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f6ae9decaa
mutter/cogl/winsys/cogl-winsys-glx.c
Neil Roberts f6ae9decaa cogl-renderer: Move the XEvent filters to be generic for all renderers 
Instead of having cogl_renderer_xlib_add_filter and friends there is
now cogl_renderer_add_native_filter which can be used regardless of
the backend. The callback function for the filter now just takes a
void pointer instead of an XEvent pointer which should be interpreted
differently depending on the backend. For example, on Xlib it would
still be an XEvent but on Windows it could be a MSG. This simplifies
the code somewhat because the _cogl_xlib_add_filter no longer needs to
have its own filter list when a stub renderer is used because there is
always a renderer available.

cogl_renderer_xlib_handle_event has also been renamed to
cogl_renderer_handle_native_event. This just forwards the event on to
all of the listeners. The backend renderer is expected to register its
own event filter if it wants to process the events in some way.
2011-04-20 18:17:06 +01:00

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/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2007,2008,2009,2010,2011 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>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "cogl.h"
#include "cogl-winsys-private.h"
#include "cogl-feature-private.h"
#include "cogl-context-private.h"
#include "cogl-framebuffer.h"
#include "cogl-swap-chain-private.h"
#include "cogl-renderer-private.h"
#include "cogl-renderer-glx-private.h"
#include "cogl-onscreen-template-private.h"
#include "cogl-display-xlib-private.h"
#include "cogl-display-glx-private.h"
#include "cogl-private.h"
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <glib/gi18n-lib.h>
#include <dlfcn.h>
#include <GL/glx.h>
#include <X11/Xlib.h>
typedef CoglFuncPtr (*GLXGetProcAddressProc) (const GLubyte *procName);
#ifdef HAVE_DRM
#include <drm.h>
#include <sys/ioctl.h>
#include <errno.h>
#endif
typedef struct _CoglContextGLX
{
GLXDrawable current_drawable;
} CoglContextGLX;
typedef struct _CoglOnscreenXlib
{
Window xwin;
gboolean is_foreign_xwin;
} CoglOnscreenXlib;
typedef struct _CoglOnscreenGLX
{
CoglOnscreenXlib _parent;
GLXDrawable glxwin;
guint32 last_swap_vsync_counter;
GList *swap_callbacks;
} CoglOnscreenGLX;
typedef struct _CoglSwapBuffersNotifyEntry
{
CoglSwapBuffersNotify callback;
void *user_data;
unsigned int id;
} CoglSwapBuffersNotifyEntry;
/* Define a set of arrays containing the functions required from GL
for each winsys feature */
#define COGL_WINSYS_FEATURE_BEGIN(name, namespaces, extension_names, \
feature_flags, feature_flags_private, \
winsys_feature) \
static const CoglFeatureFunction \
cogl_glx_feature_ ## name ## _funcs[] = {
#define COGL_WINSYS_FEATURE_FUNCTION(ret, name, args) \
{ G_STRINGIFY (name), G_STRUCT_OFFSET (CoglRendererGLX, pf_ ## name) },
#define COGL_WINSYS_FEATURE_END() \
{ NULL, 0 }, \
};
#include "cogl-winsys-glx-feature-functions.h"
/* Define an array of features */
#undef COGL_WINSYS_FEATURE_BEGIN
#define COGL_WINSYS_FEATURE_BEGIN(name, namespaces, extension_names, \
feature_flags, feature_flags_private, \
winsys_feature) \
{ 255, 255, namespaces, extension_names, \
feature_flags, feature_flags_private, \
winsys_feature, \
cogl_glx_feature_ ## name ## _funcs },
#undef COGL_WINSYS_FEATURE_FUNCTION
#define COGL_WINSYS_FEATURE_FUNCTION(ret, name, args)
#undef COGL_WINSYS_FEATURE_END
#define COGL_WINSYS_FEATURE_END()
static const CoglFeatureData winsys_feature_data[] =
{
#include "cogl-winsys-glx-feature-functions.h"
};
CoglFuncPtr
_cogl_winsys_get_proc_address (const char *name)
{
static GLXGetProcAddressProc get_proc_func = NULL;
static void *dlhand = NULL;
if (get_proc_func == NULL && dlhand == NULL)
{
dlhand = dlopen (NULL, RTLD_LAZY);
if (!dlhand)
{
g_warning ("Failed to dlopen (NULL, RTDL_LAZY): %s", dlerror ());
return NULL;
}
dlerror ();
get_proc_func =
(GLXGetProcAddressProc) dlsym (dlhand, "glXGetProcAddress");
if (dlerror () != NULL)
{
get_proc_func =
(GLXGetProcAddressProc) dlsym (dlhand, "glXGetProcAddressARB");
}
if (dlerror () != NULL)
{
get_proc_func = NULL;
g_warning ("failed to bind GLXGetProcAddress "
"or GLXGetProcAddressARB");
}
}
if (get_proc_func)
return get_proc_func ((GLubyte *) name);
return NULL;
}
#undef COGL_WINSYS_FEATURE_BEGIN
#define COGL_WINSYS_FEATURE_BEGIN(a, b, c, d, e, f)
#undef COGL_WINSYS_FEATURE_FUNCTION
#define COGL_WINSYS_FEATURE_FUNCTION(ret, name, args) \
glx_renderer->pf_ ## name = NULL;
#undef COGL_WINSYS_FEATURE_END
#define COGL_WINSYS_FEATURE_END()
static void
initialize_function_table (CoglRenderer *renderer)
{
CoglRendererGLX *glx_renderer = renderer->winsys;
#include "cogl-winsys-glx-feature-functions.h"
}
static CoglOnscreen *
find_onscreen_for_xid (CoglContext *context, guint32 xid)
{
GList *l;
for (l = context->framebuffers; l; l = l->next)
{
CoglFramebuffer *framebuffer = l->data;
CoglOnscreenXlib *xlib_onscreen;
if (!framebuffer->type == COGL_FRAMEBUFFER_TYPE_ONSCREEN)
continue;
/* Does the GLXEvent have the GLXDrawable or the X Window? */
xlib_onscreen = COGL_ONSCREEN (framebuffer)->winsys;
if (xlib_onscreen->xwin == (Window)xid)
return COGL_ONSCREEN (framebuffer);
}
return NULL;
}
static void
notify_swap_buffers (CoglContext *context, GLXDrawable drawable)
{
CoglOnscreen *onscreen = find_onscreen_for_xid (context, (guint32)drawable);
CoglOnscreenGLX *glx_onscreen;
GList *l;
if (!onscreen)
return;
glx_onscreen = onscreen->winsys;
for (l = glx_onscreen->swap_callbacks; l; l = l->next)
{
CoglSwapBuffersNotifyEntry *entry = l->data;
entry->callback (COGL_FRAMEBUFFER (onscreen), entry->user_data);
}
}
static CoglFilterReturn
glx_event_filter_cb (void *native_event, void *data)
{
XEvent *xevent = native_event;
CoglContext *context = data;
#ifdef GLX_INTEL_swap_event
CoglRendererGLX *glx_renderer;
#endif
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);
}
/* we let ConfigureNotify pass through */
return COGL_FILTER_CONTINUE;
}
#ifdef GLX_INTEL_swap_event
glx_renderer = context->display->renderer->winsys;
if (xevent->type == (glx_renderer->glx_event_base + GLX_BufferSwapComplete))
{
GLXBufferSwapComplete *swap_event = (GLXBufferSwapComplete *) xevent;
notify_swap_buffers (context, swap_event->drawable);
/* remove SwapComplete events from the queue */
return COGL_FILTER_REMOVE;
}
#endif /* GLX_INTEL_swap_event */
return COGL_FILTER_CONTINUE;
}
gboolean
_cogl_winsys_renderer_connect (CoglRenderer *renderer,
GError **error)
{
CoglRendererGLX *glx_renderer;
CoglRendererXlib *xlib_renderer;
renderer->winsys = g_slice_new0 (CoglRendererGLX);
glx_renderer = renderer->winsys;
xlib_renderer = renderer->winsys;
if (!_cogl_renderer_xlib_connect (renderer, error))
goto error;
if (!glXQueryExtension (xlib_renderer->xdpy,
&glx_renderer->glx_error_base,
&glx_renderer->glx_event_base))
{
g_set_error (error, COGL_WINSYS_ERROR,
COGL_WINSYS_ERROR_INIT,
"XServer appears to lack required GLX support");
goto error;
}
/* XXX: Note: For a long time Mesa exported a hybrid GLX, exporting
* extensions specified to require GLX 1.3, but still reporting 1.2
* via glXQueryVersion. */
if (!glXQueryVersion (xlib_renderer->xdpy,
&glx_renderer->glx_major,
&glx_renderer->glx_minor)
|| !(glx_renderer->glx_major == 1 && glx_renderer->glx_minor >= 2))
{
g_set_error (error, COGL_WINSYS_ERROR,
COGL_WINSYS_ERROR_INIT,
"XServer appears to lack required GLX 1.2 support");
goto error;
}
glx_renderer->dri_fd = -1;
return TRUE;
error:
_cogl_winsys_renderer_disconnect (renderer);
return FALSE;
}
void
_cogl_winsys_renderer_disconnect (CoglRenderer *renderer)
{
_cogl_renderer_xlib_disconnect (renderer);
g_slice_free (CoglRendererGLX, renderer->winsys);
}
void
update_winsys_features (CoglContext *context)
{
CoglDisplayGLX *glx_display = context->display->winsys;
CoglRendererXlib *xlib_renderer = context->display->renderer->winsys;
CoglRendererGLX *glx_renderer = context->display->renderer->winsys;
const char *glx_extensions;
int i;
g_return_if_fail (glx_display->glx_context);
_cogl_gl_update_features (context);
_cogl_bitmask_init (&context->winsys_features);
glx_extensions =
glXQueryExtensionsString (xlib_renderer->xdpy,
DefaultScreen (xlib_renderer->xdpy));
COGL_NOTE (WINSYS, " GLX Extensions: %s", glx_extensions);
context->feature_flags |= COGL_FEATURE_ONSCREEN_MULTIPLE;
_cogl_bitmask_set (&context->winsys_features,
COGL_WINSYS_FEATURE_MULTIPLE_ONSCREEN,
TRUE);
initialize_function_table (context->display->renderer);
for (i = 0; i < G_N_ELEMENTS (winsys_feature_data); i++)
if (_cogl_feature_check ("GLX", winsys_feature_data + i, 0, 0,
glx_extensions,
glx_renderer))
{
context->feature_flags |= winsys_feature_data[i].feature_flags;
if (winsys_feature_data[i].winsys_feature)
_cogl_bitmask_set (&context->winsys_features,
winsys_feature_data[i].winsys_feature,
TRUE);
}
/* Note: the GLX_SGI_video_sync spec explicitly states this extension
* only works for direct contexts. */
if (!glx_renderer->is_direct)
{
glx_renderer->pf_glXGetVideoSync = NULL;
glx_renderer->pf_glXWaitVideoSync = NULL;
}
if (glx_renderer->pf_glXWaitVideoSync)
_cogl_bitmask_set (&context->winsys_features,
COGL_WINSYS_FEATURE_VBLANK_WAIT,
TRUE);
#ifdef HAVE_DRM
/* drm is really an extreme fallback -rumoured to work with Via
* chipsets... */
if (!glx_renderer->pf_glXWaitVideoSync)
{
if (glx_renderer->dri_fd < 0)
glx_renderer->dri_fd = open("/dev/dri/card0", O_RDWR);
if (glx_renderer->dri_fd >= 0)
_cogl_bitmask_set (&context->winsys_features,
COGL_WINSYS_FEATURE_VBLANK_WAIT,
TRUE);
}
#endif
if (glx_renderer->pf_glXCopySubBuffer || context->drv.pf_glBlitFramebuffer)
_cogl_bitmask_set (&context->winsys_features,
COGL_WINSYS_FEATURE_SWAP_REGION, TRUE);
/* Note: glXCopySubBuffer and glBlitFramebuffer won't be throttled
* by the SwapInterval so we have to throttle swap_region requests
* manually... */
if (_cogl_winsys_has_feature (COGL_WINSYS_FEATURE_SWAP_REGION) &&
_cogl_winsys_has_feature (COGL_WINSYS_FEATURE_VBLANK_WAIT))
_cogl_bitmask_set (&context->winsys_features,
COGL_WINSYS_FEATURE_SWAP_REGION_THROTTLE, TRUE);
}
/* 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. */
static gboolean
find_fbconfig (CoglDisplay *display,
gboolean with_alpha,
GLXFBConfig *config_ret,
GError **error)
{
CoglRendererXlib *xlib_renderer = display->renderer->winsys;
GLXFBConfig *configs = NULL;
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
};
gboolean ret = TRUE;
int xscreen_num = DefaultScreen (xlib_renderer->xdpy);
configs = glXChooseFBConfig (xlib_renderer->xdpy,
xscreen_num,
attributes,
&n_configs);
if (!configs || n_configs == 0)
{
g_set_error (error, COGL_WINSYS_ERROR,
COGL_WINSYS_ERROR_CREATE_CONTEXT,
"Failed to find any compatible fbconfigs");
ret = FALSE;
goto done;
}
if (with_alpha)
{
for (i = 0; i < n_configs; i++)
{
XVisualInfo *vinfo;
vinfo = glXGetVisualFromFBConfig (xlib_renderer->xdpy, configs[i]);
if (vinfo == NULL)
continue;
if (vinfo->depth == 32 &&
(vinfo->red_mask | vinfo->green_mask | vinfo->blue_mask)
!= 0xffffffff)
{
COGL_NOTE (WINSYS, "Found an ARGB FBConfig [index:%d]", i);
*config_ret = configs[i];
goto done;
}
}
/* If we make it here then we didn't find an RGBA config so
we'll fall back to using an RGB config */
g_set_error (error, COGL_WINSYS_ERROR,
COGL_WINSYS_ERROR_CREATE_CONTEXT,
"Unable to find fbconfig with rgba visual");
ret = FALSE;
goto done;
}
else
{
COGL_NOTE (WINSYS, "Using the first available FBConfig");
*config_ret = configs[0];
}
done:
XFree (configs);
return ret;
}
static gboolean
create_context (CoglDisplay *display, GError **error)
{
CoglDisplayGLX *glx_display = display->winsys;
CoglDisplayXlib *xlib_display = display->winsys;
CoglRendererXlib *xlib_renderer = display->renderer->winsys;
CoglRendererGLX *glx_renderer = display->renderer->winsys;
gboolean support_transparent_windows;
GLXFBConfig config;
GError *fbconfig_error = NULL;
XSetWindowAttributes attrs;
XVisualInfo *xvisinfo;
GLXDrawable dummy_drawable;
CoglXlibTrapState old_state;
g_return_val_if_fail (glx_display->glx_context == NULL, TRUE);
if (display->onscreen_template &&
display->onscreen_template->swap_chain &&
display->onscreen_template->swap_chain->has_alpha)
support_transparent_windows = TRUE;
else
support_transparent_windows = FALSE;
glx_display->found_fbconfig =
find_fbconfig (display, support_transparent_windows, &config,
&fbconfig_error);
if (!glx_display->found_fbconfig)
{
g_set_error (error, COGL_WINSYS_ERROR,
COGL_WINSYS_ERROR_CREATE_CONTEXT,
"Unable to find suitable fbconfig for the GLX context: %s",
fbconfig_error->message);
g_error_free (fbconfig_error);
return FALSE;
}
glx_display->fbconfig = config;
glx_display->fbconfig_has_rgba_visual = support_transparent_windows;
COGL_NOTE (WINSYS, "Creating GLX Context (display: %p)",
xlib_renderer->xdpy);
glx_display->glx_context = glXCreateNewContext (xlib_renderer->xdpy,
config,
GLX_RGBA_TYPE,
NULL,
True);
if (glx_display->glx_context == NULL)
{
g_set_error (error, COGL_WINSYS_ERROR,
COGL_WINSYS_ERROR_CREATE_CONTEXT,
"Unable to create suitable GL context");
return FALSE;
}
glx_renderer->is_direct =
glXIsDirect (xlib_renderer->xdpy, glx_display->glx_context);
COGL_NOTE (WINSYS, "Setting %s context",
glx_renderer->is_direct ? "direct" : "indirect");
/* XXX: GLX doesn't let us make a context current without a window
* so we create a dummy window that we can use while no CoglOnscreen
* framebuffer is in use.
*/
xvisinfo = glXGetVisualFromFBConfig (xlib_renderer->xdpy, config);
if (xvisinfo == NULL)
{
g_set_error (error, COGL_WINSYS_ERROR,
COGL_WINSYS_ERROR_CREATE_CONTEXT,
"Unable to retrieve the X11 visual");
return FALSE;
}
_cogl_renderer_xlib_trap_errors (display->renderer, &old_state);
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);
/* 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 (glx_renderer->glx_major == 1 && glx_renderer->glx_minor >= 3)
{
glx_display->dummy_glxwin = glXCreateWindow (xlib_renderer->xdpy,
config,
xlib_display->dummy_xwin,
NULL);
}
if (glx_display->dummy_glxwin)
dummy_drawable = glx_display->dummy_glxwin;
else
dummy_drawable = xlib_display->dummy_xwin;
COGL_NOTE (WINSYS, "Selecting dummy 0x%x for the GLX context",
(unsigned int) dummy_drawable);
glXMakeContextCurrent (xlib_renderer->xdpy,
dummy_drawable,
dummy_drawable,
glx_display->glx_context);
XFree (xvisinfo);
if (_cogl_renderer_xlib_untrap_errors (display->renderer, &old_state))
{
g_set_error (error, COGL_WINSYS_ERROR,
COGL_WINSYS_ERROR_CREATE_CONTEXT,
"Unable to select the newly created GLX context");
return FALSE;
}
return TRUE;
}
gboolean
_cogl_winsys_display_setup (CoglDisplay *display,
GError **error)
{
CoglDisplayGLX *glx_display;
int i;
g_return_val_if_fail (display->winsys == NULL, FALSE);
glx_display = g_slice_new0 (CoglDisplayGLX);
display->winsys = glx_display;
if (!create_context (display, error))
goto error;
for (i = 0; i < COGL_GLX_N_CACHED_CONFIGS; i++)
glx_display->glx_cached_configs[i].depth = -1;
return TRUE;
error:
_cogl_winsys_display_destroy (display);
return FALSE;
}
void
_cogl_winsys_display_destroy (CoglDisplay *display)
{
CoglDisplayGLX *glx_display = display->winsys;
CoglDisplayXlib *xlib_display = display->winsys;
CoglRendererXlib *xlib_renderer = display->renderer->winsys;
g_return_if_fail (glx_display != NULL);
if (glx_display->glx_context)
{
glXMakeContextCurrent (xlib_renderer->xdpy, None, None, NULL);
glXDestroyContext (xlib_renderer->xdpy, glx_display->glx_context);
glx_display->glx_context = NULL;
}
if (glx_display->dummy_glxwin)
{
glXDestroyWindow (xlib_renderer->xdpy, glx_display->dummy_glxwin);
glx_display->dummy_glxwin = None;
}
if (xlib_display->dummy_xwin)
{
XDestroyWindow (xlib_renderer->xdpy, xlib_display->dummy_xwin);
xlib_display->dummy_xwin = None;
}
g_slice_free (CoglDisplayGLX, display->winsys);
display->winsys = NULL;
}
gboolean
_cogl_winsys_context_init (CoglContext *context, GError **error)
{
context->winsys = g_new0 (CoglContextGLX, 1);
cogl_renderer_add_native_filter (context->display->renderer,
glx_event_filter_cb,
context);
update_winsys_features (context);
return TRUE;
}
void
_cogl_winsys_context_deinit (CoglContext *context)
{
cogl_renderer_remove_native_filter (context->display->renderer,
glx_event_filter_cb,
context);
g_free (context->winsys);
}
gboolean
_cogl_winsys_onscreen_init (CoglOnscreen *onscreen,
GError **error)
{
CoglFramebuffer *framebuffer = COGL_FRAMEBUFFER (onscreen);
CoglContext *context = framebuffer->context;
CoglDisplay *display = context->display;
CoglDisplayGLX *glx_display = display->winsys;
CoglRendererXlib *xlib_renderer = display->renderer->winsys;
CoglRendererGLX *glx_renderer = display->renderer->winsys;
Window xwin;
CoglOnscreenXlib *xlib_onscreen;
CoglOnscreenGLX *glx_onscreen;
g_return_val_if_fail (glx_display->glx_context, FALSE);
/* 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_renderer_xlib_trap_errors (display->renderer, &state);
status = XGetWindowAttributes (xlib_renderer->xdpy, xwin, &attr);
XSync (xlib_renderer->xdpy, False);
xerror = _cogl_renderer_xlib_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);
}
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_renderer_xlib_trap_errors (display->renderer, &state);
xvisinfo = glXGetVisualFromFBConfig (xlib_renderer->xdpy,
glx_display->fbconfig);
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);
mask = CWBorderPixel | CWColormap;
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_renderer_xlib_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;
}
}
onscreen->winsys = g_slice_new0 (CoglOnscreenGLX);
xlib_onscreen = onscreen->winsys;
glx_onscreen = onscreen->winsys;
xlib_onscreen->xwin = xwin;
xlib_onscreen->is_foreign_xwin = onscreen->foreign_xid ? TRUE : FALSE;
/* 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 (glx_renderer->glx_major == 1 && glx_renderer->glx_minor >= 3)
{
glx_onscreen->glxwin =
glXCreateWindow (xlib_renderer->xdpy,
glx_display->fbconfig,
xlib_onscreen->xwin,
NULL);
}
#ifdef GLX_INTEL_swap_event
if (_cogl_winsys_has_feature (COGL_WINSYS_FEATURE_SWAP_BUFFERS_EVENT))
{
GLXDrawable drawable =
glx_onscreen->glxwin ? glx_onscreen->glxwin : xlib_onscreen->xwin;
/* similarly to above, we unconditionally select this event
* because we rely on it to advance the master clock, and
* drive redraw/relayout, animations and event handling.
*/
glXSelectEvent (xlib_renderer->xdpy,
drawable,
GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK);
}
#endif /* GLX_INTEL_swap_event */
return TRUE;
}
void
_cogl_winsys_onscreen_deinit (CoglOnscreen *onscreen)
{
CoglFramebuffer *framebuffer = COGL_FRAMEBUFFER (onscreen);
CoglContext *context = framebuffer->context;
CoglRendererXlib *xlib_renderer = context->display->renderer->winsys;
CoglXlibTrapState old_state;
CoglOnscreenXlib *xlib_onscreen = onscreen->winsys;
CoglOnscreenGLX *glx_onscreen = onscreen->winsys;
_cogl_xlib_trap_errors (&old_state);
if (glx_onscreen->glxwin != None)
{
glXDestroyWindow (xlib_renderer->xdpy, glx_onscreen->glxwin);
glx_onscreen->glxwin = None;
}
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);
_cogl_xlib_untrap_errors (&old_state);
}
void
_cogl_winsys_onscreen_bind (CoglOnscreen *onscreen)
{
CoglContext *context = COGL_FRAMEBUFFER (onscreen)->context;
CoglContextGLX *glx_context = context->winsys;
CoglDisplayXlib *xlib_display = context->display->winsys;
CoglDisplayGLX *glx_display = context->display->winsys;
CoglRendererXlib *xlib_renderer = context->display->renderer->winsys;
CoglRendererGLX *glx_renderer = context->display->renderer->winsys;
CoglOnscreenXlib *xlib_onscreen = onscreen->winsys;
CoglOnscreenGLX *glx_onscreen = onscreen->winsys;
CoglXlibTrapState old_state;
GLXDrawable drawable;
if (G_UNLIKELY (!onscreen))
{
drawable =
glx_display->dummy_glxwin ?
glx_display->dummy_glxwin : xlib_display->dummy_xwin;
if (glx_context->current_drawable == drawable)
return;
_cogl_xlib_trap_errors (&old_state);
glXMakeContextCurrent (xlib_renderer->xdpy,
drawable, drawable,
glx_display->glx_context);
}
else
{
drawable =
glx_onscreen->glxwin ? glx_onscreen->glxwin : xlib_onscreen->xwin;
if (glx_context->current_drawable == drawable)
return;
_cogl_xlib_trap_errors (&old_state);
COGL_NOTE (WINSYS,
"MakeContextCurrent dpy: %p, window: 0x%x (%s), context: %p",
xlib_renderer->xdpy,
(unsigned int) drawable,
xlib_onscreen->is_foreign_xwin ? "foreign" : "native",
glx_display->glx_context);
glXMakeContextCurrent (xlib_renderer->xdpy,
drawable,
drawable,
glx_display->glx_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.
*
* Note: we explicitly set to 0 when we aren't using the swap
* interval to synchronize since some drivers have a default
* swap interval of 1. Sadly some drivers even ignore requests
* to disable the swap interval.
*
* NB: glXSwapIntervalSGI applies to the context not the
* drawable which is why we can't just do this once when the
* framebuffer is allocated.
*
* FIXME: We should check for GLX_EXT_swap_control which allows
* per framebuffer swap intervals. GLX_MESA_swap_control also
* allows per-framebuffer swap intervals but the semantics tend
* to be more muddled since Mesa drivers tend to expose both the
* MESA and SGI extensions which should technically be mutually
* exclusive.
*/
if (glx_renderer->pf_glXSwapInterval)
{
if (onscreen->swap_throttled)
glx_renderer->pf_glXSwapInterval (1);
else
glx_renderer->pf_glXSwapInterval (0);
}
}
XSync (xlib_renderer->xdpy, False);
/* FIXME: We should be reporting a GError here
*/
if (_cogl_xlib_untrap_errors (&old_state))
{
g_warning ("X Error received while making drawable 0x%08lX current",
drawable);
return;
}
glx_context->current_drawable = drawable;
}
#ifdef HAVE_DRM
static int
drm_wait_vblank (int fd, drm_wait_vblank_t *vbl)
{
int ret, rc;
do
{
ret = ioctl (fd, DRM_IOCTL_WAIT_VBLANK, vbl);
vbl->request.type &= ~_DRM_VBLANK_RELATIVE;
rc = errno;
}
while (ret && rc == EINTR);
return rc;
}
#endif /* HAVE_DRM */
void
_cogl_winsys_wait_for_vblank (void)
{
CoglRendererGLX *glx_renderer;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
glx_renderer = ctx->display->renderer->winsys;
if (glx_renderer->pf_glXGetVideoSync)
{
guint32 current_count;
glx_renderer->pf_glXGetVideoSync (&current_count);
glx_renderer->pf_glXWaitVideoSync (2,
(current_count + 1) % 2,
&current_count);
}
#ifdef HAVE_DRM
else
{
drm_wait_vblank_t blank;
COGL_NOTE (WINSYS, "Waiting for vblank (drm)");
blank.request.type = _DRM_VBLANK_RELATIVE;
blank.request.sequence = 1;
blank.request.signal = 0;
drm_wait_vblank (glx_renderer->dri_fd, &blank);
}
#endif /* HAVE_DRM */
}
void
_cogl_winsys_onscreen_swap_region (CoglOnscreen *onscreen,
int *rectangles,
int n_rectangles)
{
CoglFramebuffer *framebuffer = COGL_FRAMEBUFFER (onscreen);
CoglContext *context = framebuffer->context;
CoglRendererXlib *xlib_renderer = context->display->renderer->winsys;
CoglRendererGLX *glx_renderer = context->display->renderer->winsys;
CoglOnscreenXlib *xlib_onscreen = onscreen->winsys;
CoglOnscreenGLX *glx_onscreen = onscreen->winsys;
GLXDrawable drawable =
glx_onscreen->glxwin ? glx_onscreen->glxwin : xlib_onscreen->xwin;
guint32 end_frame_vsync_counter = 0;
gboolean have_counter;
gboolean can_wait;
_cogl_framebuffer_flush_state (framebuffer,
framebuffer,
COGL_FRAMEBUFFER_FLUSH_BIND_ONLY);
if (onscreen->swap_throttled)
{
have_counter =
_cogl_winsys_has_feature (COGL_WINSYS_FEATURE_VBLANK_COUNTER);
can_wait = _cogl_winsys_has_feature (COGL_WINSYS_FEATURE_VBLANK_WAIT);
}
else
{
have_counter = FALSE;
can_wait = FALSE;
}
/* We need to ensure that all the rendering is done, otherwise
* redraw operations that are slower than the framerate can
* queue up in the pipeline during a heavy animation, causing a
* larger and larger backlog of rendering visible as lag to the
* user.
*
* For an exaggerated example consider rendering at 60fps (so 16ms
* per frame) and you have a really slow frame that takes 160ms to
* render, even though painting the scene and issuing the commands
* to the GPU takes no time at all. If all we did was use the
* video_sync extension to throttle the painting done by the CPU
* then every 16ms we would have another frame queued up even though
* the GPU has only rendered one tenth of the current frame. By the
* time the GPU would get to the 2nd frame there would be 9 frames
* waiting to be rendered.
*
* The problem is that we don't currently have a good way to throttle
* the GPU, only the CPU so we have to resort to synchronizing the
* GPU with the CPU to throttle it.
*
* Note: since calling glFinish() and synchronizing the CPU with
* the GPU is far from ideal, we hope that this is only a short
* term solution.
* - One idea is to using sync objects to track render
* completion so we can throttle the backlog (ideally with an
* additional extension that lets us get notifications in our
* mainloop instead of having to busy wait for the
* completion.)
* - Another option is to support clipped redraws by reusing the
* contents of old back buffers such that we can flip instead
* of using a blit and then we can use GLX_INTEL_swap_events
* to throttle. For this though we would still probably want an
* additional extension so we can report the limited region of
* the window damage to X/compositors.
*/
glFinish ();
if (have_counter && can_wait)
{
end_frame_vsync_counter = _cogl_winsys_get_vsync_counter ();
/* If we have the GLX_SGI_video_sync extension then we can
* be a bit smarter about how we throttle blits by avoiding
* any waits if we can see that the video sync count has
* already progressed. */
if (glx_onscreen->last_swap_vsync_counter == end_frame_vsync_counter)
_cogl_winsys_wait_for_vblank ();
}
else if (can_wait)
_cogl_winsys_wait_for_vblank ();
if (glx_renderer->pf_glXCopySubBuffer)
{
Display *xdpy = xlib_renderer->xdpy;
int i;
for (i = 0; i < n_rectangles; i++)
{
int *rect = &rectangles[4 * i];
glx_renderer->pf_glXCopySubBuffer (xdpy, drawable,
rect[0], rect[1], rect[2], rect[3]);
}
}
else if (context->drv.pf_glBlitFramebuffer)
{
int i;
/* XXX: checkout how this state interacts with the code to use
* glBlitFramebuffer in Neil's texture atlasing branch */
glDrawBuffer (GL_FRONT);
for (i = 0; i < n_rectangles; i++)
{
int *rect = &rectangles[4 * i];
int x2 = rect[0] + rect[2];
int y2 = rect[1] + rect[3];
context->drv.pf_glBlitFramebuffer (rect[0], rect[1], x2, y2,
rect[0], rect[1], x2, y2,
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
* a finite amount of time since otherwise the driver can batch
* the command indefinitely. */
glFlush ();
/* NB: It's important we save the counter we read before acting on
* the swap request since if we are mixing and matching different
* swap methods between frames we don't want to read the timer e.g.
* after calling glFinish() some times and not for others.
*
* In other words; this way we consistently save the time at the end
* of the applications frame such that the counter isn't muddled by
* the varying costs of different swap methods.
*/
if (have_counter)
glx_onscreen->last_swap_vsync_counter = end_frame_vsync_counter;
}
guint32
_cogl_winsys_get_vsync_counter (void)
{
guint32 video_sync_count;
CoglRendererGLX *glx_renderer;
_COGL_GET_CONTEXT (ctx, 0);
glx_renderer = ctx->display->renderer->winsys;
glx_renderer->pf_glXGetVideoSync (&video_sync_count);
return video_sync_count;
}
void
_cogl_winsys_onscreen_swap_buffers (CoglOnscreen *onscreen)
{
CoglFramebuffer *framebuffer = COGL_FRAMEBUFFER (onscreen);
CoglContext *context = framebuffer->context;
CoglRendererXlib *xlib_renderer = context->display->renderer->winsys;
CoglRendererGLX *glx_renderer = context->display->renderer->winsys;
CoglOnscreenXlib *xlib_onscreen = onscreen->winsys;
CoglOnscreenGLX *glx_onscreen = onscreen->winsys;
gboolean have_counter;
GLXDrawable drawable;
/* XXX: theoretically this shouldn't be necessary but at least with
* the Intel drivers we have see that if we don't call
* glXMakeContextCurrent for the drawable we are swapping then
* we get a BadDrawable error from the X server. */
_cogl_framebuffer_flush_state (framebuffer,
framebuffer,
COGL_FRAMEBUFFER_FLUSH_BIND_ONLY);
drawable = glx_onscreen->glxwin ? glx_onscreen->glxwin : xlib_onscreen->xwin;
if (onscreen->swap_throttled)
{
guint32 end_frame_vsync_counter = 0;
have_counter =
_cogl_winsys_has_feature (COGL_WINSYS_FEATURE_VBLANK_COUNTER);
/* If the swap_region API is also being used then we need to track
* the vsync counter for each swap request so we can manually
* throttle swap_region requests. */
if (have_counter)
end_frame_vsync_counter = _cogl_winsys_get_vsync_counter ();
if (!glx_renderer->pf_glXSwapInterval)
{
gboolean can_wait =
_cogl_winsys_has_feature (COGL_WINSYS_FEATURE_VBLANK_WAIT);
/* If we are going to wait for VBLANK manually, we not only
* need to flush out pending drawing to the GPU before we
* sleep, we need to wait for it to finish. Otherwise, we
* may end up with the situation:
*
* - We finish drawing - GPU drawing continues
* - We go to sleep - GPU drawing continues
* VBLANK - We call glXSwapBuffers - GPU drawing continues
* - GPU drawing continues
* - Swap buffers happens
*
* Producing a tear. Calling glFinish() first will cause us
* to properly wait for the next VBLANK before we swap. This
* obviously does not happen when we use _GLX_SWAP and let
* the driver do the right thing
*/
glFinish ();
if (have_counter && can_wait)
{
if (glx_onscreen->last_swap_vsync_counter ==
end_frame_vsync_counter)
_cogl_winsys_wait_for_vblank ();
}
else if (can_wait)
_cogl_winsys_wait_for_vblank ();
}
}
else
have_counter = FALSE;
glXSwapBuffers (xlib_renderer->xdpy, drawable);
if (have_counter)
glx_onscreen->last_swap_vsync_counter = _cogl_winsys_get_vsync_counter ();
}
guint32
_cogl_winsys_onscreen_x11_get_window_xid (CoglOnscreen *onscreen)
{
CoglOnscreenXlib *xlib_onscreen = onscreen->winsys;
return xlib_onscreen->xwin;
}
unsigned int
_cogl_winsys_onscreen_add_swap_buffers_callback (CoglOnscreen *onscreen,
CoglSwapBuffersNotify callback,
void *user_data)
{
CoglOnscreenGLX *glx_onscreen = onscreen->winsys;
CoglSwapBuffersNotifyEntry *entry = g_slice_new0 (CoglSwapBuffersNotifyEntry);
static int next_swap_buffers_callback_id = 0;
entry->callback = callback;
entry->user_data = user_data;
entry->id = next_swap_buffers_callback_id++;
glx_onscreen->swap_callbacks =
g_list_prepend (glx_onscreen->swap_callbacks, entry);
return entry->id;
}
void
_cogl_winsys_onscreen_remove_swap_buffers_callback (CoglOnscreen *onscreen,
unsigned int id)
{
CoglOnscreenGLX *glx_onscreen = onscreen->winsys;
GList *l;
for (l = glx_onscreen->swap_callbacks; l; l = l->next)
{
CoglSwapBuffersNotifyEntry *entry = l->data;
if (entry->id == id)
{
g_slice_free (CoglSwapBuffersNotifyEntry, entry);
glx_onscreen->swap_callbacks =
g_list_delete_link (glx_onscreen->swap_callbacks, l);
return;
}
}
}
void
_cogl_winsys_onscreen_update_swap_throttled (CoglOnscreen *onscreen)
{
CoglContext *context = COGL_FRAMEBUFFER (onscreen)->context;
CoglContextGLX *glx_context = context->winsys;
CoglOnscreenGLX *glx_onscreen = onscreen->winsys;
CoglOnscreenXlib *xlib_onscreen = onscreen->winsys;
GLXDrawable drawable =
glx_onscreen->glxwin ? glx_onscreen->glxwin : xlib_onscreen->xwin;
if (glx_context->current_drawable != drawable)
return;
glx_context->current_drawable = 0;
_cogl_winsys_onscreen_bind (onscreen);
}
/* FIXME: we should distinguish renderer and context features */
gboolean
_cogl_winsys_has_feature (CoglWinsysFeature feature)
{
_COGL_GET_CONTEXT (ctx, FALSE);
return _cogl_bitmask_get (&ctx->winsys_features, feature);
}
/* XXX: This is a particularly hacky _cogl_winsys interface... */
XVisualInfo *
_cogl_winsys_xlib_get_visual_info (void)
{
CoglDisplayGLX *glx_display;
CoglRendererXlib *xlib_renderer;
_COGL_GET_CONTEXT (ctx, NULL);
g_return_val_if_fail (ctx->display->winsys, FALSE);
glx_display = ctx->display->winsys;
xlib_renderer = ctx->display->renderer->winsys;
if (!glx_display->found_fbconfig)
return NULL;
return glXGetVisualFromFBConfig (xlib_renderer->xdpy, glx_display->fbconfig);
}
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