diff options
Diffstat (limited to 'generic/tkImgPhoto.c')
| -rw-r--r-- | generic/tkImgPhoto.c | 25 |
1 files changed, 15 insertions, 10 deletions
diff --git a/generic/tkImgPhoto.c b/generic/tkImgPhoto.c index 1513607..4722095 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 1.88 2008/11/18 23:49:43 nijtmans Exp $ + * RCS: @(#) $Id: tkImgPhoto.c,v 1.89 2009/01/06 09:22:30 dkf Exp $ */ #include "tkImgPhoto.h" @@ -2849,21 +2849,26 @@ Tk_PhotoPutBlock( * Check if display code needs alpha blending... */ - if (!sourceIsSimplePhoto && (width == 1) && (height == 1)) { + if (!sourceIsSimplePhoto && (height == 1)) { /* - * Optimize the single pixel case if we can. This speeds up code that - * builds up large simple-alpha images by single pixels. We don't - * negate COMPLEX_ALPHA in this case. [Bug 1409140] + * Optimize the single span case if we can. This speeds up code that + * builds up large simple-alpha images by scan-lines or individual + * pixels. We don't negate COMPLEX_ALPHA in this case. [Bug 1409140] + * [Patch 1539990] */ if (!(masterPtr->flags & COMPLEX_ALPHA)) { - unsigned char newAlpha; + register unsigned int x1; - destLinePtr = masterPtr->pix32 + (y * masterPtr->width + x) * 4; - newAlpha = destLinePtr[3]; + for (x1=x ; x<x+width ; x1++) { + register unsigned char newAlpha; - if (newAlpha && newAlpha != 255) { - masterPtr->flags |= COMPLEX_ALPHA; + destLinePtr = masterPtr->pix32 + (y*masterPtr->width + x1)*4; + newAlpha = destLinePtr[3]; + if (newAlpha && newAlpha != 255) { + masterPtr->flags |= COMPLEX_ALPHA; + break; + } } } } else if ((alphaOffset != 0) || (masterPtr->flags & COMPLEX_ALPHA)) { |