SDL_Flip(3) SDL API Reference SDL_Flip(3)NAME
SDL_Flip - Swaps screen buffers
int SDL_Flip(SDL_Surface *screen);
On hardware that supports double-buffering, this function sets up a flip and returns. The hardware will wait for vertical retrace, and then
swap video buffers before the next video surface blit or lock will return. On hardware that doesn't support double-buffering, this is
equivalent to calling SDL_UpdateRect(screen, 0, 0, 0, 0)
The SDL_DOUBLEBUF flag must have been passed to SDL_SetVideoMode, when setting the video mode for this function to perform hardware flip-
This function returns 0 if successful, or -1 if there was an error.
SDL_SetVideoMode, SDL_UpdateRect, SDL_Surface
SDL Tue 11 Sep 2001, 23:01 SDL_Flip(3)
Check Out this Related Man Page
SDL_SetColors(3) SDL API Reference SDL_SetColors(3)NAME
SDL_SetColors - Sets a portion of the colormap for the given 8-bit surface.
int SDL_SetColors(SDL_Surface *surface, SDL_Color *colors, int firstcolor, int ncolors);
Sets a portion of the colormap for the given 8-bit surface.
When surface is the surface associated with the current display, the display colormap will be updated with the requested colors. If
SDL_HWPALETTE was set in SDL_SetVideoMode flags, SDL_SetColors will always return 1, and the palette is guaranteed to be set the way you
desire, even if the window colormap has to be warped or run under emulation.
The color components of a SDL_Color structure are 8-bits in size, giving you a total of 256^3 =16777216 colors.
Palettized (8-bit) screen surfaces with the SDL_HWPALETTE flag have two palettes, a logical palette that is used for mapping blits to/from
the surface and a physical palette (that determines how the hardware will map the colors to the display). SDL_SetColors modifies both pal-
ettes (if present), and is equivalent to calling SDL_SetPalette with the flags set to (SDL_LOGPAL | SDL_PHYSPAL).
If surface is not a palettized surface, this function does nothing, returning 0. If all of the colors were set as passed to SDL_SetColors,
it will return 1. If not all the color entries were set exactly as given, it will return 0, and you should look at the surface palette to
determine the actual color palette.
/* Create a display surface with a grayscale palette */
/* Fill colors with color information */
/* Create display */
screen=SDL_SetVideoMode(640, 480, 8, SDL_HWPALETTE);
printf("Couldn't set video mode: %s
/* Set palette */
SDL_SetColors(screen, colors, 0, 256);
SDL_Color SDL_Surface, SDL_SetPalette, SDL_SetVideoMode
SDL Tue 11 Sep 2001, 23:01 SDL_SetColors(3)
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