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|
#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.
//
// validationES2.cpp: Validation functions for OpenGL ES 2.0 entry point parameters
#include "libGLESv2/validationES2.h"
#include "libGLESv2/validationES.h"
#include "libGLESv2/Context.h"
#include "libGLESv2/Texture.h"
#include "libGLESv2/Framebuffer.h"
#include "libGLESv2/Renderbuffer.h"
#include "libGLESv2/formatutils.h"
#include "libGLESv2/main.h"
#include "libGLESv2/FramebufferAttachment.h"
#include "common/mathutil.h"
#include "common/utilities.h"
namespace gl
{
static bool validateSubImageParams2D(bool compressed, GLsizei width, GLsizei height,
GLint xoffset, GLint yoffset, GLint level, GLenum format, GLenum type,
gl::Texture2D *texture)
{
if (!texture)
{
return gl::error(GL_INVALID_OPERATION, false);
}
if (compressed != texture->isCompressed(level))
{
return gl::error(GL_INVALID_OPERATION, false);
}
if (format != GL_NONE)
{
GLenum internalformat = gl::GetSizedInternalFormat(format, type);
if (internalformat != texture->getInternalFormat(level))
{
return gl::error(GL_INVALID_OPERATION, false);
}
}
if (compressed)
{
if ((width % 4 != 0 && width != texture->getWidth(level)) ||
(height % 4 != 0 && height != texture->getHeight(level)))
{
return gl::error(GL_INVALID_OPERATION, false);
}
}
if (xoffset + width > texture->getWidth(level) ||
yoffset + height > texture->getHeight(level))
{
return gl::error(GL_INVALID_VALUE, false);
}
return true;
}
static bool validateSubImageParamsCube(bool compressed, GLsizei width, GLsizei height,
GLint xoffset, GLint yoffset, GLenum target, GLint level, GLenum format, GLenum type,
gl::TextureCubeMap *texture)
{
if (!texture)
{
return gl::error(GL_INVALID_OPERATION, false);
}
if (compressed != texture->isCompressed(target, level))
{
return gl::error(GL_INVALID_OPERATION, false);
}
if (format != GL_NONE)
{
GLenum internalformat = gl::GetSizedInternalFormat(format, type);
if (internalformat != texture->getInternalFormat(target, level))
{
return gl::error(GL_INVALID_OPERATION, false);
}
}
if (compressed)
{
if ((width % 4 != 0 && width != texture->getWidth(target, 0)) ||
(height % 4 != 0 && height != texture->getHeight(target, 0)))
{
return gl::error(GL_INVALID_OPERATION, false);
}
}
if (xoffset + width > texture->getWidth(target, level) ||
yoffset + height > texture->getHeight(target, level))
{
return gl::error(GL_INVALID_VALUE, false);
}
return true;
}
bool ValidateES2TexImageParameters(gl::Context *context, GLenum target, GLint level, GLenum internalformat, bool isCompressed, bool isSubImage,
GLint xoffset, GLint yoffset, GLsizei width, GLsizei height,
GLint border, GLenum format, GLenum type, const GLvoid *pixels)
{
if (!ValidTexture2DDestinationTarget(context, target))
{
return gl::error(GL_INVALID_ENUM, false);
}
if (!ValidImageSize(context, target, level, width, height, 1))
{
return gl::error(GL_INVALID_VALUE, false);
}
if (level < 0 || xoffset < 0 ||
std::numeric_limits<GLsizei>::max() - xoffset < width ||
std::numeric_limits<GLsizei>::max() - yoffset < height)
{
return gl::error(GL_INVALID_VALUE, false);
}
if (!isSubImage && !isCompressed && internalformat != format)
{
return gl::error(GL_INVALID_OPERATION, false);
}
const gl::Caps &caps = context->getCaps();
gl::Texture *texture = NULL;
bool textureCompressed = false;
GLenum textureInternalFormat = GL_NONE;
GLint textureLevelWidth = 0;
GLint textureLevelHeight = 0;
switch (target)
{
case GL_TEXTURE_2D:
{
if (static_cast<GLuint>(width) > (caps.max2DTextureSize >> level) ||
static_cast<GLuint>(height) > (caps.max2DTextureSize >> level))
{
return gl::error(GL_INVALID_VALUE, false);
}
gl::Texture2D *tex2d = context->getTexture2D();
if (tex2d)
{
textureCompressed = tex2d->isCompressed(level);
textureInternalFormat = tex2d->getInternalFormat(level);
textureLevelWidth = tex2d->getWidth(level);
textureLevelHeight = tex2d->getHeight(level);
texture = tex2d;
}
if (isSubImage && !validateSubImageParams2D(isCompressed, width, height, xoffset, yoffset,
level, format, type, tex2d))
{
return false;
}
texture = tex2d;
}
break;
case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
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:
{
if (!isSubImage && width != height)
{
return gl::error(GL_INVALID_VALUE, false);
}
if (static_cast<GLuint>(width) > (caps.maxCubeMapTextureSize >> level) ||
static_cast<GLuint>(height) > (caps.maxCubeMapTextureSize >> level))
{
return gl::error(GL_INVALID_VALUE, false);
}
gl::TextureCubeMap *texCube = context->getTextureCubeMap();
if (texCube)
{
textureCompressed = texCube->isCompressed(target, level);
textureInternalFormat = texCube->getInternalFormat(target, level);
textureLevelWidth = texCube->getWidth(target, level);
textureLevelHeight = texCube->getHeight(target, level);
texture = texCube;
}
if (isSubImage && !validateSubImageParamsCube(isCompressed, width, height, xoffset, yoffset,
target, level, format, type, texCube))
{
return false;
}
}
break;
default:
return gl::error(GL_INVALID_ENUM, false);
}
if (!texture)
{
return gl::error(GL_INVALID_OPERATION, false);
}
if (!isSubImage && texture->isImmutable())
{
return gl::error(GL_INVALID_OPERATION, false);
}
// Verify zero border
if (border != 0)
{
return gl::error(GL_INVALID_VALUE, false);
}
GLenum actualInternalFormat = isSubImage ? textureInternalFormat : internalformat;
if (isCompressed)
{
if (!ValidCompressedImageSize(context, actualInternalFormat, width, height))
{
return gl::error(GL_INVALID_OPERATION, false);
}
switch (actualInternalFormat)
{
case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
if (!context->getExtensions().textureCompressionDXT1)
{
return gl::error(GL_INVALID_ENUM, false);
}
break;
case GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE:
if (!context->getExtensions().textureCompressionDXT1)
{
return gl::error(GL_INVALID_ENUM, false);
}
break;
case GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE:
if (!context->getExtensions().textureCompressionDXT5)
{
return gl::error(GL_INVALID_ENUM, false);
}
break;
default:
return gl::error(GL_INVALID_ENUM, false);
}
}
else
{
// validate <type> by itself (used as secondary key below)
switch (type)
{
case GL_UNSIGNED_BYTE:
case GL_UNSIGNED_SHORT_5_6_5:
case GL_UNSIGNED_SHORT_4_4_4_4:
case GL_UNSIGNED_SHORT_5_5_5_1:
case GL_UNSIGNED_SHORT:
case GL_UNSIGNED_INT:
case GL_UNSIGNED_INT_24_8_OES:
case GL_HALF_FLOAT_OES:
case GL_FLOAT:
break;
default:
return gl::error(GL_INVALID_ENUM, false);
}
// validate <format> + <type> combinations
// - invalid <format> -> sets INVALID_ENUM
// - invalid <format>+<type> combination -> sets INVALID_OPERATION
switch (format)
{
case GL_ALPHA:
case GL_LUMINANCE:
case GL_LUMINANCE_ALPHA:
switch (type)
{
case GL_UNSIGNED_BYTE:
case GL_FLOAT:
case GL_HALF_FLOAT_OES:
break;
default:
return gl::error(GL_INVALID_OPERATION, false);
}
break;
case GL_RED:
case GL_RG:
if (!context->getExtensions().textureRG)
{
return gl::error(GL_INVALID_ENUM, false);
}
switch (type)
{
case GL_UNSIGNED_BYTE:
case GL_FLOAT:
case GL_HALF_FLOAT_OES:
break;
default:
return gl::error(GL_INVALID_OPERATION, false);
}
break;
case GL_RGB:
switch (type)
{
case GL_UNSIGNED_BYTE:
case GL_UNSIGNED_SHORT_5_6_5:
case GL_FLOAT:
case GL_HALF_FLOAT_OES:
break;
default:
return gl::error(GL_INVALID_OPERATION, false);
}
break;
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:
case GL_HALF_FLOAT_OES:
break;
default:
return gl::error(GL_INVALID_OPERATION, false);
}
break;
case GL_BGRA_EXT:
switch (type)
{
case GL_UNSIGNED_BYTE:
break;
default:
return gl::error(GL_INVALID_OPERATION, false);
}
break;
case GL_SRGB_EXT:
case GL_SRGB_ALPHA_EXT:
if (!context->getExtensions().sRGB)
{
return gl::error(GL_INVALID_ENUM, false);
}
switch (type)
{
case GL_UNSIGNED_BYTE:
break;
default:
return gl::error(GL_INVALID_OPERATION, false);
}
break;
case GL_COMPRESSED_RGB_S3TC_DXT1_EXT: // error cases for compressed textures are handled below
case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
case GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE:
case GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE:
break;
case GL_DEPTH_COMPONENT:
switch (type)
{
case GL_UNSIGNED_SHORT:
case GL_UNSIGNED_INT:
break;
default:
return gl::error(GL_INVALID_OPERATION, false);
}
break;
case GL_DEPTH_STENCIL_OES:
switch (type)
{
case GL_UNSIGNED_INT_24_8_OES:
break;
default:
return gl::error(GL_INVALID_OPERATION, false);
}
break;
default:
return gl::error(GL_INVALID_ENUM, false);
}
switch (format)
{
case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
if (context->getExtensions().textureCompressionDXT1)
{
return gl::error(GL_INVALID_OPERATION, false);
}
else
{
return gl::error(GL_INVALID_ENUM, false);
}
break;
case GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE:
if (context->getExtensions().textureCompressionDXT3)
{
return gl::error(GL_INVALID_OPERATION, false);
}
else
{
return gl::error(GL_INVALID_ENUM, false);
}
break;
case GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE:
if (context->getExtensions().textureCompressionDXT5)
{
return gl::error(GL_INVALID_OPERATION, false);
}
else
{
return gl::error(GL_INVALID_ENUM, false);
}
break;
case GL_DEPTH_COMPONENT:
case GL_DEPTH_STENCIL_OES:
if (!context->getExtensions().depthTextures)
{
return gl::error(GL_INVALID_VALUE, false);
}
if (target != GL_TEXTURE_2D)
{
return gl::error(GL_INVALID_OPERATION, false);
}
// OES_depth_texture supports loading depth data and multiple levels,
// but ANGLE_depth_texture does not
if (pixels != NULL || level != 0)
{
return gl::error(GL_INVALID_OPERATION, false);
}
break;
default:
break;
}
if (type == GL_FLOAT)
{
if (!context->getExtensions().textureFloat)
{
return gl::error(GL_INVALID_ENUM, false);
}
}
else if (type == GL_HALF_FLOAT_OES)
{
if (!context->getExtensions().textureHalfFloat)
{
return gl::error(GL_INVALID_ENUM, false);
}
}
}
return true;
}
bool ValidateES2CopyTexImageParameters(gl::Context* context, GLenum target, GLint level, GLenum internalformat, bool isSubImage,
GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height,
GLint border)
{
GLenum textureInternalFormat = GL_NONE;
if (!ValidateCopyTexImageParametersBase(context, target, level, internalformat, isSubImage,
xoffset, yoffset, 0, x, y, width, height, border, &textureInternalFormat))
{
return false;
}
gl::Framebuffer *framebuffer = context->getState().getReadFramebuffer();
GLenum colorbufferFormat = framebuffer->getReadColorbuffer()->getInternalFormat();
GLenum textureFormat = gl::GetFormat(textureInternalFormat);
// [OpenGL ES 2.0.24] table 3.9
if (isSubImage)
{
switch (textureFormat)
{
case GL_ALPHA:
if (colorbufferFormat != GL_ALPHA8_EXT &&
colorbufferFormat != GL_RGBA4 &&
colorbufferFormat != GL_RGB5_A1 &&
colorbufferFormat != GL_RGBA8_OES)
{
return gl::error(GL_INVALID_OPERATION, false);
}
break;
case GL_LUMINANCE:
if (colorbufferFormat != GL_R8_EXT &&
colorbufferFormat != GL_RG8_EXT &&
colorbufferFormat != GL_RGB565 &&
colorbufferFormat != GL_RGB8_OES &&
colorbufferFormat != GL_RGBA4 &&
colorbufferFormat != GL_RGB5_A1 &&
colorbufferFormat != GL_RGBA8_OES)
{
return gl::error(GL_INVALID_OPERATION, false);
}
break;
case GL_RED_EXT:
if (colorbufferFormat != GL_R8_EXT &&
colorbufferFormat != GL_RG8_EXT &&
colorbufferFormat != GL_RGB565 &&
colorbufferFormat != GL_RGB8_OES &&
colorbufferFormat != GL_RGBA4 &&
colorbufferFormat != GL_RGB5_A1 &&
colorbufferFormat != GL_RGBA8_OES)
{
return gl::error(GL_INVALID_OPERATION, false);
}
break;
case GL_RG_EXT:
if (colorbufferFormat != GL_RG8_EXT &&
colorbufferFormat != GL_RGB565 &&
colorbufferFormat != GL_RGB8_OES &&
colorbufferFormat != GL_RGBA4 &&
colorbufferFormat != GL_RGB5_A1 &&
colorbufferFormat != GL_RGBA8_OES)
{
return gl::error(GL_INVALID_OPERATION, false);
}
break;
case GL_RGB:
if (colorbufferFormat != GL_RGB565 &&
colorbufferFormat != GL_RGB8_OES &&
colorbufferFormat != GL_RGBA4 &&
colorbufferFormat != GL_RGB5_A1 &&
colorbufferFormat != GL_RGBA8_OES)
{
return gl::error(GL_INVALID_OPERATION, false);
}
break;
case GL_LUMINANCE_ALPHA:
case GL_RGBA:
if (colorbufferFormat != GL_RGBA4 &&
colorbufferFormat != GL_RGB5_A1 &&
colorbufferFormat != GL_RGBA8_OES)
{
return gl::error(GL_INVALID_OPERATION, false);
}
break;
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:
return gl::error(GL_INVALID_OPERATION, false);
case GL_DEPTH_COMPONENT:
case GL_DEPTH_STENCIL_OES:
return gl::error(GL_INVALID_OPERATION, false);
default:
return gl::error(GL_INVALID_OPERATION, false);
}
}
else
{
switch (internalformat)
{
case GL_ALPHA:
if (colorbufferFormat != GL_ALPHA8_EXT &&
colorbufferFormat != GL_RGBA4 &&
colorbufferFormat != GL_RGB5_A1 &&
colorbufferFormat != GL_BGRA8_EXT &&
colorbufferFormat != GL_RGBA8_OES)
{
return gl::error(GL_INVALID_OPERATION, false);
}
break;
case GL_LUMINANCE:
if (colorbufferFormat != GL_R8_EXT &&
colorbufferFormat != GL_RG8_EXT &&
colorbufferFormat != GL_RGB565 &&
colorbufferFormat != GL_RGB8_OES &&
colorbufferFormat != GL_RGBA4 &&
colorbufferFormat != GL_RGB5_A1 &&
colorbufferFormat != GL_BGRA8_EXT &&
colorbufferFormat != GL_RGBA8_OES)
{
return gl::error(GL_INVALID_OPERATION, false);
}
break;
case GL_RED_EXT:
if (colorbufferFormat != GL_R8_EXT &&
colorbufferFormat != GL_RG8_EXT &&
colorbufferFormat != GL_RGB565 &&
colorbufferFormat != GL_RGB8_OES &&
colorbufferFormat != GL_RGBA4 &&
colorbufferFormat != GL_RGB5_A1 &&
colorbufferFormat != GL_BGRA8_EXT &&
colorbufferFormat != GL_RGBA8_OES)
{
return gl::error(GL_INVALID_OPERATION, false);
}
break;
case GL_RG_EXT:
if (colorbufferFormat != GL_RG8_EXT &&
colorbufferFormat != GL_RGB565 &&
colorbufferFormat != GL_RGB8_OES &&
colorbufferFormat != GL_RGBA4 &&
colorbufferFormat != GL_RGB5_A1 &&
colorbufferFormat != GL_BGRA8_EXT &&
colorbufferFormat != GL_RGBA8_OES)
{
return gl::error(GL_INVALID_OPERATION, false);
}
break;
case GL_RGB:
if (colorbufferFormat != GL_RGB565 &&
colorbufferFormat != GL_RGB8_OES &&
colorbufferFormat != GL_RGBA4 &&
colorbufferFormat != GL_RGB5_A1 &&
colorbufferFormat != GL_BGRA8_EXT &&
colorbufferFormat != GL_RGBA8_OES)
{
return gl::error(GL_INVALID_OPERATION, false);
}
break;
case GL_LUMINANCE_ALPHA:
case GL_RGBA:
if (colorbufferFormat != GL_RGBA4 &&
colorbufferFormat != GL_RGB5_A1 &&
colorbufferFormat != GL_BGRA8_EXT &&
colorbufferFormat != GL_RGBA8_OES)
{
return gl::error(GL_INVALID_OPERATION, false);
}
break;
case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
if (context->getExtensions().textureCompressionDXT1)
{
return gl::error(GL_INVALID_OPERATION, false);
}
else
{
return gl::error(GL_INVALID_ENUM, false);
}
break;
case GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE:
if (context->getExtensions().textureCompressionDXT3)
{
return gl::error(GL_INVALID_OPERATION, false);
}
else
{
return gl::error(GL_INVALID_ENUM, false);
}
break;
case GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE:
if (context->getExtensions().textureCompressionDXT5)
{
return gl::error(GL_INVALID_OPERATION, false);
}
else
{
return gl::error(GL_INVALID_ENUM, false);
}
break;
case GL_DEPTH_COMPONENT:
case GL_DEPTH_COMPONENT16:
case GL_DEPTH_COMPONENT32_OES:
case GL_DEPTH_STENCIL_OES:
case GL_DEPTH24_STENCIL8_OES:
if (context->getExtensions().depthTextures)
{
return gl::error(GL_INVALID_OPERATION, false);
}
else
{
return gl::error(GL_INVALID_ENUM, false);
}
default:
return gl::error(GL_INVALID_ENUM, false);
}
}
// If width or height is zero, it is a no-op. Return false without setting an error.
return (width > 0 && height > 0);
}
bool ValidateES2TexStorageParameters(gl::Context *context, GLenum target, GLsizei levels, GLenum internalformat,
GLsizei width, GLsizei height)
{
if (target != GL_TEXTURE_2D && target != GL_TEXTURE_CUBE_MAP)
{
return gl::error(GL_INVALID_ENUM, false);
}
if (width < 1 || height < 1 || levels < 1)
{
return gl::error(GL_INVALID_VALUE, false);
}
if (target == GL_TEXTURE_CUBE_MAP && width != height)
{
return gl::error(GL_INVALID_VALUE, false);
}
if (levels != 1 && levels != gl::log2(std::max(width, height)) + 1)
{
return gl::error(GL_INVALID_OPERATION, false);
}
GLenum format = gl::GetFormat(internalformat);
GLenum type = gl::GetType(internalformat);
if (format == GL_NONE || type == GL_NONE)
{
return gl::error(GL_INVALID_ENUM, false);
}
const gl::Caps &caps = context->getCaps();
switch (target)
{
case GL_TEXTURE_2D:
if (static_cast<GLuint>(width) > caps.max2DTextureSize ||
static_cast<GLuint>(height) > caps.max2DTextureSize)
{
return gl::error(GL_INVALID_VALUE, false);
}
break;
case GL_TEXTURE_CUBE_MAP:
if (static_cast<GLuint>(width) > caps.maxCubeMapTextureSize ||
static_cast<GLuint>(height) > caps.maxCubeMapTextureSize)
{
return gl::error(GL_INVALID_VALUE, false);
}
break;
default:
return gl::error(GL_INVALID_ENUM, false);
}
if (levels != 1 && !context->getExtensions().textureNPOT)
{
if (!gl::isPow2(width) || !gl::isPow2(height))
{
return gl::error(GL_INVALID_OPERATION, false);
}
}
switch (internalformat)
{
case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
if (!context->getExtensions().textureCompressionDXT1)
{
return gl::error(GL_INVALID_ENUM, false);
}
break;
case GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE:
if (!context->getExtensions().textureCompressionDXT3)
{
return gl::error(GL_INVALID_ENUM, false);
}
break;
case GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE:
if (!context->getExtensions().textureCompressionDXT5)
{
return gl::error(GL_INVALID_ENUM, false);
}
break;
case GL_RGBA32F_EXT:
case GL_RGB32F_EXT:
case GL_ALPHA32F_EXT:
case GL_LUMINANCE32F_EXT:
case GL_LUMINANCE_ALPHA32F_EXT:
if (!context->getExtensions().textureFloat)
{
return gl::error(GL_INVALID_ENUM, false);
}
break;
case GL_RGBA16F_EXT:
case GL_RGB16F_EXT:
case GL_ALPHA16F_EXT:
case GL_LUMINANCE16F_EXT:
case GL_LUMINANCE_ALPHA16F_EXT:
if (!context->getExtensions().textureHalfFloat)
{
return gl::error(GL_INVALID_ENUM, false);
}
break;
case GL_R8_EXT:
case GL_RG8_EXT:
case GL_R16F_EXT:
case GL_RG16F_EXT:
case GL_R32F_EXT:
case GL_RG32F_EXT:
if (!context->getExtensions().textureRG)
{
return gl::error(GL_INVALID_ENUM, false);
}
break;
case GL_DEPTH_COMPONENT16:
case GL_DEPTH_COMPONENT32_OES:
case GL_DEPTH24_STENCIL8_OES:
if (!context->getExtensions().depthTextures)
{
return gl::error(GL_INVALID_ENUM, false);
}
if (target != GL_TEXTURE_2D)
{
return gl::error(GL_INVALID_OPERATION, false);
}
// ANGLE_depth_texture only supports 1-level textures
if (levels != 1)
{
return gl::error(GL_INVALID_OPERATION, false);
}
break;
default:
break;
}
gl::Texture *texture = NULL;
switch(target)
{
case GL_TEXTURE_2D:
texture = context->getTexture2D();
break;
case GL_TEXTURE_CUBE_MAP:
texture = context->getTextureCubeMap();
break;
default:
UNREACHABLE();
}
if (!texture || texture->id() == 0)
{
return gl::error(GL_INVALID_OPERATION, false);
}
if (texture->isImmutable())
{
return gl::error(GL_INVALID_OPERATION, false);
}
return true;
}
// check for combinations of format and type that are valid for ReadPixels
bool ValidES2ReadFormatType(gl::Context *context, GLenum format, GLenum type)
{
switch (format)
{
case GL_RGBA:
switch (type)
{
case GL_UNSIGNED_BYTE:
break;
default:
return false;
}
break;
case GL_BGRA_EXT:
switch (type)
{
case GL_UNSIGNED_BYTE:
case GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT:
case GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT:
break;
default:
return false;
}
break;
case GL_RG_EXT:
case GL_RED_EXT:
if (!context->getExtensions().textureRG)
{
return false;
}
switch (type)
{
case GL_UNSIGNED_BYTE:
break;
default:
return false;
}
break;
default:
return false;
}
return true;
}
}
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