diff options
Diffstat (limited to 'src/3rdparty/angle/src/libGLESv2/formatutils.cpp')
| -rw-r--r-- | src/3rdparty/angle/src/libGLESv2/formatutils.cpp | 1548 |
1 files changed, 1548 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/libGLESv2/formatutils.cpp b/src/3rdparty/angle/src/libGLESv2/formatutils.cpp new file mode 100644 index 0000000000..8cc2e19a83 --- /dev/null +++ b/src/3rdparty/angle/src/libGLESv2/formatutils.cpp @@ -0,0 +1,1548 @@ +#include "precompiled.h" +// +// 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 "libGLESv2/formatutils.h" +#include "libGLESv2/Context.h" +#include "libGLESv2/Framebuffer.h" +#include "libGLESv2/renderer/Renderer.h" +#include "libGLESv2/renderer/imageformats.h" +#include "libGLESv2/renderer/copyimage.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. + +struct FormatTypeInfo +{ + GLenum mInternalFormat; + ColorWriteFunction mColorWriteFunction; + + FormatTypeInfo(GLenum internalFormat, ColorWriteFunction writeFunc) + : mInternalFormat(internalFormat), mColorWriteFunction(writeFunc) + { } +}; + +typedef std::pair<GLenum, GLenum> FormatTypePair; +typedef std::pair<FormatTypePair, FormatTypeInfo> FormatPair; +typedef std::map<FormatTypePair, FormatTypeInfo> 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, ColorWriteFunction writeFunc) +{ + map->insert(FormatPair(FormatTypePair(format, type), FormatTypeInfo(internalFormat, writeFunc))); +} + +FormatMap BuildFormatMap() +{ + FormatMap map; + + using namespace rx; + + // | Format | Type | Internal format | Color write function | + InsertFormatMapping(&map, GL_RGBA, GL_UNSIGNED_BYTE, GL_RGBA8, WriteColor<R8G8B8A8, GLfloat> ); + InsertFormatMapping(&map, GL_RGBA, GL_BYTE, GL_RGBA8_SNORM, WriteColor<R8G8B8A8S, GLfloat> ); + InsertFormatMapping(&map, GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4, GL_RGBA4, WriteColor<R4G4B4A4, GLfloat> ); + InsertFormatMapping(&map, GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1, GL_RGB5_A1, WriteColor<R5G5B5A1, GLfloat> ); + InsertFormatMapping(&map, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, GL_RGB10_A2, WriteColor<R10G10B10A2, GLfloat> ); + InsertFormatMapping(&map, GL_RGBA, GL_FLOAT, GL_RGBA32F, WriteColor<R32G32B32A32F, GLfloat>); + InsertFormatMapping(&map, GL_RGBA, GL_HALF_FLOAT, GL_RGBA16F, WriteColor<R16G16B16A16F, GLfloat>); + InsertFormatMapping(&map, GL_RGBA, GL_HALF_FLOAT_OES, GL_RGBA16F, WriteColor<R16G16B16A16F, GLfloat>); + + InsertFormatMapping(&map, GL_RGBA_INTEGER, GL_UNSIGNED_BYTE, GL_RGBA8UI, WriteColor<R8G8B8A8, GLuint> ); + InsertFormatMapping(&map, GL_RGBA_INTEGER, GL_BYTE, GL_RGBA8I, WriteColor<R8G8B8A8S, GLint> ); + InsertFormatMapping(&map, GL_RGBA_INTEGER, GL_UNSIGNED_SHORT, GL_RGBA16UI, WriteColor<R16G16B16A16, GLuint> ); + InsertFormatMapping(&map, GL_RGBA_INTEGER, GL_SHORT, GL_RGBA16I, WriteColor<R16G16B16A16S, GLint> ); + InsertFormatMapping(&map, GL_RGBA_INTEGER, GL_UNSIGNED_INT, GL_RGBA32UI, WriteColor<R32G32B32A32, GLuint> ); + InsertFormatMapping(&map, GL_RGBA_INTEGER, GL_INT, GL_RGBA32I, WriteColor<R32G32B32A32S, GLint> ); + InsertFormatMapping(&map, GL_RGBA_INTEGER, GL_UNSIGNED_INT_2_10_10_10_REV, GL_RGB10_A2UI, WriteColor<R10G10B10A2, GLuint> ); + + InsertFormatMapping(&map, GL_RGB, GL_UNSIGNED_BYTE, GL_RGB8, WriteColor<R8G8B8, GLfloat> ); + InsertFormatMapping(&map, GL_RGB, GL_BYTE, GL_RGB8_SNORM, WriteColor<R8G8B8S, GLfloat> ); + InsertFormatMapping(&map, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, GL_RGB565, WriteColor<R5G6B5, GLfloat> ); + InsertFormatMapping(&map, GL_RGB, GL_UNSIGNED_INT_10F_11F_11F_REV, GL_R11F_G11F_B10F, WriteColor<R11G11B10F, GLfloat> ); + InsertFormatMapping(&map, GL_RGB, GL_UNSIGNED_INT_5_9_9_9_REV, GL_RGB9_E5, WriteColor<R9G9B9E5, GLfloat> ); + InsertFormatMapping(&map, GL_RGB, GL_FLOAT, GL_RGB32F, WriteColor<R32G32B32F, GLfloat> ); + InsertFormatMapping(&map, GL_RGB, GL_HALF_FLOAT, GL_RGB16F, WriteColor<R16G16B16F, GLfloat> ); + InsertFormatMapping(&map, GL_RGB, GL_HALF_FLOAT_OES, GL_RGB16F, WriteColor<R16G16B16F, GLfloat> ); + + InsertFormatMapping(&map, GL_RGB_INTEGER, GL_UNSIGNED_BYTE, GL_RGB8UI, WriteColor<R8G8B8, GLuint> ); + InsertFormatMapping(&map, GL_RGB_INTEGER, GL_BYTE, GL_RGB8I, WriteColor<R8G8B8S, GLint> ); + InsertFormatMapping(&map, GL_RGB_INTEGER, GL_UNSIGNED_SHORT, GL_RGB16UI, WriteColor<R16G16B16, GLuint> ); + InsertFormatMapping(&map, GL_RGB_INTEGER, GL_SHORT, GL_RGB16I, WriteColor<R16G16B16S, GLint> ); + InsertFormatMapping(&map, GL_RGB_INTEGER, GL_UNSIGNED_INT, GL_RGB32UI, WriteColor<R32G32B32, GLuint> ); + InsertFormatMapping(&map, GL_RGB_INTEGER, GL_INT, GL_RGB32I, WriteColor<R32G32B32S, GLint> ); + + InsertFormatMapping(&map, GL_RG, GL_UNSIGNED_BYTE, GL_RG8, WriteColor<R8G8, GLfloat> ); + InsertFormatMapping(&map, GL_RG, GL_BYTE, GL_RG8_SNORM, WriteColor<R8G8S, GLfloat> ); + InsertFormatMapping(&map, GL_RG, GL_FLOAT, GL_RG32F, WriteColor<R32G32F, GLfloat> ); + InsertFormatMapping(&map, GL_RG, GL_HALF_FLOAT, GL_RG16F, WriteColor<R16G16F, GLfloat> ); + InsertFormatMapping(&map, GL_RG, GL_HALF_FLOAT_OES, GL_RG16F, WriteColor<R16G16F, GLfloat> ); + + InsertFormatMapping(&map, GL_RG_INTEGER, GL_UNSIGNED_BYTE, GL_RG8UI, WriteColor<R8G8, GLuint> ); + InsertFormatMapping(&map, GL_RG_INTEGER, GL_BYTE, GL_RG8I, WriteColor<R8G8S, GLint> ); + InsertFormatMapping(&map, GL_RG_INTEGER, GL_UNSIGNED_SHORT, GL_RG16UI, WriteColor<R16G16, GLuint> ); + InsertFormatMapping(&map, GL_RG_INTEGER, GL_SHORT, GL_RG16I, WriteColor<R16G16S, GLint> ); + InsertFormatMapping(&map, GL_RG_INTEGER, GL_UNSIGNED_INT, GL_RG32UI, WriteColor<R32G32, GLuint> ); + InsertFormatMapping(&map, GL_RG_INTEGER, GL_INT, GL_RG32I, WriteColor<R32G32S, GLint> ); + + InsertFormatMapping(&map, GL_RED, GL_UNSIGNED_BYTE, GL_R8, WriteColor<R8, GLfloat> ); + InsertFormatMapping(&map, GL_RED, GL_BYTE, GL_R8_SNORM, WriteColor<R8S, GLfloat> ); + InsertFormatMapping(&map, GL_RED, GL_FLOAT, GL_R32F, WriteColor<R32F, GLfloat> ); + InsertFormatMapping(&map, GL_RED, GL_HALF_FLOAT, GL_R16F, WriteColor<R16F, GLfloat> ); + InsertFormatMapping(&map, GL_RED, GL_HALF_FLOAT_OES, GL_R16F, WriteColor<R16F, GLfloat> ); + + InsertFormatMapping(&map, GL_RED_INTEGER, GL_UNSIGNED_BYTE, GL_R8UI, WriteColor<R8, GLuint> ); + InsertFormatMapping(&map, GL_RED_INTEGER, GL_BYTE, GL_R8I, WriteColor<R8S, GLint> ); + InsertFormatMapping(&map, GL_RED_INTEGER, GL_UNSIGNED_SHORT, GL_R16UI, WriteColor<R16, GLuint> ); + InsertFormatMapping(&map, GL_RED_INTEGER, GL_SHORT, GL_R16I, WriteColor<R16S, GLint> ); + InsertFormatMapping(&map, GL_RED_INTEGER, GL_UNSIGNED_INT, GL_R32UI, WriteColor<R32, GLuint> ); + InsertFormatMapping(&map, GL_RED_INTEGER, GL_INT, GL_R32I, WriteColor<R32S, GLint> ); + + InsertFormatMapping(&map, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, GL_LUMINANCE8_ALPHA8_EXT, WriteColor<L8A8, GLfloat> ); + InsertFormatMapping(&map, GL_LUMINANCE, GL_UNSIGNED_BYTE, GL_LUMINANCE8_EXT, WriteColor<L8, GLfloat> ); + InsertFormatMapping(&map, GL_ALPHA, GL_UNSIGNED_BYTE, GL_ALPHA8_EXT, WriteColor<A8, GLfloat> ); + InsertFormatMapping(&map, GL_LUMINANCE_ALPHA, GL_FLOAT, GL_LUMINANCE_ALPHA32F_EXT, WriteColor<L32A32F, GLfloat> ); + InsertFormatMapping(&map, GL_LUMINANCE, GL_FLOAT, GL_LUMINANCE32F_EXT, WriteColor<L32F, GLfloat> ); + InsertFormatMapping(&map, GL_ALPHA, GL_FLOAT, GL_ALPHA32F_EXT, WriteColor<A32F, GLfloat> ); + InsertFormatMapping(&map, GL_LUMINANCE_ALPHA, GL_HALF_FLOAT, GL_LUMINANCE_ALPHA16F_EXT, WriteColor<L16A16F, GLfloat> ); + InsertFormatMapping(&map, GL_LUMINANCE_ALPHA, GL_HALF_FLOAT_OES, GL_LUMINANCE_ALPHA16F_EXT, WriteColor<L16A16F, GLfloat> ); + InsertFormatMapping(&map, GL_LUMINANCE, GL_HALF_FLOAT, GL_LUMINANCE16F_EXT, WriteColor<L16F, GLfloat> ); + InsertFormatMapping(&map, GL_LUMINANCE, GL_HALF_FLOAT_OES, GL_LUMINANCE16F_EXT, WriteColor<L16F, GLfloat> ); + InsertFormatMapping(&map, GL_ALPHA, GL_HALF_FLOAT, GL_ALPHA16F_EXT, WriteColor<A16F, GLfloat> ); + InsertFormatMapping(&map, GL_ALPHA, GL_HALF_FLOAT_OES, GL_ALPHA16F_EXT, WriteColor<A16F, GLfloat> ); + + InsertFormatMapping(&map, GL_BGRA_EXT, GL_UNSIGNED_BYTE, GL_BGRA8_EXT, WriteColor<B8G8R8A8, GLfloat> ); + InsertFormatMapping(&map, GL_BGRA_EXT, GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT, GL_BGRA4_ANGLEX, WriteColor<B4G4R4A4, GLfloat> ); + InsertFormatMapping(&map, GL_BGRA_EXT, GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT, GL_BGR5_A1_ANGLEX, WriteColor<B5G5R5A1, GLfloat> ); + + InsertFormatMapping(&map, GL_SRGB_EXT, GL_UNSIGNED_BYTE, GL_SRGB8, WriteColor<R8G8B8, GLfloat> ); + InsertFormatMapping(&map, GL_SRGB_ALPHA_EXT, GL_UNSIGNED_BYTE, GL_SRGB8_ALPHA8, WriteColor<R8G8B8A8, GLfloat> ); + + InsertFormatMapping(&map, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, GL_UNSIGNED_BYTE, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, NULL ); + InsertFormatMapping(&map, GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, GL_UNSIGNED_BYTE, GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, NULL ); + InsertFormatMapping(&map, GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE, GL_UNSIGNED_BYTE, GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE, NULL ); + InsertFormatMapping(&map, GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE, GL_UNSIGNED_BYTE, GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE, NULL ); + + InsertFormatMapping(&map, GL_DEPTH_COMPONENT, GL_UNSIGNED_SHORT, GL_DEPTH_COMPONENT16, NULL ); + InsertFormatMapping(&map, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, GL_DEPTH_COMPONENT32_OES, NULL ); + InsertFormatMapping(&map, GL_DEPTH_COMPONENT, GL_FLOAT, GL_DEPTH_COMPONENT32F, NULL ); + + InsertFormatMapping(&map, GL_STENCIL, GL_UNSIGNED_BYTE, GL_STENCIL_INDEX8, NULL ); + + InsertFormatMapping(&map, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, GL_DEPTH24_STENCIL8, NULL ); + InsertFormatMapping(&map, GL_DEPTH_STENCIL, GL_FLOAT_32_UNSIGNED_INT_24_8_REV, GL_DEPTH32F_STENCIL8, NULL ); + + return map; +} + +static const FormatMap &GetFormatMap() +{ + static const FormatMap formatMap = BuildFormatMap(); + return formatMap; +} + +struct FormatInfo +{ + GLenum mInternalformat; + GLenum mFormat; + GLenum mType; + + FormatInfo(GLenum internalformat, GLenum format, GLenum type) + : mInternalformat(internalformat), mFormat(format), mType(type) { } + + bool operator<(const FormatInfo& other) const + { + return memcmp(this, &other, sizeof(FormatInfo)) < 0; + } +}; + +// ES3 has a specific set of permutations of internal formats, formats and types which are acceptable. +typedef std::set<FormatInfo> ES3FormatSet; + +ES3FormatSet BuildES3FormatSet() +{ + ES3FormatSet set; + + // Format combinations from ES 3.0.1 spec, table 3.2 + + // | Internal format | Format | Type | + // | | | | + set.insert(FormatInfo(GL_RGBA8, GL_RGBA, GL_UNSIGNED_BYTE )); + set.insert(FormatInfo(GL_RGB5_A1, GL_RGBA, GL_UNSIGNED_BYTE )); + set.insert(FormatInfo(GL_RGBA4, GL_RGBA, GL_UNSIGNED_BYTE )); + set.insert(FormatInfo(GL_SRGB8_ALPHA8, GL_RGBA, GL_UNSIGNED_BYTE )); + set.insert(FormatInfo(GL_RGBA8_SNORM, GL_RGBA, GL_BYTE )); + set.insert(FormatInfo(GL_RGBA4, GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4 )); + set.insert(FormatInfo(GL_RGB10_A2, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV )); + set.insert(FormatInfo(GL_RGB5_A1, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV )); + set.insert(FormatInfo(GL_RGB5_A1, GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1 )); + set.insert(FormatInfo(GL_RGBA16F, GL_RGBA, GL_HALF_FLOAT )); + set.insert(FormatInfo(GL_RGBA16F, GL_RGBA, GL_HALF_FLOAT_OES )); + set.insert(FormatInfo(GL_RGBA32F, GL_RGBA, GL_FLOAT )); + set.insert(FormatInfo(GL_RGBA16F, GL_RGBA, GL_FLOAT )); + set.insert(FormatInfo(GL_RGBA8UI, GL_RGBA_INTEGER, GL_UNSIGNED_BYTE )); + set.insert(FormatInfo(GL_RGBA8I, GL_RGBA_INTEGER, GL_BYTE )); + set.insert(FormatInfo(GL_RGBA16UI, GL_RGBA_INTEGER, GL_UNSIGNED_SHORT )); + set.insert(FormatInfo(GL_RGBA16I, GL_RGBA_INTEGER, GL_SHORT )); + set.insert(FormatInfo(GL_RGBA32UI, GL_RGBA_INTEGER, GL_UNSIGNED_INT )); + set.insert(FormatInfo(GL_RGBA32I, GL_RGBA_INTEGER, GL_INT )); + set.insert(FormatInfo(GL_RGB10_A2UI, GL_RGBA_INTEGER, GL_UNSIGNED_INT_2_10_10_10_REV )); + set.insert(FormatInfo(GL_RGB8, GL_RGB, GL_UNSIGNED_BYTE )); + set.insert(FormatInfo(GL_RGB565, GL_RGB, GL_UNSIGNED_BYTE )); + set.insert(FormatInfo(GL_SRGB8, GL_RGB, GL_UNSIGNED_BYTE )); + set.insert(FormatInfo(GL_RGB8_SNORM, GL_RGB, GL_BYTE )); + set.insert(FormatInfo(GL_RGB565, GL_RGB, GL_UNSIGNED_SHORT_5_6_5 )); + set.insert(FormatInfo(GL_R11F_G11F_B10F, GL_RGB, GL_UNSIGNED_INT_10F_11F_11F_REV )); + set.insert(FormatInfo(GL_RGB9_E5, GL_RGB, GL_UNSIGNED_INT_5_9_9_9_REV )); + set.insert(FormatInfo(GL_RGB16F, GL_RGB, GL_HALF_FLOAT )); + set.insert(FormatInfo(GL_RGB16F, GL_RGB, GL_HALF_FLOAT_OES )); + set.insert(FormatInfo(GL_R11F_G11F_B10F, GL_RGB, GL_HALF_FLOAT )); + set.insert(FormatInfo(GL_R11F_G11F_B10F, GL_RGB, GL_HALF_FLOAT_OES )); + set.insert(FormatInfo(GL_RGB9_E5, GL_RGB, GL_HALF_FLOAT )); + set.insert(FormatInfo(GL_RGB9_E5, GL_RGB, GL_HALF_FLOAT_OES )); + set.insert(FormatInfo(GL_RGB32F, GL_RGB, GL_FLOAT )); + set.insert(FormatInfo(GL_RGB16F, GL_RGB, GL_FLOAT )); + set.insert(FormatInfo(GL_R11F_G11F_B10F, GL_RGB, GL_FLOAT )); + set.insert(FormatInfo(GL_RGB9_E5, GL_RGB, GL_FLOAT )); + set.insert(FormatInfo(GL_RGB8UI, GL_RGB_INTEGER, GL_UNSIGNED_BYTE )); + set.insert(FormatInfo(GL_RGB8I, GL_RGB_INTEGER, GL_BYTE )); + set.insert(FormatInfo(GL_RGB16UI, GL_RGB_INTEGER, GL_UNSIGNED_SHORT )); + set.insert(FormatInfo(GL_RGB16I, GL_RGB_INTEGER, GL_SHORT )); + set.insert(FormatInfo(GL_RGB32UI, GL_RGB_INTEGER, GL_UNSIGNED_INT )); + set.insert(FormatInfo(GL_RGB32I, GL_RGB_INTEGER, GL_INT )); + set.insert(FormatInfo(GL_RG8, GL_RG, GL_UNSIGNED_BYTE )); + set.insert(FormatInfo(GL_RG8_SNORM, GL_RG, GL_BYTE )); + set.insert(FormatInfo(GL_RG16F, GL_RG, GL_HALF_FLOAT )); + set.insert(FormatInfo(GL_RG16F, GL_RG, GL_HALF_FLOAT_OES )); + set.insert(FormatInfo(GL_RG32F, GL_RG, GL_FLOAT )); + set.insert(FormatInfo(GL_RG16F, GL_RG, GL_FLOAT )); + set.insert(FormatInfo(GL_RG8UI, GL_RG_INTEGER, GL_UNSIGNED_BYTE )); + set.insert(FormatInfo(GL_RG8I, GL_RG_INTEGER, GL_BYTE )); + set.insert(FormatInfo(GL_RG16UI, GL_RG_INTEGER, GL_UNSIGNED_SHORT )); + set.insert(FormatInfo(GL_RG16I, GL_RG_INTEGER, GL_SHORT )); + set.insert(FormatInfo(GL_RG32UI, GL_RG_INTEGER, GL_UNSIGNED_INT )); + set.insert(FormatInfo(GL_RG32I, GL_RG_INTEGER, GL_INT )); + set.insert(FormatInfo(GL_R8, GL_RED, GL_UNSIGNED_BYTE )); + set.insert(FormatInfo(GL_R8_SNORM, GL_RED, GL_BYTE )); + set.insert(FormatInfo(GL_R16F, GL_RED, GL_HALF_FLOAT )); + set.insert(FormatInfo(GL_R16F, GL_RED, GL_HALF_FLOAT_OES )); + set.insert(FormatInfo(GL_R32F, GL_RED, GL_FLOAT )); + set.insert(FormatInfo(GL_R16F, GL_RED, GL_FLOAT )); + set.insert(FormatInfo(GL_R8UI, GL_RED_INTEGER, GL_UNSIGNED_BYTE )); + set.insert(FormatInfo(GL_R8I, GL_RED_INTEGER, GL_BYTE )); + set.insert(FormatInfo(GL_R16UI, GL_RED_INTEGER, GL_UNSIGNED_SHORT )); + set.insert(FormatInfo(GL_R16I, GL_RED_INTEGER, GL_SHORT )); + set.insert(FormatInfo(GL_R32UI, GL_RED_INTEGER, GL_UNSIGNED_INT )); + set.insert(FormatInfo(GL_R32I, GL_RED_INTEGER, GL_INT )); + + // Unsized formats + set.insert(FormatInfo(GL_RGBA, GL_RGBA, GL_UNSIGNED_BYTE )); + set.insert(FormatInfo(GL_RGBA, GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4 )); + set.insert(FormatInfo(GL_RGBA, GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1 )); + set.insert(FormatInfo(GL_RGB, GL_RGB, GL_UNSIGNED_BYTE )); + set.insert(FormatInfo(GL_RGB, GL_RGB, GL_UNSIGNED_SHORT_5_6_5 )); + set.insert(FormatInfo(GL_LUMINANCE_ALPHA, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE )); + set.insert(FormatInfo(GL_LUMINANCE, GL_LUMINANCE, GL_UNSIGNED_BYTE )); + set.insert(FormatInfo(GL_ALPHA, GL_ALPHA, GL_UNSIGNED_BYTE )); + set.insert(FormatInfo(GL_SRGB_ALPHA_EXT, GL_SRGB_ALPHA_EXT, GL_UNSIGNED_BYTE )); + set.insert(FormatInfo(GL_SRGB_EXT, GL_SRGB_EXT, GL_UNSIGNED_BYTE )); + + // Depth stencil formats + set.insert(FormatInfo(GL_DEPTH_COMPONENT16, GL_DEPTH_COMPONENT, GL_UNSIGNED_SHORT )); + set.insert(FormatInfo(GL_DEPTH_COMPONENT24, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT )); + set.insert(FormatInfo(GL_DEPTH_COMPONENT16, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT )); + set.insert(FormatInfo(GL_DEPTH_COMPONENT32F, GL_DEPTH_COMPONENT, GL_FLOAT )); + set.insert(FormatInfo(GL_DEPTH24_STENCIL8, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8 )); + set.insert(FormatInfo(GL_DEPTH32F_STENCIL8, GL_DEPTH_STENCIL, GL_FLOAT_32_UNSIGNED_INT_24_8_REV)); + + // From GL_EXT_sRGB + set.insert(FormatInfo(GL_SRGB8_ALPHA8_EXT, GL_SRGB_ALPHA_EXT, GL_UNSIGNED_BYTE )); + set.insert(FormatInfo(GL_SRGB8, GL_SRGB_EXT, GL_UNSIGNED_BYTE )); + + // From GL_OES_texture_float + set.insert(FormatInfo(GL_LUMINANCE_ALPHA, GL_LUMINANCE_ALPHA, GL_FLOAT )); + set.insert(FormatInfo(GL_LUMINANCE, GL_LUMINANCE, GL_FLOAT )); + set.insert(FormatInfo(GL_ALPHA, GL_ALPHA, GL_FLOAT )); + + // From GL_OES_texture_half_float + set.insert(FormatInfo(GL_LUMINANCE_ALPHA, GL_LUMINANCE_ALPHA, GL_HALF_FLOAT )); + set.insert(FormatInfo(GL_LUMINANCE_ALPHA, GL_LUMINANCE_ALPHA, GL_HALF_FLOAT_OES )); + set.insert(FormatInfo(GL_LUMINANCE, GL_LUMINANCE, GL_HALF_FLOAT )); + set.insert(FormatInfo(GL_LUMINANCE, GL_LUMINANCE, GL_HALF_FLOAT_OES )); + set.insert(FormatInfo(GL_ALPHA, GL_ALPHA, GL_HALF_FLOAT )); + set.insert(FormatInfo(GL_ALPHA, GL_ALPHA, GL_HALF_FLOAT_OES )); + + // From GL_EXT_texture_format_BGRA8888 + set.insert(FormatInfo(GL_BGRA_EXT, GL_BGRA_EXT, GL_UNSIGNED_BYTE )); + + // From GL_EXT_texture_storage + // | Internal format | Format | Type | + // | | | | + set.insert(FormatInfo(GL_ALPHA8_EXT, GL_ALPHA, GL_UNSIGNED_BYTE )); + set.insert(FormatInfo(GL_LUMINANCE8_EXT, GL_LUMINANCE, GL_UNSIGNED_BYTE )); + set.insert(FormatInfo(GL_LUMINANCE8_ALPHA8_EXT, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE )); + set.insert(FormatInfo(GL_ALPHA32F_EXT, GL_ALPHA, GL_FLOAT )); + set.insert(FormatInfo(GL_LUMINANCE32F_EXT, GL_LUMINANCE, GL_FLOAT )); + set.insert(FormatInfo(GL_LUMINANCE_ALPHA32F_EXT, GL_LUMINANCE_ALPHA, GL_FLOAT )); + set.insert(FormatInfo(GL_ALPHA16F_EXT, GL_ALPHA, GL_HALF_FLOAT )); + set.insert(FormatInfo(GL_ALPHA16F_EXT, GL_ALPHA, GL_HALF_FLOAT_OES )); + set.insert(FormatInfo(GL_LUMINANCE16F_EXT, GL_LUMINANCE, GL_HALF_FLOAT )); + set.insert(FormatInfo(GL_LUMINANCE16F_EXT, GL_LUMINANCE, GL_HALF_FLOAT_OES )); + set.insert(FormatInfo(GL_LUMINANCE_ALPHA16F_EXT, GL_LUMINANCE_ALPHA, GL_HALF_FLOAT )); + set.insert(FormatInfo(GL_LUMINANCE_ALPHA16F_EXT, GL_LUMINANCE_ALPHA, GL_HALF_FLOAT_OES )); + + // From GL_EXT_texture_storage and GL_EXT_texture_format_BGRA8888 + set.insert(FormatInfo(GL_BGRA8_EXT, GL_BGRA_EXT, GL_UNSIGNED_BYTE )); + set.insert(FormatInfo(GL_BGRA4_ANGLEX, GL_BGRA_EXT, GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT)); + set.insert(FormatInfo(GL_BGRA4_ANGLEX, GL_BGRA_EXT, GL_UNSIGNED_BYTE )); + set.insert(FormatInfo(GL_BGR5_A1_ANGLEX, GL_BGRA_EXT, GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT)); + set.insert(FormatInfo(GL_BGR5_A1_ANGLEX, GL_BGRA_EXT, GL_UNSIGNED_BYTE )); + + // From GL_ANGLE_depth_texture + set.insert(FormatInfo(GL_DEPTH_COMPONENT32_OES, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT_24_8_OES )); + + // Compressed formats + // From ES 3.0.1 spec, table 3.16 + // | Internal format | Format | Type | + // | | | | + set.insert(FormatInfo(GL_COMPRESSED_R11_EAC, GL_COMPRESSED_R11_EAC, GL_UNSIGNED_BYTE)); + set.insert(FormatInfo(GL_COMPRESSED_R11_EAC, GL_COMPRESSED_R11_EAC, GL_UNSIGNED_BYTE)); + set.insert(FormatInfo(GL_COMPRESSED_SIGNED_R11_EAC, GL_COMPRESSED_SIGNED_R11_EAC, GL_UNSIGNED_BYTE)); + set.insert(FormatInfo(GL_COMPRESSED_RG11_EAC, GL_COMPRESSED_RG11_EAC, GL_UNSIGNED_BYTE)); + set.insert(FormatInfo(GL_COMPRESSED_SIGNED_RG11_EAC, GL_COMPRESSED_SIGNED_RG11_EAC, GL_UNSIGNED_BYTE)); + set.insert(FormatInfo(GL_COMPRESSED_RGB8_ETC2, GL_COMPRESSED_RGB8_ETC2, GL_UNSIGNED_BYTE)); + set.insert(FormatInfo(GL_COMPRESSED_SRGB8_ETC2, GL_COMPRESSED_SRGB8_ETC2, GL_UNSIGNED_BYTE)); + set.insert(FormatInfo(GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2, GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2, GL_UNSIGNED_BYTE)); + set.insert(FormatInfo(GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2, GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2, GL_UNSIGNED_BYTE)); + set.insert(FormatInfo(GL_COMPRESSED_RGBA8_ETC2_EAC, GL_COMPRESSED_RGBA8_ETC2_EAC, GL_UNSIGNED_BYTE)); + set.insert(FormatInfo(GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC, GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC, GL_UNSIGNED_BYTE)); + + + // From GL_EXT_texture_compression_dxt1 + set.insert(FormatInfo(GL_COMPRESSED_RGB_S3TC_DXT1_EXT, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, GL_UNSIGNED_BYTE)); + set.insert(FormatInfo(GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, GL_UNSIGNED_BYTE)); + + // From GL_ANGLE_texture_compression_dxt3 + set.insert(FormatInfo(GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE, GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE, GL_UNSIGNED_BYTE)); + + // From GL_ANGLE_texture_compression_dxt5 + set.insert(FormatInfo(GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE, GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE, GL_UNSIGNED_BYTE)); + + return set; +} + +static const ES3FormatSet &GetES3FormatSet() +{ + static const ES3FormatSet es3FormatSet = BuildES3FormatSet(); + return es3FormatSet; +} + +// Map of sizes of input types +struct TypeInfo +{ + GLuint mTypeBytes; + bool mSpecialInterpretation; + + TypeInfo() + : mTypeBytes(0), mSpecialInterpretation(false) { } + + TypeInfo(GLuint typeBytes, bool specialInterpretation) + : mTypeBytes(typeBytes), mSpecialInterpretation(specialInterpretation) { } + + bool operator<(const TypeInfo& other) const + { + return memcmp(this, &other, sizeof(TypeInfo)) < 0; + } +}; + +typedef std::pair<GLenum, TypeInfo> TypeInfoPair; +typedef std::map<GLenum, TypeInfo> TypeInfoMap; + +static TypeInfoMap BuildTypeInfoMap() +{ + TypeInfoMap map; + + map.insert(TypeInfoPair(GL_UNSIGNED_BYTE, TypeInfo( 1, false))); + map.insert(TypeInfoPair(GL_BYTE, TypeInfo( 1, false))); + map.insert(TypeInfoPair(GL_UNSIGNED_SHORT, TypeInfo( 2, false))); + map.insert(TypeInfoPair(GL_SHORT, TypeInfo( 2, false))); + map.insert(TypeInfoPair(GL_UNSIGNED_INT, TypeInfo( 4, false))); + map.insert(TypeInfoPair(GL_INT, TypeInfo( 4, false))); + map.insert(TypeInfoPair(GL_HALF_FLOAT, TypeInfo( 2, false))); + map.insert(TypeInfoPair(GL_HALF_FLOAT_OES, TypeInfo( 2, false))); + map.insert(TypeInfoPair(GL_FLOAT, TypeInfo( 4, false))); + map.insert(TypeInfoPair(GL_UNSIGNED_SHORT_5_6_5, TypeInfo( 2, true ))); + map.insert(TypeInfoPair(GL_UNSIGNED_SHORT_4_4_4_4, TypeInfo( 2, true ))); + map.insert(TypeInfoPair(GL_UNSIGNED_SHORT_5_5_5_1, TypeInfo( 2, true ))); + map.insert(TypeInfoPair(GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT, TypeInfo( 2, true ))); + map.insert(TypeInfoPair(GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT, TypeInfo( 2, true ))); + map.insert(TypeInfoPair(GL_UNSIGNED_INT_2_10_10_10_REV, TypeInfo( 4, true ))); + map.insert(TypeInfoPair(GL_UNSIGNED_INT_24_8, TypeInfo( 4, true ))); + map.insert(TypeInfoPair(GL_UNSIGNED_INT_10F_11F_11F_REV, TypeInfo( 4, true ))); + map.insert(TypeInfoPair(GL_UNSIGNED_INT_5_9_9_9_REV, TypeInfo( 4, true ))); + map.insert(TypeInfoPair(GL_UNSIGNED_INT_24_8_OES, TypeInfo( 4, true ))); + map.insert(TypeInfoPair(GL_FLOAT_32_UNSIGNED_INT_24_8_REV, TypeInfo( 8, true ))); + + return map; +} + +static bool GetTypeInfo(GLenum type, TypeInfo *outTypeInfo) +{ + static const TypeInfoMap infoMap = BuildTypeInfoMap(); + TypeInfoMap::const_iterator iter = infoMap.find(type); + if (iter != infoMap.end()) + { + if (outTypeInfo) + { + *outTypeInfo = iter->second; + } + return true; + } + else + { + return false; + } +} + +// Information about internal formats +typedef bool(*SupportCheckFunction)(GLuint, const Extensions &); + +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 RequireESVersion(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 RequireExtension(GLuint, const Extensions & extensions) +{ + return extensions.*bool1; +} + +// Check for a minimum client version or a single extension +template <GLuint minCoreGLVersion, ExtensionBool bool1> +static bool RequireESVersionOrExtension(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 RequireESVersionOrExtensions(GLuint clientVersion, const Extensions &extensions) +{ + return clientVersion >= minCoreGLVersion || (extensions.*bool1 || extensions.*bool2); +} + +// Check support for two extensions +template <ExtensionBool bool1, ExtensionBool bool2> +static bool RequireExtensions(GLuint, const Extensions &extensions) +{ + return extensions.*bool1 || extensions.*bool2; +} + +struct InternalFormatInfo +{ + GLuint mRedBits; + GLuint mGreenBits; + GLuint mBlueBits; + + GLuint mLuminanceBits; + + GLuint mAlphaBits; + GLuint mSharedBits; + + GLuint mDepthBits; + GLuint mStencilBits; + + GLuint mPixelBits; + + GLuint mComponentCount; + + GLuint mCompressedBlockWidth; + GLuint mCompressedBlockHeight; + + GLenum mFormat; + GLenum mType; + + GLenum mComponentType; + GLenum mColorEncoding; + + bool mIsCompressed; + + SupportCheckFunction mTextureSupportFunction; + SupportCheckFunction mRenderSupportFunction; + SupportCheckFunction mFilterSupportFunction; + + InternalFormatInfo() : mRedBits(0), mGreenBits(0), mBlueBits(0), mLuminanceBits(0), mAlphaBits(0), mSharedBits(0), mDepthBits(0), mStencilBits(0), + mPixelBits(0), mComponentCount(0), mCompressedBlockWidth(0), mCompressedBlockHeight(0), mFormat(GL_NONE), mType(GL_NONE), + mComponentType(GL_NONE), mColorEncoding(GL_NONE), mIsCompressed(false), mTextureSupportFunction(NeverSupported), + mRenderSupportFunction(NeverSupported), mFilterSupportFunction(NeverSupported) + { + } + + static InternalFormatInfo UnsizedFormat(GLenum format, SupportCheckFunction textureSupport, SupportCheckFunction renderSupport, + SupportCheckFunction filterSupport) + { + InternalFormatInfo formatInfo; + formatInfo.mFormat = format; + formatInfo.mTextureSupportFunction = textureSupport; + formatInfo.mRenderSupportFunction = renderSupport; + formatInfo.mFilterSupportFunction = filterSupport; + return formatInfo; + } + + static InternalFormatInfo RGBAFormat(GLuint red, GLuint green, GLuint blue, GLuint alpha, GLuint shared, + GLenum format, GLenum type, GLenum componentType, bool srgb, + SupportCheckFunction textureSupport, SupportCheckFunction renderSupport, + SupportCheckFunction filterSupport) + { + InternalFormatInfo formatInfo; + formatInfo.mRedBits = red; + formatInfo.mGreenBits = green; + formatInfo.mBlueBits = blue; + formatInfo.mAlphaBits = alpha; + formatInfo.mSharedBits = shared; + formatInfo.mPixelBits = red + green + blue + alpha + shared; + formatInfo.mComponentCount = ((red > 0) ? 1 : 0) + ((green > 0) ? 1 : 0) + ((blue > 0) ? 1 : 0) + ((alpha > 0) ? 1 : 0); + formatInfo.mFormat = format; + formatInfo.mType = type; + formatInfo.mComponentType = componentType; + formatInfo.mColorEncoding = (srgb ? GL_SRGB : GL_LINEAR); + formatInfo.mTextureSupportFunction = textureSupport; + formatInfo.mRenderSupportFunction = renderSupport; + formatInfo.mFilterSupportFunction = filterSupport; + return formatInfo; + } + + static InternalFormatInfo LUMAFormat(GLuint luminance, GLuint alpha, GLenum format, GLenum type, GLenum componentType, + SupportCheckFunction textureSupport, SupportCheckFunction renderSupport, + SupportCheckFunction filterSupport) + { + InternalFormatInfo formatInfo; + formatInfo.mLuminanceBits = luminance; + formatInfo.mAlphaBits = alpha; + formatInfo.mPixelBits = luminance + alpha; + formatInfo.mComponentCount = ((luminance > 0) ? 1 : 0) + ((alpha > 0) ? 1 : 0); + formatInfo.mFormat = format; + formatInfo.mType = type; + formatInfo.mComponentType = componentType; + formatInfo.mColorEncoding = GL_LINEAR; + formatInfo.mTextureSupportFunction = textureSupport; + formatInfo.mRenderSupportFunction = renderSupport; + formatInfo.mFilterSupportFunction = filterSupport; + return formatInfo; + } + + static InternalFormatInfo DepthStencilFormat(GLuint depthBits, GLuint stencilBits, GLuint unusedBits, GLenum format, + GLenum type, GLenum componentType, SupportCheckFunction textureSupport, + SupportCheckFunction renderSupport, SupportCheckFunction filterSupport) + { + InternalFormatInfo formatInfo; + formatInfo.mDepthBits = depthBits; + formatInfo.mStencilBits = stencilBits; + formatInfo.mPixelBits = depthBits + stencilBits + unusedBits; + formatInfo.mComponentCount = ((depthBits > 0) ? 1 : 0) + ((stencilBits > 0) ? 1 : 0); + formatInfo.mFormat = format; + formatInfo.mType = type; + formatInfo.mComponentType = componentType; + formatInfo.mColorEncoding = GL_LINEAR; + formatInfo.mTextureSupportFunction = textureSupport; + formatInfo.mRenderSupportFunction = renderSupport; + formatInfo.mFilterSupportFunction = filterSupport; + return formatInfo; + } + + static InternalFormatInfo CompressedFormat(GLuint compressedBlockWidth, GLuint compressedBlockHeight, GLuint compressedBlockSize, + GLuint componentCount, GLenum format, GLenum type, bool srgb, + SupportCheckFunction textureSupport, SupportCheckFunction renderSupport, + SupportCheckFunction filterSupport) + { + InternalFormatInfo formatInfo; + formatInfo.mCompressedBlockWidth = compressedBlockWidth; + formatInfo.mCompressedBlockHeight = compressedBlockHeight; + formatInfo.mPixelBits = compressedBlockSize; + formatInfo.mComponentCount = componentCount; + formatInfo.mFormat = format; + formatInfo.mType = type; + formatInfo.mComponentType = GL_UNSIGNED_NORMALIZED; + formatInfo.mColorEncoding = (srgb ? GL_SRGB : GL_LINEAR); + formatInfo.mIsCompressed = true; + formatInfo.mTextureSupportFunction = textureSupport; + formatInfo.mRenderSupportFunction = renderSupport; + formatInfo.mFilterSupportFunction = filterSupport; + return formatInfo; + } +}; + +typedef std::pair<GLenum, InternalFormatInfo> InternalFormatInfoPair; +typedef std::map<GLenum, InternalFormatInfo> InternalFormatInfoMap; + +static InternalFormatInfoMap BuildInternalFormatInfoMap() +{ + InternalFormatInfoMap map; + + // From ES 3.0.1 spec, table 3.12 + map.insert(InternalFormatInfoPair(GL_NONE, InternalFormatInfo())); + + // | Internal format | | R | G | B | A |S | Format | Type | Component type | SRGB | Texture supported | Renderable | Filterable | + map.insert(InternalFormatInfoPair(GL_R8, InternalFormatInfo::RGBAFormat( 8, 0, 0, 0, 0, GL_RED, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, false, RequireESVersionOrExtension<3, &Extensions::textureRG>, AlwaysSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_R8_SNORM, InternalFormatInfo::RGBAFormat( 8, 0, 0, 0, 0, GL_RED, GL_BYTE, GL_SIGNED_NORMALIZED, false, RequireESVersion<3>, NeverSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_RG8, InternalFormatInfo::RGBAFormat( 8, 8, 0, 0, 0, GL_RG, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, false, RequireESVersionOrExtension<3, &Extensions::textureRG>, AlwaysSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_RG8_SNORM, InternalFormatInfo::RGBAFormat( 8, 8, 0, 0, 0, GL_RG, GL_BYTE, GL_SIGNED_NORMALIZED, false, RequireESVersion<3>, NeverSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_RGB8, InternalFormatInfo::RGBAFormat( 8, 8, 8, 0, 0, GL_RGB, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, false, RequireESVersionOrExtension<3, &Extensions::rgb8rgba8>, AlwaysSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_RGB8_SNORM, InternalFormatInfo::RGBAFormat( 8, 8, 8, 0, 0, GL_RGB, GL_BYTE, GL_SIGNED_NORMALIZED, false, RequireESVersion<3>, NeverSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_RGB565, InternalFormatInfo::RGBAFormat( 5, 6, 5, 0, 0, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, GL_UNSIGNED_NORMALIZED, false, RequireESVersion<2>, AlwaysSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_RGBA4, InternalFormatInfo::RGBAFormat( 4, 4, 4, 4, 0, GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4, GL_UNSIGNED_NORMALIZED, false, RequireESVersion<2>, AlwaysSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_RGB5_A1, InternalFormatInfo::RGBAFormat( 5, 5, 5, 1, 0, GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1, GL_UNSIGNED_NORMALIZED, false, RequireESVersion<2>, AlwaysSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_RGBA8, InternalFormatInfo::RGBAFormat( 8, 8, 8, 8, 0, GL_RGBA, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, false, RequireESVersionOrExtension<3, &Extensions::rgb8rgba8>, AlwaysSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_RGBA8_SNORM, InternalFormatInfo::RGBAFormat( 8, 8, 8, 8, 0, GL_RGBA, GL_BYTE, GL_SIGNED_NORMALIZED, false, RequireESVersion<3>, NeverSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_RGB10_A2, InternalFormatInfo::RGBAFormat(10, 10, 10, 2, 0, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, GL_UNSIGNED_NORMALIZED, false, RequireESVersion<3>, AlwaysSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_RGB10_A2UI, InternalFormatInfo::RGBAFormat(10, 10, 10, 2, 0, GL_RGBA_INTEGER, GL_UNSIGNED_INT_2_10_10_10_REV, GL_UNSIGNED_INT, false, RequireESVersion<3>, NeverSupported, NeverSupported))); + map.insert(InternalFormatInfoPair(GL_SRGB8, InternalFormatInfo::RGBAFormat( 8, 8, 8, 0, 0, GL_RGB, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, true, RequireESVersionOrExtension<3, &Extensions::sRGB>, NeverSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_SRGB8_ALPHA8, InternalFormatInfo::RGBAFormat( 8, 8, 8, 8, 0, GL_RGBA, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, true, RequireESVersionOrExtension<3, &Extensions::sRGB>, AlwaysSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_R11F_G11F_B10F, InternalFormatInfo::RGBAFormat(11, 11, 10, 0, 0, GL_RGB, GL_UNSIGNED_INT_10F_11F_11F_REV, GL_FLOAT, false, RequireESVersion<3>, RequireExtension<&Extensions::colorBufferFloat>, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_RGB9_E5, InternalFormatInfo::RGBAFormat( 9, 9, 9, 0, 5, GL_RGB, GL_UNSIGNED_INT_5_9_9_9_REV, GL_FLOAT, false, RequireESVersion<3>, NeverSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_R8I, InternalFormatInfo::RGBAFormat( 8, 0, 0, 0, 0, GL_RED_INTEGER, GL_BYTE, GL_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); + map.insert(InternalFormatInfoPair(GL_R8UI, InternalFormatInfo::RGBAFormat( 8, 0, 0, 0, 0, GL_RED_INTEGER, GL_UNSIGNED_BYTE, GL_UNSIGNED_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); + map.insert(InternalFormatInfoPair(GL_R16I, InternalFormatInfo::RGBAFormat(16, 0, 0, 0, 0, GL_RED_INTEGER, GL_SHORT, GL_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); + map.insert(InternalFormatInfoPair(GL_R16UI, InternalFormatInfo::RGBAFormat(16, 0, 0, 0, 0, GL_RED_INTEGER, GL_UNSIGNED_SHORT, GL_UNSIGNED_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); + map.insert(InternalFormatInfoPair(GL_R32I, InternalFormatInfo::RGBAFormat(32, 0, 0, 0, 0, GL_RED_INTEGER, GL_INT, GL_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); + map.insert(InternalFormatInfoPair(GL_R32UI, InternalFormatInfo::RGBAFormat(32, 0, 0, 0, 0, GL_RED_INTEGER, GL_UNSIGNED_INT, GL_UNSIGNED_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); + map.insert(InternalFormatInfoPair(GL_RG8I, InternalFormatInfo::RGBAFormat( 8, 8, 0, 0, 0, GL_RG_INTEGER, GL_BYTE, GL_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); + map.insert(InternalFormatInfoPair(GL_RG8UI, InternalFormatInfo::RGBAFormat( 8, 8, 0, 0, 0, GL_RG_INTEGER, GL_UNSIGNED_BYTE, GL_UNSIGNED_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); + map.insert(InternalFormatInfoPair(GL_RG16I, InternalFormatInfo::RGBAFormat(16, 16, 0, 0, 0, GL_RG_INTEGER, GL_SHORT, GL_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); + map.insert(InternalFormatInfoPair(GL_RG16UI, InternalFormatInfo::RGBAFormat(16, 16, 0, 0, 0, GL_RG_INTEGER, GL_UNSIGNED_SHORT, GL_UNSIGNED_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); + map.insert(InternalFormatInfoPair(GL_RG32I, InternalFormatInfo::RGBAFormat(32, 32, 0, 0, 0, GL_RG_INTEGER, GL_INT, GL_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); + map.insert(InternalFormatInfoPair(GL_RG32UI, InternalFormatInfo::RGBAFormat(32, 32, 0, 0, 0, GL_RG_INTEGER, GL_UNSIGNED_INT, GL_UNSIGNED_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); + map.insert(InternalFormatInfoPair(GL_RGB8I, InternalFormatInfo::RGBAFormat( 8, 8, 8, 0, 0, GL_RGB_INTEGER, GL_BYTE, GL_INT, false, RequireESVersion<3>, NeverSupported, NeverSupported))); + map.insert(InternalFormatInfoPair(GL_RGB8UI, InternalFormatInfo::RGBAFormat( 8, 8, 8, 0, 0, GL_RGB_INTEGER, GL_UNSIGNED_BYTE, GL_UNSIGNED_INT, false, RequireESVersion<3>, NeverSupported, NeverSupported))); + map.insert(InternalFormatInfoPair(GL_RGB16I, InternalFormatInfo::RGBAFormat(16, 16, 16, 0, 0, GL_RGB_INTEGER, GL_SHORT, GL_INT, false, RequireESVersion<3>, NeverSupported, NeverSupported))); + map.insert(InternalFormatInfoPair(GL_RGB16UI, InternalFormatInfo::RGBAFormat(16, 16, 16, 0, 0, GL_RGB_INTEGER, GL_UNSIGNED_SHORT, GL_UNSIGNED_INT, false, RequireESVersion<3>, NeverSupported, NeverSupported))); + map.insert(InternalFormatInfoPair(GL_RGB32I, InternalFormatInfo::RGBAFormat(32, 32, 32, 0, 0, GL_RGB_INTEGER, GL_INT, GL_INT, false, RequireESVersion<3>, NeverSupported, NeverSupported))); + map.insert(InternalFormatInfoPair(GL_RGB32UI, InternalFormatInfo::RGBAFormat(32, 32, 32, 0, 0, GL_RGB_INTEGER, GL_UNSIGNED_INT, GL_UNSIGNED_INT, false, RequireESVersion<3>, NeverSupported, NeverSupported))); + map.insert(InternalFormatInfoPair(GL_RGBA8I, InternalFormatInfo::RGBAFormat( 8, 8, 8, 8, 0, GL_RGBA_INTEGER, GL_BYTE, GL_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); + map.insert(InternalFormatInfoPair(GL_RGBA8UI, InternalFormatInfo::RGBAFormat( 8, 8, 8, 8, 0, GL_RGBA_INTEGER, GL_UNSIGNED_BYTE, GL_UNSIGNED_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); + map.insert(InternalFormatInfoPair(GL_RGBA16I, InternalFormatInfo::RGBAFormat(16, 16, 16, 16, 0, GL_RGBA_INTEGER, GL_SHORT, GL_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); + map.insert(InternalFormatInfoPair(GL_RGBA16UI, InternalFormatInfo::RGBAFormat(16, 16, 16, 16, 0, GL_RGBA_INTEGER, GL_UNSIGNED_SHORT, GL_UNSIGNED_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); + map.insert(InternalFormatInfoPair(GL_RGBA32I, InternalFormatInfo::RGBAFormat(32, 32, 32, 32, 0, GL_RGBA_INTEGER, GL_INT, GL_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); + map.insert(InternalFormatInfoPair(GL_RGBA32UI, InternalFormatInfo::RGBAFormat(32, 32, 32, 32, 0, GL_RGBA_INTEGER, GL_UNSIGNED_INT, GL_UNSIGNED_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); + + map.insert(InternalFormatInfoPair(GL_BGRA8_EXT, InternalFormatInfo::RGBAFormat( 8, 8, 8, 8, 0, GL_BGRA_EXT, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, false, RequireExtension<&Extensions::textureFormatBGRA8888>, AlwaysSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_BGRA4_ANGLEX, InternalFormatInfo::RGBAFormat( 4, 4, 4, 4, 0, GL_BGRA_EXT, GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT, GL_UNSIGNED_NORMALIZED, false, RequireExtension<&Extensions::textureFormatBGRA8888>, AlwaysSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_BGR5_A1_ANGLEX, InternalFormatInfo::RGBAFormat( 5, 5, 5, 1, 0, GL_BGRA_EXT, GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT, GL_UNSIGNED_NORMALIZED, false, RequireExtension<&Extensions::textureFormatBGRA8888>, AlwaysSupported, 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, InternalFormatInfo::RGBAFormat(16, 0, 0, 0, 0, GL_RED, GL_HALF_FLOAT, GL_FLOAT, false, RequireESVersionOrExtensions<3, &Extensions::textureHalfFloat, &Extensions::textureRG>, AlwaysSupported, RequireExtension<&Extensions::textureHalfFloatLinear>))); + map.insert(InternalFormatInfoPair(GL_RG16F, InternalFormatInfo::RGBAFormat(16, 16, 0, 0, 0, GL_RG, GL_HALF_FLOAT, GL_FLOAT, false, RequireESVersionOrExtensions<3, &Extensions::textureHalfFloat, &Extensions::textureRG>, AlwaysSupported, RequireExtension<&Extensions::textureHalfFloatLinear>))); + map.insert(InternalFormatInfoPair(GL_RGB16F, InternalFormatInfo::RGBAFormat(16, 16, 16, 0, 0, GL_RGB, GL_HALF_FLOAT, GL_FLOAT, false, RequireESVersionOrExtension<3, &Extensions::textureHalfFloat>, AlwaysSupported, RequireExtension<&Extensions::textureHalfFloatLinear>))); + map.insert(InternalFormatInfoPair(GL_RGBA16F, InternalFormatInfo::RGBAFormat(16, 16, 16, 16, 0, GL_RGBA, GL_HALF_FLOAT, GL_FLOAT, false, RequireESVersionOrExtension<3, &Extensions::textureHalfFloat>, AlwaysSupported, RequireExtension<&Extensions::textureHalfFloatLinear>))); + map.insert(InternalFormatInfoPair(GL_R32F, InternalFormatInfo::RGBAFormat(32, 0, 0, 0, 0, GL_RED, GL_FLOAT, GL_FLOAT, false, RequireESVersionOrExtensions<3, &Extensions::textureFloat, &Extensions::textureRG>, AlwaysSupported, RequireExtension<&Extensions::textureFloatLinear> ))); + map.insert(InternalFormatInfoPair(GL_RG32F, InternalFormatInfo::RGBAFormat(32, 32, 0, 0, 0, GL_RG, GL_FLOAT, GL_FLOAT, false, RequireESVersionOrExtensions<3, &Extensions::textureFloat, &Extensions::textureRG>, AlwaysSupported, RequireExtension<&Extensions::textureFloatLinear> ))); + map.insert(InternalFormatInfoPair(GL_RGB32F, InternalFormatInfo::RGBAFormat(32, 32, 32, 0, 0, GL_RGB, GL_FLOAT, GL_FLOAT, false, RequireESVersionOrExtension<3, &Extensions::textureFloat>, AlwaysSupported, RequireExtension<&Extensions::textureFloatLinear> ))); + map.insert(InternalFormatInfoPair(GL_RGBA32F, InternalFormatInfo::RGBAFormat(32, 32, 32, 32, 0, GL_RGBA, GL_FLOAT, GL_FLOAT, false, RequireESVersionOrExtension<3, &Extensions::textureFloat>, AlwaysSupported, RequireExtension<&Extensions::textureFloatLinear> ))); + + // Depth stencil formats + // | Internal format | | D |S | X | Format | Type | Component type | Supported | + map.insert(InternalFormatInfoPair(GL_DEPTH_COMPONENT16, InternalFormatInfo::DepthStencilFormat(16, 0, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_SHORT, GL_UNSIGNED_NORMALIZED, RequireESVersion<2>, AlwaysSupported, RequireESVersionOrExtension<3, &Extensions::depthTextures>))); + map.insert(InternalFormatInfoPair(GL_DEPTH_COMPONENT24, InternalFormatInfo::DepthStencilFormat(24, 0, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, GL_UNSIGNED_NORMALIZED, RequireESVersion<3>, AlwaysSupported, RequireESVersionOrExtension<3, &Extensions::depthTextures>))); + map.insert(InternalFormatInfoPair(GL_DEPTH_COMPONENT32F, InternalFormatInfo::DepthStencilFormat(32, 0, 0, GL_DEPTH_COMPONENT, GL_FLOAT, GL_FLOAT, RequireESVersion<3>, AlwaysSupported, RequireESVersionOrExtension<3, &Extensions::depthTextures>))); + map.insert(InternalFormatInfoPair(GL_DEPTH_COMPONENT32_OES, InternalFormatInfo::DepthStencilFormat(32, 0, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, GL_UNSIGNED_NORMALIZED, RequireExtension<&Extensions::depthTextures>, AlwaysSupported, AlwaysSupported ))); + map.insert(InternalFormatInfoPair(GL_DEPTH24_STENCIL8, InternalFormatInfo::DepthStencilFormat(24, 8, 0, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, GL_UNSIGNED_NORMALIZED, RequireESVersionOrExtension<2, &Extensions::depthTextures>, AlwaysSupported, AlwaysSupported ))); + map.insert(InternalFormatInfoPair(GL_DEPTH32F_STENCIL8, InternalFormatInfo::DepthStencilFormat(32, 8, 24, GL_DEPTH_STENCIL, GL_FLOAT_32_UNSIGNED_INT_24_8_REV, GL_FLOAT, RequireESVersion<3>, AlwaysSupported, AlwaysSupported ))); + map.insert(InternalFormatInfoPair(GL_STENCIL_INDEX8, InternalFormatInfo::DepthStencilFormat( 0, 8, 0, GL_DEPTH_STENCIL, GL_UNSIGNED_BYTE, GL_UNSIGNED_INT, RequireESVersion<2>, AlwaysSupported, NeverSupported ))); + + // Luminance alpha formats + // | Internal format | | L | A | Format | Type | Component type | Supported | Renderable | Filterable | + map.insert(InternalFormatInfoPair(GL_ALPHA8_EXT, InternalFormatInfo::LUMAFormat( 0, 8, GL_ALPHA, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, RequireExtension<&Extensions::textureStorage>, NeverSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_LUMINANCE8_EXT, InternalFormatInfo::LUMAFormat( 8, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, RequireExtension<&Extensions::textureStorage>, NeverSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_ALPHA32F_EXT, InternalFormatInfo::LUMAFormat( 0, 32, GL_ALPHA, GL_FLOAT, GL_FLOAT, RequireExtensions<&Extensions::textureStorage, &Extensions::textureFloat>, NeverSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_LUMINANCE32F_EXT, InternalFormatInfo::LUMAFormat(32, 0, GL_LUMINANCE, GL_FLOAT, GL_FLOAT, RequireExtensions<&Extensions::textureStorage, &Extensions::textureFloat>, NeverSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_ALPHA16F_EXT, InternalFormatInfo::LUMAFormat( 0, 16, GL_ALPHA, GL_HALF_FLOAT, GL_FLOAT, RequireExtensions<&Extensions::textureStorage, &Extensions::textureHalfFloat>, NeverSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_LUMINANCE16F_EXT, InternalFormatInfo::LUMAFormat(16, 0, GL_LUMINANCE, GL_HALF_FLOAT, GL_FLOAT, RequireExtensions<&Extensions::textureStorage, &Extensions::textureHalfFloat>, NeverSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_LUMINANCE8_ALPHA8_EXT, InternalFormatInfo::LUMAFormat( 8, 8, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, RequireExtension<&Extensions::textureStorage>, NeverSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_LUMINANCE_ALPHA32F_EXT, InternalFormatInfo::LUMAFormat(32, 32, GL_LUMINANCE_ALPHA, GL_FLOAT, GL_FLOAT, RequireExtensions<&Extensions::textureStorage, &Extensions::textureFloat>, NeverSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_LUMINANCE_ALPHA16F_EXT, InternalFormatInfo::LUMAFormat(16, 16, GL_LUMINANCE_ALPHA, GL_HALF_FLOAT, GL_FLOAT, RequireExtensions<&Extensions::textureStorage, &Extensions::textureHalfFloat>, NeverSupported, AlwaysSupported))); + + // Unsized formats + // | Internal format | | Format | Supported | Renderable | Filterable | + map.insert(InternalFormatInfoPair(GL_ALPHA, InternalFormatInfo::UnsizedFormat(GL_ALPHA, RequireESVersion<2>, NeverSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_LUMINANCE, InternalFormatInfo::UnsizedFormat(GL_LUMINANCE, RequireESVersion<2>, NeverSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_LUMINANCE_ALPHA, InternalFormatInfo::UnsizedFormat(GL_LUMINANCE_ALPHA, RequireESVersion<2>, NeverSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_RED, InternalFormatInfo::UnsizedFormat(GL_RED, RequireESVersionOrExtension<3, &Extensions::textureRG>, NeverSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_RG, InternalFormatInfo::UnsizedFormat(GL_RG, RequireESVersionOrExtension<3, &Extensions::textureRG>, NeverSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_RGB, InternalFormatInfo::UnsizedFormat(GL_RGB, RequireESVersion<2>, AlwaysSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_RGBA, InternalFormatInfo::UnsizedFormat(GL_RGBA, RequireESVersion<2>, AlwaysSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_RED_INTEGER, InternalFormatInfo::UnsizedFormat(GL_RED_INTEGER, RequireESVersion<3>, NeverSupported, NeverSupported ))); + map.insert(InternalFormatInfoPair(GL_RG_INTEGER, InternalFormatInfo::UnsizedFormat(GL_RG_INTEGER, RequireESVersion<3>, NeverSupported, NeverSupported ))); + map.insert(InternalFormatInfoPair(GL_RGB_INTEGER, InternalFormatInfo::UnsizedFormat(GL_RGB_INTEGER, RequireESVersion<3>, NeverSupported, NeverSupported ))); + map.insert(InternalFormatInfoPair(GL_RGBA_INTEGER, InternalFormatInfo::UnsizedFormat(GL_RGBA_INTEGER, RequireESVersion<3>, NeverSupported, NeverSupported ))); + map.insert(InternalFormatInfoPair(GL_BGRA_EXT, InternalFormatInfo::UnsizedFormat(GL_BGRA_EXT, RequireExtension<&Extensions::textureFormatBGRA8888>, AlwaysSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_DEPTH_COMPONENT, InternalFormatInfo::UnsizedFormat(GL_DEPTH_COMPONENT, RequireESVersion<2>, AlwaysSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_DEPTH_STENCIL, InternalFormatInfo::UnsizedFormat(GL_DEPTH_STENCIL, RequireESVersionOrExtension<3, &Extensions::packedDepthStencil>, AlwaysSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_SRGB_EXT, InternalFormatInfo::UnsizedFormat(GL_RGB, RequireESVersionOrExtension<3, &Extensions::sRGB>, NeverSupported, AlwaysSupported))); + map.insert(InternalFormatInfoPair(GL_SRGB_ALPHA_EXT, InternalFormatInfo::UnsizedFormat(GL_RGBA, RequireESVersionOrExtension<3, &Extensions::sRGB>, AlwaysSupported, 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, InternalFormatInfo::CompressedFormat(4, 4, 64, 1, GL_COMPRESSED_R11_EAC, GL_UNSIGNED_BYTE, false, UnimplementedSupport, UnimplementedSupport, UnimplementedSupport))); + map.insert(InternalFormatInfoPair(GL_COMPRESSED_SIGNED_R11_EAC, InternalFormatInfo::CompressedFormat(4, 4, 64, 1, GL_COMPRESSED_SIGNED_R11_EAC, GL_UNSIGNED_BYTE, false, UnimplementedSupport, UnimplementedSupport, UnimplementedSupport))); + map.insert(InternalFormatInfoPair(GL_COMPRESSED_RG11_EAC, InternalFormatInfo::CompressedFormat(4, 4, 128, 2, GL_COMPRESSED_RG11_EAC, GL_UNSIGNED_BYTE, false, UnimplementedSupport, UnimplementedSupport, UnimplementedSupport))); + map.insert(InternalFormatInfoPair(GL_COMPRESSED_SIGNED_RG11_EAC, InternalFormatInfo::CompressedFormat(4, 4, 128, 2, GL_COMPRESSED_SIGNED_RG11_EAC, GL_UNSIGNED_BYTE, false, UnimplementedSupport, UnimplementedSupport, UnimplementedSupport))); + map.insert(InternalFormatInfoPair(GL_COMPRESSED_RGB8_ETC2, InternalFormatInfo::CompressedFormat(4, 4, 64, 3, GL_COMPRESSED_RGB8_ETC2, GL_UNSIGNED_BYTE, false, UnimplementedSupport, UnimplementedSupport, UnimplementedSupport))); + map.insert(InternalFormatInfoPair(GL_COMPRESSED_SRGB8_ETC2, InternalFormatInfo::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, InternalFormatInfo::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, InternalFormatInfo::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, InternalFormatInfo::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, InternalFormatInfo::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, InternalFormatInfo::CompressedFormat(4, 4, 64, 3, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, GL_UNSIGNED_BYTE, false, RequireExtension<&Extensions::textureCompressionDXT1>, NeverSupported, AlwaysSupported ))); + map.insert(InternalFormatInfoPair(GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, InternalFormatInfo::CompressedFormat(4, 4, 64, 4, GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, GL_UNSIGNED_BYTE, false, RequireExtension<&Extensions::textureCompressionDXT1>, NeverSupported, AlwaysSupported ))); + + // From GL_ANGLE_texture_compression_dxt3 + map.insert(InternalFormatInfoPair(GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE, InternalFormatInfo::CompressedFormat(4, 4, 128, 4, GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE, GL_UNSIGNED_BYTE, false, RequireExtension<&Extensions::textureCompressionDXT5>, NeverSupported, AlwaysSupported ))); + + // From GL_ANGLE_texture_compression_dxt5 + map.insert(InternalFormatInfoPair(GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE, InternalFormatInfo::CompressedFormat(4, 4, 128, 4, GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE, GL_UNSIGNED_BYTE, false, RequireExtension<&Extensions::textureCompressionDXT5>, NeverSupported, AlwaysSupported ))); + + return map; +} + +static const InternalFormatInfoMap &GetInternalFormatMap() +{ + static const InternalFormatInfoMap formatMap = BuildInternalFormatInfoMap(); + return formatMap; +} + +static bool GetInternalFormatInfo(GLenum internalFormat, InternalFormatInfo *outFormatInfo) +{ + const InternalFormatInfoMap &map = GetInternalFormatMap(); + InternalFormatInfoMap::const_iterator iter = map.find(internalFormat); + if (iter != map.end()) + { + if (outFormatInfo) + { + *outFormatInfo = iter->second; + } + return true; + } + else + { + return false; + } +} + +static FormatSet BuildAllSizedInternalFormatSet() +{ + FormatSet result; + + const InternalFormatInfoMap &formats = GetInternalFormatMap(); + for (InternalFormatInfoMap::const_iterator i = formats.begin(); i != formats.end(); i++) + { + if (i->second.mPixelBits > 0) + { + result.insert(i->first); + } + } + + return result; +} + +typedef std::set<GLenum> TypeSet; + +struct EffectiveInternalFormatInfo +{ + GLenum mEffectiveFormat; + GLenum mDestFormat; + GLuint mMinRedBits; + GLuint mMaxRedBits; + GLuint mMinGreenBits; + GLuint mMaxGreenBits; + GLuint mMinBlueBits; + GLuint mMaxBlueBits; + GLuint mMinAlphaBits; + GLuint mMaxAlphaBits; + + EffectiveInternalFormatInfo(GLenum effectiveFormat, GLenum destFormat, GLuint minRedBits, GLuint maxRedBits, + GLuint minGreenBits, GLuint maxGreenBits, GLuint minBlueBits, GLuint maxBlueBits, + GLuint minAlphaBits, GLuint maxAlphaBits) + : mEffectiveFormat(effectiveFormat), mDestFormat(destFormat), mMinRedBits(minRedBits), + mMaxRedBits(maxRedBits), mMinGreenBits(minGreenBits), mMaxGreenBits(maxGreenBits), + mMinBlueBits(minBlueBits), mMaxBlueBits(maxBlueBits), mMinAlphaBits(minAlphaBits), + mMaxAlphaBits(maxAlphaBits) {}; +}; + +typedef std::vector<EffectiveInternalFormatInfo> EffectiveInternalFormatList; + +static EffectiveInternalFormatList BuildSizedEffectiveInternalFormatList() +{ + EffectiveInternalFormatList list; + + // OpenGL ES 3.0.3 Specification, Table 3.17, pg 141: Effective internal format coresponding to destination internal format and + // linear source buffer component sizes. + // | Source channel min/max sizes | + // Effective Internal Format | N/A | R | G | B | A | + list.push_back(EffectiveInternalFormatInfo(GL_ALPHA8_EXT, GL_NONE, 0, 0, 0, 0, 0, 0, 1, 8)); + list.push_back(EffectiveInternalFormatInfo(GL_R8, GL_NONE, 1, 8, 0, 0, 0, 0, 0, 0)); + list.push_back(EffectiveInternalFormatInfo(GL_RG8, GL_NONE, 1, 8, 1, 8, 0, 0, 0, 0)); + list.push_back(EffectiveInternalFormatInfo(GL_RGB565, GL_NONE, 1, 5, 1, 6, 1, 5, 0, 0)); + list.push_back(EffectiveInternalFormatInfo(GL_RGB8, GL_NONE, 6, 8, 7, 8, 6, 8, 0, 0)); + list.push_back(EffectiveInternalFormatInfo(GL_RGBA4, GL_NONE, 1, 4, 1, 4, 1, 4, 1, 4)); + list.push_back(EffectiveInternalFormatInfo(GL_RGB5_A1, GL_NONE, 5, 5, 5, 5, 5, 5, 1, 1)); + list.push_back(EffectiveInternalFormatInfo(GL_RGBA8, GL_NONE, 5, 8, 5, 8, 5, 8, 2, 8)); + list.push_back(EffectiveInternalFormatInfo(GL_RGB10_A2, GL_NONE, 9, 10, 9, 10, 9, 10, 2, 2)); + + return list; +} + + +static EffectiveInternalFormatList BuildUnsizedEffectiveInternalFormatList() +{ + EffectiveInternalFormatList list; + + // OpenGL ES 3.0.3 Specification, Table 3.17, pg 141: Effective internal format coresponding to destination internal format and + // linear source buffer component sizes. + // | Source channel min/max sizes | + // Effective Internal Format | Dest Format | R | G | B | A | + list.push_back(EffectiveInternalFormatInfo(GL_ALPHA8_EXT, GL_ALPHA, 0, UINT_MAX, 0, UINT_MAX, 0, UINT_MAX, 1, 8)); + list.push_back(EffectiveInternalFormatInfo(GL_LUMINANCE8_EXT, GL_LUMINANCE, 1, 8, 0, UINT_MAX, 0, UINT_MAX, 0, UINT_MAX)); + list.push_back(EffectiveInternalFormatInfo(GL_LUMINANCE8_ALPHA8_EXT, GL_LUMINANCE_ALPHA, 1, 8, 0, UINT_MAX, 0, UINT_MAX, 1, 8)); + list.push_back(EffectiveInternalFormatInfo(GL_RGB565, GL_RGB, 1, 5, 1, 6, 1, 5, 0, UINT_MAX)); + list.push_back(EffectiveInternalFormatInfo(GL_RGB8, GL_RGB, 6, 8, 7, 8, 6, 8, 0, UINT_MAX)); + list.push_back(EffectiveInternalFormatInfo(GL_RGBA4, GL_RGBA, 1, 4, 1, 4, 1, 4, 1, 4)); + list.push_back(EffectiveInternalFormatInfo(GL_RGB5_A1, GL_RGBA, 5, 5, 5, 5, 5, 5, 1, 1)); + list.push_back(EffectiveInternalFormatInfo(GL_RGBA8, GL_RGBA, 5, 8, 5, 8, 5, 8, 5, 8)); + + return list; +} + +static bool GetEffectiveInternalFormat(const InternalFormatInfo &srcFormat, const InternalFormatInfo &destFormat, + GLenum *outEffectiveFormat) +{ + const EffectiveInternalFormatList *list = NULL; + GLenum targetFormat = GL_NONE; + + if (gl::IsSizedInternalFormat(destFormat.mFormat)) + { + static const EffectiveInternalFormatList sizedList = BuildSizedEffectiveInternalFormatList(); + list = &sizedList; + } + else + { + static const EffectiveInternalFormatList unsizedList = BuildUnsizedEffectiveInternalFormatList(); + list = &unsizedList; + targetFormat = destFormat.mFormat; + } + + for (size_t curFormat = 0; curFormat < list->size(); ++curFormat) + { + const EffectiveInternalFormatInfo& formatInfo = list->at(curFormat); + if ((formatInfo.mDestFormat == targetFormat) && + (formatInfo.mMinRedBits <= srcFormat.mRedBits && formatInfo.mMaxRedBits >= srcFormat.mRedBits) && + (formatInfo.mMinGreenBits <= srcFormat.mGreenBits && formatInfo.mMaxGreenBits >= srcFormat.mGreenBits) && + (formatInfo.mMinBlueBits <= srcFormat.mBlueBits && formatInfo.mMaxBlueBits >= srcFormat.mBlueBits) && + (formatInfo.mMinAlphaBits <= srcFormat.mAlphaBits && formatInfo.mMaxAlphaBits >= srcFormat.mAlphaBits)) + { + *outEffectiveFormat = formatInfo.mEffectiveFormat; + return true; + } + } + + return false; +} + +struct CopyConversion +{ + GLenum mTextureFormat; + GLenum mFramebufferFormat; + + CopyConversion(GLenum textureFormat, GLenum framebufferFormat) + : mTextureFormat(textureFormat), mFramebufferFormat(framebufferFormat) { } + + bool operator<(const CopyConversion& other) const + { + return memcmp(this, &other, sizeof(CopyConversion)) < 0; + } +}; + +typedef std::set<CopyConversion> CopyConversionSet; + +static CopyConversionSet BuildValidES3CopyTexImageCombinations() +{ + CopyConversionSet set; + + // From ES 3.0.1 spec, table 3.15 + set.insert(CopyConversion(GL_ALPHA, GL_RGBA)); + set.insert(CopyConversion(GL_LUMINANCE, GL_RED)); + set.insert(CopyConversion(GL_LUMINANCE, GL_RG)); + set.insert(CopyConversion(GL_LUMINANCE, GL_RGB)); + set.insert(CopyConversion(GL_LUMINANCE, GL_RGBA)); + set.insert(CopyConversion(GL_LUMINANCE_ALPHA, GL_RGBA)); + set.insert(CopyConversion(GL_RED, GL_RED)); + set.insert(CopyConversion(GL_RED, GL_RG)); + set.insert(CopyConversion(GL_RED, GL_RGB)); + set.insert(CopyConversion(GL_RED, GL_RGBA)); + set.insert(CopyConversion(GL_RG, GL_RG)); + set.insert(CopyConversion(GL_RG, GL_RGB)); + set.insert(CopyConversion(GL_RG, GL_RGBA)); + set.insert(CopyConversion(GL_RGB, GL_RGB)); + set.insert(CopyConversion(GL_RGB, GL_RGBA)); + set.insert(CopyConversion(GL_RGBA, GL_RGBA)); + + // Necessary for ANGLE back-buffers + set.insert(CopyConversion(GL_ALPHA, GL_BGRA_EXT)); + set.insert(CopyConversion(GL_LUMINANCE, GL_BGRA_EXT)); + set.insert(CopyConversion(GL_LUMINANCE_ALPHA, GL_BGRA_EXT)); + set.insert(CopyConversion(GL_RED, GL_BGRA_EXT)); + set.insert(CopyConversion(GL_RG, GL_BGRA_EXT)); + set.insert(CopyConversion(GL_RGB, GL_BGRA_EXT)); + set.insert(CopyConversion(GL_RGBA, GL_BGRA_EXT)); + + set.insert(CopyConversion(GL_RED_INTEGER, GL_RED_INTEGER)); + set.insert(CopyConversion(GL_RED_INTEGER, GL_RG_INTEGER)); + set.insert(CopyConversion(GL_RED_INTEGER, GL_RGB_INTEGER)); + set.insert(CopyConversion(GL_RED_INTEGER, GL_RGBA_INTEGER)); + set.insert(CopyConversion(GL_RG_INTEGER, GL_RG_INTEGER)); + set.insert(CopyConversion(GL_RG_INTEGER, GL_RGB_INTEGER)); + set.insert(CopyConversion(GL_RG_INTEGER, GL_RGBA_INTEGER)); + set.insert(CopyConversion(GL_RGB_INTEGER, GL_RGB_INTEGER)); + set.insert(CopyConversion(GL_RGB_INTEGER, GL_RGBA_INTEGER)); + set.insert(CopyConversion(GL_RGBA_INTEGER, GL_RGBA_INTEGER)); + + return set; +} + +bool IsValidInternalFormat(GLenum internalFormat, const Extensions &extensions, GLuint clientVersion) +{ + InternalFormatInfo internalFormatInfo; + if (GetInternalFormatInfo(internalFormat, &internalFormatInfo)) + { + ASSERT(internalFormatInfo.mTextureSupportFunction != NULL); + return internalFormatInfo.mTextureSupportFunction(clientVersion, extensions); + } + else + { + return false; + } +} + +bool IsValidFormat(GLenum format, const Extensions &extensions, GLuint clientVersion) +{ + const InternalFormatInfoMap &internalFormats = GetInternalFormatMap(); + for (InternalFormatInfoMap::const_iterator i = internalFormats.begin(); i != internalFormats.end(); i++) + { + if (i->second.mFormat == format && i->second.mTextureSupportFunction(clientVersion, extensions)) + { + return true; + } + } + + return false; +} + +bool IsValidType(GLenum type, const Extensions &extensions, GLuint clientVersion) +{ + const InternalFormatInfoMap &internalFormats = GetInternalFormatMap(); + for (InternalFormatInfoMap::const_iterator i = internalFormats.begin(); i != internalFormats.end(); i++) + { + if (i->second.mType == type && i->second.mTextureSupportFunction(clientVersion, extensions)) + { + return true; + } + } + + return false; +} + +bool IsValidFormatCombination(GLenum internalFormat, GLenum format, GLenum type, const Extensions &extensions, GLuint clientVersion) +{ + InternalFormatInfo internalFormatInfo; + if (GetInternalFormatInfo(internalFormat, &internalFormatInfo)) + { + if (!internalFormatInfo.mTextureSupportFunction(clientVersion, extensions)) + { + return false; + } + } + else + { + UNREACHABLE(); + return false; + } + + if (clientVersion == 2) + { + static const FormatMap &formats = GetFormatMap(); + FormatMap::const_iterator iter = formats.find(FormatTypePair(format, type)); + return (iter != formats.end()) && ((internalFormat == (GLint)type) || (internalFormat == iter->second.mInternalFormat)); + } + else if (clientVersion == 3) + { + static const ES3FormatSet &formats = GetES3FormatSet(); + return formats.find(FormatInfo(internalFormat, format, type)) != formats.end(); + } + else + { + UNREACHABLE(); + return false; + } +} + +bool IsValidCopyTexImageCombination(GLenum textureInternalFormat, GLenum frameBufferInternalFormat, GLuint readBufferHandle, GLuint clientVersion) +{ + InternalFormatInfo textureInternalFormatInfo; + InternalFormatInfo framebufferInternalFormatInfo; + if (GetInternalFormatInfo(textureInternalFormat, &textureInternalFormatInfo) && + GetInternalFormatInfo(frameBufferInternalFormat, &framebufferInternalFormatInfo)) + { + if (clientVersion == 2) + { + UNIMPLEMENTED(); + return false; + } + else if (clientVersion == 3) + { + static const CopyConversionSet conversionSet = BuildValidES3CopyTexImageCombinations(); + const CopyConversion conversion = CopyConversion(textureInternalFormatInfo.mFormat, + framebufferInternalFormatInfo.mFormat); + if (conversionSet.find(conversion) != conversionSet.end()) + { + // Section 3.8.5 of the GLES 3.0.3 spec states that source and destination formats + // must both be signed, unsigned, or fixed point and both source and destinations + // must be either both SRGB or both not SRGB. EXT_color_buffer_float adds allowed + // conversion between fixed and floating point. + + if ((textureInternalFormatInfo.mColorEncoding == GL_SRGB) != (framebufferInternalFormatInfo.mColorEncoding == GL_SRGB)) + { + return false; + } + + if (((textureInternalFormatInfo.mComponentType == GL_INT) != (framebufferInternalFormatInfo.mComponentType == GL_INT)) || + ((textureInternalFormatInfo.mComponentType == GL_UNSIGNED_INT) != (framebufferInternalFormatInfo.mComponentType == GL_UNSIGNED_INT))) + { + return false; + } + + if (gl::IsFloatOrFixedComponentType(textureInternalFormatInfo.mComponentType) && + !gl::IsFloatOrFixedComponentType(framebufferInternalFormatInfo.mComponentType)) + { + return false; + } + + // GLES specification 3.0.3, sec 3.8.5, pg 139-140: + // The effective internal format of the source buffer is determined with the following rules applied in order: + // * If the source buffer is a texture or renderbuffer that was created with a sized internal format then the + // effective internal format is the source buffer's sized internal format. + // * If the source buffer is a texture that was created with an unsized base internal format, then the + // effective internal format is the source image array's effective internal format, as specified by table + // 3.12, which is determined from the <format> and <type> that were used when the source image array was + // specified by TexImage*. + // * Otherwise the effective internal format is determined by the row in table 3.17 or 3.18 where + // Destination Internal Format matches internalformat and where the [source channel sizes] are consistent + // with the values of the source buffer's [channel sizes]. Table 3.17 is used if the + // FRAMEBUFFER_ATTACHMENT_ENCODING is LINEAR and table 3.18 is used if the FRAMEBUFFER_ATTACHMENT_ENCODING + // is SRGB. + InternalFormatInfo sourceEffectiveFormat; + if (readBufferHandle != 0) + { + // Not the default framebuffer, therefore the read buffer must be a user-created texture or renderbuffer + if (gl::IsSizedInternalFormat(framebufferInternalFormatInfo.mFormat)) + { + sourceEffectiveFormat = framebufferInternalFormatInfo; + } + else + { + // Renderbuffers cannot be created with an unsized internal format, so this must be an unsized-format + // texture. We can use the same table we use when creating textures to get its effective sized format. + GLenum effectiveFormat = gl::GetSizedInternalFormat(framebufferInternalFormatInfo.mFormat, + framebufferInternalFormatInfo.mType); + gl::GetInternalFormatInfo(effectiveFormat, &sourceEffectiveFormat); + } + } + else + { + // The effective internal format must be derived from the source framebuffer's channel sizes. + // This is done in GetEffectiveInternalFormat for linear buffers (table 3.17) + if (framebufferInternalFormatInfo.mColorEncoding == GL_LINEAR) + { + GLenum effectiveFormat; + if (GetEffectiveInternalFormat(framebufferInternalFormatInfo, textureInternalFormatInfo, &effectiveFormat)) + { + gl::GetInternalFormatInfo(effectiveFormat, &sourceEffectiveFormat); + } + else + { + return false; + } + } + else if (framebufferInternalFormatInfo.mColorEncoding == GL_SRGB) + { + // SRGB buffers can only be copied to sized format destinations according to table 3.18 + if (gl::IsSizedInternalFormat(textureInternalFormat) && + (framebufferInternalFormatInfo.mRedBits >= 1 && framebufferInternalFormatInfo.mRedBits <= 8) && + (framebufferInternalFormatInfo.mGreenBits >= 1 && framebufferInternalFormatInfo.mGreenBits <= 8) && + (framebufferInternalFormatInfo.mBlueBits >= 1 && framebufferInternalFormatInfo.mBlueBits <= 8) && + (framebufferInternalFormatInfo.mAlphaBits >= 1 && framebufferInternalFormatInfo.mAlphaBits <= 8)) + { + gl::GetInternalFormatInfo(GL_SRGB8_ALPHA8, &sourceEffectiveFormat); + } + else + { + return false; + } + } + else + { + UNREACHABLE(); + } + } + + if (gl::IsSizedInternalFormat(textureInternalFormatInfo.mFormat)) + { + // Section 3.8.5 of the GLES 3.0.3 spec, pg 139, requires that, if the destination format is sized, + // component sizes of the source and destination formats must exactly match + if (textureInternalFormatInfo.mRedBits != sourceEffectiveFormat.mRedBits || + textureInternalFormatInfo.mGreenBits != sourceEffectiveFormat.mGreenBits || + textureInternalFormatInfo.mBlueBits != sourceEffectiveFormat.mBlueBits || + textureInternalFormatInfo.mAlphaBits != sourceEffectiveFormat.mAlphaBits) + { + return false; + } + } + + + return true; // A conversion function exists, and no rule in the specification has precluded conversion + // between these formats. + } + + return false; + } + else + { + UNREACHABLE(); + return false; + } + } + else + { + UNREACHABLE(); + return false; + } +} + +bool IsRenderingSupported(GLenum internalFormat, const Extensions &extensions, GLuint clientVersion) +{ + InternalFormatInfo internalFormatInfo; + if (GetInternalFormatInfo(internalFormat, &internalFormatInfo)) + { + ASSERT(internalFormatInfo.mTextureSupportFunction != NULL); + ASSERT(internalFormatInfo.mRenderSupportFunction != NULL); + return internalFormatInfo.mTextureSupportFunction(clientVersion, extensions) && + internalFormatInfo.mRenderSupportFunction(clientVersion, extensions); + } + else + { + return false; + } +} + +bool IsFilteringSupported(GLenum internalFormat, const Extensions &extensions, GLuint clientVersion) +{ + InternalFormatInfo internalFormatInfo; + if (GetInternalFormatInfo(internalFormat, &internalFormatInfo)) + { + ASSERT(internalFormatInfo.mTextureSupportFunction != NULL); + ASSERT(internalFormatInfo.mFilterSupportFunction != NULL); + return internalFormatInfo.mTextureSupportFunction(clientVersion, extensions) && + internalFormatInfo.mFilterSupportFunction(clientVersion, extensions); + } + else + { + return false; + } +} + +bool IsSizedInternalFormat(GLenum internalFormat) +{ + InternalFormatInfo internalFormatInfo; + if (GetInternalFormatInfo(internalFormat, &internalFormatInfo)) + { + return internalFormatInfo.mPixelBits > 0; + } + else + { + UNREACHABLE(); + return false; + } +} + +GLenum GetSizedInternalFormat(GLenum format, GLenum type) +{ + const FormatMap &formats = GetFormatMap(); + FormatMap::const_iterator iter = formats.find(FormatTypePair(format, type)); + return (iter != formats.end()) ? iter->second.mInternalFormat : GL_NONE; +} + +GLuint GetPixelBytes(GLenum internalFormat) +{ + InternalFormatInfo internalFormatInfo; + if (GetInternalFormatInfo(internalFormat, &internalFormatInfo)) + { + return internalFormatInfo.mPixelBits / 8; + } + else + { + UNREACHABLE(); + return 0; + } +} + +GLuint GetAlphaBits(GLenum internalFormat) +{ + InternalFormatInfo internalFormatInfo; + if (GetInternalFormatInfo(internalFormat, &internalFormatInfo)) + { + return internalFormatInfo.mAlphaBits; + } + else + { + UNREACHABLE(); + return 0; + } +} + +GLuint GetRedBits(GLenum internalFormat) +{ + InternalFormatInfo internalFormatInfo; + if (GetInternalFormatInfo(internalFormat, &internalFormatInfo)) + { + return internalFormatInfo.mRedBits; + } + else + { + UNREACHABLE(); + return 0; + } +} + +GLuint GetGreenBits(GLenum internalFormat) +{ + InternalFormatInfo internalFormatInfo; + if (GetInternalFormatInfo(internalFormat, &internalFormatInfo)) + { + return internalFormatInfo.mGreenBits; + } + else + { + UNREACHABLE(); + return 0; + } +} + +GLuint GetBlueBits(GLenum internalFormat) +{ + InternalFormatInfo internalFormatInfo; + if (GetInternalFormatInfo(internalFormat, &internalFormatInfo)) + { + return internalFormatInfo.mBlueBits; + } + else + { + UNREACHABLE(); + return 0; + } +} + +GLuint GetLuminanceBits(GLenum internalFormat) +{ + InternalFormatInfo internalFormatInfo; + if (GetInternalFormatInfo(internalFormat, &internalFormatInfo)) + { + return internalFormatInfo.mLuminanceBits; + } + else + { + UNREACHABLE(); + return 0; + } +} + +GLuint GetDepthBits(GLenum internalFormat) +{ + InternalFormatInfo internalFormatInfo; + if (GetInternalFormatInfo(internalFormat, &internalFormatInfo)) + { + return internalFormatInfo.mDepthBits; + } + else + { + UNREACHABLE(); + return 0; + } +} + +GLuint GetStencilBits(GLenum internalFormat) +{ + InternalFormatInfo internalFormatInfo; + if (GetInternalFormatInfo(internalFormat, &internalFormatInfo)) + { + return internalFormatInfo.mStencilBits; + } + else + { + UNREACHABLE(); + return 0; + } +} + +GLuint GetTypeBytes(GLenum type) +{ + TypeInfo typeInfo; + if (GetTypeInfo(type, &typeInfo)) + { + return typeInfo.mTypeBytes; + } + else + { + UNREACHABLE(); + return 0; + } +} + +bool IsSpecialInterpretationType(GLenum type) +{ + TypeInfo typeInfo; + if (GetTypeInfo(type, &typeInfo)) + { + return typeInfo.mSpecialInterpretation; + } + else + { + UNREACHABLE(); + return false; + } +} + +bool IsFloatOrFixedComponentType(GLenum type) +{ + if (type == GL_UNSIGNED_NORMALIZED || + type == GL_SIGNED_NORMALIZED || + type == GL_FLOAT) + { + return true; + } + else + { + return false; + } +} + +GLenum GetFormat(GLenum internalFormat) +{ + InternalFormatInfo internalFormatInfo; + if (GetInternalFormatInfo(internalFormat, &internalFormatInfo)) + { + return internalFormatInfo.mFormat; + } + else + { + UNREACHABLE(); + return GL_NONE; + } +} + +GLenum GetType(GLenum internalFormat) +{ + InternalFormatInfo internalFormatInfo; + if (GetInternalFormatInfo(internalFormat, &internalFormatInfo)) + { + return internalFormatInfo.mType; + } + else + { + UNREACHABLE(); + return GL_NONE; + } +} + +GLenum GetComponentType(GLenum internalFormat) +{ + InternalFormatInfo internalFormatInfo; + if (GetInternalFormatInfo(internalFormat, &internalFormatInfo)) + { + return internalFormatInfo.mComponentType; + } + else + { + UNREACHABLE(); + return GL_NONE; + } +} + +GLuint GetComponentCount(GLenum internalFormat) +{ + InternalFormatInfo internalFormatInfo; + if (GetInternalFormatInfo(internalFormat, &internalFormatInfo)) + { + return internalFormatInfo.mComponentCount; + } + else + { + UNREACHABLE(); + return false; + } +} + +GLenum GetColorEncoding(GLenum internalFormat) +{ + InternalFormatInfo internalFormatInfo; + if (GetInternalFormatInfo(internalFormat, &internalFormatInfo)) + { + return internalFormatInfo.mColorEncoding; + } + else + { + UNREACHABLE(); + return false; + } +} + +GLuint GetRowPitch(GLenum internalFormat, GLenum type, GLsizei width, GLint alignment) +{ + ASSERT(alignment > 0 && isPow2(alignment)); + return rx::roundUp(GetBlockSize(internalFormat, type, width, 1), static_cast<GLuint>(alignment)); +} + +GLuint GetDepthPitch(GLenum internalFormat, GLenum type, GLsizei width, GLsizei height, GLint alignment) +{ + return GetRowPitch(internalFormat, type, width, alignment) * height; +} + +GLuint GetBlockSize(GLenum internalFormat, GLenum type, GLsizei width, GLsizei height) +{ + InternalFormatInfo internalFormatInfo; + if (GetInternalFormatInfo(internalFormat, &internalFormatInfo)) + { + if (internalFormatInfo.mIsCompressed) + { + GLsizei numBlocksWide = (width + internalFormatInfo.mCompressedBlockWidth - 1) / internalFormatInfo.mCompressedBlockWidth; + GLsizei numBlocksHight = (height + internalFormatInfo.mCompressedBlockHeight - 1) / internalFormatInfo.mCompressedBlockHeight; + + return (internalFormatInfo.mPixelBits * numBlocksWide * numBlocksHight) / 8; + } + else + { + TypeInfo typeInfo; + if (GetTypeInfo(type, &typeInfo)) + { + if (typeInfo.mSpecialInterpretation) + { + return typeInfo.mTypeBytes * width * height; + } + else + { + return internalFormatInfo.mComponentCount * typeInfo.mTypeBytes * width * height; + } + } + else + { + UNREACHABLE(); + return 0; + } + } + } + else + { + UNREACHABLE(); + return 0; + } +} + +bool IsFormatCompressed(GLenum internalFormat) +{ + InternalFormatInfo internalFormatInfo; + if (GetInternalFormatInfo(internalFormat, &internalFormatInfo)) + { + return internalFormatInfo.mIsCompressed; + } + else + { + UNREACHABLE(); + return false; + } +} + +GLuint GetCompressedBlockWidth(GLenum internalFormat) +{ + InternalFormatInfo internalFormatInfo; + if (GetInternalFormatInfo(internalFormat, &internalFormatInfo)) + { + return internalFormatInfo.mCompressedBlockWidth; + } + else + { + UNREACHABLE(); + return 0; + } +} + +GLuint GetCompressedBlockHeight(GLenum internalFormat) +{ + InternalFormatInfo internalFormatInfo; + if (GetInternalFormatInfo(internalFormat, &internalFormatInfo)) + { + return internalFormatInfo.mCompressedBlockHeight; + } + else + { + UNREACHABLE(); + return 0; + } +} + +const FormatSet &GetAllSizedInternalFormats() +{ + static FormatSet formatSet = BuildAllSizedInternalFormatSet(); + return formatSet; +} + +ColorWriteFunction GetColorWriteFunction(GLenum format, GLenum type) +{ + static const FormatMap &formats = GetFormatMap(); + FormatMap::const_iterator iter = formats.find(FormatTypePair(format, type)); + return (iter != formats.end()) ? iter->second.mColorWriteFunction : NULL; +} + +} |