Mercurial > sdl-ios-xcode
annotate docs/man3/SDL_GL_SetAttribute.3 @ 890:416158ec61a0
Date: Sat, 10 Apr 2004 10:05:46 +0200
From: Christian Walther
Subject: [SDL] OpenGL Accumulation Buffer on Mac OS X
Is there a reason for not having OpenGL accumulation buffer support in
SDL 1.2.7 (and as far as I have checked also in the current CVS) on Mac OS
X?
Maybe I am doing something wrong, but it seems very easy to add (at least
it works for for me in 10.3.3) - just add
if ( this->gl_config.accum_red_size + this->gl_config.accum_green_size + this->gl_config.accum_blue_size + this->gl_config.accum_alpha_size > 0) {
attr[i++] = NSOpenGLPFAAccumSize;
attr[i++] = this->gl_config.accum_red_size + this->gl_config.accum_green_size + this->gl_config.accum_blue_size + this->gl_config.accum_alpha_size;
}
to QZ_SetupOpenGL() in SDL_QuartzGL.m
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 16 May 2004 18:06:27 +0000 |
| parents | e5bc29de3f0a |
| children | 546f7c1eb755 |
| rev | line source |
|---|---|
|
181
e5bc29de3f0a
Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
1 .TH "SDL_GL_SetAttribute" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" |
| 0 | 2 .SH "NAME" |
| 3 SDL_GL_SetAttribute\- Set a special SDL/OpenGL attribute | |
| 4 .SH "SYNOPSIS" | |
| 5 .PP | |
| 6 \fB#include "SDL\&.h" | |
| 7 .sp | |
| 8 \fBint \fBSDL_GL_SetAttribute\fP\fR(\fBSDL_GLattr attr, int value\fR); | |
| 9 .SH "DESCRIPTION" | |
| 10 .PP | |
| 11 Sets the OpenGL \fIattribute\fR \fBattr\fR to \fBvalue\fR\&. The attributes you set don\&'t take effect until after a call to \fI\fBSDL_SetVideoMode\fP\fR\&. You should use \fI\fBSDL_GL_GetAttribute\fP\fR to check the values after a \fBSDL_SetVideoMode\fP call\&. | |
| 12 .SH "RETURN VALUE" | |
| 13 .PP | |
| 14 Returns \fB0\fR on success, or \fB-1\fR on error\&. | |
| 15 .SH "EXAMPLE" | |
| 16 .PP | |
| 17 .nf | |
| 18 \f(CWSDL_GL_SetAttribute( SDL_GL_RED_SIZE, 5 ); | |
| 19 SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 5 ); | |
| 20 SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 5 ); | |
| 21 SDL_GL_SetAttribute( SDL_GL_DEPTH_SIZE, 16 ); | |
| 22 SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 ); | |
| 23 if ( (screen=SDL_SetVideoMode( 640, 480, 16, SDL_OPENGL )) == NULL ) { | |
| 24 fprintf(stderr, "Couldn\&'t set GL mode: %s | |
| 25 ", SDL_GetError()); | |
| 26 SDL_Quit(); | |
| 27 return; | |
| 28 }\fR | |
| 29 .fi | |
| 30 .PP | |
| 31 .PP | |
| 32 .RS | |
| 33 \fBNote: | |
| 34 .PP | |
| 35 The \fBSDL_DOUBLEBUF\fP flag is not required to enable double buffering when setting an OpenGL video mode\&. Double buffering is enabled or disabled using the SDL_GL_DOUBLEBUFFER attribute\&. | |
| 36 .RE | |
| 37 .SH "SEE ALSO" | |
| 38 .PP | |
| 39 \fI\fBSDL_GL_GetAttribute\fP\fR, \fIGL Attributes\fR | |
|
181
e5bc29de3f0a
Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
40 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01 |