add ADD xfermode
authorreed@android.com <reed@android.com@2bbb7eff-a529-9590-31e7-b0007b416f81>
Fri, 24 Apr 2009 12:43:40 +0000 (12:43 +0000)
committerreed@android.com <reed@android.com@2bbb7eff-a529-9590-31e7-b0007b416f81>
Fri, 24 Apr 2009 12:43:40 +0000 (12:43 +0000)
commit543ed9352c7dfd93071c08b14930cca2e82a08d4
treeefc09f0a3a5c18d617cd98bc359345c283b74fbf
parentb2f92f07d7b6d17b30ce5e89393ce2016a35abc4
add ADD xfermode
safely handle (don't draw) if the size of SkMask exceeds 31bits

git-svn-id: http://skia.googlecode.com/svn/trunk@159 2bbb7eff-a529-9590-31e7-b0007b416f81
include/core/SkMask.h
include/core/SkPorterDuff.h
src/core/SkDraw.cpp
src/core/SkMask.cpp
src/core/SkXfermode.cpp
src/effects/SkBlurMask.cpp
src/effects/SkEmbossMaskFilter.cpp
src/effects/SkKernel33MaskFilter.cpp
src/effects/SkLayerRasterizer.cpp