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authorBrian Paul <brian.paul@tungstengraphics.com>2001-05-10 14:21:17 +0000
committerBrian Paul <brian.paul@tungstengraphics.com>2001-05-10 14:21:17 +0000
commite296d7f0e455ebb1776d01196020a3b4ce2507fb (patch)
treeb827432b8ad5ea7c0f557a0288e203f1e7186a0e
parentad51be1ad4c60ad678405a860735901ef1e6ce94 (diff)
applied Jeff & Keith's optimization to write_span_mono_pixmap()
-rw-r--r--src/mesa/drivers/x11/xm_span.c23
1 files changed, 22 insertions, 1 deletions
diff --git a/src/mesa/drivers/x11/xm_span.c b/src/mesa/drivers/x11/xm_span.c
index 0991a44f7e..404bd9e02b 100644
--- a/src/mesa/drivers/x11/xm_span.c
+++ b/src/mesa/drivers/x11/xm_span.c
@@ -1,4 +1,4 @@
-/* $Id: xm_span.c,v 1.11 2001/03/19 02:25:36 keithw Exp $ */
+/* $Id: xm_span.c,v 1.12 2001/05/10 14:21:17 brianp Exp $ */
/*
* Mesa 3-D graphics library
@@ -2562,11 +2562,32 @@ static void write_span_mono_pixmap( MONO_SPAN_ARGS )
XMesaFillRectangle( dpy, buffer, gc, (int) x, (int) y, n, 1 );
}
else {
+#if 0
for (i=0;i<n;i++,x++) {
if (mask[i]) {
XMesaDrawPoint( dpy, buffer, gc, (int) x, (int) y );
}
}
+#else
+ /* This version is usually faster. Contributed by Jeff Epler
+ * and cleaned up by Keith Whitwell.
+ */
+ for (i = 0; i < n; ) {
+ GLuint start = i;
+ /* Identify and emit contiguous rendered pixels
+ */
+ for( ; i < n && mask[i]; i++)
+ /* Nothing */;
+ if (start < i)
+ XMesaFillRectangle( dpy, buffer, gc,
+ (int)(x+start), (int) y,
+ (int)(i-start), 1);
+ /* Eat up non-rendered pixels
+ */
+ for(; i < n && !mask[i]; i++)
+ /* Nothing */;
+ }
+#endif
}
}