE),
+            Tf::Rgba8UnormSrgb => (glow::SRGB8_ALPHA8, glow::RGBA, glow::UNSIGNED_BYTE),
+            Tf::Bgra8UnormSrgb => (glow::SRGB8_ALPHA8, glow::BGRA, glow::UNSIGNED_BYTE), //TODO?
+            Tf::Rgba8Snorm => (glow::RGBA8_SNORM, glow::RGBA, glow::BYTE),
+            Tf::Bgra8Unorm => (glow::RGBA8, glow::BGRA, glow::UNSIGNED_BYTE), //TODO?
+            Tf::Rgba8Uint => (glow::RGBA8UI, glow::RGBA_INTEGER, glow::UNSIGNED_BYTE),
+            Tf::Rgba8Sint => (glow::RGBA8I, glow::RGBA_INTEGER, glow::BYTE),
+            Tf::Rgb10a2Unorm => (
+                glow::RGB10_A2,
+                glow::RGBA,
+                glow::UNSIGNED_INT_2_10_10_10_REV,
+            ),
+            Tf::Rg11b10Float => (
+                glow::R11F_G11F_B10F,
+                glow::RGB,
+                glow::UNSIGNED_INT_10F_11F_11F_REV,
+            ),
+            Tf::Rg32Uint => (glow::RG32UI, glow::RG_INTEGER, glow::UNSIGNED_INT),
+            Tf::Rg32Sint => (glow::RG32I, glow::RG_INTEGER, glow::INT),
+            Tf::Rg32Float => (glow::RG32F, glow::RG, glow::FLOAT),
+            Tf::Rgba16Uint => (glow::RGBA16UI, glow::RGBA_INTEGER, glow::UNSIGNED_SHORT),
+            Tf::Rgba16Sint => (glow::RGBA16I, glow::RGBA_INTEGER, glow::SHORT),
+            Tf::Rgba16Unorm => (glow::RGBA16, glow::RGBA, glow::UNSIGNED_SHORT),
+            Tf::Rgba16Snorm => (glow::RGBA16_SNORM, glow::RGBA, glow::SHORT),
+            Tf::Rgba16Float => (glow::RGBA16F, glow::RGBA, glow::HALF_FLOAT),
+            Tf::Rgba32Uint => (glow::RGBA32UI, glow::RGBA_INTEGER, glow::UNSIGNED_INT),
+            Tf::Rgba32Sint => (glow::RGBA32I, glow::RGBA_INTEGER, glow::INT),
+            Tf::Rgba32Float => (glow::RGBA32F, glow::RGBA, glow::FLOAT),
+            Tf::Stencil8 => (
+                glow::STENCIL_INDEX8,
+                glow::STENCIL_COMPONENTS,
+                glow::UNSIGNED_BYTE,
+            ),
+            Tf::Depth16Unorm => (
+                glow::DEPTH_COMPONENT16,
+                glow::DEPTH_COMPONENT,
+                glow::UNSIGNED_SHORT,
+            ),
+            Tf::Depth32Float => (glow::DEPTH_COMPONENT32F, glow::DEPTH_COMPONENT, glow::FLOAT),
+            Tf::Depth32FloatStencil8 => {
+                (glow::DEPTH32F_STENCIL8, glow::DEPTH_COMPONENT, glow::FLOAT)
+            }
+            Tf::Depth24Plus => (
+                glow::DEPTH_COMPONENT24,
+                glow::DEPTH_COMPONENT,
+                glow::UNSIGNED_NORMALIZED,
+            ),
+            Tf::Depth24PlusStencil8 => (
+                glow::DEPTH24_STENCIL8,
+                glow::DEPTH_COMPONENT,
+                glow::UNSIGNED_INT,
+            ),
+            Tf::Rgb9e5Ufloat => (glow::RGB9_E5, glow::RGB, glow::UNSIGNED_INT_5_9_9_9_REV),
+            Tf::Bc1RgbaUnorm => (glow::COMPRESSED_RGBA_S3TC_DXT1_EXT, glow::RGBA, 0),
+            Tf::Bc1RgbaUnormSrgb => (glow::COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT, glow::RGBA, 0),
+            Tf::Bc2RgbaUnorm => (glow::COMPRESSED_RGBA_S3TC_DXT3_EXT, glow::RGBA, 0),
+            Tf::Bc2RgbaUnormSrgb => (glow::COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT, glow::RGBA, 0),
+            Tf::Bc3RgbaUnorm => (glow::COMPRESSED_RGBA_S3TC_DXT5_EXT, glow::RGBA, 0),
+            Tf::Bc3RgbaUnormSrgb => (glow::COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT, glow::RGBA, 0),
+            Tf::Bc4RUnorm => (glow::COMPRESSED_RED_RGTC1, glow::RED, 0),
+            Tf::Bc4RSnorm => (glow::COMPRESSED_SIGNED_RED_RGTC1, glow::RED, 0),
+            Tf::Bc5RgUnorm => (glow::COMPRESSED_RG_RGTC2, glow::RG, 0),
+            Tf::Bc5RgSnorm => (glow::COMPRESSED_SIGNED_RG_RGTC2, glow::RG, 0),
+            Tf::Bc6hRgbUfloat => (glow::COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT, glow::RGB, 0),
+            Tf::Bc6hRgbSfloat => (glow::COMPRESSED_RGB_BPTC_SIGNED_FLOAT, glow::RGB, 0),
+            Tf::Bc7RgbaUnorm => (glow::COMPRESSED_RGBA_BPTC_UNORM, glow::RGBA, 0),
+            Tf::Bc7RgbaUnormSrgb => (glow::COMPRESSED_SRGB_ALPHA_BPTC_UNORM, glow::RGBA, 0),
+            Tf::Etc2Rgb8Unorm => (glow::COMPRESSED_RGB8_ETC2, glow::RGB, 0),
+            Tf::Etc2Rgb8UnormSrgb => (glow::COMPRESSED_SRGB8_ETC2, glow::RGB, 0),
+            Tf::Etc2Rgb8A1Unorm => (
+                glow::COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2,
+                glow::RGBA,
+                0,
+            ),
+            Tf::Etc2Rgb8A1UnormSrgb => (
+                glow::COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2,
+                glow::RGBA,
+                0,
+            ),
+            Tf::Etc2Rgba8Unorm => (
+                //TODO: this is a lie, it's not sRGB
+                glow::COMPRESSED_SRGB8_ALPHA8_ETC2_EAC,
+                glow::RGBA,
+                0,
+            ),
+            Tf::Etc2Rgba8UnormSrgb => (glow::COMPRESSED_SRGB8_ALPHA8_ETC2_EAC, glow::RGBA, 0),
+            Tf::EacR11Unorm => (glow::COMPRESSED_R11_EAC, glow::RED, 0),
+            Tf::EacR11Snorm => (glow::COMPRESSED_SIGNED_R11_EAC, glow::RED, 0),
+            Tf::EacRg11Unorm => (glow::COMPRESSED_RG11_EAC, glow::RG, 0),
+            Tf::EacRg11Snorm => (glow::COMPRESSED_SIGNED_RG11_EAC, glow::RG, 0),
+            Tf::Astc { block, channel } => match channel {
+                AstcChannel::Unorm | AstcChannel::Hdr => match block {
+                    AstcBlock::B4x4 => (glow::COMPRESSED_RGBA_ASTC_4x4_KHR, glow::RGBA, 0),
+                    AstcBlock::B5x4 => (glow::COMPRESSED_RGBA_ASTC_5x4_KHR, glow::RGBA, 0),
+                    AstcBlock::B5x5 => (glow::COMPRESSED_RGBA_ASTC_5x5_KHR, glow::RGBA, 0),
+                    AstcBlock::B6x5 => (glow::COMPRESSED_RGBA_ASTC_6x5_KHR, glow::RGBA, 0),
+                    AstcBlock::B6x6 => (glow::COMPRESSED_RGBA_ASTC_6x6_KHR, glow::RGBA, 0),
+                    AstcBlock::B8x5 => (glow::COMPRESSED_RGBA_ASTC_8x5_KHR, glow::RGBA, 0),
+                    AstcBlock::B8x6 => (glow::COMPRESSED_RGBA_ASTC_8x6_KHR, glow::RGBA, 0),
+                    AstcBlock::B8x8 => (glow::COMPRESSED_RGBA_ASTC_8x8_KHR, glow::RGBA, 0),
+                    AstcBlock::B10x5 => (glow::COMPRESSED_RGBA_ASTC_10x5_KHR, glow::RGBA, 0),
+                    AstcBlock::B10x6 => (glow::COMPRESSED_RGBA_ASTC_10x6_KHR, glow::RGBA, 0),
+                    AstcBlock::B10x8 => (glow::COMPRESSED_RGBA_ASTC_10x8_KHR, glow::RGBA, 0),
+                    AstcBlock::B10x10 => (glow::COMPRESSED_RGBA_ASTC_10x10_KHR, glow::RGBA, 0),
+                    AstcBlock::B12x10 => (glow::COMPRESSED_RGBA_ASTC_12x10_KHR, glow::RGBA, 0),
+                    AstcBlock::B12x12 => (glow::COMPRESSED_RGBA_ASTC_12x12_KHR, glow::RGBA, 0),
+                },
+                AstcChannel::UnormSrgb => match block {
+                    AstcBlock::B4x4 => (glow::COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR, glow::RGBA, 0),
+                    AstcBlock::B5x4 => (glow::COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR, glow::RGBA, 0),
+                    AstcBlock::B5x5 => (glow::COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR, glow::RGBA, 0),
+                    AstcBlock::B6x5 => (glow::COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR, glow::RGBA, 0),
+                    AstcBlock::B6x6 => (glow::COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR, glow::RGBA, 0),
+                    AstcBlock::B8x5 => (glow::COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR, glow::RGBA, 0),
+                    AstcBlock::B8x6 => (glow::COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR, glow::RGBA, 0),
+                    AstcBlock::B8x8 => (glow::COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR, glow::RGBA, 0),
+                    AstcBlock::B10x5 => {
+                        (glow::COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR, glow::RGBA, 0)
+                    }
+                    AstcBlock::B10x6 => {
+                        (glow::COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR, glow::RGBA, 0)
+                    }
+                    AstcBlock::B10x8 => {
+                        (glow::COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR, glow::RGBA, 0)
+                    }
+                    AstcBlock::B10x10 => {
+                        (glow::COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR, glow::RGBA, 0)
+                    }
+                    AstcBlock::B12x10 => {
+                        (glow::COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR, glow::RGBA, 0)
+                    }
+                    AstcBlock::B12x12 => {
+                        (glow::COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR, glow::RGBA, 0)
+                    }
+                },
+            },
+        };
+
+        super::TextureFormatDesc {
+            internal,
+            external,
+            data_type,
+        }
+    }
+}
+
+pub(super) fn describe_vertex_format(vertex_format: wgt::VertexFormat) -> super::VertexFormatDesc {
+    use super::VertexAttribKind as Vak;
+    use wgt::VertexFormat as Vf;
+
+    let (element_count, element_format, attrib_kind) = match vertex_format {
+        Vf::Unorm8x2 => (2, glow::UNSIGNED_BYTE, Vak::Float),
+        Vf::Snorm8x2 => (2, glow::BYTE, Vak::Float),
+        Vf::Uint8x2 => (2, glow::UNSIGNED_BYTE, Vak::Integer),
+        Vf::Sint8x2 => (2, glow::BYTE, Vak::Integer),
+        Vf::Unorm8x4 => (4, glow::UNSIGNED_BYTE, Vak::Float),
+        Vf::Snorm8x4 => (4, glow::BYTE, Vak::Float),
+        Vf::Uint8x4 => (4, glow::UNSIGNED_BYTE, Vak::Integer),
+        Vf::Sint8x4 => (4, glow::BYTE, Vak::Integer),
+        Vf::Unorm16x2 => (2, glow::UNSIGNED_SHORT, Vak::Float),
+        Vf::Snorm16x2 => (2, glow::SHORT, Vak::Float),
+        Vf::Uint16x2 => (2, glow::UNSIGNED_SHORT, Vak::Integer),
+        Vf::Sint16x2 => (2, glow::SHORT, Vak::Integer),
+        Vf::Float16x2 => (2, glow::HALF_FLOAT, Vak::Float),
+        Vf::Unorm16x4 => (4, glow::UNSIGNED_SHORT, Vak::Float),
+        Vf::Snorm16x4 => (4, glow::SHORT, Vak::Float),
+        Vf::Uint16x4 => (4, glow::UNSIGNED_SHORT, Vak::Integer),
+        Vf::Sint16x4 => (4, glow::SHORT, Vak::Integer),
+        Vf::Float16x4 => (4, glow::HALF_FLOAT, Vak::Float),
+        Vf::Uint32 => (1, glow::UNSIGNED_INT, Vak::Integer),
+        Vf::Sint32 => (1, glow::INT, Vak::Integer),
+        Vf::Float32 => (1, glow::FLOAT, Vak::Float),
+        Vf::Uint32x2 => (2, glow::UNSIGNED_INT, Vak::Integer),
+        Vf::Sint32x2 => (2, glow::INT, Vak::Integer),
+        Vf::Float32x2 => (2, glow::FLOAT, Vak::Float),
+        Vf::Uint32x3 => (3, glow::UNSIGNED_INT, Vak::Integer),
+        Vf::Sint32x3 => (3, glow::INT, Vak::Integer),
+        Vf::Float32x3 => (3, glow::FLOAT, Vak::Float),
+        Vf::Uint32x4 => (4, glow::UNSIGNED_INT, Vak::Integer),
+        Vf::Sint32x4 => (4, glow::INT, Vak::Integer),
+        Vf::Float32x4 => (4, glow::FLOAT, Vak::Float),
+        Vf::Float64 | Vf::Float64x2 | Vf::Float64x3 | Vf::Float64x4 => unimplemented!(),
+    };
+
+    super::VertexFormatDesc {
+        element_count,
+        element_format,
+        attrib_kind,
+    }
+}
+
+pub fn map_filter_modes(
+    min: wgt::FilterMode,
+    mag: wgt::FilterMode,
+    mip: wgt::FilterMode,
+) -> (u32, u32) {
+    use wgt::FilterMode as Fm;
+
+    let mag_filter = match mag {
+        Fm::Nearest => glow::NEAREST,
+        Fm::Linear => glow::LINEAR,
+    };
+
+    let min_filter = match (min, mip) {
+        (Fm::Nearest, Fm::Nearest) => glow::NEAREST_MIPMAP_NEAREST,
+        (Fm::Nearest, Fm::Linear) => glow::NEAREST_MIPMAP_LINEAR,
+        (Fm::Linear, Fm::Nearest) => glow::LINEAR_MIPMAP_NEAREST,
+        (Fm::Linear, Fm::Linear) => glow::LINEAR_MIPMAP_LINEAR,
+    };
+
+    (min_filter, mag_filter)
+}
+
+pub fn map_address_mode(mode: wgt::AddressMode) -> u32 {
+    match mode {
+        wgt::AddressMode::Repeat => glow::REPEAT,
+        wgt::AddressMode::MirrorRepeat => glow::MIRRORED_REPEAT,
+        wgt::AddressMode::ClampToEdge => glow::CLAMP_TO_EDGE,
+        wgt::AddressMode::ClampToBorder => glow::CLAMP_TO_BORDER,
+        //wgt::AddressMode::MirrorClamp => glow::MIRROR_CLAMP_TO_EDGE,
+    }
+}
+
+pub fn map_compare_func(fun: wgt::CompareFunction) -> u32 {
+    use wgt::CompareFunction as Cf;
+    match fun {
+        Cf::Never => glow::NEVER,
+        Cf::Less => glow::LESS,
+        Cf::LessEqual => glow::LEQUAL,
+        Cf::Equal => glow::EQUAL,
+        Cf::GreaterEqual => glow::GEQUAL,
+        Cf::Greater => glow::GREATER,
+        Cf::NotEqual => glow::NOTEQUAL,
+        Cf::Always => glow::ALWAYS,
+    }
+}
+
+pub fn map_primitive_topology(topology: wgt::PrimitiveTopology) -> u32 {
+    use wgt::PrimitiveTopology as Pt;
+    match topology {
+        Pt::PointList => glow::POINTS,
+        Pt::LineList => glow::LINES,
+        Pt::LineStrip => glow::LINE_STRIP,
+        Pt::TriangleList => glow::TRIANGLES,
+        Pt::TriangleStrip => glow::TRIANGLE_STRIP,
+    }
+}
+
+pub(super) fn map_primitive_state(state: &wgt::PrimitiveState) -> super::PrimitiveState {
+    //Note: state.polygon_mode is not supported, see `Features::POLYGON_MODE_LINE` and
+    //`Features::POLYGON_MODE_POINT`
+    super::PrimitiveState {
+        //Note: we are flipping the front face, so that
+        // the Y-flip in the generated GLSL keeps the same visibility.
+        // See `naga::back::glsl::WriterFlags::ADJUST_COORDINATE_SPACE`.
+        front_face: match state.front_face {
+            wgt::FrontFace::Cw => glow::CCW,
+            wgt::FrontFace::Ccw => glow::CW,
+        },
+        cull_face: match state.cull_mode {
+            Some(wgt::Face::Front) => glow::FRONT,
+            Some(wgt::Face::Back) => glow::BACK,
+            None => 0,
+        },
+        unclipped_depth: state.unclipped_depth,
+    }
+}
+
+pub fn _map_view_dimension(dim: wgt::TextureViewDimension) -> u32 {
+    use wgt::TextureViewDimension as Tvd;
+    match dim {
+        Tvd::D1 | Tvd::D2 => glow::TEXTURE_2D,
+        Tvd::D2Array => glow::TEXTURE_2D_ARRAY,
+        Tvd::Cube => glow::TEXTURE_CUBE_MAP,
+        Tvd::CubeArray => glow::TEXTURE_CUBE_MAP_ARRAY,
+        Tvd::D3 => glow::TEXTURE_3D,
+    }
+}
+
+fn map_stencil_op(operation: wgt::StencilOperation) -> u32 {
+    use wgt::StencilOperation as So;
+    match operation {
+        So::Keep => glow::KEEP,
+        So::Zero => glow::ZERO,
+        So::Replace => glow::REPLACE,
+        So::Invert => glow::INVERT,
+        So::IncrementClamp => glow::INCR,
+        So::DecrementClamp => glow::DECR,
+        So::IncrementWrap => glow::INCR_WRAP,
+        So::DecrementWrap => glow::DECR_WRAP,
+    }
+}
+
+fn map_stencil_ops(face: &wgt::StencilFaceState) -> super::StencilOps {
+    super::StencilOps {
+        pass: map_stencil_op(face.pass_op),
+        fail: map_stencil_op(face.fail_op),
+        depth_fail: map_stencil_op(face.depth_fail_op),
+    }
+}
+
+pub(super) fn map_stencil(state: &wgt::StencilState) -> super::StencilState {
+    super::StencilState {
+        front: super::StencilSide {
+            function: map_compare_func(state.front.compare),
+            mask_read: state.read_mask,
+            mask_write: state.write_mask,
+            reference: 0,
+            ops: map_stencil_ops(&state.front),
+        },
+        back: super::StencilSide {
+            function: map_compare_func(state.back.compare),
+            mask_read: state.read_mask,
+            mask_write: state.write_mask,
+            reference: 0,
+            ops: map_stencil_ops(&state.back),
+        },
+    }
+}
+
+fn map_blend_factor(factor: wgt::BlendFactor) -> u32 {
+    use wgt::BlendFactor as Bf;
+    match factor {
+        Bf::Zero => glow::ZERO,
+        Bf::One => glow::ONE,
+        Bf::Src => glow::SRC_COLOR,
+        Bf::OneMinusSrc => glow::ONE_MINUS_SRC_COLOR,
+        Bf::Dst => glow::DST_COLOR,
+        Bf::OneMinusDst => glow::ONE_MINUS_DST_COLOR,
+        Bf::SrcAlpha => glow::SRC_ALPHA,
+        Bf::OneMinusSrcAlpha => glow::ONE_MINUS_SRC_ALPHA,
+        Bf::DstAlpha => glow::DST_ALPHA,
+        Bf::OneMinusDstAlpha => glow::ONE_MINUS_DST_ALPHA,
+        Bf::Constant => glow::CONSTANT_COLOR,
+        Bf::OneMinusConstant => glow::ONE_MINUS_CONSTANT_COLOR,
+        Bf::SrcAlphaSaturated => glow::SRC_ALPHA_SATURATE,
+    }
+}
+
+fn map_blend_component(component: &wgt::BlendComponent) -> super::BlendComponent {
+    super::BlendComponent {
+        src: map_blend_factor(component.src_factor),
+        dst: map_blend_factor(component.dst_factor),
+        equation: match component.operation {
+            wgt::BlendOperation::Add => glow::FUNC_ADD,
+            wgt::BlendOperation::Subtract => glow::FUNC_SUBTRACT,
+            wgt::BlendOperation::ReverseSubtract => glow::FUNC_REVERSE_SUBTRACT,
+            wgt::BlendOperation::Min => glow::MIN,
+            wgt::BlendOperation::Max => glow::MAX,
+        },
+    }
+}
+
+pub(super) fn map_blend(blend: &wgt::BlendState) -> super::BlendDesc {
+    super::BlendDesc {
+        color: map_blend_component(&blend.color),
+        alpha: map_blend_component(&blend.alpha),
+    }
+}
+
+pub(super) fn map_storage_access(access: wgt::StorageTextureAccess) -> u32 {
+    match access {
+        wgt::StorageTextureAccess::ReadOnly => glow::READ_ONLY,
+        wgt::StorageTextureAccess::WriteOnly => glow::WRITE_ONLY,
+        wgt::StorageTextureAccess::ReadWrite => glow::READ_WRITE,
+    }
+}
+
+pub(super) fn is_sampler(glsl_uniform_type: u32) -> bool {
+    match glsl_uniform_type {
+        glow::INT_SAMPLER_1D
+        | glow::INT_SAMPLER_1D_ARRAY
+        | glow::INT_SAMPLER_2D
+        | glow::INT_SAMPLER_2D_ARRAY
+        | glow::INT_SAMPLER_2D_MULTISAMPLE
+        | glow::INT_SAMPLER_2D_MULTISAMPLE_ARRAY
+        | glow::INT_SAMPLER_2D_RECT
+        | glow::INT_SAMPLER_3D
+        | glow::INT_SAMPLER_CUBE
+        | glow::INT_SAMPLER_CUBE_MAP_ARRAY
+        | glow::UNSIGNED_INT_SAMPLER_1D
+        | glow::UNSIGNED_INT_SAMPLER_1D_ARRAY
+        | glow::UNSIGNED_INT_SAMPLER_2D
+        | glow::UNSIGNED_INT_SAMPLER_2D_ARRAY
+        | glow::UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE
+        | glow::UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE_ARRAY
+        | glow::UNSIGNED_INT_SAMPLER_2D_RECT
+        | glow::UNSIGNED_INT_SAMPLER_3D
+        | glow::UNSIGNED_INT_SAMPLER_CUBE
+        | glow::UNSIGNED_INT_SAMPLER_CUBE_MAP_ARRAY
+        | glow::SAMPLER_1D
+        | glow::SAMPLER_1D_SHADOW
+        | glow::SAMPLER_1D_ARRAY
+        | glow::SAMPLER_1D_ARRAY_SHADOW
+        | glow::SAMPLER_2D
+        | glow::SAMPLER_2D_SHADOW
+        | glow::SAMPLER_2D_ARRAY
+        | glow::SAMPLER_2D_ARRAY_SHADOW
+        | glow::SAMPLER_2D_MULTISAMPLE
+        | glow::SAMPLER_2D_MULTISAMPLE_ARRAY
+        | glow::SAMPLER_2D_RECT
+        | glow::SAMPLER_2D_RECT_SHADOW
+        | glow::SAMPLER_3D
+        | glow::SAMPLER_CUBE
+        | glow::SAMPLER_CUBE_MAP_ARRAY
+        | glow::SAMPLER_CUBE_MAP_ARRAY_SHADOW
+        | glow::SAMPLER_CUBE_SHADOW => true,
+        _ => false,
+    }
+}
+
+pub(super) fn uniform_byte_size(glsl_uniform_type: u32) -> u32 {
+    match glsl_uniform_type {
+        glow::FLOAT | glow::INT => 4,
+        glow::FLOAT_VEC2 | glow::INT_VEC2 => 8,
+        glow::FLOAT_VEC3 | glow::INT_VEC3 => 12,
+        glow::FLOAT_VEC4 | glow::INT_VEC4 => 16,
+        glow::FLOAT_MAT2 => 16,
+        glow::FLOAT_MAT3 => 36,
+        glow::FLOAT_MAT4 => 64,
+        _ => panic!("Unsupported uniform datatype!"),
+    }
+}