commit d15ebf25c595b855f6978d0600218e3ea5f31e92
author Chet Haase <chet@google.com> Wed Sep 05 11:40:29 2012 -0700
committer Chet Haase <chet@google.com> Fri Sep 07 13:27:02 2012 -0700
tree 35154bd1ec18cf8299a0d737847291ab28a5c98b
parent 4db5d23deab9ea8de34cdb1c56af31e6e3cff79b

Enable changing properties of layer paint

Previously, to draw a layered view with a changed Paint object for the
drawLayer operation, you'd have to invalidate the parent view, to get the
native DisplayList to pick up the new Paint properties. This change adds
API and functionality so that the developer can call setLayerPaint(), which
does the proper invalidation (lightweight, doesn't cause redrawing the view).

Issue #6923810 Make it easy to efficiently animate a layer's Paint

Change-Id: I7fea79788d50f6d9c86dd5e5b2a4490cb95142bb

libs/hwui/OpenGLRenderer.cpp

diff --git a/libs/hwui/OpenGLRenderer.cpp b/libs/hwui/OpenGLRenderer.cpp
index b66c898..05c7809 100644
--- a/libs/hwui/OpenGLRenderer.cpp
+++ b/libs/hwui/OpenGLRenderer.cpp
@@ -2593,17 +2593,13 @@
 
     mCaches.activeTexture(0);
 
-    int alpha;
-    SkXfermode::Mode mode;
-    getAlphaAndMode(paint, &alpha, &mode);
-
-    layer->setAlpha(alpha, mode);
-
     if (CC_LIKELY(!layer->region.isEmpty())) {
         if (layer->region.isRect()) {
             composeLayerRect(layer, layer->regionRect);
         } else if (layer->mesh) {
-            const float a = alpha / 255.0f;
+            const float a = layer->getAlpha() / 255.0f;
+            SkiaColorFilter *oldFilter = mColorFilter;
+            mColorFilter = layer->getColorFilter();
 
             setupDraw();
             setupDrawWithTexture();
@@ -2633,6 +2629,8 @@
 
             finishDrawTexture();
 
+            mColorFilter = oldFilter;
+
 #if DEBUG_LAYERS_AS_REGIONS
             drawRegionRects(layer->region);
 #endif