2.5: WM Compositing

* Triple Buffer is now more complete:
  - Proper handling of window resize, duplicate, etc.
  - It now uses 3x3 textures (or less) if the power of two sizes
    do not match well. That still has a worst case wast of 23.4%,
    but better than 300%.
  - It can also use the ARB/NV/EXT_texture_rectangle extension
    now, which may be supported on hardware that does not support
    ARB_texture_non_power_of_two.
  - Gesture, menu and brushe redraws now require no redraws at all
    from the area regions. So even on a high poly scene just moving
    the paint cursor or opening a menu should be fast.

* Testing can be done by setting the "Window Draw Method" in the
  User Preferences in the outliner. "Overlap" is still default,
  since "Triple Buffer" has not been tested on computers other than
  mine, would like to avoid crashing Blender on startup in case
  there is a common bug, but it's ready for testing now.

  - For reference "Full" draws the full window each time.
  - "Triple Buffer" should work for both swap copy and swap exchange
    systems, the latter still need the -E command line option for
    "Overlap".
  - Resizing and going fullscreen still gives flicker here but no
    more than "Full" drawing.

* Partial Redraw was added. ED_region_tag_redraw_partial takes a
  rect in window coordinates to define a subarea of the region.
  On region draw it will then set glScissor to a smaller area, and
  ar->drawrct will always be set to either the partial or full
  window rect. The latter can then be used for clipping in the 3D
  view or clipping interface drawing. Neither is implemented yet.

1 files changed, 42 insertions, 0 deletions

diff --git a/source/blender/windowmanager/wm_draw.h b/source/blender/windowmanager/wm_draw.h
new file mode 100644
index 00000000000..4b462b1b5e8
--- /dev/null
+++ b/source/blender/windowmanager/wm_draw.h
@@ -0,0 +1,42 @@
+/**
+ * $Id:
+ *
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version. 
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * The Original Code is Copyright (C) 2007 Blender Foundation.
+ * All rights reserved.
+ *
+ * 
+ * Contributor(s): Blender Foundation
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#ifndef WM_DRAW_H
+#define WM_DRAW_H
+
+struct bContext;
+struct wmWindow;
+struct ARegion;
+
+/* wm_draw.c */
+void		wm_draw_update			(struct bContext *C);
+void		wm_draw_window_clear	(struct wmWindow *win);
+void		wm_draw_region_clear	(struct wmWindow *win, struct ARegion *ar);
+
+#endif /* WM_DRAW_H */
+