| // |
| // 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 "common/utilities.h" |
| #include "libANGLE/Constants.h" |
| #include "libANGLE/angletypes.h" |
| |
| #include <tuple> |
| |
| namespace gl |
| { |
| namespace |
| { |
| GLint TextureTargetToLayer(TextureTarget target) |
| { |
| switch (target) |
| { |
| case TextureTarget::CubeMapPositiveX: |
| return 0; |
| case TextureTarget::CubeMapNegativeX: |
| return 1; |
| case TextureTarget::CubeMapPositiveY: |
| return 2; |
| case TextureTarget::CubeMapNegativeY: |
| return 3; |
| case TextureTarget::CubeMapPositiveZ: |
| return 4; |
| case TextureTarget::CubeMapNegativeZ: |
| return 5; |
| case TextureTarget::External: |
| return ImageIndex::kEntireLevel; |
| case TextureTarget::Rectangle: |
| return ImageIndex::kEntireLevel; |
| case TextureTarget::_2D: |
| return ImageIndex::kEntireLevel; |
| case TextureTarget::_2DArray: |
| return ImageIndex::kEntireLevel; |
| case TextureTarget::_2DMultisample: |
| return ImageIndex::kEntireLevel; |
| case TextureTarget::_2DMultisampleArray: |
| return ImageIndex::kEntireLevel; |
| case TextureTarget::_3D: |
| return ImageIndex::kEntireLevel; |
| default: |
| UNREACHABLE(); |
| return 0; |
| } |
| } |
| |
| bool IsArrayTarget(TextureTarget target) |
| { |
| switch (target) |
| { |
| case TextureTarget::_2DArray: |
| case TextureTarget::_2DMultisampleArray: |
| return true; |
| default: |
| return false; |
| } |
| } |
| } // anonymous namespace |
| |
| TextureTarget TextureTypeToTarget(TextureType type, GLint layerIndex) |
| { |
| if (type == TextureType::CubeMap) |
| { |
| // As GL_TEXTURE_CUBE_MAP cannot be a texture target in texImage*D APIs, so we don't allow |
| // an entire cube map to have a texture target. |
| ASSERT(layerIndex != ImageIndex::kEntireLevel); |
| return CubeFaceIndexToTextureTarget(layerIndex); |
| } |
| else |
| { |
| return NonCubeTextureTypeToTarget(type); |
| } |
| } |
| |
| ImageIndex::ImageIndex() |
| : mType(TextureType::InvalidEnum), mLevelIndex(0), mLayerIndex(0), mLayerCount(kEntireLevel) |
| {} |
| |
| ImageIndex::ImageIndex(const ImageIndex &other) = default; |
| |
| ImageIndex &ImageIndex::operator=(const ImageIndex &other) = default; |
| |
| bool ImageIndex::hasLayer() const |
| { |
| return mLayerIndex != kEntireLevel; |
| } |
| |
| bool ImageIndex::isLayered() const |
| { |
| switch (mType) |
| { |
| case TextureType::_2DArray: |
| case TextureType::_2DMultisampleArray: |
| case TextureType::CubeMap: |
| case TextureType::_3D: |
| return mLayerIndex == kEntireLevel; |
| default: |
| return false; |
| } |
| } |
| |
| bool ImageIndex::has3DLayer() const |
| { |
| // It's quicker to check != CubeMap than calling usesTex3D, which checks multiple types. This |
| // ASSERT validates the check gives the same result. |
| ASSERT(!hasLayer() || ((mType != TextureType::CubeMap) == usesTex3D())); |
| return (hasLayer() && mType != TextureType::CubeMap); |
| } |
| |
| bool ImageIndex::usesTex3D() const |
| { |
| return mType == TextureType::_3D || mType == TextureType::_2DArray || |
| mType == TextureType::_2DMultisampleArray; |
| } |
| |
| TextureTarget ImageIndex::getTarget() const |
| { |
| return TextureTypeToTarget(mType, mLayerIndex); |
| } |
| |
| gl::TextureTarget ImageIndex::getTargetOrFirstCubeFace() const |
| { |
| if (isEntireLevelCubeMap()) |
| { |
| return gl::kCubeMapTextureTargetMin; |
| } |
| else |
| { |
| return getTarget(); |
| } |
| } |
| |
| GLint ImageIndex::cubeMapFaceIndex() const |
| { |
| ASSERT(mType == TextureType::CubeMap); |
| ASSERT(mLayerIndex == kEntireLevel || mLayerIndex < static_cast<GLint>(kCubeFaceCount)); |
| return mLayerIndex; |
| } |
| |
| bool ImageIndex::valid() const |
| { |
| return mType != TextureType::InvalidEnum; |
| } |
| |
| bool ImageIndex::isEntireLevelCubeMap() const |
| { |
| return mType == TextureType::CubeMap && mLayerIndex == ImageIndex::kEntireLevel; |
| } |
| |
| ImageIndex ImageIndex::Make2D(GLint levelIndex) |
| { |
| return ImageIndex(TextureType::_2D, levelIndex, kEntireLevel, 1); |
| } |
| |
| ImageIndex ImageIndex::MakeRectangle(GLint levelIndex) |
| { |
| return ImageIndex(TextureType::Rectangle, levelIndex, kEntireLevel, 1); |
| } |
| |
| ImageIndex ImageIndex::MakeCubeMapFace(TextureTarget target, GLint levelIndex) |
| { |
| ASSERT(IsCubeMapFaceTarget(target)); |
| return ImageIndex(TextureType::CubeMap, levelIndex, TextureTargetToLayer(target), 1); |
| } |
| |
| ImageIndex ImageIndex::Make2DArray(GLint levelIndex, GLint layerIndex) |
| { |
| return ImageIndex(TextureType::_2DArray, levelIndex, layerIndex, 1); |
| } |
| |
| ImageIndex ImageIndex::Make2DArrayRange(GLint levelIndex, GLint layerIndex, GLint numLayers) |
| { |
| return ImageIndex(TextureType::_2DArray, levelIndex, layerIndex, numLayers); |
| } |
| |
| ImageIndex ImageIndex::Make3D(GLint levelIndex, GLint layerIndex) |
| { |
| return ImageIndex(TextureType::_3D, levelIndex, layerIndex, 1); |
| } |
| |
| ImageIndex ImageIndex::MakeFromTarget(TextureTarget target, GLint levelIndex, GLint depth) |
| { |
| return ImageIndex(TextureTargetToType(target), levelIndex, TextureTargetToLayer(target), |
| IsArrayTarget(target) ? depth : 1); |
| } |
| |
| ImageIndex ImageIndex::MakeFromType(TextureType type, |
| GLint levelIndex, |
| GLint layerIndex, |
| GLint layerCount) |
| { |
| GLint overrideLayerCount = |
| (type == TextureType::CubeMap && layerIndex == kEntireLevel ? kCubeFaceCount : layerCount); |
| return ImageIndex(type, levelIndex, layerIndex, overrideLayerCount); |
| } |
| |
| ImageIndex ImageIndex::Make2DMultisample() |
| { |
| return ImageIndex(TextureType::_2DMultisample, 0, kEntireLevel, 1); |
| } |
| |
| ImageIndex ImageIndex::Make2DMultisampleArray(GLint layerIndex) |
| { |
| return ImageIndex(TextureType::_2DMultisampleArray, 0, layerIndex, 1); |
| } |
| |
| ImageIndex ImageIndex::Make2DMultisampleArrayRange(GLint layerIndex, GLint numLayers) |
| { |
| return ImageIndex(TextureType::_2DMultisampleArray, 0, layerIndex, numLayers); |
| } |
| |
| bool ImageIndex::operator<(const ImageIndex &b) const |
| { |
| return std::tie(mType, mLevelIndex, mLayerIndex, mLayerCount) < |
| std::tie(b.mType, b.mLevelIndex, b.mLayerIndex, b.mLayerCount); |
| } |
| |
| bool ImageIndex::operator==(const ImageIndex &b) const |
| { |
| return std::tie(mType, mLevelIndex, mLayerIndex, mLayerCount) == |
| std::tie(b.mType, b.mLevelIndex, b.mLayerIndex, b.mLayerCount); |
| } |
| |
| bool ImageIndex::operator!=(const ImageIndex &b) const |
| { |
| return !(*this == b); |
| } |
| |
| ImageIndex::ImageIndex(TextureType type, GLint levelIndex, GLint layerIndex, GLint layerCount) |
| : mType(type), mLevelIndex(levelIndex), mLayerIndex(layerIndex), mLayerCount(layerCount) |
| {} |
| |
| ImageIndexIterator ImageIndex::getLayerIterator(GLint layerCount) const |
| { |
| ASSERT(mType != TextureType::_2D && !hasLayer()); |
| return ImageIndexIterator::MakeGeneric(mType, mLevelIndex, mLevelIndex + 1, 0, layerCount); |
| } |
| |
| ImageIndexIterator::ImageIndexIterator(const ImageIndexIterator &other) = default; |
| |
| ImageIndexIterator ImageIndexIterator::Make2D(GLint minMip, GLint maxMip) |
| { |
| return ImageIndexIterator(TextureType::_2D, Range<GLint>(minMip, maxMip), |
| Range<GLint>(ImageIndex::kEntireLevel, ImageIndex::kEntireLevel), |
| nullptr); |
| } |
| |
| ImageIndexIterator ImageIndexIterator::MakeRectangle(GLint minMip, GLint maxMip) |
| { |
| return ImageIndexIterator(TextureType::Rectangle, Range<GLint>(minMip, maxMip), |
| Range<GLint>(ImageIndex::kEntireLevel, ImageIndex::kEntireLevel), |
| nullptr); |
| } |
| |
| ImageIndexIterator ImageIndexIterator::MakeCube(GLint minMip, GLint maxMip) |
| { |
| return ImageIndexIterator(TextureType::CubeMap, Range<GLint>(minMip, maxMip), |
| Range<GLint>(0, 6), nullptr); |
| } |
| |
| ImageIndexIterator ImageIndexIterator::Make3D(GLint minMip, |
| GLint maxMip, |
| GLint minLayer, |
| GLint maxLayer) |
| { |
| return ImageIndexIterator(TextureType::_3D, Range<GLint>(minMip, maxMip), |
| Range<GLint>(minLayer, maxLayer), nullptr); |
| } |
| |
| ImageIndexIterator ImageIndexIterator::Make2DArray(GLint minMip, |
| GLint maxMip, |
| const GLsizei *layerCounts) |
| { |
| return ImageIndexIterator(TextureType::_2DArray, Range<GLint>(minMip, maxMip), |
| Range<GLint>(0, IMPLEMENTATION_MAX_2D_ARRAY_TEXTURE_LAYERS), |
| layerCounts); |
| } |
| |
| ImageIndexIterator ImageIndexIterator::Make2DMultisample() |
| { |
| return ImageIndexIterator(TextureType::_2DMultisample, Range<GLint>(0, 1), |
| Range<GLint>(ImageIndex::kEntireLevel, ImageIndex::kEntireLevel), |
| nullptr); |
| } |
| |
| ImageIndexIterator ImageIndexIterator::Make2DMultisampleArray(const GLsizei *layerCounts) |
| { |
| return ImageIndexIterator(TextureType::_2DMultisampleArray, Range<GLint>(0, 1), |
| Range<GLint>(0, IMPLEMENTATION_MAX_2D_ARRAY_TEXTURE_LAYERS), |
| layerCounts); |
| } |
| |
| ImageIndexIterator ImageIndexIterator::MakeGeneric(TextureType type, |
| GLint minMip, |
| GLint maxMip, |
| GLint minLayer, |
| GLint maxLayer) |
| { |
| if (type == TextureType::CubeMap) |
| { |
| return MakeCube(minMip, maxMip); |
| } |
| |
| return ImageIndexIterator(type, Range<GLint>(minMip, maxMip), Range<GLint>(minLayer, maxLayer), |
| nullptr); |
| } |
| |
| ImageIndexIterator::ImageIndexIterator(TextureType type, |
| const Range<GLint> &mipRange, |
| const Range<GLint> &layerRange, |
| const GLsizei *layerCounts) |
| : mMipRange(mipRange), |
| mLayerRange(layerRange), |
| mLayerCounts(layerCounts), |
| mCurrentIndex(type, mipRange.low(), layerRange.low(), 1) |
| {} |
| |
| GLint ImageIndexIterator::maxLayer() const |
| { |
| if (mLayerCounts) |
| { |
| ASSERT(mCurrentIndex.hasLayer()); |
| return (mCurrentIndex.getLevelIndex() < mMipRange.high()) |
| ? mLayerCounts[mCurrentIndex.getLevelIndex()] |
| : 0; |
| } |
| return mLayerRange.high(); |
| } |
| |
| ImageIndex ImageIndexIterator::next() |
| { |
| ASSERT(hasNext()); |
| |
| // Make a copy of the current index to return |
| ImageIndex previousIndex = mCurrentIndex; |
| |
| // Iterate layers in the inner loop for now. We can add switchable |
| // layer or mip iteration if we need it. |
| |
| if (mCurrentIndex.hasLayer() && mCurrentIndex.getLayerIndex() < maxLayer() - 1) |
| { |
| mCurrentIndex.mLayerIndex++; |
| } |
| else if (mCurrentIndex.mLevelIndex < mMipRange.high() - 1) |
| { |
| mCurrentIndex.mLayerIndex = mLayerRange.low(); |
| mCurrentIndex.mLevelIndex++; |
| } |
| else |
| { |
| mCurrentIndex = ImageIndex(); |
| } |
| |
| return previousIndex; |
| } |
| |
| ImageIndex ImageIndexIterator::current() const |
| { |
| return mCurrentIndex; |
| } |
| |
| bool ImageIndexIterator::hasNext() const |
| { |
| return mCurrentIndex.valid(); |
| } |
| |
| } // namespace gl |
