CVSROOT: /cvsroot/gnash
Module name: gnash
Branch: release_0_7_2
Changes by: Udo Giacomozzi <udog> 06/11/04 12:24:36
Modified files:
. : ChangeLog
backend : render_handler_agg.cpp
Log message:
optimized screen clearing
CVSWeb URLs:
http://cvs.savannah.gnu.org/viewcvs/gnash/ChangeLog?cvsroot=gnash&only_with_tag=release_0_7_2&r1=1.1412.2.72&r2=1.1412.2.73
http://cvs.savannah.gnu.org/viewcvs/gnash/backend/render_handler_agg.cpp?cvsroot=gnash&only_with_tag=release_0_7_2&r1=1.29.2.11&r2=1.29.2.12
Patches:
Index: ChangeLog
===================================================================
RCS file: /cvsroot/gnash/gnash/ChangeLog,v
retrieving revision 1.1412.2.72
retrieving revision 1.1412.2.73
diff -u -b -r1.1412.2.72 -r1.1412.2.73
--- ChangeLog 4 Nov 2006 10:52:44 -0000 1.1412.2.72
+++ ChangeLog 4 Nov 2006 12:24:35 -0000 1.1412.2.73
@@ -1,7 +1,7 @@
2006-11-04 Udo Giacomozzi <[EMAIL PROTECTED]>
* backend/render_handler_agg.cpp: removed compatibility include as
- it is not enough anyway
+ it is not enough anyway; optimized screen clearing
2006-11-04 Markus Gothe <[EMAIL PROTECTED]>
Index: backend/render_handler_agg.cpp
===================================================================
RCS file: /cvsroot/gnash/gnash/backend/render_handler_agg.cpp,v
retrieving revision 1.29.2.11
retrieving revision 1.29.2.12
diff -u -b -r1.29.2.11 -r1.29.2.12
--- backend/render_handler_agg.cpp 4 Nov 2006 10:52:44 -0000
1.29.2.11
+++ backend/render_handler_agg.cpp 4 Nov 2006 12:24:36 -0000
1.29.2.12
@@ -16,7 +16,7 @@
-/* $Id: render_handler_agg.cpp,v 1.29.2.11 2006/11/04 10:52:44 udog Exp $ */
+/* $Id: render_handler_agg.cpp,v 1.29.2.12 2006/11/04 12:24:36 udog Exp $ */
// Original version by Udo Giacomozzi and Hannes Mayr,
// INDUNET GmbH (www.indunet.it)
@@ -485,9 +485,9 @@
assert(m_pixf != NULL);
// clear the stage using the background color
- renderer_base rbase(*m_pixf);
- rbase.clip_box(m_clip_xmin, m_clip_ymin, m_clip_xmax, m_clip_ymax);
- rbase.clear(agg::rgba8(background_color.m_r, background_color.m_g,
+ clear_framebuffer(m_clip_xmin, m_clip_ymin,
+ m_clip_xmax-m_clip_xmin+1, m_clip_ymax-m_clip_ymin+1,
+ agg::rgba8(background_color.m_r, background_color.m_g,
background_color.m_b, background_color.m_a));
// calculate final pixel scale
@@ -500,6 +500,23 @@
m_drawing_mask = false;
}
+ /// renderer_base.clear() does no clipping which clears the whole
framebuffer
+ /// even if we update just a small portion of the screen. The result
would be
+ /// still correct, but slower.
+ /// This function clears only a certain portion of the screen, while /not/
+ /// being notably slower for a fullscreen clear.
+ void clear_framebuffer(unsigned int left, unsigned int top,
+ unsigned int width, unsigned int height, agg::rgba8 color) {
+
+ if (!width) return;
+
+ unsigned int y;
+ const unsigned int max_y = top+height; // to be exact, it's one off
the max.
+
+ for (y=top; y<max_y; y++)
+ m_pixf->copy_hline(left, y, width, color);
+ }
+
bool allow_glyph_textures() {
// We want to render all glyphs in place
return false;
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