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kc3-lang/angle/src/libANGLE/formatutils.cpp
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Author :
Olli Etuaho
Date : 2015-03-24 17:28:18
Hash : 11ffe1b8
Message : 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>
- src/libANGLE/formatutils.cpp
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// // Copyright (c) 2013-2014 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. // // formatutils.cpp: Queries for GL image formats. #include "common/mathutil.h" #include "libANGLE/formatutils.h" #include "libANGLE/Context.h" #include "libANGLE/Framebuffer.h" #include "libANGLE/renderer/Renderer.h" namespace gl { // ES2 requires that format is equal to internal format at all glTex*Image2D entry points and the implementation // can decide the true, sized, internal format. The ES2FormatMap determines the internal format for all valid // format and type combinations. typedef std::pair<GLenum, GLenum> FormatTypePair; typedef std::pair<FormatTypePair, GLenum> FormatPair; typedef std::map<FormatTypePair, GLenum> FormatMap; // A helper function to insert data into the format map with fewer characters. static inline void InsertFormatMapping(FormatMap *map, GLenum format, GLenum type, GLenum internalFormat) { map->insert(FormatPair(FormatTypePair(format, type), internalFormat)); } FormatMap BuildFormatMap() { FormatMap map; // | Format | Type | Internal format | InsertFormatMapping(&map, GL_RGBA, GL_UNSIGNED_BYTE, GL_RGBA8); InsertFormatMapping(&map, GL_RGBA, GL_BYTE, GL_RGBA8_SNORM); InsertFormatMapping(&map, GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4, GL_RGBA4); InsertFormatMapping(&map, GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1, GL_RGB5_A1); InsertFormatMapping(&map, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, GL_RGB10_A2); InsertFormatMapping(&map, GL_RGBA, GL_FLOAT, GL_RGBA32F); InsertFormatMapping(&map, GL_RGBA, GL_HALF_FLOAT, GL_RGBA16F); InsertFormatMapping(&map, GL_RGBA, GL_HALF_FLOAT_OES, GL_RGBA16F); InsertFormatMapping(&map, GL_RGBA_INTEGER, GL_UNSIGNED_BYTE, GL_RGBA8UI); InsertFormatMapping(&map, GL_RGBA_INTEGER, GL_BYTE, GL_RGBA8I); InsertFormatMapping(&map, GL_RGBA_INTEGER, GL_UNSIGNED_SHORT, GL_RGBA16UI); InsertFormatMapping(&map, GL_RGBA_INTEGER, GL_SHORT, GL_RGBA16I); InsertFormatMapping(&map, GL_RGBA_INTEGER, GL_UNSIGNED_INT, GL_RGBA32UI); InsertFormatMapping(&map, GL_RGBA_INTEGER, GL_INT, GL_RGBA32I); InsertFormatMapping(&map, GL_RGBA_INTEGER, GL_UNSIGNED_INT_2_10_10_10_REV, GL_RGB10_A2UI); InsertFormatMapping(&map, GL_RGB, GL_UNSIGNED_BYTE, GL_RGB8); InsertFormatMapping(&map, GL_RGB, GL_BYTE, GL_RGB8_SNORM); InsertFormatMapping(&map, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, GL_RGB565); InsertFormatMapping(&map, GL_RGB, GL_UNSIGNED_INT_10F_11F_11F_REV, GL_R11F_G11F_B10F); InsertFormatMapping(&map, GL_RGB, GL_UNSIGNED_INT_5_9_9_9_REV, GL_RGB9_E5); InsertFormatMapping(&map, GL_RGB, GL_FLOAT, GL_RGB32F); InsertFormatMapping(&map, GL_RGB, GL_HALF_FLOAT, GL_RGB16F); InsertFormatMapping(&map, GL_RGB, GL_HALF_FLOAT_OES, GL_RGB16F); InsertFormatMapping(&map, GL_RGB_INTEGER, GL_UNSIGNED_BYTE, GL_RGB8UI); InsertFormatMapping(&map, GL_RGB_INTEGER, GL_BYTE, GL_RGB8I); InsertFormatMapping(&map, GL_RGB_INTEGER, GL_UNSIGNED_SHORT, GL_RGB16UI); InsertFormatMapping(&map, GL_RGB_INTEGER, GL_SHORT, GL_RGB16I); InsertFormatMapping(&map, GL_RGB_INTEGER, GL_UNSIGNED_INT, GL_RGB32UI); InsertFormatMapping(&map, GL_RGB_INTEGER, GL_INT, GL_RGB32I); InsertFormatMapping(&map, GL_RG, GL_UNSIGNED_BYTE, GL_RG8); InsertFormatMapping(&map, GL_RG, GL_BYTE, GL_RG8_SNORM); InsertFormatMapping(&map, GL_RG, GL_FLOAT, GL_RG32F); InsertFormatMapping(&map, GL_RG, GL_HALF_FLOAT, GL_RG16F); InsertFormatMapping(&map, GL_RG, GL_HALF_FLOAT_OES, GL_RG16F); InsertFormatMapping(&map, GL_RG_INTEGER, GL_UNSIGNED_BYTE, GL_RG8UI); InsertFormatMapping(&map, GL_RG_INTEGER, GL_BYTE, GL_RG8I); InsertFormatMapping(&map, GL_RG_INTEGER, GL_UNSIGNED_SHORT, GL_RG16UI); InsertFormatMapping(&map, GL_RG_INTEGER, GL_SHORT, GL_RG16I); InsertFormatMapping(&map, GL_RG_INTEGER, GL_UNSIGNED_INT, GL_RG32UI); InsertFormatMapping(&map, GL_RG_INTEGER, GL_INT, GL_RG32I); InsertFormatMapping(&map, GL_RED, GL_UNSIGNED_BYTE, GL_R8); InsertFormatMapping(&map, GL_RED, GL_BYTE, GL_R8_SNORM); InsertFormatMapping(&map, GL_RED, GL_FLOAT, GL_R32F); InsertFormatMapping(&map, GL_RED, GL_HALF_FLOAT, GL_R16F); InsertFormatMapping(&map, GL_RED, GL_HALF_FLOAT_OES, GL_R16F); InsertFormatMapping(&map, GL_RED_INTEGER, GL_UNSIGNED_BYTE, GL_R8UI); InsertFormatMapping(&map, GL_RED_INTEGER, GL_BYTE, GL_R8I); InsertFormatMapping(&map, GL_RED_INTEGER, GL_UNSIGNED_SHORT, GL_R16UI); InsertFormatMapping(&map, GL_RED_INTEGER, GL_SHORT, GL_R16I); InsertFormatMapping(&map, GL_RED_INTEGER, GL_UNSIGNED_INT, GL_R32UI); InsertFormatMapping(&map, GL_RED_INTEGER, GL_INT, GL_R32I); InsertFormatMapping(&map, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, GL_LUMINANCE8_ALPHA8_EXT); InsertFormatMapping(&map, GL_LUMINANCE, GL_UNSIGNED_BYTE, GL_LUMINANCE8_EXT); InsertFormatMapping(&map, GL_ALPHA, GL_UNSIGNED_BYTE, GL_ALPHA8_EXT); InsertFormatMapping(&map, GL_LUMINANCE_ALPHA, GL_FLOAT, GL_LUMINANCE_ALPHA32F_EXT); InsertFormatMapping(&map, GL_LUMINANCE, GL_FLOAT, GL_LUMINANCE32F_EXT); InsertFormatMapping(&map, GL_ALPHA, GL_FLOAT, GL_ALPHA32F_EXT); InsertFormatMapping(&map, GL_LUMINANCE_ALPHA, GL_HALF_FLOAT, GL_LUMINANCE_ALPHA16F_EXT); InsertFormatMapping(&map, GL_LUMINANCE_ALPHA, GL_HALF_FLOAT_OES, GL_LUMINANCE_ALPHA16F_EXT); InsertFormatMapping(&map, GL_LUMINANCE, GL_HALF_FLOAT, GL_LUMINANCE16F_EXT); InsertFormatMapping(&map, GL_LUMINANCE, GL_HALF_FLOAT_OES, GL_LUMINANCE16F_EXT); InsertFormatMapping(&map, GL_ALPHA, GL_HALF_FLOAT, GL_ALPHA16F_EXT); InsertFormatMapping(&map, GL_ALPHA, GL_HALF_FLOAT_OES, GL_ALPHA16F_EXT); InsertFormatMapping(&map, GL_BGRA_EXT, GL_UNSIGNED_BYTE, GL_BGRA8_EXT); InsertFormatMapping(&map, GL_BGRA_EXT, GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT, GL_BGRA4_ANGLEX); InsertFormatMapping(&map, GL_BGRA_EXT, GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT, GL_BGR5_A1_ANGLEX); InsertFormatMapping(&map, GL_SRGB_EXT, GL_UNSIGNED_BYTE, GL_SRGB8); InsertFormatMapping(&map, GL_SRGB_ALPHA_EXT, GL_UNSIGNED_BYTE, GL_SRGB8_ALPHA8); InsertFormatMapping(&map, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, GL_UNSIGNED_BYTE, GL_COMPRESSED_RGB_S3TC_DXT1_EXT); InsertFormatMapping(&map, GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, GL_UNSIGNED_BYTE, GL_COMPRESSED_RGBA_S3TC_DXT1_EXT); InsertFormatMapping(&map, GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE, GL_UNSIGNED_BYTE, GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE); InsertFormatMapping(&map, GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE, GL_UNSIGNED_BYTE, GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE); InsertFormatMapping(&map, GL_DEPTH_COMPONENT, GL_UNSIGNED_SHORT, GL_DEPTH_COMPONENT16); InsertFormatMapping(&map, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, GL_DEPTH_COMPONENT32_OES); InsertFormatMapping(&map, GL_DEPTH_COMPONENT, GL_FLOAT, GL_DEPTH_COMPONENT32F); InsertFormatMapping(&map, GL_STENCIL, GL_UNSIGNED_BYTE, GL_STENCIL_INDEX8); InsertFormatMapping(&map, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, GL_DEPTH24_STENCIL8); InsertFormatMapping(&map, GL_DEPTH_STENCIL, GL_FLOAT_32_UNSIGNED_INT_24_8_REV, GL_DEPTH32F_STENCIL8); return map; } Type::Type() : bytes(0), bytesShift(0), specialInterpretation(false) { } static Type GenTypeInfo(GLuint bytes, bool specialInterpretation) { Type info; info.bytes = bytes; GLuint i = 0; while ((1u << i) < bytes) { ++i; } info.bytesShift = i; ASSERT((1u << info.bytesShift) == bytes); info.specialInterpretation = specialInterpretation; return info; } bool operator<(const Type& a, const Type& b) { return memcmp(&a, &b, sizeof(Type)) < 0; } // Information about internal formats static bool AlwaysSupported(GLuint, const Extensions &) { return true; } static bool UnimplementedSupport(GLuint, const Extensions &) { return false; } static bool NeverSupported(GLuint, const Extensions &) { return false; } template <GLuint minCoreGLVersion> static bool RequireES(GLuint clientVersion, const Extensions &) { return clientVersion >= minCoreGLVersion; } // Pointer to a boolean memeber of the Extensions struct typedef bool(Extensions::*ExtensionBool); // Check support for a single extension template <ExtensionBool bool1> static bool RequireExt(GLuint, const Extensions & extensions) { return extensions.*bool1; } // Check for a minimum client version or a single extension template <GLuint minCoreGLVersion, ExtensionBool bool1> static bool RequireESOrExt(GLuint clientVersion, const Extensions &extensions) { return clientVersion >= minCoreGLVersion || extensions.*bool1; } // Check for a minimum client version or two extensions template <GLuint minCoreGLVersion, ExtensionBool bool1, ExtensionBool bool2> static bool RequireESOrExtAndExt(GLuint clientVersion, const Extensions &extensions) { return clientVersion >= minCoreGLVersion || (extensions.*bool1 && extensions.*bool2); } // Check for a minimum client version or at least one of two extensions template <GLuint minCoreGLVersion, ExtensionBool bool1, ExtensionBool bool2> static bool RequireESOrExtOrExt(GLuint clientVersion, const Extensions &extensions) { return clientVersion >= minCoreGLVersion || extensions.*bool1 || extensions.*bool2; } // Check support for two extensions template <ExtensionBool bool1, ExtensionBool bool2> static bool RequireExtAndExt(GLuint, const Extensions &extensions) { return extensions.*bool1 && extensions.*bool2; } InternalFormat::InternalFormat() : redBits(0), greenBits(0), blueBits(0), luminanceBits(0), alphaBits(0), sharedBits(0), depthBits(0), stencilBits(0), pixelBytes(0), componentCount(0), compressedBlockWidth(0), compressedBlockHeight(0), format(GL_NONE), type(GL_NONE), componentType(GL_NONE), colorEncoding(GL_NONE), compressed(false), textureSupport(NeverSupported), renderSupport(NeverSupported), filterSupport(NeverSupported) { } static InternalFormat UnsizedFormat(GLenum format, InternalFormat::SupportCheckFunction textureSupport, InternalFormat::SupportCheckFunction renderSupport, InternalFormat::SupportCheckFunction filterSupport) { InternalFormat formatInfo; formatInfo.format = format; formatInfo.textureSupport = textureSupport; formatInfo.renderSupport = renderSupport; formatInfo.filterSupport = filterSupport; return formatInfo; } static InternalFormat RGBAFormat(GLuint red, GLuint green, GLuint blue, GLuint alpha, GLuint shared, GLenum format, GLenum type, GLenum componentType, bool srgb, InternalFormat::SupportCheckFunction textureSupport, InternalFormat::SupportCheckFunction renderSupport, InternalFormat::SupportCheckFunction filterSupport) { InternalFormat formatInfo; formatInfo.redBits = red; formatInfo.greenBits = green; formatInfo.blueBits = blue; formatInfo.alphaBits = alpha; formatInfo.sharedBits = shared; formatInfo.pixelBytes = (red + green + blue + alpha + shared) / 8; formatInfo.componentCount = ((red > 0) ? 1 : 0) + ((green > 0) ? 1 : 0) + ((blue > 0) ? 1 : 0) + ((alpha > 0) ? 1 : 0); formatInfo.format = format; formatInfo.type = type; formatInfo.componentType = componentType; formatInfo.colorEncoding = (srgb ? GL_SRGB : GL_LINEAR); formatInfo.textureSupport = textureSupport; formatInfo.renderSupport = renderSupport; formatInfo.filterSupport = filterSupport; return formatInfo; } static InternalFormat LUMAFormat(GLuint luminance, GLuint alpha, GLenum format, GLenum type, GLenum componentType, InternalFormat::SupportCheckFunction textureSupport, InternalFormat::SupportCheckFunction renderSupport, InternalFormat::SupportCheckFunction filterSupport) { InternalFormat formatInfo; formatInfo.luminanceBits = luminance; formatInfo.alphaBits = alpha; formatInfo.pixelBytes = (luminance + alpha) / 8; formatInfo.componentCount = ((luminance > 0) ? 1 : 0) + ((alpha > 0) ? 1 : 0); formatInfo.format = format; formatInfo.type = type; formatInfo.componentType = componentType; formatInfo.colorEncoding = GL_LINEAR; formatInfo.textureSupport = textureSupport; formatInfo.renderSupport = renderSupport; formatInfo.filterSupport = filterSupport; return formatInfo; } static InternalFormat DepthStencilFormat(GLuint depthBits, GLuint stencilBits, GLuint unusedBits, GLenum format, GLenum type, GLenum componentType, InternalFormat::SupportCheckFunction textureSupport, InternalFormat::SupportCheckFunction renderSupport, InternalFormat::SupportCheckFunction filterSupport) { InternalFormat formatInfo; formatInfo.depthBits = depthBits; formatInfo.stencilBits = stencilBits; formatInfo.pixelBytes = (depthBits + stencilBits + unusedBits) / 8; formatInfo.componentCount = ((depthBits > 0) ? 1 : 0) + ((stencilBits > 0) ? 1 : 0); formatInfo.format = format; formatInfo.type = type; formatInfo.componentType = componentType; formatInfo.colorEncoding = GL_LINEAR; formatInfo.textureSupport = textureSupport; formatInfo.renderSupport = renderSupport; formatInfo.filterSupport = filterSupport; return formatInfo; } static InternalFormat CompressedFormat(GLuint compressedBlockWidth, GLuint compressedBlockHeight, GLuint compressedBlockSize, GLuint componentCount, GLenum format, GLenum type, bool srgb, InternalFormat::SupportCheckFunction textureSupport, InternalFormat::SupportCheckFunction renderSupport, InternalFormat::SupportCheckFunction filterSupport) { InternalFormat formatInfo; formatInfo.compressedBlockWidth = compressedBlockWidth; formatInfo.compressedBlockHeight = compressedBlockHeight; formatInfo.pixelBytes = compressedBlockSize / 8; formatInfo.componentCount = componentCount; formatInfo.format = format; formatInfo.type = type; formatInfo.componentType = GL_UNSIGNED_NORMALIZED; formatInfo.colorEncoding = (srgb ? GL_SRGB : GL_LINEAR); formatInfo.compressed = true; formatInfo.textureSupport = textureSupport; formatInfo.renderSupport = renderSupport; formatInfo.filterSupport = filterSupport; return formatInfo; } typedef std::pair<GLenum, InternalFormat> InternalFormatInfoPair; typedef std::map<GLenum, InternalFormat> InternalFormatInfoMap; static InternalFormatInfoMap BuildInternalFormatInfoMap() { InternalFormatInfoMap map; // From ES 3.0.1 spec, table 3.12 map.insert(InternalFormatInfoPair(GL_NONE, InternalFormat())); // | Internal format | | R | G | B | A |S | Format | Type | Component type | SRGB | Texture supported | Renderable | Filterable | map.insert(InternalFormatInfoPair(GL_R8, RGBAFormat( 8, 0, 0, 0, 0, GL_RED, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, false, RequireESOrExt<3, &Extensions::textureRG>, RequireESOrExt<3, &Extensions::textureRG>, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_R8_SNORM, RGBAFormat( 8, 0, 0, 0, 0, GL_RED, GL_BYTE, GL_SIGNED_NORMALIZED, false, RequireES<3>, NeverSupported, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_RG8, RGBAFormat( 8, 8, 0, 0, 0, GL_RG, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, false, RequireESOrExt<3, &Extensions::textureRG>, RequireESOrExt<3, &Extensions::textureRG>, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_RG8_SNORM, RGBAFormat( 8, 8, 0, 0, 0, GL_RG, GL_BYTE, GL_SIGNED_NORMALIZED, false, RequireES<3>, NeverSupported, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_RGB8, RGBAFormat( 8, 8, 8, 0, 0, GL_RGB, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, false, RequireESOrExt<3, &Extensions::rgb8rgba8>, RequireESOrExt<3, &Extensions::rgb8rgba8>, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_RGB8_SNORM, RGBAFormat( 8, 8, 8, 0, 0, GL_RGB, GL_BYTE, GL_SIGNED_NORMALIZED, false, RequireES<3>, NeverSupported, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_RGB565, RGBAFormat( 5, 6, 5, 0, 0, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, GL_UNSIGNED_NORMALIZED, false, RequireES<2>, RequireES<2>, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_RGBA4, RGBAFormat( 4, 4, 4, 4, 0, GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4, GL_UNSIGNED_NORMALIZED, false, RequireES<2>, RequireES<2>, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_RGB5_A1, RGBAFormat( 5, 5, 5, 1, 0, GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1, GL_UNSIGNED_NORMALIZED, false, RequireES<2>, RequireES<2>, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_RGBA8, RGBAFormat( 8, 8, 8, 8, 0, GL_RGBA, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, false, RequireESOrExt<3, &Extensions::rgb8rgba8>, RequireESOrExt<3, &Extensions::rgb8rgba8>, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_RGBA8_SNORM, RGBAFormat( 8, 8, 8, 8, 0, GL_RGBA, GL_BYTE, GL_SIGNED_NORMALIZED, false, RequireES<3>, NeverSupported, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_RGB10_A2, RGBAFormat(10, 10, 10, 2, 0, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, GL_UNSIGNED_NORMALIZED, false, RequireES<3>, RequireES<3>, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_RGB10_A2UI, RGBAFormat(10, 10, 10, 2, 0, GL_RGBA_INTEGER, GL_UNSIGNED_INT_2_10_10_10_REV, GL_UNSIGNED_INT, false, RequireES<3>, NeverSupported, NeverSupported))); map.insert(InternalFormatInfoPair(GL_SRGB8, RGBAFormat( 8, 8, 8, 0, 0, GL_RGB, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, true, RequireESOrExt<3, &Extensions::sRGB>, NeverSupported, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_SRGB8_ALPHA8, RGBAFormat( 8, 8, 8, 8, 0, GL_RGBA, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, true, RequireESOrExt<3, &Extensions::sRGB>, RequireESOrExt<3, &Extensions::sRGB>, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_R11F_G11F_B10F, RGBAFormat(11, 11, 10, 0, 0, GL_RGB, GL_UNSIGNED_INT_10F_11F_11F_REV, GL_FLOAT, false, RequireES<3>, RequireExt<&Extensions::colorBufferFloat>, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_RGB9_E5, RGBAFormat( 9, 9, 9, 0, 5, GL_RGB, GL_UNSIGNED_INT_5_9_9_9_REV, GL_FLOAT, false, RequireES<3>, NeverSupported, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_R8I, RGBAFormat( 8, 0, 0, 0, 0, GL_RED_INTEGER, GL_BYTE, GL_INT, false, RequireES<3>, RequireES<3>, NeverSupported))); map.insert(InternalFormatInfoPair(GL_R8UI, RGBAFormat( 8, 0, 0, 0, 0, GL_RED_INTEGER, GL_UNSIGNED_BYTE, GL_UNSIGNED_INT, false, RequireES<3>, RequireES<3>, NeverSupported))); map.insert(InternalFormatInfoPair(GL_R16I, RGBAFormat(16, 0, 0, 0, 0, GL_RED_INTEGER, GL_SHORT, GL_INT, false, RequireES<3>, RequireES<3>, NeverSupported))); map.insert(InternalFormatInfoPair(GL_R16UI, RGBAFormat(16, 0, 0, 0, 0, GL_RED_INTEGER, GL_UNSIGNED_SHORT, GL_UNSIGNED_INT, false, RequireES<3>, RequireES<3>, NeverSupported))); map.insert(InternalFormatInfoPair(GL_R32I, RGBAFormat(32, 0, 0, 0, 0, GL_RED_INTEGER, GL_INT, GL_INT, false, RequireES<3>, RequireES<3>, NeverSupported))); map.insert(InternalFormatInfoPair(GL_R32UI, RGBAFormat(32, 0, 0, 0, 0, GL_RED_INTEGER, GL_UNSIGNED_INT, GL_UNSIGNED_INT, false, RequireES<3>, RequireES<3>, NeverSupported))); map.insert(InternalFormatInfoPair(GL_RG8I, RGBAFormat( 8, 8, 0, 0, 0, GL_RG_INTEGER, GL_BYTE, GL_INT, false, RequireES<3>, RequireES<3>, NeverSupported))); map.insert(InternalFormatInfoPair(GL_RG8UI, RGBAFormat( 8, 8, 0, 0, 0, GL_RG_INTEGER, GL_UNSIGNED_BYTE, GL_UNSIGNED_INT, false, RequireES<3>, RequireES<3>, NeverSupported))); map.insert(InternalFormatInfoPair(GL_RG16I, RGBAFormat(16, 16, 0, 0, 0, GL_RG_INTEGER, GL_SHORT, GL_INT, false, RequireES<3>, RequireES<3>, NeverSupported))); map.insert(InternalFormatInfoPair(GL_RG16UI, RGBAFormat(16, 16, 0, 0, 0, GL_RG_INTEGER, GL_UNSIGNED_SHORT, GL_UNSIGNED_INT, false, RequireES<3>, RequireES<3>, NeverSupported))); map.insert(InternalFormatInfoPair(GL_RG32I, RGBAFormat(32, 32, 0, 0, 0, GL_RG_INTEGER, GL_INT, GL_INT, false, RequireES<3>, RequireES<3>, NeverSupported))); map.insert(InternalFormatInfoPair(GL_RG32UI, RGBAFormat(32, 32, 0, 0, 0, GL_RG_INTEGER, GL_UNSIGNED_INT, GL_UNSIGNED_INT, false, RequireES<3>, RequireES<3>, NeverSupported))); map.insert(InternalFormatInfoPair(GL_RGB8I, RGBAFormat( 8, 8, 8, 0, 0, GL_RGB_INTEGER, GL_BYTE, GL_INT, false, RequireES<3>, NeverSupported, NeverSupported))); map.insert(InternalFormatInfoPair(GL_RGB8UI, RGBAFormat( 8, 8, 8, 0, 0, GL_RGB_INTEGER, GL_UNSIGNED_BYTE, GL_UNSIGNED_INT, false, RequireES<3>, NeverSupported, NeverSupported))); map.insert(InternalFormatInfoPair(GL_RGB16I, RGBAFormat(16, 16, 16, 0, 0, GL_RGB_INTEGER, GL_SHORT, GL_INT, false, RequireES<3>, NeverSupported, NeverSupported))); map.insert(InternalFormatInfoPair(GL_RGB16UI, RGBAFormat(16, 16, 16, 0, 0, GL_RGB_INTEGER, GL_UNSIGNED_SHORT, GL_UNSIGNED_INT, false, RequireES<3>, NeverSupported, NeverSupported))); map.insert(InternalFormatInfoPair(GL_RGB32I, RGBAFormat(32, 32, 32, 0, 0, GL_RGB_INTEGER, GL_INT, GL_INT, false, RequireES<3>, NeverSupported, NeverSupported))); map.insert(InternalFormatInfoPair(GL_RGB32UI, RGBAFormat(32, 32, 32, 0, 0, GL_RGB_INTEGER, GL_UNSIGNED_INT, GL_UNSIGNED_INT, false, RequireES<3>, NeverSupported, NeverSupported))); map.insert(InternalFormatInfoPair(GL_RGBA8I, RGBAFormat( 8, 8, 8, 8, 0, GL_RGBA_INTEGER, GL_BYTE, GL_INT, false, RequireES<3>, RequireES<3>, NeverSupported))); map.insert(InternalFormatInfoPair(GL_RGBA8UI, RGBAFormat( 8, 8, 8, 8, 0, GL_RGBA_INTEGER, GL_UNSIGNED_BYTE, GL_UNSIGNED_INT, false, RequireES<3>, RequireES<3>, NeverSupported))); map.insert(InternalFormatInfoPair(GL_RGBA16I, RGBAFormat(16, 16, 16, 16, 0, GL_RGBA_INTEGER, GL_SHORT, GL_INT, false, RequireES<3>, RequireES<3>, NeverSupported))); map.insert(InternalFormatInfoPair(GL_RGBA16UI, RGBAFormat(16, 16, 16, 16, 0, GL_RGBA_INTEGER, GL_UNSIGNED_SHORT, GL_UNSIGNED_INT, false, RequireES<3>, RequireES<3>, NeverSupported))); map.insert(InternalFormatInfoPair(GL_RGBA32I, RGBAFormat(32, 32, 32, 32, 0, GL_RGBA_INTEGER, GL_INT, GL_INT, false, RequireES<3>, RequireES<3>, NeverSupported))); map.insert(InternalFormatInfoPair(GL_RGBA32UI, RGBAFormat(32, 32, 32, 32, 0, GL_RGBA_INTEGER, GL_UNSIGNED_INT, GL_UNSIGNED_INT, false, RequireES<3>, RequireES<3>, NeverSupported))); map.insert(InternalFormatInfoPair(GL_BGRA8_EXT, RGBAFormat( 8, 8, 8, 8, 0, GL_BGRA_EXT, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureFormatBGRA8888>, RequireExt<&Extensions::textureFormatBGRA8888>, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_BGRA4_ANGLEX, RGBAFormat( 4, 4, 4, 4, 0, GL_BGRA_EXT, GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT, GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureFormatBGRA8888>, RequireExt<&Extensions::textureFormatBGRA8888>, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_BGR5_A1_ANGLEX, RGBAFormat( 5, 5, 5, 1, 0, GL_BGRA_EXT, GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT, GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureFormatBGRA8888>, RequireExt<&Extensions::textureFormatBGRA8888>, AlwaysSupported))); // Floating point renderability and filtering is provided by OES_texture_float and OES_texture_half_float // | Internal format | | D |S | Format | Type | Comp | SRGB | Texture supported | Renderable | Filterable | // | | | | | | | type | | | | | map.insert(InternalFormatInfoPair(GL_R16F, RGBAFormat(16, 0, 0, 0, 0, GL_RED, GL_HALF_FLOAT, GL_FLOAT, false, RequireESOrExtAndExt<3, &Extensions::textureHalfFloat, &Extensions::textureRG>, RequireESOrExtAndExt<3, &Extensions::textureHalfFloat, &Extensions::textureRG>, RequireExt<&Extensions::textureHalfFloatLinear>))); map.insert(InternalFormatInfoPair(GL_RG16F, RGBAFormat(16, 16, 0, 0, 0, GL_RG, GL_HALF_FLOAT, GL_FLOAT, false, RequireESOrExtAndExt<3, &Extensions::textureHalfFloat, &Extensions::textureRG>, RequireESOrExtAndExt<3, &Extensions::textureHalfFloat, &Extensions::textureRG>, RequireExt<&Extensions::textureHalfFloatLinear>))); map.insert(InternalFormatInfoPair(GL_RGB16F, RGBAFormat(16, 16, 16, 0, 0, GL_RGB, GL_HALF_FLOAT, GL_FLOAT, false, RequireESOrExt<3, &Extensions::textureHalfFloat>, RequireESOrExt<3, &Extensions::textureHalfFloat>, RequireExt<&Extensions::textureHalfFloatLinear>))); map.insert(InternalFormatInfoPair(GL_RGBA16F, RGBAFormat(16, 16, 16, 16, 0, GL_RGBA, GL_HALF_FLOAT, GL_FLOAT, false, RequireESOrExt<3, &Extensions::textureHalfFloat>, RequireESOrExt<3, &Extensions::textureHalfFloat>, RequireExt<&Extensions::textureHalfFloatLinear>))); map.insert(InternalFormatInfoPair(GL_R32F, RGBAFormat(32, 0, 0, 0, 0, GL_RED, GL_FLOAT, GL_FLOAT, false, RequireESOrExtAndExt<3, &Extensions::textureFloat, &Extensions::textureRG>, RequireESOrExtAndExt<3, &Extensions::textureFloat, &Extensions::textureRG>, RequireExt<&Extensions::textureFloatLinear> ))); map.insert(InternalFormatInfoPair(GL_RG32F, RGBAFormat(32, 32, 0, 0, 0, GL_RG, GL_FLOAT, GL_FLOAT, false, RequireESOrExtAndExt<3, &Extensions::textureFloat, &Extensions::textureRG>, RequireESOrExtAndExt<3, &Extensions::textureFloat, &Extensions::textureRG>, RequireExt<&Extensions::textureFloatLinear> ))); map.insert(InternalFormatInfoPair(GL_RGB32F, RGBAFormat(32, 32, 32, 0, 0, GL_RGB, GL_FLOAT, GL_FLOAT, false, RequireESOrExt<3, &Extensions::textureFloat>, RequireESOrExt<3, &Extensions::textureFloat>, RequireExt<&Extensions::textureFloatLinear> ))); map.insert(InternalFormatInfoPair(GL_RGBA32F, RGBAFormat(32, 32, 32, 32, 0, GL_RGBA, GL_FLOAT, GL_FLOAT, false, RequireESOrExt<3, &Extensions::textureFloat>, RequireESOrExt<3, &Extensions::textureFloat>, RequireExt<&Extensions::textureFloatLinear> ))); // Depth stencil formats // | Internal format | | D |S | X | Format | Type | Component type | Supported | Renderable | Filterable | map.insert(InternalFormatInfoPair(GL_DEPTH_COMPONENT16, DepthStencilFormat(16, 0, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_SHORT, GL_UNSIGNED_NORMALIZED, RequireES<2>, RequireES<2>, RequireESOrExt<3, &Extensions::depthTextures>))); map.insert(InternalFormatInfoPair(GL_DEPTH_COMPONENT24, DepthStencilFormat(24, 0, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, GL_UNSIGNED_NORMALIZED, RequireES<3>, RequireES<3>, RequireESOrExt<3, &Extensions::depthTextures>))); map.insert(InternalFormatInfoPair(GL_DEPTH_COMPONENT32F, DepthStencilFormat(32, 0, 0, GL_DEPTH_COMPONENT, GL_FLOAT, GL_FLOAT, RequireES<3>, RequireES<3>, RequireESOrExt<3, &Extensions::depthTextures>))); map.insert(InternalFormatInfoPair(GL_DEPTH_COMPONENT32_OES, DepthStencilFormat(32, 0, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, GL_UNSIGNED_NORMALIZED, RequireExt<&Extensions::depthTextures>, RequireExt<&Extensions::depthTextures>, AlwaysSupported ))); map.insert(InternalFormatInfoPair(GL_DEPTH24_STENCIL8, DepthStencilFormat(24, 8, 0, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, GL_UNSIGNED_NORMALIZED, RequireESOrExt<3, &Extensions::depthTextures>, RequireESOrExtOrExt<3, &Extensions::depthTextures, &Extensions::packedDepthStencil>, AlwaysSupported ))); map.insert(InternalFormatInfoPair(GL_DEPTH32F_STENCIL8, DepthStencilFormat(32, 8, 24, GL_DEPTH_STENCIL, GL_FLOAT_32_UNSIGNED_INT_24_8_REV, GL_FLOAT, RequireES<3>, RequireES<3>, AlwaysSupported ))); // STENCIL_INDEX8 is special-cased, see around the bottom of the list. // Luminance alpha formats // | Internal format | | L | A | Format | Type | Component type | Supported | Renderable | Filterable | map.insert(InternalFormatInfoPair(GL_ALPHA8_EXT, LUMAFormat( 0, 8, GL_ALPHA, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, RequireExt<&Extensions::textureStorage>, NeverSupported, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_LUMINANCE8_EXT, LUMAFormat( 8, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, RequireExt<&Extensions::textureStorage>, NeverSupported, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_ALPHA32F_EXT, LUMAFormat( 0, 32, GL_ALPHA, GL_FLOAT, GL_FLOAT, RequireExtAndExt<&Extensions::textureStorage, &Extensions::textureFloat>, NeverSupported, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_LUMINANCE32F_EXT, LUMAFormat(32, 0, GL_LUMINANCE, GL_FLOAT, GL_FLOAT, RequireExtAndExt<&Extensions::textureStorage, &Extensions::textureFloat>, NeverSupported, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_ALPHA16F_EXT, LUMAFormat( 0, 16, GL_ALPHA, GL_HALF_FLOAT, GL_FLOAT, RequireExtAndExt<&Extensions::textureStorage, &Extensions::textureHalfFloat>, NeverSupported, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_LUMINANCE16F_EXT, LUMAFormat(16, 0, GL_LUMINANCE, GL_HALF_FLOAT, GL_FLOAT, RequireExtAndExt<&Extensions::textureStorage, &Extensions::textureHalfFloat>, NeverSupported, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_LUMINANCE8_ALPHA8_EXT, LUMAFormat( 8, 8, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, RequireExt<&Extensions::textureStorage>, NeverSupported, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_LUMINANCE_ALPHA32F_EXT, LUMAFormat(32, 32, GL_LUMINANCE_ALPHA, GL_FLOAT, GL_FLOAT, RequireExtAndExt<&Extensions::textureStorage, &Extensions::textureFloat>, NeverSupported, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_LUMINANCE_ALPHA16F_EXT, LUMAFormat(16, 16, GL_LUMINANCE_ALPHA, GL_HALF_FLOAT, GL_FLOAT, RequireExtAndExt<&Extensions::textureStorage, &Extensions::textureHalfFloat>, NeverSupported, AlwaysSupported))); // Unsized formats // | Internal format | | Format | Supported | Renderable | Filterable | map.insert(InternalFormatInfoPair(GL_ALPHA, UnsizedFormat(GL_ALPHA, RequireES<2>, NeverSupported, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_LUMINANCE, UnsizedFormat(GL_LUMINANCE, RequireES<2>, NeverSupported, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_LUMINANCE_ALPHA, UnsizedFormat(GL_LUMINANCE_ALPHA, RequireES<2>, NeverSupported, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_RED, UnsizedFormat(GL_RED, RequireESOrExt<3, &Extensions::textureRG>, NeverSupported, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_RG, UnsizedFormat(GL_RG, RequireESOrExt<3, &Extensions::textureRG>, NeverSupported, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_RGB, UnsizedFormat(GL_RGB, RequireES<2>, RequireES<2>, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_RGBA, UnsizedFormat(GL_RGBA, RequireES<2>, RequireES<2>, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_RED_INTEGER, UnsizedFormat(GL_RED_INTEGER, RequireES<3>, NeverSupported, NeverSupported ))); map.insert(InternalFormatInfoPair(GL_RG_INTEGER, UnsizedFormat(GL_RG_INTEGER, RequireES<3>, NeverSupported, NeverSupported ))); map.insert(InternalFormatInfoPair(GL_RGB_INTEGER, UnsizedFormat(GL_RGB_INTEGER, RequireES<3>, NeverSupported, NeverSupported ))); map.insert(InternalFormatInfoPair(GL_RGBA_INTEGER, UnsizedFormat(GL_RGBA_INTEGER, RequireES<3>, NeverSupported, NeverSupported ))); map.insert(InternalFormatInfoPair(GL_BGRA_EXT, UnsizedFormat(GL_BGRA_EXT, RequireExt<&Extensions::textureFormatBGRA8888>, RequireExt<&Extensions::textureFormatBGRA8888>, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_DEPTH_COMPONENT, UnsizedFormat(GL_DEPTH_COMPONENT, RequireES<2>, RequireES<2>, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_DEPTH_STENCIL, UnsizedFormat(GL_DEPTH_STENCIL, RequireESOrExt<3, &Extensions::packedDepthStencil>, RequireESOrExt<3, &Extensions::packedDepthStencil>, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_SRGB_EXT, UnsizedFormat(GL_RGB, RequireESOrExt<3, &Extensions::sRGB>, NeverSupported, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_SRGB_ALPHA_EXT, UnsizedFormat(GL_RGBA, RequireESOrExt<3, &Extensions::sRGB>, RequireESOrExt<3, &Extensions::sRGB>, AlwaysSupported))); // Compressed formats, From ES 3.0.1 spec, table 3.16 // | Internal format | |W |H | BS |CC| Format | Type | SRGB | Supported | Renderable | Filterable | map.insert(InternalFormatInfoPair(GL_COMPRESSED_R11_EAC, CompressedFormat(4, 4, 64, 1, GL_COMPRESSED_R11_EAC, GL_UNSIGNED_BYTE, false, UnimplementedSupport, UnimplementedSupport, UnimplementedSupport))); map.insert(InternalFormatInfoPair(GL_COMPRESSED_SIGNED_R11_EAC, CompressedFormat(4, 4, 64, 1, GL_COMPRESSED_SIGNED_R11_EAC, GL_UNSIGNED_BYTE, false, UnimplementedSupport, UnimplementedSupport, UnimplementedSupport))); map.insert(InternalFormatInfoPair(GL_COMPRESSED_RG11_EAC, CompressedFormat(4, 4, 128, 2, GL_COMPRESSED_RG11_EAC, GL_UNSIGNED_BYTE, false, UnimplementedSupport, UnimplementedSupport, UnimplementedSupport))); map.insert(InternalFormatInfoPair(GL_COMPRESSED_SIGNED_RG11_EAC, CompressedFormat(4, 4, 128, 2, GL_COMPRESSED_SIGNED_RG11_EAC, GL_UNSIGNED_BYTE, false, UnimplementedSupport, UnimplementedSupport, UnimplementedSupport))); map.insert(InternalFormatInfoPair(GL_COMPRESSED_RGB8_ETC2, CompressedFormat(4, 4, 64, 3, GL_COMPRESSED_RGB8_ETC2, GL_UNSIGNED_BYTE, false, UnimplementedSupport, UnimplementedSupport, UnimplementedSupport))); map.insert(InternalFormatInfoPair(GL_COMPRESSED_SRGB8_ETC2, CompressedFormat(4, 4, 64, 3, GL_COMPRESSED_SRGB8_ETC2, GL_UNSIGNED_BYTE, true, UnimplementedSupport, UnimplementedSupport, UnimplementedSupport))); map.insert(InternalFormatInfoPair(GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2, CompressedFormat(4, 4, 64, 3, GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2, GL_UNSIGNED_BYTE, false, UnimplementedSupport, UnimplementedSupport, UnimplementedSupport))); map.insert(InternalFormatInfoPair(GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2, CompressedFormat(4, 4, 64, 3, GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2, GL_UNSIGNED_BYTE, true, UnimplementedSupport, UnimplementedSupport, UnimplementedSupport))); map.insert(InternalFormatInfoPair(GL_COMPRESSED_RGBA8_ETC2_EAC, CompressedFormat(4, 4, 128, 4, GL_COMPRESSED_RGBA8_ETC2_EAC, GL_UNSIGNED_BYTE, false, UnimplementedSupport, UnimplementedSupport, UnimplementedSupport))); map.insert(InternalFormatInfoPair(GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC, CompressedFormat(4, 4, 128, 4, GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC, GL_UNSIGNED_BYTE, true, UnimplementedSupport, UnimplementedSupport, UnimplementedSupport))); // From GL_EXT_texture_compression_dxt1 // | Internal format | |W |H | BS |CC| Format | Type | SRGB | Supported | Renderable | Filterable | map.insert(InternalFormatInfoPair(GL_COMPRESSED_RGB_S3TC_DXT1_EXT, CompressedFormat(4, 4, 64, 3, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, GL_UNSIGNED_BYTE, false, RequireExt<&Extensions::textureCompressionDXT1>, NeverSupported, AlwaysSupported))); map.insert(InternalFormatInfoPair(GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, CompressedFormat(4, 4, 64, 4, GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, GL_UNSIGNED_BYTE, false, RequireExt<&Extensions::textureCompressionDXT1>, NeverSupported, AlwaysSupported))); // From GL_ANGLE_texture_compression_dxt3 map.insert(InternalFormatInfoPair(GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE, CompressedFormat(4, 4, 128, 4, GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE, GL_UNSIGNED_BYTE, false, RequireExt<&Extensions::textureCompressionDXT5>, NeverSupported, AlwaysSupported))); // From GL_ANGLE_texture_compression_dxt5 map.insert(InternalFormatInfoPair(GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE, CompressedFormat(4, 4, 128, 4, GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE, GL_UNSIGNED_BYTE, false, RequireExt<&Extensions::textureCompressionDXT5>, NeverSupported, AlwaysSupported))); // For STENCIL_INDEX8 we chose a normalized component type for the following reasons: // - Multisampled buffer are disallowed for non-normalized integer component types and we want to support it for STENCIL_INDEX8 // - All other stencil formats (all depth-stencil) are either float or normalized // - It affects only validation of internalformat in RenderbufferStorageMultisample. // | Internal format | |D |S |X | Format | Type | Component type | Supported | Renderable | Filterable | map.insert(InternalFormatInfoPair(GL_STENCIL_INDEX8, DepthStencilFormat(0, 8, 0, GL_DEPTH_STENCIL, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, RequireES<2>, RequireES<2>, NeverSupported))); return map; } static const InternalFormatInfoMap &GetInternalFormatMap() { static const InternalFormatInfoMap formatMap = BuildInternalFormatInfoMap(); return formatMap; } static FormatSet BuildAllSizedInternalFormatSet() { FormatSet result; const InternalFormatInfoMap &formats = GetInternalFormatMap(); for (InternalFormatInfoMap::const_iterator i = formats.begin(); i != formats.end(); i++) { if (i->second.pixelBytes > 0) { result.insert(i->first); } } return result; } const Type &GetTypeInfo(GLenum type) { switch (type) { case GL_UNSIGNED_BYTE: case GL_BYTE: { static const Type info = GenTypeInfo(1, false); return info; } case GL_UNSIGNED_SHORT: case GL_SHORT: case GL_HALF_FLOAT: case GL_HALF_FLOAT_OES: { static const Type info = GenTypeInfo(2, false); return info; } case GL_UNSIGNED_INT: case GL_INT: case GL_FLOAT: { static const Type info = GenTypeInfo(4, false); return info; } case GL_UNSIGNED_SHORT_5_6_5: case GL_UNSIGNED_SHORT_4_4_4_4: case GL_UNSIGNED_SHORT_5_5_5_1: case GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT: case GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT: { static const Type info = GenTypeInfo(2, true); return info; } case GL_UNSIGNED_INT_2_10_10_10_REV: case GL_UNSIGNED_INT_24_8: case GL_UNSIGNED_INT_10F_11F_11F_REV: case GL_UNSIGNED_INT_5_9_9_9_REV: { ASSERT(GL_UNSIGNED_INT_24_8_OES == GL_UNSIGNED_INT_24_8); static const Type info = GenTypeInfo(4, true); return info; } case GL_FLOAT_32_UNSIGNED_INT_24_8_REV: { static const Type info = GenTypeInfo(8, true); return info; } default: { static const Type defaultInfo; return defaultInfo; } } } const InternalFormat &GetInternalFormatInfo(GLenum internalFormat) { const InternalFormatInfoMap &formatMap = GetInternalFormatMap(); InternalFormatInfoMap::const_iterator iter = formatMap.find(internalFormat); if (iter != formatMap.end()) { return iter->second; } else { static const InternalFormat defaultInternalFormat; return defaultInternalFormat; } } GLuint InternalFormat::computeRowPitch(GLenum formatType, GLsizei width, GLint alignment, GLint rowLength) const { ASSERT(alignment > 0 && isPow2(alignment)); GLuint rowBytes; if (rowLength > 0) { ASSERT(!compressed); rowBytes = pixelBytes * rowLength; } else { rowBytes = computeBlockSize(formatType, width, 1); } return rx::roundUp(rowBytes, static_cast<GLuint>(alignment)); } GLuint InternalFormat::computeDepthPitch(GLenum formatType, GLsizei width, GLsizei height, GLint alignment, GLint rowLength) const { return computeRowPitch(formatType, width, alignment, rowLength) * height; } GLuint InternalFormat::computeBlockSize(GLenum formatType, GLsizei width, GLsizei height) const { if (compressed) { GLsizei numBlocksWide = (width + compressedBlockWidth - 1) / compressedBlockWidth; GLsizei numBlocksHight = (height + compressedBlockHeight - 1) / compressedBlockHeight; return (pixelBytes * numBlocksWide * numBlocksHight); } else { const Type &typeInfo = GetTypeInfo(formatType); if (typeInfo.specialInterpretation) { return typeInfo.bytes * width * height; } else { return componentCount * typeInfo.bytes * width * height; } } } GLenum GetSizedInternalFormat(GLenum internalFormat, GLenum type) { const InternalFormat& formatInfo = GetInternalFormatInfo(internalFormat); if (formatInfo.pixelBytes > 0) { return internalFormat; } else { static const FormatMap formatMap = BuildFormatMap(); FormatMap::const_iterator iter = formatMap.find(FormatTypePair(internalFormat, type)); if (iter != formatMap.end()) { return iter->second; } else { return GL_NONE; } } } const FormatSet &GetAllSizedInternalFormats() { static FormatSet formatSet = BuildAllSizedInternalFormatSet(); return formatSet; } }