734f808fbc
* clutter/clutter-alpha.h: * clutter/clutter-alpha.c: Add a data parameter to the ClutterAlphaFunc; add a data+destroy parameter to clutter_alpha_set_func() and to clutter_alpha_new(), and turned the latter into clutter_alpha_new_full(); add a simple, empty constructor clutter_alpha_new(). These changes makes writing bindings a tad more easy, as bindings require passing their own functions in order to call the real alpha function. * clutter/clutter-behaviour.h: Clean up the header. * clutter/clutter-behaviours.[ch]: * clutter/clutter-behaviour-opacity.[ch]: * clutter/clutter-behaviour-path.[ch]: * clutter/clutter-behaviour-scale.[ch]: Split the ClutterBehaviourPath, ClutterBehaviourOpacity and ClutterBehaviourScale into their own files as they have been growing a bit. Fix ClutterBehaviourPath API. * clutter/clutter-media.h: Remove the commented "metadata_available" signal: gtk-doc chokes up on that. * clutter/clutter-timeline.h: * clutter/clutter-timeline.c: Remove the useless ClutterTimelineAlphaFunc signature; add missing accessor methods for the properties; clean up a bit. * clutter/clutter-util.h: * clutter/clutter-util.c: Remove unneeded function clutter_util_can_create_texture(). * clutter/clutter-feature.h: Sync the name of clutter_feature_get_all() with the name declared in clutter-feature.h. * clutter/Makefile.am: * clutter/clutter.h: Update. * examples/behave.c: Update to the new ClutterAlpha constructor. * examples/super-oh.c: Use the right pointer and avoid the compiler making a fuss about it.
320 lines
7.3 KiB
C
320 lines
7.3 KiB
C
/*
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* Clutter.
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*
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* An OpenGL based 'interactive canvas' library.
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*
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* Authored By Matthew Allum <mallum@openedhand.com>
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*
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* Copyright (C) 2006 OpenedHand
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:clutter-feature
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* @short_description: functions to query available GL features ay runtime
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*
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* Functions to query available GL features ay runtime
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*/
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#include "config.h"
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#include "clutter-main.h"
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#include "clutter-feature.h"
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <dlfcn.h>
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typedef void (*FuncPtr) (void);
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typedef int (*GLXGetVideoSyncProc) (unsigned int *count);
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typedef int (*GLXWaitVideoSyncProc) (int divisor,
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int remainder,
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unsigned int *count);
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typedef FuncPtr (*GLXGetProcAddressProc) (const guint8 *procName);
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typedef struct ClutterFeatureFuncs
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{
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GLXGetVideoSyncProc get_video_sync;
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GLXWaitVideoSyncProc wait_video_sync;
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} ClutterFeatureFuncs;
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typedef enum ClutterVBlankType
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{
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CLUTTER_VBLANK_NONE = 0,
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CLUTTER_VBLANK_GLX,
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CLUTTER_VBLANK_DRI
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} ClutterVBlankType;
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typedef struct ClutterFeatures
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{
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ClutterFeatureFlags flags;
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ClutterFeatureFuncs funcs;
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gint dri_fd;
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ClutterVBlankType vblank_type;
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} ClutterFeatures;
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static ClutterFeatures* __features = NULL;
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/* #ifdef linux */
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#define DRM_VBLANK_RELATIVE 0x1;
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struct drm_wait_vblank_request {
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int type;
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unsigned int sequence;
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unsigned long signal;
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};
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struct drm_wait_vblank_reply {
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int type;
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unsigned int sequence;
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long tval_sec;
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long tval_usec;
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};
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typedef union drm_wait_vblank {
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struct drm_wait_vblank_request request;
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struct drm_wait_vblank_reply reply;
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} drm_wait_vblank_t;
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#define DRM_IOCTL_BASE 'd'
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#define DRM_IOWR(nr,type) _IOWR(DRM_IOCTL_BASE,nr,type)
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#define DRM_IOCTL_WAIT_VBLANK DRM_IOWR(0x3a, drm_wait_vblank_t)
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static int drm_wait_vblank(int fd, drm_wait_vblank_t *vbl)
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{
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int ret, rc;
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do
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{
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ret = ioctl(fd, DRM_IOCTL_WAIT_VBLANK, vbl);
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vbl->request.type &= ~DRM_VBLANK_RELATIVE;
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rc = errno;
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}
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while (ret && rc == EINTR);
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return rc;
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}
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/* #endif */
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/* Note must be called after context created */
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static gboolean
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check_gl_extension (const gchar *name, const gchar *ext)
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{
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gchar *end;
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gint name_len, n;
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if (name == NULL || ext == NULL)
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return FALSE;
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end = (gchar*)(ext + strlen(ext));
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name_len = strlen(name);
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while (ext < end)
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{
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n = strcspn(ext, " ");
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if ((name_len == n) && (!strncmp(name, ext, n)))
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return TRUE;
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ext += (n + 1);
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}
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return FALSE;
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}
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static FuncPtr
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get_proc_address (const gchar *name)
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{
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static GLXGetProcAddressProc get_proc_func = NULL;
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static void *dlhand = NULL;
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if (get_proc_func == NULL && dlhand == NULL)
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{
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dlhand = dlopen (NULL, RTLD_LAZY);
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if (dlhand)
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{
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dlerror ();
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get_proc_func
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= (GLXGetProcAddressProc) dlsym (dlhand, "glXGetProcAddress");
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if (dlerror () != NULL)
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get_proc_func
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= (GLXGetProcAddressProc) dlsym (dlhand, "glXGetProcAddressARB");
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if (dlerror () != NULL)
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{
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get_proc_func = NULL;
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g_warning
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("failed to bind GLXGetProcAddress or GLXGetProcAddressARB");
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}
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}
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}
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if (get_proc_func)
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return get_proc_func ((unsigned char*)name);
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return NULL;
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}
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static gboolean
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check_vblank_env (const char *name)
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{
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const char *val;
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val = getenv("CLUTTER_VBLANK");
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if (val && !strcasecmp(val, name))
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return TRUE;
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return FALSE;
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}
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void
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clutter_feature_init (void)
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{
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const gchar *gl_extensions, *glx_extensions;
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if (__features != NULL)
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{
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g_warning ("You should never call clutter_feature_init() "
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"more than once.");
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return;
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}
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__features = g_new0 (ClutterFeatures, 1);
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memset(&__features->funcs, 0, sizeof(ClutterFeatureFuncs));
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gl_extensions = (const gchar*)glGetString(GL_EXTENSIONS);
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glx_extensions = glXQueryExtensionsString (clutter_xdisplay(),
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clutter_xscreen());
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if (check_gl_extension ("GL_ARB_texture_rectangle", gl_extensions))
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__features->flags |= CLUTTER_FEATURE_TEXTURE_RECTANGLE;
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/* vblank */
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__features->vblank_type = CLUTTER_VBLANK_NONE;
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if (getenv("__GL_SYNC_TO_VBLANK") || check_vblank_env("none"))
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{
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CLUTTER_DBG("vblank sync: disabled at user request");
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}
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else
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{
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if (!check_vblank_env("dri")
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&& check_gl_extension ("GLX_SGI_video_sync", glx_extensions))
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{
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__features->funcs.get_video_sync =
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(GLXGetVideoSyncProc) get_proc_address ("glXGetVideoSyncSGI");
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__features->funcs.wait_video_sync =
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(GLXWaitVideoSyncProc) get_proc_address ("glXWaitVideoSyncSGI");
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if (__features->funcs.get_video_sync != NULL
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&& __features->funcs.wait_video_sync != NULL)
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{
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CLUTTER_DBG("vblank sync: using glx");
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__features->vblank_type = CLUTTER_VBLANK_GLX;
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__features->flags |= CLUTTER_FEATURE_SYNC_TO_VBLANK;
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}
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}
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if (!(__features->flags & CLUTTER_FEATURE_SYNC_TO_VBLANK))
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{
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__features->dri_fd = open("/dev/dri/card0", O_RDWR);
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if (__features->dri_fd >= 0)
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{
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CLUTTER_DBG("vblank sync: using dri");
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__features->vblank_type = CLUTTER_VBLANK_DRI;
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__features->flags |= CLUTTER_FEATURE_SYNC_TO_VBLANK;
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}
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}
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if (!(__features->flags & CLUTTER_FEATURE_SYNC_TO_VBLANK))
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CLUTTER_DBG("vblank sync: no use-able mechanism found");
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}
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}
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/**
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* clutter_feature_available:
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* @feature: a #ClutterFeatureFlags
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*
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* Checks whether @feature is available. @feature can be a logical
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* OR of #ClutterFeatureFlags.
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*
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* Return value: %TRUE if a feature is available
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*
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* Since: 0.1.1
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*/
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gboolean
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clutter_feature_available (ClutterFeatureFlags feature)
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{
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return (__features->flags & feature);
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}
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/**
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* clutter_feature_get_all:
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*
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* Returns all the suppoerted features.
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*
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* Return value: a logical OR of all the supported features.
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*
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* Since: 0.1.1
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*/
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ClutterFeatureFlags
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clutter_feature_get_all (void)
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{
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return __features->flags;
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}
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void
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clutter_feature_wait_for_vblank (void)
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{
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switch (__features->vblank_type)
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{
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case CLUTTER_VBLANK_GLX:
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{
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unsigned int retraceCount;
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__features->funcs.get_video_sync(&retraceCount);
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__features->funcs.wait_video_sync(2,
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(retraceCount+1)%2, &retraceCount);
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}
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break;
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case CLUTTER_VBLANK_DRI:
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{
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drm_wait_vblank_t blank;
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blank.request.type = DRM_VBLANK_RELATIVE;
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blank.request.sequence = 1;
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drm_wait_vblank (__features->dri_fd, &blank);
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}
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break;
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case CLUTTER_VBLANK_NONE:
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default:
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break;
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}
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}
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