GL Load C interface

The C interface for initializing OpenGL.

Enumerations
enum	{ ogl_LOAD_FAILED = 0, ogl_LOAD_SUCCEEDED }
	The loading status returned by the loading functions. More...
enum	{ wgl_LOAD_FAILED = 0, wgl_LOAD_SUCCEEDED }
	The loading status returned by the loading functions. More...
enum	{ glx_LOAD_FAILED = 0, glx_LOAD_SUCCEEDED }
	The loading status returned by the loading functions. More...

Functions
int	ogl_LoadFunctions ()
	Loads all of the function pointers available. More...
int	ogl_GetMajorVersion ()
int	ogl_GetMinorVersion ()
int	ogl_IsVersionGEQ (int testMajorVersion, int testMinorVersion)
int	wgl_LoadFunctions (HDC hdc)
	Loads all of the function pointers available. More...
int	glx_LoadFunctions (Display *display, int screen)
	Loads all of the function pointers available. More...

Enumeration Type Documentation

anonymous enum

The loading status returned by the loading functions.

Enumerator
ogl_LOAD_FAILED	Failed to load entirely.
ogl_LOAD_SUCCEEDED	At least partially succeded.

anonymous enum

The loading status returned by the loading functions.

Enumerator
wgl_LOAD_FAILED	Failed to load entirely.
wgl_LOAD_SUCCEEDED	At least partially succeded.

anonymous enum

The loading status returned by the loading functions.

Enumerator
glx_LOAD_FAILED	Failed to load entirely.
glx_LOAD_SUCCEEDED	At least partially succeded.

Function Documentation

int glx_LoadFunctions	(	Display *	display,
		int	screen
	)

Loads all of the function pointers available.

Loads function pointers for GLX extensions.

Returns

Will return glx_LOAD_FAILED if the loading failed entirely and nothing was loaded. Returns glx_LOAD_SUCCEEDED if the loading process worked as planned. If it is neither, then the (return value - glx_LOAD_SUCCEEDED) is the number of core functions that fialed to load.

int ogl_GetMajorVersion

(

)

This function retrieves the major GL version number. Only works after LoadFunctions has been called.

int ogl_GetMinorVersion

(

)

This function retrieves the minor GL version number. Only works after LoadFunctions has been called.

int ogl_IsVersionGEQ	(	int	testMajorVersion,
		int	testMinorVersion
	)

Returns non-zero if the current GL version is greater than or equal to the given version.

int ogl_LoadFunctions

(

)

Loads all of the function pointers available.

Loads function pointers for OpenGL. This function will also load the core OpenGL functions (ie: not in extensions). It will only load the version and profile specified by the current OpenGL context. So if you get a 3.2 compatibility context, then it will load only try to load 3.2 compatibility in addition to any available extensions.

Returns

Will return ogl_LOAD_FAILED if the loading failed entirely and nothing was loaded. Returns ogl_LOAD_SUCCEEDED if the loading process worked as planned. If it is neither, then the (return value - ogl_LOAD_SUCCEEDED) is the number of core functions that fialed to load.

int wgl_LoadFunctions

(

HDC

hdc

)

Loads all of the function pointers available.

Loads function pointers for WGL extensions.

Returns

Will return wgl_LOAD_FAILED if the loading failed entirely and nothing was loaded. Returns wgl_LOAD_SUCCEEDED if the loading process worked as planned. If it is neither, then the (return value - wgl_LOAD_SUCCEEDED) is the number of core functions that fialed to load.