[sdl_omap.git] / docs / man3 / SDL_GL_GetProcAddress.3

.TH "SDL_GL_GetProcAddress" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" 
.SH "NAME"
SDL_GL_GetProcAddress \- Get the address of a GL function
.SH "SYNOPSIS"
.PP
\fB#include "SDL\&.h"
.sp
\fBvoid *\fBSDL_GL_GetProcAddress\fP\fR(\fBconst char* proc\fR);
.SH "DESCRIPTION"
.PP
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\&.
.SH "EXAMPLE"
.PP
.nf
\f(CWtypedef void (*GL_ActiveTextureARB_Func)(unsigned int);
GL_ActiveTextureARB_Func glActiveTextureARB_ptr = 0;
int has_multitexture=1;
\&.
\&.
\&.
/* Get function pointer */
glActiveTextureARB_ptr=(GL_ActiveTextureARB_Func) SDL_GL_GetProcAddress("glActiveTextureARB");

/* Check for a valid function ptr */
if(!glActiveTextureARB_ptr){
  fprintf(stderr, "Multitexture Extensions not present\&.
");
  has_multitexture=0;
}
\&.
\&.
\&.
\&.
if(has_multitexture){
  glActiveTextureARB_ptr(GL_TEXTURE0_ARB);
  \&.
  \&.
}
else{
  \&.
  \&.
}\fR
.fi
.PP
.SH "SEE ALSO"
.PP
\fI\fBSDL_GL_LoadLibrary\fP\fR
.\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01
Commit	Line	Data
e14743d1	1	.TH "SDL_GL_GetProcAddress" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference"
	2	.SH "NAME"
	3	SDL_GL_GetProcAddress \- Get the address of a GL function
	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
	48	.\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01