pods::SDL::Surface(3pm) 				User Contributed Perl Documentation				   pods::SDL::Surface(3pm)

NAME

       SDL::Surface - Graphic surface structure

CATEGORY

       Core, Video, Structure

SYNOPSIS

	use SDL;
	use SDL::Video;
	use SDL::Surface;

	# Create the main surface (display)
	SDL::init(SDL_INIT_VIDEO);
	my $display = SDL::Video::set_video_mode(640, 480, 16, SDL_SWSURFACE);

	# Create other surfaces attached to the $display.
	my $surface  = SDL::Surface->new(SDL_ASYNCBLIT | SDL_HWSURFACE, 640, 480, 16, 0, 0, 0, 0);
	my $surface2 = SDL::Surface->new_from($surface, 100, 100, 8, 0, 0, 0, 0);

DESCRIPTION

       An "SDL_Surface" defines a surfaceangular area of pixels.

CONSTANTS

       The constants for SDL::Surface belong to SDL::Video, under the export tag of ':surface'.

       SDL_ASYNCBLIT
	   Use asynchronous blit if possible

       SDL_SWSURFACE
	   Store in system memory

       SDL_HWSURFACE
	   Store in video memory

METHODS

   new
	my $surface = SDL::Surface->new(
	    $flags, $width, $height, $depth, $Rmask, $Gmask, $Bmask, $Amask
	);

       The constructor creates a new surface with the specified parameter values.

       The four mask values are the bits that the channel will ignore.	For example, an Rmask of 0xFF will ignore that channel completely, making
       everything on the surface more green/blue.

   new_from
	my $surface = SDL::Surface->new_from(
	    $surface, $width, $height, $depth, $Rmask, $Gmask, $Bmask, $Amask
	);

       The constructor creates a new surface with the specified parameter values.  The flags are taken from the specified $surface.

   w
	my $w = $surface->w;

       Returns the width of the surface.  SDL::Surface width is defined at construction so this is read-only.

   h
	my $h = $surface->h;

       Returns the height of the surface.  SDL::Surface height is defined at construction so this is read-only.

   format
	my $format = $surface->format;

       The format of the pixels stored in the surface.	See SDL::PixelFormat

   pitch
	my $pitch = $surface->pitch;

       The scanline length in bytes.

Direct Write to Surface Pixel
       Disclaimer: The following methods can be very slow, making them suitable for creating surfaces, but not for animations

   get_pixel
	my $pixel = $surface->get_pixel( $offset )

       Returns the numeric pixel value for the given $offset.  The pixel value depends on current pixel format.

       Note: For surfaces with a palette (1 byte per pixel) the palette index is returned instead of color values.

   set_pixels
	$surface->set_pixels( $offset, $value );

       Sets the pixel $value to the given $offset.  The pixel value must fit the pixel format of the surface.

       Note: For surfaces with a palette (1 byte per pixel) the palette index must be passed instead of color values.

       Example:

	sub putpixel {
	    my ($x, $y, $color) = @_;
	    $display->set_pixels( $x + $y * $display->w, $color);
	}

       See also examples/pixel_operations/sols/ch02.pl!

   get_pixels_ptr
	my $ptr = $surface->get_pixels_ptr;

       Returns a reference to the surface's pixels.

SEE ALSO

       SDL, SDL::PixelFormat, SDL::Video, SDL::Rect

AUTHORS

       See "AUTHORS" in SDL.

perl v5.14.2							    2012-05-28						   pods::SDL::Surface(3pm)