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mutter/clutter/glx/clutter-backend-glx.c
Emmanuele Bassi 0194e9db2f glx: Use g_set_error_literal() where appropriate
2011-03-04 23:58:12 +00:00

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/* Clutter.
* An OpenGL based 'interactive canvas' library.
* Authored By Matthew Allum <mallum@openedhand.com>
* Copyright (C) 2006-2007 OpenedHand
*
* 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/>.
*
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <sys/types.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <fcntl.h>
#include <glib/gi18n-lib.h>
#include <GL/glx.h>
#include <GL/glxext.h>
#include <GL/gl.h>
#include "clutter-backend-glx.h"
#include "clutter-stage-glx.h"
#include "clutter-glx.h"
#include "clutter-profile.h"
#include "clutter-debug.h"
#include "clutter-event-translator.h"
#include "clutter-event.h"
#include "clutter-main.h"
#include "clutter-private.h"
#include "clutter-stage-private.h"
#include "cogl/cogl.h"
#define clutter_backend_glx_get_type _clutter_backend_glx_get_type
G_DEFINE_TYPE (ClutterBackendGLX, clutter_backend_glx, CLUTTER_TYPE_BACKEND_X11);
/* singleton object */
static ClutterBackendGLX *backend_singleton = NULL;
static gchar *clutter_vblank_name = NULL;
G_CONST_RETURN gchar*
_clutter_backend_glx_get_vblank_method (void)
{
return clutter_vblank_name;
}
static gboolean
clutter_backend_glx_pre_parse (ClutterBackend *backend,
GError **error)
{
ClutterBackendClass *parent_class =
CLUTTER_BACKEND_CLASS (clutter_backend_glx_parent_class);
const gchar *env_string;
env_string = g_getenv ("CLUTTER_VBLANK");
if (env_string)
{
clutter_vblank_name = g_strdup (env_string);
env_string = NULL;
}
return parent_class->pre_parse (backend, error);
}
static gboolean
clutter_backend_glx_post_parse (ClutterBackend *backend,
GError **error)
{
ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend);
ClutterBackendGLX *backend_glx = CLUTTER_BACKEND_GLX (backend);
ClutterBackendClass *parent_class =
CLUTTER_BACKEND_CLASS (clutter_backend_glx_parent_class);
int glx_major, glx_minor;
if (!parent_class->post_parse (backend, error))
return FALSE;
if (!glXQueryExtension (backend_x11->xdpy,
&backend_glx->error_base,
&backend_glx->event_base))
{
g_set_error_literal (error, CLUTTER_INIT_ERROR,
CLUTTER_INIT_ERROR_BACKEND,
"XServer appears to lack the required GLX support");
return FALSE;
}
/* XXX: Technically we should require >= GLX 1.3 support but for a long
* time Mesa has exported a hybrid GLX, exporting extensions specified
* to require GLX 1.3, but still reporting 1.2 via glXQueryVersion. */
glx_major = 1;
glx_minor = 2;
if (!glXQueryVersion (backend_x11->xdpy, &glx_major, &glx_minor) ||
!(glx_major == 1 && glx_minor >= 2))
{
g_set_error (error, CLUTTER_INIT_ERROR,
CLUTTER_INIT_ERROR_BACKEND,
"XServer appears to lack the required GLX "
"1.2 support (%d.%d reported)",
glx_major, glx_minor);
return FALSE;
}
return TRUE;
}
static const GOptionEntry entries[] =
{
{ "vblank", 0,
0,
G_OPTION_ARG_STRING, &clutter_vblank_name,
N_("VBlank method to be used (none, dri or glx)"), "METHOD"
},
{ NULL }
};
static void
clutter_backend_glx_add_options (ClutterBackend *backend,
GOptionGroup *group)
{
ClutterBackendClass *parent_class =
CLUTTER_BACKEND_CLASS (clutter_backend_glx_parent_class);
g_option_group_add_entries (group, entries);
parent_class->add_options (backend, group);
}
static void
clutter_backend_glx_finalize (GObject *gobject)
{
if (backend_singleton)
backend_singleton = NULL;
G_OBJECT_CLASS (clutter_backend_glx_parent_class)->finalize (gobject);
}
static void
clutter_backend_glx_dispose (GObject *gobject)
{
ClutterBackendGLX *backend_glx = CLUTTER_BACKEND_GLX (gobject);
ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (gobject);
/* Unrealize all shaders, since the GL context is going away */
_clutter_shader_release_all ();
if (backend_glx->gl_context)
{
glXMakeContextCurrent (backend_x11->xdpy, None, None, NULL);
glXDestroyContext (backend_x11->xdpy, backend_glx->gl_context);
backend_glx->gl_context = NULL;
}
if (backend_glx->dummy_glxwin)
{
glXDestroyWindow (backend_x11->xdpy, backend_glx->dummy_glxwin);
backend_glx->dummy_glxwin = None;
}
if (backend_glx->dummy_xwin)
{
XDestroyWindow (backend_x11->xdpy, backend_glx->dummy_xwin);
backend_glx->dummy_xwin = None;
}
G_OBJECT_CLASS (clutter_backend_glx_parent_class)->dispose (gobject);
}
static GObject *
clutter_backend_glx_constructor (GType gtype,
guint n_params,
GObjectConstructParam *params)
{
GObjectClass *parent_class;
GObject *retval;
if (!backend_singleton)
{
parent_class = G_OBJECT_CLASS (clutter_backend_glx_parent_class);
retval = parent_class->constructor (gtype, n_params, params);
backend_singleton = CLUTTER_BACKEND_GLX (retval);
return retval;
}
g_warning ("Attempting to create a new backend object. This should "
"never happen, so we return the singleton instance.");
return g_object_ref (backend_singleton);
}
static gboolean
check_vblank_env (const char *name)
{
if (clutter_vblank_name && !g_ascii_strcasecmp (clutter_vblank_name, name))
return TRUE;
return FALSE;
}
static ClutterFeatureFlags
clutter_backend_glx_get_features (ClutterBackend *backend)
{
ClutterBackendGLX *backend_glx = CLUTTER_BACKEND_GLX (backend);
ClutterBackendClass *parent_class;
const gchar *glx_extensions = NULL;
const gchar *gl_extensions = NULL;
ClutterFeatureFlags flags;
gboolean use_dri = FALSE;
parent_class = CLUTTER_BACKEND_CLASS (clutter_backend_glx_parent_class);
flags = parent_class->get_features (backend);
flags |= CLUTTER_FEATURE_STAGE_MULTIPLE;
/* this will make sure that the GL context exists */
g_assert (backend_glx->gl_context != NULL);
g_assert (glXGetCurrentDrawable () != None);
CLUTTER_NOTE (BACKEND,
"Checking features\n"
" GL_VENDOR: %s\n"
" GL_RENDERER: %s\n"
" GL_VERSION: %s\n"
" GL_EXTENSIONS: %s",
glGetString (GL_VENDOR),
glGetString (GL_RENDERER),
glGetString (GL_VERSION),
glGetString (GL_EXTENSIONS));
glx_extensions =
glXQueryExtensionsString (clutter_x11_get_default_display (),
clutter_x11_get_default_screen ());
CLUTTER_NOTE (BACKEND, " GLX Extensions: %s", glx_extensions);
gl_extensions = (const gchar *)glGetString (GL_EXTENSIONS);
/* When using glBlitFramebuffer or glXCopySubBufferMESA for sub stage
* redraws, we cannot rely on glXSwapIntervalSGI to throttle the blits
* so we need to resort to manually synchronizing with the vblank so we
* always check for the video_sync extension...
*/
if (_cogl_check_extension ("GLX_SGI_video_sync", glx_extensions) &&
/* Note: the GLX_SGI_video_sync spec explicitly states this extension
* only works for direct contexts. */
glXIsDirect (clutter_x11_get_default_display (),
backend_glx->gl_context))
{
backend_glx->get_video_sync =
(GetVideoSyncProc) cogl_get_proc_address ("glXGetVideoSyncSGI");
backend_glx->wait_video_sync =
(WaitVideoSyncProc) cogl_get_proc_address ("glXWaitVideoSyncSGI");
}
use_dri = check_vblank_env ("dri");
/* First check for explicit disabling or it set elsewhere (eg NVIDIA) */
if (check_vblank_env ("none"))
{
CLUTTER_NOTE (BACKEND, "vblank sync: disabled at user request");
goto vblank_setup_done;
}
if (g_getenv ("__GL_SYNC_TO_VBLANK") != NULL)
{
backend_glx->vblank_type = CLUTTER_VBLANK_GLX_SWAP;
flags |= CLUTTER_FEATURE_SYNC_TO_VBLANK;
CLUTTER_NOTE (BACKEND, "Using __GL_SYNC_TO_VBLANK hint");
goto vblank_setup_done;
}
/* We try two GL vblank syncing mechanisms.
* glXSwapIntervalSGI is tried first, then glXGetVideoSyncSGI.
*
* glXSwapIntervalSGI is known to work with Mesa and in particular
* the Intel drivers. glXGetVideoSyncSGI has serious problems with
* Intel drivers causing terrible frame rate so it only tried as a
* fallback.
*
* How well glXGetVideoSyncSGI works with other driver (ATI etc) needs
* to be investigated. glXGetVideoSyncSGI on ATI at least seems to have
* no effect.
*/
if (!use_dri &&
_cogl_check_extension ("GLX_SGI_swap_control", glx_extensions))
{
backend_glx->swap_interval =
(SwapIntervalProc) cogl_get_proc_address ("glXSwapIntervalSGI");
CLUTTER_NOTE (BACKEND, "attempting glXSwapIntervalSGI vblank setup");
if (backend_glx->swap_interval != NULL &&
backend_glx->swap_interval (1) == 0)
{
backend_glx->vblank_type = CLUTTER_VBLANK_GLX_SWAP;
flags |= CLUTTER_FEATURE_SYNC_TO_VBLANK;
CLUTTER_NOTE (BACKEND, "glXSwapIntervalSGI setup success");
#ifdef GLX_INTEL_swap_event
/* GLX_INTEL_swap_event allows us to avoid blocking the CPU
* while we wait for glXSwapBuffers to complete, and instead
* we get an X event notifying us of completion...
*/
if (!(clutter_paint_debug_flags & CLUTTER_DEBUG_DISABLE_SWAP_EVENTS) &&
_cogl_check_extension ("GLX_INTEL_swap_event", glx_extensions))
{
flags |= CLUTTER_FEATURE_SWAP_EVENTS;
}
#endif /* GLX_INTEL_swap_event */
goto vblank_setup_done;
}
CLUTTER_NOTE (BACKEND, "glXSwapIntervalSGI vblank setup failed");
}
if (!use_dri &&
!(flags & CLUTTER_FEATURE_SYNC_TO_VBLANK) &&
_cogl_check_extension ("GLX_SGI_video_sync", glx_extensions))
{
CLUTTER_NOTE (BACKEND, "attempting glXGetVideoSyncSGI vblank setup");
if ((backend_glx->get_video_sync != NULL) &&
(backend_glx->wait_video_sync != NULL))
{
CLUTTER_NOTE (BACKEND, "glXGetVideoSyncSGI vblank setup success");
backend_glx->vblank_type = CLUTTER_VBLANK_GLX;
flags |= CLUTTER_FEATURE_SYNC_TO_VBLANK;
goto vblank_setup_done;
}
CLUTTER_NOTE (BACKEND, "glXGetVideoSyncSGI vblank setup failed");
}
#ifdef __linux__
/*
* DRI is really an extreme fallback -rumoured to work with Via chipsets
*/
if (!(flags & CLUTTER_FEATURE_SYNC_TO_VBLANK))
{
CLUTTER_NOTE (BACKEND, "attempting DRI vblank setup");
backend_glx->dri_fd = open("/dev/dri/card0", O_RDWR);
if (backend_glx->dri_fd >= 0)
{
CLUTTER_NOTE (BACKEND, "DRI vblank setup success");
backend_glx->vblank_type = CLUTTER_VBLANK_DRI;
flags |= CLUTTER_FEATURE_SYNC_TO_VBLANK;
goto vblank_setup_done;
}
CLUTTER_NOTE (BACKEND, "DRI vblank setup failed");
}
#endif /* __linux__ */
CLUTTER_NOTE (BACKEND, "no use-able vblank mechanism found");
vblank_setup_done:
if (_cogl_check_extension ("GLX_MESA_copy_sub_buffer", glx_extensions))
{
backend_glx->copy_sub_buffer =
(CopySubBufferProc) cogl_get_proc_address ("glXCopySubBufferMESA");
backend_glx->can_blit_sub_buffer = TRUE;
backend_glx->blit_sub_buffer_is_synchronized = TRUE;
}
else if (_cogl_check_extension ("GL_EXT_framebuffer_blit", gl_extensions))
{
CLUTTER_NOTE (BACKEND,
"Using glBlitFramebuffer fallback for sub_buffer copies");
backend_glx->blit_framebuffer =
(BlitFramebufferProc) cogl_get_proc_address ("glBlitFramebuffer");
backend_glx->can_blit_sub_buffer = TRUE;
backend_glx->blit_sub_buffer_is_synchronized = FALSE;
}
CLUTTER_NOTE (BACKEND, "backend features checked");
return flags;
}
/* It seems the GLX spec never defined an invalid GLXFBConfig that
* we could overload as an indication of error, so we have to return
* an explicit boolean status. */
gboolean
_clutter_backend_glx_get_fbconfig (ClutterBackendGLX *backend_glx,
GLXFBConfig *config)
{
ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend_glx);
GLXFBConfig *configs = NULL;
gboolean use_argb = clutter_x11_get_use_argb_visual ();
int n_configs, i;
static const int attributes[] = {
GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT,
GLX_RENDER_TYPE, GLX_RGBA_BIT,
GLX_DOUBLEBUFFER, GL_TRUE,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_ALPHA_SIZE, 1,
GLX_DEPTH_SIZE, 1,
GLX_STENCIL_SIZE, 1,
None
};
if (backend_x11->xdpy == NULL || backend_x11->xscreen == NULL)
return FALSE;
/* If we don't already have a cached config then try to get one */
if (!backend_glx->found_fbconfig)
{
CLUTTER_NOTE (BACKEND,
"Retrieving GL fbconfig, dpy: %p, xscreen; %p (%d)",
backend_x11->xdpy,
backend_x11->xscreen,
backend_x11->xscreen_num);
configs = glXChooseFBConfig (backend_x11->xdpy,
backend_x11->xscreen_num,
attributes,
&n_configs);
if (configs)
{
if (use_argb)
{
for (i = 0; i < n_configs; i++)
{
XVisualInfo *vinfo;
vinfo = glXGetVisualFromFBConfig (backend_x11->xdpy,
configs[i]);
if (vinfo == NULL)
continue;
if (vinfo->depth == 32 &&
(vinfo->red_mask == 0xff0000 &&
vinfo->green_mask == 0x00ff00 &&
vinfo->blue_mask == 0x0000ff))
{
CLUTTER_NOTE (BACKEND,
"Found an ARGB FBConfig [index:%d]",
i);
backend_glx->found_fbconfig = TRUE;
backend_glx->fbconfig = configs[i];
goto out;
}
}
/* If we make it here then we didn't find an RGBA config so
we'll fall back to using an RGB config */
CLUTTER_NOTE (BACKEND, "ARGB visual requested, but none found");
}
if (n_configs >= 1)
{
CLUTTER_NOTE (BACKEND, "Using the first available FBConfig");
backend_glx->found_fbconfig = TRUE;
backend_glx->fbconfig = configs[0];
}
out:
XFree (configs);
}
}
if (G_LIKELY (backend_glx->found_fbconfig))
{
*config = backend_glx->fbconfig;
return TRUE;
}
return FALSE;
}
void
_clutter_backend_glx_blit_sub_buffer (ClutterBackendGLX *backend_glx,
GLXDrawable drawable,
int x,
int y,
int width,
int height)
{
ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend_glx);
if (backend_glx->copy_sub_buffer)
{
backend_glx->copy_sub_buffer (backend_x11->xdpy, drawable,
x, y, width, height);
}
else if (backend_glx->blit_framebuffer)
{
glDrawBuffer (GL_FRONT);
backend_glx->blit_framebuffer (x, y, x + width, y + height,
x, y, x + width, y + height,
GL_COLOR_BUFFER_BIT, GL_NEAREST);
glDrawBuffer (GL_BACK);
}
/* NB: unlike glXSwapBuffers, glXCopySubBuffer and
* glBlitFramebuffer don't issue an implicit glFlush() so we
* have to flush ourselves if we want the request to complete in
* finite amount of time since otherwise the driver can batch
* the command indefinitely. */
glFlush();
}
static XVisualInfo *
clutter_backend_glx_get_visual_info (ClutterBackendX11 *backend_x11)
{
ClutterBackendGLX *backend_glx = CLUTTER_BACKEND_GLX (backend_x11);
GLXFBConfig config;
if (!_clutter_backend_glx_get_fbconfig (backend_glx, &config))
return NULL;
return glXGetVisualFromFBConfig (backend_x11->xdpy, config);
}
static gboolean
clutter_backend_glx_create_context (ClutterBackend *backend,
GError **error)
{
ClutterBackendGLX *backend_glx = CLUTTER_BACKEND_GLX (backend);
ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend);
GLXFBConfig config;
gboolean is_direct;
Window root_xwin;
XSetWindowAttributes attrs;
XVisualInfo *xvisinfo;
Display *xdisplay;
int major;
int minor;
GLXDrawable dummy_drawable;
if (backend_glx->gl_context != NULL)
return TRUE;
xdisplay = clutter_x11_get_default_display ();
root_xwin = clutter_x11_get_root_window ();
if (!_clutter_backend_glx_get_fbconfig (backend_glx, &config))
{
g_set_error_literal (error, CLUTTER_INIT_ERROR,
CLUTTER_INIT_ERROR_BACKEND,
"Unable to find suitable fbconfig for the GLX context");
return FALSE;
}
CLUTTER_NOTE (BACKEND, "Creating GLX Context (display: %p)", xdisplay);
backend_glx->gl_context = glXCreateNewContext (xdisplay,
config,
GLX_RGBA_TYPE,
NULL,
True);
if (backend_glx->gl_context == NULL)
{
g_set_error_literal (error, CLUTTER_INIT_ERROR,
CLUTTER_INIT_ERROR_BACKEND,
"Unable to create suitable GL context");
return FALSE;
}
is_direct = glXIsDirect (xdisplay, backend_glx->gl_context);
CLUTTER_NOTE (GL, "Setting %s context",
is_direct ? "direct"
: "indirect");
_cogl_set_indirect_context (!is_direct);
/* COGL assumes that there is always a GL context selected; in order
* to make sure that a GLX context exists and is made current, we use
* a dummy, offscreen override-redirect window to which we can always
* fall back if no stage is available
*
* XXX - we need to do this dance because GLX does not allow creating
* a context and querying it for basic information (even the function
* pointers) unless it's made current to a real Drawable. it should be
* possible to avoid this in future releases of Mesa and X11, but right
* now this is the best solution available.
*/
xvisinfo = glXGetVisualFromFBConfig (xdisplay, config);
if (xvisinfo == NULL)
{
g_set_error_literal (error, CLUTTER_INIT_ERROR,
CLUTTER_INIT_ERROR_BACKEND,
"Unable to retrieve the X11 visual");
return FALSE;
}
clutter_x11_trap_x_errors ();
attrs.override_redirect = True;
attrs.colormap = XCreateColormap (xdisplay,
root_xwin,
xvisinfo->visual,
AllocNone);
attrs.border_pixel = 0;
backend_glx->dummy_xwin = XCreateWindow (xdisplay, root_xwin,
-100, -100, 1, 1,
0,
xvisinfo->depth,
CopyFromParent,
xvisinfo->visual,
CWOverrideRedirect | CWColormap | CWBorderPixel,
&attrs);
/* Try and create a GLXWindow to use with extensions dependent on
* GLX versions >= 1.3 that don't accept regular X Windows as GLX
* drawables. */
if (glXQueryVersion (backend_x11->xdpy, &major, &minor) &&
major == 1 && minor >= 3)
{
backend_glx->dummy_glxwin = glXCreateWindow (backend_x11->xdpy,
config,
backend_glx->dummy_xwin,
NULL);
}
if (backend_glx->dummy_glxwin)
dummy_drawable = backend_glx->dummy_glxwin;
else
dummy_drawable = backend_glx->dummy_xwin;
CLUTTER_NOTE (BACKEND, "Selecting dummy 0x%x for the GLX context",
(unsigned int) dummy_drawable);
glXMakeContextCurrent (xdisplay,
dummy_drawable,
dummy_drawable,
backend_glx->gl_context);
XFree (xvisinfo);
if (clutter_x11_untrap_x_errors ())
{
g_set_error_literal (error, CLUTTER_INIT_ERROR,
CLUTTER_INIT_ERROR_BACKEND,
"Unable to select the newly created GLX context");
return FALSE;
}
return TRUE;
}
/* TODO: remove this interface in favour of
* _clutter_stage_window_make_current () */
static void
clutter_backend_glx_ensure_context (ClutterBackend *backend,
ClutterStage *stage)
{
ClutterStageWindow *impl;
/* if there is no stage, the stage is being destroyed or it has no
* implementation attached to it then we clear the GL context
*/
if (stage == NULL ||
CLUTTER_ACTOR_IN_DESTRUCTION (stage) ||
((impl = _clutter_stage_get_window (stage)) == NULL))
{
ClutterBackendX11 *backend_x11;
backend_x11 = CLUTTER_BACKEND_X11 (backend);
CLUTTER_NOTE (MULTISTAGE, "Clearing all context");
glXMakeContextCurrent (backend_x11->xdpy, None, None, NULL);
}
else
{
ClutterBackendGLX *backend_glx;
ClutterBackendX11 *backend_x11;
ClutterStageGLX *stage_glx;
ClutterStageX11 *stage_x11;
GLXDrawable drawable;
g_assert (impl != NULL);
stage_glx = CLUTTER_STAGE_GLX (impl);
stage_x11 = CLUTTER_STAGE_X11 (impl);
backend_glx = CLUTTER_BACKEND_GLX (backend);
backend_x11 = CLUTTER_BACKEND_X11 (backend);
drawable = stage_glx->glxwin ? stage_glx->glxwin : stage_x11->xwin;
CLUTTER_NOTE (BACKEND,
"Setting context for stage of type %s, window: 0x%x",
G_OBJECT_TYPE_NAME (impl),
(unsigned int) drawable);
/* no GL context to set */
if (backend_glx->gl_context == NULL)
return;
clutter_x11_trap_x_errors ();
/* we might get here inside the final dispose cycle, so we
* need to handle this gracefully
*/
if (drawable == None)
{
GLXDrawable dummy_drawable;
CLUTTER_NOTE (BACKEND,
"Received a stale stage, clearing all context");
if (backend_glx->dummy_glxwin)
dummy_drawable = backend_glx->dummy_glxwin;
else
dummy_drawable = backend_glx->dummy_xwin;
if (dummy_drawable == None)
glXMakeContextCurrent (backend_x11->xdpy, None, None, NULL);
else
{
glXMakeContextCurrent (backend_x11->xdpy,
dummy_drawable,
dummy_drawable,
backend_glx->gl_context);
}
}
else
{
CLUTTER_NOTE (BACKEND,
"MakeContextCurrent dpy: %p, window: 0x%x (%s), context: %p",
backend_x11->xdpy,
(unsigned int) drawable,
stage_x11->is_foreign_xwin ? "foreign" : "native",
backend_glx->gl_context);
glXMakeContextCurrent (backend_x11->xdpy,
drawable,
drawable,
backend_glx->gl_context);
/*
* In case we are using GLX_SGI_swap_control for vblank syncing we need call
* glXSwapIntervalSGI here to make sure that it affects the current drawable.
*/
if (backend_glx->vblank_type == CLUTTER_VBLANK_GLX_SWAP && backend_glx->swap_interval != NULL)
backend_glx->swap_interval (1);
}
if (clutter_x11_untrap_x_errors ())
g_critical ("Unable to make the stage window 0x%x the current "
"GLX drawable",
(unsigned int) drawable);
}
}
static ClutterStageWindow *
clutter_backend_glx_create_stage (ClutterBackend *backend,
ClutterStage *wrapper,
GError **error)
{
ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend);
ClutterEventTranslator *translator;
ClutterStageWindow *stage_window;
ClutterStageX11 *stage_x11;
stage_window = g_object_new (CLUTTER_TYPE_STAGE_GLX, NULL);
/* copy backend data into the stage */
stage_x11 = CLUTTER_STAGE_X11 (stage_window);
stage_x11->wrapper = wrapper;
stage_x11->backend = backend_x11;
translator = CLUTTER_EVENT_TRANSLATOR (stage_x11);
_clutter_backend_add_event_translator (backend, translator);
CLUTTER_NOTE (BACKEND,
"GLX stage created[%p] (dpy:%p, screen:%d, root:%u, wrap:%p)",
stage_window,
backend_x11->xdpy,
backend_x11->xscreen_num,
(unsigned int) backend_x11->xwin_root,
wrapper);
return stage_window;
}
static void
clutter_backend_glx_class_init (ClutterBackendGLXClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterBackendClass *backend_class = CLUTTER_BACKEND_CLASS (klass);
ClutterBackendX11Class *backendx11_class = CLUTTER_BACKEND_X11_CLASS (klass);
gobject_class->constructor = clutter_backend_glx_constructor;
gobject_class->dispose = clutter_backend_glx_dispose;
gobject_class->finalize = clutter_backend_glx_finalize;
backend_class->pre_parse = clutter_backend_glx_pre_parse;
backend_class->post_parse = clutter_backend_glx_post_parse;
backend_class->create_stage = clutter_backend_glx_create_stage;
backend_class->add_options = clutter_backend_glx_add_options;
backend_class->get_features = clutter_backend_glx_get_features;
backend_class->create_context = clutter_backend_glx_create_context;
backend_class->ensure_context = clutter_backend_glx_ensure_context;
backendx11_class->get_visual_info = clutter_backend_glx_get_visual_info;
}
static void
clutter_backend_glx_init (ClutterBackendGLX *backend_glx)
{
}
/* every backend must implement this function */
GType
_clutter_backend_impl_get_type (void)
{
return _clutter_backend_glx_get_type ();
}
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