Varying-based AA rect drawing

Instead of calculating opacity from relative position in the shader, use a
shader varying to do this computation for us.

bug:5045101

Also adds a test to HwAccelerationTest to show incorrect antialiasing in
scaled drawAARect / boundarySize calculation.

Change-Id: Icdc41acb01dc10ce354834f8389a5aed2f439162

1 files changed, 6 insertions, 0 deletions

diff --git a/tests/HwAccelerationTest/src/com/android/test/hwui/ColoredRectsActivity.java b/tests/HwAccelerationTest/src/com/android/test/hwui/ColoredRectsActivity.java
index e8cdbc3..7ea2a62 100644
--- a/tests/HwAccelerationTest/src/com/android/test/hwui/ColoredRectsActivity.java
+++ b/tests/HwAccelerationTest/src/com/android/test/hwui/ColoredRectsActivity.java
@@ -113,6 +113,12 @@ public class ColoredRectsActivity extends Activity {
                 canvas.rotate(45);
                 canvas.drawRect(0, 0, 20, 10, p);
                 canvas.restore();
+                canvas.save();
+                canvas.translate(mOffset + 280, yOffset);
+                canvas.scale(0.5f, 8);
+                canvas.rotate(0.5f);
+                canvas.drawRect(0, 0, 80, 5, p);
+                canvas.restore();
                 canvas.restore();
 
                 yOffset += 100;