Function GetExpandedShaderCode

Shadows/SampleFramework11/ShaderCompilation.cpp:28–73

{

static string GetExpandedShaderCode(const wchar* path, vector<wstring>& filePaths)
{
    for(uint64 i = 0; i < filePaths.size(); ++i)
        if(filePaths[i] == path)
            throw Exception(L"File \"" + wstring(path) + L" is recursively included");

    filePaths.push_back(path);

    string fileContents = ReadFileAsString(path);
    wstring fileDirectory = GetDirectoryFromFilePath(path);

    // Look for includes
    size_t lineStart = 0;
    size_t lineEnd = std::string::npos;
    while(true)
    {
        size_t lineEnd = fileContents.find('\n', lineStart);
        size_t lineLength = 0;
        if(lineEnd == string::npos)
            lineLength = string::npos;
        else
            lineLength = lineEnd - lineStart;

        string line = fileContents.substr(lineStart, lineLength);
        if(line.find("#include") == 0)
        {
            size_t startQuote = line.find('\"');
            size_t endQuote = line.find('\"', startQuote + 1);
            string includePath = line.substr(startQuote + 1, endQuote - startQuote - 1);
            wstring fullIncludePath = fileDirectory + AnsiToWString(includePath.c_str());
            if(FileExists(fullIncludePath.c_str()) == false)
                throw Exception(L"Couldn't find #included file \"" + fullIncludePath + L"\"");

            string includeCode = GetExpandedShaderCode(fullIncludePath.c_str(), filePaths);
            fileContents.insert(lineEnd + 1, includeCode);
            lineEnd += includeCode.length();
        }

        if(lineEnd == string::npos)
            break;

        lineStart = lineEnd + 1;
    }

    return fileContents;
}

static const wstring baseCacheDir = L"ShaderCache\\";