static void
clutter_glx_texture_pixmap_init (ClutterGLXTexturePixmap *self)
{
ClutterGLXTexturePixmapPrivate *priv;
priv = self->priv =
G_TYPE_INSTANCE_GET_PRIVATE (self,
CLUTTER_GLX_TYPE_TEXTURE_PIXMAP,
ClutterGLXTexturePixmapPrivate);
if (_ext_check_done == FALSE)
{
const gchar *glx_extensions = NULL;
glx_extensions =
glXQueryExtensionsString (clutter_x11_get_default_display (),
clutter_x11_get_default_screen ());
/* Check for the texture from pixmap extension */
if (cogl_check_extension ("GLX_EXT_texture_from_pixmap", glx_extensions))
{
_gl_bind_tex_image =
(BindTexImage)cogl_get_proc_address ("glXBindTexImageEXT");
_gl_release_tex_image =
(ReleaseTexImage)cogl_get_proc_address ("glXReleaseTexImageEXT");
if (_gl_bind_tex_image && _gl_release_tex_image)
_have_tex_from_pixmap_ext = TRUE;
}
_ext_check_done = TRUE;
}
}
static ClutterFeatureFlags
clutter_backend_glx_get_features (ClutterBackend *backend)
{
ClutterBackendGLX *backend_glx = CLUTTER_BACKEND_GLX (backend);
const gchar *glx_extensions = NULL;
const gchar *gl_extensions = NULL;
ClutterFeatureFlags flags;
gboolean use_dri = FALSE;
flags = clutter_backend_x11_get_features (backend);
flags |= CLUTTER_FEATURE_STAGE_MULTIPLE;
/* this will make sure that the GL context exists */
g_assert (backend_glx->gl_context != None);
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;
}
static GLXFBConfig *
get_fbconfig_for_depth (guint depth)
{
GLXFBConfig *fbconfigs, *ret = NULL;
int n_elements, i, found;
Display *dpy;
int db, stencil, alpha, mipmap, rgba, value;
dpy = clutter_x11_get_default_display ();
fbconfigs = glXGetFBConfigs (dpy,
clutter_x11_get_default_screen (),
&n_elements);
db = G_MAXSHORT;
stencil = G_MAXSHORT;
mipmap = 0;
rgba = 0;
found = n_elements;
for (i = 0; i < n_elements; i++)
{
XVisualInfo *vi;
int visual_depth;
vi = glXGetVisualFromFBConfig (dpy,
fbconfigs[i]);
if (vi == NULL)
continue;
visual_depth = vi->depth;
XFree (vi);
if (visual_depth != depth)
continue;
glXGetFBConfigAttrib (dpy,
fbconfigs[i],
GLX_ALPHA_SIZE,
&alpha);
glXGetFBConfigAttrib (dpy,
fbconfigs[i],
GLX_BUFFER_SIZE,
&value);
if (value != depth && (value - alpha) != depth)
continue;
value = 0;
if (depth == 32)
{
glXGetFBConfigAttrib (dpy,
fbconfigs[i],
GLX_BIND_TO_TEXTURE_RGBA_EXT,
&value);
if (value)
rgba = 1;
}
if (!value)
{
if (rgba)
continue;
glXGetFBConfigAttrib (dpy,
fbconfigs[i],
GLX_BIND_TO_TEXTURE_RGB_EXT,
&value);
if (!value)
continue;
}
glXGetFBConfigAttrib (dpy,
fbconfigs[i],
GLX_DOUBLEBUFFER,
&value);
if (value > db)
continue;
db = value;
glXGetFBConfigAttrib (dpy,
fbconfigs[i],
GLX_STENCIL_SIZE,
&value);
if (value > stencil)
continue;
stencil = value;
found = i;
}
if (found != n_elements)
{
ret = g_malloc (sizeof (GLXFBConfig));
*ret = fbconfigs[found];
}
if (n_elements)
XFree (fbconfigs);
return ret;
}
static void
clutter_x11_texture_pixmap_update_area_real (ClutterX11TexturePixmap *texture,
gint x,
gint y,
gint width,
gint height)
{
ClutterX11TexturePixmapPrivate *priv;
Display *dpy;
XImage *image;
char *first_pixel;
GError *error = NULL;
guint bytes_per_line;
char *data;
int err_code;
char pixel_bpp;
gboolean pixel_has_alpha;
#if 0
clock_t start_t = clock();
#endif
if (!CLUTTER_ACTOR_IS_REALIZED (texture))
return;
priv = texture->priv;
dpy = clutter_x11_get_default_display();
if (!priv->pixmap)
return;
if (priv->shminfo.shmid == -1)
try_alloc_shm (texture);
clutter_x11_trap_x_errors ();
if (priv->have_shm)
{
image =
XShmCreateImage(dpy,
DefaultVisual(dpy,
clutter_x11_get_default_screen()),
priv->depth,
ZPixmap,
NULL,
&priv->shminfo,
width,
height);
image->data = priv->shminfo.shmaddr;
XShmGetImage (dpy, priv->pixmap, image, x, y, AllPlanes);
first_pixel = image->data;
}
else
{
if (!priv->image)
{
priv->image = XGetImage (dpy,
priv->pixmap,
0, 0,
priv->pixmap_width, priv->pixmap_height,
AllPlanes,
ZPixmap);
if (priv->image)
first_pixel = priv->image->data + priv->image->bytes_per_line * y
+ x * priv->image->bits_per_pixel/8;
else
{
g_warning ("%s: XGetImage() failed", __FUNCTION__);
return;
}
}
else
{
XGetSubImage (dpy,
priv->pixmap,
x, y,
width, height,
AllPlanes,
ZPixmap,
priv->image,
x, y);
first_pixel = priv->image->data + priv->image->bytes_per_line * y
+ x * priv->image->bits_per_pixel/8;
}
image = priv->image;
}
XSync (dpy, FALSE);
if ((err_code = clutter_x11_untrap_x_errors ()))
{
g_warning ("Failed to get XImage of pixmap: %lx, removing",
priv->pixmap);
/* safe to assume pixmap has gone away? - therefor reset */
clutter_x11_texture_pixmap_set_pixmap (texture, None);
goto free_image_and_return;
}
if (priv->depth == 24)
{
bytes_per_line = image->bytes_per_line;
data = first_pixel;
pixel_bpp = 3;
pixel_has_alpha = FALSE;
}
else if (priv->depth == 16)
{
bytes_per_line = image->bytes_per_line;
data = first_pixel;
pixel_bpp = 2;
pixel_has_alpha = FALSE;
}
else if (priv->depth == 32)
{
bytes_per_line = image->bytes_per_line;
data = first_pixel;
pixel_bpp = 4;
pixel_has_alpha = TRUE;
}
else
goto free_image_and_return;
if (!priv->allow_alpha)
pixel_has_alpha = FALSE;
/* For debugging purposes, un comment to simply generate dummy
* pixmap data. (A Green background and Blue cross) */
#if 0
{
guint xpos, ypos;
if (data_allocated)
g_free (data);
data_allocated = TRUE;
data = g_malloc (width*height*4);
bytes_per_line = width *4;
for (ypos=0; ypos<height; ypos++)
for (xpos=0; xpos<width; xpos++)
{
char *p = data + width*4*ypos + xpos * 4;
guint32 *pixel = (guint32 *)p;
if ((xpos > width/2 && xpos <= (width/2) + width/4)
|| (ypos > height/2 && ypos <= (height/2) + height/4))
*pixel=0xff0000ff;
else
*pixel=0xff00ff00;
}
}
#endif
if (x != 0 || y != 0 ||
width != priv->pixmap_width || height != priv->pixmap_height)
clutter_texture_set_area_from_rgb_data (CLUTTER_TEXTURE (texture),
(guint8 *)data,
pixel_has_alpha,
x, y,
width, height,
bytes_per_line,
pixel_bpp,
CLUTTER_TEXTURE_RGB_FLAG_BGR,
&error);
else
clutter_texture_set_from_rgb_data (CLUTTER_TEXTURE (texture),
(guint8 *)data,
pixel_has_alpha,
width, height,
bytes_per_line,
pixel_bpp,
CLUTTER_TEXTURE_RGB_FLAG_BGR,
&error);
if (error)
{
g_warning ("Error when uploading from pixbuf: %s",
error->message);
g_error_free (error);
}
free_image_and_return:
if (priv->have_shm)
XFree (image);
#if 0
clock_t end_t = clock();
int time = (int)((double)(end_t - start_t) * (1000.0 / CLOCKS_PER_SEC));
g_print("clutter-x11-update-area-real(%d,%d,%d,%d) %d bits - %d ms\n",x,y,width,height,priv->depth,time);
#endif
}
/* Tries to allocate enough shared mem to handle a full size
* update size of the X Pixmap. */
static gboolean
try_alloc_shm (ClutterX11TexturePixmap *texture)
{
ClutterX11TexturePixmapPrivate *priv;
XImage *dummy_image;
Display *dpy;
priv = texture->priv;
dpy = clutter_x11_get_default_display();
g_return_val_if_fail (priv->pixmap, FALSE);
if (!XShmQueryExtension(dpy) || g_getenv("CLUTTER_X11_NO_SHM"))
{
priv->have_shm = FALSE;
return FALSE;
}
clutter_x11_trap_x_errors ();
/* We are creating a dummy_image so we can have Xlib calculate
* image->bytes_per_line - including any magic padding it may
* want - for the largest possible ximage we might need to use
* when handling updates to the texture.
*
* Note: we pass a NULL shminfo here, but that has no bearing
* on the setup of the XImage, except that ximage->obdata will
* == NULL.
*/
dummy_image =
XShmCreateImage(dpy,
DefaultVisual(dpy,
clutter_x11_get_default_screen()),
priv->depth,
ZPixmap,
NULL,
NULL, /* shminfo, */
priv->pixmap_width,
priv->pixmap_height);
if (!dummy_image)
goto failed_image_create;
priv->shminfo.shmid = shmget (IPC_PRIVATE,
dummy_image->bytes_per_line
* dummy_image->height,
IPC_CREAT|0777);
if (priv->shminfo.shmid == -1)
goto failed_shmget;
priv->shminfo.shmaddr =
shmat (priv->shminfo.shmid, 0, 0);
if (priv->shminfo.shmaddr == (void *)-1)
goto failed_shmat;
priv->shminfo.readOnly = False;
if (XShmAttach(dpy, &priv->shminfo) == 0)
goto failed_xshmattach;
if (clutter_x11_untrap_x_errors ())
g_warning ("X Error: Failed to setup XShm");
priv->have_shm = TRUE;
if (dummy_image)
XFree (dummy_image);
return TRUE;
failed_xshmattach:
g_warning ("XShmAttach failed");
shmdt(priv->shminfo.shmaddr);
failed_shmat:
g_warning ("shmat failed");
shmctl(priv->shminfo.shmid, IPC_RMID, 0);
failed_shmget:
g_warning ("shmget failed");
XDestroyImage(dummy_image);
failed_image_create:
if (clutter_x11_untrap_x_errors ())
g_warning ("X Error: Failed to setup XShm");
priv->have_shm = FALSE;
return FALSE;
}
static ClutterFeatureFlags
clutter_backend_glx_get_features (ClutterBackend *backend)
{
ClutterBackendGLX *backend_glx = CLUTTER_BACKEND_GLX (backend);
const gchar *glx_extensions = NULL;
ClutterFeatureFlags flags;
flags = clutter_backend_x11_get_features (backend);
flags |= CLUTTER_FEATURE_STAGE_MULTIPLE;
/* this will make sure that the GL context exists and
* it's bound to a drawable
*/
g_assert (backend_glx->gl_context != None);
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\n",
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);
/* First check for explicit disabling or it set elsewhere (eg NVIDIA) */
if (getenv("__GL_SYNC_TO_VBLANK") || check_vblank_env ("none"))
{
CLUTTER_NOTE (BACKEND, "vblank sync: disabled at user request");
}
else
{
/* 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 (!check_vblank_env ("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)
{
if (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");
}
}
if (!(flags & CLUTTER_FEATURE_SYNC_TO_VBLANK))
CLUTTER_NOTE (BACKEND, "glXSwapIntervalSGI vblank setup failed");
}
if (!check_vblank_env ("dri") &&
!(flags & CLUTTER_FEATURE_SYNC_TO_VBLANK) &&
cogl_check_extension ("GLX_SGI_video_sync", glx_extensions))
{
CLUTTER_NOTE (BACKEND, "attempting glXGetVideoSyncSGI vblank setup");
backend_glx->get_video_sync =
(GetVideoSyncProc) cogl_get_proc_address ("glXGetVideoSyncSGI");
backend_glx->wait_video_sync =
(WaitVideoSyncProc) cogl_get_proc_address ("glXWaitVideoSyncSGI");
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;
}
if (!(flags & CLUTTER_FEATURE_SYNC_TO_VBLANK))
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;
}
if (!(flags & CLUTTER_FEATURE_SYNC_TO_VBLANK))
CLUTTER_NOTE (BACKEND, "DRI vblank setup failed");
}
#endif
if (!(flags & CLUTTER_FEATURE_SYNC_TO_VBLANK))
{
CLUTTER_NOTE (BACKEND,
"no use-able vblank mechanism found");
}
}
CLUTTER_NOTE (MISC, "backend features checked");
return flags;
}
