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| author | dkf <donal.k.fellows@manchester.ac.uk> | 2009-09-25 08:46:07 (GMT) |
|---|---|---|
| committer | dkf <donal.k.fellows@manchester.ac.uk> | 2009-09-25 08:46:07 (GMT) |
| commit | 15cfea56bc85d5b5b7a44fbc46f54e8c9d32b959 (patch) | |
| tree | 2967de3fd96b6abd4210437a0f1e7520e936946b /generic/tkImgPhoto.c | |
| parent | edff204f863b5527369a1ca046d40240fe45754d (diff) | |
| download | tk-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/tkImgPhoto.c')
| -rw-r--r-- | generic/tkImgPhoto.c | 6 |
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; } |