mirror of
https://github.com/brl/mutter.git
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142b229c5c
This adds a stop-gap mechanism for Cogl to know when the window system is requested to present the current backbuffer to the frontbuffer by adding a _cogl_swap_buffers_notify function that backends are now expected to call right after issuing the equivalent request to OpenGL vie the platforms OpenGL binding layer. This (blindly) updates all the backends to call this new function. For now Cogl doesn't do anything with the notification but the intention is to use it as part of a planned read-pixel optimization which will need to reset some state at the start of each new frame.
584 lines
19 KiB
C
584 lines
19 KiB
C
#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "clutter-stage-egl.h"
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#include "clutter-egl.h"
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#include "clutter-backend-egl.h"
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#include "clutter-debug.h"
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#include "clutter-event.h"
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#include "clutter-enum-types.h"
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#include "clutter-feature.h"
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#include "clutter-main.h"
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#include "clutter-private.h"
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#include "clutter-actor-private.h"
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#include "clutter-stage-private.h"
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#include "clutter-util.h"
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#ifdef COGL_HAS_X11_SUPPORT
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static ClutterStageWindowIface *clutter_stage_egl_parent_iface = NULL;
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#endif
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static void clutter_stage_window_iface_init (ClutterStageWindowIface *iface);
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G_DEFINE_TYPE_WITH_CODE (ClutterStageEGL,
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_clutter_stage_egl,
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#ifdef COGL_HAS_X11_SUPPORT
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CLUTTER_TYPE_STAGE_X11,
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#else
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G_TYPE_OBJECT,
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#endif
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G_IMPLEMENT_INTERFACE (CLUTTER_TYPE_STAGE_WINDOW,
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clutter_stage_window_iface_init));
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#ifdef COGL_HAS_XLIB_SUPPORT
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static void
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clutter_stage_egl_unrealize (ClutterStageWindow *stage_window)
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{
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ClutterBackend *backend = clutter_get_default_backend ();
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ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend);
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ClutterStageEGL *stage_egl = CLUTTER_STAGE_EGL (stage_window);
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ClutterStageX11 *stage_x11 = CLUTTER_STAGE_X11 (stage_window);
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CLUTTER_NOTE (BACKEND, "Unrealizing stage");
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clutter_x11_trap_x_errors ();
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if (!stage_x11->is_foreign_xwin && stage_x11->xwin != None)
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{
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XDestroyWindow (backend_x11->xdpy, stage_x11->xwin);
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stage_x11->xwin = None;
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}
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else
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stage_x11->xwin = None;
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if (stage_egl->egl_surface != EGL_NO_SURFACE)
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{
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eglDestroySurface (clutter_egl_get_egl_display (), stage_egl->egl_surface);
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stage_egl->egl_surface = EGL_NO_SURFACE;
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}
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XSync (backend_x11->xdpy, False);
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clutter_x11_untrap_x_errors ();
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}
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static gboolean
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clutter_stage_egl_realize (ClutterStageWindow *stage_window)
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{
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ClutterStageEGL *stage_egl = CLUTTER_STAGE_EGL (stage_window);
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ClutterStageX11 *stage_x11 = CLUTTER_STAGE_X11 (stage_window);
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ClutterBackend *backend;
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ClutterBackendEGL *backend_egl;
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ClutterBackendX11 *backend_x11;
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EGLDisplay edpy;
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CLUTTER_NOTE (BACKEND, "Realizing main stage");
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backend = clutter_get_default_backend ();
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backend_egl = CLUTTER_BACKEND_EGL (backend);
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backend_x11 = CLUTTER_BACKEND_X11 (backend);
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edpy = clutter_egl_get_egl_display ();
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if (stage_x11->xwin == None)
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{
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XSetWindowAttributes xattr;
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unsigned long mask;
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XVisualInfo *xvisinfo;
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gfloat width, height;
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CLUTTER_NOTE (MISC, "Creating stage X window");
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xvisinfo = clutter_backend_x11_get_visual_info (backend_x11);
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if (xvisinfo == NULL)
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{
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g_critical ("Unable to find suitable GL visual.");
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return FALSE;
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}
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/* window attributes */
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xattr.background_pixel = WhitePixel (backend_x11->xdpy,
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backend_x11->xscreen_num);
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xattr.border_pixel = 0;
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xattr.colormap = XCreateColormap (backend_x11->xdpy,
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backend_x11->xwin_root,
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xvisinfo->visual,
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AllocNone);
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mask = CWBorderPixel | CWColormap;
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/* Call get_size - this will either get the geometry size (which
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* before we create the window is set to 640x480), or if a size
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* is set, it will get that. This lets you set a size on the
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* stage before it's realized.
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*/
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clutter_actor_get_size (CLUTTER_ACTOR (stage_x11->wrapper),
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&width,
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&height);
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stage_x11->xwin_width = (gint)width;
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stage_x11->xwin_height = (gint)height;
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stage_x11->xwin = XCreateWindow (backend_x11->xdpy,
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backend_x11->xwin_root,
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0, 0,
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stage_x11->xwin_width,
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stage_x11->xwin_height,
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0,
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xvisinfo->depth,
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InputOutput,
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xvisinfo->visual,
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mask, &xattr);
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CLUTTER_NOTE (BACKEND, "Stage [%p], window: 0x%x, size: %dx%d",
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stage_window,
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(unsigned int) stage_x11->xwin,
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stage_x11->xwin_width,
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stage_x11->xwin_height);
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XFree (xvisinfo);
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}
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if (stage_egl->egl_surface == EGL_NO_SURFACE)
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{
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stage_egl->egl_surface =
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eglCreateWindowSurface (edpy,
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backend_egl->egl_config,
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(NativeWindowType) stage_x11->xwin,
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NULL);
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}
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if (stage_egl->egl_surface == EGL_NO_SURFACE)
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g_warning ("Unable to create an EGL surface");
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if (clutter_x11_has_event_retrieval ())
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{
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if (clutter_x11_has_xinput ())
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{
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XSelectInput (backend_x11->xdpy, stage_x11->xwin,
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StructureNotifyMask |
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FocusChangeMask |
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ExposureMask |
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EnterWindowMask | LeaveWindowMask |
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PropertyChangeMask);
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#ifdef USE_XINPUT
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_clutter_x11_select_events (stage_x11->xwin);
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#endif
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}
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else
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XSelectInput (backend_x11->xdpy, stage_x11->xwin,
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StructureNotifyMask |
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FocusChangeMask |
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ExposureMask |
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PointerMotionMask |
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KeyPressMask | KeyReleaseMask |
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ButtonPressMask | ButtonReleaseMask |
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EnterWindowMask | LeaveWindowMask |
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PropertyChangeMask);
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}
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/* no user resize... */
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clutter_stage_x11_fix_window_size (stage_x11,
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stage_x11->xwin_width,
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stage_x11->xwin_height);
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clutter_stage_x11_set_wm_protocols (stage_x11);
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return clutter_stage_egl_parent_iface->realize (stage_window);
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}
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#else /* COGL_HAS_XLIB_SUPPORT */
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static void
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clutter_stage_egl_unrealize (ClutterStageWindow *stage_window)
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{
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}
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static gboolean
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clutter_stage_egl_realize (ClutterStageWindow *stage_window)
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{
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/* the EGL surface is created by the backend */
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return TRUE;
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}
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static void
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clutter_stage_egl_set_fullscreen (ClutterStageWindow *stage_window,
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gboolean fullscreen)
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{
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g_warning ("Stage of type '%s' do not support ClutterStage::set_fullscreen",
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G_OBJECT_TYPE_NAME (stage_window));
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}
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static void
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clutter_stage_egl_set_title (ClutterStageWindow *stage_window,
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const gchar *title)
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{
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g_warning ("Stage of type '%s' do not support ClutterStage::set_title",
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G_OBJECT_TYPE_NAME (stage_window));
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}
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static void
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clutter_stage_egl_set_cursor_visible (ClutterStageWindow *stage_window,
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gboolean cursor_visible)
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{
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g_warning ("Stage of type '%s' do not support ClutterStage::set_cursor_visible",
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G_OBJECT_TYPE_NAME (stage_window));
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}
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static ClutterActor *
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clutter_stage_egl_get_wrapper (ClutterStageWindow *stage_window)
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{
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return CLUTTER_ACTOR (CLUTTER_STAGE_EGL (stage_window)->wrapper);
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}
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static void
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clutter_stage_egl_show (ClutterStageWindow *stage_window,
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gboolean do_raise)
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{
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ClutterStageEGL *stage_egl = CLUTTER_STAGE_EGL (stage_window);
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clutter_actor_map (CLUTTER_ACTOR (stage_egl->wrapper));
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}
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static void
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clutter_stage_egl_hide (ClutterStageWindow *stage_window)
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{
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ClutterStageEGL *stage_egl = CLUTTER_STAGE_EGL (stage_window);
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clutter_actor_unmap (CLUTTER_ACTOR (stage_egl->wrapper));
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}
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static void
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clutter_stage_egl_get_geometry (ClutterStageWindow *stage_window,
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ClutterGeometry *geometry)
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{
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ClutterStageEGL *stage_egl = CLUTTER_STAGE_EGL (stage_window);
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ClutterBackendEGL *backend_egl = stage_egl->backend;
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if (geometry)
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{
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geometry->x = geometry->y = 0;
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geometry->width = backend_egl->surface_width;
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geometry->height = backend_egl->surface_height;
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}
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}
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static void
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clutter_stage_egl_resize (ClutterStageWindow *stage_window,
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gint width,
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gint height)
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{
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}
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#endif /* COGL_HAS_XLIB_SUPPORT */
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static gboolean
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clutter_stage_egl_has_redraw_clips (ClutterStageWindow *stage_window)
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{
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ClutterStageEGL *stage_egl = CLUTTER_STAGE_EGL (stage_window);
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/* NB: at the start of each new frame there is an implied clip that
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* clips everything (i.e. nothing would be drawn) so we need to make
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* sure we return True in the un-initialized case here.
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*
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* NB: a clip width of 0 means a full stage redraw has been queued
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* so we effectively don't have any redraw clips in that case.
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*/
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if (!stage_egl->initialized_redraw_clip ||
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(stage_egl->initialized_redraw_clip &&
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stage_egl->bounding_redraw_clip.width != 0))
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return TRUE;
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else
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return FALSE;
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}
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static gboolean
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clutter_stage_egl_ignoring_redraw_clips (ClutterStageWindow *stage_window)
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{
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ClutterStageEGL *stage_egl = CLUTTER_STAGE_EGL (stage_window);
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/* NB: a clip width of 0 means a full stage redraw is required */
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if (stage_egl->initialized_redraw_clip &&
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stage_egl->bounding_redraw_clip.width == 0)
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return TRUE;
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else
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return FALSE;
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}
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/* A redraw clip represents (in stage coordinates) the bounding box of
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* something that needs to be redraw. Typically they are added to the
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* StageWindow as a result of clutter_actor_queue_clipped_redraw() by
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* actors such as ClutterEGLTexturePixmap. All redraw clips are
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* discarded after the next paint.
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*
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* A NULL stage_clip means the whole stage needs to be redrawn.
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*
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* What we do with this information:
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* - we keep track of the bounding box for all redraw clips
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* - when we come to redraw; we scissor the redraw to that box and use
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* glBlitFramebuffer to present the redraw to the front
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* buffer.
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*/
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static void
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clutter_stage_egl_add_redraw_clip (ClutterStageWindow *stage_window,
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ClutterGeometry *stage_clip)
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{
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ClutterStageEGL *stage_egl = CLUTTER_STAGE_EGL (stage_window);
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/* If we are already forced to do a full stage redraw then bail early */
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if (clutter_stage_egl_ignoring_redraw_clips (stage_window))
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return;
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/* A NULL stage clip means a full stage redraw has been queued and
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* we keep track of this by setting a zero width
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* stage_egl->bounding_redraw_clip */
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if (stage_clip == NULL)
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{
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stage_egl->bounding_redraw_clip.width = 0;
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stage_egl->initialized_redraw_clip = TRUE;
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return;
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}
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/* Ignore requests to add degenerate/empty clip rectangles */
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if (stage_clip->width == 0 || stage_clip->height == 0)
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return;
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if (!stage_egl->initialized_redraw_clip)
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{
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stage_egl->bounding_redraw_clip.x = stage_clip->x;
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stage_egl->bounding_redraw_clip.y = stage_clip->y;
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stage_egl->bounding_redraw_clip.width = stage_clip->width;
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stage_egl->bounding_redraw_clip.height = stage_clip->height;
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}
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else if (stage_egl->bounding_redraw_clip.width > 0)
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{
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clutter_geometry_union (&stage_egl->bounding_redraw_clip, stage_clip,
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&stage_egl->bounding_redraw_clip);
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}
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stage_egl->initialized_redraw_clip = TRUE;
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}
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static void
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clutter_stage_window_iface_init (ClutterStageWindowIface *iface)
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{
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#ifdef COGL_HAS_X11_SUPPORT
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clutter_stage_egl_parent_iface = g_type_interface_peek_parent (iface);
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iface->realize = clutter_stage_egl_realize;
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iface->unrealize = clutter_stage_egl_unrealize;
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/* the rest is inherited from ClutterStageX11 */
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#else /* COGL_HAS_X11_SUPPORT */
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iface->realize = clutter_stage_egl_realize;
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iface->unrealize = clutter_stage_egl_unrealize;
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iface->set_fullscreen = clutter_stage_egl_set_fullscreen;
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iface->set_title = clutter_stage_egl_set_title;
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iface->set_cursor_visible = clutter_stage_egl_set_cursor_visible;
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iface->get_wrapper = clutter_stage_egl_get_wrapper;
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iface->get_geometry = clutter_stage_egl_get_geometry;
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iface->resize = clutter_stage_egl_resize;
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iface->show = clutter_stage_egl_show;
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iface->hide = clutter_stage_egl_hide;
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#endif /* COGL_HAS_X11_SUPPORT */
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iface->add_redraw_clip = clutter_stage_egl_add_redraw_clip;
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iface->has_redraw_clips = clutter_stage_egl_has_redraw_clips;
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iface->ignoring_redraw_clips = clutter_stage_egl_ignoring_redraw_clips;
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}
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#ifdef COGL_HAS_X11_SUPPORT
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static void
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clutter_stage_egl_dispose (GObject *gobject)
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{
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G_OBJECT_CLASS (_clutter_stage_egl_parent_class)->dispose (gobject);
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}
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static void
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_clutter_stage_egl_class_init (ClutterStageEGLClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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gobject_class->dispose = clutter_stage_egl_dispose;
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}
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static void
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_clutter_stage_egl_init (ClutterStageEGL *stage)
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{
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stage->egl_surface = EGL_NO_SURFACE;
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}
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#else /* COGL_HAS_X11_SUPPORT */
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static void
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_clutter_stage_egl_class_init (ClutterStageEGLClass *klass)
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{
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}
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static void
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_clutter_stage_egl_init (ClutterStageEGL *stage)
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{
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/* Without X we only support one surface and that is associated
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* with the backend directly instead of the stage */
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}
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#endif /* COGL_HAS_X11_SUPPORT */
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void
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_clutter_stage_egl_redraw (ClutterStageEGL *stage_egl,
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ClutterStage *stage)
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{
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ClutterBackend *backend = clutter_get_default_backend ();
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ClutterBackendEGL *backend_egl = CLUTTER_BACKEND_EGL (backend);
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ClutterActor *wrapper;
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EGLSurface egl_surface;
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gboolean may_use_clipped_redraw;
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gboolean use_clipped_redraw;
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#ifdef COGL_HAS_X11_SUPPORT
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ClutterStageX11 *stage_x11 = CLUTTER_STAGE_X11 (stage_egl);
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wrapper = CLUTTER_ACTOR (stage_x11->wrapper);
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egl_surface = stage_egl->egl_surface;
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#else
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wrapper = CLUTTER_ACTOR (stage_egl->wrapper);
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/* Without X we only support one surface and that is associated
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* with the backend directly instead of the stage */
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egl_surface = backend_egl->egl_surface;
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#endif
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if (G_LIKELY (backend_egl->can_blit_sub_buffer) &&
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/* NB: a zero width clip == full stage redraw */
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stage_egl->bounding_redraw_clip.width != 0 &&
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/* some drivers struggle to get going and produce some junk
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* frames when starting up... */
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G_LIKELY (stage_egl->frame_count > 3)
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#ifdef COGL_HAS_X11_SUPPORT
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/* While resizing a window clipped redraws are disabled to avoid
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* artefacts. See clutter-event-x11.c:event_translate for a
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* detailed explanation */
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&& G_LIKELY (stage_x11->clipped_redraws_cool_off == 0)
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#endif
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)
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may_use_clipped_redraw = TRUE;
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else
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may_use_clipped_redraw = FALSE;
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if (may_use_clipped_redraw &&
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G_LIKELY (!(clutter_paint_debug_flags &
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CLUTTER_DEBUG_DISABLE_CLIPPED_REDRAWS)))
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use_clipped_redraw = TRUE;
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else
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use_clipped_redraw = FALSE;
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if (use_clipped_redraw)
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{
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cogl_clip_push_window_rectangle (stage_egl->bounding_redraw_clip.x,
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stage_egl->bounding_redraw_clip.y,
|
|
stage_egl->bounding_redraw_clip.width,
|
|
stage_egl->bounding_redraw_clip.height);
|
|
_clutter_stage_do_paint (stage, &stage_egl->bounding_redraw_clip);
|
|
cogl_clip_pop ();
|
|
}
|
|
else
|
|
_clutter_stage_do_paint (stage, NULL);
|
|
|
|
if (clutter_paint_debug_flags & CLUTTER_DEBUG_REDRAWS &&
|
|
may_use_clipped_redraw)
|
|
{
|
|
ClutterGeometry *clip = &stage_egl->bounding_redraw_clip;
|
|
static CoglMaterial *outline = NULL;
|
|
CoglHandle vbo;
|
|
float x_1 = clip->x;
|
|
float x_2 = clip->x + clip->width;
|
|
float y_1 = clip->y;
|
|
float y_2 = clip->y + clip->height;
|
|
float quad[8] = {
|
|
x_1, y_1,
|
|
x_2, y_1,
|
|
x_2, y_2,
|
|
x_1, y_2
|
|
};
|
|
CoglMatrix modelview;
|
|
|
|
if (outline == NULL)
|
|
{
|
|
outline = cogl_material_new ();
|
|
cogl_material_set_color4ub (outline, 0xff, 0x00, 0x00, 0xff);
|
|
}
|
|
|
|
vbo = cogl_vertex_buffer_new (4);
|
|
cogl_vertex_buffer_add (vbo,
|
|
"gl_Vertex",
|
|
2, /* n_components */
|
|
COGL_ATTRIBUTE_TYPE_FLOAT,
|
|
FALSE, /* normalized */
|
|
0, /* stride */
|
|
quad);
|
|
cogl_vertex_buffer_submit (vbo);
|
|
|
|
cogl_push_matrix ();
|
|
cogl_matrix_init_identity (&modelview);
|
|
_clutter_actor_apply_modelview_transform (CLUTTER_ACTOR (stage),
|
|
&modelview);
|
|
cogl_set_modelview_matrix (&modelview);
|
|
cogl_set_source (outline);
|
|
cogl_vertex_buffer_draw (vbo, COGL_VERTICES_MODE_LINE_LOOP,
|
|
0 , 4);
|
|
cogl_pop_matrix ();
|
|
cogl_object_unref (vbo);
|
|
}
|
|
|
|
cogl_flush ();
|
|
|
|
/* push on the screen */
|
|
if (use_clipped_redraw)
|
|
{
|
|
ClutterGeometry *clip = &stage_egl->bounding_redraw_clip;
|
|
ClutterGeometry copy_area;
|
|
|
|
CLUTTER_NOTE (BACKEND,
|
|
"_egl_blit_sub_buffer (surface: %p, "
|
|
"x: %d, y: %d, "
|
|
"width: %d, height: %d)",
|
|
egl_surface,
|
|
stage_egl->bounding_redraw_clip.x,
|
|
stage_egl->bounding_redraw_clip.y,
|
|
stage_egl->bounding_redraw_clip.width,
|
|
stage_egl->bounding_redraw_clip.height);
|
|
|
|
copy_area.x = clip->x;
|
|
copy_area.y = clip->y;
|
|
copy_area.width = clip->width;
|
|
copy_area.height = clip->height;
|
|
|
|
CLUTTER_TIMER_START (_clutter_uprof_context, blit_sub_buffer_timer);
|
|
_clutter_backend_egl_blit_sub_buffer (backend_egl,
|
|
egl_surface,
|
|
copy_area.x,
|
|
copy_area.y,
|
|
copy_area.width,
|
|
copy_area.height);
|
|
CLUTTER_TIMER_STOP (_clutter_uprof_context, blit_sub_buffer_timer);
|
|
}
|
|
else
|
|
{
|
|
CLUTTER_NOTE (BACKEND, "eglwapBuffers (display: %p, surface: %p)",
|
|
backend_egl->edpy,
|
|
egl_surface);
|
|
|
|
CLUTTER_TIMER_START (_clutter_uprof_context, swapbuffers_timer);
|
|
eglSwapBuffers (backend_egl->edpy, egl_surface);
|
|
CLUTTER_TIMER_STOP (_clutter_uprof_context, swapbuffers_timer);
|
|
_cogl_swap_buffers_notify ();
|
|
}
|
|
|
|
/* reset the redraw clipping for the next paint... */
|
|
stage_egl->initialized_redraw_clip = FALSE;
|
|
|
|
stage_egl->frame_count++;
|
|
}
|