commit 50da5043ad224fd6b6024ed73785a9502bf7978d
author chaviw <chaviw@google.com> Mon Apr 09 13:49:37 2018 -0700
committer Chavi Weingarten <chaviw@google.com> Thu Apr 12 19:34:58 2018 +0000
tree b6be4ec360db2ef03904fb9c7eb2007076e79fa4
parent 2788edd12f4f149dc8eadb561566edb66aa4f7e8

Set window to transparent when screenshotting layer.

Set the screenshot to transparent instead of black. This allows the
system to draw a color behind without having to crop out the area that
may not be drawn into.

Bug: 76442549
Test: When going to recents, area not drawn from layers is now
transparent instead of black.
Test: Transaction_test#CaptureTransparent

Change-Id: Id535eb753d3d1cae82658cd33423ce588aaa62f8

services/surfaceflinger/DisplayDevice.h

diff --git a/services/surfaceflinger/DisplayDevice.h b/services/surfaceflinger/DisplayDevice.h
index e844d11..61ce30c 100644
--- a/services/surfaceflinger/DisplayDevice.h
+++ b/services/surfaceflinger/DisplayDevice.h
@@ -281,7 +281,8 @@
                               rotation) {}
     DisplayRenderArea(const sp<const DisplayDevice> device, Rect sourceCrop, uint32_t reqHeight,
                       uint32_t reqWidth, ISurfaceComposer::Rotation rotation)
-          : RenderArea(reqHeight, reqWidth, rotation), mDevice(device), mSourceCrop(sourceCrop) {}
+          : RenderArea(reqHeight, reqWidth, CaptureFill::OPAQUE, rotation), mDevice(device),
+                              mSourceCrop(sourceCrop) {}
 
     const Transform& getTransform() const override { return mDevice->getTransform(); }
     Rect getBounds() const override { return mDevice->getBounds(); }