Method LoadShader

code/AssetLib/MD3/MD3Loader.cpp:108–218

------------------------------------------------------------------------------------------------ Load a Quake 3 shader

// ------------------------------------------------------------------------------------------------
// Load a Quake 3 shader
bool Q3Shader::LoadShader(ShaderData &fill, const std::string &pFile, IOSystem *io) {
    std::unique_ptr<IOStream> file(io->Open(pFile, "rt"));
    if (!file)
        return false; // if we can't access the file, don't worry and return

    ASSIMP_LOG_INFO("Loading Quake3 shader file ", pFile);

    // read file in memory
    const size_t s = file->FileSize();
    std::vector<char> _buff(s + 1);
    file->Read(&_buff[0], s, 1);
    _buff[s] = 0;

    // remove comments from it (C++ style)
    CommentRemover::RemoveLineComments("//", &_buff[0]);
    const char *buff = &_buff[0];
    const char *end = buff + _buff.size();
    Q3Shader::ShaderDataBlock *curData = nullptr;
    Q3Shader::ShaderMapBlock *curMap = nullptr;

    // read line per line
    for (; SkipSpacesAndLineEnd(&buff, end); SkipLine(&buff, end)) {

        if (*buff == '{') {
            ++buff;

            // append to last section, if any
            if (!curData) {
                ASSIMP_LOG_ERROR("Q3Shader: Unexpected shader section token \'{\'");
                return true; // still no failure, the file is there
            }

            // read this data section
            for (; SkipSpacesAndLineEnd(&buff, end); SkipLine(&buff, end)) {
                if (*buff == '{') {
                    ++buff;
                    // add new map section
                    curData->maps.emplace_back();
                    curMap = &curData->maps.back();

                    for (; SkipSpacesAndLineEnd(&buff, end); SkipLine(&buff, end)) {
                        // 'map' - Specifies texture file name
                        if (TokenMatchI(buff, "map", 3) || TokenMatchI(buff, "clampmap", 8)) {
                            curMap->name = GetNextToken(buff, end);
                        }
                        // 'blendfunc' - Alpha blending mode
                        else if (TokenMatchI(buff, "blendfunc", 9)) {
                            const std::string blend_src = GetNextToken(buff, end);
                            if (blend_src == "add") {
                                curMap->blend_src = Q3Shader::BLEND_GL_ONE;
                                curMap->blend_dest = Q3Shader::BLEND_GL_ONE;
                            } else if (blend_src == "filter") {
                                curMap->blend_src = Q3Shader::BLEND_GL_DST_COLOR;
                                curMap->blend_dest = Q3Shader::BLEND_GL_ZERO;
                            } else if (blend_src == "blend") {
                                curMap->blend_src = Q3Shader::BLEND_GL_SRC_ALPHA;
                                curMap->blend_dest = Q3Shader::BLEND_GL_ONE_MINUS_SRC_ALPHA;
                            } else {