Wire SKSL based stretch shader to HWUI

--Ported SKSL based stretch shader from OpenGL prototype
--Hooked up the stretch APIs in RenderNode to the stretch
shader.
--Updated RenderNode layer logic to promote the RenderNode to
a layer if there is a stretch to be applied to it in order
to feed the layer as input to the stretch shader

Bug: 179047472
Test: builds + sample overscroll stretches + updated CTS test
Change-Id: I744ff70099fe251ce07f23d067bf13444a468c08

1 files changed, 20 insertions, 0 deletions

diff --git a/core/java/android/widget/ScrollView.java b/core/java/android/widget/ScrollView.java
index 65f3da79afe0..30067296f967 100644
--- a/core/java/android/widget/ScrollView.java
+++ b/core/java/android/widget/ScrollView.java
@@ -281,6 +281,26 @@ public class ScrollView extends FrameLayout {
     }
 
     /**
+     * API used for prototyping stretch effect parameters in framework sample apps
+     * @hide
+     */
+    public void setEdgeEffectIntensity(float intensity) {
+        mEdgeGlowTop.setMaxStretchIntensity(intensity);
+        mEdgeGlowBottom.setMaxStretchIntensity(intensity);
+        invalidate();
+    }
+
+    /**
+     * API used for prototyping stretch effect parameters in the framework sample apps
+     * @hide
+     */
+    public void setStretchDistance(float distance) {
+        mEdgeGlowTop.setStretchDistance(distance);
+        mEdgeGlowBottom.setStretchDistance(distance);
+        invalidate();
+    }
+
+    /**
      * Sets the bottom edge effect color.
      *
      * @param color The color for the bottom edge effect.