Revision: 56489
http://sourceforge.net/p/brlcad/code/56489
Author: mohitdaga
Date: 2013-08-02 18:29:39 +0000 (Fri, 02 Aug 2013)
Log Message:
-----------
Improve BOX Average in shrink function.
Modified Paths:
--------------
brlcad/trunk/src/util/bwshrink.c
Modified: brlcad/trunk/src/util/bwshrink.c
===================================================================
--- brlcad/trunk/src/util/bwshrink.c 2013-08-02 18:13:58 UTC (rev 56488)
+++ brlcad/trunk/src/util/bwshrink.c 2013-08-02 18:29:39 UTC (rev 56489)
@@ -46,7 +46,7 @@
void
shrink_image(int w, int h, unsigned char *buffer, int Factor)
{
- unsigned char *finalpixel; /* output pixel pointer */
+ unsigned char *finalpixel, *pixelp; /* output pixel pointer */
unsigned int p; /* pixel sum/average */
int facsq, x, y, px, py;
@@ -57,13 +57,13 @@
for (x=0; x < w; x += Factor) {
/* average factor by factor grid of pixels */
-
p = 0;
for (py = 0; py < Factor; py++) {
+ pixelp = &buffer[(y+py)*w+x];
/* add pixels from scanline to average */
for (px = 0; px < Factor; px++) {
- p += buffer[y*w + x+px];
+ p += *pixelp++;
}
}
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