CATEGORY

palette

        $surface->format->palette;

Returns the "SDL_Palette" and SDL::Palette of the format of the surface.

BitsPerPixel

        $surface->format->BitsPerPixel;

The number of bits used to represent each pixel in a surface. Usually 8, 16, 24 or 32. (1 to 7 are not allowed when creating a surface or open a video mode

BytesPerPixel

        $surface->format->BytesPerPixel;

The number of bytes used to represent each pixel in a surface. Usually one to four.

[RGBA]loss

        $surface->format->Rloss; #red   loss
        $surface->format->Bloss; #blue  loss
        $surface->format->Gloss; #green loss    
        $surface->format->Aloss; #alpha loss

Precision loss of each color component (2[RGBA]loss)

[RGBA]shift

        $surface->format->Rshift; #red   shift
        $surface->format->Bshift; #blue  shift
        $surface->format->Gshift; #green shift  
        $surface->format->Ashift; #alpha shift

Binary left shift of each color component in the pixel value

[RGBA]mask

        $surface->format->Rmask; #red   mask
        $surface->format->Bmask; #blue  mask
        $surface->format->Gmask; #green mask    
        $surface->format->Amask; #alpha mask

Binary left shift of each color component in the pixel value

colorkey

        $surface->format->colorkey;

Pixel value of transparent pixels.

alpha

        $surface->format->alpha;

Overall surface alpha value