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authordkf <donal.k.fellows@manchester.ac.uk>2006-03-16 00:42:48 (GMT)
committerdkf <donal.k.fellows@manchester.ac.uk>2006-03-16 00:42:48 (GMT)
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Hack to make photo-to-photo copies cheaper in the common case of no alpha
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+2006-03-16 Donal K. Fellows <donal.k.fellows@man.ac.uk>
+
+ * generic/tkImgPhoto.c (ImgPhotoCmd, Tk_PhotoPutBlock)
+ (Tk_PhotoPutZoomedBlock): Added hack to detect copying of a photo with
+ a simple alpha channel and skip calling ToggleComplexAlphaIfNeeded.
+ This should speed up many photo-to-photo copies, keeping the cost of
+ the alpha channel down.
+
2006-03-15 Donal K. Fellows <donal.k.fellows@man.ac.uk>
* generic/tkImgPhoto.c (Tk_PhotoPutBlock, Tk_PhotoPutZoomedBlock): Try