AuroraMiddleware/qt5base-lts
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Use the "copy" blend mode for backingstore drawing

Browse Source 
The default is a "source over", but we want to
completely replace the destination pixels. (Which
is slightly faster).

Change-Id: I4916765258a2236f70f58a8e20b06f80739183c1
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@digia.com>
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>
This commit is contained in:
Morten Johan Sorvig 2012-12-04 15:26:02 +01:00 committed by The Qt Project
parent 9650a5aa25
commit 2e14214357
1 changed files with 1 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
src/plugins/platforms/cocoa/qnsview.mm
View File

@ -316,6 +316,7 @@ static QTouchDevice *touchDevice = 0;
);
CGImageRef bsCGImage = m_backingStore->getBackingStoreCGImage();
CGImageRef cleanImg = CGImageCreateWithImageInRect(bsCGImage, backingStoreRect);
CGContextSetBlendMode(cgContext, kCGBlendModeCopy);
CGContextDrawImage(cgContext, dirtyWindowRect, cleanImg);
// Clean-up: