diff options
Diffstat (limited to 'gfx/angle/src/libANGLE/validationES2.cpp')
| -rwxr-xr-x | gfx/angle/src/libANGLE/validationES2.cpp | 3867 |
1 files changed, 3867 insertions, 0 deletions
diff --git a/gfx/angle/src/libANGLE/validationES2.cpp b/gfx/angle/src/libANGLE/validationES2.cpp new file mode 100755 index 000000000..3133102f3 --- /dev/null +++ b/gfx/angle/src/libANGLE/validationES2.cpp @@ -0,0 +1,3867 @@ +// +// 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 <cstdint> + +#include "common/mathutil.h" +#include "common/string_utils.h" +#include "common/utilities.h" +#include "libANGLE/Context.h" +#include "libANGLE/Texture.h" +#include "libANGLE/Framebuffer.h" +#include "libANGLE/FramebufferAttachment.h" +#include "libANGLE/Renderbuffer.h" +#include "libANGLE/Shader.h" +#include "libANGLE/Uniform.h" +#include "libANGLE/formatutils.h" +#include "libANGLE/validationES.h" +#include "libANGLE/validationES3.h" + +namespace gl +{ + +namespace +{ + +bool IsPartialBlit(gl::Context *context, + const FramebufferAttachment *readBuffer, + const FramebufferAttachment *writeBuffer, + GLint srcX0, + GLint srcY0, + GLint srcX1, + GLint srcY1, + GLint dstX0, + GLint dstY0, + GLint dstX1, + GLint dstY1) +{ + const Extents &writeSize = writeBuffer->getSize(); + const Extents &readSize = readBuffer->getSize(); + + if (srcX0 != 0 || srcY0 != 0 || dstX0 != 0 || dstY0 != 0 || dstX1 != writeSize.width || + dstY1 != writeSize.height || srcX1 != readSize.width || srcY1 != readSize.height) + { + return true; + } + + if (context->getGLState().isScissorTestEnabled()) + { + const Rectangle &scissor = context->getGLState().getScissor(); + return scissor.x > 0 || scissor.y > 0 || scissor.width < writeSize.width || + scissor.height < writeSize.height; + } + + return false; +} + +template <typename T> +bool ValidatePathInstances(gl::Context *context, + GLsizei numPaths, + const void *paths, + GLuint pathBase) +{ + const auto *array = static_cast<const T *>(paths); + + for (GLsizei i = 0; i < numPaths; ++i) + { + const GLuint pathName = array[i] + pathBase; + if (context->hasPath(pathName) && !context->hasPathData(pathName)) + { + context->handleError(gl::Error(GL_INVALID_OPERATION, "No such path object.")); + return false; + } + } + return true; +} + +bool ValidateInstancedPathParameters(gl::Context *context, + GLsizei numPaths, + GLenum pathNameType, + const void *paths, + GLuint pathBase, + GLenum transformType, + const GLfloat *transformValues) +{ + if (!context->getExtensions().pathRendering) + { + context->handleError( + gl::Error(GL_INVALID_OPERATION, "GL_CHROMIUM_path_rendering is not available.")); + return false; + } + + if (paths == nullptr) + { + context->handleError(gl::Error(GL_INVALID_VALUE, "No path name array.")); + return false; + } + + if (numPaths < 0) + { + context->handleError(gl::Error(GL_INVALID_VALUE, "Invalid (negative) numPaths.")); + return false; + } + + if (!angle::IsValueInRangeForNumericType<std::uint32_t>(numPaths)) + { + context->handleError(gl::Error(GL_INVALID_OPERATION, "Overflow in numPaths.")); + return false; + } + + std::uint32_t pathNameTypeSize = 0; + std::uint32_t componentCount = 0; + + switch (pathNameType) + { + case GL_UNSIGNED_BYTE: + pathNameTypeSize = sizeof(GLubyte); + if (!ValidatePathInstances<GLubyte>(context, numPaths, paths, pathBase)) + return false; + break; + + case GL_BYTE: + pathNameTypeSize = sizeof(GLbyte); + if (!ValidatePathInstances<GLbyte>(context, numPaths, paths, pathBase)) + return false; + break; + + case GL_UNSIGNED_SHORT: + pathNameTypeSize = sizeof(GLushort); + if (!ValidatePathInstances<GLushort>(context, numPaths, paths, pathBase)) + return false; + break; + + case GL_SHORT: + pathNameTypeSize = sizeof(GLshort); + if (!ValidatePathInstances<GLshort>(context, numPaths, paths, pathBase)) + return false; + break; + + case GL_UNSIGNED_INT: + pathNameTypeSize = sizeof(GLuint); + if (!ValidatePathInstances<GLuint>(context, numPaths, paths, pathBase)) + return false; + break; + + case GL_INT: + pathNameTypeSize = sizeof(GLint); + if (!ValidatePathInstances<GLint>(context, numPaths, paths, pathBase)) + return false; + break; + + default: + context->handleError(gl::Error(GL_INVALID_ENUM, "Invalid path name type.")); + return false; + } + + switch (transformType) + { + case GL_NONE: + componentCount = 0; + break; + case GL_TRANSLATE_X_CHROMIUM: + case GL_TRANSLATE_Y_CHROMIUM: + componentCount = 1; + break; + case GL_TRANSLATE_2D_CHROMIUM: + componentCount = 2; + break; + case GL_TRANSLATE_3D_CHROMIUM: + componentCount = 3; + break; + case GL_AFFINE_2D_CHROMIUM: + case GL_TRANSPOSE_AFFINE_2D_CHROMIUM: + componentCount = 6; + break; + case GL_AFFINE_3D_CHROMIUM: + case GL_TRANSPOSE_AFFINE_3D_CHROMIUM: + componentCount = 12; + break; + default: + context->handleError(gl::Error(GL_INVALID_ENUM, "Invalid transformation.")); + return false; + } + if (componentCount != 0 && transformValues == nullptr) + { + context->handleError(gl::Error(GL_INVALID_VALUE, "No transform array given.")); + return false; + } + + angle::CheckedNumeric<std::uint32_t> checkedSize(0); + checkedSize += (numPaths * pathNameTypeSize); + checkedSize += (numPaths * sizeof(GLfloat) * componentCount); + if (!checkedSize.IsValid()) + { + context->handleError(gl::Error(GL_INVALID_OPERATION, "Overflow in num paths.")); + return false; + } + + return true; +} + +bool IsValidCopyTextureFormat(Context *context, GLenum internalFormat) +{ + const InternalFormat &internalFormatInfo = GetInternalFormatInfo(internalFormat); + switch (internalFormatInfo.format) + { + case GL_ALPHA: + case GL_LUMINANCE: + case GL_LUMINANCE_ALPHA: + case GL_RGB: + case GL_RGBA: + return true; + + case GL_RED: + return context->getClientMajorVersion() >= 3 || context->getExtensions().textureRG; + + case GL_BGRA_EXT: + return context->getExtensions().textureFormatBGRA8888; + + default: + return false; + } +} + +bool IsValidCopyTextureDestinationFormatType(Context *context, GLint internalFormat, GLenum type) +{ + switch (internalFormat) + { + case GL_RGB: + case GL_RGBA: + break; + + case GL_BGRA_EXT: + return context->getExtensions().textureFormatBGRA8888; + + default: + return false; + } + + switch (type) + { + case GL_UNSIGNED_BYTE: + break; + + default: + return false; + } + + return true; +} + +bool IsValidCopyTextureDestinationTarget(Context *context, GLenum target) +{ + switch (target) + { + case GL_TEXTURE_2D: + return true; + + // TODO(geofflang): accept GL_TEXTURE_RECTANGLE_ARB if the texture_rectangle extension is + // supported + + default: + return false; + } +} + +bool IsValidCopyTextureSourceTarget(Context *context, GLenum target) +{ + if (IsValidCopyTextureDestinationTarget(context, target)) + { + return true; + } + + // TODO(geofflang): accept GL_TEXTURE_EXTERNAL_OES if the texture_external extension is + // supported + + return false; +} + +} // anonymous namespace + +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, + GLsizei imageSize, + const GLvoid *pixels) +{ + if (!ValidTexture2DDestinationTarget(context, target)) + { + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + + if (!ValidImageSizeParameters(context, target, level, width, height, 1, isSubImage)) + { + context->handleError(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->handleError(Error(GL_INVALID_VALUE)); + return false; + } + + if (!isSubImage && !isCompressed && internalformat != format) + { + context->handleError(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->handleError(Error(GL_INVALID_VALUE)); + return false; + } + } + else if (IsCubeMapTextureTarget(target)) + { + if (!isSubImage && width != height) + { + context->handleError(Error(GL_INVALID_VALUE)); + return false; + } + + if (static_cast<GLuint>(width) > (caps.maxCubeMapTextureSize >> level) || + static_cast<GLuint>(height) > (caps.maxCubeMapTextureSize >> level)) + { + context->handleError(Error(GL_INVALID_VALUE)); + return false; + } + } + else + { + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + + gl::Texture *texture = context->getTargetTexture(IsCubeMapTextureTarget(target) ? GL_TEXTURE_CUBE_MAP : target); + if (!texture) + { + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + + if (isSubImage) + { + GLenum textureFormat = texture->getFormat(target, level).asSized(); + if (textureFormat == GL_NONE) + { + context->handleError(Error(GL_INVALID_OPERATION, "Texture level does not exist.")); + return false; + } + + if (format != GL_NONE) + { + if (gl::GetSizedInternalFormat(format, type) != textureFormat) + { + context->handleError(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->handleError(Error(GL_INVALID_VALUE)); + return false; + } + } + else + { + if (texture->getImmutableFormat()) + { + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + } + + // Verify zero border + if (border != 0) + { + context->handleError(Error(GL_INVALID_VALUE)); + return false; + } + + if (isCompressed) + { + GLenum actualInternalFormat = + isSubImage ? texture->getFormat(target, level).asSized() : internalformat; + switch (actualInternalFormat) + { + case GL_COMPRESSED_RGB_S3TC_DXT1_EXT: + case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT: + if (!context->getExtensions().textureCompressionDXT1) + { + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + break; + case GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE: + if (!context->getExtensions().textureCompressionDXT1) + { + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + break; + case GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE: + if (!context->getExtensions().textureCompressionDXT5) + { + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + break; + case GL_ETC1_RGB8_OES: + if (!context->getExtensions().compressedETC1RGB8Texture) + { + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + break; + case GL_ETC1_RGB8_LOSSY_DECODE_ANGLE: + if (!context->getExtensions().lossyETCDecode) + { + context->handleError( + Error(GL_INVALID_ENUM, "ANGLE_lossy_etc_decode extension is not supported")); + return false; + } + break; + default: + context->handleError(Error( + GL_INVALID_ENUM, "internalformat is not a supported compressed internal format")); + return false; + } + if (!ValidCompressedImageSize(context, actualInternalFormat, width, height)) + { + context->handleError(Error(GL_INVALID_OPERATION)); + 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->handleError(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->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + break; + case GL_RED: + case GL_RG: + if (!context->getExtensions().textureRG) + { + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + switch (type) + { + case GL_UNSIGNED_BYTE: + case GL_FLOAT: + case GL_HALF_FLOAT_OES: + break; + default: + context->handleError(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->handleError(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->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + break; + case GL_BGRA_EXT: + switch (type) + { + case GL_UNSIGNED_BYTE: + break; + default: + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + break; + case GL_SRGB_EXT: + case GL_SRGB_ALPHA_EXT: + if (!context->getExtensions().sRGB) + { + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + switch (type) + { + case GL_UNSIGNED_BYTE: + break; + default: + context->handleError(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->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + break; + case GL_DEPTH_STENCIL_OES: + switch (type) + { + case GL_UNSIGNED_INT_24_8_OES: + break; + default: + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + break; + default: + context->handleError(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->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + else + { + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + break; + case GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE: + if (context->getExtensions().textureCompressionDXT3) + { + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + else + { + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + break; + case GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE: + if (context->getExtensions().textureCompressionDXT5) + { + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + else + { + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + break; + case GL_ETC1_RGB8_OES: + if (context->getExtensions().compressedETC1RGB8Texture) + { + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + else + { + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + break; + case GL_ETC1_RGB8_LOSSY_DECODE_ANGLE: + if (context->getExtensions().lossyETCDecode) + { + context->handleError( + Error(GL_INVALID_OPERATION, + "ETC1_RGB8_LOSSY_DECODE_ANGLE can't work with this type.")); + return false; + } + else + { + context->handleError( + Error(GL_INVALID_ENUM, "ANGLE_lossy_etc_decode extension is not supported.")); + return false; + } + break; + case GL_DEPTH_COMPONENT: + case GL_DEPTH_STENCIL_OES: + if (!context->getExtensions().depthTextures) + { + context->handleError(Error(GL_INVALID_VALUE)); + return false; + } + if (target != GL_TEXTURE_2D) + { + context->handleError(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->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + break; + default: + break; + } + + if (type == GL_FLOAT) + { + if (!context->getExtensions().textureFloat) + { + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + } + else if (type == GL_HALF_FLOAT_OES) + { + if (!context->getExtensions().textureHalfFloat) + { + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + } + } + + if (!ValidImageDataSize(context, target, width, height, 1, internalformat, type, pixels, + imageSize)) + { + return false; + } + + return true; +} + +bool ValidateES2CopyTexImageParameters(ValidationContext *context, + GLenum target, + GLint level, + GLenum internalformat, + bool isSubImage, + GLint xoffset, + GLint yoffset, + GLint x, + GLint y, + GLsizei width, + GLsizei height, + GLint border) +{ + if (!ValidTexture2DDestinationTarget(context, target)) + { + context->handleError(Error(GL_INVALID_ENUM, "Invalid texture target")); + return false; + } + + Format textureFormat = Format::Invalid(); + if (!ValidateCopyTexImageParametersBase(context, target, level, internalformat, isSubImage, + xoffset, yoffset, 0, x, y, width, height, border, + &textureFormat)) + { + return false; + } + + const gl::Framebuffer *framebuffer = context->getGLState().getReadFramebuffer(); + GLenum colorbufferFormat = framebuffer->getReadColorbuffer()->getFormat().asSized(); + const auto &formatInfo = *textureFormat.info; + + // [OpenGL ES 2.0.24] table 3.9 + if (isSubImage) + { + switch (formatInfo.format) + { + case GL_ALPHA: + if (colorbufferFormat != GL_ALPHA8_EXT && + colorbufferFormat != GL_RGBA4 && + colorbufferFormat != GL_RGB5_A1 && + colorbufferFormat != GL_RGBA8_OES && + colorbufferFormat != GL_BGRA8_EXT) + { + context->handleError(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 && + colorbufferFormat != GL_BGRA8_EXT) + { + context->handleError(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_BGRA8_EXT && + colorbufferFormat != GL_R32F && + colorbufferFormat != GL_RG32F && + colorbufferFormat != GL_RGB32F && + colorbufferFormat != GL_RGBA32F) + { + context->handleError(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_BGRA8_EXT && + colorbufferFormat != GL_RG32F && + colorbufferFormat != GL_RGB32F && + colorbufferFormat != GL_RGBA32F) + { + context->handleError(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_BGRA8_EXT && + colorbufferFormat != GL_RGB32F && + colorbufferFormat != GL_RGBA32F) + { + context->handleError(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_BGRA8_EXT && + colorbufferFormat != GL_RGBA32F) + { + context->handleError(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: + case GL_ETC1_RGB8_OES: + case GL_ETC1_RGB8_LOSSY_DECODE_ANGLE: + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + case GL_DEPTH_COMPONENT: + case GL_DEPTH_STENCIL_OES: + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + default: + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + + if (formatInfo.type == GL_FLOAT && !context->getExtensions().textureFloat) + { + context->handleError(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->handleError(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->handleError(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->handleError(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->handleError(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->handleError(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->handleError(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->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + else + { + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + break; + case GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE: + if (context->getExtensions().textureCompressionDXT3) + { + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + else + { + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + break; + case GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE: + if (context->getExtensions().textureCompressionDXT5) + { + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + else + { + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + break; + case GL_ETC1_RGB8_OES: + if (context->getExtensions().compressedETC1RGB8Texture) + { + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + else + { + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + break; + case GL_ETC1_RGB8_LOSSY_DECODE_ANGLE: + if (context->getExtensions().lossyETCDecode) + { + context->handleError(Error(GL_INVALID_OPERATION, + "ETC1_RGB8_LOSSY_DECODE_ANGLE can't be copied to.")); + return false; + } + else + { + context->handleError( + Error(GL_INVALID_ENUM, "ANGLE_lossy_etc_decode extension is not supported.")); + 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->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + else + { + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + default: + context->handleError(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->handleError(Error(GL_INVALID_ENUM)); + return false; + } + + if (width < 1 || height < 1 || levels < 1) + { + context->handleError(Error(GL_INVALID_VALUE)); + return false; + } + + if (target == GL_TEXTURE_CUBE_MAP && width != height) + { + context->handleError(Error(GL_INVALID_VALUE)); + return false; + } + + if (levels != 1 && levels != gl::log2(std::max(width, height)) + 1) + { + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + + const gl::InternalFormat &formatInfo = gl::GetInternalFormatInfo(internalformat); + if (formatInfo.format == GL_NONE || formatInfo.type == GL_NONE) + { + context->handleError(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->handleError(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->handleError(Error(GL_INVALID_VALUE)); + return false; + } + break; + default: + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + + if (levels != 1 && !context->getExtensions().textureNPOT) + { + if (!gl::isPow2(width) || !gl::isPow2(height)) + { + context->handleError(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->handleError(Error(GL_INVALID_ENUM)); + return false; + } + break; + case GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE: + if (!context->getExtensions().textureCompressionDXT3) + { + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + break; + case GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE: + if (!context->getExtensions().textureCompressionDXT5) + { + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + break; + case GL_ETC1_RGB8_OES: + if (!context->getExtensions().compressedETC1RGB8Texture) + { + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + break; + case GL_ETC1_RGB8_LOSSY_DECODE_ANGLE: + if (!context->getExtensions().lossyETCDecode) + { + context->handleError( + Error(GL_INVALID_ENUM, "ANGLE_lossy_etc_decode extension is not supported.")); + 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->handleError(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->handleError(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->handleError(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->handleError(Error(GL_INVALID_ENUM)); + return false; + } + if (target != GL_TEXTURE_2D) + { + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + // ANGLE_depth_texture only supports 1-level textures + if (levels != 1) + { + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + break; + default: + break; + } + + gl::Texture *texture = context->getTargetTexture(target); + if (!texture || texture->id() == 0) + { + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + + if (texture->getImmutableFormat()) + { + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + + return true; +} + +bool ValidateDiscardFramebufferEXT(Context *context, GLenum target, GLsizei numAttachments, + const GLenum *attachments) +{ + if (!context->getExtensions().discardFramebuffer) + { + context->handleError(Error(GL_INVALID_OPERATION, "Extension not enabled")); + return false; + } + + bool defaultFramebuffer = false; + + switch (target) + { + case GL_FRAMEBUFFER: + defaultFramebuffer = + (context->getGLState().getTargetFramebuffer(GL_FRAMEBUFFER)->id() == 0); + break; + default: + context->handleError(Error(GL_INVALID_ENUM, "Invalid framebuffer target")); + return false; + } + + return ValidateDiscardFramebufferBase(context, target, numAttachments, attachments, defaultFramebuffer); +} + +bool ValidateBindVertexArrayOES(Context *context, GLuint array) +{ + if (!context->getExtensions().vertexArrayObject) + { + context->handleError(Error(GL_INVALID_OPERATION, "Extension not enabled")); + return false; + } + + return ValidateBindVertexArrayBase(context, array); +} + +bool ValidateDeleteVertexArraysOES(Context *context, GLsizei n) +{ + if (!context->getExtensions().vertexArrayObject) + { + context->handleError(Error(GL_INVALID_OPERATION, "Extension not enabled")); + return false; + } + + return ValidateGenOrDelete(context, n); +} + +bool ValidateGenVertexArraysOES(Context *context, GLsizei n) +{ + if (!context->getExtensions().vertexArrayObject) + { + context->handleError(Error(GL_INVALID_OPERATION, "Extension not enabled")); + return false; + } + + return ValidateGenOrDelete(context, n); +} + +bool ValidateIsVertexArrayOES(Context *context) +{ + if (!context->getExtensions().vertexArrayObject) + { + context->handleError(Error(GL_INVALID_OPERATION, "Extension not enabled")); + return false; + } + + return true; +} + +bool ValidateProgramBinaryOES(Context *context, + GLuint program, + GLenum binaryFormat, + const void *binary, + GLint length) +{ + if (!context->getExtensions().getProgramBinary) + { + context->handleError(Error(GL_INVALID_OPERATION, "Extension not enabled")); + return false; + } + + return ValidateProgramBinaryBase(context, program, binaryFormat, binary, length); +} + +bool ValidateGetProgramBinaryOES(Context *context, + GLuint program, + GLsizei bufSize, + GLsizei *length, + GLenum *binaryFormat, + void *binary) +{ + if (!context->getExtensions().getProgramBinary) + { + context->handleError(Error(GL_INVALID_OPERATION, "Extension not enabled")); + return false; + } + + return ValidateGetProgramBinaryBase(context, program, bufSize, length, binaryFormat, binary); +} + +static bool ValidDebugSource(GLenum source, bool mustBeThirdPartyOrApplication) +{ + switch (source) + { + case GL_DEBUG_SOURCE_API: + case GL_DEBUG_SOURCE_SHADER_COMPILER: + case GL_DEBUG_SOURCE_WINDOW_SYSTEM: + case GL_DEBUG_SOURCE_OTHER: + // Only THIRD_PARTY and APPLICATION sources are allowed to be manually inserted + return !mustBeThirdPartyOrApplication; + + case GL_DEBUG_SOURCE_THIRD_PARTY: + case GL_DEBUG_SOURCE_APPLICATION: + return true; + + default: + return false; + } +} + +static bool ValidDebugType(GLenum type) +{ + switch (type) + { + case GL_DEBUG_TYPE_ERROR: + case GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR: + case GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR: + case GL_DEBUG_TYPE_PERFORMANCE: + case GL_DEBUG_TYPE_PORTABILITY: + case GL_DEBUG_TYPE_OTHER: + case GL_DEBUG_TYPE_MARKER: + case GL_DEBUG_TYPE_PUSH_GROUP: + case GL_DEBUG_TYPE_POP_GROUP: + return true; + + default: + return false; + } +} + +static bool ValidDebugSeverity(GLenum severity) +{ + switch (severity) + { + case GL_DEBUG_SEVERITY_HIGH: + case GL_DEBUG_SEVERITY_MEDIUM: + case GL_DEBUG_SEVERITY_LOW: + case GL_DEBUG_SEVERITY_NOTIFICATION: + return true; + + default: + return false; + } +} + +bool ValidateDebugMessageControlKHR(Context *context, + GLenum source, + GLenum type, + GLenum severity, + GLsizei count, + const GLuint *ids, + GLboolean enabled) +{ + if (!context->getExtensions().debug) + { + context->handleError(Error(GL_INVALID_OPERATION, "Extension not enabled")); + return false; + } + + if (!ValidDebugSource(source, false) && source != GL_DONT_CARE) + { + context->handleError(Error(GL_INVALID_ENUM, "Invalid debug source.")); + return false; + } + + if (!ValidDebugType(type) && type != GL_DONT_CARE) + { + context->handleError(Error(GL_INVALID_ENUM, "Invalid debug type.")); + return false; + } + + if (!ValidDebugSeverity(severity) && severity != GL_DONT_CARE) + { + context->handleError(Error(GL_INVALID_ENUM, "Invalid debug severity.")); + return false; + } + + if (count > 0) + { + if (source == GL_DONT_CARE || type == GL_DONT_CARE) + { + context->handleError(Error( + GL_INVALID_OPERATION, + "If count is greater than zero, source and severity cannot be GL_DONT_CARE.")); + return false; + } + + if (severity != GL_DONT_CARE) + { + context->handleError( + Error(GL_INVALID_OPERATION, + "If count is greater than zero, severity must be GL_DONT_CARE.")); + return false; + } + } + + return true; +} + +bool ValidateDebugMessageInsertKHR(Context *context, + GLenum source, + GLenum type, + GLuint id, + GLenum severity, + GLsizei length, + const GLchar *buf) +{ + if (!context->getExtensions().debug) + { + context->handleError(Error(GL_INVALID_OPERATION, "Extension not enabled")); + return false; + } + + if (!context->getGLState().getDebug().isOutputEnabled()) + { + // If the DEBUG_OUTPUT state is disabled calls to DebugMessageInsert are discarded and do + // not generate an error. + return false; + } + + if (!ValidDebugSeverity(severity)) + { + context->handleError(Error(GL_INVALID_ENUM, "Invalid debug severity.")); + return false; + } + + if (!ValidDebugType(type)) + { + context->handleError(Error(GL_INVALID_ENUM, "Invalid debug type.")); + return false; + } + + if (!ValidDebugSource(source, true)) + { + context->handleError(Error(GL_INVALID_ENUM, "Invalid debug source.")); + return false; + } + + size_t messageLength = (length < 0) ? strlen(buf) : length; + if (messageLength > context->getExtensions().maxDebugMessageLength) + { + context->handleError( + Error(GL_INVALID_VALUE, "Message length is larger than GL_MAX_DEBUG_MESSAGE_LENGTH.")); + return false; + } + + return true; +} + +bool ValidateDebugMessageCallbackKHR(Context *context, + GLDEBUGPROCKHR callback, + const void *userParam) +{ + if (!context->getExtensions().debug) + { + context->handleError(Error(GL_INVALID_OPERATION, "Extension not enabled")); + return false; + } + + return true; +} + +bool ValidateGetDebugMessageLogKHR(Context *context, + GLuint count, + GLsizei bufSize, + GLenum *sources, + GLenum *types, + GLuint *ids, + GLenum *severities, + GLsizei *lengths, + GLchar *messageLog) +{ + if (!context->getExtensions().debug) + { + context->handleError(Error(GL_INVALID_OPERATION, "Extension not enabled")); + return false; + } + + if (bufSize < 0 && messageLog != nullptr) + { + context->handleError( + Error(GL_INVALID_VALUE, "bufSize must be positive if messageLog is not null.")); + return false; + } + + return true; +} + +bool ValidatePushDebugGroupKHR(Context *context, + GLenum source, + GLuint id, + GLsizei length, + const GLchar *message) +{ + if (!context->getExtensions().debug) + { + context->handleError(Error(GL_INVALID_OPERATION, "Extension not enabled")); + return false; + } + + if (!ValidDebugSource(source, true)) + { + context->handleError(Error(GL_INVALID_ENUM, "Invalid debug source.")); + return false; + } + + size_t messageLength = (length < 0) ? strlen(message) : length; + if (messageLength > context->getExtensions().maxDebugMessageLength) + { + context->handleError( + Error(GL_INVALID_VALUE, "Message length is larger than GL_MAX_DEBUG_MESSAGE_LENGTH.")); + return false; + } + + size_t currentStackSize = context->getGLState().getDebug().getGroupStackDepth(); + if (currentStackSize >= context->getExtensions().maxDebugGroupStackDepth) + { + context->handleError( + Error(GL_STACK_OVERFLOW, + "Cannot push more than GL_MAX_DEBUG_GROUP_STACK_DEPTH debug groups.")); + return false; + } + + return true; +} + +bool ValidatePopDebugGroupKHR(Context *context) +{ + if (!context->getExtensions().debug) + { + context->handleError(Error(GL_INVALID_OPERATION, "Extension not enabled")); + return false; + } + + size_t currentStackSize = context->getGLState().getDebug().getGroupStackDepth(); + if (currentStackSize <= 1) + { + context->handleError(Error(GL_STACK_UNDERFLOW, "Cannot pop the default debug group.")); + return false; + } + + return true; +} + +static bool ValidateObjectIdentifierAndName(Context *context, GLenum identifier, GLuint name) +{ + switch (identifier) + { + case GL_BUFFER: + if (context->getBuffer(name) == nullptr) + { + context->handleError(Error(GL_INVALID_VALUE, "name is not a valid buffer.")); + return false; + } + return true; + + case GL_SHADER: + if (context->getShader(name) == nullptr) + { + context->handleError(Error(GL_INVALID_VALUE, "name is not a valid shader.")); + return false; + } + return true; + + case GL_PROGRAM: + if (context->getProgram(name) == nullptr) + { + context->handleError(Error(GL_INVALID_VALUE, "name is not a valid program.")); + return false; + } + return true; + + case GL_VERTEX_ARRAY: + if (context->getVertexArray(name) == nullptr) + { + context->handleError(Error(GL_INVALID_VALUE, "name is not a valid vertex array.")); + return false; + } + return true; + + case GL_QUERY: + if (context->getQuery(name) == nullptr) + { + context->handleError(Error(GL_INVALID_VALUE, "name is not a valid query.")); + return false; + } + return true; + + case GL_TRANSFORM_FEEDBACK: + if (context->getTransformFeedback(name) == nullptr) + { + context->handleError( + Error(GL_INVALID_VALUE, "name is not a valid transform feedback.")); + return false; + } + return true; + + case GL_SAMPLER: + if (context->getSampler(name) == nullptr) + { + context->handleError(Error(GL_INVALID_VALUE, "name is not a valid sampler.")); + return false; + } + return true; + + case GL_TEXTURE: + if (context->getTexture(name) == nullptr) + { + context->handleError(Error(GL_INVALID_VALUE, "name is not a valid texture.")); + return false; + } + return true; + + case GL_RENDERBUFFER: + if (context->getRenderbuffer(name) == nullptr) + { + context->handleError(Error(GL_INVALID_VALUE, "name is not a valid renderbuffer.")); + return false; + } + return true; + + case GL_FRAMEBUFFER: + if (context->getFramebuffer(name) == nullptr) + { + context->handleError(Error(GL_INVALID_VALUE, "name is not a valid framebuffer.")); + return false; + } + return true; + + default: + context->handleError(Error(GL_INVALID_ENUM, "Invalid identifier.")); + return false; + } +} + +static bool ValidateLabelLength(Context *context, GLsizei length, const GLchar *label) +{ + size_t labelLength = 0; + + if (length < 0) + { + if (label != nullptr) + { + labelLength = strlen(label); + } + } + else + { + labelLength = static_cast<size_t>(length); + } + + if (labelLength > context->getExtensions().maxLabelLength) + { + context->handleError( + Error(GL_INVALID_VALUE, "Label length is larger than GL_MAX_LABEL_LENGTH.")); + return false; + } + + return true; +} + +bool ValidateObjectLabelKHR(Context *context, + GLenum identifier, + GLuint name, + GLsizei length, + const GLchar *label) +{ + if (!context->getExtensions().debug) + { + context->handleError(Error(GL_INVALID_OPERATION, "Extension not enabled")); + return false; + } + + if (!ValidateObjectIdentifierAndName(context, identifier, name)) + { + return false; + } + + if (!ValidateLabelLength(context, length, label)) + { + return false; + } + + return true; +} + +bool ValidateGetObjectLabelKHR(Context *context, + GLenum identifier, + GLuint name, + GLsizei bufSize, + GLsizei *length, + GLchar *label) +{ + if (!context->getExtensions().debug) + { + context->handleError(Error(GL_INVALID_OPERATION, "Extension not enabled")); + return false; + } + + if (bufSize < 0) + { + context->handleError(Error(GL_INVALID_VALUE, "bufSize cannot be negative.")); + return false; + } + + if (!ValidateObjectIdentifierAndName(context, identifier, name)) + { + return false; + } + + return true; +} + +static bool ValidateObjectPtrName(Context *context, const void *ptr) +{ + if (context->getFenceSync(reinterpret_cast<GLsync>(const_cast<void *>(ptr))) == nullptr) + { + context->handleError(Error(GL_INVALID_VALUE, "name is not a valid sync.")); + return false; + } + + return true; +} + +bool ValidateObjectPtrLabelKHR(Context *context, + const void *ptr, + GLsizei length, + const GLchar *label) +{ + if (!context->getExtensions().debug) + { + context->handleError(Error(GL_INVALID_OPERATION, "Extension not enabled")); + return false; + } + + if (!ValidateObjectPtrName(context, ptr)) + { + return false; + } + + if (!ValidateLabelLength(context, length, label)) + { + return false; + } + + return true; +} + +bool ValidateGetObjectPtrLabelKHR(Context *context, + const void *ptr, + GLsizei bufSize, + GLsizei *length, + GLchar *label) +{ + if (!context->getExtensions().debug) + { + context->handleError(Error(GL_INVALID_OPERATION, "Extension not enabled")); + return false; + } + + if (bufSize < 0) + { + context->handleError(Error(GL_INVALID_VALUE, "bufSize cannot be negative.")); + return false; + } + + if (!ValidateObjectPtrName(context, ptr)) + { + return false; + } + + return true; +} + +bool ValidateGetPointervKHR(Context *context, GLenum pname, void **params) +{ + if (!context->getExtensions().debug) + { + context->handleError(Error(GL_INVALID_OPERATION, "Extension not enabled")); + return false; + } + + // TODO: represent this in Context::getQueryParameterInfo. + switch (pname) + { + case GL_DEBUG_CALLBACK_FUNCTION: + case GL_DEBUG_CALLBACK_USER_PARAM: + break; + + default: + context->handleError(Error(GL_INVALID_ENUM, "Invalid pname.")); + return false; + } + + return true; +} + +bool ValidateBlitFramebufferANGLE(Context *context, + GLint srcX0, + GLint srcY0, + GLint srcX1, + GLint srcY1, + GLint dstX0, + GLint dstY0, + GLint dstX1, + GLint dstY1, + GLbitfield mask, + GLenum filter) +{ + if (!context->getExtensions().framebufferBlit) + { + context->handleError(Error(GL_INVALID_OPERATION, "Blit extension not available.")); + return false; + } + + if (srcX1 - srcX0 != dstX1 - dstX0 || srcY1 - srcY0 != dstY1 - dstY0) + { + // TODO(jmadill): Determine if this should be available on other implementations. + context->handleError(Error( + GL_INVALID_OPERATION, + "Scaling and flipping in BlitFramebufferANGLE not supported by this implementation.")); + return false; + } + + if (filter == GL_LINEAR) + { + context->handleError(Error(GL_INVALID_ENUM, "Linear blit not supported in this extension")); + return false; + } + + Framebuffer *readFramebuffer = context->getGLState().getReadFramebuffer(); + Framebuffer *drawFramebuffer = context->getGLState().getDrawFramebuffer(); + + if (mask & GL_COLOR_BUFFER_BIT) + { + const FramebufferAttachment *readColorAttachment = readFramebuffer->getReadColorbuffer(); + const FramebufferAttachment *drawColorAttachment = drawFramebuffer->getFirstColorbuffer(); + + if (readColorAttachment && drawColorAttachment) + { + if (!(readColorAttachment->type() == GL_TEXTURE && + readColorAttachment->getTextureImageIndex().type == GL_TEXTURE_2D) && + readColorAttachment->type() != GL_RENDERBUFFER && + readColorAttachment->type() != GL_FRAMEBUFFER_DEFAULT) + { + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + + for (size_t drawbufferIdx = 0; + drawbufferIdx < drawFramebuffer->getDrawbufferStateCount(); ++drawbufferIdx) + { + const FramebufferAttachment *attachment = + drawFramebuffer->getDrawBuffer(drawbufferIdx); + if (attachment) + { + if (!(attachment->type() == GL_TEXTURE && + attachment->getTextureImageIndex().type == GL_TEXTURE_2D) && + attachment->type() != GL_RENDERBUFFER && + attachment->type() != GL_FRAMEBUFFER_DEFAULT) + { + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + + // Return an error if the destination formats do not match + if (!Format::SameSized(attachment->getFormat(), + readColorAttachment->getFormat())) + { + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + } + } + + if (readFramebuffer->getSamples(context->getContextState()) != 0 && + IsPartialBlit(context, readColorAttachment, drawColorAttachment, srcX0, srcY0, + srcX1, srcY1, dstX0, dstY0, dstX1, dstY1)) + { + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + } + } + + GLenum masks[] = {GL_DEPTH_BUFFER_BIT, GL_STENCIL_BUFFER_BIT}; + GLenum attachments[] = {GL_DEPTH_ATTACHMENT, GL_STENCIL_ATTACHMENT}; + for (size_t i = 0; i < 2; i++) + { + if (mask & masks[i]) + { + const FramebufferAttachment *readBuffer = + readFramebuffer->getAttachment(attachments[i]); + const FramebufferAttachment *drawBuffer = + drawFramebuffer->getAttachment(attachments[i]); + + if (readBuffer && drawBuffer) + { + if (IsPartialBlit(context, readBuffer, drawBuffer, srcX0, srcY0, srcX1, srcY1, + dstX0, dstY0, dstX1, dstY1)) + { + // only whole-buffer copies are permitted + ERR( + "Only whole-buffer depth and stencil blits are supported by this " + "implementation."); + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + + if (readBuffer->getSamples() != 0 || drawBuffer->getSamples() != 0) + { + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + } + } + } + + return ValidateBlitFramebufferParameters(context, srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, + dstX1, dstY1, mask, filter); +} + +bool ValidateClear(ValidationContext *context, GLbitfield mask) +{ + auto fbo = context->getGLState().getDrawFramebuffer(); + if (fbo->checkStatus(context->getContextState()) != GL_FRAMEBUFFER_COMPLETE) + { + context->handleError(Error(GL_INVALID_FRAMEBUFFER_OPERATION)); + return false; + } + + if ((mask & ~(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT)) != 0) + { + context->handleError(Error(GL_INVALID_VALUE)); + return false; + } + + return true; +} + +bool ValidateDrawBuffersEXT(ValidationContext *context, GLsizei n, const GLenum *bufs) +{ + if (!context->getExtensions().drawBuffers) + { + context->handleError(Error(GL_INVALID_OPERATION, "Extension not supported.")); + return false; + } + + return ValidateDrawBuffersBase(context, n, bufs); +} + +bool ValidateTexImage2D(Context *context, + GLenum target, + GLint level, + GLint internalformat, + GLsizei width, + GLsizei height, + GLint border, + GLenum format, + GLenum type, + const GLvoid *pixels) +{ + if (context->getClientMajorVersion() < 3) + { + return ValidateES2TexImageParameters(context, target, level, internalformat, false, false, + 0, 0, width, height, border, format, type, -1, pixels); + } + + ASSERT(context->getClientMajorVersion() >= 3); + return ValidateES3TexImage2DParameters(context, target, level, internalformat, false, false, 0, + 0, 0, width, height, 1, border, format, type, -1, + pixels); +} + +bool ValidateTexImage2DRobust(Context *context, + GLenum target, + GLint level, + GLint internalformat, + GLsizei width, + GLsizei height, + GLint border, + GLenum format, + GLenum type, + GLsizei bufSize, + const GLvoid *pixels) +{ + if (!ValidateRobustEntryPoint(context, bufSize)) + { + return false; + } + + if (context->getClientMajorVersion() < 3) + { + return ValidateES2TexImageParameters(context, target, level, internalformat, false, false, + 0, 0, width, height, border, format, type, bufSize, + pixels); + } + + ASSERT(context->getClientMajorVersion() >= 3); + return ValidateES3TexImage2DParameters(context, target, level, internalformat, false, false, 0, + 0, 0, width, height, 1, border, format, type, bufSize, + pixels); +} + +bool ValidateTexSubImage2D(Context *context, + GLenum target, + GLint level, + GLint xoffset, + GLint yoffset, + GLsizei width, + GLsizei height, + GLenum format, + GLenum type, + const GLvoid *pixels) +{ + + if (context->getClientMajorVersion() < 3) + { + return ValidateES2TexImageParameters(context, target, level, GL_NONE, false, true, xoffset, + yoffset, width, height, 0, format, type, -1, pixels); + } + + ASSERT(context->getClientMajorVersion() >= 3); + return ValidateES3TexImage2DParameters(context, target, level, GL_NONE, false, true, xoffset, + yoffset, 0, width, height, 1, 0, format, type, -1, + pixels); +} + +bool ValidateTexSubImage2DRobustANGLE(Context *context, + GLenum target, + GLint level, + GLint xoffset, + GLint yoffset, + GLsizei width, + GLsizei height, + GLenum format, + GLenum type, + GLsizei bufSize, + const GLvoid *pixels) +{ + if (!ValidateRobustEntryPoint(context, bufSize)) + { + return false; + } + + if (context->getClientMajorVersion() < 3) + { + return ValidateES2TexImageParameters(context, target, level, GL_NONE, false, true, xoffset, + yoffset, width, height, 0, format, type, bufSize, + pixels); + } + + ASSERT(context->getClientMajorVersion() >= 3); + return ValidateES3TexImage2DParameters(context, target, level, GL_NONE, false, true, xoffset, + yoffset, 0, width, height, 1, 0, format, type, bufSize, + pixels); +} + +bool ValidateCompressedTexImage2D(Context *context, + GLenum target, + GLint level, + GLenum internalformat, + GLsizei width, + GLsizei height, + GLint border, + GLsizei imageSize, + const GLvoid *data) +{ + if (context->getClientMajorVersion() < 3) + { + if (!ValidateES2TexImageParameters(context, target, level, internalformat, true, false, 0, + 0, width, height, border, GL_NONE, GL_NONE, -1, data)) + { + return false; + } + } + else + { + ASSERT(context->getClientMajorVersion() >= 3); + if (!ValidateES3TexImage2DParameters(context, target, level, internalformat, true, false, 0, + 0, 0, width, height, 1, border, GL_NONE, GL_NONE, -1, + data)) + { + return false; + } + } + + const InternalFormat &formatInfo = GetInternalFormatInfo(internalformat); + auto blockSizeOrErr = + formatInfo.computeCompressedImageSize(gl::Extents(width, height, 1)); + if (blockSizeOrErr.isError()) + { + context->handleError(blockSizeOrErr.getError()); + return false; + } + + if (imageSize < 0 || static_cast<GLuint>(imageSize) != blockSizeOrErr.getResult()) + { + context->handleError(Error(GL_INVALID_VALUE)); + return false; + } + + return true; +} + +bool ValidateCompressedTexSubImage2D(Context *context, + GLenum target, + GLint level, + GLint xoffset, + GLint yoffset, + GLsizei width, + GLsizei height, + GLenum format, + GLsizei imageSize, + const GLvoid *data) +{ + if (context->getClientMajorVersion() < 3) + { + if (!ValidateES2TexImageParameters(context, target, level, GL_NONE, true, true, xoffset, + yoffset, width, height, 0, GL_NONE, GL_NONE, -1, data)) + { + return false; + } + } + else + { + ASSERT(context->getClientMajorVersion() >= 3); + if (!ValidateES3TexImage2DParameters(context, target, level, GL_NONE, true, true, xoffset, + yoffset, 0, width, height, 1, 0, GL_NONE, GL_NONE, -1, + data)) + { + return false; + } + } + + const InternalFormat &formatInfo = GetInternalFormatInfo(format); + auto blockSizeOrErr = + formatInfo.computeCompressedImageSize(gl::Extents(width, height, 1)); + if (blockSizeOrErr.isError()) + { + context->handleError(blockSizeOrErr.getError()); + return false; + } + + if (imageSize < 0 || static_cast<GLuint>(imageSize) != blockSizeOrErr.getResult()) + { + context->handleError(Error(GL_INVALID_VALUE)); + return false; + } + + return true; +} + +bool ValidateGetBufferPointervOES(Context *context, GLenum target, GLenum pname, void **params) +{ + return ValidateGetBufferPointervBase(context, target, pname, nullptr, params); +} + +bool ValidateMapBufferOES(Context *context, GLenum target, GLenum access) +{ + if (!context->getExtensions().mapBuffer) + { + context->handleError(Error(GL_INVALID_OPERATION, "Map buffer extension not available.")); + return false; + } + + if (!ValidBufferTarget(context, target)) + { + context->handleError(Error(GL_INVALID_ENUM, "Invalid buffer target.")); + return false; + } + + Buffer *buffer = context->getGLState().getTargetBuffer(target); + + if (buffer == nullptr) + { + context->handleError(Error(GL_INVALID_OPERATION, "Attempted to map buffer object zero.")); + return false; + } + + if (access != GL_WRITE_ONLY_OES) + { + context->handleError(Error(GL_INVALID_ENUM, "Non-write buffer mapping not supported.")); + return false; + } + + if (buffer->isMapped()) + { + context->handleError(Error(GL_INVALID_OPERATION, "Buffer is already mapped.")); + return false; + } + + return true; +} + +bool ValidateUnmapBufferOES(Context *context, GLenum target) +{ + if (!context->getExtensions().mapBuffer) + { + context->handleError(Error(GL_INVALID_OPERATION, "Map buffer extension not available.")); + return false; + } + + return ValidateUnmapBufferBase(context, target); +} + +bool ValidateMapBufferRangeEXT(Context *context, + GLenum target, + GLintptr offset, + GLsizeiptr length, + GLbitfield access) +{ + if (!context->getExtensions().mapBufferRange) + { + context->handleError( + Error(GL_INVALID_OPERATION, "Map buffer range extension not available.")); + return false; + } + + return ValidateMapBufferRangeBase(context, target, offset, length, access); +} + +bool ValidateFlushMappedBufferRangeEXT(Context *context, + GLenum target, + GLintptr offset, + GLsizeiptr length) +{ + if (!context->getExtensions().mapBufferRange) + { + context->handleError( + Error(GL_INVALID_OPERATION, "Map buffer range extension not available.")); + return false; + } + + return ValidateFlushMappedBufferRangeBase(context, target, offset, length); +} + +bool ValidateBindTexture(Context *context, GLenum target, GLuint texture) +{ + Texture *textureObject = context->getTexture(texture); + if (textureObject && textureObject->getTarget() != target && texture != 0) + { + context->handleError(Error(GL_INVALID_OPERATION, "Invalid texture")); + return false; + } + + if (!context->getGLState().isBindGeneratesResourceEnabled() && + !context->isTextureGenerated(texture)) + { + context->handleError(Error(GL_INVALID_OPERATION, "Texture was not generated")); + return false; + } + + switch (target) + { + case GL_TEXTURE_2D: + case GL_TEXTURE_CUBE_MAP: + break; + + case GL_TEXTURE_3D: + case GL_TEXTURE_2D_ARRAY: + if (context->getClientMajorVersion() < 3) + { + context->handleError(Error(GL_INVALID_ENUM, "GLES 3.0 disabled")); + return false; + } + break; + case GL_TEXTURE_EXTERNAL_OES: + if (!context->getExtensions().eglImageExternal && + !context->getExtensions().eglStreamConsumerExternal) + { + context->handleError( + Error(GL_INVALID_ENUM, "External texture extension not enabled")); + return false; + } + break; + default: + context->handleError(Error(GL_INVALID_ENUM, "Invalid target")); + return false; + } + + return true; +} + +bool ValidateBindUniformLocationCHROMIUM(Context *context, + GLuint program, + GLint location, + const GLchar *name) +{ + if (!context->getExtensions().bindUniformLocation) + { + context->handleError( + Error(GL_INVALID_OPERATION, "GL_CHROMIUM_bind_uniform_location is not available.")); + return false; + } + + Program *programObject = GetValidProgram(context, program); + if (!programObject) + { + return false; + } + + if (location < 0) + { + context->handleError(Error(GL_INVALID_VALUE, "Location cannot be less than 0.")); + return false; + } + + const Caps &caps = context->getCaps(); + if (static_cast<size_t>(location) >= + (caps.maxVertexUniformVectors + caps.maxFragmentUniformVectors) * 4) + { + context->handleError(Error(GL_INVALID_VALUE, + "Location must be less than (MAX_VERTEX_UNIFORM_VECTORS + " + "MAX_FRAGMENT_UNIFORM_VECTORS) * 4")); + return false; + } + + if (strncmp(name, "gl_", 3) == 0) + { + context->handleError( + Error(GL_INVALID_OPERATION, "Name cannot start with the reserved \"gl_\" prefix.")); + return false; + } + + return true; +} + +bool ValidateCoverageModulationCHROMIUM(Context *context, GLenum components) +{ + if (!context->getExtensions().framebufferMixedSamples) + { + context->handleError( + Error(GL_INVALID_OPERATION, "GL_CHROMIUM_framebuffer_mixed_samples is not available.")); + return false; + } + switch (components) + { + case GL_RGB: + case GL_RGBA: + case GL_ALPHA: + case GL_NONE: + break; + default: + context->handleError( + Error(GL_INVALID_ENUM, + "GLenum components is not one of GL_RGB, GL_RGBA, GL_ALPHA or GL_NONE.")); + return false; + } + + return true; +} + +// CHROMIUM_path_rendering + +bool ValidateMatrix(Context *context, GLenum matrixMode, const GLfloat *matrix) +{ + if (!context->getExtensions().pathRendering) + { + context->handleError( + Error(GL_INVALID_OPERATION, "GL_CHROMIUM_path_rendering is not available.")); + return false; + } + if (matrixMode != GL_PATH_MODELVIEW_CHROMIUM && matrixMode != GL_PATH_PROJECTION_CHROMIUM) + { + context->handleError(Error(GL_INVALID_ENUM, "Invalid matrix mode.")); + return false; + } + if (matrix == nullptr) + { + context->handleError(Error(GL_INVALID_OPERATION, "Invalid matrix.")); + return false; + } + return true; +} + +bool ValidateMatrixMode(Context *context, GLenum matrixMode) +{ + if (!context->getExtensions().pathRendering) + { + context->handleError( + Error(GL_INVALID_OPERATION, "GL_CHROMIUM_path_rendering is not available.")); + return false; + } + if (matrixMode != GL_PATH_MODELVIEW_CHROMIUM && matrixMode != GL_PATH_PROJECTION_CHROMIUM) + { + context->handleError(Error(GL_INVALID_ENUM, "Invalid matrix mode.")); + return false; + } + return true; +} + +bool ValidateGenPaths(Context *context, GLsizei range) +{ + if (!context->getExtensions().pathRendering) + { + context->handleError( + Error(GL_INVALID_OPERATION, "GL_CHROMIUM_path_rendering is not available.")); + return false; + } + + // range = 0 is undefined in NV_path_rendering. + // we add stricter semantic check here and require a non zero positive range. + if (range <= 0) + { + context->handleError(Error(GL_INVALID_VALUE, "Invalid range.")); + return false; + } + + if (!angle::IsValueInRangeForNumericType<std::uint32_t>(range)) + { + context->handleError(Error(GL_INVALID_OPERATION, "Range overflow.")); + return false; + } + + return true; +} + +bool ValidateDeletePaths(Context *context, GLuint path, GLsizei range) +{ + if (!context->getExtensions().pathRendering) + { + context->handleError( + Error(GL_INVALID_OPERATION, "GL_CHROMIUM_path_rendering is not available.")); + return false; + } + + // range = 0 is undefined in NV_path_rendering. + // we add stricter semantic check here and require a non zero positive range. + if (range <= 0) + { + context->handleError(Error(GL_INVALID_VALUE, "Invalid range.")); + return false; + } + + angle::CheckedNumeric<std::uint32_t> checkedRange(path); + checkedRange += range; + + if (!angle::IsValueInRangeForNumericType<std::uint32_t>(range) || !checkedRange.IsValid()) + { + context->handleError(Error(GL_INVALID_OPERATION, "Range overflow.")); + return false; + } + return true; +} + +bool ValidatePathCommands(Context *context, + GLuint path, + GLsizei numCommands, + const GLubyte *commands, + GLsizei numCoords, + GLenum coordType, + const void *coords) +{ + if (!context->getExtensions().pathRendering) + { + context->handleError( + Error(GL_INVALID_OPERATION, "GL_CHROMIUM_path_rendering is not available.")); + return false; + } + if (!context->hasPath(path)) + { + context->handleError(Error(GL_INVALID_OPERATION, "No such path object.")); + return false; + } + + if (numCommands < 0) + { + context->handleError(Error(GL_INVALID_VALUE, "Invalid number of commands.")); + return false; + } + else if (numCommands > 0) + { + if (!commands) + { + context->handleError(Error(GL_INVALID_VALUE, "No commands array given.")); + return false; + } + } + + if (numCoords < 0) + { + context->handleError(Error(GL_INVALID_VALUE, "Invalid number of coordinates.")); + return false; + } + else if (numCoords > 0) + { + if (!coords) + { + context->handleError(Error(GL_INVALID_VALUE, "No coordinate array given.")); + return false; + } + } + + std::uint32_t coordTypeSize = 0; + switch (coordType) + { + case GL_BYTE: + coordTypeSize = sizeof(GLbyte); + break; + + case GL_UNSIGNED_BYTE: + coordTypeSize = sizeof(GLubyte); + break; + + case GL_SHORT: + coordTypeSize = sizeof(GLshort); + break; + + case GL_UNSIGNED_SHORT: + coordTypeSize = sizeof(GLushort); + break; + + case GL_FLOAT: + coordTypeSize = sizeof(GLfloat); + break; + + default: + context->handleError(Error(GL_INVALID_ENUM, "Invalid coordinate type.")); + return false; + } + + angle::CheckedNumeric<std::uint32_t> checkedSize(numCommands); + checkedSize += (coordTypeSize * numCoords); + if (!checkedSize.IsValid()) + { + context->handleError(Error(GL_INVALID_OPERATION, "Coord size overflow.")); + return false; + } + + // early return skips command data validation when it doesn't exist. + if (!commands) + return true; + + GLsizei expectedNumCoords = 0; + for (GLsizei i = 0; i < numCommands; ++i) + { + switch (commands[i]) + { + case GL_CLOSE_PATH_CHROMIUM: // no coordinates. + break; + case GL_MOVE_TO_CHROMIUM: + case GL_LINE_TO_CHROMIUM: + expectedNumCoords += 2; + break; + case GL_QUADRATIC_CURVE_TO_CHROMIUM: + expectedNumCoords += 4; + break; + case GL_CUBIC_CURVE_TO_CHROMIUM: + expectedNumCoords += 6; + break; + case GL_CONIC_CURVE_TO_CHROMIUM: + expectedNumCoords += 5; + break; + default: + context->handleError(Error(GL_INVALID_ENUM, "Invalid command.")); + return false; + } + } + if (expectedNumCoords != numCoords) + { + context->handleError(Error(GL_INVALID_VALUE, "Invalid number of coordinates.")); + return false; + } + + return true; +} + +bool ValidateSetPathParameter(Context *context, GLuint path, GLenum pname, GLfloat value) +{ + if (!context->getExtensions().pathRendering) + { + context->handleError( + Error(GL_INVALID_OPERATION, "GL_CHROMIUM_path_rendering is not available.")); + return false; + } + if (!context->hasPath(path)) + { + context->handleError(Error(GL_INVALID_OPERATION, "No such path object.")); + return false; + } + + switch (pname) + { + case GL_PATH_STROKE_WIDTH_CHROMIUM: + if (value < 0.0f) + { + context->handleError(Error(GL_INVALID_VALUE, "Invalid stroke width.")); + return false; + } + break; + case GL_PATH_END_CAPS_CHROMIUM: + switch (static_cast<GLenum>(value)) + { + case GL_FLAT_CHROMIUM: + case GL_SQUARE_CHROMIUM: + case GL_ROUND_CHROMIUM: + break; + default: + context->handleError(Error(GL_INVALID_ENUM, "Invalid end caps.")); + return false; + } + break; + case GL_PATH_JOIN_STYLE_CHROMIUM: + switch (static_cast<GLenum>(value)) + { + case GL_MITER_REVERT_CHROMIUM: + case GL_BEVEL_CHROMIUM: + case GL_ROUND_CHROMIUM: + break; + default: + context->handleError(Error(GL_INVALID_ENUM, "Invalid join style.")); + return false; + } + case GL_PATH_MITER_LIMIT_CHROMIUM: + if (value < 0.0f) + { + context->handleError(Error(GL_INVALID_VALUE, "Invalid miter limit.")); + return false; + } + break; + + case GL_PATH_STROKE_BOUND_CHROMIUM: + // no errors, only clamping. + break; + + default: + context->handleError(Error(GL_INVALID_ENUM, "Invalid path parameter.")); + return false; + } + return true; +} + +bool ValidateGetPathParameter(Context *context, GLuint path, GLenum pname, GLfloat *value) +{ + if (!context->getExtensions().pathRendering) + { + context->handleError( + Error(GL_INVALID_OPERATION, "GL_CHROMIUM_path_rendering is not available.")); + return false; + } + + if (!context->hasPath(path)) + { + context->handleError(Error(GL_INVALID_OPERATION, "No such path object.")); + return false; + } + if (!value) + { + context->handleError(Error(GL_INVALID_VALUE, "No value array.")); + return false; + } + + switch (pname) + { + case GL_PATH_STROKE_WIDTH_CHROMIUM: + case GL_PATH_END_CAPS_CHROMIUM: + case GL_PATH_JOIN_STYLE_CHROMIUM: + case GL_PATH_MITER_LIMIT_CHROMIUM: + case GL_PATH_STROKE_BOUND_CHROMIUM: + break; + + default: + context->handleError(Error(GL_INVALID_ENUM, "Invalid path parameter.")); + return false; + } + + return true; +} + +bool ValidatePathStencilFunc(Context *context, GLenum func, GLint ref, GLuint mask) +{ + if (!context->getExtensions().pathRendering) + { + context->handleError( + Error(GL_INVALID_OPERATION, "GL_CHROMIUM_path_rendering is not available.")); + return false; + } + + switch (func) + { + case GL_NEVER: + case GL_ALWAYS: + case GL_LESS: + case GL_LEQUAL: + case GL_EQUAL: + case GL_GEQUAL: + case GL_GREATER: + case GL_NOTEQUAL: + break; + default: + context->handleError(Error(GL_INVALID_ENUM, "Invalid stencil function.")); + return false; + } + + return true; +} + +// Note that the spec specifies that for the path drawing commands +// if the path object is not an existing path object the command +// does nothing and no error is generated. +// However if the path object exists but has not been specified any +// commands then an error is generated. + +bool ValidateStencilFillPath(Context *context, GLuint path, GLenum fillMode, GLuint mask) +{ + if (!context->getExtensions().pathRendering) + { + context->handleError( + Error(GL_INVALID_OPERATION, "GL_CHROMIUM_path_rendering is not available.")); + return false; + } + if (context->hasPath(path) && !context->hasPathData(path)) + { + context->handleError(Error(GL_INVALID_OPERATION, "No such path object.")); + return false; + } + + switch (fillMode) + { + case GL_COUNT_UP_CHROMIUM: + case GL_COUNT_DOWN_CHROMIUM: + break; + default: + context->handleError(Error(GL_INVALID_ENUM, "Invalid fill mode.")); + return false; + } + + if (!isPow2(mask + 1)) + { + context->handleError(Error(GL_INVALID_VALUE, "Invalid stencil bit mask.")); + return false; + } + + return true; +} + +bool ValidateStencilStrokePath(Context *context, GLuint path, GLint reference, GLuint mask) +{ + if (!context->getExtensions().pathRendering) + { + context->handleError( + Error(GL_INVALID_OPERATION, "GL_CHROMIUM_path_rendering is not available.")); + return false; + } + if (context->hasPath(path) && !context->hasPathData(path)) + { + context->handleError(Error(GL_INVALID_OPERATION, "No such path or path has no data.")); + return false; + } + + return true; +} + +bool ValidateCoverPath(Context *context, GLuint path, GLenum coverMode) +{ + if (!context->getExtensions().pathRendering) + { + context->handleError( + Error(GL_INVALID_OPERATION, "GL_CHROMIUM_path_rendering is not available.")); + return false; + } + if (context->hasPath(path) && !context->hasPathData(path)) + { + context->handleError(Error(GL_INVALID_OPERATION, "No such path object.")); + return false; + } + + switch (coverMode) + { + case GL_CONVEX_HULL_CHROMIUM: + case GL_BOUNDING_BOX_CHROMIUM: + break; + default: + context->handleError(Error(GL_INVALID_ENUM, "Invalid cover mode.")); + return false; + } + return true; +} + +bool ValidateStencilThenCoverFillPath(Context *context, + GLuint path, + GLenum fillMode, + GLuint mask, + GLenum coverMode) +{ + return ValidateStencilFillPath(context, path, fillMode, mask) && + ValidateCoverPath(context, path, coverMode); +} + +bool ValidateStencilThenCoverStrokePath(Context *context, + GLuint path, + GLint reference, + GLuint mask, + GLenum coverMode) +{ + return ValidateStencilStrokePath(context, path, reference, mask) && + ValidateCoverPath(context, path, coverMode); +} + +bool ValidateIsPath(Context *context) +{ + if (!context->getExtensions().pathRendering) + { + context->handleError( + Error(GL_INVALID_OPERATION, "GL_CHROMIUM_path_rendering is not available.")); + return false; + } + return true; +} + +bool ValidateCoverFillPathInstanced(Context *context, + GLsizei numPaths, + GLenum pathNameType, + const void *paths, + GLuint pathBase, + GLenum coverMode, + GLenum transformType, + const GLfloat *transformValues) +{ + if (!ValidateInstancedPathParameters(context, numPaths, pathNameType, paths, pathBase, + transformType, transformValues)) + return false; + + switch (coverMode) + { + case GL_CONVEX_HULL_CHROMIUM: + case GL_BOUNDING_BOX_CHROMIUM: + case GL_BOUNDING_BOX_OF_BOUNDING_BOXES_CHROMIUM: + break; + default: + context->handleError(Error(GL_INVALID_ENUM, "Invalid cover mode.")); + return false; + } + + return true; +} + +bool ValidateCoverStrokePathInstanced(Context *context, + GLsizei numPaths, + GLenum pathNameType, + const void *paths, + GLuint pathBase, + GLenum coverMode, + GLenum transformType, + const GLfloat *transformValues) +{ + if (!ValidateInstancedPathParameters(context, numPaths, pathNameType, paths, pathBase, + transformType, transformValues)) + return false; + + switch (coverMode) + { + case GL_CONVEX_HULL_CHROMIUM: + case GL_BOUNDING_BOX_CHROMIUM: + case GL_BOUNDING_BOX_OF_BOUNDING_BOXES_CHROMIUM: + break; + default: + context->handleError(Error(GL_INVALID_ENUM, "Invalid cover mode.")); + return false; + } + + return true; +} + +bool ValidateStencilFillPathInstanced(Context *context, + GLsizei numPaths, + GLenum pathNameType, + const void *paths, + GLuint pathBase, + GLenum fillMode, + GLuint mask, + GLenum transformType, + const GLfloat *transformValues) +{ + + if (!ValidateInstancedPathParameters(context, numPaths, pathNameType, paths, pathBase, + transformType, transformValues)) + return false; + + switch (fillMode) + { + case GL_COUNT_UP_CHROMIUM: + case GL_COUNT_DOWN_CHROMIUM: + break; + default: + context->handleError(Error(GL_INVALID_ENUM, "Invalid fill mode.")); + return false; + } + if (!isPow2(mask + 1)) + { + context->handleError(Error(GL_INVALID_VALUE, "Invalid stencil bit mask.")); + return false; + } + return true; +} + +bool ValidateStencilStrokePathInstanced(Context *context, + GLsizei numPaths, + GLenum pathNameType, + const void *paths, + GLuint pathBase, + GLint reference, + GLuint mask, + GLenum transformType, + const GLfloat *transformValues) +{ + if (!ValidateInstancedPathParameters(context, numPaths, pathNameType, paths, pathBase, + transformType, transformValues)) + return false; + + // no more validation here. + + return true; +} + +bool ValidateStencilThenCoverFillPathInstanced(Context *context, + GLsizei numPaths, + GLenum pathNameType, + const void *paths, + GLuint pathBase, + GLenum fillMode, + GLuint mask, + GLenum coverMode, + GLenum transformType, + const GLfloat *transformValues) +{ + if (!ValidateInstancedPathParameters(context, numPaths, pathNameType, paths, pathBase, + transformType, transformValues)) + return false; + + switch (coverMode) + { + case GL_CONVEX_HULL_CHROMIUM: + case GL_BOUNDING_BOX_CHROMIUM: + case GL_BOUNDING_BOX_OF_BOUNDING_BOXES_CHROMIUM: + break; + default: + context->handleError(Error(GL_INVALID_ENUM, "Invalid cover mode.")); + return false; + } + + switch (fillMode) + { + case GL_COUNT_UP_CHROMIUM: + case GL_COUNT_DOWN_CHROMIUM: + break; + default: + context->handleError(Error(GL_INVALID_ENUM, "Invalid fill mode.")); + return false; + } + if (!isPow2(mask + 1)) + { + context->handleError(Error(GL_INVALID_VALUE, "Invalid stencil bit mask.")); + return false; + } + + return true; +} + +bool ValidateStencilThenCoverStrokePathInstanced(Context *context, + GLsizei numPaths, + GLenum pathNameType, + const void *paths, + GLuint pathBase, + GLint reference, + GLuint mask, + GLenum coverMode, + GLenum transformType, + const GLfloat *transformValues) +{ + if (!ValidateInstancedPathParameters(context, numPaths, pathNameType, paths, pathBase, + transformType, transformValues)) + return false; + + switch (coverMode) + { + case GL_CONVEX_HULL_CHROMIUM: + case GL_BOUNDING_BOX_CHROMIUM: + case GL_BOUNDING_BOX_OF_BOUNDING_BOXES_CHROMIUM: + break; + default: + context->handleError(Error(GL_INVALID_ENUM, "Invalid cover mode.")); + return false; + } + + return true; +} + +bool ValidateBindFragmentInputLocation(Context *context, + GLuint program, + GLint location, + const GLchar *name) +{ + if (!context->getExtensions().pathRendering) + { + context->handleError( + Error(GL_INVALID_OPERATION, "GL_CHROMIUM_path_rendering is not available.")); + return false; + } + + const GLint MaxLocation = context->getCaps().maxVaryingVectors * 4; + if (location >= MaxLocation) + { + context->handleError(Error(GL_INVALID_VALUE, "Location exceeds max varying.")); + return false; + } + + const auto *programObject = context->getProgram(program); + if (!programObject) + { + context->handleError(Error(GL_INVALID_OPERATION, "No such program.")); + return false; + } + + if (!name) + { + context->handleError(Error(GL_INVALID_VALUE, "No name given.")); + return false; + } + + if (angle::BeginsWith(name, "gl_")) + { + context->handleError(Error(GL_INVALID_OPERATION, "Cannot bind a built-in variable.")); + return false; + } + + return true; +} + +bool ValidateProgramPathFragmentInputGen(Context *context, + GLuint program, + GLint location, + GLenum genMode, + GLint components, + const GLfloat *coeffs) +{ + if (!context->getExtensions().pathRendering) + { + context->handleError( + Error(GL_INVALID_OPERATION, "GL_CHROMIUM_path_rendering is not available.")); + return false; + } + + const auto *programObject = context->getProgram(program); + if (!programObject || programObject->isFlaggedForDeletion()) + { + context->handleError(Error(GL_INVALID_OPERATION, "No such program.")); + return false; + } + + if (!programObject->isLinked()) + { + context->handleError(Error(GL_INVALID_OPERATION, "Program is not linked.")); + return false; + } + + switch (genMode) + { + case GL_NONE: + if (components != 0) + { + context->handleError(Error(GL_INVALID_VALUE, "Invalid components.")); + return false; + } + break; + + case GL_OBJECT_LINEAR_CHROMIUM: + case GL_EYE_LINEAR_CHROMIUM: + case GL_CONSTANT_CHROMIUM: + if (components < 1 || components > 4) + { + context->handleError(Error(GL_INVALID_VALUE, "Invalid components.")); + return false; + } + if (!coeffs) + { + context->handleError(Error(GL_INVALID_VALUE, "No coefficients array given.")); + return false; + } + break; + + default: + context->handleError(Error(GL_INVALID_ENUM, "Invalid gen mode.")); + return false; + } + + // If the location is -1 then the command is silently ignored + // and no further validation is needed. + if (location == -1) + return true; + + const auto &binding = programObject->getFragmentInputBindingInfo(location); + + if (!binding.valid) + { + context->handleError(Error(GL_INVALID_OPERATION, "No such binding.")); + return false; + } + + if (binding.type != GL_NONE) + { + GLint expectedComponents = 0; + switch (binding.type) + { + case GL_FLOAT: + expectedComponents = 1; + break; + case GL_FLOAT_VEC2: + expectedComponents = 2; + break; + case GL_FLOAT_VEC3: + expectedComponents = 3; + break; + case GL_FLOAT_VEC4: + expectedComponents = 4; + break; + default: + context->handleError(Error(GL_INVALID_OPERATION, + "Fragment input type is not a floating point scalar or vector.")); + return false; + } + if (expectedComponents != components && genMode != GL_NONE) + { + context->handleError(Error(GL_INVALID_OPERATION, "Unexpected number of components")); + return false; + } + } + return true; +} + +bool ValidateCopyTextureCHROMIUM(Context *context, + GLuint sourceId, + GLuint destId, + GLint internalFormat, + GLenum destType, + GLboolean unpackFlipY, + GLboolean unpackPremultiplyAlpha, + GLboolean unpackUnmultiplyAlpha) +{ + if (!context->getExtensions().copyTexture) + { + context->handleError( + Error(GL_INVALID_OPERATION, "GL_CHROMIUM_copy_texture extension not available.")); + return false; + } + + const gl::Texture *source = context->getTexture(sourceId); + if (source == nullptr) + { + context->handleError( + Error(GL_INVALID_VALUE, "Source texture is not a valid texture object.")); + return false; + } + + if (!IsValidCopyTextureSourceTarget(context, source->getTarget())) + { + context->handleError(Error(GL_INVALID_VALUE, "Source texture a valid texture type.")); + return false; + } + + GLenum sourceTarget = source->getTarget(); + ASSERT(sourceTarget != GL_TEXTURE_CUBE_MAP); + if (source->getWidth(sourceTarget, 0) == 0 || source->getHeight(sourceTarget, 0) == 0) + { + context->handleError( + Error(GL_INVALID_VALUE, "Level 0 of the source texture must be defined.")); + return false; + } + + const gl::Format &sourceFormat = source->getFormat(sourceTarget, 0); + if (!IsValidCopyTextureFormat(context, sourceFormat.format)) + { + context->handleError( + Error(GL_INVALID_OPERATION, "Source texture internal format is invalid.")); + return false; + } + + const gl::Texture *dest = context->getTexture(destId); + if (dest == nullptr) + { + context->handleError( + Error(GL_INVALID_VALUE, "Destination texture is not a valid texture object.")); + return false; + } + + if (!IsValidCopyTextureDestinationTarget(context, dest->getTarget())) + { + context->handleError(Error(GL_INVALID_VALUE, "Destination texture a valid texture type.")); + return false; + } + + if (!IsValidCopyTextureDestinationFormatType(context, internalFormat, destType)) + { + context->handleError( + Error(GL_INVALID_OPERATION, + "Destination internal format and type combination is not valid.")); + return false; + } + + if (dest->getImmutableFormat()) + { + context->handleError(Error(GL_INVALID_OPERATION, "Destination texture is immutable.")); + return false; + } + + return true; +} + +bool ValidateCopySubTextureCHROMIUM(Context *context, + GLuint sourceId, + GLuint destId, + GLint xoffset, + GLint yoffset, + GLint x, + GLint y, + GLsizei width, + GLsizei height, + GLboolean unpackFlipY, + GLboolean unpackPremultiplyAlpha, + GLboolean unpackUnmultiplyAlpha) +{ + if (!context->getExtensions().copyTexture) + { + context->handleError( + Error(GL_INVALID_OPERATION, "GL_CHROMIUM_copy_texture extension not available.")); + return false; + } + + const gl::Texture *source = context->getTexture(sourceId); + if (source == nullptr) + { + context->handleError( + Error(GL_INVALID_VALUE, "Source texture is not a valid texture object.")); + return false; + } + + if (!IsValidCopyTextureSourceTarget(context, source->getTarget())) + { + context->handleError(Error(GL_INVALID_VALUE, "Source texture a valid texture type.")); + return false; + } + + GLenum sourceTarget = source->getTarget(); + ASSERT(sourceTarget != GL_TEXTURE_CUBE_MAP); + if (source->getWidth(sourceTarget, 0) == 0 || source->getHeight(sourceTarget, 0) == 0) + { + context->handleError( + Error(GL_INVALID_VALUE, "Level 0 of the source texture must be defined.")); + return false; + } + + if (x < 0 || y < 0) + { + context->handleError(Error(GL_INVALID_VALUE, "x and y cannot be negative.")); + return false; + } + + if (width < 0 || height < 0) + { + context->handleError(Error(GL_INVALID_VALUE, "width and height cannot be negative.")); + return false; + } + + if (static_cast<size_t>(x + width) > source->getWidth(sourceTarget, 0) || + static_cast<size_t>(y + height) > source->getHeight(sourceTarget, 0)) + { + context->handleError( + Error(GL_INVALID_VALUE, "Source texture not large enough to copy from.")); + return false; + } + + const gl::Format &sourceFormat = source->getFormat(sourceTarget, 0); + if (!IsValidCopyTextureFormat(context, sourceFormat.format)) + { + context->handleError( + Error(GL_INVALID_OPERATION, "Source texture internal format is invalid.")); + return false; + } + + const gl::Texture *dest = context->getTexture(destId); + if (dest == nullptr) + { + context->handleError( + Error(GL_INVALID_VALUE, "Destination texture is not a valid texture object.")); + return false; + } + + if (!IsValidCopyTextureDestinationTarget(context, dest->getTarget())) + { + context->handleError(Error(GL_INVALID_VALUE, "Destination texture a valid texture type.")); + return false; + } + + GLenum destTarget = dest->getTarget(); + ASSERT(destTarget != GL_TEXTURE_CUBE_MAP); + if (dest->getWidth(sourceTarget, 0) == 0 || dest->getHeight(sourceTarget, 0) == 0) + { + context->handleError( + Error(GL_INVALID_VALUE, "Level 0 of the destination texture must be defined.")); + return false; + } + + const gl::Format &destFormat = dest->getFormat(destTarget, 0); + if (!IsValidCopyTextureDestinationFormatType(context, destFormat.format, destFormat.type)) + { + context->handleError( + Error(GL_INVALID_OPERATION, + "Destination internal format and type combination is not valid.")); + return false; + } + + if (xoffset < 0 || yoffset < 0) + { + context->handleError(Error(GL_INVALID_VALUE, "xoffset and yoffset cannot be negative.")); + return false; + } + + if (static_cast<size_t>(xoffset + width) > dest->getWidth(destTarget, 0) || + static_cast<size_t>(yoffset + height) > dest->getHeight(destTarget, 0)) + { + context->handleError( + Error(GL_INVALID_VALUE, "Destination texture not large enough to copy to.")); + return false; + } + + return true; +} + +bool ValidateCompressedCopyTextureCHROMIUM(Context *context, GLuint sourceId, GLuint destId) +{ + if (!context->getExtensions().copyCompressedTexture) + { + context->handleError(Error(GL_INVALID_OPERATION, + "GL_CHROMIUM_copy_compressed_texture extension not available.")); + return false; + } + + const gl::Texture *source = context->getTexture(sourceId); + if (source == nullptr) + { + context->handleError( + Error(GL_INVALID_VALUE, "Source texture is not a valid texture object.")); + return false; + } + + if (source->getTarget() != GL_TEXTURE_2D) + { + context->handleError( + Error(GL_INVALID_VALUE, "Source texture must be of type GL_TEXTURE_2D.")); + return false; + } + + if (source->getWidth(GL_TEXTURE_2D, 0) == 0 || source->getHeight(GL_TEXTURE_2D, 0) == 0) + { + context->handleError(Error(GL_INVALID_VALUE, "Source texture must level 0 defined.")); + return false; + } + + const gl::Format &sourceFormat = source->getFormat(GL_TEXTURE_2D, 0); + if (!sourceFormat.info->compressed) + { + context->handleError( + Error(GL_INVALID_OPERATION, "Source texture must have a compressed internal format.")); + return false; + } + + const gl::Texture *dest = context->getTexture(destId); + if (dest == nullptr) + { + context->handleError( + Error(GL_INVALID_VALUE, "Destination texture is not a valid texture object.")); + return false; + } + + if (dest->getTarget() != GL_TEXTURE_2D) + { + context->handleError( + Error(GL_INVALID_VALUE, "Destination texture must be of type GL_TEXTURE_2D.")); + return false; + } + + if (dest->getImmutableFormat()) + { + context->handleError(Error(GL_INVALID_OPERATION, "Destination cannot be immutable.")); + return false; + } + + return true; +} + +bool ValidateCreateShader(Context *context, GLenum type) +{ + switch (type) + { + case GL_VERTEX_SHADER: + case GL_FRAGMENT_SHADER: + break; + + case GL_COMPUTE_SHADER: + if (context->getClientVersion() < Version(3, 1)) + { + context->handleError( + Error(GL_INVALID_ENUM, "GL_COMPUTE_SHADER requires OpenGL ES 3.1.")); + return false; + } + break; + + default: + context->handleError(Error(GL_INVALID_ENUM, "Unknown shader type.")); + return false; + } + + return true; +} + +bool ValidateBufferData(ValidationContext *context, + GLenum target, + GLsizeiptr size, + const GLvoid *data, + GLenum usage) +{ + if (size < 0) + { + context->handleError(Error(GL_INVALID_VALUE)); + return false; + } + + switch (usage) + { + case GL_STREAM_DRAW: + case GL_STATIC_DRAW: + case GL_DYNAMIC_DRAW: + break; + + case GL_STREAM_READ: + case GL_STREAM_COPY: + case GL_STATIC_READ: + case GL_STATIC_COPY: + case GL_DYNAMIC_READ: + case GL_DYNAMIC_COPY: + if (context->getClientMajorVersion() < 3) + { + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + break; + + default: + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + + if (!ValidBufferTarget(context, target)) + { + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + + Buffer *buffer = context->getGLState().getTargetBuffer(target); + + if (!buffer) + { + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + + return true; +} + +bool ValidateBufferSubData(ValidationContext *context, + GLenum target, + GLintptr offset, + GLsizeiptr size, + const GLvoid *data) +{ + if (size < 0 || offset < 0) + { + context->handleError(Error(GL_INVALID_VALUE)); + return false; + } + + if (!ValidBufferTarget(context, target)) + { + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + + Buffer *buffer = context->getGLState().getTargetBuffer(target); + + if (!buffer) + { + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + + if (buffer->isMapped()) + { + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + + // Check for possible overflow of size + offset + angle::CheckedNumeric<size_t> checkedSize(size); + checkedSize += offset; + if (!checkedSize.IsValid()) + { + context->handleError(Error(GL_OUT_OF_MEMORY)); + return false; + } + + if (size + offset > buffer->getSize()) + { + context->handleError(Error(GL_INVALID_VALUE)); + return false; + } + + return true; +} + +bool ValidateEnableExtensionANGLE(ValidationContext *context, const GLchar *name) +{ + if (!context->getExtensions().webglCompatibility) + { + context->handleError( + Error(GL_INVALID_OPERATION, "GL_ANGLE_webgl_compatibility is not available.")); + return false; + } + + const ExtensionInfoMap &extensionInfos = GetExtensionInfoMap(); + auto extension = extensionInfos.find(name); + if (extension == extensionInfos.end() || !extension->second.Enableable) + { + context->handleError(Error(GL_INVALID_OPERATION, "Extension %s is not enableable.", name)); + return false; + } + + return true; +} + +bool ValidateActiveTexture(ValidationContext *context, GLenum texture) +{ + if (texture < GL_TEXTURE0 || + texture > GL_TEXTURE0 + context->getCaps().maxCombinedTextureImageUnits - 1) + { + context->handleError(Error(GL_INVALID_ENUM)); + return false; + } + + return true; +} + +bool ValidateAttachShader(ValidationContext *context, GLuint program, GLuint shader) +{ + Program *programObject = GetValidProgram(context, program); + if (!programObject) + { + return false; + } + + Shader *shaderObject = GetValidShader(context, shader); + if (!shaderObject) + { + return false; + } + + switch (shaderObject->getType()) + { + case GL_VERTEX_SHADER: + { + if (programObject->getAttachedVertexShader()) + { + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + break; + } + case GL_FRAGMENT_SHADER: + { + if (programObject->getAttachedFragmentShader()) + { + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + break; + } + case GL_COMPUTE_SHADER: + { + if (programObject->getAttachedComputeShader()) + { + context->handleError(Error(GL_INVALID_OPERATION)); + return false; + } + break; + } + default: + UNREACHABLE(); + break; + } + + return true; +} + +bool ValidateBindAttribLocation(ValidationContext *context, + GLuint program, + GLuint index, + const GLchar *name) +{ + if (index >= MAX_VERTEX_ATTRIBS) + { + context->handleError(Error(GL_INVALID_VALUE, "Index exceeds MAX_VERTEX_ATTRIBS")); + return false; + } + + if (strncmp(name, "gl_", 3) == 0) + { + context->handleError(Error(GL_INVALID_OPERATION, "Cannot Bind built-in attributes")); + return false; + } + + return GetValidProgram(context, program) != nullptr; +} + +bool ValidateBindBuffer(ValidationContext *context, GLenum target, GLuint buffer) +{ + if (!ValidBufferTarget(context, target)) + { + context->handleError(Error(GL_INVALID_ENUM, "Invalid Buffer target")); + return false; + } + + if (!context->getGLState().isBindGeneratesResourceEnabled() && + !context->isBufferGenerated(buffer)) + { + context->handleError(Error(GL_INVALID_OPERATION, "Buffer was not generated")); + return false; + } + + return true; +} + +bool ValidateBindFramebuffer(ValidationContext *context, GLenum target, GLuint framebuffer) +{ + if (!ValidFramebufferTarget(target)) + { + context->handleError(Error(GL_INVALID_ENUM, "Invalid Framebuffer target")); + return false; + } + + if (!context->getGLState().isBindGeneratesResourceEnabled() && + !context->isFramebufferGenerated(framebuffer)) + { + context->handleError(Error(GL_INVALID_OPERATION, "Framebuffer was not generated")); + return false; + } + + return true; +} + +bool ValidateBindRenderbuffer(ValidationContext *context, GLenum target, GLuint renderbuffer) +{ + if (target != GL_RENDERBUFFER) + { + context->handleError(Error(GL_INVALID_ENUM, "Invalid Renderbuffer target")); + return false; + } + + if (!context->getGLState().isBindGeneratesResourceEnabled() && + !context->isRenderbufferGenerated(renderbuffer)) + { + context->handleError(Error(GL_INVALID_OPERATION, "Renderbuffer was not generated")); + return false; + } + + return true; +} + +static bool ValidBlendEquationMode(GLenum mode) +{ + switch (mode) + { + case GL_FUNC_ADD: + case GL_FUNC_SUBTRACT: + case GL_FUNC_REVERSE_SUBTRACT: + case GL_MIN: + case GL_MAX: + return true; + + default: + return false; + } +} + +bool ValidateBlendEquation(ValidationContext *context, GLenum mode) +{ + if (!ValidBlendEquationMode(mode)) + { + context->handleError(Error(GL_INVALID_ENUM, "Invalid blend equation")); + return false; + } + + return true; +} + +bool ValidateBlendEquationSeparate(ValidationContext *context, GLenum modeRGB, GLenum modeAlpha) +{ + if (!ValidBlendEquationMode(modeRGB)) + { + context->handleError(Error(GL_INVALID_ENUM, "Invalid RGB blend equation")); + return false; + } + + if (!ValidBlendEquationMode(modeAlpha)) + { + context->handleError(Error(GL_INVALID_ENUM, "Invalid alpha blend equation")); + return false; + } + + return true; +} + +bool ValidateBlendFunc(ValidationContext *context, GLenum sfactor, GLenum dfactor) +{ + return ValidateBlendFuncSeparate(context, sfactor, dfactor, sfactor, dfactor); +} + +static bool ValidSrcBlendFunc(GLenum srcBlend) +{ + switch (srcBlend) + { + case GL_ZERO: + case GL_ONE: + case GL_SRC_COLOR: + case GL_ONE_MINUS_SRC_COLOR: + case GL_DST_COLOR: + case GL_ONE_MINUS_DST_COLOR: + case GL_SRC_ALPHA: + case GL_ONE_MINUS_SRC_ALPHA: + case GL_DST_ALPHA: + case GL_ONE_MINUS_DST_ALPHA: + case GL_CONSTANT_COLOR: + case GL_ONE_MINUS_CONSTANT_COLOR: + case GL_CONSTANT_ALPHA: + case GL_ONE_MINUS_CONSTANT_ALPHA: + case GL_SRC_ALPHA_SATURATE: + return true; + + default: + return false; + } +} + +static bool ValidDstBlendFunc(GLenum dstBlend, GLint contextMajorVersion) +{ + switch (dstBlend) + { + case GL_ZERO: + case GL_ONE: + case GL_SRC_COLOR: + case GL_ONE_MINUS_SRC_COLOR: + case GL_DST_COLOR: + case GL_ONE_MINUS_DST_COLOR: + case GL_SRC_ALPHA: + case GL_ONE_MINUS_SRC_ALPHA: + case GL_DST_ALPHA: + case GL_ONE_MINUS_DST_ALPHA: + case GL_CONSTANT_COLOR: + case GL_ONE_MINUS_CONSTANT_COLOR: + case GL_CONSTANT_ALPHA: + case GL_ONE_MINUS_CONSTANT_ALPHA: + return true; + + case GL_SRC_ALPHA_SATURATE: + return (contextMajorVersion >= 3); + + default: + return false; + } +} + +bool ValidateBlendFuncSeparate(ValidationContext *context, + GLenum srcRGB, + GLenum dstRGB, + GLenum srcAlpha, + GLenum dstAlpha) +{ + if (!ValidSrcBlendFunc(srcRGB)) + { + context->handleError(Error(GL_INVALID_ENUM, "Invalid blend function")); + return false; + } + + if (!ValidDstBlendFunc(dstRGB, context->getClientMajorVersion())) + { + context->handleError(Error(GL_INVALID_ENUM, "Invalid blend function")); + return false; + } + + if (!ValidSrcBlendFunc(srcAlpha)) + { + context->handleError(Error(GL_INVALID_ENUM, "Invalid blend function")); + return false; + } + + if (!ValidDstBlendFunc(dstAlpha, context->getClientMajorVersion())) + { + context->handleError(Error(GL_INVALID_ENUM, "Invalid blend function")); + return false; + } + + if (context->getLimitations().noSimultaneousConstantColorAndAlphaBlendFunc) + { + bool constantColorUsed = + (srcRGB == GL_CONSTANT_COLOR || srcRGB == GL_ONE_MINUS_CONSTANT_COLOR || + dstRGB == GL_CONSTANT_COLOR || dstRGB == GL_ONE_MINUS_CONSTANT_COLOR); + + bool constantAlphaUsed = + (srcRGB == GL_CONSTANT_ALPHA || srcRGB == GL_ONE_MINUS_CONSTANT_ALPHA || + dstRGB == GL_CONSTANT_ALPHA || dstRGB == GL_ONE_MINUS_CONSTANT_ALPHA); + + if (constantColorUsed && constantAlphaUsed) + { + ERR("Simultaneous use of GL_CONSTANT_ALPHA/GL_ONE_MINUS_CONSTANT_ALPHA and " + "GL_CONSTANT_COLOR/GL_ONE_MINUS_CONSTANT_COLOR not supported by this " + "implementation."); + context->handleError(Error(GL_INVALID_OPERATION, + "Simultaneous use of " + "GL_CONSTANT_ALPHA/GL_ONE_MINUS_CONSTANT_ALPHA and " + "GL_CONSTANT_COLOR/GL_ONE_MINUS_CONSTANT_COLOR not " + "supported by this implementation.")); + return false; + } + } + + return true; +} + +} // namespace gl |