Mercurial > sdl-ios-xcode
annotate docs/man3/SDL_GL_GetProcAddress.3 @ 3197:434ce3242e1c
Alexei Tereschenko
Why not to use hardware vertex processing instead of software one if
it is available in D3D render driver? With hardware processing
testsprite2 runs three times faster on all videocards which I could
test.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Tue, 16 Jun 2009 14:34:15 +0000 |
parents | 546f7c1eb755 |
children | 1238da4a7112 |
rev | line source |
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Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
parents:
55
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1 .TH "SDL_GL_GetProcAddress" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" |
0 | 2 .SH "NAME" |
2283
546f7c1eb755
Merged revision 3472 from SDL 1.2, fixing bug #493
Sam Lantinga <slouken@libsdl.org>
parents:
181
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changeset
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3 SDL_GL_GetProcAddress \- Get the address of a GL function |
0 | 4 .SH "SYNOPSIS" |
5 .PP | |
6 \fB#include "SDL\&.h" | |
7 .sp | |
8 \fBvoid *\fBSDL_GL_GetProcAddress\fP\fR(\fBconst char* proc\fR); | |
9 .SH "DESCRIPTION" | |
10 .PP | |
11 Returns the address of the GL function \fBproc\fR, or \fBNULL\fR if the function is not found\&. If the GL library is loaded at runtime, with \fI\fBSDL_GL_LoadLibrary\fP\fR, then \fIall\fP GL functions must be retrieved this way\&. Usually this is used to retrieve function pointers to OpenGL extensions\&. | |
12 .SH "EXAMPLE" | |
13 .PP | |
14 .nf | |
15 \f(CWtypedef void (*GL_ActiveTextureARB_Func)(unsigned int); | |
16 GL_ActiveTextureARB_Func glActiveTextureARB_ptr = 0; | |
17 int has_multitexture=1; | |
18 \&. | |
19 \&. | |
20 \&. | |
21 /* Get function pointer */ | |
22 glActiveTextureARB_ptr=(GL_ActiveTextureARB_Func) SDL_GL_GetProcAddress("glActiveTextureARB"); | |
23 | |
24 /* Check for a valid function ptr */ | |
25 if(!glActiveTextureARB_ptr){ | |
26 fprintf(stderr, "Multitexture Extensions not present\&. | |
27 "); | |
28 has_multitexture=0; | |
29 } | |
30 \&. | |
31 \&. | |
32 \&. | |
33 \&. | |
34 if(has_multitexture){ | |
35 glActiveTextureARB_ptr(GL_TEXTURE0_ARB); | |
36 \&. | |
37 \&. | |
38 } | |
39 else{ | |
40 \&. | |
41 \&. | |
42 }\fR | |
43 .fi | |
44 .PP | |
45 .SH "SEE ALSO" | |
46 .PP | |
47 \fI\fBSDL_GL_LoadLibrary\fP\fR | |
181
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Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
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48 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01 |