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| author | dkf <donal.k.fellows@manchester.ac.uk> | 2004-12-09 10:05:37 (GMT) |
|---|---|---|
| committer | dkf <donal.k.fellows@manchester.ac.uk> | 2004-12-09 10:05:37 (GMT) |
| commit | df22aaf69eaaaf896c7520ee40bcfaf2f6209101 (patch) | |
| tree | cef9444ddc60045b183dd8553137f48c68a841d1 | |
| parent | f842b0ddfdbd3c96c8bc82fdac2b74c59ce68574 (diff) | |
| download | tk-df22aaf69eaaaf896c7520ee40bcfaf2f6209101.zip tk-df22aaf69eaaaf896c7520ee40bcfaf2f6209101.tar.gz tk-df22aaf69eaaaf896c7520ee40bcfaf2f6209101.tar.bz2 | |
Speed up use of Tk_PhotoPutBlock by allowing it to skip the complex-alpha check
in degenerate (and common) cases. [Bug 1081966]
| -rw-r--r-- | ChangeLog | 8 | ||||
| -rw-r--r-- | generic/tkImgPhoto.c | 10 |
2 files changed, 15 insertions, 3 deletions
@@ -1,3 +1,11 @@ +2004-12-09 Donal K. Fellows <donal.k.fellows@man.ac.uk> + + * generic/tkImgPhoto.c (Tk_PhotoPutBlock, Tk_PhotoPutZoomedBlock): + Added guards so that rescanning for the complex-alpha check is not + done in the common case of creating a simple image a bit at a + time, or any other time where the image was simple before and the + input data has no alpha channel. [Bug 1081966] + 2004-12-06 Jeff Hobbs <jeffh@ActiveState.com> *** 8.4.9 TAGGED FOR RELEASE *** diff --git a/generic/tkImgPhoto.c b/generic/tkImgPhoto.c index 05b0e57..9daf790 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 1.36.2.12 2004/12/03 13:16:35 dkf Exp $ + * RCS: @(#) $Id: tkImgPhoto.c,v 1.36.2.13 2004/12/09 10:05:38 dkf Exp $ */ #include "tkInt.h" @@ -4586,7 +4586,9 @@ Tk_PhotoPutBlock(handle, blockPtr, x, y, width, height, compRule) * Check if display code needs alpha blending... */ - ToggleComplexAlphaIfNeeded(masterPtr); + if (alphaOffset != 0 || masterPtr->flags & COMPLEX_ALPHA) { + ToggleComplexAlphaIfNeeded(masterPtr); + } /* * Update each instance. @@ -4878,7 +4880,9 @@ Tk_PhotoPutZoomedBlock(handle, blockPtr, x, y, width, height, zoomX, zoomY, * Check if display code needs alpha blending... */ - ToggleComplexAlphaIfNeeded(masterPtr); + if (alphaOffset != 0 || masterPtr->flags & COMPLEX_ALPHA) { + ToggleComplexAlphaIfNeeded(masterPtr); + } /* * Update each instance. |