Add coeffecients for kScreen xfermode.
Review URL: https://codereview.chromium.org/14046021
git-svn-id: http://skia.googlecode.com/svn/trunk@8680 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/core/SkXfermode.cpp b/src/core/SkXfermode.cpp
index d1a0f7a..a90fa66 100644
--- a/src/core/SkXfermode.cpp
+++ b/src/core/SkXfermode.cpp
@@ -653,7 +653,7 @@
{ plus_modeproc, SkXfermode::kOne_Coeff, SkXfermode::kOne_Coeff },
{ modulate_modeproc,SkXfermode::kZero_Coeff, SkXfermode::kSC_Coeff },
- { screen_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF },
+ { screen_modeproc, SkXfermode::kOne_Coeff, SkXfermode::kISC_Coeff },
{ overlay_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF },
{ darken_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF },
{ lighten_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF },