C++ TCompiler::getInfoSink方法代码示例

void ShGetInfo(const ShHandle handle, ShShaderInfo pname, size_t* params)
{
    if (!handle || !params)
        return;

    TShHandleBase* base = static_cast<TShHandleBase*>(handle);
    TCompiler* compiler = base->getAsCompiler();
    if (!compiler) return;

    switch(pname)
    {
    case SH_INFO_LOG_LENGTH:
        *params = compiler->getInfoSink().info.size() + 1;
        break;
    case SH_OBJECT_CODE_LENGTH:
        *params = compiler->getInfoSink().obj.size() + 1;
        break;
    case SH_ACTIVE_UNIFORMS:
        *params = compiler->getUniforms().size();
        break;
    case SH_ACTIVE_UNIFORM_MAX_LENGTH:
        *params = 1 +  MAX_SYMBOL_NAME_LEN;
        break;
    case SH_ACTIVE_ATTRIBUTES:
        *params = compiler->getAttribs().size();
        break;
    case SH_ACTIVE_ATTRIBUTE_MAX_LENGTH:
        *params = 1 + MAX_SYMBOL_NAME_LEN;
        break;
    case SH_VARYINGS:
        *params = compiler->getVaryings().size();
        break;
    case SH_VARYING_MAX_LENGTH:
        *params = 1 + MAX_SYMBOL_NAME_LEN;
        break;
    case SH_MAPPED_NAME_MAX_LENGTH:
        // Use longer length than MAX_SHORTENED_IDENTIFIER_SIZE to
        // handle array and struct dereferences.
        *params = 1 + MAX_SYMBOL_NAME_LEN;
        break;
    case SH_NAME_MAX_LENGTH:
        *params = 1 + MAX_SYMBOL_NAME_LEN;
        break;
    case SH_HASHED_NAME_MAX_LENGTH:
        if (compiler->getHashFunction() == NULL) {
            *params = 0;
        } else {
            // 64 bits hashing output requires 16 bytes for hex
            // representation.
            const char HashedNamePrefix[] = HASHED_NAME_PREFIX;
            *params = 16 + sizeof(HashedNamePrefix);
        }
        break;
    case SH_HASHED_NAMES_COUNT:
        *params = compiler->getNameMap().size();
        break;
    default:
        UNREACHABLE();
    }
}

//
// Return any object code.
//
const std::string &ShGetObjectCode(const ShHandle handle)
{
    TCompiler *compiler = GetCompilerFromHandle(handle);
    ASSERT(compiler);

    TInfoSink &infoSink = compiler->getInfoSink();
    return infoSink.obj.str();
}

//
// Return any compiler log of messages for the application.
//
const std::string &GetInfoLog(const ShHandle handle)
{
    TCompiler *compiler = GetCompilerFromHandle(handle);
    ASSERT(compiler);

    TInfoSink &infoSink = compiler->getInfoSink();
    return infoSink.info.str();
}

//
// Return any object code.
//
void ShGetObjectCode(const ShHandle handle, char* objCode)
{
    if (!handle || !objCode)
        return;

    TShHandleBase* base = static_cast<TShHandleBase*>(handle);
    TCompiler* compiler = base->getAsCompiler();
    if (!compiler) return;

    TInfoSink& infoSink = compiler->getInfoSink();
    strcpy(objCode, infoSink.obj.c_str());
}

//
// Return any compiler log of messages for the application.
//
void ShGetInfoLog(const ShHandle handle, char* infoLog)
{
    if (!handle || !infoLog)
        return;

    TShHandleBase* base = static_cast<TShHandleBase*>(handle);
    TCompiler* compiler = base->getAsCompiler();
    if (!compiler) return;

    TInfoSink& infoSink = compiler->getInfoSink();
    strcpy(infoLog, infoSink.info.c_str());
}

//
// Driver calls these to create and destroy compiler objects.
//
ShHandle ShConstructCompiler(EShLanguage language, EShSpec spec, const TBuiltInResource* resources)
{
    if (!InitThread())
        return 0;

    TShHandleBase* base = static_cast<TShHandleBase*>(ConstructCompiler(language, spec));
    TCompiler* compiler = base->getAsCompiler();
    if (compiler == 0)
        return 0;

    // Generate built-in symbol table.
    if (!GenerateBuiltInSymbolTable(language, spec, *resources, compiler->getInfoSink(), compiler->getSymbolTable())) {
        ShDestruct(base);
        return 0;
    }

    return reinterpret_cast<void*>(base);
}

//
// Do an actual compile on the given strings.  The result is left 
// in the given compile object.
//
// Return:  The return value of ShCompile is really boolean, indicating
// success or failure.
//
int ShCompile(
    const ShHandle handle,
    const char* const shaderStrings[],
    const int numStrings,
    const EShOptimizationLevel optLevel,
    int debugOptions
    )
{
    if (!InitThread())
        return 0;

    if (handle == 0)
        return 0;

    TShHandleBase* base = reinterpret_cast<TShHandleBase*>(handle);
    TCompiler* compiler = base->getAsCompiler();
    if (compiler == 0)
        return 0;
    
    GlobalPoolAllocator.push();
    TInfoSink& infoSink = compiler->getInfoSink();
    infoSink.info.erase();
    infoSink.debug.erase();
    infoSink.obj.erase();

    if (numStrings == 0)
        return 1;

    TIntermediate intermediate(infoSink);
    TSymbolTable& symbolTable = compiler->getSymbolTable();

    TParseContext parseContext(symbolTable, intermediate, compiler->getLanguage(), compiler->getSpec(), infoSink);
    parseContext.initializeExtensionBehavior();
    GlobalParseContext = &parseContext;
 
    setInitialState();

    InitPreprocessor();
    //
    // Parse the application's shaders.  All the following symbol table
    // work will be throw-away, so push a new allocation scope that can
    // be thrown away, then push a scope for the current shader's globals.
    //
    bool success = true;

    symbolTable.push();
    if (!symbolTable.atGlobalLevel())
        parseContext.infoSink.info.message(EPrefixInternalError, "Wrong symbol table level");

    int ret = PaParseStrings(const_cast<char**>(shaderStrings), 0, numStrings, parseContext);
    if (ret)
        success = false;

    if (success && parseContext.treeRoot) {
        if (optLevel == EShOptNoGeneration)
            parseContext.infoSink.info.message(EPrefixNone, "No errors.  No code generation was requested.");
        else {
            success = intermediate.postProcess(parseContext.treeRoot, parseContext.language);

            if (success) {

                if (debugOptions & EDebugOpIntermediate)
                    intermediate.outputTree(parseContext.treeRoot);

                //
                // Call the machine dependent compiler
                //
                if (!compiler->compile(parseContext.treeRoot))
                    success = false;
            }
        }
    } else if (!success) {
        parseContext.infoSink.info.prefix(EPrefixError);
        parseContext.infoSink.info << parseContext.numErrors << " compilation errors.  No code generated.\n\n";
        success = false;
        if (debugOptions & EDebugOpIntermediate)
            intermediate.outputTree(parseContext.treeRoot);
    } else if (!parseContext.treeRoot) {
        parseContext.error(1, "Unexpected end of file.", "", "");
        parseContext.infoSink.info << parseContext.numErrors << " compilation errors.  No code generated.\n\n";
        success = false;
        if (debugOptions & EDebugOpIntermediate)
            intermediate.outputTree(parseContext.treeRoot);
    }

    intermediate.remove(parseContext.treeRoot);

    //
    // Ensure symbol table is returned to the built-in level,
    // throwing away all but the built-ins.
    //
    while (!symbolTable.atBuiltInLevel())
        symbolTable.pop();
//.........这里部分代码省略.........