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sdl_videomodeok(3) [centos man page]

SDL_VideoModeOK(3)						 SDL API Reference						SDL_VideoModeOK(3)

SDL_VideoModeOK - Check to see if a particular video mode is supported. SYNOPSIS
#include "SDL.h" int SDL_VideoModeOK(int width, int height, int bpp, Uint32 flags); DESCRIPTION
SDL_VideoModeOK returns 0 if the requested mode is not supported under any bit depth, or returns the bits-per-pixel of the closest avail- able mode with the given width, height and requested surface flags (see SDL_SetVideoMode). The bits-per-pixel value returned is only a suggested mode. You can usually request and bpp you want when setting the video mode and SDL will emulate that color depth with a shadow video surface. The arguments to SDL_VideoModeOK are the same ones you would pass to SDL_SetVideoMode EXAMPLE
SDL_Surface *screen; Uint32 bpp; . . . printf("Checking mode 640x480@16bpp. "); bpp=SDL_VideoModeOK(640, 480, 16, SDL_HWSURFACE); if(!bpp){ printf("Mode not available. "); exit(-1); } printf("SDL Recommends 640x480@%dbpp. ", bpp); screen=SDL_SetVideoMode(640, 480, bpp, SDL_HWSURFACE); . . SEE ALSO
SDL_SetVideoMode, SDL_GetVideoInfo SDL
Tue 11 Sep 2001, 23:01 SDL_VideoModeOK(3)

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SDL_SetVideoMode(3)						 SDL API Reference					       SDL_SetVideoMode(3)

SDL_SetVideoMode- Set up a video mode with the specified width, height and bits-per-pixel. SYNOPSIS
#include "SDL.h" SDL_Surface *SDL_SetVideoMode(int width, int height, int bpp, Uint32 flags); DESCRIPTION
Set up a video mode with the specified width, height and bits-per-pixel. If bpp is 0, it is treated as the current display bits per pixel. The flags parameter is the same as the flags field of the SDL_Surface structure. OR'd combinations of the following values are valid. SDL_SWSURFACE Create the video surface in system memory SDL_HWSURFACE Create the video surface in video memory SDL_ASYNCBLIT Enables the use of asynchronous updates of the display surface. This will usually slow down blitting on single CPU machines, but may provide a speed increase on SMP systems. SDL_ANYFORMAT Normally, if a video surface of the requested bits-per-pixel (bpp) is not available, SDL will emulate one with a shadow surface. Passing SDL_ANYFORMAT prevents this and causes SDL to use the video surface, regardless of its pixel depth. SDL_HWPALETTE Give SDL exclusive palette access. Without this flag you may not always get the the colors you request with SDL_SetCol- ors or SDL_SetPalette. SDL_DOUBLEBUF Enable hardware double buffering; only valid with SDL_HWSURFACE. Calling SDL_Flip will flip the buffers and update the screen. All drawing will take place on the surface that is not displayed at the moment. If double buffering could not be enabled then SDL_Flip will just perform a SDL_UpdateRect on the entire screen. SDL_FULLSCREEN SDL will attempt to use a fullscreen mode. If a hardware resolution change is not possible (for whatever reason), the next higher resolution will be used and the display window centered on a black background. SDL_OPENGL Create an OpenGL rendering context. You should have previously set OpenGL video attributes with SDL_GL_SetAttribute. SDL_OPENGLBLIT Create an OpenGL rendering context, like above, but allow normal blitting operations. The screen (2D) surface may have an alpha channel, and SDL_UpdateRects must be used for updating changes to the screen surface. SDL_RESIZABLE Create a resizable window. When the window is resized by the user a SDL_VIDEORESIZE event is generated and SDL_SetVideoMode can be called again with the new size. SDL_NOFRAME If possible, SDL_NOFRAME causes SDL to create a window with no title bar or frame decoration. Fullscreen modes automat- ically have this flag set. Note: Whatever flags SDL_SetVideoMode could satisfy are set in the flags member of the returned surface. Note: The bpp parameter is the number of bits per pixel, so a bpp of 24 uses the packed representation of 3 bytes/pixel. For the more com- mon 4 bytes/pixel mode, use a bpp of 32. Somewhat oddly, both 15 and 16 will request a 2 bytes/pixel mode, but different pixel for- mats. RETURN VALUE
The framebuffer surface, or NULL if it fails. The surface returned is freed by SDL_Quit() and should nt be freed by the caller. SEE ALSO
SDL_LockSurface, SDL_SetColors, SDL_Flip, SDL_Surface SDL
Tue 11 Sep 2001, 23:01 SDL_SetVideoMode(3)
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