NAME
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_SetColors 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 automatically 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
common 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
formats.
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