Blank Surface

SDL Development
1

Hey, could someone post code for creating a blank
surface?

Thanks__________________________________________________
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2

Hey, could someone post code for creating a blank surface?

Assuming you want it in the same format as the screen format, which you’ve
already initialised, the following function should do what you want:

SDL_Surface *create_blank_surface (int width, int height)
{
SDL_Surface *surface = NULL;
SDL_Surface *screen = SDL_GetVideoSurface();

// create the new surface
surface = SDL_CreateRGBSurface (screen->flags, width, height,
screen->format->BitsPerPixel,
screen->format->Rmask,
screen->format->Gmask,
screen->format->Bmask,
screen->format->Amask);

// fill the new surface with black
if (surface != NULL)
SDL_FillRect (surface, NULL, Map_RGB(surface->format, 0x0,0x0,0x0));

return surface;

} // end create_blank_surface()

Instead of just using the screen’s flags, you might want to modify the above
function to let you pass your own in; you may also want to be using Map_RGBA()
if you’re using alpha.

Hope this is what you’re looking for :-)On Thu, 3 Jan 2002, Red wrote:

–
Mike.

3

Mike wrote:

// fill the new surface with black
if (surface != NULL)
SDL_FillRect (surface, NULL, Map_RGB(surface->format, 0x0,0x0,0x0));

SDL_CreateRGBSurface fills newly created software surfaces with zeroes so
this isn’t strictly needed

4

Hey, thanks a lot the code worked perfectly. Now I
need to know if there’s a way to output text with sdl.

Herbert__________________________________________________
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