Loading XPM data into SDL2 texture.

xpm2sdl

SDL_Texture * Sprite::load(SDL_Renderer * renderer, const char ** xpm, int size)
{
    SDL_Texture * result = 0;
    try {
        std::vector<std::string> xpm_lines(xpm, xpm + size);
        Chthon::Pixmap pixmap;
        pixmap.load(xpm_lines);
        SDL_Surface * surface = SDL_CreateRGBSurface(SDL_SWSURFACE,
                pixmap.pixels.width(), pixmap.pixels.height(), 32,
                0x00ff0000,
                0x0000ff00,
                0x000000ff,
                0xff000000
                );
        if(SDL_MUSTLOCK(surface)) {
            SDL_LockSurface(surface);
        }
        for(unsigned x = 0; x < pixmap.pixels.width(); ++x) {
            for(unsigned y = 0; y < pixmap.pixels.height(); ++y) {
                Uint8 * pixel = (Uint8*)surface->pixels;
                pixel += (y * surface->pitch) + (x * sizeof(Uint32));
                Uint32 c = pixmap.palette[(pixmap.pixels.cell(x, y))];
                *((Uint32*)pixel) = c;
            }
        }
        if(SDL_MUSTLOCK(surface)) {
            SDL_UnlockSurface(surface);
        }
        result = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STATIC, pixmap.pixels.width(), pixmap.pixels.height());
        SDL_UpdateTexture(result, 0, surface->pixels, surface->pitch);
        SDL_SetTextureBlendMode(result, SDL_BLENDMODE_BLEND);
    } catch(const Chthon::Pixmap::Exception & e) {
        std::cerr << e.what << std::endl;
    }
    return result;
}