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| author | dkf <donal.k.fellows@manchester.ac.uk> | 2009-09-25 08:48:52 (GMT) |
|---|---|---|
| committer | dkf <donal.k.fellows@manchester.ac.uk> | 2009-09-25 08:48:52 (GMT) |
| commit | 14767d92e8525b24e10d6c5de874a5cf92a02cba (patch) | |
| tree | 5a95e83cfd6a065c9db0d329aed824abf767bd11 /generic/tkImgPhoto.c | |
| parent | 7ddd685d9afb4397ba47bb464c385ef27f3d31ed (diff) | |
| download | tk-14767d92e8525b24e10d6c5de874a5cf92a02cba.zip tk-14767d92e8525b24e10d6c5de874a5cf92a02cba.tar.gz tk-14767d92e8525b24e10d6c5de874a5cf92a02cba.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 9ffbb3d..6e385a4 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 1.76.2.3 2009/02/06 08:13:23 das Exp $ + * RCS: @(#) $Id: tkImgPhoto.c,v 1.76.2.4 2009/09/25 08:48:53 dkf Exp $ */ #include "tkInt.h" @@ -5681,8 +5681,8 @@ 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; } |