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mutter/cogl/winsys/cogl-winsys-egl-x11.c
Neil Roberts 181b875a3d xlib: Internally retrieve XEvents 
Previously we relied on the application to send all X events through
Cogl using cogl_xlib_renderer_handle_event. This breaks the
abstraction that an application shouldn't need to know what winsys
Cogl is using. Now that we have main loop integreation in Cogl, the
Xlib-based winsys's can report that Cogl needs to block on the file
descriptor of the X connection and it can manually handle the
events.

The event retrieval can be disabled by an application if it calls the
new cogl_xlib_renderer_set_event_retrieval_enabled() function. The
event retrieval will also automatically be disabled if the application
sets a foreign display.

Reviewed-by: Robert Bragg <robert@linux.intel.com>
2012-01-05 13:40:24 +00:00

759 lines
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/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2011 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
*
* Authors:
* Robert Bragg <robert@linux.intel.com>
* Neil Roberts <neil@linux.intel.com>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <X11/Xlib.h>
#include "cogl-winsys-egl-x11-private.h"
#include "cogl-winsys-egl-private.h"
#include "cogl-xlib-renderer-private.h"
#include "cogl-xlib-renderer.h"
#include "cogl-framebuffer-private.h"
#include "cogl-onscreen-private.h"
#include "cogl-display-private.h"
#include "cogl-renderer-private.h"
#include "cogl-texture-pixmap-x11-private.h"
#include "cogl-texture-2d-private.h"
#define COGL_ONSCREEN_X11_EVENT_MASK StructureNotifyMask
static const CoglWinsysEGLVtable _cogl_winsys_egl_vtable;
typedef struct _CoglDisplayXlib
{
Window dummy_xwin;
} CoglDisplayXlib;
typedef struct _CoglOnscreenXlib
{
Window xwin;
gboolean is_foreign_xwin;
} CoglOnscreenXlib;
#ifdef EGL_KHR_image_pixmap
typedef struct _CoglTexturePixmapEGL
{
EGLImageKHR image;
CoglTexture *texture;
} CoglTexturePixmapEGL;
#endif
static CoglOnscreen *
find_onscreen_for_xid (CoglContext *context, guint32 xid)
{
GList *l;
for (l = context->framebuffers; l; l = l->next)
{
CoglFramebuffer *framebuffer = l->data;
CoglOnscreenEGL *egl_onscreen;
CoglOnscreenXlib *xlib_onscreen;
if (!framebuffer->type == COGL_FRAMEBUFFER_TYPE_ONSCREEN)
continue;
egl_onscreen = COGL_ONSCREEN (framebuffer)->winsys;
xlib_onscreen = egl_onscreen->platform;
if (xlib_onscreen->xwin == (Window)xid)
return COGL_ONSCREEN (framebuffer);
}
return NULL;
}
static CoglFilterReturn
event_filter_cb (XEvent *xevent, void *data)
{
CoglContext *context = data;
if (xevent->type == ConfigureNotify)
{
CoglOnscreen *onscreen =
find_onscreen_for_xid (context, xevent->xconfigure.window);
if (onscreen)
{
CoglFramebuffer *framebuffer = COGL_FRAMEBUFFER (onscreen);
_cogl_framebuffer_winsys_update_size (framebuffer,
xevent->xconfigure.width,
xevent->xconfigure.height);
}
}
return COGL_FILTER_CONTINUE;
}
static XVisualInfo *
get_visual_info (CoglDisplay *display, EGLConfig egl_config)
{
CoglXlibRenderer *xlib_renderer =
_cogl_xlib_renderer_get_data (display->renderer);
CoglRendererEGL *egl_renderer = display->renderer->winsys;
XVisualInfo visinfo_template;
int template_mask = 0;
XVisualInfo *visinfo = NULL;
int visinfos_count;
EGLint visualid, red_size, green_size, blue_size, alpha_size;
eglGetConfigAttrib (egl_renderer->edpy, egl_config,
EGL_NATIVE_VISUAL_ID, &visualid);
if (visualid != 0)
{
visinfo_template.visualid = visualid;
template_mask |= VisualIDMask;
}
else
{
/* some EGL drivers don't implement the EGL_NATIVE_VISUAL_ID
* attribute, so attempt to find the closest match. */
eglGetConfigAttrib (egl_renderer->edpy, egl_config,
EGL_RED_SIZE, &red_size);
eglGetConfigAttrib (egl_renderer->edpy, egl_config,
EGL_GREEN_SIZE, &green_size);
eglGetConfigAttrib (egl_renderer->edpy, egl_config,
EGL_BLUE_SIZE, &blue_size);
eglGetConfigAttrib (egl_renderer->edpy, egl_config,
EGL_ALPHA_SIZE, &alpha_size);
visinfo_template.depth = red_size + green_size + blue_size + alpha_size;
template_mask |= VisualDepthMask;
visinfo_template.screen = DefaultScreen (xlib_renderer->xdpy);
template_mask |= VisualScreenMask;
}
visinfo = XGetVisualInfo (xlib_renderer->xdpy,
template_mask,
&visinfo_template,
&visinfos_count);
return visinfo;
}
static void
_cogl_winsys_renderer_disconnect (CoglRenderer *renderer)
{
CoglRendererEGL *egl_renderer = renderer->winsys;
_cogl_xlib_renderer_disconnect (renderer);
eglTerminate (egl_renderer->edpy);
g_slice_free (CoglRendererEGL, egl_renderer);
}
static gboolean
_cogl_winsys_renderer_connect (CoglRenderer *renderer,
GError **error)
{
CoglRendererEGL *egl_renderer;
CoglXlibRenderer *xlib_renderer;
renderer->winsys = g_slice_new0 (CoglRendererEGL);
egl_renderer = renderer->winsys;
xlib_renderer = _cogl_xlib_renderer_get_data (renderer);
egl_renderer->platform_vtable = &_cogl_winsys_egl_vtable;
if (!_cogl_xlib_renderer_connect (renderer, error))
goto error;
egl_renderer->edpy =
eglGetDisplay ((NativeDisplayType) xlib_renderer->xdpy);
if (!_cogl_winsys_egl_renderer_connect_common (renderer, error))
goto error;
return TRUE;
error:
_cogl_winsys_renderer_disconnect (renderer);
return FALSE;
}
static gboolean
_cogl_winsys_egl_display_setup (CoglDisplay *display,
GError **error)
{
CoglDisplayEGL *egl_display = display->winsys;
CoglDisplayXlib *xlib_display;
xlib_display = g_slice_new0 (CoglDisplayXlib);
egl_display->platform = xlib_display;
return TRUE;
}
static void
_cogl_winsys_egl_display_destroy (CoglDisplay *display)
{
CoglDisplayEGL *egl_display = display->winsys;
g_slice_free (CoglDisplayXlib, egl_display->platform);
}
static gboolean
_cogl_winsys_egl_context_init (CoglContext *context,
GError **error)
{
cogl_xlib_renderer_add_filter (context->display->renderer,
event_filter_cb,
context);
context->feature_flags |= COGL_FEATURE_ONSCREEN_MULTIPLE;
COGL_FLAGS_SET (context->features,
COGL_FEATURE_ID_ONSCREEN_MULTIPLE, TRUE);
COGL_FLAGS_SET (context->winsys_features,
COGL_WINSYS_FEATURE_MULTIPLE_ONSCREEN,
TRUE);
return TRUE;
}
static void
_cogl_winsys_egl_context_deinit (CoglContext *context)
{
cogl_xlib_renderer_remove_filter (context->display->renderer,
event_filter_cb,
context);
}
static gboolean
_cogl_winsys_egl_onscreen_init (CoglOnscreen *onscreen,
EGLConfig egl_config,
GError **error)
{
CoglFramebuffer *framebuffer = COGL_FRAMEBUFFER (onscreen);
CoglContext *context = framebuffer->context;
CoglDisplay *display = context->display;
CoglRenderer *renderer = display->renderer;
CoglRendererEGL *egl_renderer = renderer->winsys;
CoglXlibRenderer *xlib_renderer =
_cogl_xlib_renderer_get_data (renderer);
CoglOnscreenXlib *xlib_onscreen;
CoglOnscreenEGL *egl_onscreen = onscreen->winsys;
Window xwin;
/* FIXME: We need to explicitly Select for ConfigureNotify events.
* For foreign windows we need to be careful not to mess up any
* existing event mask.
* We need to document that for windows we create then toolkits
* must be careful not to clear event mask bits that we select.
*/
/* XXX: Note we ignore the user's original width/height when
* given a foreign X window. */
if (onscreen->foreign_xid)
{
Status status;
CoglXlibTrapState state;
XWindowAttributes attr;
int xerror;
xwin = onscreen->foreign_xid;
_cogl_xlib_renderer_trap_errors (display->renderer, &state);
status = XGetWindowAttributes (xlib_renderer->xdpy, xwin, &attr);
xerror = _cogl_xlib_renderer_untrap_errors (display->renderer,
&state);
if (status == 0 || xerror)
{
char message[1000];
XGetErrorText (xlib_renderer->xdpy, xerror,
message, sizeof (message));
g_set_error (error, COGL_WINSYS_ERROR,
COGL_WINSYS_ERROR_CREATE_ONSCREEN,
"Unable to query geometry of foreign "
"xid 0x%08lX: %s",
xwin, message);
return FALSE;
}
_cogl_framebuffer_winsys_update_size (framebuffer,
attr.width, attr.height);
/* Make sure the app selects for the events we require... */
onscreen->foreign_update_mask_callback (onscreen,
COGL_ONSCREEN_X11_EVENT_MASK,
onscreen->
foreign_update_mask_data);
}
else
{
int width;
int height;
CoglXlibTrapState state;
XVisualInfo *xvisinfo;
XSetWindowAttributes xattr;
unsigned long mask;
int xerror;
width = cogl_framebuffer_get_width (framebuffer);
height = cogl_framebuffer_get_height (framebuffer);
_cogl_xlib_renderer_trap_errors (display->renderer, &state);
xvisinfo = get_visual_info (display, egl_config);
if (xvisinfo == NULL)
{
g_set_error (error, COGL_WINSYS_ERROR,
COGL_WINSYS_ERROR_CREATE_ONSCREEN,
"Unable to retrieve the X11 visual of context's "
"fbconfig");
return FALSE;
}
/* window attributes */
xattr.background_pixel =
WhitePixel (xlib_renderer->xdpy,
DefaultScreen (xlib_renderer->xdpy));
xattr.border_pixel = 0;
/* XXX: is this an X resource that we are leaking‽... */
xattr.colormap =
XCreateColormap (xlib_renderer->xdpy,
DefaultRootWindow (xlib_renderer->xdpy),
xvisinfo->visual,
AllocNone);
xattr.event_mask = COGL_ONSCREEN_X11_EVENT_MASK;
mask = CWBorderPixel | CWColormap | CWEventMask;
xwin = XCreateWindow (xlib_renderer->xdpy,
DefaultRootWindow (xlib_renderer->xdpy),
0, 0,
width, height,
0,
xvisinfo->depth,
InputOutput,
xvisinfo->visual,
mask, &xattr);
XFree (xvisinfo);
XSync (xlib_renderer->xdpy, False);
xerror =
_cogl_xlib_renderer_untrap_errors (display->renderer, &state);
if (xerror)
{
char message[1000];
XGetErrorText (xlib_renderer->xdpy, xerror,
message, sizeof (message));
g_set_error (error, COGL_WINSYS_ERROR,
COGL_WINSYS_ERROR_CREATE_ONSCREEN,
"X error while creating Window for CoglOnscreen: %s",
message);
return FALSE;
}
}
xlib_onscreen = g_slice_new (CoglOnscreenXlib);
egl_onscreen->platform = xlib_onscreen;
xlib_onscreen->xwin = xwin;
xlib_onscreen->is_foreign_xwin = onscreen->foreign_xid ? TRUE : FALSE;
egl_onscreen->egl_surface =
eglCreateWindowSurface (egl_renderer->edpy,
egl_config,
(NativeWindowType) xlib_onscreen->xwin,
NULL);
return TRUE;
}
static void
_cogl_winsys_egl_onscreen_deinit (CoglOnscreen *onscreen)
{
CoglFramebuffer *framebuffer = COGL_FRAMEBUFFER (onscreen);
CoglContext *context = framebuffer->context;
CoglRenderer *renderer = context->display->renderer;
CoglXlibRenderer *xlib_renderer =
_cogl_xlib_renderer_get_data (renderer);
CoglXlibTrapState old_state;
CoglOnscreenEGL *egl_onscreen = onscreen->winsys;
CoglOnscreenXlib *xlib_onscreen = egl_onscreen->platform;
_cogl_xlib_renderer_trap_errors (renderer, &old_state);
if (!xlib_onscreen->is_foreign_xwin && xlib_onscreen->xwin != None)
{
XDestroyWindow (xlib_renderer->xdpy, xlib_onscreen->xwin);
xlib_onscreen->xwin = None;
}
else
xlib_onscreen->xwin = None;
XSync (xlib_renderer->xdpy, False);
if (_cogl_xlib_renderer_untrap_errors (renderer,
&old_state) != Success)
g_warning ("X Error while destroying X window");
g_slice_free (CoglOnscreenXlib, xlib_onscreen);
}
static void
_cogl_winsys_onscreen_set_visibility (CoglOnscreen *onscreen,
gboolean visibility)
{
CoglContext *context = COGL_FRAMEBUFFER (onscreen)->context;
CoglRenderer *renderer = context->display->renderer;
CoglXlibRenderer *xlib_renderer =
_cogl_xlib_renderer_get_data (renderer);
CoglOnscreenEGL *onscreen_egl = onscreen->winsys;
CoglOnscreenXlib *xlib_onscreen = onscreen_egl->platform;
if (visibility)
XMapWindow (xlib_renderer->xdpy, xlib_onscreen->xwin);
else
XUnmapWindow (xlib_renderer->xdpy, xlib_onscreen->xwin);
}
static guint32
_cogl_winsys_onscreen_x11_get_window_xid (CoglOnscreen *onscreen)
{
CoglOnscreenEGL *egl_onscreen = onscreen->winsys;
CoglOnscreenXlib *xlib_onscreen = egl_onscreen->platform;
return xlib_onscreen->xwin;
}
static gboolean
_cogl_winsys_egl_context_created (CoglDisplay *display,
GError **error)
{
CoglRenderer *renderer = display->renderer;
CoglDisplayEGL *egl_display = display->winsys;
CoglRendererEGL *egl_renderer = renderer->winsys;
CoglXlibRenderer *xlib_renderer =
_cogl_xlib_renderer_get_data (renderer);
CoglDisplayXlib *xlib_display = egl_display->platform;
XVisualInfo *xvisinfo;
XSetWindowAttributes attrs;
const char *error_message;
xvisinfo = get_visual_info (display, egl_display->egl_config);
if (xvisinfo == NULL)
{
error_message = "Unable to find suitable X visual";
goto fail;
}
attrs.override_redirect = True;
attrs.colormap = XCreateColormap (xlib_renderer->xdpy,
DefaultRootWindow (xlib_renderer->xdpy),
xvisinfo->visual,
AllocNone);
attrs.border_pixel = 0;
xlib_display->dummy_xwin =
XCreateWindow (xlib_renderer->xdpy,
DefaultRootWindow (xlib_renderer->xdpy),
-100, -100, 1, 1,
0,
xvisinfo->depth,
CopyFromParent,
xvisinfo->visual,
CWOverrideRedirect |
CWColormap |
CWBorderPixel,
&attrs);
XFree (xvisinfo);
egl_display->dummy_surface =
eglCreateWindowSurface (egl_renderer->edpy,
egl_display->egl_config,
(NativeWindowType) xlib_display->dummy_xwin,
NULL);
if (egl_display->dummy_surface == EGL_NO_SURFACE)
{
error_message = "Unable to create an EGL surface";
goto fail;
}
if (!eglMakeCurrent (egl_renderer->edpy,
egl_display->dummy_surface,
egl_display->dummy_surface,
egl_display->egl_context))
{
error_message = "Unable to eglMakeCurrent with dummy surface";
goto fail;
}
return TRUE;
fail:
g_set_error (error, COGL_WINSYS_ERROR,
COGL_WINSYS_ERROR_CREATE_CONTEXT,
"%s", error_message);
return FALSE;
}
static void
_cogl_winsys_egl_cleanup_context (CoglDisplay *display)
{
CoglDisplayEGL *egl_display = display->winsys;
CoglDisplayXlib *xlib_display = egl_display->platform;
CoglRenderer *renderer = display->renderer;
CoglXlibRenderer *xlib_renderer =
_cogl_xlib_renderer_get_data (renderer);
CoglRendererEGL *egl_renderer = renderer->winsys;
if (egl_display->dummy_surface != EGL_NO_SURFACE)
{
eglDestroySurface (egl_renderer->edpy, egl_display->dummy_surface);
egl_display->dummy_surface = EGL_NO_SURFACE;
}
if (xlib_display->dummy_xwin)
{
XDestroyWindow (xlib_renderer->xdpy, xlib_display->dummy_xwin);
xlib_display->dummy_xwin = None;
}
}
/* XXX: This is a particularly hacky _cogl_winsys interface... */
static XVisualInfo *
_cogl_winsys_xlib_get_visual_info (void)
{
CoglDisplayEGL *egl_display;
_COGL_GET_CONTEXT (ctx, NULL);
_COGL_RETURN_VAL_IF_FAIL (ctx->display->winsys, FALSE);
egl_display = ctx->display->winsys;
if (!egl_display->found_egl_config)
return NULL;
return get_visual_info (ctx->display, egl_display->egl_config);
}
static void
_cogl_winsys_poll_get_info (CoglContext *context,
CoglPollFD **poll_fds,
int *n_poll_fds,
gint64 *timeout)
{
_cogl_xlib_renderer_poll_get_info (context->display->renderer,
poll_fds,
n_poll_fds,
timeout);
}
static void
_cogl_winsys_poll_dispatch (CoglContext *context,
const CoglPollFD *poll_fds,
int n_poll_fds)
{
_cogl_xlib_renderer_poll_dispatch (context->display->renderer,
poll_fds,
n_poll_fds);
}
#ifdef EGL_KHR_image_pixmap
static gboolean
_cogl_winsys_texture_pixmap_x11_create (CoglTexturePixmapX11 *tex_pixmap)
{
CoglTexturePixmapEGL *egl_tex_pixmap;
EGLint attribs[] = {EGL_IMAGE_PRESERVED_KHR, EGL_TRUE, EGL_NONE};
CoglPixelFormat texture_format;
CoglRendererEGL *egl_renderer;
/* FIXME: It should be possible to get to a CoglContext from any
* CoglTexture pointer. */
_COGL_GET_CONTEXT (ctx, FALSE);
egl_renderer = ctx->display->renderer->winsys;
if (!(egl_renderer->private_features &
COGL_EGL_WINSYS_FEATURE_EGL_IMAGE_FROM_X11_PIXMAP) ||
!(ctx->private_feature_flags &
COGL_PRIVATE_FEATURE_TEXTURE_2D_FROM_EGL_IMAGE))
{
tex_pixmap->winsys = NULL;
return FALSE;
}
egl_tex_pixmap = g_new0 (CoglTexturePixmapEGL, 1);
egl_tex_pixmap->image =
_cogl_egl_create_image (ctx,
EGL_NATIVE_PIXMAP_KHR,
(EGLClientBuffer)tex_pixmap->pixmap,
attribs);
if (egl_tex_pixmap->image == EGL_NO_IMAGE_KHR)
{
g_free (egl_tex_pixmap);
return FALSE;
}
texture_format = (tex_pixmap->depth >= 32 ?
COGL_PIXEL_FORMAT_RGBA_8888_PRE :
COGL_PIXEL_FORMAT_RGB_888);
egl_tex_pixmap->texture = COGL_TEXTURE (
_cogl_egl_texture_2d_new_from_image (ctx,
tex_pixmap->width,
tex_pixmap->height,
texture_format,
egl_tex_pixmap->image,
NULL));
tex_pixmap->winsys = egl_tex_pixmap;
return TRUE;
}
static void
_cogl_winsys_texture_pixmap_x11_free (CoglTexturePixmapX11 *tex_pixmap)
{
CoglTexturePixmapEGL *egl_tex_pixmap;
/* FIXME: It should be possible to get to a CoglContext from any
* CoglTexture pointer. */
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (!tex_pixmap->winsys)
return;
egl_tex_pixmap = tex_pixmap->winsys;
if (egl_tex_pixmap->texture)
cogl_object_unref (egl_tex_pixmap->texture);
if (egl_tex_pixmap->image != EGL_NO_IMAGE_KHR)
_cogl_egl_destroy_image (ctx, egl_tex_pixmap->image);
tex_pixmap->winsys = NULL;
g_free (egl_tex_pixmap);
}
static gboolean
_cogl_winsys_texture_pixmap_x11_update (CoglTexturePixmapX11 *tex_pixmap,
gboolean needs_mipmap)
{
if (needs_mipmap)
return FALSE;
return TRUE;
}
static void
_cogl_winsys_texture_pixmap_x11_damage_notify (CoglTexturePixmapX11 *tex_pixmap)
{
}
static CoglHandle
_cogl_winsys_texture_pixmap_x11_get_texture (CoglTexturePixmapX11 *tex_pixmap)
{
CoglTexturePixmapEGL *egl_tex_pixmap = tex_pixmap->winsys;
return egl_tex_pixmap->texture;
}
#endif /* EGL_KHR_image_pixmap */
static const CoglWinsysEGLVtable
_cogl_winsys_egl_vtable =
{
.display_setup = _cogl_winsys_egl_display_setup,
.display_destroy = _cogl_winsys_egl_display_destroy,
.context_created = _cogl_winsys_egl_context_created,
.cleanup_context = _cogl_winsys_egl_cleanup_context,
.context_init = _cogl_winsys_egl_context_init,
.context_deinit = _cogl_winsys_egl_context_deinit,
.onscreen_init = _cogl_winsys_egl_onscreen_init,
.onscreen_deinit = _cogl_winsys_egl_onscreen_deinit
};
const CoglWinsysVtable *
_cogl_winsys_egl_xlib_get_vtable (void)
{
static gboolean vtable_inited = FALSE;
static CoglWinsysVtable vtable;
if (!vtable_inited)
{
/* The EGL_X11 winsys is a subclass of the EGL winsys so we
start by copying its vtable */
vtable = *_cogl_winsys_egl_get_vtable ();
vtable.id = COGL_WINSYS_ID_EGL_XLIB;
vtable.name = "EGL_XLIB";
vtable.criteria |= (COGL_WINSYS_CRITERIA_USES_X11 |
COGL_WINSYS_CRITERIA_USES_XLIB);
vtable.renderer_connect = _cogl_winsys_renderer_connect;
vtable.renderer_disconnect = _cogl_winsys_renderer_disconnect;
vtable.onscreen_set_visibility =
_cogl_winsys_onscreen_set_visibility;
vtable.onscreen_x11_get_window_xid =
_cogl_winsys_onscreen_x11_get_window_xid;
vtable.xlib_get_visual_info = _cogl_winsys_xlib_get_visual_info;
vtable.poll_get_info = _cogl_winsys_poll_get_info;
vtable.poll_dispatch = _cogl_winsys_poll_dispatch;
#ifdef EGL_KHR_image_pixmap
/* X11 tfp support... */
/* XXX: instead of having a rather monolithic winsys vtable we could
* perhaps look for a way to separate these... */
vtable.texture_pixmap_x11_create =
_cogl_winsys_texture_pixmap_x11_create;
vtable.texture_pixmap_x11_free =
_cogl_winsys_texture_pixmap_x11_free;
vtable.texture_pixmap_x11_update =
_cogl_winsys_texture_pixmap_x11_update;
vtable.texture_pixmap_x11_damage_notify =
_cogl_winsys_texture_pixmap_x11_damage_notify;
vtable.texture_pixmap_x11_get_texture =
_cogl_winsys_texture_pixmap_x11_get_texture;
#endif /* EGL_KHR_image_pixmap) */
vtable_inited = TRUE;
}
return &vtable;
}
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