GLenum WebGLContext::CheckedBufferData(GLenum target, GLsizeiptr size, const GLvoid* data, GLenum usage) { #ifdef XP_MACOSX // bug 790879 if (gl->WorkAroundDriverBugs() && int64_t(size) > INT32_MAX) // cast avoids a potential always-true warning on 32bit { GenerateWarning("Rejecting valid bufferData call with size %lu to avoid" " a Mac bug", size); return LOCAL_GL_INVALID_VALUE; } #endif WebGLRefPtr<WebGLBuffer>& bufferSlot = GetBufferSlotByTarget(target); WebGLBuffer* boundBuffer = bufferSlot.get(); MOZ_ASSERT(boundBuffer, "No buffer bound for this target."); bool sizeChanges = uint32_t(size) != boundBuffer->ByteLength(); if (sizeChanges) { GetAndFlushUnderlyingGLErrors(); gl->fBufferData(target, size, data, usage); GLenum error = GetAndFlushUnderlyingGLErrors(); return error; } else { gl->fBufferData(target, size, data, usage); return LOCAL_GL_NO_ERROR; } }
void WebGLContext::AssertCachedBindings() { #ifdef DEBUG MakeContextCurrent(); GetAndFlushUnderlyingGLErrors(); if (IsWebGL2() || IsExtensionEnabled(WebGLExtensionID::OES_vertex_array_object)) { GLuint bound = mBoundVertexArray ? mBoundVertexArray->GLName() : 0; AssertUintParamCorrect(gl, LOCAL_GL_VERTEX_ARRAY_BINDING, bound); } // Framebuffers if (IsWebGL2()) { GLuint bound = mBoundDrawFramebuffer ? mBoundDrawFramebuffer->mGLName : 0; AssertUintParamCorrect(gl, LOCAL_GL_DRAW_FRAMEBUFFER_BINDING, bound); bound = mBoundReadFramebuffer ? mBoundReadFramebuffer->mGLName : 0; AssertUintParamCorrect(gl, LOCAL_GL_READ_FRAMEBUFFER_BINDING, bound); } else { MOZ_ASSERT(mBoundDrawFramebuffer == mBoundReadFramebuffer); GLuint bound = mBoundDrawFramebuffer ? mBoundDrawFramebuffer->mGLName : 0; AssertUintParamCorrect(gl, LOCAL_GL_FRAMEBUFFER_BINDING, bound); } GLint stencilBits = 0; if (GetStencilBits(&stencilBits)) { // Depends on current draw framebuffer. const GLuint stencilRefMask = (1 << stencilBits) - 1; AssertMaskedUintParamCorrect(gl, LOCAL_GL_STENCIL_REF, stencilRefMask, mStencilRefFront); AssertMaskedUintParamCorrect(gl, LOCAL_GL_STENCIL_BACK_REF, stencilRefMask, mStencilRefBack); } // Program GLuint bound = mCurrentProgram ? mCurrentProgram->mGLName : 0; AssertUintParamCorrect(gl, LOCAL_GL_CURRENT_PROGRAM, bound); // Textures GLenum activeTexture = mActiveTexture + LOCAL_GL_TEXTURE0; AssertUintParamCorrect(gl, LOCAL_GL_ACTIVE_TEXTURE, activeTexture); WebGLTexture* curTex = ActiveBoundTextureForTarget(LOCAL_GL_TEXTURE_2D); bound = curTex ? curTex->mGLName : 0; AssertUintParamCorrect(gl, LOCAL_GL_TEXTURE_BINDING_2D, bound); curTex = ActiveBoundTextureForTarget(LOCAL_GL_TEXTURE_CUBE_MAP); bound = curTex ? curTex->mGLName : 0; AssertUintParamCorrect(gl, LOCAL_GL_TEXTURE_BINDING_CUBE_MAP, bound); // Buffers bound = mBoundArrayBuffer ? mBoundArrayBuffer->mGLName : 0; AssertUintParamCorrect(gl, LOCAL_GL_ARRAY_BUFFER_BINDING, bound); MOZ_ASSERT(mBoundVertexArray); WebGLBuffer* curBuff = mBoundVertexArray->mElementArrayBuffer; bound = curBuff ? curBuff->mGLName : 0; AssertUintParamCorrect(gl, LOCAL_GL_ELEMENT_ARRAY_BUFFER_BINDING, bound); MOZ_ASSERT(!GetAndFlushUnderlyingGLErrors()); #endif // We do not check the renderbuffer binding, because we never rely on it matching. }
void WebGLContext::AssertCachedGlobalState() { #ifdef DEBUG MakeContextCurrent(); GetAndFlushUnderlyingGLErrors(); //////////////// // Draw state MOZ_ASSERT(gl->fIsEnabled(LOCAL_GL_DEPTH_TEST) == mDepthTestEnabled); MOZ_ASSERT(gl->fIsEnabled(LOCAL_GL_DITHER) == mDitherEnabled); MOZ_ASSERT_IF(IsWebGL2(), gl->fIsEnabled(LOCAL_GL_RASTERIZER_DISCARD) == mRasterizerDiscardEnabled); MOZ_ASSERT(gl->fIsEnabled(LOCAL_GL_SCISSOR_TEST) == mScissorTestEnabled); MOZ_ASSERT(gl->fIsEnabled(LOCAL_GL_STENCIL_TEST) == mStencilTestEnabled); realGLboolean colorWriteMask[4] = {0, 0, 0, 0}; gl->fGetBooleanv(LOCAL_GL_COLOR_WRITEMASK, colorWriteMask); MOZ_ASSERT(colorWriteMask[0] == mColorWriteMask[0] && colorWriteMask[1] == mColorWriteMask[1] && colorWriteMask[2] == mColorWriteMask[2] && colorWriteMask[3] == mColorWriteMask[3]); GLfloat colorClearValue[4] = {0.0f, 0.0f, 0.0f, 0.0f}; gl->fGetFloatv(LOCAL_GL_COLOR_CLEAR_VALUE, colorClearValue); MOZ_ASSERT(IsCacheCorrect(mColorClearValue[0], colorClearValue[0]) && IsCacheCorrect(mColorClearValue[1], colorClearValue[1]) && IsCacheCorrect(mColorClearValue[2], colorClearValue[2]) && IsCacheCorrect(mColorClearValue[3], colorClearValue[3])); realGLboolean depthWriteMask = 0; gl->fGetBooleanv(LOCAL_GL_DEPTH_WRITEMASK, &depthWriteMask); MOZ_ASSERT(depthWriteMask == mDepthWriteMask); GLfloat depthClearValue = 0.0f; gl->fGetFloatv(LOCAL_GL_DEPTH_CLEAR_VALUE, &depthClearValue); MOZ_ASSERT(IsCacheCorrect(mDepthClearValue, depthClearValue)); AssertUintParamCorrect(gl, LOCAL_GL_STENCIL_CLEAR_VALUE, mStencilClearValue); // GLES 3.0.4, $4.1.4, p177: // [...] the front and back stencil mask are both set to the value `2^s - 1`, where // `s` is greater than or equal to the number of bits in the deepest stencil buffer // supported by the GL implementation. const int maxStencilBits = 8; const GLuint maxStencilBitsMask = (1 << maxStencilBits) - 1; AssertMaskedUintParamCorrect(gl, LOCAL_GL_STENCIL_VALUE_MASK, maxStencilBitsMask, mStencilValueMaskFront); AssertMaskedUintParamCorrect(gl, LOCAL_GL_STENCIL_BACK_VALUE_MASK, maxStencilBitsMask, mStencilValueMaskBack); AssertMaskedUintParamCorrect(gl, LOCAL_GL_STENCIL_WRITEMASK, maxStencilBitsMask, mStencilWriteMaskFront); AssertMaskedUintParamCorrect(gl, LOCAL_GL_STENCIL_BACK_WRITEMASK, maxStencilBitsMask, mStencilWriteMaskBack); // Viewport GLint int4[4] = {0, 0, 0, 0}; gl->fGetIntegerv(LOCAL_GL_VIEWPORT, int4); MOZ_ASSERT(int4[0] == mViewportX && int4[1] == mViewportY && int4[2] == mViewportWidth && int4[3] == mViewportHeight); AssertUintParamCorrect(gl, LOCAL_GL_PACK_ALIGNMENT, mPixelStore_PackAlignment); AssertUintParamCorrect(gl, LOCAL_GL_UNPACK_ALIGNMENT, mPixelStore_UnpackAlignment); if (IsWebGL2()) { AssertUintParamCorrect(gl, LOCAL_GL_UNPACK_IMAGE_HEIGHT, mPixelStore_UnpackImageHeight); AssertUintParamCorrect(gl, LOCAL_GL_UNPACK_SKIP_IMAGES , mPixelStore_UnpackSkipImages); AssertUintParamCorrect(gl, LOCAL_GL_UNPACK_ROW_LENGTH , mPixelStore_UnpackRowLength); AssertUintParamCorrect(gl, LOCAL_GL_UNPACK_SKIP_ROWS , mPixelStore_UnpackSkipRows); AssertUintParamCorrect(gl, LOCAL_GL_UNPACK_SKIP_PIXELS , mPixelStore_UnpackSkipPixels); AssertUintParamCorrect(gl, LOCAL_GL_PACK_ROW_LENGTH , mPixelStore_PackRowLength); AssertUintParamCorrect(gl, LOCAL_GL_PACK_SKIP_ROWS , mPixelStore_PackSkipRows); AssertUintParamCorrect(gl, LOCAL_GL_PACK_SKIP_PIXELS , mPixelStore_PackSkipPixels); } MOZ_ASSERT(!GetAndFlushUnderlyingGLErrors()); #endif }
bool WebGLContext::DoFakeVertexAttrib0(GLuint vertexCount) { WebGLVertexAttrib0Status whatDoesAttrib0Need = WhatDoesVertexAttrib0Need(); if (MOZ_LIKELY(whatDoesAttrib0Need == WebGLVertexAttrib0Status::Default)) return true; if (!mAlreadyWarnedAboutFakeVertexAttrib0) { GenerateWarning("Drawing without vertex attrib 0 array enabled forces the browser " "to do expensive emulation work when running on desktop OpenGL " "platforms, for example on Mac. It is preferable to always draw " "with vertex attrib 0 array enabled, by using bindAttribLocation " "to bind some always-used attribute to location 0."); mAlreadyWarnedAboutFakeVertexAttrib0 = true; } CheckedUint32 checked_dataSize = CheckedUint32(vertexCount) * 4 * sizeof(GLfloat); if (!checked_dataSize.isValid()) { ErrorOutOfMemory("Integer overflow trying to construct a fake vertex attrib 0 array for a draw-operation " "with %d vertices. Try reducing the number of vertices.", vertexCount); return false; } GLuint dataSize = checked_dataSize.value(); if (!mFakeVertexAttrib0BufferObject) { gl->fGenBuffers(1, &mFakeVertexAttrib0BufferObject); } // if the VBO status is already exactly what we need, or if the only difference is that it's initialized and // we don't need it to be, then consider it OK bool vertexAttrib0BufferStatusOK = mFakeVertexAttrib0BufferStatus == whatDoesAttrib0Need || (mFakeVertexAttrib0BufferStatus == WebGLVertexAttrib0Status::EmulatedInitializedArray && whatDoesAttrib0Need == WebGLVertexAttrib0Status::EmulatedUninitializedArray); if (!vertexAttrib0BufferStatusOK || mFakeVertexAttrib0BufferObjectSize < dataSize || mFakeVertexAttrib0BufferObjectVector[0] != mVertexAttrib0Vector[0] || mFakeVertexAttrib0BufferObjectVector[1] != mVertexAttrib0Vector[1] || mFakeVertexAttrib0BufferObjectVector[2] != mVertexAttrib0Vector[2] || mFakeVertexAttrib0BufferObjectVector[3] != mVertexAttrib0Vector[3]) { mFakeVertexAttrib0BufferStatus = whatDoesAttrib0Need; mFakeVertexAttrib0BufferObjectSize = dataSize; mFakeVertexAttrib0BufferObjectVector[0] = mVertexAttrib0Vector[0]; mFakeVertexAttrib0BufferObjectVector[1] = mVertexAttrib0Vector[1]; mFakeVertexAttrib0BufferObjectVector[2] = mVertexAttrib0Vector[2]; mFakeVertexAttrib0BufferObjectVector[3] = mVertexAttrib0Vector[3]; gl->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, mFakeVertexAttrib0BufferObject); GetAndFlushUnderlyingGLErrors(); if (mFakeVertexAttrib0BufferStatus == WebGLVertexAttrib0Status::EmulatedInitializedArray) { auto array = MakeUniqueFallible<GLfloat[]>(4 * vertexCount); if (!array) { ErrorOutOfMemory("Fake attrib0 array."); return false; } for(size_t i = 0; i < vertexCount; ++i) { array[4 * i + 0] = mVertexAttrib0Vector[0]; array[4 * i + 1] = mVertexAttrib0Vector[1]; array[4 * i + 2] = mVertexAttrib0Vector[2]; array[4 * i + 3] = mVertexAttrib0Vector[3]; } gl->fBufferData(LOCAL_GL_ARRAY_BUFFER, dataSize, array.get(), LOCAL_GL_DYNAMIC_DRAW); } else { gl->fBufferData(LOCAL_GL_ARRAY_BUFFER, dataSize, nullptr, LOCAL_GL_DYNAMIC_DRAW); } GLenum error = GetAndFlushUnderlyingGLErrors(); gl->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, mBoundArrayBuffer ? mBoundArrayBuffer->mGLName : 0); // note that we do this error checking and early return AFTER having restored the buffer binding above if (error) { ErrorOutOfMemory("Ran out of memory trying to construct a fake vertex attrib 0 array for a draw-operation " "with %d vertices. Try reducing the number of vertices.", vertexCount); return false; } } gl->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, mFakeVertexAttrib0BufferObject); gl->fVertexAttribPointer(0, 4, LOCAL_GL_FLOAT, LOCAL_GL_FALSE, 0, 0); return true; }