// Compiles a GL shader and attaches it to a program. Returns the shader ID if // successful, or 0 if not. static GrGLuint attach_shader(const GrGLContext& glCtx, GrGLuint programId, GrGLenum type, const SkString& shaderSrc) { const GrGLInterface* gli = glCtx.interface(); GrGLuint shaderId; GR_GL_CALL_RET(gli, shaderId, CreateShader(type)); if (0 == shaderId) { return 0; } const GrGLchar* sourceStr = shaderSrc.c_str(); GrGLint sourceLength = static_cast<GrGLint>(shaderSrc.size()); GR_GL_CALL(gli, ShaderSource(shaderId, 1, &sourceStr, &sourceLength)); GR_GL_CALL(gli, CompileShader(shaderId)); // Calling GetShaderiv in Chromium is quite expensive. Assume success in release builds. bool checkCompiled = !glCtx.isChromium(); #ifdef SK_DEBUG checkCompiled = true; #endif if (checkCompiled) { GrGLint compiled = GR_GL_INIT_ZERO; GR_GL_CALL(gli, GetShaderiv(shaderId, GR_GL_COMPILE_STATUS, &compiled)); if (!compiled) { GrGLint infoLen = GR_GL_INIT_ZERO; GR_GL_CALL(gli, GetShaderiv(shaderId, GR_GL_INFO_LOG_LENGTH, &infoLen)); SkAutoMalloc log(sizeof(char)*(infoLen+1)); // outside if for debugger if (infoLen > 0) { // retrieve length even though we don't need it to workaround bug in Chromium cmd // buffer param validation. GrGLsizei length = GR_GL_INIT_ZERO; GR_GL_CALL(gli, GetShaderInfoLog(shaderId, infoLen+1, &length, (char*)log.get())); GrPrintf(shaderSrc.c_str()); GrPrintf("\n%s", log.get()); } SkDEBUGFAIL("Shader compilation failed!"); GR_GL_CALL(gli, DeleteShader(shaderId)); return 0; } } TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("skia.gpu"), "skia_gpu::GLShader", TRACE_EVENT_SCOPE_THREAD, "shader", TRACE_STR_COPY(shaderSrc.c_str())); if (c_PrintShaders) { GrPrintf(shaderSrc.c_str()); GrPrintf("\n"); } // Attach the shader, but defer deletion until after we have linked the program. // This works around a bug in the Android emulator's GLES2 wrapper which // will immediately delete the shader object and free its memory even though it's // attached to a program, which then causes glLinkProgram to fail. GR_GL_CALL(gli, AttachShader(programId, shaderId)); return shaderId; }
// Compiles a GL shader, attaches it to a program, and releases the shader's reference. // (That way there's no need to hang on to the GL shader id and delete it later.) static bool attach_shader(const GrGLContext& glCtx, GrGLuint programId, GrGLenum type, const SkString& shaderSrc) { const GrGLInterface* gli = glCtx.interface(); GrGLuint shaderId; GR_GL_CALL_RET(gli, shaderId, CreateShader(type)); if (0 == shaderId) { return false; } const GrGLchar* sourceStr = shaderSrc.c_str(); GrGLint sourceLength = static_cast<GrGLint>(shaderSrc.size()); GR_GL_CALL(gli, ShaderSource(shaderId, 1, &sourceStr, &sourceLength)); GR_GL_CALL(gli, CompileShader(shaderId)); // Calling GetShaderiv in Chromium is quite expensive. Assume success in release builds. bool checkCompiled = !glCtx.info().isChromium(); #ifdef SK_DEBUG checkCompiled = true; #endif if (checkCompiled) { GrGLint compiled = GR_GL_INIT_ZERO; GR_GL_CALL(gli, GetShaderiv(shaderId, GR_GL_COMPILE_STATUS, &compiled)); if (!compiled) { GrGLint infoLen = GR_GL_INIT_ZERO; GR_GL_CALL(gli, GetShaderiv(shaderId, GR_GL_INFO_LOG_LENGTH, &infoLen)); SkAutoMalloc log(sizeof(char)*(infoLen+1)); // outside if for debugger if (infoLen > 0) { // retrieve length even though we don't need it to workaround bug in Chromium cmd // buffer param validation. GrGLsizei length = GR_GL_INIT_ZERO; GR_GL_CALL(gli, GetShaderInfoLog(shaderId, infoLen+1, &length, (char*)log.get())); GrPrintf(shaderSrc.c_str()); GrPrintf("\n%s", log.get()); } SkDEBUGFAIL("Shader compilation failed!"); GR_GL_CALL(gli, DeleteShader(shaderId)); return false; } } if (c_PrintShaders) { GrPrintf(shaderSrc.c_str()); GrPrintf("\n"); } GR_GL_CALL(gli, AttachShader(programId, shaderId)); GR_GL_CALL(gli, DeleteShader(shaderId)); return true; }