SDL_CreateRGBSurface man page on JazzOS

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SDL_CreateRGBSurface(3)	       SDL API Reference       SDL_CreateRGBSurface(3)

       SDL_CreateRGBSurface - Create an empty SDL_Surface

       #include "SDL.h"

       SDL_Surface  *SDL_CreateRGBSurface(Uint32 flags, int width, int height,
       int depth, Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask);

       Allocate an empty surface (must be called after SDL_SetVideoMode)

       If depth is 8 bits an empty palette is allocated for the surface,  oth‐
       erwise	a   'packed-pixel'   SDL_PixelFormat   is  created  using  the
       [RGBA]mask's provided (see SDL_PixelFormat). The	 flags	specifies  the
       type  of	 surface  that should be created, it is an OR'd combination of
       the following possible values.

       SDL_SWSURFACE	   SDL will create the surface in system memory.  This
			   improves  the  performance  of  pixel level access,
			   however you may not be able to  take	 advantage  of
			   some types of hardware blitting.

       SDL_HWSURFACE	   SDL	will  attempt  to  create the surface in video
			   memory. This will allow SDL to  take	 advantage  of
			   Video->Video blits (which are often accelerated).

       SDL_SRCCOLORKEY	   This flag turns on colourkeying for blits from this
			   surface. If SDL_HWSURFACE  is  also	specified  and
			   colourkeyed	blits  are  hardware-accelerated, then
			   SDL will attempt to place the surface in video mem‐
			   ory.	 Use SDL_SetColorKey to set or clear this flag
			   after surface creation.

       SDL_SRCALPHA	   This flag turns on alpha-blending  for  blits  from
			   this	 surface.  If  SDL_HWSURFACE is also specified
			   and alpha-blending blits are	 hardware-accelerated,
			   then	 the surface will be placed in video memory if
			   possible. Use SDL_SetAlpha to  set  or  clear  this
			   flag after surface creation.


	      If an alpha-channel is specified (that is, if Amask is nonzero),
	      then the SDL_SRCALPHA flag is automatically set. You may	remove
	      this flag by calling SDL_SetAlpha after surface creation.

       Returns the created surface, or NULL upon error.

	   /* Create a 32-bit surface with the bytes of each pixel in R,G,B,A order,
	      as expected by OpenGL for textures */
	   SDL_Surface *surface;
	   Uint32 rmask, gmask, bmask, amask;

	   /* SDL interprets each pixel as a 32-bit number, so our masks must depend
	      on the endianness (byte order) of the machine */
	   rmask = 0xff000000;
	   gmask = 0x00ff0000;
	   bmask = 0x0000ff00;
	   amask = 0x000000ff;
	   rmask = 0x000000ff;
	   gmask = 0x0000ff00;
	   bmask = 0x00ff0000;
	   amask = 0xff000000;

	   surface = SDL_CreateRGBSurface(SDL_SWSURFACE, width, height, 32,
					  rmask, gmask, bmask, amask);
	   if(surface == NULL) {
	       fprintf(stderr, "CreateRGBSurface failed: %s
       ", SDL_GetError());

       SDL_CreateRGBSurfaceFrom,  SDL_FreeSurface, SDL_SetVideoMode, SDL_Lock‐
       Surface, SDL_PixelFormat, SDL_Surface SDL_SetAlpha SDL_SetColorKey

SDL			    Tue 11 Sep 2001, 23:01     SDL_CreateRGBSurface(3)

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