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|
//
// Copyright (c) 2015 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.
//
// formatutilsgl.cpp: Queries for GL image formats and their translations to native
// GL formats.
#include "libANGLE/renderer/gl/formatutilsgl.h"
#include <limits>
#include "common/string_utils.h"
#include "libANGLE/formatutils.h"
namespace rx
{
namespace nativegl
{
SupportRequirement::SupportRequirement()
: version(std::numeric_limits<GLuint>::max(), std::numeric_limits<GLuint>::max()),
versionExtensions(),
requiredExtensions()
{
}
InternalFormat::InternalFormat()
: texture(),
filter(),
renderbuffer(),
framebufferAttachment()
{
}
// supported = version || vertexExt
static inline SupportRequirement VersionOrExts(GLuint major, GLuint minor, const std::string &versionExt)
{
SupportRequirement requirement;
requirement.version.major = major;
requirement.version.minor = minor;
angle::SplitStringAlongWhitespace(versionExt, &requirement.versionExtensions);
return requirement;
}
// supported = (version || vertexExt) && requiredExt
static inline SupportRequirement VersionOrExtsAndExts(GLuint major,
GLuint minor,
const std::string &versionExt,
const std::string &requiredExt)
{
SupportRequirement requirement;
requirement.version.major = major;
requirement.version.minor = minor;
angle::SplitStringAlongWhitespace(versionExt, &requirement.versionExtensions);
angle::SplitStringAlongWhitespace(requiredExt, &requirement.requiredExtensions);
return requirement;
}
// supported = version
static inline SupportRequirement VersionOnly(GLuint major, GLuint minor)
{
SupportRequirement requirement;
requirement.version.major = major;
requirement.version.minor = minor;
return requirement;
}
// supported = ext
static inline SupportRequirement ExtsOnly(const std::string &ext)
{
SupportRequirement requirement;
requirement.version.major = 0;
requirement.version.minor = 0;
angle::SplitStringAlongWhitespace(ext, &requirement.requiredExtensions);
return requirement;
}
// supported = true
static inline SupportRequirement AlwaysSupported()
{
SupportRequirement requirement;
requirement.version.major = 0;
requirement.version.minor = 0;
return requirement;
}
// supported = false
static inline SupportRequirement NeverSupported()
{
SupportRequirement requirement;
requirement.version.major = std::numeric_limits<GLuint>::max();
requirement.version.minor = std::numeric_limits<GLuint>::max();
return requirement;
}
struct InternalFormatInfo
{
InternalFormat glesInfo;
InternalFormat glInfo;
};
typedef std::pair<GLenum, InternalFormatInfo> InternalFormatInfoPair;
typedef std::map<GLenum, InternalFormatInfo> InternalFormatInfoMap;
// A helper function to insert data into the format map with fewer characters.
static inline void InsertFormatMapping(InternalFormatInfoMap *map, GLenum internalFormat,
const SupportRequirement &desktopTexture, const SupportRequirement &desktopFilter, const SupportRequirement &desktopRender,
const SupportRequirement &esTexture, const SupportRequirement &esFilter, const SupportRequirement &esRender)
{
InternalFormatInfo formatInfo;
formatInfo.glInfo.texture = desktopTexture;
formatInfo.glInfo.filter = desktopFilter;
formatInfo.glInfo.renderbuffer = desktopRender;
formatInfo.glInfo.framebufferAttachment = desktopRender;
formatInfo.glesInfo.texture = esTexture;
formatInfo.glesInfo.filter = esTexture;
formatInfo.glesInfo.renderbuffer = esFilter;
formatInfo.glesInfo.framebufferAttachment = esRender;
map->insert(std::make_pair(internalFormat, formatInfo));
}
static InternalFormatInfoMap BuildInternalFormatInfoMap()
{
InternalFormatInfoMap map;
// clang-format off
// | Format | OpenGL texture support | Filter | OpenGL render support | OpenGL ES texture support | Filter | OpenGL ES render support |
InsertFormatMapping(&map, GL_R8, VersionOrExts(3, 0, "GL_ARB_texture_rg"), AlwaysSupported(), VersionOrExts(3, 0, "GL_ARB_texture_rg"), VersionOrExts(3, 0, "GL_EXT_texture_rg"), AlwaysSupported(), VersionOrExts(3, 0, "GL_EXT_texture_rg") );
InsertFormatMapping(&map, GL_R8_SNORM, VersionOnly(3, 1), AlwaysSupported(), NeverSupported(), VersionOnly(3, 0), AlwaysSupported(), NeverSupported() );
InsertFormatMapping(&map, GL_RG8, VersionOrExts(3, 0, "GL_ARB_texture_rg"), AlwaysSupported(), VersionOrExts(3, 0, "GL_ARB_texture_rg"), VersionOrExts(3, 0, "GL_EXT_texture_rg"), AlwaysSupported(), VersionOrExts(3, 0, "GL_ARB_texture_rg") );
InsertFormatMapping(&map, GL_RG8_SNORM, VersionOnly(3, 1), AlwaysSupported(), NeverSupported(), VersionOnly(3, 0), AlwaysSupported(), NeverSupported() );
InsertFormatMapping(&map, GL_RGB8, AlwaysSupported(), AlwaysSupported(), AlwaysSupported(), VersionOrExts(3, 0, "GL_OES_rgb8_rgba8"), AlwaysSupported(), AlwaysSupported() );
InsertFormatMapping(&map, GL_RG8_SNORM, VersionOnly(3, 1), AlwaysSupported(), NeverSupported(), VersionOnly(3, 0), AlwaysSupported(), NeverSupported() );
InsertFormatMapping(&map, GL_RGB565, AlwaysSupported(), AlwaysSupported(), AlwaysSupported(), AlwaysSupported(), AlwaysSupported(), AlwaysSupported() );
InsertFormatMapping(&map, GL_RGBA4, AlwaysSupported(), AlwaysSupported(), AlwaysSupported(), AlwaysSupported(), AlwaysSupported(), AlwaysSupported() );
InsertFormatMapping(&map, GL_RGB5_A1, AlwaysSupported(), AlwaysSupported(), AlwaysSupported(), AlwaysSupported(), AlwaysSupported(), AlwaysSupported() );
InsertFormatMapping(&map, GL_RGBA8, AlwaysSupported(), AlwaysSupported(), AlwaysSupported(), VersionOrExts(3, 0, "GL_OES_rgb8_rgba8"), AlwaysSupported(), VersionOrExts(3, 0, "GL_OES_rgb8_rgba8") );
InsertFormatMapping(&map, GL_RGBA8_SNORM, VersionOnly(3, 1), AlwaysSupported(), NeverSupported(), VersionOnly(3, 0), AlwaysSupported(), NeverSupported() );
InsertFormatMapping(&map, GL_RGB10_A2, AlwaysSupported(), AlwaysSupported(), AlwaysSupported(), VersionOnly(3, 0), AlwaysSupported(), VersionOnly(3, 0) );
InsertFormatMapping(&map, GL_RGB10_A2UI, VersionOrExts(3, 3, "GL_ARB_texture_rgb10_a2ui"), NeverSupported(), AlwaysSupported(), VersionOnly(3, 0), NeverSupported(), AlwaysSupported() );
InsertFormatMapping(&map, GL_SRGB8, VersionOrExts(2, 1, "GL_EXT_texture_sRGB"), AlwaysSupported(), VersionOrExts(2, 1, "GL_EXT_texture_sRGB"), VersionOnly(3, 0), AlwaysSupported(), NeverSupported() );
InsertFormatMapping(&map, GL_SRGB8_ALPHA8, VersionOrExts(2, 1, "GL_EXT_texture_sRGB"), AlwaysSupported(), VersionOrExts(2, 1, "GL_EXT_texture_sRGB"), VersionOnly(3, 0), AlwaysSupported(), VersionOrExts(3, 0, "GL_EXT_sRGB") );
InsertFormatMapping(&map, GL_R8I, VersionOrExts(3, 0, "GL_ARB_texture_rg"), NeverSupported(), VersionOrExts(3, 0, "GL_ARB_texture_rg"), VersionOnly(3, 0), NeverSupported(), VersionOnly(3, 0) );
InsertFormatMapping(&map, GL_R8UI, VersionOrExts(3, 0, "GL_ARB_texture_rg"), NeverSupported(), VersionOrExts(3, 0, "GL_ARB_texture_rg"), VersionOnly(3, 0), NeverSupported(), VersionOnly(3, 0) );
InsertFormatMapping(&map, GL_R16I, VersionOrExts(3, 0, "GL_ARB_texture_rg"), NeverSupported(), VersionOrExts(3, 0, "GL_ARB_texture_rg"), VersionOnly(3, 0), NeverSupported(), VersionOnly(3, 0) );
InsertFormatMapping(&map, GL_R16UI, VersionOrExts(3, 0, "GL_ARB_texture_rg"), NeverSupported(), VersionOrExts(3, 0, "GL_ARB_texture_rg"), VersionOnly(3, 0), NeverSupported(), VersionOnly(3, 0) );
InsertFormatMapping(&map, GL_R32I, VersionOrExts(3, 0, "GL_ARB_texture_rg"), NeverSupported(), VersionOrExts(3, 0, "GL_ARB_texture_rg"), VersionOnly(3, 0), NeverSupported(), VersionOnly(3, 0) );
InsertFormatMapping(&map, GL_R32UI, VersionOrExts(3, 0, "GL_ARB_texture_rg"), NeverSupported(), VersionOrExts(3, 0, "GL_ARB_texture_rg"), VersionOnly(3, 0), NeverSupported(), VersionOnly(3, 0) );
InsertFormatMapping(&map, GL_RG8I, VersionOrExts(3, 0, "GL_ARB_texture_rg"), NeverSupported(), VersionOrExts(3, 0, "GL_ARB_texture_rg"), VersionOnly(3, 0), NeverSupported(), VersionOnly(3, 0) );
InsertFormatMapping(&map, GL_RG8UI, VersionOrExts(3, 0, "GL_ARB_texture_rg"), NeverSupported(), VersionOrExts(3, 0, "GL_ARB_texture_rg"), VersionOnly(3, 0), NeverSupported(), VersionOnly(3, 0) );
InsertFormatMapping(&map, GL_RG16I, VersionOrExts(3, 0, "GL_ARB_texture_rg"), NeverSupported(), VersionOrExts(3, 0, "GL_ARB_texture_rg"), VersionOnly(3, 0), NeverSupported(), VersionOnly(3, 0) );
InsertFormatMapping(&map, GL_RG16UI, VersionOrExts(3, 0, "GL_ARB_texture_rg"), NeverSupported(), VersionOrExts(3, 0, "GL_ARB_texture_rg"), VersionOnly(3, 0), NeverSupported(), VersionOnly(3, 0) );
InsertFormatMapping(&map, GL_RG32I, VersionOrExts(3, 0, "GL_ARB_texture_rg"), NeverSupported(), VersionOrExts(3, 0, "GL_ARB_texture_rg"), VersionOnly(3, 0), NeverSupported(), VersionOnly(3, 0) );
InsertFormatMapping(&map, GL_RG32UI, VersionOrExts(3, 0, "GL_ARB_texture_rg"), NeverSupported(), VersionOrExts(3, 0, "GL_ARB_texture_rg"), VersionOnly(3, 0), NeverSupported(), VersionOnly(3, 0) );
InsertFormatMapping(&map, GL_RGB8I, VersionOrExts(3, 0, "GL_EXT_texture_integer"), NeverSupported(), NeverSupported(), VersionOnly(3, 0), NeverSupported(), NeverSupported() );
InsertFormatMapping(&map, GL_RGB8UI, VersionOrExts(3, 0, "GL_EXT_texture_integer"), NeverSupported(), NeverSupported(), VersionOnly(3, 0), NeverSupported(), NeverSupported() );
InsertFormatMapping(&map, GL_RGB16I, VersionOrExts(3, 0, "GL_EXT_texture_integer"), NeverSupported(), NeverSupported(), VersionOnly(3, 0), NeverSupported(), NeverSupported() );
InsertFormatMapping(&map, GL_RGB16UI, VersionOrExts(3, 0, "GL_EXT_texture_integer"), NeverSupported(), NeverSupported(), VersionOnly(3, 0), NeverSupported(), NeverSupported() );
InsertFormatMapping(&map, GL_RGB32I, VersionOrExts(3, 0, "GL_EXT_texture_integer"), NeverSupported(), NeverSupported(), VersionOnly(3, 0), NeverSupported(), NeverSupported() );
InsertFormatMapping(&map, GL_RGB32UI, VersionOrExts(3, 0, "GL_EXT_texture_integer"), NeverSupported(), NeverSupported(), VersionOnly(3, 0), NeverSupported(), NeverSupported() );
InsertFormatMapping(&map, GL_RGBA8I, VersionOrExts(3, 0, "GL_EXT_texture_integer"), NeverSupported(), VersionOrExts(3, 0, "GL_EXT_texture_integer"), VersionOnly(3, 0), NeverSupported(), VersionOnly(3, 0) );
InsertFormatMapping(&map, GL_RGBA8UI, VersionOrExts(3, 0, "GL_EXT_texture_integer"), NeverSupported(), VersionOrExts(3, 0, "GL_EXT_texture_integer"), VersionOnly(3, 0), NeverSupported(), VersionOnly(3, 0) );
InsertFormatMapping(&map, GL_RGBA16I, VersionOrExts(3, 0, "GL_EXT_texture_integer"), NeverSupported(), VersionOrExts(3, 0, "GL_EXT_texture_integer"), VersionOnly(3, 0), NeverSupported(), VersionOnly(3, 0) );
InsertFormatMapping(&map, GL_RGBA16UI, VersionOrExts(3, 0, "GL_EXT_texture_integer"), NeverSupported(), VersionOrExts(3, 0, "GL_EXT_texture_integer"), VersionOnly(3, 0), NeverSupported(), VersionOnly(3, 0) );
InsertFormatMapping(&map, GL_RGBA32I, VersionOrExts(3, 0, "GL_EXT_texture_integer"), NeverSupported(), VersionOrExts(3, 0, "GL_EXT_texture_integer"), VersionOnly(3, 0), NeverSupported(), VersionOnly(3, 0) );
InsertFormatMapping(&map, GL_RGBA32UI, VersionOrExts(3, 0, "GL_EXT_texture_integer"), NeverSupported(), VersionOrExts(3, 0, "GL_EXT_texture_integer"), VersionOnly(3, 0), NeverSupported(), VersionOnly(3, 0) );
// Unsized formats
InsertFormatMapping(&map, GL_ALPHA, NeverSupported(), NeverSupported(), NeverSupported(), NeverSupported(), NeverSupported(), NeverSupported() );
InsertFormatMapping(&map, GL_LUMINANCE, NeverSupported(), NeverSupported(), NeverSupported(), NeverSupported(), NeverSupported(), NeverSupported() );
InsertFormatMapping(&map, GL_LUMINANCE_ALPHA, NeverSupported(), NeverSupported(), NeverSupported(), NeverSupported(), NeverSupported(), NeverSupported() );
InsertFormatMapping(&map, GL_RED, VersionOrExts(3, 0, "GL_ARB_texture_rg"), AlwaysSupported(), VersionOrExts(3, 0, "GL_ARB_texture_rg"), VersionOrExts(3, 0, "GL_EXT_texture_rg"), AlwaysSupported(), VersionOrExts(3, 0, "GL_ARB_texture_rg") );
InsertFormatMapping(&map, GL_RG, VersionOrExts(3, 0, "GL_ARB_texture_rg"), AlwaysSupported(), VersionOrExts(3, 0, "GL_ARB_texture_rg"), VersionOrExts(3, 0, "GL_EXT_texture_rg"), AlwaysSupported(), VersionOrExts(3, 0, "GL_ARB_texture_rg") );
InsertFormatMapping(&map, GL_RGB, AlwaysSupported(), AlwaysSupported(), AlwaysSupported(), AlwaysSupported(), AlwaysSupported(), AlwaysSupported() );
InsertFormatMapping(&map, GL_RGBA, AlwaysSupported(), AlwaysSupported(), AlwaysSupported(), AlwaysSupported(), AlwaysSupported(), AlwaysSupported() );
InsertFormatMapping(&map, GL_RED_INTEGER, VersionOrExts(3, 0, "GL_ARB_texture_rg"), NeverSupported(), VersionOrExts(3, 0, "GL_ARB_texture_rg"), VersionOnly(3, 0), NeverSupported(), VersionOnly(3, 0) );
InsertFormatMapping(&map, GL_RG_INTEGER, VersionOrExts(3, 0, "GL_ARB_texture_rg"), NeverSupported(), VersionOrExts(3, 0, "GL_ARB_texture_rg"), VersionOnly(3, 0), NeverSupported(), VersionOnly(3, 0) );
InsertFormatMapping(&map, GL_RGB_INTEGER, VersionOrExts(3, 0, "GL_EXT_texture_integer"), NeverSupported(), NeverSupported(), VersionOnly(3, 0), NeverSupported(), NeverSupported() );
InsertFormatMapping(&map, GL_RGBA_INTEGER, VersionOrExts(3, 0, "GL_EXT_texture_integer"), NeverSupported(), VersionOrExts(3, 0, "GL_EXT_texture_integer"), VersionOnly(3, 0), NeverSupported(), VersionOnly(3, 0) );
InsertFormatMapping(&map, GL_SRGB, VersionOrExts(2, 1, "GL_EXT_texture_sRGB"), AlwaysSupported(), VersionOrExts(2, 1, "GL_EXT_texture_sRGB"), ExtsOnly("GL_EXT_sRGB"), AlwaysSupported(), NeverSupported() );
InsertFormatMapping(&map, GL_SRGB_ALPHA, VersionOrExts(2, 1, "GL_EXT_texture_sRGB"), AlwaysSupported(), VersionOrExts(2, 1, "GL_EXT_texture_sRGB"), ExtsOnly("GL_EXT_sRGB"), AlwaysSupported(), NeverSupported() );
// From GL_EXT_texture_format_BGRA8888
InsertFormatMapping(&map, GL_BGRA8_EXT, VersionOrExts(1, 2, "GL_EXT_bgra"), AlwaysSupported(), VersionOrExts(1, 2, "GL_EXT_bgra"), ExtsOnly("GL_EXT_texture_format_BGRA8888"), AlwaysSupported(), NeverSupported() );
InsertFormatMapping(&map, GL_BGRA_EXT, VersionOrExts(1, 2, "GL_EXT_bgra"), AlwaysSupported(), VersionOrExts(1, 2, "GL_EXT_bgra"), ExtsOnly("GL_EXT_texture_format_BGRA8888"), AlwaysSupported(), NeverSupported() );
// Floating point formats
// | Format | OpenGL texture support | Filter | OpenGL render support | OpenGL ES texture support | Filter | OpenGL ES render support |
InsertFormatMapping(&map, GL_R11F_G11F_B10F, VersionOrExts(3, 0, "GL_EXT_packed_float"), AlwaysSupported(), VersionOrExts(3, 0, "GL_EXT_packed_float GL_ARB_color_buffer_float"), VersionOnly(3, 0), AlwaysSupported(), ExtsOnly("GL_EXT_color_buffer_float") );
InsertFormatMapping(&map, GL_RGB9_E5, VersionOrExts(3, 0, "GL_EXT_texture_shared_exponent"), AlwaysSupported(), VersionOrExts(3, 0, "GL_EXT_texture_shared_exponent GL_ARB_color_buffer_float"), VersionOnly(3, 0), AlwaysSupported(), NeverSupported() );
InsertFormatMapping(&map, GL_R16F, VersionOrExts(3, 0, "GL_ARB_texture_rg ARB_texture_float"), AlwaysSupported(), VersionOrExts(3, 0, "GL_ARB_texture_rg GL_ARB_texture_float GL_ARB_color_buffer_float"), VersionOrExts(3, 0, "GL_OES_texture_half_float GL_EXT_texture_rg"), VersionOrExts(3, 0, "GL_OES_texture_half_float_linear"), VersionOrExtsAndExts(3, 0, "GL_EXT_texture_rg", "GL_EXT_color_buffer_half_float"));
InsertFormatMapping(&map, GL_RG16F, VersionOrExts(3, 0, "GL_ARB_texture_rg ARB_texture_float"), AlwaysSupported(), VersionOrExts(3, 0, "GL_ARB_texture_rg GL_ARB_texture_float GL_ARB_color_buffer_float"), VersionOrExts(3, 0, "GL_OES_texture_half_float GL_EXT_texture_rg"), VersionOrExts(3, 0, "GL_OES_texture_half_float_linear"), VersionOrExtsAndExts(3, 0, "GL_EXT_texture_rg", "GL_EXT_color_buffer_half_float"));
InsertFormatMapping(&map, GL_RGB16F, VersionOrExts(3, 0, "GL_ARB_texture_float"), AlwaysSupported(), VersionOrExts(3, 0, "GL_ARB_texture_float GL_ARB_color_buffer_float"), VersionOrExts(3, 0, "GL_OES_texture_half_float"), VersionOrExts(3, 0, "GL_OES_texture_half_float_linear"), ExtsOnly("GL_EXT_color_buffer_half_float") );
InsertFormatMapping(&map, GL_RGBA16F, VersionOrExts(3, 0, "GL_ARB_texture_float"), AlwaysSupported(), VersionOrExts(3, 0, "GL_ARB_texture_float GL_ARB_color_buffer_float"), VersionOrExts(3, 0, "GL_OES_texture_half_float"), VersionOrExts(3, 0, "GL_OES_texture_half_float_linear"), ExtsOnly("GL_EXT_color_buffer_half_float") );
InsertFormatMapping(&map, GL_R32F, VersionOrExts(3, 0, "GL_ARB_texture_rg GL_ARB_texture_float"), AlwaysSupported(), VersionOrExts(3, 0, "GL_ARB_texture_rg GL_ARB_texture_float GL_ARB_color_buffer_float"), VersionOrExts(3, 0, "GL_OES_texture_float GL_EXT_texture_rg"), VersionOrExts(3, 0, "GL_OES_texture_float_linear"), ExtsOnly("GL_EXT_color_buffer_float") );
InsertFormatMapping(&map, GL_RG32F, VersionOrExts(3, 0, "GL_ARB_texture_rg GL_ARB_texture_float"), AlwaysSupported(), VersionOrExts(3, 0, "GL_ARB_texture_rg GL_ARB_texture_float GL_ARB_color_buffer_float"), VersionOrExts(3, 0, "GL_OES_texture_float GL_EXT_texture_rg"), VersionOrExts(3, 0, "GL_OES_texture_float_linear"), ExtsOnly("GL_EXT_color_buffer_float") );
InsertFormatMapping(&map, GL_RGB32F, VersionOrExts(3, 0, "GL_ARB_texture_float"), AlwaysSupported(), VersionOrExts(3, 0, "GL_ARB_texture_float GL_ARB_color_buffer_float"), VersionOrExts(3, 0, "GL_OES_texture_float"), VersionOrExts(3, 0, "GL_OES_texture_float_linear"), NeverSupported() );
InsertFormatMapping(&map, GL_RGBA32F, VersionOrExts(3, 0, "GL_ARB_texture_float"), AlwaysSupported(), VersionOrExts(3, 0, "GL_ARB_texture_float GL_ARB_color_buffer_float"), VersionOrExts(3, 0, "GL_OES_texture_float"), VersionOrExts(3, 0, "GL_OES_texture_float_linear"), ExtsOnly("GL_EXT_color_buffer_float") );
// Depth stencil formats
// | Format | OpenGL texture support | Filter | OpenGL render support | OpenGL ES texture support | Filter | OpenGL ES render support |
InsertFormatMapping(&map, GL_DEPTH_COMPONENT16, VersionOnly(1, 5), VersionOrExts(1, 5, "GL_ARB_depth_texture"), VersionOnly(1, 5), VersionOnly(2, 0), VersionOrExts(3, 0, "GL_OES_depth_texture"), VersionOnly(2, 0) );
InsertFormatMapping(&map, GL_DEPTH_COMPONENT24, VersionOnly(1, 5), VersionOrExts(1, 5, "GL_ARB_depth_texture"), VersionOnly(1, 5), VersionOnly(2, 0), VersionOrExts(3, 0, "GL_OES_depth_texture"), VersionOnly(2, 0) );
InsertFormatMapping(&map, GL_DEPTH_COMPONENT32_OES, VersionOnly(1, 5), VersionOrExts(1, 5, "GL_ARB_depth_texture"), VersionOnly(1, 5), ExtsOnly("GL_OES_depth_texture"), AlwaysSupported(), ExtsOnly("GL_OES_depth32") );
InsertFormatMapping(&map, GL_DEPTH_COMPONENT32F, VersionOrExts(3, 0, "GL_ARB_depth_buffer_float"), AlwaysSupported(), VersionOrExts(3, 0, "GL_ARB_depth_buffer_float"), VersionOnly(3, 0), VersionOrExts(3, 0, "GL_OES_depth_texture"), VersionOnly(3, 0) );
InsertFormatMapping(&map, GL_STENCIL_INDEX8, VersionOrExts(3, 0, "GL_EXT_packed_depth_stencil"), NeverSupported(), VersionOrExts(3, 0, "GL_EXT_packed_depth_stencil"), VersionOnly(2, 0), NeverSupported(), VersionOnly(2, 0) );
InsertFormatMapping(&map, GL_DEPTH24_STENCIL8, VersionOrExts(3, 0, "GL_ARB_framebuffer_object"), VersionOrExts(3, 0, "GL_ARB_depth_texture"), VersionOrExts(3, 0, "GL_ARB_framebuffer_object"), VersionOrExts(3, 0, "GL_OES_depth_texture"), AlwaysSupported(), VersionOrExts(3, 0, "GL_OES_depth_texture GL_OES_packed_depth_stencil"));
InsertFormatMapping(&map, GL_DEPTH32F_STENCIL8, VersionOrExts(3, 0, "GL_ARB_depth_buffer_float"), AlwaysSupported(), VersionOrExts(3, 0, "GL_ARB_depth_buffer_float"), VersionOnly(3, 0), AlwaysSupported(), VersionOnly(3, 0) );
InsertFormatMapping(&map, GL_DEPTH_COMPONENT, VersionOnly(1, 5), VersionOrExts(1, 5, "GL_ARB_depth_texture"), VersionOnly(1, 5), VersionOnly(2, 0), VersionOrExts(3, 0, "GL_OES_depth_texture"), VersionOnly(2, 0) );
InsertFormatMapping(&map, GL_DEPTH_STENCIL, VersionOnly(1, 5), VersionOrExts(1, 5, "GL_ARB_depth_texture"), VersionOnly(1, 5), VersionOnly(2, 0), VersionOrExts(3, 0, "GL_OES_depth_texture"), VersionOnly(2, 0) );
// Luminance alpha formats
// | Format | OpenGL texture support | Filter | Render | OpenGL ES texture support | Filter | Render |
InsertFormatMapping(&map, GL_ALPHA8_EXT, AlwaysSupported(), AlwaysSupported(), NeverSupported(), ExtsOnly("GL_EXT_texture_storage"), AlwaysSupported(), NeverSupported());
InsertFormatMapping(&map, GL_LUMINANCE8_EXT, AlwaysSupported(), AlwaysSupported(), NeverSupported(), ExtsOnly("GL_EXT_texture_storage"), AlwaysSupported(), NeverSupported());
InsertFormatMapping(&map, GL_ALPHA32F_EXT, VersionOrExts(3, 0, "GL_ARB_texture_float"), AlwaysSupported(), NeverSupported(), ExtsOnly("GL_EXT_texture_storage"), AlwaysSupported(), NeverSupported());
InsertFormatMapping(&map, GL_LUMINANCE32F_EXT, VersionOrExts(3, 0, "GL_ARB_texture_float"), AlwaysSupported(), NeverSupported(), ExtsOnly("GL_EXT_texture_storage"), AlwaysSupported(), NeverSupported());
InsertFormatMapping(&map, GL_ALPHA16F_EXT, VersionOrExts(3, 0, "GL_ARB_texture_float"), AlwaysSupported(), NeverSupported(), ExtsOnly("GL_EXT_texture_storage"), AlwaysSupported(), NeverSupported());
InsertFormatMapping(&map, GL_LUMINANCE16F_EXT, VersionOrExts(3, 0, "GL_ARB_texture_float"), AlwaysSupported(), NeverSupported(), ExtsOnly("GL_EXT_texture_storage"), AlwaysSupported(), NeverSupported());
InsertFormatMapping(&map, GL_LUMINANCE8_ALPHA8_EXT, AlwaysSupported(), AlwaysSupported(), NeverSupported(), ExtsOnly("GL_EXT_texture_storage"), AlwaysSupported(), NeverSupported());
InsertFormatMapping(&map, GL_LUMINANCE_ALPHA32F_EXT, VersionOrExts(3, 0, "GL_ARB_texture_float"), AlwaysSupported(), NeverSupported(), ExtsOnly("GL_EXT_texture_storage"), AlwaysSupported(), NeverSupported());
InsertFormatMapping(&map, GL_LUMINANCE_ALPHA16F_EXT, VersionOrExts(3, 0, "GL_ARB_texture_float"), AlwaysSupported(), NeverSupported(), ExtsOnly("GL_EXT_texture_storage"), AlwaysSupported(), NeverSupported());
// Compressed formats, From ES 3.0.1 spec, table 3.16
InsertFormatMapping(&map, GL_COMPRESSED_R11_EAC, VersionOrExts(4, 3, "GL_ARB_ES3_compatibility"), AlwaysSupported(), NeverSupported(), VersionOnly(3, 0), AlwaysSupported(), NeverSupported());
InsertFormatMapping(&map, GL_COMPRESSED_SIGNED_R11_EAC, VersionOrExts(4, 3, "GL_ARB_ES3_compatibility"), AlwaysSupported(), NeverSupported(), VersionOnly(3, 0), AlwaysSupported(), NeverSupported());
InsertFormatMapping(&map, GL_COMPRESSED_RG11_EAC, VersionOrExts(4, 3, "GL_ARB_ES3_compatibility"), AlwaysSupported(), NeverSupported(), VersionOnly(3, 0), AlwaysSupported(), NeverSupported());
InsertFormatMapping(&map, GL_COMPRESSED_SIGNED_RG11_EAC, VersionOrExts(4, 3, "GL_ARB_ES3_compatibility"), AlwaysSupported(), NeverSupported(), VersionOnly(3, 0), AlwaysSupported(), NeverSupported());
InsertFormatMapping(&map, GL_COMPRESSED_RGB8_ETC2, VersionOrExts(4, 3, "GL_ARB_ES3_compatibility"), AlwaysSupported(), NeverSupported(), VersionOnly(3, 0), AlwaysSupported(), NeverSupported());
InsertFormatMapping(&map, GL_COMPRESSED_SRGB8_ETC2, VersionOrExts(4, 3, "GL_ARB_ES3_compatibility"), AlwaysSupported(), NeverSupported(), VersionOnly(3, 0), AlwaysSupported(), NeverSupported());
InsertFormatMapping(&map, GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2, VersionOrExts(4, 3, "GL_ARB_ES3_compatibility"), AlwaysSupported(), NeverSupported(), VersionOnly(3, 0), AlwaysSupported(), NeverSupported());
InsertFormatMapping(&map, GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2, VersionOrExts(4, 3, "GL_ARB_ES3_compatibility"), AlwaysSupported(), NeverSupported(), VersionOnly(3, 0), AlwaysSupported(), NeverSupported());
InsertFormatMapping(&map, GL_COMPRESSED_RGBA8_ETC2_EAC, VersionOrExts(4, 3, "GL_ARB_ES3_compatibility"), AlwaysSupported(), NeverSupported(), VersionOnly(3, 0), AlwaysSupported(), NeverSupported());
InsertFormatMapping(&map, GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC, VersionOrExts(4, 3, "GL_ARB_ES3_compatibility"), AlwaysSupported(), NeverSupported(), VersionOnly(3, 0), AlwaysSupported(), NeverSupported());
// From GL_EXT_texture_compression_dxt1
// | Format | OpenGL texture support | Filter | Render | OpenGL ES texture support | Filter | Render |
InsertFormatMapping(&map, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, ExtsOnly("GL_EXT_texture_compression_s3tc"), AlwaysSupported(), NeverSupported(), ExtsOnly("GL_EXT_texture_compression_dxt1"), AlwaysSupported(), NeverSupported());
InsertFormatMapping(&map, GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, ExtsOnly("GL_EXT_texture_compression_s3tc"), AlwaysSupported(), NeverSupported(), ExtsOnly("GL_EXT_texture_compression_dxt1"), AlwaysSupported(), NeverSupported());
// From GL_ANGLE_texture_compression_dxt3
InsertFormatMapping(&map, GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE, ExtsOnly("GL_EXT_texture_compression_s3tc"), AlwaysSupported(), NeverSupported(), ExtsOnly("GL_ANGLE_texture_compression_dxt3"), AlwaysSupported(), NeverSupported());
// From GL_ANGLE_texture_compression_dxt5
InsertFormatMapping(&map, GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE, ExtsOnly("GL_EXT_texture_compression_s3tc"), AlwaysSupported(), NeverSupported(), ExtsOnly("GL_ANGLE_texture_compression_dxt5"), AlwaysSupported(), NeverSupported());
// From GL_ETC1_RGB8_OES
InsertFormatMapping(&map, GL_ETC1_RGB8_OES, VersionOrExts(4, 3, "GL_ARB_ES3_compatibility"), AlwaysSupported(), NeverSupported(), VersionOrExts(3, 0, "GL_ETC1_RGB8_OES"), AlwaysSupported(), NeverSupported());
// clang-format on
return map;
}
static const InternalFormatInfoMap &GetInternalFormatMap()
{
static const InternalFormatInfoMap formatMap = BuildInternalFormatInfoMap();
return formatMap;
}
const InternalFormat &GetInternalFormatInfo(GLenum internalFormat, StandardGL standard)
{
const InternalFormatInfoMap &formatMap = GetInternalFormatMap();
InternalFormatInfoMap::const_iterator iter = formatMap.find(internalFormat);
if (iter != formatMap.end())
{
const InternalFormatInfo &info = iter->second;
switch (standard)
{
case STANDARD_GL_ES: return info.glesInfo;
case STANDARD_GL_DESKTOP: return info.glInfo;
default: UNREACHABLE(); break;
}
}
static const InternalFormat defaultInternalFormat;
return defaultInternalFormat;
}
static GLenum GetNativeInternalFormat(const FunctionsGL *functions,
const WorkaroundsGL &workarounds,
GLenum internalFormat,
GLenum sizedInternalFormat)
{
GLenum result = internalFormat;
if (functions->standard == STANDARD_GL_DESKTOP)
{
// Use sized internal formats whenever possible to guarantee the requested precision.
// On Desktop GL, passing an internal format of GL_RGBA will generate a GL_RGBA8 texture
// even if the provided type is GL_FLOAT.
result = sizedInternalFormat;
const gl::InternalFormat &formatInfo = gl::GetInternalFormatInfo(sizedInternalFormat);
if (workarounds.avoid1BitAlphaTextureFormats && formatInfo.alphaBits == 1)
{
// Use an 8-bit format instead
result = GL_RGBA8;
}
if (workarounds.rgba4IsNotSupportedForColorRendering && sizedInternalFormat == GL_RGBA4)
{
// Use an 8-bit format instead
result = GL_RGBA8;
}
if (sizedInternalFormat == GL_RGB565 && !functions->isAtLeastGL(gl::Version(4, 1)) &&
!functions->hasGLExtension("GL_ARB_ES2_compatibility"))
{
// GL_RGB565 is required for basic ES2 functionality but was not added to desktop GL
// until 4.1.
// Work around this by using an 8-bit format instead.
result = GL_RGB8;
}
if (sizedInternalFormat == GL_BGRA8_EXT)
{
// GLES accepts GL_BGRA as an internal format but desktop GL only accepts it as a type.
// Update the internal format to GL_RGBA.
result = GL_RGBA8;
}
if ((functions->profile & GL_CONTEXT_CORE_PROFILE_BIT) != 0)
{
// Work around deprecated luminance alpha formats in the OpenGL core profile by backing
// them with R or RG textures.
if (formatInfo.format == GL_LUMINANCE || formatInfo.format == GL_ALPHA)
{
result = gl::GetSizedInternalFormat(GL_RED, formatInfo.type);
}
if (formatInfo.format == GL_LUMINANCE_ALPHA)
{
result = gl::GetSizedInternalFormat(GL_RG, formatInfo.type);
}
}
}
return result;
}
static GLenum GetNativeFormat(const FunctionsGL *functions,
const WorkaroundsGL &workarounds,
GLenum format)
{
GLenum result = format;
if (functions->standard == STANDARD_GL_DESKTOP)
{
// The ES SRGB extensions require that the provided format is GL_SRGB or SRGB_ALPHA but
// the desktop GL extensions only accept GL_RGB or GL_RGBA. Convert them.
if (format == GL_SRGB)
{
result = GL_RGB;
}
if (format == GL_SRGB_ALPHA)
{
result = GL_RGBA;
}
if ((functions->profile & GL_CONTEXT_CORE_PROFILE_BIT) != 0)
{
// Work around deprecated luminance alpha formats in the OpenGL core profile by backing
// them with R or RG textures.
if (format == GL_LUMINANCE || format == GL_ALPHA)
{
result = GL_RED;
}
if (format == GL_LUMINANCE_ALPHA)
{
result = GL_RG;
}
}
}
return result;
}
static GLenum GetNativeCompressedFormat(const FunctionsGL *functions,
const WorkaroundsGL &workarounds,
GLenum format)
{
GLenum result = format;
if (functions->standard == STANDARD_GL_DESKTOP)
{
if (format == GL_ETC1_RGB8_OES)
{
// GL_ETC1_RGB8_OES is not available in any desktop GL extension but the compression
// format is forwards compatible so just use the ETC2 format.
result = GL_COMPRESSED_RGB8_ETC2;
}
}
if (functions->isAtLeastGLES(gl::Version(3, 0)))
{
if (format == GL_ETC1_RGB8_OES)
{
// Pass GL_COMPRESSED_RGB8_ETC2 as the target format in ES3 and higher because it
// becomes a core format.
result = GL_COMPRESSED_RGB8_ETC2;
}
}
return result;
}
static GLenum GetNativeType(const FunctionsGL *functions,
const WorkaroundsGL &workarounds,
GLenum type)
{
GLenum result = type;
if (functions->standard == STANDARD_GL_DESKTOP)
{
if (type == GL_HALF_FLOAT_OES)
{
// The enums differ for the OES half float extensions and desktop GL spec. Update it.
result = GL_HALF_FLOAT;
}
}
if (functions->isAtLeastGLES(gl::Version(3, 0)))
{
if (type == GL_HALF_FLOAT_OES)
{
// The enums differ for the OES half float extensions and ES 3 spec. Update it.
result = GL_HALF_FLOAT;
}
}
return result;
}
TexImageFormat GetTexImageFormat(const FunctionsGL *functions,
const WorkaroundsGL &workarounds,
GLenum internalFormat,
GLenum format,
GLenum type)
{
TexImageFormat result;
result.internalFormat = GetNativeInternalFormat(
functions, workarounds, internalFormat, gl::GetSizedInternalFormat(internalFormat, type));
result.format = GetNativeFormat(functions, workarounds, format);
result.type = GetNativeType(functions, workarounds, type);
return result;
}
TexSubImageFormat GetTexSubImageFormat(const FunctionsGL *functions,
const WorkaroundsGL &workarounds,
GLenum format,
GLenum type)
{
TexSubImageFormat result;
result.format = GetNativeFormat(functions, workarounds, format);
result.type = GetNativeType(functions, workarounds, type);
return result;
}
CompressedTexImageFormat GetCompressedTexImageFormat(const FunctionsGL *functions,
const WorkaroundsGL &workarounds,
GLenum internalFormat)
{
CompressedTexImageFormat result;
result.internalFormat = GetNativeCompressedFormat(functions, workarounds, internalFormat);
return result;
}
CompressedTexSubImageFormat GetCompressedSubTexImageFormat(const FunctionsGL *functions,
const WorkaroundsGL &workarounds,
GLenum format)
{
CompressedTexSubImageFormat result;
result.format = GetNativeCompressedFormat(functions, workarounds, format);
return result;
}
CopyTexImageImageFormat GetCopyTexImageImageFormat(const FunctionsGL *functions,
const WorkaroundsGL &workarounds,
GLenum internalFormat,
GLenum framebufferType)
{
CopyTexImageImageFormat result;
result.internalFormat =
GetNativeInternalFormat(functions, workarounds, internalFormat,
gl::GetSizedInternalFormat(internalFormat, framebufferType));
return result;
}
TexStorageFormat GetTexStorageFormat(const FunctionsGL *functions,
const WorkaroundsGL &workarounds,
GLenum internalFormat)
{
TexStorageFormat result;
result.internalFormat =
GetNativeInternalFormat(functions, workarounds, internalFormat, internalFormat);
return result;
}
RenderbufferFormat GetRenderbufferFormat(const FunctionsGL *functions,
const WorkaroundsGL &workarounds,
GLenum internalFormat)
{
RenderbufferFormat result;
result.internalFormat =
GetNativeInternalFormat(functions, workarounds, internalFormat, internalFormat);
return result;
}
}
}
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