kc3-lang/angle/src/libANGLE/renderer/copyvertex.h

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• Hash : f0b02054
  Author :
  Date : 2020-08-06T20:55:05
  

  Add a Vulkan feature to compress float32 vertex formats.
  
  Use the vertex conversion pipeline in VertexArrayVk to detect
  static vertex data and convert float32 vertices to float16. This
  feature is useful for determining if an allication is vertex
  bandwidth bound and seeing what gains could be had by using smaller
  attributes.
  
  This feature could be implemented in ANGLE's frontend but new
  infrastructure for converting and storing the converted attributes
  would need to be added to gl::VertexArray. Our backends already
  have the functionality needed to handle unsupported attribute formats
  and this can be repurposed for compressing vertex formats.
  
  Bug: b/167404532
  Bug: b/161716126
  Change-Id: I9a09656a72e8499faa4124adf876d7261c8341c9
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2342285
  Commit-Queue: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  

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• src/libANGLE/renderer/copyvertex.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.
  //
  
  // copyvertex.h: Defines vertex buffer copying and conversion functions
  
  #ifndef LIBANGLE_RENDERER_COPYVERTEX_H_
  #define LIBANGLE_RENDERER_COPYVERTEX_H_
  
  #include "common/mathutil.h"
  
  namespace rx
  {
  
  using VertexCopyFunction = void (*)(const uint8_t *input,
                                      size_t stride,
                                      size_t count,
                                      uint8_t *output);
  
  // 'alphaDefaultValueBits' gives the default value for the alpha channel (4th component)
  template <typename T,
            size_t inputComponentCount,
            size_t outputComponentCount,
            uint32_t alphaDefaultValueBits>
  void CopyNativeVertexData(const uint8_t *input, size_t stride, size_t count, uint8_t *output);
  
  template <size_t inputComponentCount, size_t outputComponentCount>
  void Copy8SintTo16SintVertexData(const uint8_t *input,
                                   size_t stride,
                                   size_t count,
                                   uint8_t *output);
  
  template <size_t componentCount>
  void Copy8SnormTo16SnormVertexData(const uint8_t *input,
                                     size_t stride,
                                     size_t count,
                                     uint8_t *output);
  
  template <size_t inputComponentCount, size_t outputComponentCount>
  void Copy32FixedTo32FVertexData(const uint8_t *input, size_t stride, size_t count, uint8_t *output);
  
  template <typename T, size_t inputComponentCount, size_t outputComponentCount, bool normalized>
  void CopyTo32FVertexData(const uint8_t *input, size_t stride, size_t count, uint8_t *output);
  
  template <size_t inputComponentCount, size_t outputComponentCount>
  void Copy32FTo16FVertexData(const uint8_t *input, size_t stride, size_t count, uint8_t *output);
  
  void CopyXYZ32FToXYZ9E5(const uint8_t *input, size_t stride, size_t count, uint8_t *output);
  
  void CopyXYZ32FToX11Y11B10F(const uint8_t *input, size_t stride, size_t count, uint8_t *output);
  
  template <bool isSigned, bool normalized, bool toFloat>
  void CopyXYZ10W2ToXYZW32FVertexData(const uint8_t *input,
                                      size_t stride,
                                      size_t count,
                                      uint8_t *output);
  
  template <bool isSigned, bool normalized>
  void CopyXYZ10ToXYZW32FVertexData(const uint8_t *input,
                                    size_t stride,
                                    size_t count,
                                    uint8_t *output);
  
  template <bool isSigned, bool normalized>
  void CopyW2XYZ10ToXYZW32FVertexData(const uint8_t *input,
                                      size_t stride,
                                      size_t count,
                                      uint8_t *output);
  
  }  // namespace rx
  
  #include "copyvertex.inc.h"
  
  #endif  // LIBANGLE_RENDERER_COPYVERTEX_H_
  

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