diff options
Diffstat (limited to 'src/3rdparty/angle/src/libANGLE/formatutils.cpp')
| -rw-r--r-- | src/3rdparty/angle/src/libANGLE/formatutils.cpp | 650 |
1 files changed, 650 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/libANGLE/formatutils.cpp b/src/3rdparty/angle/src/libANGLE/formatutils.cpp new file mode 100644 index 0000000000..51e6a5a65d --- /dev/null +++ b/src/3rdparty/angle/src/libANGLE/formatutils.cpp @@ -0,0 +1,650 @@ +// +// 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; +} + +} |