kc3-lang/angle/src/image_util/imageformats.h

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• Author : Alexis Hetu
  Date : 2021-09-17 16:22:55
  Hash : c0aa6108
  Message : Add new GL_RGBX8_ANGLEX format Currently, IOSurface objects using {GL_RGB, GL_UNSIGNED_BYTE} are natively represented with GL_BGRX8_ANGLEX, which we use instead of other RGBA formats in order to avoid issues when a canvas uses 'no alpha': https://source.chromium.org/chromium/chromium/src/+/main:third_party/swiftshader/third_party/angle/angle/src/libANGLE/renderer/vulkan/mac/IOSurfaceSurfaceVkMac.mm;l=44 This unfortunately causes some other issues because of the implicit RGB <-> BGR conversion like type mismatches in subresource updates. This CL adds a new type, RGBX8, which will be usable by IOSurface objects and which behaves exactly like the BGRX8 format with the B and R channels flipped. Bug: chromium:1209250 Change-Id: I345eadc8addd05a0964cae30d89c20005479e37b Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3188910 Commit-Queue: Alexis Hétu <sugoi@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>

• src/image_util/imageformats.h

• //
  // Copyright 2013 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  // imageformats.h: Defines image format types with functions for mip generation
  // and copying.
  
  #ifndef IMAGEUTIL_IMAGEFORMATS_H_
  #define IMAGEUTIL_IMAGEFORMATS_H_
  
  #include "common/Color.h"
  
  #include <cstdint>
  
  namespace angle
  {
  
  // Several structures share functionality for reading, writing or mipmapping but the layout
  // must match the texture format which the structure represents. If collapsing or typedefing
  // structs in this header, make sure the functionality and memory layout is exactly the same.
  
  struct L8
  {
      uint8_t L;
  
      static void readColor(gl::ColorF *dst, const L8 *src);
      static void writeColor(L8 *dst, const gl::ColorF *src);
      static void average(L8 *dst, const L8 *src1, const L8 *src2);
  };
  
  struct R8
  {
      uint8_t R;
  
      static void readColor(gl::ColorF *dst, const R8 *src);
      static void readColor(gl::ColorUI *dst, const R8 *src);
      static void writeColor(R8 *dst, const gl::ColorF *src);
      static void writeColor(R8 *dst, const gl::ColorUI *src);
      static void average(R8 *dst, const R8 *src1, const R8 *src2);
  };
  
  struct A8
  {
      uint8_t A;
  
      static void readColor(gl::ColorF *dst, const A8 *src);
      static void writeColor(A8 *dst, const gl::ColorF *src);
      static void average(A8 *dst, const A8 *src1, const A8 *src2);
  };
  
  struct L8A8
  {
      uint8_t L;
      uint8_t A;
  
      static void readColor(gl::ColorF *dst, const L8A8 *src);
      static void writeColor(L8A8 *dst, const gl::ColorF *src);
      static void average(L8A8 *dst, const L8A8 *src1, const L8A8 *src2);
  };
  
  struct A8L8
  {
      uint8_t A;
      uint8_t L;
  
      static void readColor(gl::ColorF *dst, const A8L8 *src);
      static void writeColor(A8L8 *dst, const gl::ColorF *src);
      static void average(A8L8 *dst, const A8L8 *src1, const A8L8 *src2);
  };
  
  struct R8G8
  {
      uint8_t R;
      uint8_t G;
  
      static void readColor(gl::ColorF *dst, const R8G8 *src);
      static void readColor(gl::ColorUI *dst, const R8G8 *src);
      static void writeColor(R8G8 *dst, const gl::ColorF *src);
      static void writeColor(R8G8 *dst, const gl::ColorUI *src);
      static void average(R8G8 *dst, const R8G8 *src1, const R8G8 *src2);
  };
  
  struct R8G8B8
  {
      uint8_t R;
      uint8_t G;
      uint8_t B;
  
      static void readColor(gl::ColorF *dst, const R8G8B8 *src);
      static void readColor(gl::ColorUI *dst, const R8G8B8 *src);
      static void writeColor(R8G8B8 *dst, const gl::ColorF *src);
      static void writeColor(R8G8B8 *dst, const gl::ColorUI *src);
      static void average(R8G8B8 *dst, const R8G8B8 *src1, const R8G8B8 *src2);
  };
  
  struct B8G8R8
  {
      uint8_t B;
      uint8_t G;
      uint8_t R;
  
      static void readColor(gl::ColorF *dst, const B8G8R8 *src);
      static void readColor(gl::ColorUI *dst, const B8G8R8 *src);
      static void writeColor(B8G8R8 *dst, const gl::ColorF *src);
      static void writeColor(B8G8R8 *dst, const gl::ColorUI *src);
      static void average(B8G8R8 *dst, const B8G8R8 *src1, const B8G8R8 *src2);
  };
  
  struct R5G6B5
  {
      // OpenGL ES 2.0.25 spec Section 3.6.2: "Components are packed with the first component in the
      // most significant bits of the bitfield, and successive component occupying progressively less
      // significant locations"
      uint16_t RGB;
  
      static void readColor(gl::ColorF *dst, const R5G6B5 *src);
      static void writeColor(R5G6B5 *dst, const gl::ColorF *src);
      static void average(R5G6B5 *dst, const R5G6B5 *src1, const R5G6B5 *src2);
  };
  
  struct B5G6R5
  {
      uint16_t BGR;
  
      static void readColor(gl::ColorF *dst, const B5G6R5 *src);
      static void writeColor(B5G6R5 *dst, const gl::ColorF *src);
      static void average(B5G6R5 *dst, const B5G6R5 *src1, const B5G6R5 *src2);
  };
  
  struct A8R8G8B8
  {
      uint8_t A;
      uint8_t R;
      uint8_t G;
      uint8_t B;
  
      static void readColor(gl::ColorF *dst, const A8R8G8B8 *src);
      static void readColor(gl::ColorUI *dst, const A8R8G8B8 *src);
      static void writeColor(A8R8G8B8 *dst, const gl::ColorF *src);
      static void writeColor(A8R8G8B8 *dst, const gl::ColorUI *src);
      static void average(A8R8G8B8 *dst, const A8R8G8B8 *src1, const A8R8G8B8 *src2);
  };
  
  struct R8G8B8A8
  {
      uint8_t R;
      uint8_t G;
      uint8_t B;
      uint8_t A;
  
      static void readColor(gl::ColorF *dst, const R8G8B8A8 *src);
      static void readColor(gl::ColorUI *dst, const R8G8B8A8 *src);
      static void writeColor(R8G8B8A8 *dst, const gl::ColorF *src);
      static void writeColor(R8G8B8A8 *dst, const gl::ColorUI *src);
      static void average(R8G8B8A8 *dst, const R8G8B8A8 *src1, const R8G8B8A8 *src2);
  };
  
  struct R8G8B8A8SRGB
  {
      uint8_t R;
      uint8_t G;
      uint8_t B;
      uint8_t A;
  
      static void readColor(gl::ColorF *dst, const R8G8B8A8SRGB *src);
      static void writeColor(R8G8B8A8SRGB *dst, const gl::ColorF *src);
      static void average(R8G8B8A8SRGB *dst, const R8G8B8A8SRGB *src1, const R8G8B8A8SRGB *src2);
  };
  
  struct B8G8R8A8
  {
      uint8_t B;
      uint8_t G;
      uint8_t R;
      uint8_t A;
  
      static void readColor(gl::ColorF *dst, const B8G8R8A8 *src);
      static void readColor(gl::ColorUI *dst, const B8G8R8A8 *src);
      static void writeColor(B8G8R8A8 *dst, const gl::ColorF *src);
      static void writeColor(B8G8R8A8 *dst, const gl::ColorUI *src);
      static void average(B8G8R8A8 *dst, const B8G8R8A8 *src1, const B8G8R8A8 *src2);
  };
  
  struct B8G8R8X8
  {
      uint8_t B;
      uint8_t G;
      uint8_t R;
      uint8_t X;
  
      static void readColor(gl::ColorF *dst, const B8G8R8X8 *src);
      static void readColor(gl::ColorUI *dst, const B8G8R8X8 *src);
      static void writeColor(B8G8R8X8 *dst, const gl::ColorF *src);
      static void writeColor(B8G8R8X8 *dst, const gl::ColorUI *src);
      static void average(B8G8R8X8 *dst, const B8G8R8X8 *src1, const B8G8R8X8 *src2);
  };
  
  struct R8G8B8X8
  {
      uint8_t R;
      uint8_t G;
      uint8_t B;
      uint8_t X;
  
      static void readColor(gl::ColorF *dst, const R8G8B8X8 *src);
      static void readColor(gl::ColorUI *dst, const R8G8B8X8 *src);
      static void writeColor(R8G8B8X8 *dst, const gl::ColorF *src);
      static void writeColor(R8G8B8X8 *dst, const gl::ColorUI *src);
      static void average(R8G8B8X8 *dst, const R8G8B8X8 *src1, const R8G8B8X8 *src2);
  };
  
  struct A1R5G5B5
  {
      uint16_t ARGB;
  
      static void readColor(gl::ColorF *dst, const A1R5G5B5 *src);
      static void writeColor(A1R5G5B5 *dst, const gl::ColorF *src);
      static void average(A1R5G5B5 *dst, const A1R5G5B5 *src1, const A1R5G5B5 *src2);
  };
  
  struct R5G5B5A1
  {
      // OpenGL ES 2.0.25 spec Section 3.6.2: "Components are packed with the first component in the
      // most significant
      // bits of the bitfield, and successive component occupying progressively less significant
      // locations"
      uint16_t RGBA;
  
      static void readColor(gl::ColorF *dst, const R5G5B5A1 *src);
      static void writeColor(R5G5B5A1 *dst, const gl::ColorF *src);
      static void average(R5G5B5A1 *dst, const R5G5B5A1 *src1, const R5G5B5A1 *src2);
  };
  
  struct R4G4B4A4
  {
      // OpenGL ES 2.0.25 spec Section 3.6.2: "Components are packed with the first component in the
      // most significant
      // bits of the bitfield, and successive component occupying progressively less significant
      // locations"
      uint16_t RGBA;
  
      static void readColor(gl::ColorF *dst, const R4G4B4A4 *src);
      static void writeColor(R4G4B4A4 *dst, const gl::ColorF *src);
      static void average(R4G4B4A4 *dst, const R4G4B4A4 *src1, const R4G4B4A4 *src2);
  };
  
  struct A4R4G4B4
  {
      uint16_t ARGB;
  
      static void readColor(gl::ColorF *dst, const A4R4G4B4 *src);
      static void writeColor(A4R4G4B4 *dst, const gl::ColorF *src);
      static void average(A4R4G4B4 *dst, const A4R4G4B4 *src1, const A4R4G4B4 *src2);
  };
  
  struct R16
  {
      uint16_t R;
  
      static void readColor(gl::ColorF *dst, const R16 *src);
      static void readColor(gl::ColorUI *dst, const R16 *src);
      static void writeColor(R16 *dst, const gl::ColorF *src);
      static void writeColor(R16 *dst, const gl::ColorUI *src);
      static void average(R16 *dst, const R16 *src1, const R16 *src2);
  };
  
  struct R16G16
  {
      uint16_t R;
      uint16_t G;
  
      static void readColor(gl::ColorF *dst, const R16G16 *src);
      static void readColor(gl::ColorUI *dst, const R16G16 *src);
      static void writeColor(R16G16 *dst, const gl::ColorF *src);
      static void writeColor(R16G16 *dst, const gl::ColorUI *src);
      static void average(R16G16 *dst, const R16G16 *src1, const R16G16 *src2);
  };
  
  struct R16G16B16
  {
      uint16_t R;
      uint16_t G;
      uint16_t B;
  
      static void readColor(gl::ColorF *dst, const R16G16B16 *src);
      static void readColor(gl::ColorUI *dst, const R16G16B16 *src);
      static void writeColor(R16G16B16 *dst, const gl::ColorF *src);
      static void writeColor(R16G16B16 *dst, const gl::ColorUI *src);
      static void average(R16G16B16 *dst, const R16G16B16 *src1, const R16G16B16 *src2);
  };
  
  struct R16G16B16A16
  {
      uint16_t R;
      uint16_t G;
      uint16_t B;
      uint16_t A;
  
      static void readColor(gl::ColorF *dst, const R16G16B16A16 *src);
      static void readColor(gl::ColorUI *dst, const R16G16B16A16 *src);
      static void writeColor(R16G16B16A16 *dst, const gl::ColorF *src);
      static void writeColor(R16G16B16A16 *dst, const gl::ColorUI *src);
      static void average(R16G16B16A16 *dst, const R16G16B16A16 *src1, const R16G16B16A16 *src2);
  };
  
  struct R32
  {
      uint32_t R;
  
      static void readColor(gl::ColorF *dst, const R32 *src);
      static void readColor(gl::ColorUI *dst, const R32 *src);
      static void writeColor(R32 *dst, const gl::ColorF *src);
      static void writeColor(R32 *dst, const gl::ColorUI *src);
      static void average(R32 *dst, const R32 *src1, const R32 *src2);
  };
  
  struct R32G32
  {
      uint32_t R;
      uint32_t G;
  
      static void readColor(gl::ColorF *dst, const R32G32 *src);
      static void readColor(gl::ColorUI *dst, const R32G32 *src);
      static void writeColor(R32G32 *dst, const gl::ColorF *src);
      static void writeColor(R32G32 *dst, const gl::ColorUI *src);
      static void average(R32G32 *dst, const R32G32 *src1, const R32G32 *src2);
  };
  
  struct R32G32B32
  {
      uint32_t R;
      uint32_t G;
      uint32_t B;
  
      static void readColor(gl::ColorF *dst, const R32G32B32 *src);
      static void readColor(gl::ColorUI *dst, const R32G32B32 *src);
      static void writeColor(R32G32B32 *dst, const gl::ColorF *src);
      static void writeColor(R32G32B32 *dst, const gl::ColorUI *src);
      static void average(R32G32B32 *dst, const R32G32B32 *src1, const R32G32B32 *src2);
  };
  
  struct R32G32B32A32
  {
      uint32_t R;
      uint32_t G;
      uint32_t B;
      uint32_t A;
  
      static void readColor(gl::ColorF *dst, const R32G32B32A32 *src);
      static void readColor(gl::ColorUI *dst, const R32G32B32A32 *src);
      static void writeColor(R32G32B32A32 *dst, const gl::ColorF *src);
      static void writeColor(R32G32B32A32 *dst, const gl::ColorUI *src);
      static void average(R32G32B32A32 *dst, const R32G32B32A32 *src1, const R32G32B32A32 *src2);
  };
  
  struct R8S
  {
      int8_t R;
  
      static void readColor(gl::ColorF *dst, const R8S *src);
      static void readColor(gl::ColorI *dst, const R8S *src);
      static void writeColor(R8S *dst, const gl::ColorF *src);
      static void writeColor(R8S *dst, const gl::ColorI *src);
      static void average(R8S *dst, const R8S *src1, const R8S *src2);
  };
  
  struct R8G8S
  {
      int8_t R;
      int8_t G;
  
      static void readColor(gl::ColorF *dst, const R8G8S *src);
      static void readColor(gl::ColorI *dst, const R8G8S *src);
      static void writeColor(R8G8S *dst, const gl::ColorF *src);
      static void writeColor(R8G8S *dst, const gl::ColorI *src);
      static void average(R8G8S *dst, const R8G8S *src1, const R8G8S *src2);
  };
  
  struct R8G8B8S
  {
      int8_t R;
      int8_t G;
      int8_t B;
  
      static void readColor(gl::ColorF *dst, const R8G8B8S *src);
      static void readColor(gl::ColorI *dst, const R8G8B8S *src);
      static void writeColor(R8G8B8S *dst, const gl::ColorF *src);
      static void writeColor(R8G8B8S *dst, const gl::ColorI *src);
      static void average(R8G8B8S *dst, const R8G8B8S *src1, const R8G8B8S *src2);
  };
  
  struct R8G8B8A8S
  {
      int8_t R;
      int8_t G;
      int8_t B;
      int8_t A;
  
      static void readColor(gl::ColorF *dst, const R8G8B8A8S *src);
      static void readColor(gl::ColorI *dst, const R8G8B8A8S *src);
      static void writeColor(R8G8B8A8S *dst, const gl::ColorF *src);
      static void writeColor(R8G8B8A8S *dst, const gl::ColorI *src);
      static void average(R8G8B8A8S *dst, const R8G8B8A8S *src1, const R8G8B8A8S *src2);
  };
  
  struct R16S
  {
      int16_t R;
  
      static void readColor(gl::ColorF *dst, const R16S *src);
      static void readColor(gl::ColorI *dst, const R16S *src);
      static void writeColor(R16S *dst, const gl::ColorF *src);
      static void writeColor(R16S *dst, const gl::ColorI *src);
      static void average(R16S *dst, const R16S *src1, const R16S *src2);
  };
  
  struct R16G16S
  {
      int16_t R;
      int16_t G;
  
      static void readColor(gl::ColorF *dst, const R16G16S *src);
      static void readColor(gl::ColorI *dst, const R16G16S *src);
      static void writeColor(R16G16S *dst, const gl::ColorF *src);
      static void writeColor(R16G16S *dst, const gl::ColorI *src);
      static void average(R16G16S *dst, const R16G16S *src1, const R16G16S *src2);
  };
  
  struct R16G16B16S
  {
      int16_t R;
      int16_t G;
      int16_t B;
  
      static void readColor(gl::ColorF *dst, const R16G16B16S *src);
      static void readColor(gl::ColorI *dst, const R16G16B16S *src);
      static void writeColor(R16G16B16S *dst, const gl::ColorF *src);
      static void writeColor(R16G16B16S *dst, const gl::ColorI *src);
      static void average(R16G16B16S *dst, const R16G16B16S *src1, const R16G16B16S *src2);
  };
  
  struct R16G16B16A16S
  {
      int16_t R;
      int16_t G;
      int16_t B;
      int16_t A;
  
      static void readColor(gl::ColorF *dst, const R16G16B16A16S *src);
      static void readColor(gl::ColorI *dst, const R16G16B16A16S *src);
      static void writeColor(R16G16B16A16S *dst, const gl::ColorF *src);
      static void writeColor(R16G16B16A16S *dst, const gl::ColorI *src);
      static void average(R16G16B16A16S *dst, const R16G16B16A16S *src1, const R16G16B16A16S *src2);
  };
  
  struct R32S
  {
      int32_t R;
  
      static void readColor(gl::ColorF *dst, const R32S *src);
      static void readColor(gl::ColorI *dst, const R32S *src);
      static void writeColor(R32S *dst, const gl::ColorF *src);
      static void writeColor(R32S *dst, const gl::ColorI *src);
      static void average(R32S *dst, const R32S *src1, const R32S *src2);
  };
  
  struct R32G32S
  {
      int32_t R;
      int32_t G;
  
      static void readColor(gl::ColorF *dst, const R32G32S *src);
      static void readColor(gl::ColorI *dst, const R32G32S *src);
      static void writeColor(R32G32S *dst, const gl::ColorF *src);
      static void writeColor(R32G32S *dst, const gl::ColorI *src);
      static void average(R32G32S *dst, const R32G32S *src1, const R32G32S *src2);
  };
  
  struct R32G32B32S
  {
      int32_t R;
      int32_t G;
      int32_t B;
  
      static void readColor(gl::ColorF *dst, const R32G32B32S *src);
      static void readColor(gl::ColorI *dst, const R32G32B32S *src);
      static void writeColor(R32G32B32S *dst, const gl::ColorF *src);
      static void writeColor(R32G32B32S *dst, const gl::ColorI *src);
      static void average(R32G32B32S *dst, const R32G32B32S *src1, const R32G32B32S *src2);
  };
  
  struct R32G32B32A32S
  {
      int32_t R;
      int32_t G;
      int32_t B;
      int32_t A;
  
      static void readColor(gl::ColorF *dst, const R32G32B32A32S *src);
      static void readColor(gl::ColorI *dst, const R32G32B32A32S *src);
      static void writeColor(R32G32B32A32S *dst, const gl::ColorF *src);
      static void writeColor(R32G32B32A32S *dst, const gl::ColorI *src);
      static void average(R32G32B32A32S *dst, const R32G32B32A32S *src1, const R32G32B32A32S *src2);
  };
  
  struct A16B16G16R16F
  {
      uint16_t A;
      uint16_t R;
      uint16_t G;
      uint16_t B;
  
      static void readColor(gl::ColorF *dst, const A16B16G16R16F *src);
      static void writeColor(A16B16G16R16F *dst, const gl::ColorF *src);
      static void average(A16B16G16R16F *dst, const A16B16G16R16F *src1, const A16B16G16R16F *src2);
  };
  
  struct R16G16B16A16F
  {
      uint16_t R;
      uint16_t G;
      uint16_t B;
      uint16_t A;
  
      static void readColor(gl::ColorF *dst, const R16G16B16A16F *src);
      static void writeColor(R16G16B16A16F *dst, const gl::ColorF *src);
      static void average(R16G16B16A16F *dst, const R16G16B16A16F *src1, const R16G16B16A16F *src2);
  };
  
  struct R16F
  {
      uint16_t R;
  
      static void readColor(gl::ColorF *dst, const R16F *src);
      static void writeColor(R16F *dst, const gl::ColorF *src);
      static void average(R16F *dst, const R16F *src1, const R16F *src2);
  };
  
  struct A16F
  {
      uint16_t A;
  
      static void readColor(gl::ColorF *dst, const A16F *src);
      static void writeColor(A16F *dst, const gl::ColorF *src);
      static void average(A16F *dst, const A16F *src1, const A16F *src2);
  };
  
  struct L16F
  {
      uint16_t L;
  
      static void readColor(gl::ColorF *dst, const L16F *src);
      static void writeColor(L16F *dst, const gl::ColorF *src);
      static void average(L16F *dst, const L16F *src1, const L16F *src2);
  };
  
  struct L16A16F
  {
      uint16_t L;
      uint16_t A;
  
      static void readColor(gl::ColorF *dst, const L16A16F *src);
      static void writeColor(L16A16F *dst, const gl::ColorF *src);
      static void average(L16A16F *dst, const L16A16F *src1, const L16A16F *src2);
  };
  
  struct R16G16F
  {
      uint16_t R;
      uint16_t G;
  
      static void readColor(gl::ColorF *dst, const R16G16F *src);
      static void writeColor(R16G16F *dst, const gl::ColorF *src);
      static void average(R16G16F *dst, const R16G16F *src1, const R16G16F *src2);
  };
  
  struct R16G16B16F
  {
      uint16_t R;
      uint16_t G;
      uint16_t B;
  
      static void readColor(gl::ColorF *dst, const R16G16B16F *src);
      static void writeColor(R16G16B16F *dst, const gl::ColorF *src);
      static void average(R16G16B16F *dst, const R16G16B16F *src1, const R16G16B16F *src2);
  };
  
  struct A32B32G32R32F
  {
      float A;
      float R;
      float G;
      float B;
  
      static void readColor(gl::ColorF *dst, const A32B32G32R32F *src);
      static void writeColor(A32B32G32R32F *dst, const gl::ColorF *src);
      static void average(A32B32G32R32F *dst, const A32B32G32R32F *src1, const A32B32G32R32F *src2);
  };
  
  struct R32G32B32A32F
  {
      float R;
      float G;
      float B;
      float A;
  
      static void readColor(gl::ColorF *dst, const R32G32B32A32F *src);
      static void writeColor(R32G32B32A32F *dst, const gl::ColorF *src);
      static void average(R32G32B32A32F *dst, const R32G32B32A32F *src1, const R32G32B32A32F *src2);
  };
  
  struct R32F
  {
      float R;
  
      static void readColor(gl::ColorF *dst, const R32F *src);
      static void writeColor(R32F *dst, const gl::ColorF *src);
      static void average(R32F *dst, const R32F *src1, const R32F *src2);
  };
  
  struct A32F
  {
      float A;
  
      static void readColor(gl::ColorF *dst, const A32F *src);
      static void writeColor(A32F *dst, const gl::ColorF *src);
      static void average(A32F *dst, const A32F *src1, const A32F *src2);
  };
  
  struct L32F
  {
      float L;
  
      static void readColor(gl::ColorF *dst, const L32F *src);
      static void writeColor(L32F *dst, const gl::ColorF *src);
      static void average(L32F *dst, const L32F *src1, const L32F *src2);
  };
  
  struct L32A32F
  {
      float L;
      float A;
  
      static void readColor(gl::ColorF *dst, const L32A32F *src);
      static void writeColor(L32A32F *dst, const gl::ColorF *src);
      static void average(L32A32F *dst, const L32A32F *src1, const L32A32F *src2);
  };
  
  struct R32G32F
  {
      float R;
      float G;
  
      static void readColor(gl::ColorF *dst, const R32G32F *src);
      static void writeColor(R32G32F *dst, const gl::ColorF *src);
      static void average(R32G32F *dst, const R32G32F *src1, const R32G32F *src2);
  };
  
  struct R32G32B32F
  {
      float R;
      float G;
      float B;
  
      static void readColor(gl::ColorF *dst, const R32G32B32F *src);
      static void writeColor(R32G32B32F *dst, const gl::ColorF *src);
      static void average(R32G32B32F *dst, const R32G32B32F *src1, const R32G32B32F *src2);
  };
  
  struct R10G10B10A2
  {
      uint32_t R : 10;
      uint32_t G : 10;
      uint32_t B : 10;
      uint32_t A : 2;
  
      static void readColor(gl::ColorF *dst, const R10G10B10A2 *src);
      static void readColor(gl::ColorUI *dst, const R10G10B10A2 *src);
      static void writeColor(R10G10B10A2 *dst, const gl::ColorF *src);
      static void writeColor(R10G10B10A2 *dst, const gl::ColorUI *src);
      static void average(R10G10B10A2 *dst, const R10G10B10A2 *src1, const R10G10B10A2 *src2);
  };
  static_assert(sizeof(R10G10B10A2) == 4, "R10G10B10A2 struct not 32-bits.");
  
  struct R10G10B10A2S
  {
      int32_t R : 10;
      int32_t G : 10;
      int32_t B : 10;
      int32_t A : 2;
  
      static void readColor(gl::ColorF *dst, const R10G10B10A2S *src);
      static void readColor(gl::ColorI *dst, const R10G10B10A2S *src);
      static void writeColor(R10G10B10A2S *dst, const gl::ColorF *src);
      static void writeColor(R10G10B10A2S *dst, const gl::ColorI *src);
      static void average(R10G10B10A2S *dst, const R10G10B10A2S *src1, const R10G10B10A2S *src2);
  };
  static_assert(sizeof(R10G10B10A2S) == 4, "R10G10B10A2S struct not 32-bits.");
  
  struct R10G10B10X2
  {
      uint32_t R : 10;
      uint32_t G : 10;
      uint32_t B : 10;
  
      static void readColor(gl::ColorF *dst, const R10G10B10X2 *src);
      static void readColor(gl::ColorUI *dst, const R10G10B10X2 *src);
      static void writeColor(R10G10B10X2 *dst, const gl::ColorF *src);
      static void writeColor(R10G10B10X2 *dst, const gl::ColorUI *src);
      static void average(R10G10B10X2 *dst, const R10G10B10X2 *src1, const R10G10B10X2 *src2);
  };
  static_assert(sizeof(R10G10B10X2) == 4, "R10G10B10X2 struct not 32-bits.");
  
  struct B10G10R10A2
  {
      uint32_t B : 10;
      uint32_t G : 10;
      uint32_t R : 10;
      uint32_t A : 2;
  
      static void readColor(gl::ColorF *dst, const B10G10R10A2 *src);
      static void readColor(gl::ColorUI *dst, const B10G10R10A2 *src);
      static void writeColor(B10G10R10A2 *dst, const gl::ColorF *src);
      static void writeColor(B10G10R10A2 *dst, const gl::ColorUI *src);
      static void average(B10G10R10A2 *dst, const B10G10R10A2 *src1, const B10G10R10A2 *src2);
  };
  static_assert(sizeof(B10G10R10A2) == 4, "B10G10R10A2 struct not 32-bits.");
  
  struct R9G9B9E5
  {
      uint32_t R : 9;
      uint32_t G : 9;
      uint32_t B : 9;
      uint32_t E : 5;
  
      static void readColor(gl::ColorF *dst, const R9G9B9E5 *src);
      static void writeColor(R9G9B9E5 *dst, const gl::ColorF *src);
      static void average(R9G9B9E5 *dst, const R9G9B9E5 *src1, const R9G9B9E5 *src2);
  };
  static_assert(sizeof(R9G9B9E5) == 4, "R9G9B9E5 struct not 32-bits.");
  
  struct R11G11B10F
  {
      uint32_t R : 11;
      uint32_t G : 11;
      uint32_t B : 10;
  
      static void readColor(gl::ColorF *dst, const R11G11B10F *src);
      static void writeColor(R11G11B10F *dst, const gl::ColorF *src);
      static void average(R11G11B10F *dst, const R11G11B10F *src1, const R11G11B10F *src2);
  };
  static_assert(sizeof(R11G11B10F) == 4, "R11G11B10F struct not 32-bits.");
  
  struct D24S8
  {
      uint32_t S : 8;
      uint32_t D : 24;
  
      static void ReadDepthStencil(DepthStencil *dst, const D24S8 *src);
      static void WriteDepthStencil(D24S8 *dst, const DepthStencil *src);
  };
  
  struct S8
  {
      uint8_t S;
  
      static void ReadDepthStencil(DepthStencil *dst, const S8 *src);
      static void WriteDepthStencil(S8 *dst, const DepthStencil *src);
  };
  
  struct D16
  {
      uint16_t D;
  
      static void ReadDepthStencil(DepthStencil *dst, const D16 *src);
      static void WriteDepthStencil(D16 *dst, const DepthStencil *src);
  };
  
  struct D24X8
  {
      uint32_t D : 24;
      uint32_t X : 8;
  
      static void ReadDepthStencil(DepthStencil *dst, const D24X8 *src);
      static void WriteDepthStencil(D24X8 *dst, const DepthStencil *src);
  };
  
  struct D32F
  {
      float D;
  
      static void ReadDepthStencil(DepthStencil *dst, const D32F *src);
      static void WriteDepthStencil(D32F *dst, const DepthStencil *src);
  };
  
  struct D32
  {
      uint32_t D;
  
      static void ReadDepthStencil(DepthStencil *dst, const D32 *src);
      static void WriteDepthStencil(D32 *dst, const DepthStencil *src);
  };
  
  struct D32FS8X24
  {
      float D;
      uint32_t S;
  
      static void ReadDepthStencil(DepthStencil *dst, const D32FS8X24 *src);
      static void WriteDepthStencil(D32FS8X24 *dst, const DepthStencil *src);
  };
  }  // namespace angle
  
  #endif  // IMAGEUTIL_IMAGEFORMATS_H_