summaryrefslogtreecommitdiffstats
path: root/generic
diff options
context:
space:
mode:
authordkf <donal.k.fellows@manchester.ac.uk>2009-09-25 08:46:07 (GMT)
committerdkf <donal.k.fellows@manchester.ac.uk>2009-09-25 08:46:07 (GMT)
commit15cfea56bc85d5b5b7a44fbc46f54e8c9d32b959 (patch)
tree2967de3fd96b6abd4210437a0f1e7520e936946b /generic
parentedff204f863b5527369a1ca046d40240fe45754d (diff)
downloadtk-15cfea56bc85d5b5b7a44fbc46f54e8c9d32b959.zip
tk-15cfea56bc85d5b5b7a44fbc46f54e8c9d32b959.tar.gz
tk-15cfea56bc85d5b5b7a44fbc46f54e8c9d32b959.tar.bz2
Correct generation of grayscale data from an image. Reported by Keith Vetter
on comp.lang.tcl.
Diffstat (limited to 'generic')
-rw-r--r--generic/tkImgPhoto.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/generic/tkImgPhoto.c b/generic/tkImgPhoto.c
index 545e768..f133de2 100644
--- a/generic/tkImgPhoto.c
+++ b/generic/tkImgPhoto.c
@@ -17,7 +17,7 @@
* Department of Computer Science,
* Australian National University.
*
- * RCS: @(#) $Id: tkImgPhoto.c,v 1.91 2009/01/19 14:00:06 das Exp $
+ * RCS: @(#) $Id: tkImgPhoto.c,v 1.92 2009/09/25 08:46:07 dkf Exp $
*/
#include "tkImgPhoto.h"
@@ -3587,8 +3587,8 @@ ImgGetPhoto(
} else if (optPtr->options & OPT_GRAYSCALE) {
for (y = blockPtr->height; y > 0; y--) {
for (x = blockPtr->width; x > 0; x--) {
- *destPtr = (unsigned char)
- (srcPtr[0]*11+srcPtr[1]*16+srcPtr[2]*5 + 16) >> 5;
+ *destPtr = (unsigned char) ((srcPtr[0]*11 + srcPtr[1]*16
+ + srcPtr[2]*5 + 16) >> 5);
srcPtr += blockPtr->pixelSize;
destPtr += newPixelSize;
}