// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// utilities.cpp: Conversion functions and other utility routines.
#include "utilities.h"
#include "Framebuffer.h"
#include "main.h"
#include "mathutil.h"
#include "Context.h"
#include "Shader.h"
#include "common/debug.h"
#include <limits>
#include <stdio.h>
#include <stdlib.h>
namespace es2
{
unsigned int UniformComponentCount(GLenum type)
{
switch(type)
{
case GL_BOOL:
case GL_FLOAT:
case GL_INT:
case GL_UNSIGNED_INT:
case GL_SAMPLER_2D:
case GL_SAMPLER_CUBE:
case GL_SAMPLER_2D_RECT_ARB:
case GL_SAMPLER_EXTERNAL_OES:
case GL_SAMPLER_3D_OES:
case GL_SAMPLER_2D_ARRAY:
case GL_SAMPLER_2D_SHADOW:
case GL_SAMPLER_CUBE_SHADOW:
case GL_SAMPLER_2D_ARRAY_SHADOW:
case GL_INT_SAMPLER_2D:
case GL_UNSIGNED_INT_SAMPLER_2D:
case GL_INT_SAMPLER_CUBE:
case GL_UNSIGNED_INT_SAMPLER_CUBE:
case GL_INT_SAMPLER_3D:
case GL_UNSIGNED_INT_SAMPLER_3D:
case GL_INT_SAMPLER_2D_ARRAY:
case GL_UNSIGNED_INT_SAMPLER_2D_ARRAY:
return 1;
case GL_BOOL_VEC2:
case GL_FLOAT_VEC2:
case GL_INT_VEC2:
case GL_UNSIGNED_INT_VEC2:
return 2;
case GL_INT_VEC3:
case GL_UNSIGNED_INT_VEC3:
case GL_FLOAT_VEC3:
case GL_BOOL_VEC3:
return 3;
case GL_BOOL_VEC4:
case GL_FLOAT_VEC4:
case GL_INT_VEC4:
case GL_UNSIGNED_INT_VEC4:
case GL_FLOAT_MAT2:
return 4;
case GL_FLOAT_MAT2x3:
case GL_FLOAT_MAT3x2:
return 6;
case GL_FLOAT_MAT2x4:
case GL_FLOAT_MAT4x2:
return 8;
case GL_FLOAT_MAT3:
return 9;
case GL_FLOAT_MAT3x4:
case GL_FLOAT_MAT4x3:
return 12;
case GL_FLOAT_MAT4:
return 16;
default:
UNREACHABLE(type);
}
return 0;
}
GLenum UniformComponentType(GLenum type)
{
switch(type)
{
case GL_BOOL:
case GL_BOOL_VEC2:
case GL_BOOL_VEC3:
case GL_BOOL_VEC4:
return GL_BOOL;
case GL_FLOAT:
case GL_FLOAT_VEC2:
case GL_FLOAT_VEC3:
case GL_FLOAT_VEC4:
case GL_FLOAT_MAT2:
case GL_FLOAT_MAT2x3:
case GL_FLOAT_MAT2x4:
case GL_FLOAT_MAT3:
case GL_FLOAT_MAT3x2:
case GL_FLOAT_MAT3x4:
case GL_FLOAT_MAT4:
case GL_FLOAT_MAT4x2:
case GL_FLOAT_MAT4x3:
return GL_FLOAT;
case GL_INT:
case GL_SAMPLER_2D:
case GL_SAMPLER_CUBE:
case GL_SAMPLER_2D_RECT_ARB:
case GL_SAMPLER_EXTERNAL_OES:
case GL_SAMPLER_3D_OES:
case GL_SAMPLER_2D_ARRAY:
case GL_SAMPLER_2D_SHADOW:
case GL_SAMPLER_CUBE_SHADOW:
case GL_SAMPLER_2D_ARRAY_SHADOW:
case GL_INT_SAMPLER_2D:
case GL_UNSIGNED_INT_SAMPLER_2D:
case GL_INT_SAMPLER_CUBE:
case GL_UNSIGNED_INT_SAMPLER_CUBE:
case GL_INT_SAMPLER_3D:
case GL_UNSIGNED_INT_SAMPLER_3D:
case GL_INT_SAMPLER_2D_ARRAY:
case GL_UNSIGNED_INT_SAMPLER_2D_ARRAY:
case GL_INT_VEC2:
case GL_INT_VEC3:
case GL_INT_VEC4:
return GL_INT;
case GL_UNSIGNED_INT:
case GL_UNSIGNED_INT_VEC2:
case GL_UNSIGNED_INT_VEC3:
case GL_UNSIGNED_INT_VEC4:
return GL_UNSIGNED_INT;
default:
UNREACHABLE(type);
}
return GL_NONE;
}
size_t UniformTypeSize(GLenum type)
{
switch(type)
{
case GL_BOOL: return sizeof(GLboolean);
case GL_FLOAT: return sizeof(GLfloat);
case GL_INT: return sizeof(GLint);
case GL_UNSIGNED_INT: return sizeof(GLuint);
}
return UniformTypeSize(UniformComponentType(type)) * UniformComponentCount(type);
}
bool IsSamplerUniform(GLenum type)
{
switch(type)
{
case GL_SAMPLER_2D:
case GL_SAMPLER_CUBE:
case GL_SAMPLER_2D_RECT_ARB:
case GL_SAMPLER_EXTERNAL_OES:
case GL_SAMPLER_3D_OES:
case GL_SAMPLER_2D_ARRAY:
case GL_SAMPLER_2D_SHADOW:
case GL_SAMPLER_CUBE_SHADOW:
case GL_SAMPLER_2D_ARRAY_SHADOW:
case GL_INT_SAMPLER_2D:
case GL_UNSIGNED_INT_SAMPLER_2D:
case GL_INT_SAMPLER_CUBE:
case GL_UNSIGNED_INT_SAMPLER_CUBE:
case GL_INT_SAMPLER_3D:
case GL_UNSIGNED_INT_SAMPLER_3D:
case GL_INT_SAMPLER_2D_ARRAY:
case GL_UNSIGNED_INT_SAMPLER_2D_ARRAY:
return true;
default:
return false;
}
}
int VariableRowCount(GLenum type)
{
switch(type)
{
case GL_NONE:
return 0;
case GL_BOOL:
case GL_FLOAT:
case GL_INT:
case GL_UNSIGNED_INT:
case GL_BOOL_VEC2:
case GL_FLOAT_VEC2:
case GL_INT_VEC2:
case GL_UNSIGNED_INT_VEC2:
case GL_INT_VEC3:
case GL_UNSIGNED_INT_VEC3:
case GL_FLOAT_VEC3:
case GL_BOOL_VEC3:
case GL_BOOL_VEC4:
case GL_FLOAT_VEC4:
case GL_INT_VEC4:
case GL_UNSIGNED_INT_VEC4:
case GL_SAMPLER_2D:
case GL_SAMPLER_CUBE:
case GL_SAMPLER_2D_RECT_ARB:
case GL_SAMPLER_EXTERNAL_OES:
case GL_SAMPLER_3D_OES:
case GL_SAMPLER_2D_ARRAY:
case GL_SAMPLER_2D_SHADOW:
case GL_SAMPLER_CUBE_SHADOW:
case GL_SAMPLER_2D_ARRAY_SHADOW:
case GL_INT_SAMPLER_2D:
case GL_UNSIGNED_INT_SAMPLER_2D:
case GL_INT_SAMPLER_CUBE:
case GL_UNSIGNED_INT_SAMPLER_CUBE:
case GL_INT_SAMPLER_3D:
case GL_UNSIGNED_INT_SAMPLER_3D:
case GL_INT_SAMPLER_2D_ARRAY:
case GL_UNSIGNED_INT_SAMPLER_2D_ARRAY:
return 1;
case GL_FLOAT_MAT2:
case GL_FLOAT_MAT3x2:
case GL_FLOAT_MAT4x2:
return 2;
case GL_FLOAT_MAT3:
case GL_FLOAT_MAT2x3:
case GL_FLOAT_MAT4x3:
return 3;
case GL_FLOAT_MAT4:
case GL_FLOAT_MAT2x4:
case GL_FLOAT_MAT3x4:
return 4;
default:
UNREACHABLE(type);
}
return 0;
}
int VariableColumnCount(GLenum type)
{
switch(type)
{
case GL_NONE:
return 0;
case GL_BOOL:
case GL_FLOAT:
case GL_INT:
case GL_UNSIGNED_INT:
return 1;
case GL_BOOL_VEC2:
case GL_FLOAT_VEC2:
case GL_INT_VEC2:
case GL_UNSIGNED_INT_VEC2:
case GL_FLOAT_MAT2:
case GL_FLOAT_MAT2x3:
case GL_FLOAT_MAT2x4:
return 2;
case GL_INT_VEC3:
case GL_UNSIGNED_INT_VEC3:
case GL_FLOAT_VEC3:
case GL_BOOL_VEC3:
case GL_FLOAT_MAT3:
case GL_FLOAT_MAT3x2:
case GL_FLOAT_MAT3x4:
return 3;
case GL_BOOL_VEC4:
case GL_FLOAT_VEC4:
case GL_INT_VEC4:
case GL_UNSIGNED_INT_VEC4:
case GL_FLOAT_MAT4:
case GL_FLOAT_MAT4x2:
case GL_FLOAT_MAT4x3:
return 4;
default:
UNREACHABLE(type);
}
return 0;
}
int VariableRegisterCount(GLenum type)
{
// Number of registers used is the number of columns for matrices or 1 for scalars and vectors
return (VariableRowCount(type) > 1) ? VariableColumnCount(type) : 1;
}
int VariableRegisterSize(GLenum type)
{
// Number of components per register is the number of rows for matrices or columns for scalars and vectors
int nbRows = VariableRowCount(type);
return (nbRows > 1) ? nbRows : VariableColumnCount(type);
}
int AllocateFirstFreeBits(unsigned int *bits, unsigned int allocationSize, unsigned int bitsSize)
{
ASSERT(allocationSize <= bitsSize);
unsigned int mask = std::numeric_limits<unsigned int>::max() >> (std::numeric_limits<unsigned int>::digits - allocationSize);
for(unsigned int i = 0; i < bitsSize - allocationSize + 1; i++)
{
if((*bits & mask) == 0)
{
*bits |= mask;
return i;
}
mask <<= 1;
}
return -1;
}
bool IsCompressed(GLint internalformat, GLint clientVersion)
{
switch(internalformat)
{
case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
case GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE:
case GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE:
case GL_ETC1_RGB8_OES:
return true;
case GL_COMPRESSED_R11_EAC:
case GL_COMPRESSED_SIGNED_R11_EAC:
case GL_COMPRESSED_RG11_EAC:
case GL_COMPRESSED_SIGNED_RG11_EAC:
case GL_COMPRESSED_RGB8_ETC2:
case GL_COMPRESSED_SRGB8_ETC2:
case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
case GL_COMPRESSED_RGBA8_ETC2_EAC:
case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
return (clientVersion >= 3);
case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
return ASTC_SUPPORT && (clientVersion >= 3);
default:
return false;
}
}
bool IsSizedInternalFormat(GLint internalformat)
{
switch(internalformat)
{
case GL_ALPHA8_EXT:
case GL_LUMINANCE8_EXT:
case GL_LUMINANCE8_ALPHA8_EXT:
case GL_ALPHA32F_EXT:
case GL_LUMINANCE32F_EXT:
case GL_LUMINANCE_ALPHA32F_EXT:
case GL_ALPHA16F_EXT:
case GL_LUMINANCE16F_EXT:
case GL_LUMINANCE_ALPHA16F_EXT:
case GL_R8:
case GL_R8UI:
case GL_R8I:
case GL_R16UI:
case GL_R16I:
case GL_R32UI:
case GL_R32I:
case GL_RG8:
case GL_RG8UI:
case GL_RG8I:
case GL_RG16UI:
case GL_RG16I:
case GL_RG32UI:
case GL_RG32I:
case GL_SRGB8_ALPHA8:
case GL_RGB8UI:
case GL_RGB8I:
case GL_RGB16UI:
case GL_RGB16I:
case GL_RGB32UI:
case GL_RGB32I:
case GL_RG8_SNORM:
case GL_R8_SNORM:
case GL_RGB10_A2:
case GL_RGBA8UI:
case GL_RGBA8I:
case GL_RGB10_A2UI:
case GL_RGBA16UI:
case GL_RGBA16I:
case GL_RGBA32I:
case GL_RGBA32UI:
case GL_RGBA4:
case GL_RGB5_A1:
case GL_RGB565:
case GL_RGB8:
case GL_RGBA8:
case GL_BGRA8_EXT: // GL_APPLE_texture_format_BGRA8888
case GL_R16F:
case GL_RG16F:
case GL_R11F_G11F_B10F:
case GL_RGB16F:
case GL_RGBA16F:
case GL_R32F:
case GL_RG32F:
case GL_RGB32F:
case GL_RGBA32F:
case GL_DEPTH_COMPONENT24:
case GL_DEPTH_COMPONENT32_OES:
case GL_DEPTH_COMPONENT32F:
case GL_DEPTH32F_STENCIL8:
case GL_DEPTH_COMPONENT16:
case GL_STENCIL_INDEX8:
case GL_DEPTH24_STENCIL8_OES:
case GL_RGBA8_SNORM:
case GL_SRGB8:
case GL_RGB8_SNORM:
case GL_RGB9_E5:
return true;
default:
return false;
}
}
GLenum ValidateSubImageParams(bool compressed, bool copy, GLenum target, GLint level, GLint xoffset, GLint yoffset,
GLsizei width, GLsizei height, GLenum format, GLenum type, Texture *texture, GLint clientVersion)
{
if(!texture)
{
return GL_INVALID_OPERATION;
}
GLenum sizedInternalFormat = texture->getFormat(target, level);
if(compressed)
{
if(format != sizedInternalFormat)
{
return GL_INVALID_OPERATION;
}
}
else if(!copy) // CopyTexSubImage doesn't have format/type parameters.
{
GLenum validationError = ValidateTextureFormatType(format, type, sizedInternalFormat, target, clientVersion);
if(validationError != GL_NO_ERROR)
{
return validationError;
}
}
if(compressed)
{
if((width % 4 != 0 && width != texture->getWidth(target, 0)) ||
(height % 4 != 0 && height != texture->getHeight(target, 0)))
{
return GL_INVALID_OPERATION;
}
}
if(xoffset + width > texture->getWidth(target, level) ||
yoffset + height > texture->getHeight(target, level))
{
return GL_INVALID_VALUE;
}
return GL_NO_ERROR;
}
GLenum ValidateSubImageParams(bool compressed, bool copy, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset,
GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, Texture *texture, GLint clientVersion)
{
if(!texture)
{
return GL_INVALID_OPERATION;
}
if(compressed != texture->isCompressed(target, level))
{
return GL_INVALID_OPERATION;
}
if(!copy)
{
GLenum sizedInternalFormat = texture->getFormat(target, level);
GLenum validationError = ValidateTextureFormatType(format, type, sizedInternalFormat, target, clientVersion);
if(validationError != GL_NO_ERROR)
{
return validationError;
}
}
if(compressed)
{
if((width % 4 != 0 && width != texture->getWidth(target, 0)) ||
(height % 4 != 0 && height != texture->getHeight(target, 0)) ||
(depth % 4 != 0 && depth != texture->getDepth(target, 0)))
{
return GL_INVALID_OPERATION;
}
}
if(xoffset + width > texture->getWidth(target, level) ||
yoffset + height > texture->getHeight(target, level) ||
zoffset + depth > texture->getDepth(target, level))
{
return GL_INVALID_VALUE;
}
return GL_NO_ERROR;
}
bool ValidateCopyFormats(GLenum textureFormat, GLenum colorbufferFormat)
{
ASSERT(!gl::IsUnsizedInternalFormat(textureFormat));
ASSERT(!gl::IsUnsizedInternalFormat(colorbufferFormat));
if(GetColorComponentType(textureFormat) == GL_NONE)
{
return error(GL_INVALID_ENUM, false);
}
if(GetColorComponentType(colorbufferFormat) != GetColorComponentType(textureFormat))
{
return error(GL_INVALID_OPERATION, false);
}
if(GetColorEncoding(colorbufferFormat) != GetColorEncoding(textureFormat))
{
return error(GL_INVALID_OPERATION, false);
}
GLenum baseTexureFormat = gl::GetBaseInternalFormat(textureFormat);
GLenum baseColorbufferFormat = gl::GetBaseInternalFormat(colorbufferFormat);
// [OpenGL ES 2.0.24] table 3.9
// [OpenGL ES 3.0.5] table 3.16
switch(baseTexureFormat)
{
case GL_ALPHA:
if(baseColorbufferFormat != GL_ALPHA &&
baseColorbufferFormat != GL_RGBA &&
baseColorbufferFormat != GL_BGRA_EXT) // GL_EXT_texture_format_BGRA8888 / GL_APPLE_texture_format_BGRA8888
{
return error(GL_INVALID_OPERATION, false);
}
break;
case GL_LUMINANCE_ALPHA:
case GL_RGBA:
if(baseColorbufferFormat != GL_RGBA &&
baseColorbufferFormat != GL_BGRA_EXT) // GL_EXT_texture_format_BGRA8888 / GL_APPLE_texture_format_BGRA8888
{
return error(GL_INVALID_OPERATION, false);
}
break;
case GL_LUMINANCE:
case GL_RED:
if(baseColorbufferFormat != GL_RED &&
baseColorbufferFormat != GL_RG &&
baseColorbufferFormat != GL_RGB &&
baseColorbufferFormat != GL_RGBA &&
baseColorbufferFormat != GL_BGRA_EXT) // GL_EXT_texture_format_BGRA8888 / GL_APPLE_texture_format_BGRA8888
{
return error(GL_INVALID_OPERATION, false);
}
break;
case GL_RG:
if(baseColorbufferFormat != GL_RG &&
baseColorbufferFormat != GL_RGB &&
baseColorbufferFormat != GL_RGBA &&
baseColorbufferFormat != GL_BGRA_EXT) // GL_EXT_texture_format_BGRA8888 / GL_APPLE_texture_format_BGRA8888
{
return error(GL_INVALID_OPERATION, false);
}
break;
case GL_RGB:
if(baseColorbufferFormat != GL_RGB &&
baseColorbufferFormat != GL_RGBA &&
baseColorbufferFormat != GL_BGRA_EXT) // GL_EXT_texture_format_BGRA8888 / GL_APPLE_texture_format_BGRA8888
{
return error(GL_INVALID_OPERATION, false);
}
break;
case GL_DEPTH_COMPONENT:
case GL_DEPTH_STENCIL_OES:
return error(GL_INVALID_OPERATION, false);
case GL_BGRA_EXT: // GL_EXT_texture_format_BGRA8888 nor GL_APPLE_texture_format_BGRA8888 mention the format to be accepted by glCopyTexImage2D.
default:
return error(GL_INVALID_ENUM, false);
}
return true;
}
bool IsValidReadPixelsFormatType(const Framebuffer *framebuffer, GLenum format, GLenum type, GLint clientVersion)
{
// GL_NV_read_depth
if(format == GL_DEPTH_COMPONENT)
{
Renderbuffer *depthbuffer = framebuffer->getDepthbuffer();
if(!depthbuffer)
{
return false;
}
switch(type)
{
case GL_UNSIGNED_SHORT:
case GL_FLOAT:
return true;
default:
UNIMPLEMENTED();
return false;
}
}
Renderbuffer *colorbuffer = framebuffer->getReadColorbuffer();
if(!colorbuffer)
{
return false;
}
GLint internalformat = colorbuffer->getFormat();
if(IsNormalizedInteger(internalformat))
{
// Combination always supported by normalized fixed-point rendering surfaces.
if(format == GL_RGBA && type == GL_UNSIGNED_BYTE)
{
return true;
}
// GL_EXT_read_format_bgra combinations.
if(format == GL_BGRA_EXT)
{
if(type == GL_UNSIGNED_BYTE ||
type == GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT ||
type == GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT)
{
return true;
}
}
}
else if(IsFloatFormat(internalformat))
{
// Combination always supported by floating-point rendering surfaces.
// Supported in OpenGL ES 2.0 due to GL_EXT_color_buffer_half_float.
if(format == GL_RGBA && type == GL_FLOAT)
{
return true;
}
}
else if(IsSignedNonNormalizedInteger(internalformat))
{
ASSERT(clientVersion >= 3);
if(format == GL_RGBA_INTEGER && type == GL_INT)
{
return true;
}
}
else if(IsUnsignedNonNormalizedInteger(internalformat))
{
ASSERT(clientVersion >= 3);
if(format == GL_RGBA_INTEGER && type == GL_UNSIGNED_INT)
{
return true;
}
}
else UNREACHABLE(internalformat);
// GL_IMPLEMENTATION_COLOR_READ_FORMAT / GL_IMPLEMENTATION_COLOR_READ_TYPE
GLenum implementationReadFormat = GL_NONE;
GLenum implementationReadType = GL_NONE;
switch(format)
{
default:
implementationReadFormat = framebuffer->getImplementationColorReadFormat();
implementationReadType = framebuffer->getImplementationColorReadType();
break;
case GL_DEPTH_COMPONENT:
implementationReadFormat = framebuffer->getDepthReadFormat();
implementationReadType = framebuffer->getDepthReadType();
break;
}
if(format == implementationReadFormat && type == implementationReadType)
{
return true;
}
// Additional third combination accepted by OpenGL ES 3.0.
if(internalformat == GL_RGB10_A2)
{
ASSERT(clientVersion >= 3);
if(format == GL_RGBA && type == GL_UNSIGNED_INT_2_10_10_10_REV)
{
return true;
}
}
return false;
}
bool IsDepthTexture(GLenum format)
{
return format == GL_DEPTH_COMPONENT ||
format == GL_DEPTH_STENCIL_OES ||
format == GL_DEPTH_COMPONENT16 ||
format == GL_DEPTH_COMPONENT24 ||
format == GL_DEPTH_COMPONENT32_OES ||
format == GL_DEPTH_COMPONENT32F ||
format == GL_DEPTH24_STENCIL8 ||
format == GL_DEPTH32F_STENCIL8;
}
bool IsStencilTexture(GLenum format)
{
return format == GL_STENCIL_INDEX_OES ||
format == GL_DEPTH_STENCIL_OES ||
format == GL_DEPTH24_STENCIL8 ||
format == GL_DEPTH32F_STENCIL8;
}
bool IsCubemapTextureTarget(GLenum target)
{
return (target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X && target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z);
}
int CubeFaceIndex(GLenum cubeFace)
{
switch(cubeFace)
{
case GL_TEXTURE_CUBE_MAP:
case GL_TEXTURE_CUBE_MAP_POSITIVE_X: return 0;
case GL_TEXTURE_CUBE_MAP_NEGATIVE_X: return 1;
case GL_TEXTURE_CUBE_MAP_POSITIVE_Y: return 2;
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y: return 3;
case GL_TEXTURE_CUBE_MAP_POSITIVE_Z: return 4;
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z: return 5;
default: UNREACHABLE(cubeFace); return 0;
}
}
bool IsTextureTarget(GLenum target)
{
return target == GL_TEXTURE_2D || IsCubemapTextureTarget(target) || target == GL_TEXTURE_3D || target == GL_TEXTURE_2D_ARRAY || target == GL_TEXTURE_RECTANGLE_ARB;
}
GLenum ValidateTextureFormatType(GLenum format, GLenum type, GLint internalformat, GLenum target, GLint clientVersion)
{
switch(type)
{
case GL_UNSIGNED_BYTE:
case GL_UNSIGNED_SHORT_4_4_4_4:
case GL_UNSIGNED_SHORT_5_5_5_1:
case GL_UNSIGNED_SHORT_5_6_5:
case GL_FLOAT: // GL_OES_texture_float
case GL_HALF_FLOAT_OES: // GL_OES_texture_half_float
case GL_HALF_FLOAT:
case GL_UNSIGNED_INT_24_8: // GL_OES_packed_depth_stencil (GL_UNSIGNED_INT_24_8_EXT)
case GL_UNSIGNED_SHORT: // GL_OES_depth_texture
case GL_UNSIGNED_INT: // GL_OES_depth_texture
break;
case GL_BYTE:
case GL_SHORT:
case GL_INT:
case GL_UNSIGNED_INT_2_10_10_10_REV:
case GL_UNSIGNED_INT_10F_11F_11F_REV:
case GL_UNSIGNED_INT_5_9_9_9_REV:
case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
if(clientVersion < 3)
{
return GL_INVALID_ENUM;
}
break;
default:
return GL_INVALID_ENUM;
}
switch(format)
{
case GL_ALPHA:
case GL_RGB:
case GL_RGBA:
case GL_LUMINANCE:
case GL_LUMINANCE_ALPHA:
case GL_BGRA_EXT: // GL_EXT_texture_format_BGRA8888
case GL_RED_EXT: // GL_EXT_texture_rg
case GL_RG_EXT: // GL_EXT_texture_rg
break;
case GL_DEPTH_STENCIL: // GL_OES_packed_depth_stencil (GL_DEPTH_STENCIL_OES)
case GL_DEPTH_COMPONENT: // GL_OES_depth_texture
switch(target)
{
case GL_TEXTURE_2D:
case GL_TEXTURE_2D_ARRAY:
case GL_TEXTURE_CUBE_MAP_POSITIVE_X: // GL_OES_depth_texture_cube_map
case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
break;
default:
return GL_INVALID_OPERATION;
}
break;
case GL_RED_INTEGER:
case GL_RG_INTEGER:
case GL_RGB_INTEGER:
case GL_RGBA_INTEGER:
if(clientVersion < 3)
{
return GL_INVALID_ENUM;
}
break;
default:
return GL_INVALID_ENUM;
}
if((GLenum)internalformat != format)
{
if(gl::IsUnsizedInternalFormat(internalformat))
{
return GL_INVALID_OPERATION;
}
if(!IsSizedInternalFormat(internalformat))
{
return GL_INVALID_VALUE;
}
}
if((GLenum)internalformat == format)
{
// Validate format, type, and unsized internalformat combinations [OpenGL ES 3.0 Table 3.3]
switch(format)
{
case GL_RGBA:
switch(type)
{
case GL_UNSIGNED_BYTE:
case GL_UNSIGNED_SHORT_4_4_4_4:
case GL_UNSIGNED_SHORT_5_5_5_1:
case GL_FLOAT: // GL_OES_texture_float
case GL_HALF_FLOAT_OES: // GL_OES_texture_half_float
break;
default:
return GL_INVALID_OPERATION;
}
break;
case GL_RGB:
switch(type)
{
case GL_UNSIGNED_BYTE:
case GL_UNSIGNED_SHORT_5_6_5:
case GL_FLOAT: // GL_OES_texture_float
case GL_HALF_FLOAT_OES: // GL_OES_texture_half_float
break;
default:
return GL_INVALID_OPERATION;
}
break;
case GL_LUMINANCE_ALPHA:
case GL_LUMINANCE:
case GL_ALPHA:
switch(type)
{
case GL_UNSIGNED_BYTE:
case GL_FLOAT: // GL_OES_texture_float
case GL_HALF_FLOAT_OES: // GL_OES_texture_half_float
break;
default:
return GL_INVALID_OPERATION;
}
break;
case GL_DEPTH_COMPONENT:
switch(type)
{
case GL_UNSIGNED_SHORT: // GL_OES_depth_texture
case GL_UNSIGNED_INT: // GL_OES_depth_texture
break;
default:
return GL_INVALID_OPERATION;
}
break;
case GL_DEPTH_STENCIL_OES:
switch(type)
{
case GL_UNSIGNED_INT_24_8_OES: // GL_OES_packed_depth_stencil
break;
default:
return GL_INVALID_OPERATION;
}
break;
case GL_RED_EXT:
case GL_RG_EXT:
switch(type)
{
case GL_UNSIGNED_BYTE: // GL_EXT_texture_rg
case GL_FLOAT: // GL_EXT_texture_rg + GL_OES_texture_float
case GL_HALF_FLOAT_OES: // GL_EXT_texture_rg + GL_OES_texture_half_float
break;
default:
return GL_INVALID_OPERATION;
}
break;
case GL_BGRA_EXT:
if(type != GL_UNSIGNED_BYTE) // GL_APPLE_texture_format_BGRA8888 / GL_EXT_texture_format_BGRA8888
{
return GL_INVALID_OPERATION;
}
break;
default:
UNREACHABLE(format);
return GL_INVALID_ENUM;
}
return GL_NO_ERROR;
}
// Validate format, type, and sized internalformat combinations [OpenGL ES 3.0 Table 3.2]
bool validSizedInternalformat = false;
#define VALIDATE_INTERNALFORMAT(...) { GLint validInternalformats[] = {__VA_ARGS__}; for(GLint v : validInternalformats) {if(internalformat == v) validSizedInternalformat = true;} } break;
switch(format)
{
case GL_RGBA:
switch(type)
{
case GL_UNSIGNED_BYTE: VALIDATE_INTERNALFORMAT(GL_RGBA8, GL_RGB5_A1, GL_RGBA4, GL_SRGB8_ALPHA8)
case GL_BYTE: VALIDATE_INTERNALFORMAT(GL_RGBA8_SNORM)
case GL_UNSIGNED_SHORT_4_4_4_4: VALIDATE_INTERNALFORMAT(GL_RGBA4)
case GL_UNSIGNED_SHORT_5_5_5_1: VALIDATE_INTERNALFORMAT(GL_RGB5_A1)
case GL_UNSIGNED_INT_2_10_10_10_REV: VALIDATE_INTERNALFORMAT(GL_RGB10_A2, GL_RGB5_A1)
case GL_HALF_FLOAT_OES:
case GL_HALF_FLOAT: VALIDATE_INTERNALFORMAT(GL_RGBA16F)
case GL_FLOAT: VALIDATE_INTERNALFORMAT(GL_RGBA32F, GL_RGBA16F)
default: return GL_INVALID_OPERATION;
}
break;
case GL_RGBA_INTEGER:
switch(type)
{
case GL_UNSIGNED_BYTE: VALIDATE_INTERNALFORMAT(GL_RGBA8UI)
case GL_BYTE: VALIDATE_INTERNALFORMAT(GL_RGBA8I)
case GL_UNSIGNED_SHORT: VALIDATE_INTERNALFORMAT(GL_RGBA16UI)
case GL_SHORT: VALIDATE_INTERNALFORMAT(GL_RGBA16I)
case GL_UNSIGNED_INT: VALIDATE_INTERNALFORMAT(GL_RGBA32UI)
case GL_INT: VALIDATE_INTERNALFORMAT(GL_RGBA32I)
case GL_UNSIGNED_INT_2_10_10_10_REV: VALIDATE_INTERNALFORMAT(GL_RGB10_A2UI)
default: return GL_INVALID_OPERATION;
}
break;
case GL_RGB:
switch(type)
{
case GL_UNSIGNED_BYTE: VALIDATE_INTERNALFORMAT(GL_RGB8, GL_RGB565, GL_SRGB8)
case GL_BYTE: VALIDATE_INTERNALFORMAT(GL_RGB8_SNORM)
case GL_UNSIGNED_SHORT_5_6_5: VALIDATE_INTERNALFORMAT(GL_RGB565)
case GL_UNSIGNED_INT_10F_11F_11F_REV: VALIDATE_INTERNALFORMAT(GL_R11F_G11F_B10F)
case GL_UNSIGNED_INT_5_9_9_9_REV: VALIDATE_INTERNALFORMAT(GL_RGB9_E5)
case GL_HALF_FLOAT_OES:
case GL_HALF_FLOAT: VALIDATE_INTERNALFORMAT(GL_RGB16F, GL_R11F_G11F_B10F, GL_RGB9_E5)
case GL_FLOAT: VALIDATE_INTERNALFORMAT(GL_RGB32F, GL_RGB16F, GL_R11F_G11F_B10F, GL_RGB9_E5)
default: return GL_INVALID_OPERATION;
}
break;
case GL_RGB_INTEGER:
switch(type)
{
case GL_UNSIGNED_BYTE: VALIDATE_INTERNALFORMAT(GL_RGB8UI)
case GL_BYTE: VALIDATE_INTERNALFORMAT(GL_RGB8I)
case GL_UNSIGNED_SHORT: VALIDATE_INTERNALFORMAT(GL_RGB16UI)
case GL_SHORT: VALIDATE_INTERNALFORMAT(GL_RGB16I)
case GL_UNSIGNED_INT: VALIDATE_INTERNALFORMAT(GL_RGB32UI)
case GL_INT: VALIDATE_INTERNALFORMAT(GL_RGB32I)
default: return GL_INVALID_OPERATION;
}
break;
case GL_RG:
switch(type)
{
case GL_UNSIGNED_BYTE: VALIDATE_INTERNALFORMAT(GL_RG8)
case GL_BYTE: VALIDATE_INTERNALFORMAT(GL_RG8_SNORM)
case GL_HALF_FLOAT_OES:
case GL_HALF_FLOAT: VALIDATE_INTERNALFORMAT(GL_RG16F)
case GL_FLOAT: VALIDATE_INTERNALFORMAT(GL_RG32F, GL_RG16F)
default: return GL_INVALID_OPERATION;
}
break;
case GL_RG_INTEGER:
switch(type)
{
case GL_UNSIGNED_BYTE: VALIDATE_INTERNALFORMAT(GL_RG8UI)
case GL_BYTE: VALIDATE_INTERNALFORMAT(GL_RG8I)
case GL_UNSIGNED_SHORT: VALIDATE_INTERNALFORMAT(GL_RG16UI)
case GL_SHORT: VALIDATE_INTERNALFORMAT(GL_RG16I)
case GL_UNSIGNED_INT: VALIDATE_INTERNALFORMAT(GL_RG32UI)
case GL_INT: VALIDATE_INTERNALFORMAT(GL_RG32I)
default: return GL_INVALID_OPERATION;
}
break;
case GL_RED:
switch(type)
{
case GL_UNSIGNED_BYTE: VALIDATE_INTERNALFORMAT(GL_R8)
case GL_BYTE: VALIDATE_INTERNALFORMAT(GL_R8_SNORM)
case GL_HALF_FLOAT_OES:
case GL_HALF_FLOAT: VALIDATE_INTERNALFORMAT(GL_R16F)
case GL_FLOAT: VALIDATE_INTERNALFORMAT(GL_R32F, GL_R16F)
default: return GL_INVALID_OPERATION;
}
break;
case GL_RED_INTEGER:
switch(type)
{
case GL_UNSIGNED_BYTE: VALIDATE_INTERNALFORMAT(GL_R8UI)
case GL_BYTE: VALIDATE_INTERNALFORMAT(GL_R8I)
case GL_UNSIGNED_SHORT: VALIDATE_INTERNALFORMAT(GL_R16UI)
case GL_SHORT: VALIDATE_INTERNALFORMAT(GL_R16I)
case GL_UNSIGNED_INT: VALIDATE_INTERNALFORMAT(GL_R32UI)
case GL_INT: VALIDATE_INTERNALFORMAT(GL_R32I)
default: return GL_INVALID_OPERATION;
}
break;
case GL_DEPTH_COMPONENT:
switch(type)
{
case GL_UNSIGNED_SHORT: VALIDATE_INTERNALFORMAT(GL_DEPTH_COMPONENT16)
case GL_UNSIGNED_INT: VALIDATE_INTERNALFORMAT(GL_DEPTH_COMPONENT24, GL_DEPTH_COMPONENT16)
case GL_FLOAT: VALIDATE_INTERNALFORMAT(GL_DEPTH_COMPONENT32F)
default: return GL_INVALID_OPERATION;
}
break;
case GL_DEPTH_STENCIL:
switch(type)
{
case GL_UNSIGNED_INT_24_8: VALIDATE_INTERNALFORMAT(GL_DEPTH24_STENCIL8)
case GL_FLOAT_32_UNSIGNED_INT_24_8_REV: VALIDATE_INTERNALFORMAT(GL_DEPTH32F_STENCIL8)
default: return GL_INVALID_OPERATION;
}
break;
case GL_LUMINANCE_ALPHA:
switch(type)
{
case GL_UNSIGNED_BYTE: VALIDATE_INTERNALFORMAT(GL_LUMINANCE8_ALPHA8_EXT)
case GL_HALF_FLOAT_OES:
case GL_HALF_FLOAT: VALIDATE_INTERNALFORMAT(GL_LUMINANCE_ALPHA16F_EXT)
case GL_FLOAT: VALIDATE_INTERNALFORMAT(GL_LUMINANCE_ALPHA32F_EXT, GL_LUMINANCE_ALPHA16F_EXT)
default:
return GL_INVALID_OPERATION;
}
break;
case GL_LUMINANCE:
switch(type)
{
case GL_UNSIGNED_BYTE: VALIDATE_INTERNALFORMAT(GL_LUMINANCE8_EXT)
case GL_HALF_FLOAT_OES:
case GL_HALF_FLOAT: VALIDATE_INTERNALFORMAT(GL_LUMINANCE16F_EXT)
case GL_FLOAT: VALIDATE_INTERNALFORMAT(GL_LUMINANCE32F_EXT, GL_LUMINANCE16F_EXT)
default:
return GL_INVALID_OPERATION;
}
break;
case GL_ALPHA:
switch(type)
{
case GL_UNSIGNED_BYTE: VALIDATE_INTERNALFORMAT(GL_ALPHA8_EXT)
case GL_HALF_FLOAT_OES:
case GL_HALF_FLOAT: VALIDATE_INTERNALFORMAT(GL_ALPHA16F_EXT)
case GL_FLOAT: VALIDATE_INTERNALFORMAT(GL_ALPHA32F_EXT, GL_ALPHA16F_EXT)
default:
return GL_INVALID_OPERATION;
}
break;
case GL_BGRA_EXT: // GL_APPLE_texture_format_BGRA8888
switch(type)
{
case GL_UNSIGNED_BYTE: VALIDATE_INTERNALFORMAT(GL_BGRA8_EXT)
default: return GL_INVALID_OPERATION;
}
break;
default:
UNREACHABLE(format);
return GL_INVALID_ENUM;
}
#undef VALIDATE_INTERNALFORMAT
if(!validSizedInternalformat)
{
return GL_INVALID_OPERATION;
}
return GL_NO_ERROR;
}
size_t GetTypeSize(GLenum type)
{
switch(type)
{
case GL_BYTE:
case GL_UNSIGNED_BYTE:
return 1;
case GL_UNSIGNED_SHORT_4_4_4_4:
case GL_UNSIGNED_SHORT_5_5_5_1:
case GL_UNSIGNED_SHORT_5_6_5:
case GL_UNSIGNED_SHORT:
case GL_SHORT:
case GL_HALF_FLOAT:
case GL_HALF_FLOAT_OES:
return 2;
case GL_FLOAT:
case GL_UNSIGNED_INT_24_8:
case GL_UNSIGNED_INT:
case GL_INT:
case GL_UNSIGNED_INT_2_10_10_10_REV:
case GL_UNSIGNED_INT_10F_11F_11F_REV:
case GL_UNSIGNED_INT_5_9_9_9_REV:
case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
return 4;
default:
UNREACHABLE(type);
break;
}
return 1;
}
bool IsColorRenderable(GLint internalformat, GLint clientVersion)
{
if(IsCompressed(internalformat, clientVersion))
{
return false;
}
switch(internalformat)
{
case GL_RGBA4:
case GL_RGB5_A1:
case GL_RGB565:
case GL_R8:
case GL_RG8:
case GL_RGB8:
case GL_RGBA8:
case GL_R16F:
case GL_RG16F:
case GL_RGB16F:
case GL_RGBA16F:
case GL_R32F:
case GL_RG32F:
case GL_RGB32F:
case GL_RGBA32F:
case GL_BGRA8_EXT: // GL_EXT_texture_format_BGRA8888
return true;
case GL_R8UI:
case GL_R8I:
case GL_R16UI:
case GL_R16I:
case GL_R32UI:
case GL_R32I:
case GL_RG8UI:
case GL_RG8I:
case GL_RG16UI:
case GL_RG16I:
case GL_RG32UI:
case GL_RG32I:
case GL_SRGB8_ALPHA8:
case GL_RGB10_A2:
case GL_RGBA8UI:
case GL_RGBA8I:
case GL_RGB10_A2UI:
case GL_RGBA16UI:
case GL_RGBA16I:
case GL_RGBA32I:
case GL_RGBA32UI:
case GL_R11F_G11F_B10F:
return clientVersion >= 3;
case GL_R8_SNORM:
case GL_RG8_SNORM:
case GL_RGB8_SNORM:
case GL_RGBA8_SNORM:
case GL_ALPHA8_EXT:
case GL_LUMINANCE8_EXT:
case GL_LUMINANCE8_ALPHA8_EXT:
case GL_ALPHA32F_EXT:
case GL_LUMINANCE32F_EXT:
case GL_LUMINANCE_ALPHA32F_EXT:
case GL_ALPHA16F_EXT:
case GL_LUMINANCE16F_EXT:
case GL_LUMINANCE_ALPHA16F_EXT:
case GL_DEPTH_COMPONENT24:
case GL_DEPTH_COMPONENT32_OES:
case GL_DEPTH_COMPONENT32F:
case GL_DEPTH32F_STENCIL8:
case GL_DEPTH_COMPONENT16:
case GL_STENCIL_INDEX8:
case GL_DEPTH24_STENCIL8_OES:
return false;
default:
UNIMPLEMENTED();
}
return false;
}
bool IsDepthRenderable(GLint internalformat, GLint clientVersion)
{
if(IsCompressed(internalformat, clientVersion))
{
return false;
}
switch(internalformat)
{
case GL_DEPTH_COMPONENT24:
case GL_DEPTH_COMPONENT16:
case GL_DEPTH24_STENCIL8_OES: // GL_OES_packed_depth_stencil
case GL_DEPTH_COMPONENT32_OES: // GL_OES_depth32
return true;
case GL_DEPTH32F_STENCIL8:
case GL_DEPTH_COMPONENT32F:
return clientVersion >= 3;
case GL_STENCIL_INDEX8:
case GL_R8:
case GL_R8UI:
case GL_R8I:
case GL_R16UI:
case GL_R16I:
case GL_R32UI:
case GL_R32I:
case GL_RG8:
case GL_RG8UI:
case GL_RG8I:
case GL_RG16UI:
case GL_RG16I:
case GL_RG32UI:
case GL_RG32I:
case GL_SRGB8_ALPHA8:
case GL_RGB10_A2:
case GL_RGBA8UI:
case GL_RGBA8I:
case GL_RGB10_A2UI:
case GL_RGBA16UI:
case GL_RGBA16I:
case GL_RGBA32I:
case GL_RGBA32UI:
case GL_RGBA4:
case GL_RGB5_A1:
case GL_RGB565:
case GL_RGB8:
case GL_RGBA8:
case GL_RED:
case GL_RG:
case GL_RGB:
case GL_RGBA:
case GL_R16F:
case GL_RG16F:
case GL_R11F_G11F_B10F:
case GL_RGB16F:
case GL_RGBA16F:
case GL_R32F:
case GL_RG32F:
case GL_RGB32F:
case GL_RGBA32F:
case GL_R8_SNORM:
case GL_RG8_SNORM:
case GL_RGB8_SNORM:
case GL_RGBA8_SNORM:
return false;
default:
UNIMPLEMENTED();
}
return false;
}
bool IsStencilRenderable(GLint internalformat, GLint clientVersion)
{
if(IsCompressed(internalformat, clientVersion))
{
return false;
}
switch(internalformat)
{
case GL_STENCIL_INDEX8:
case GL_DEPTH24_STENCIL8_OES:
return true;
case GL_DEPTH32F_STENCIL8:
return clientVersion >= 3;
case GL_R8:
case GL_R8UI:
case GL_R8I:
case GL_R16UI:
case GL_R16I:
case GL_R32UI:
case GL_R32I:
case GL_RG8:
case GL_RG8UI:
case GL_RG8I:
case GL_RG16UI:
case GL_RG16I:
case GL_RG32UI:
case GL_RG32I:
case GL_SRGB8_ALPHA8:
case GL_RGB10_A2:
case GL_RGBA8UI:
case GL_RGBA8I:
case GL_RGB10_A2UI:
case GL_RGBA16UI:
case GL_RGBA16I:
case GL_RGBA32I:
case GL_RGBA32UI:
case GL_RGBA4:
case GL_RGB5_A1:
case GL_RGB565:
case GL_RGB8:
case GL_RGBA8:
case GL_RED:
case GL_RG:
case GL_RGB:
case GL_RGBA:
case GL_R16F:
case GL_RG16F:
case GL_R11F_G11F_B10F:
case GL_RGB16F:
case GL_RGBA16F:
case GL_R32F:
case GL_RG32F:
case GL_RGB32F:
case GL_RGBA32F:
case GL_DEPTH_COMPONENT16:
case GL_DEPTH_COMPONENT24:
case GL_DEPTH_COMPONENT32_OES:
case GL_DEPTH_COMPONENT32F:
case GL_R8_SNORM:
case GL_RG8_SNORM:
case GL_RGB8_SNORM:
case GL_RGBA8_SNORM:
return false;
default:
UNIMPLEMENTED();
}
return false;
}
bool IsMipmappable(GLint internalformat, GLint clientVersion)
{
if(IsNonNormalizedInteger(internalformat))
{
return false;
}
switch(internalformat)
{
case GL_ALPHA8_EXT:
case GL_LUMINANCE8_EXT:
case GL_LUMINANCE8_ALPHA8_EXT:
case GL_ALPHA32F_EXT:
case GL_LUMINANCE32F_EXT:
case GL_LUMINANCE_ALPHA32F_EXT:
case GL_ALPHA16F_EXT:
case GL_LUMINANCE16F_EXT:
case GL_LUMINANCE_ALPHA16F_EXT:
return true;
default:
return IsColorRenderable(internalformat, clientVersion);
}
}
GLuint GetAlphaSize(GLint internalformat)
{
switch(internalformat)
{
case GL_NONE: return 0;
case GL_RGBA4: return 4;
case GL_RGB5_A1: return 1;
case GL_RGB565: return 0;
case GL_R8: return 0;
case GL_RG8: return 0;
case GL_RGB8: return 0;
case GL_RGBA8: return 8;
case GL_R16F: return 0;
case GL_RG16F: return 0;
case GL_RGB16F: return 0;
case GL_RGBA16F: return 16;
case GL_R32F: return 0;
case GL_RG32F: return 0;
case GL_RGB32F: return 0;
case GL_RGBA32F: return 32;
case GL_BGRA8_EXT: return 8;
case GL_R8UI: return 0;
case GL_R8I: return 0;
case GL_R16UI: return 0;
case GL_R16I: return 0;
case GL_R32UI: return 0;
case GL_R32I: return 0;
case GL_RG8UI: return 0;
case GL_RG8I: return 0;
case GL_RG16UI: return 0;
case GL_RG16I: return 0;
case GL_RG32UI: return 0;
case GL_RG32I: return 0;
case GL_SRGB8_ALPHA8: return 8;
case GL_RGB10_A2: return 2;
case GL_RGBA8UI: return 8;
case GL_RGBA8I: return 8;
case GL_RGB10_A2UI: return 2;
case GL_RGBA16UI: return 16;
case GL_RGBA16I: return 16;
case GL_RGBA32I: return 32;
case GL_RGBA32UI: return 32;
case GL_R11F_G11F_B10F: return 0;
default:
// UNREACHABLE(internalformat);
return 0;
}
}
GLuint GetRedSize(GLint internalformat)
{
switch(internalformat)
{
case GL_NONE: return 0;
case GL_RGBA4: return 4;
case GL_RGB5_A1: return 5;
case GL_RGB565: return 5;
case GL_R8: return 8;
case GL_RG8: return 8;
case GL_RGB8: return 8;
case GL_RGBA8: return 8;
case GL_R16F: return 16;
case GL_RG16F: return 16;
case GL_RGB16F: return 16;
case GL_RGBA16F: return 16;
case GL_R32F: return 32;
case GL_RG32F: return 32;
case GL_RGB32F: return 32;
case GL_RGBA32F: return 32;
case GL_BGRA8_EXT: return 8;
case GL_R8UI: return 8;
case GL_R8I: return 8;
case GL_R16UI: return 16;
case GL_R16I: return 16;
case GL_R32UI: return 32;
case GL_R32I: return 32;
case GL_RG8UI: return 8;
case GL_RG8I: return 8;
case GL_RG16UI: return 16;
case GL_RG16I: return 16;
case GL_RG32UI: return 32;
case GL_RG32I: return 32;
case GL_SRGB8_ALPHA8: return 8;
case GL_RGB10_A2: return 10;
case GL_RGBA8UI: return 8;
case GL_RGBA8I: return 8;
case GL_RGB10_A2UI: return 10;
case GL_RGBA16UI: return 16;
case GL_RGBA16I: return 16;
case GL_RGBA32I: return 32;
case GL_RGBA32UI: return 32;
case GL_R11F_G11F_B10F: return 11;
default:
// UNREACHABLE(internalformat);
return 0;
}
}
GLuint GetGreenSize(GLint internalformat)
{
switch(internalformat)
{
case GL_NONE: return 0;
case GL_RGBA4: return 4;
case GL_RGB5_A1: return 5;
case GL_RGB565: return 6;
case GL_R8: return 0;
case GL_RG8: return 8;
case GL_RGB8: return 8;
case GL_RGBA8: return 8;
case GL_R16F: return 0;
case GL_RG16F: return 16;
case GL_RGB16F: return 16;
case GL_RGBA16F: return 16;
case GL_R32F: return 0;
case GL_RG32F: return 32;
case GL_RGB32F: return 32;
case GL_RGBA32F: return 32;
case GL_BGRA8_EXT: return 8;
case GL_R8UI: return 0;
case GL_R8I: return 0;
case GL_R16UI: return 0;
case GL_R16I: return 0;
case GL_R32UI: return 0;
case GL_R32I: return 0;
case GL_RG8UI: return 8;
case GL_RG8I: return 8;
case GL_RG16UI: return 16;
case GL_RG16I: return 16;
case GL_RG32UI: return 32;
case GL_RG32I: return 32;
case GL_SRGB8_ALPHA8: return 8;
case GL_RGB10_A2: return 10;
case GL_RGBA8UI: return 8;
case GL_RGBA8I: return 8;
case GL_RGB10_A2UI: return 10;
case GL_RGBA16UI: return 16;
case GL_RGBA16I: return 16;
case GL_RGBA32I: return 32;
case GL_RGBA32UI: return 32;
case GL_R11F_G11F_B10F: return 11;
default:
// UNREACHABLE(internalformat);
return 0;
}
}
GLuint GetBlueSize(GLint internalformat)
{
switch(internalformat)
{
case GL_NONE: return 0;
case GL_RGBA4: return 4;
case GL_RGB5_A1: return 5;
case GL_RGB565: return 5;
case GL_R8: return 0;
case GL_RG8: return 0;
case GL_RGB8: return 8;
case GL_RGBA8: return 8;
case GL_R16F: return 0;
case GL_RG16F: return 0;
case GL_RGB16F: return 16;
case GL_RGBA16F: return 16;
case GL_R32F: return 0;
case GL_RG32F: return 0;
case GL_RGB32F: return 32;
case GL_RGBA32F: return 32;
case GL_BGRA8_EXT: return 8;
case GL_R8UI: return 0;
case GL_R8I: return 0;
case GL_R16UI: return 0;
case GL_R16I: return 0;
case GL_R32UI: return 0;
case GL_R32I: return 0;
case GL_RG8UI: return 0;
case GL_RG8I: return 0;
case GL_RG16UI: return 0;
case GL_RG16I: return 0;
case GL_RG32UI: return 0;
case GL_RG32I: return 0;
case GL_SRGB8_ALPHA8: return 8;
case GL_RGB10_A2: return 10;
case GL_RGBA8UI: return 8;
case GL_RGBA8I: return 8;
case GL_RGB10_A2UI: return 10;
case GL_RGBA16UI: return 16;
case GL_RGBA16I: return 16;
case GL_RGBA32I: return 32;
case GL_RGBA32UI: return 32;
case GL_R11F_G11F_B10F: return 10;
default:
// UNREACHABLE(internalformat);
return 0;
}
}
GLuint GetDepthSize(GLint internalformat)
{
switch(internalformat)
{
case GL_STENCIL_INDEX8: return 0;
case GL_DEPTH_COMPONENT16: return 16;
case GL_DEPTH_COMPONENT24: return 24;
case GL_DEPTH_COMPONENT32_OES: return 32;
case GL_DEPTH_COMPONENT32F: return 32;
case GL_DEPTH24_STENCIL8: return 24;
case GL_DEPTH32F_STENCIL8: return 32;
default:
// UNREACHABLE(internalformat);
return 0;
}
}
GLuint GetStencilSize(GLint internalformat)
{
switch(internalformat)
{
case GL_STENCIL_INDEX8: return 8;
case GL_DEPTH_COMPONENT16: return 0;
case GL_DEPTH_COMPONENT24: return 0;
case GL_DEPTH_COMPONENT32_OES: return 0;
case GL_DEPTH_COMPONENT32F: return 0;
case GL_DEPTH24_STENCIL8: return 8;
case GL_DEPTH32F_STENCIL8: return 8;
default:
// UNREACHABLE(internalformat);
return 0;
}
}
GLenum GetColorComponentType(GLint internalformat)
{
switch(internalformat)
{
case GL_ALPHA8_EXT:
case GL_LUMINANCE8_ALPHA8_EXT:
case GL_LUMINANCE8_EXT:
case GL_R8:
case GL_RG8:
case GL_SRGB8_ALPHA8:
case GL_RGB10_A2:
case GL_RGBA4:
case GL_RGB5_A1:
case GL_RGB565:
case GL_RGB8:
case GL_RGBA8:
case GL_SRGB8:
case GL_BGRA8_EXT:
return GL_UNSIGNED_NORMALIZED;
case GL_R8_SNORM:
case GL_RG8_SNORM:
case GL_RGB8_SNORM:
case GL_RGBA8_SNORM:
return GL_SIGNED_NORMALIZED;
case GL_R8UI:
case GL_R16UI:
case GL_R32UI:
case GL_RG8UI:
case GL_RG16UI:
case GL_RG32UI:
case GL_RGB8UI:
case GL_RGB16UI:
case GL_RGB32UI:
case GL_RGB10_A2UI:
case GL_RGBA16UI:
case GL_RGBA32UI:
case GL_RGBA8UI:
return GL_UNSIGNED_INT;
case GL_R8I:
case GL_R16I:
case GL_R32I:
case GL_RG8I:
case GL_RG16I:
case GL_RG32I:
case GL_RGB8I:
case GL_RGB16I:
case GL_RGB32I:
case GL_RGBA8I:
case GL_RGBA16I:
case GL_RGBA32I:
return GL_INT;
case GL_ALPHA32F_EXT:
case GL_LUMINANCE32F_EXT:
case GL_LUMINANCE_ALPHA32F_EXT:
case GL_ALPHA16F_EXT:
case GL_LUMINANCE16F_EXT:
case GL_LUMINANCE_ALPHA16F_EXT:
case GL_R16F:
case GL_RG16F:
case GL_R11F_G11F_B10F:
case GL_RGB16F:
case GL_RGBA16F:
case GL_R32F:
case GL_RG32F:
case GL_RGB32F:
case GL_RGBA32F:
case GL_RGB9_E5:
return GL_FLOAT;
default:
// UNREACHABLE(internalformat);
return GL_NONE;
}
}
GLenum GetComponentType(GLint internalformat, GLenum attachment)
{
// Can be one of GL_FLOAT, GL_INT, GL_UNSIGNED_INT, GL_SIGNED_NORMALIZED, or GL_UNSIGNED_NORMALIZED
switch(attachment)
{
case GL_COLOR_ATTACHMENT0:
case GL_COLOR_ATTACHMENT1:
case GL_COLOR_ATTACHMENT2:
case GL_COLOR_ATTACHMENT3:
case GL_COLOR_ATTACHMENT4:
case GL_COLOR_ATTACHMENT5:
case GL_COLOR_ATTACHMENT6:
case GL_COLOR_ATTACHMENT7:
case GL_COLOR_ATTACHMENT8:
case GL_COLOR_ATTACHMENT9:
case GL_COLOR_ATTACHMENT10:
case GL_COLOR_ATTACHMENT11:
case GL_COLOR_ATTACHMENT12:
case GL_COLOR_ATTACHMENT13:
case GL_COLOR_ATTACHMENT14:
case GL_COLOR_ATTACHMENT15:
case GL_COLOR_ATTACHMENT16:
case GL_COLOR_ATTACHMENT17:
case GL_COLOR_ATTACHMENT18:
case GL_COLOR_ATTACHMENT19:
case GL_COLOR_ATTACHMENT20:
case GL_COLOR_ATTACHMENT21:
case GL_COLOR_ATTACHMENT22:
case GL_COLOR_ATTACHMENT23:
case GL_COLOR_ATTACHMENT24:
case GL_COLOR_ATTACHMENT25:
case GL_COLOR_ATTACHMENT26:
case GL_COLOR_ATTACHMENT27:
case GL_COLOR_ATTACHMENT28:
case GL_COLOR_ATTACHMENT29:
case GL_COLOR_ATTACHMENT30:
case GL_COLOR_ATTACHMENT31:
return GetColorComponentType(internalformat);
case GL_DEPTH_ATTACHMENT:
case GL_STENCIL_ATTACHMENT:
// Only color buffers may have integer components.
return GL_FLOAT;
default:
UNREACHABLE(attachment);
return GL_NONE;
}
}
bool IsNormalizedInteger(GLint internalformat)
{
GLenum type = GetColorComponentType(internalformat);
return type == GL_UNSIGNED_NORMALIZED || type == GL_SIGNED_NORMALIZED;
}
bool IsNonNormalizedInteger(GLint internalformat)
{
GLenum type = GetColorComponentType(internalformat);
return type == GL_UNSIGNED_INT || type == GL_INT;
}
bool IsFloatFormat(GLint internalformat)
{
return GetColorComponentType(internalformat) == GL_FLOAT;
}
bool IsSignedNonNormalizedInteger(GLint internalformat)
{
return GetColorComponentType(internalformat) == GL_INT;
}
bool IsUnsignedNonNormalizedInteger(GLint internalformat)
{
return GetColorComponentType(internalformat) == GL_UNSIGNED_INT;
}
GLenum GetColorEncoding(GLint internalformat)
{
switch(internalformat)
{
case GL_SRGB8:
case GL_SRGB8_ALPHA8:
return GL_SRGB;
default:
// [OpenGL ES 3.0.5] section 6.1.13 page 242:
// If attachment is not a color attachment, or no data storage or texture image
// has been specified for the attachment, params will contain the value LINEAR.
return GL_LINEAR;
}
}
std::string ParseUniformName(const std::string &name, unsigned int *outSubscript)
{
// Strip any trailing array operator and retrieve the subscript
size_t open = name.find_last_of('[');
size_t close = name.find_last_of(']');
bool hasIndex = (open != std::string::npos) && (close == name.length() - 1);
if(!hasIndex)
{
if(outSubscript)
{
*outSubscript = GL_INVALID_INDEX;
}
return name;
}
if(outSubscript)
{
int index = atoi(name.substr(open + 1).c_str());
if(index >= 0)
{
*outSubscript = index;
}
else
{
*outSubscript = GL_INVALID_INDEX;
}
}
return name.substr(0, open);
}
}
namespace es2sw
{
sw::DepthCompareMode ConvertDepthComparison(GLenum comparison)
{
switch(comparison)
{
case GL_NEVER: return sw::DEPTH_NEVER;
case GL_ALWAYS: return sw::DEPTH_ALWAYS;
case GL_LESS: return sw::DEPTH_LESS;
case GL_LEQUAL: return sw::DEPTH_LESSEQUAL;
case GL_EQUAL: return sw::DEPTH_EQUAL;
case GL_GREATER: return sw::DEPTH_GREATER;
case GL_GEQUAL: return sw::DEPTH_GREATEREQUAL;
case GL_NOTEQUAL: return sw::DEPTH_NOTEQUAL;
default: UNREACHABLE(comparison);
}
return sw::DEPTH_ALWAYS;
}
sw::StencilCompareMode ConvertStencilComparison(GLenum comparison)
{
switch(comparison)
{
case GL_NEVER: return sw::STENCIL_NEVER;
case GL_ALWAYS: return sw::STENCIL_ALWAYS;
case GL_LESS: return sw::STENCIL_LESS;
case GL_LEQUAL: return sw::STENCIL_LESSEQUAL;
case GL_EQUAL: return sw::STENCIL_EQUAL;
case GL_GREATER: return sw::STENCIL_GREATER;
case GL_GEQUAL: return sw::STENCIL_GREATEREQUAL;
case GL_NOTEQUAL: return sw::STENCIL_NOTEQUAL;
default: UNREACHABLE(comparison);
}
return sw::STENCIL_ALWAYS;
}
sw::Color<float> ConvertColor(es2::Color color)
{
return sw::Color<float>(color.red, color.green, color.blue, color.alpha);
}
sw::BlendFactor ConvertBlendFunc(GLenum blend)
{
switch(blend)
{
case GL_ZERO: return sw::BLEND_ZERO;
case GL_ONE: return sw::BLEND_ONE;
case GL_SRC_COLOR: return sw::BLEND_SOURCE;
case GL_ONE_MINUS_SRC_COLOR: return sw::BLEND_INVSOURCE;
case GL_DST_COLOR: return sw::BLEND_DEST;
case GL_ONE_MINUS_DST_COLOR: return sw::BLEND_INVDEST;
case GL_SRC_ALPHA: return sw::BLEND_SOURCEALPHA;
case GL_ONE_MINUS_SRC_ALPHA: return sw::BLEND_INVSOURCEALPHA;
case GL_DST_ALPHA: return sw::BLEND_DESTALPHA;
case GL_ONE_MINUS_DST_ALPHA: return sw::BLEND_INVDESTALPHA;
case GL_CONSTANT_COLOR: return sw::BLEND_CONSTANT;
case GL_ONE_MINUS_CONSTANT_COLOR: return sw::BLEND_INVCONSTANT;
case GL_CONSTANT_ALPHA: return sw::BLEND_CONSTANTALPHA;
case GL_ONE_MINUS_CONSTANT_ALPHA: return sw::BLEND_INVCONSTANTALPHA;
case GL_SRC_ALPHA_SATURATE: return sw::BLEND_SRCALPHASAT;
default: UNREACHABLE(blend);
}
return sw::BLEND_ZERO;
}
sw::BlendOperation ConvertBlendOp(GLenum blendOp)
{
switch(blendOp)
{
case GL_FUNC_ADD: return sw::BLENDOP_ADD;
case GL_FUNC_SUBTRACT: return sw::BLENDOP_SUB;
case GL_FUNC_REVERSE_SUBTRACT: return sw::BLENDOP_INVSUB;
case GL_MIN_EXT: return sw::BLENDOP_MIN;
case GL_MAX_EXT: return sw::BLENDOP_MAX;
default: UNREACHABLE(blendOp);
}
return sw::BLENDOP_ADD;
}
sw::StencilOperation ConvertStencilOp(GLenum stencilOp)
{
switch(stencilOp)
{
case GL_ZERO: return sw::OPERATION_ZERO;
case GL_KEEP: return sw::OPERATION_KEEP;
case GL_REPLACE: return sw::OPERATION_REPLACE;
case GL_INCR: return sw::OPERATION_INCRSAT;
case GL_DECR: return sw::OPERATION_DECRSAT;
case GL_INVERT: return sw::OPERATION_INVERT;
case GL_INCR_WRAP: return sw::OPERATION_INCR;
case GL_DECR_WRAP: return sw::OPERATION_DECR;
default: UNREACHABLE(stencilOp);
}
return sw::OPERATION_KEEP;
}
sw::AddressingMode ConvertTextureWrap(GLenum wrap)
{
switch(wrap)
{
case GL_REPEAT: return sw::ADDRESSING_WRAP;
case GL_CLAMP_TO_EDGE: return sw::ADDRESSING_CLAMP;
case GL_MIRRORED_REPEAT: return sw::ADDRESSING_MIRROR;
default: UNREACHABLE(wrap);
}
return sw::ADDRESSING_WRAP;
}
sw::CompareFunc ConvertCompareFunc(GLenum compareFunc, GLenum compareMode)
{
if(compareMode == GL_COMPARE_REF_TO_TEXTURE)
{
switch(compareFunc)
{
case GL_LEQUAL: return sw::COMPARE_LESSEQUAL;
case GL_GEQUAL: return sw::COMPARE_GREATEREQUAL;
case GL_LESS: return sw::COMPARE_LESS;
case GL_GREATER: return sw::COMPARE_GREATER;
case GL_EQUAL: return sw::COMPARE_EQUAL;
case GL_NOTEQUAL: return sw::COMPARE_NOTEQUAL;
case GL_ALWAYS: return sw::COMPARE_ALWAYS;
case GL_NEVER: return sw::COMPARE_NEVER;
default: UNREACHABLE(compareFunc);
}
}
else if(compareMode == GL_NONE)
{
return sw::COMPARE_BYPASS;
}
else UNREACHABLE(compareMode);
return sw::COMPARE_BYPASS;
};
sw::SwizzleType ConvertSwizzleType(GLenum swizzleType)
{
switch(swizzleType)
{
case GL_RED: return sw::SWIZZLE_RED;
case GL_GREEN: return sw::SWIZZLE_GREEN;
case GL_BLUE: return sw::SWIZZLE_BLUE;
case GL_ALPHA: return sw::SWIZZLE_ALPHA;
case GL_ZERO: return sw::SWIZZLE_ZERO;
case GL_ONE: return sw::SWIZZLE_ONE;
default: UNREACHABLE(swizzleType);
}
return sw::SWIZZLE_RED;
};
sw::CullMode ConvertCullMode(GLenum cullFace, GLenum frontFace)
{
switch(cullFace)
{
case GL_FRONT:
return (frontFace == GL_CCW ? sw::CULL_CLOCKWISE : sw::CULL_COUNTERCLOCKWISE);
case GL_BACK:
return (frontFace == GL_CCW ? sw::CULL_COUNTERCLOCKWISE : sw::CULL_CLOCKWISE);
case GL_FRONT_AND_BACK:
return sw::CULL_NONE; // culling will be handled during draw
default: UNREACHABLE(cullFace);
}
return sw::CULL_COUNTERCLOCKWISE;
}
unsigned int ConvertColorMask(bool red, bool green, bool blue, bool alpha)
{
return (red ? 0x00000001 : 0) |
(green ? 0x00000002 : 0) |
(blue ? 0x00000004 : 0) |
(alpha ? 0x00000008 : 0);
}
sw::MipmapType ConvertMipMapFilter(GLenum minFilter)
{
switch(minFilter)
{
case GL_NEAREST:
case GL_LINEAR:
return sw::MIPMAP_NONE;
case GL_NEAREST_MIPMAP_NEAREST:
case GL_LINEAR_MIPMAP_NEAREST:
return sw::MIPMAP_POINT;
case GL_NEAREST_MIPMAP_LINEAR:
case GL_LINEAR_MIPMAP_LINEAR:
return sw::MIPMAP_LINEAR;
default:
UNREACHABLE(minFilter);
return sw::MIPMAP_NONE;
}
}
sw::FilterType ConvertTextureFilter(GLenum minFilter, GLenum magFilter, float maxAnisotropy)
{
if(maxAnisotropy > 1.0f)
{
return sw::FILTER_ANISOTROPIC;
}
switch(magFilter)
{
case GL_NEAREST:
case GL_LINEAR:
break;
default:
UNREACHABLE(magFilter);
}
switch(minFilter)
{
case GL_NEAREST:
case GL_NEAREST_MIPMAP_NEAREST:
case GL_NEAREST_MIPMAP_LINEAR:
return (magFilter == GL_NEAREST) ? sw::FILTER_POINT : sw::FILTER_MIN_POINT_MAG_LINEAR;
case GL_LINEAR:
case GL_LINEAR_MIPMAP_NEAREST:
case GL_LINEAR_MIPMAP_LINEAR:
return (magFilter == GL_NEAREST) ? sw::FILTER_MIN_LINEAR_MAG_POINT : sw::FILTER_LINEAR;
default:
UNREACHABLE(minFilter);
return sw::FILTER_POINT;
}
}
bool ConvertPrimitiveType(GLenum primitiveType, GLsizei elementCount, GLenum elementType, sw::DrawType &drawType, int &primitiveCount, int &verticesPerPrimitive)
{
switch(primitiveType)
{
case GL_POINTS:
drawType = sw::DRAW_POINTLIST;
primitiveCount = elementCount;
verticesPerPrimitive = 1;
break;
case GL_LINES:
drawType = sw::DRAW_LINELIST;
primitiveCount = elementCount / 2;
verticesPerPrimitive = 2;
break;
case GL_LINE_LOOP:
drawType = sw::DRAW_LINELOOP;
primitiveCount = elementCount;
verticesPerPrimitive = 2;
break;
case GL_LINE_STRIP:
drawType = sw::DRAW_LINESTRIP;
primitiveCount = elementCount - 1;
verticesPerPrimitive = 2;
break;
case GL_TRIANGLES:
drawType = sw::DRAW_TRIANGLELIST;
primitiveCount = elementCount / 3;
verticesPerPrimitive = 3;
break;
case GL_TRIANGLE_STRIP:
drawType = sw::DRAW_TRIANGLESTRIP;
primitiveCount = elementCount - 2;
verticesPerPrimitive = 3;
break;
case GL_TRIANGLE_FAN:
drawType = sw::DRAW_TRIANGLEFAN;
primitiveCount = elementCount - 2;
verticesPerPrimitive = 3;
break;
default:
return false;
}
sw::DrawType elementSize;
switch(elementType)
{
case GL_NONE: elementSize = sw::DRAW_NONINDEXED; break;
case GL_UNSIGNED_BYTE: elementSize = sw::DRAW_INDEXED8; break;
case GL_UNSIGNED_SHORT: elementSize = sw::DRAW_INDEXED16; break;
case GL_UNSIGNED_INT: elementSize = sw::DRAW_INDEXED32; break;
default: return false;
}
drawType = sw::DrawType(drawType | elementSize);
return true;
}
}
namespace sw2es
{
GLenum ConvertBackBufferFormat(sw::Format format)
{
switch(format)
{
case sw::FORMAT_A4R4G4B4: return GL_RGBA4;
case sw::FORMAT_A8R8G8B8: return GL_RGBA8;
case sw::FORMAT_A8B8G8R8: return GL_RGBA8;
case sw::FORMAT_A1R5G5B5: return GL_RGB5_A1;
case sw::FORMAT_R5G6B5: return GL_RGB565;
case sw::FORMAT_X8R8G8B8: return GL_RGB8;
case sw::FORMAT_X8B8G8R8: return GL_RGB8;
case sw::FORMAT_SRGB8_A8: return GL_RGBA8;
case sw::FORMAT_SRGB8_X8: return GL_RGB8;
default:
UNREACHABLE(format);
}
return GL_RGBA4;
}
GLenum ConvertDepthStencilFormat(sw::Format format)
{
switch(format)
{
case sw::FORMAT_D16: return GL_DEPTH_COMPONENT16;
case sw::FORMAT_D24X8: return GL_DEPTH_COMPONENT24;
case sw::FORMAT_D32: return GL_DEPTH_COMPONENT32_OES;
case sw::FORMAT_D24S8: return GL_DEPTH24_STENCIL8_OES;
case sw::FORMAT_D32F: return GL_DEPTH_COMPONENT32F;
case sw::FORMAT_D32FS8: return GL_DEPTH32F_STENCIL8;
case sw::FORMAT_S8: return GL_STENCIL_INDEX8;
default:
UNREACHABLE(format);
}
return GL_DEPTH24_STENCIL8_OES;
}
}