diff options
Diffstat (limited to 'src/3rdparty/angle/src/libANGLE/validationES2.cpp')
| -rw-r--r-- | src/3rdparty/angle/src/libANGLE/validationES2.cpp | 882 |
1 files changed, 882 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/libANGLE/validationES2.cpp b/src/3rdparty/angle/src/libANGLE/validationES2.cpp new file mode 100644 index 0000000000..9eece1b54a --- /dev/null +++ b/src/3rdparty/angle/src/libANGLE/validationES2.cpp @@ -0,0 +1,882 @@ +// +// 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 "libANGLE/validationES2.h" +#include "libANGLE/validationES.h" +#include "libANGLE/Context.h" +#include "libANGLE/Texture.h" +#include "libANGLE/Framebuffer.h" +#include "libANGLE/Renderbuffer.h" +#include "libANGLE/formatutils.h" +#include "libANGLE/FramebufferAttachment.h" + +#include "common/mathutil.h" +#include "common/utilities.h" + +namespace gl +{ + +bool ValidateES2TexImageParameters(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)) + { + context->recordError(Error(GL_INVALID_ENUM)); + return false; + } + + if (!ValidImageSize(context, target, level, width, height, 1)) + { + context->recordError(Error(GL_INVALID_VALUE)); + return false; + } + + if (level < 0 || xoffset < 0 || + std::numeric_limits<GLsizei>::max() - xoffset < width || + std::numeric_limits<GLsizei>::max() - yoffset < height) + { + context->recordError(Error(GL_INVALID_VALUE)); + return false; + } + + if (!isSubImage && !isCompressed && internalformat != format) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + + const gl::Caps &caps = context->getCaps(); + + if (target == GL_TEXTURE_2D) + { + if (static_cast<GLuint>(width) > (caps.max2DTextureSize >> level) || + static_cast<GLuint>(height) > (caps.max2DTextureSize >> level)) + { + context->recordError(Error(GL_INVALID_VALUE)); + return false; + } + } + else if (IsCubeMapTextureTarget(target)) + { + if (!isSubImage && width != height) + { + context->recordError(Error(GL_INVALID_VALUE)); + return false; + } + + if (static_cast<GLuint>(width) > (caps.maxCubeMapTextureSize >> level) || + static_cast<GLuint>(height) > (caps.maxCubeMapTextureSize >> level)) + { + context->recordError(Error(GL_INVALID_VALUE)); + return false; + } + } + else + { + context->recordError(Error(GL_INVALID_ENUM)); + return false; + } + + gl::Texture *texture = context->getTargetTexture(IsCubeMapTextureTarget(target) ? GL_TEXTURE_CUBE_MAP : target); + if (!texture) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + + if (isSubImage) + { + if (format != GL_NONE) + { + if (gl::GetSizedInternalFormat(format, type) != texture->getInternalFormat(target, level)) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + } + + if (static_cast<size_t>(xoffset + width) > texture->getWidth(target, level) || + static_cast<size_t>(yoffset + height) > texture->getHeight(target, level)) + { + context->recordError(Error(GL_INVALID_VALUE)); + return false; + } + } + else + { + if (texture->isImmutable()) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + } + + // Verify zero border + if (border != 0) + { + context->recordError(Error(GL_INVALID_VALUE)); + return false; + } + + GLenum actualInternalFormat = isSubImage ? texture->getInternalFormat(target, level) : internalformat; + const InternalFormat &actualFormatInfo = GetInternalFormatInfo(actualInternalFormat); + + if (isCompressed != actualFormatInfo.compressed) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + + if (isCompressed) + { + if (!ValidCompressedImageSize(context, actualInternalFormat, width, height)) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + + switch (actualInternalFormat) + { + case GL_COMPRESSED_RGB_S3TC_DXT1_EXT: + case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT: + if (!context->getExtensions().textureCompressionDXT1) + { + context->recordError(Error(GL_INVALID_ENUM)); + return false; + } + break; + case GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE: + if (!context->getExtensions().textureCompressionDXT1) + { + context->recordError(Error(GL_INVALID_ENUM)); + return false; + } + break; + case GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE: + if (!context->getExtensions().textureCompressionDXT5) + { + context->recordError(Error(GL_INVALID_ENUM)); + return false; + } + break; + default: + context->recordError(Error(GL_INVALID_ENUM)); + return 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: + context->recordError(Error(GL_INVALID_ENUM)); + return 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: + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + break; + case GL_RED: + case GL_RG: + if (!context->getExtensions().textureRG) + { + context->recordError(Error(GL_INVALID_ENUM)); + return false; + } + switch (type) + { + case GL_UNSIGNED_BYTE: + case GL_FLOAT: + case GL_HALF_FLOAT_OES: + break; + default: + context->recordError(Error(GL_INVALID_OPERATION)); + return 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: + context->recordError(Error(GL_INVALID_OPERATION)); + return 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: + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + break; + case GL_BGRA_EXT: + switch (type) + { + case GL_UNSIGNED_BYTE: + break; + default: + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + break; + case GL_SRGB_EXT: + case GL_SRGB_ALPHA_EXT: + if (!context->getExtensions().sRGB) + { + context->recordError(Error(GL_INVALID_ENUM)); + return false; + } + switch (type) + { + case GL_UNSIGNED_BYTE: + break; + default: + context->recordError(Error(GL_INVALID_OPERATION)); + return 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: + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + break; + case GL_DEPTH_STENCIL_OES: + switch (type) + { + case GL_UNSIGNED_INT_24_8_OES: + break; + default: + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + break; + default: + context->recordError(Error(GL_INVALID_ENUM)); + return false; + } + + switch (format) + { + case GL_COMPRESSED_RGB_S3TC_DXT1_EXT: + case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT: + if (context->getExtensions().textureCompressionDXT1) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + else + { + context->recordError(Error(GL_INVALID_ENUM)); + return false; + } + break; + case GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE: + if (context->getExtensions().textureCompressionDXT3) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + else + { + context->recordError(Error(GL_INVALID_ENUM)); + return false; + } + break; + case GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE: + if (context->getExtensions().textureCompressionDXT5) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + else + { + context->recordError(Error(GL_INVALID_ENUM)); + return false; + } + break; + case GL_DEPTH_COMPONENT: + case GL_DEPTH_STENCIL_OES: + if (!context->getExtensions().depthTextures) + { + context->recordError(Error(GL_INVALID_VALUE)); + return false; + } + if (target != GL_TEXTURE_2D) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + // OES_depth_texture supports loading depth data and multiple levels, + // but ANGLE_depth_texture does not + if (pixels != NULL || level != 0) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + break; + default: + break; + } + + if (type == GL_FLOAT) + { + if (!context->getExtensions().textureFloat) + { + context->recordError(Error(GL_INVALID_ENUM)); + return false; + } + } + else if (type == GL_HALF_FLOAT_OES) + { + if (!context->getExtensions().textureHalfFloat) + { + context->recordError(Error(GL_INVALID_ENUM)); + return false; + } + } + } + + return true; +} + + + +bool ValidateES2CopyTexImageParameters(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(); + const auto &internalFormatInfo = gl::GetInternalFormatInfo(textureInternalFormat); + GLenum textureFormat = internalFormatInfo.format; + + // [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) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return 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) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return 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 && + colorbufferFormat != GL_R32F && + colorbufferFormat != GL_RG32F && + colorbufferFormat != GL_RGB32F && + colorbufferFormat != GL_RGBA32F) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return 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 && + colorbufferFormat != GL_RG32F && + colorbufferFormat != GL_RGB32F && + colorbufferFormat != GL_RGBA32F) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + break; + case GL_RGB: + if (colorbufferFormat != GL_RGB565 && + colorbufferFormat != GL_RGB8_OES && + colorbufferFormat != GL_RGBA4 && + colorbufferFormat != GL_RGB5_A1 && + colorbufferFormat != GL_RGBA8_OES && + colorbufferFormat != GL_RGB32F && + colorbufferFormat != GL_RGBA32F) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + break; + case GL_LUMINANCE_ALPHA: + case GL_RGBA: + if (colorbufferFormat != GL_RGBA4 && + colorbufferFormat != GL_RGB5_A1 && + colorbufferFormat != GL_RGBA8_OES && + colorbufferFormat != GL_RGBA32F) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return 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: + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + case GL_DEPTH_COMPONENT: + case GL_DEPTH_STENCIL_OES: + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + default: + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + + if (internalFormatInfo.type == GL_FLOAT && + !context->getExtensions().textureFloat) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return 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 && + colorbufferFormat != GL_BGR5_A1_ANGLEX) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return 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 && + colorbufferFormat != GL_BGR5_A1_ANGLEX) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return 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 && + colorbufferFormat != GL_BGR5_A1_ANGLEX) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return 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 && + colorbufferFormat != GL_BGR5_A1_ANGLEX) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return 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 && + colorbufferFormat != GL_BGR5_A1_ANGLEX) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return 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 && + colorbufferFormat != GL_BGR5_A1_ANGLEX) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + break; + case GL_COMPRESSED_RGB_S3TC_DXT1_EXT: + case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT: + if (context->getExtensions().textureCompressionDXT1) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + else + { + context->recordError(Error(GL_INVALID_ENUM)); + return false; + } + break; + case GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE: + if (context->getExtensions().textureCompressionDXT3) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + else + { + context->recordError(Error(GL_INVALID_ENUM)); + return false; + } + break; + case GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE: + if (context->getExtensions().textureCompressionDXT5) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + else + { + context->recordError(Error(GL_INVALID_ENUM)); + return 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) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + else + { + context->recordError(Error(GL_INVALID_ENUM)); + return false; + } + default: + context->recordError(Error(GL_INVALID_ENUM)); + return 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(Context *context, GLenum target, GLsizei levels, GLenum internalformat, + GLsizei width, GLsizei height) +{ + if (target != GL_TEXTURE_2D && target != GL_TEXTURE_CUBE_MAP) + { + context->recordError(Error(GL_INVALID_ENUM)); + return false; + } + + if (width < 1 || height < 1 || levels < 1) + { + context->recordError(Error(GL_INVALID_VALUE)); + return false; + } + + if (target == GL_TEXTURE_CUBE_MAP && width != height) + { + context->recordError(Error(GL_INVALID_VALUE)); + return false; + } + + if (levels != 1 && levels != gl::log2(std::max(width, height)) + 1) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + + const gl::InternalFormat &formatInfo = gl::GetInternalFormatInfo(internalformat); + if (formatInfo.format == GL_NONE || formatInfo.type == GL_NONE) + { + context->recordError(Error(GL_INVALID_ENUM)); + return 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) + { + context->recordError(Error(GL_INVALID_VALUE)); + return false; + } + break; + case GL_TEXTURE_CUBE_MAP: + if (static_cast<GLuint>(width) > caps.maxCubeMapTextureSize || + static_cast<GLuint>(height) > caps.maxCubeMapTextureSize) + { + context->recordError(Error(GL_INVALID_VALUE)); + return false; + } + break; + default: + context->recordError(Error(GL_INVALID_ENUM)); + return false; + } + + if (levels != 1 && !context->getExtensions().textureNPOT) + { + if (!gl::isPow2(width) || !gl::isPow2(height)) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + } + + switch (internalformat) + { + case GL_COMPRESSED_RGB_S3TC_DXT1_EXT: + case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT: + if (!context->getExtensions().textureCompressionDXT1) + { + context->recordError(Error(GL_INVALID_ENUM)); + return false; + } + break; + case GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE: + if (!context->getExtensions().textureCompressionDXT3) + { + context->recordError(Error(GL_INVALID_ENUM)); + return false; + } + break; + case GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE: + if (!context->getExtensions().textureCompressionDXT5) + { + context->recordError(Error(GL_INVALID_ENUM)); + return 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) + { + context->recordError(Error(GL_INVALID_ENUM)); + return 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) + { + context->recordError(Error(GL_INVALID_ENUM)); + return 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) + { + context->recordError(Error(GL_INVALID_ENUM)); + return false; + } + break; + case GL_DEPTH_COMPONENT16: + case GL_DEPTH_COMPONENT32_OES: + case GL_DEPTH24_STENCIL8_OES: + if (!context->getExtensions().depthTextures) + { + context->recordError(Error(GL_INVALID_ENUM)); + return false; + } + if (target != GL_TEXTURE_2D) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + // ANGLE_depth_texture only supports 1-level textures + if (levels != 1) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + break; + default: + break; + } + + gl::Texture *texture = context->getTargetTexture(target); + if (!texture || texture->id() == 0) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + + if (texture->isImmutable()) + { + context->recordError(Error(GL_INVALID_OPERATION)); + return false; + } + + return true; +} + +// check for combinations of format and type that are valid for ReadPixels +bool ValidES2ReadFormatType(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; +} + +} |