Rendering Context: GtkGLExt Reference Manual

Rendering Context

Rendering Context — OpenGL rendering context object

Functions

GdkGLContext *	gdk_gl_context_new ()
void	gdk_gl_context_destroy ()
gboolean	gdk_gl_context_copy ()
GdkGLDrawable *	gdk_gl_context_get_gl_drawable ()
GdkGLConfig *	gdk_gl_context_get_gl_config ()
GdkGLContext *	gdk_gl_context_get_share_list ()
gboolean	gdk_gl_context_is_direct ()
int	gdk_gl_context_get_render_type ()
GdkGLContext *	gdk_gl_context_get_current ()

Types and Values

GdkGLContext

Object Hierarchy

    GObject
    ╰── GdkGLContext

Includes

#include <gdk/gdkgl.h>

Description

Functions

gdk_gl_context_new ()

GdkGLContext *
gdk_gl_context_new (GdkGLDrawable *gldrawable,
                    GdkGLContext *share_list,
                    gboolean direct,
                    int render_type);

Creates a new OpenGL rendering context.

Parameters

gldrawable	a GdkGLDrawable.
share_list	the GdkGLContext with which to share display lists and texture objects. NULL indicates that no sharing is to take place.
direct	whether rendering is to be done with a direct connection to the graphics system.
render_type	GDK_GL_RGBA_TYPE or GDK_GL_COLOR_INDEX_TYPE (currently not used).

Returns

the new GdkGLContext.

gdk_gl_context_destroy ()

void
gdk_gl_context_destroy (GdkGLContext *glcontext);

Destroys the OpenGL resources associated with glcontext and decrements glcontext 's reference count.

Parameters

glcontext

a GdkGLContext.

gdk_gl_context_copy ()

gboolean
gdk_gl_context_copy (GdkGLContext *glcontext,
                     GdkGLContext *src,
                     unsigned long  mask);

Copy state from src rendering context to glcontext .

mask contains the bitwise-OR of the same symbolic names that are passed to the glPushAttrib() function. You can use GL_ALL_ATTRIB_BITS to copy all the rendering state information.

Parameters

glcontext	a GdkGLContext.
src	the source context.
mask	which portions of `src` state are to be copied to `glcontext` .

Returns

FALSE if it fails, TRUE otherwise.

gdk_gl_context_get_gl_drawable ()

GdkGLDrawable *
gdk_gl_context_get_gl_drawable (GdkGLContext *glcontext);

Gets GdkGLDrawable to which the glcontext is bound.

Parameters

glcontext

a GdkGLContext.

Returns

the GdkGLDrawable or NULL if no GdkGLDrawable is bound.

gdk_gl_context_get_gl_config ()

GdkGLConfig *
gdk_gl_context_get_gl_config (GdkGLContext *glcontext);

Gets GdkGLConfig with which the glcontext is configured.

Parameters

glcontext

a GdkGLContext.

Returns

the GdkGLConfig.

gdk_gl_context_get_share_list ()

GdkGLContext *
gdk_gl_context_get_share_list (GdkGLContext *glcontext);

Gets GdkGLContext with which the glcontext shares the display lists and texture objects.

Parameters

glcontext

a GdkGLContext.

Returns

the GdkGLContext.

gdk_gl_context_is_direct ()

gboolean
gdk_gl_context_is_direct (GdkGLContext *glcontext);

Returns whether the glcontext is a direct rendering context.

Parameters

glcontext

a GdkGLContext.

Returns

TRUE if the glcontext is a direct rendering contest.

gdk_gl_context_get_render_type ()

int
gdk_gl_context_get_render_type (GdkGLContext *glcontext);

Gets render_type of the glcontext .

Parameters

glcontext

a GdkGLContext.

Returns

GDK_GL_RGBA_TYPE or GDK_GL_COLOR_INDEX_TYPE.

gdk_gl_context_get_current ()

GdkGLContext *
gdk_gl_context_get_current (void);

Returns the current GdkGLContext.

Returns

the current GdkGLContext or NULL if there is no current context.

Types and Values

GdkGLContext

typedef struct _GdkGLContext GdkGLContext;