kc3-lang/angle/src/libANGLE/ImageIndex.cpp

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• Hash : 95faa233
  Author :
  Date : 2016-06-07T14:01:53
  

  Do not apply UNPACK_SKIP_IMAGES for 2D textures on D3D
  
  Resubmitted with test skip added for Intel OpenGL.
  
  GLES 3.0.4 section 3.8.3:
  
  "For the purposes of decoding the texture image, TexImage2D is
  equivalent to calling TexImage3D with corresponding arguments and
  depth of 1, except that UNPACK_SKIP_IMAGES is ignored."
  
  An "applySkipImages" boolean parameter is added to the functions in
  the D3D backend that apply skip offset to the unpack pointer. In case
  2D texture data is uploaded, the parameter is set to false and
  UNPACK_SKIP_IMAGES is not applied.
  
  BUG=angleproject:1406
  TEST=angle_end2end_tests
  
  Change-Id: I5878439e3d38dbae89cc2452a056c2d6bbf9e0b3
  Reviewed-on: https://chromium-review.googlesource.com/351330
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
  

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• src/libANGLE/ImageIndex.cpp

• //
  // Copyright 2014 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.
  //
  
  // ImageIndex.cpp: Implementation for ImageIndex methods.
  
  #include "libANGLE/ImageIndex.h"
  #include "libANGLE/Constants.h"
  #include "common/utilities.h"
  
  namespace gl
  {
  
  ImageIndex::ImageIndex(const ImageIndex &other)
      : type(other.type),
        mipIndex(other.mipIndex),
        layerIndex(other.layerIndex)
  {}
  
  ImageIndex &ImageIndex::operator=(const ImageIndex &other)
  {
      type = other.type;
      mipIndex = other.mipIndex;
      layerIndex = other.layerIndex;
      return *this;
  }
  
  bool ImageIndex::is3D() const
  {
      return type == GL_TEXTURE_3D || type == GL_TEXTURE_2D_ARRAY;
  }
  
  ImageIndex ImageIndex::Make2D(GLint mipIndex)
  {
      return ImageIndex(GL_TEXTURE_2D, mipIndex, ENTIRE_LEVEL);
  }
  
  ImageIndex ImageIndex::MakeCube(GLenum target, GLint mipIndex)
  {
      ASSERT(gl::IsCubeMapTextureTarget(target));
      return ImageIndex(target, mipIndex,
                        static_cast<GLint>(CubeMapTextureTargetToLayerIndex(target)));
  }
  
  ImageIndex ImageIndex::Make2DArray(GLint mipIndex, GLint layerIndex)
  {
      return ImageIndex(GL_TEXTURE_2D_ARRAY, mipIndex, layerIndex);
  }
  
  ImageIndex ImageIndex::Make3D(GLint mipIndex, GLint layerIndex)
  {
      return ImageIndex(GL_TEXTURE_3D, mipIndex, layerIndex);
  }
  
  ImageIndex ImageIndex::MakeGeneric(GLenum target, GLint mipIndex)
  {
      GLint layerIndex = IsCubeMapTextureTarget(target)
                             ? static_cast<GLint>(CubeMapTextureTargetToLayerIndex(target))
                             : ENTIRE_LEVEL;
      return ImageIndex(target, mipIndex, layerIndex);
  }
  
  ImageIndex ImageIndex::MakeInvalid()
  {
      return ImageIndex(GL_NONE, -1, -1);
  }
  
  bool ImageIndex::operator<(const ImageIndex &other) const
  {
      if (type != other.type)
      {
          return type < other.type;
      }
      else if (mipIndex != other.mipIndex)
      {
          return mipIndex < other.mipIndex;
      }
      else
      {
          return layerIndex < other.layerIndex;
      }
  }
  
  bool ImageIndex::operator==(const ImageIndex &other) const
  {
      return (type == other.type) && (mipIndex == other.mipIndex) && (layerIndex == other.layerIndex);
  }
  
  bool ImageIndex::operator!=(const ImageIndex &other) const
  {
      return !(*this == other);
  }
  
  ImageIndex::ImageIndex(GLenum typeIn, GLint mipIndexIn, GLint layerIndexIn)
      : type(typeIn),
        mipIndex(mipIndexIn),
        layerIndex(layerIndexIn)
  {}
  
  ImageIndexIterator ImageIndexIterator::Make2D(GLint minMip, GLint maxMip)
  {
      return ImageIndexIterator(GL_TEXTURE_2D, Range<GLint>(minMip, maxMip),
                                Range<GLint>(ImageIndex::ENTIRE_LEVEL, ImageIndex::ENTIRE_LEVEL), NULL);
  }
  
  ImageIndexIterator ImageIndexIterator::MakeCube(GLint minMip, GLint maxMip)
  {
      return ImageIndexIterator(GL_TEXTURE_CUBE_MAP, Range<GLint>(minMip, maxMip), Range<GLint>(0, 6), NULL);
  }
  
  ImageIndexIterator ImageIndexIterator::Make3D(GLint minMip, GLint maxMip,
                                                GLint minLayer, GLint maxLayer)
  {
      return ImageIndexIterator(GL_TEXTURE_3D, Range<GLint>(minMip, maxMip), Range<GLint>(minLayer, maxLayer), NULL);
  }
  
  ImageIndexIterator ImageIndexIterator::Make2DArray(GLint minMip, GLint maxMip,
                                                     const GLsizei *layerCounts)
  {
      return ImageIndexIterator(GL_TEXTURE_2D_ARRAY, Range<GLint>(minMip, maxMip),
                                Range<GLint>(0, IMPLEMENTATION_MAX_2D_ARRAY_TEXTURE_LAYERS), layerCounts);
  }
  
  ImageIndexIterator::ImageIndexIterator(GLenum type, const Range<GLint> &mipRange,
                                         const Range<GLint> &layerRange, const GLsizei *layerCounts)
      : mType(type),
        mMipRange(mipRange),
        mLayerRange(layerRange),
        mLayerCounts(layerCounts),
        mCurrentMip(mipRange.start),
        mCurrentLayer(layerRange.start)
  {}
  
  GLint ImageIndexIterator::maxLayer() const
  {
      return (mLayerCounts ? static_cast<GLint>(mLayerCounts[mCurrentMip]) : mLayerRange.end);
  }
  
  ImageIndex ImageIndexIterator::next()
  {
      ASSERT(hasNext());
  
      ImageIndex value = current();
  
      // Iterate layers in the inner loop for now. We can add switchable
      // layer or mip iteration if we need it.
  
      if (mCurrentLayer != ImageIndex::ENTIRE_LEVEL)
      {
          if (mCurrentLayer < maxLayer()-1)
          {
              mCurrentLayer++;
          }
          else if (mCurrentMip < mMipRange.end-1)
          {
              mCurrentMip++;
              mCurrentLayer = mLayerRange.start;
          }
      }
      else if (mCurrentMip < mMipRange.end-1)
      {
          mCurrentMip++;
          mCurrentLayer = mLayerRange.start;
      }
  
      return value;
  }
  
  ImageIndex ImageIndexIterator::current() const
  {
      ImageIndex value(mType, mCurrentMip, mCurrentLayer);
  
      if (mType == GL_TEXTURE_CUBE_MAP)
      {
          value.type = LayerIndexToCubeMapTextureTarget(mCurrentLayer);
      }
  
      return value;
  }
  
  bool ImageIndexIterator::hasNext() const
  {
      return (mCurrentMip < mMipRange.end || mCurrentLayer < maxLayer());
  }
  
  }
  

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