Branch: refs/heads/Cog Home: https://github.com/OpenSmalltalk/opensmalltalk-vm Commit: 561d57da08901d946bda86a5660be16e7c441841 https://github.com/OpenSmalltalk/opensmalltalk-vm/commit/561d57da08901d946bd... Author: Nicolas Cellier nicolas.cellier@sirehna.com Date: 2022-08-25 (Thu, 25 Aug 2022)

Changed paths: M src/plugins/BitBltPlugin/BitBltPlugin.c

Log Message: ----------- Fix issue 651 with VMMaker.oscog-nice.3251

The rgbMul BitBlt operation now work in 1-bit deep forms, and is correctly rounded for any other depth.

Note that the rgbMul might be used for pre-multiplying color channels in some anti-aliasing algorithms.<br> It's been used in Cuis for font rendering see this thread:

http://forum.world.st/BitBlt-looking-for-rule-blitting-an-alpha-mask-constan...

http://lists.squeakfoundation.org/pipermail/vm-dev/2009-June/002760.html