my $surface = SDL::Surface->new( ...
$surface->format; #this returns the PixelFormat object attached to this surface
PixelFormat is only created in a "SDL::Surface". This module only provides getters to the surface's pixelformat. Later on we will provide setting capability.
$surface->format->palette;
Returns the "SDL_Palette" and SDL::Palette of the format of the surface.
$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
$surface->format->BytesPerPixel;
The number of bytes used to represent each pixel in a surface. Usually one to four.
$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)
$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
$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
$surface->format->colorkey;
Pixel value of transparent pixels.
$surface->format->alpha;