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android / platform / external / chromium_org / third_party / angle / 5c1e58d044616ba1b083dd44a2db3c3edb9890eb / . / src / libGLESv2 / formatutils.cpp
blob: 8cc2e19a835821189f30d730d53b537148dcedb5 [file] [log] [blame]
#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;
}
}