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Date: Tue, 13 Jan 2004 19:25:37 +0300 From: Dmitry Yakimov Subject: [SDL] [PATCH] SDL bug patch Let me introduce 2 fixes to SDL. 1. Preventing great slowdown on fast machines while hardware flipping (it's obviously bug). 2. Setting up 85 Hz of monitor if supported. The reason is that Win98 by default sets lowest frequency 60 Hz. And we can't set up maximum frequency because some users can have wrong monitor drivers. This is important for shareware and commercial programs.
author Sam Lantinga <slouken@libsdl.org>
date Wed, 11 Feb 2004 16:10:16 +0000 (2004-02-11)
parents 355632dca928
children
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<HTML
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><TITLE
>SDL_VideoModeOK</TITLE
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><H1
><A
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>SDL_VideoModeOK</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN1202"
></A
><H2
>Name</H2
>SDL_VideoModeOK&nbsp;--&nbsp;Check to see if a particular video mode is supported.</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN1205"
></A
><H2
>Synopsis</H2
><DIV
CLASS="FUNCSYNOPSIS"
><A
NAME="AEN1206"
></A
><P
></P
><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>int <B
CLASS="FSFUNC"
>SDL_VideoModeOK</B
></CODE
>(int width, int height, int bpp, Uint32 flags);</CODE
></P
><P
></P
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN1212"
></A
><H2
>Description</H2
><P
><TT
CLASS="FUNCTION"
>SDL_VideoModeOK</TT
> returns <SPAN
CLASS="RETURNVALUE"
>0</SPAN
> 
if the requested mode is not supported under any bit depth, or returns the 
bits-per-pixel of the closest available mode with the given width, height and requested <A
HREF="sdlsurface.html"
>surface</A
> flags (see <A
HREF="sdlsetvideomode.html"
><TT
CLASS="FUNCTION"
>SDL_SetVideoMode</TT
></A
>).</P
><P
>The bits-per-pixel value returned is only a suggested mode. You can usually request and bpp you want when <A
HREF="sdlsetvideomode.html"
>setting</A
>  the video mode and SDL will emulate that color depth with a shadow video surface.</P
><P
>The arguments to <TT
CLASS="FUNCTION"
>SDL_VideoModeOK</TT
> are the same ones you 
would pass to <A
HREF="sdlsetvideomode.html"
>SDL_SetVideoMode</A
></P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN1225"
></A
><H2
>Example</H2
><PRE
CLASS="PROGRAMLISTING"
>SDL_Surface *screen;
Uint32 bpp;
.
.
.
printf("Checking mode 640x480@16bpp.\n");
bpp=SDL_VideoModeOK(640, 480, 16, SDL_HWSURFACE);

if(!bpp){
  printf("Mode not available.\n");
  exit(-1);
}

printf("SDL Recommends 640x480@%dbpp.\n", bpp);
screen=SDL_SetVideoMode(640, 480, bpp, SDL_HWSURFACE);
.
.</PRE
></DIV
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><A
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></A
><H2
>See Also</H2
><P
><A
HREF="sdlsetvideomode.html"
><TT
CLASS="FUNCTION"
>SDL_SetVideoMode</TT
></A
>,
<A
HREF="sdlgetvideoinfo.html"
><TT
CLASS="FUNCTION"
>SDL_GetVideoInfo</TT
></A
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