Correct PorterDuff filters.

1. Remove unused modes - makes the class more manageable, and missing
modes can always be readded from the git history.
2. Reuse the existing BlendComposite instances where possible.
3. Fix incorrect alpha computation for multiply mode.
4. Change the alpha computation for all blend modes to compenstate for
the fact that the color filter image that we create extends beyond the
image it is inteded to be applied to.

Change-Id: Iedebf289a23325ee4c6d406dcad46a9edb1855c7

1 files changed, 1 insertions, 1 deletions

diff --git a/tools/layoutlib/bridge/src/android/graphics/PorterDuffColorFilter_Delegate.java b/tools/layoutlib/bridge/src/android/graphics/PorterDuffColorFilter_Delegate.java
index 4ac376c..1ca94dc 100644
--- a/tools/layoutlib/bridge/src/android/graphics/PorterDuffColorFilter_Delegate.java
+++ b/tools/layoutlib/bridge/src/android/graphics/PorterDuffColorFilter_Delegate.java
@@ -103,7 +103,7 @@ public class PorterDuffColorFilter_Delegate extends ColorFilter_Delegate {
     // For filtering the colors, the src image should contain the "color" only for pixel values
     // which are not transparent in the target image. But, we are using a simple rectangular image
     // completely filled with color. Hence some Composite rules do not apply as intended. However,
-    // in such cases, they can usually be mapped to some other mode, which produces an
+    // in such cases, they can usually be mapped to some other mode, which produces an approximately
     // equivalent result.
     private Mode getCompatibleMode(Mode mode) {
         Mode m = mode;