kc3-lang/angle/src/libANGLE/formatutils.h

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• Hash : 11ffe1b8
  Author :
  Date : 2015-03-24T17:28:18
  

  Micro-optimize math in IndexDataManager
  
  Use bitwise operations instead of division, which is expensive on multiple CPU
  architectures.
  
  BUG=angleproject:956
  TEST=angle_end2end_tests
  
  Change-Id: I57ab540d447c03dae5a96bafb4975fc37e310261
  Reviewed-on: https://chromium-review.googlesource.com/262181
  Tested-by: Olli Etuaho <oetuaho@nvidia.com>
  Reviewed-by: Nicolas Capens <capn@chromium.org>
  Tested-by: Jamie Madill <jmadill@chromium.org>
  

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• src/libANGLE/formatutils.h

• //
  // Copyright (c) 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.
  //
  
  // formatutils.h: Queries for GL image formats.
  
  #ifndef LIBANGLE_FORMATUTILS_H_
  #define LIBANGLE_FORMATUTILS_H_
  
  #include "libANGLE/Caps.h"
  #include "libANGLE/angletypes.h"
  
  #include "angle_gl.h"
  
  #include <cstddef>
  #include <stdint.h>
  
  namespace gl
  {
  
  struct Type
  {
      Type();
  
      GLuint bytes;
      GLuint bytesShift; // Bit shift by this value to effectively divide/multiply by "bytes" in a more optimal way
      bool specialInterpretation;
  };
  const Type &GetTypeInfo(GLenum type);
  
  struct InternalFormat
  {
      InternalFormat();
  
      GLuint redBits;
      GLuint greenBits;
      GLuint blueBits;
  
      GLuint luminanceBits;
  
      GLuint alphaBits;
      GLuint sharedBits;
  
      GLuint depthBits;
      GLuint stencilBits;
  
      GLuint pixelBytes;
  
      GLuint componentCount;
  
      bool compressed;
      GLuint compressedBlockWidth;
      GLuint compressedBlockHeight;
  
      GLenum format;
      GLenum type;
  
      GLenum componentType;
      GLenum colorEncoding;
  
      typedef bool (*SupportCheckFunction)(GLuint, const Extensions &);
      SupportCheckFunction textureSupport;
      SupportCheckFunction renderSupport;
      SupportCheckFunction filterSupport;
  
      GLuint computeRowPitch(GLenum formatType, GLsizei width, GLint alignment, GLint rowLength) const;
      GLuint computeDepthPitch(GLenum formatType, GLsizei width, GLsizei height, GLint alignment, GLint rowLength) const;
      GLuint computeBlockSize(GLenum formatType, GLsizei width, GLsizei height) const;
  };
  const InternalFormat &GetInternalFormatInfo(GLenum internalFormat);
  
  GLenum GetSizedInternalFormat(GLenum internalFormat, GLenum type);
  
  typedef std::set<GLenum> FormatSet;
  const FormatSet &GetAllSizedInternalFormats();
  
  }
  
  #endif // LIBANGLE_FORMATUTILS_H_
  

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