commit 7f1ed835e90027f63fbb25d19fb71d128b13834d
author robertphillips <robertphillips@google.com> Fri Oct 03 07:29:20 2014 -0700
committer Commit bot <commit-bot@chromium.org> Fri Oct 03 07:29:20 2014 -0700
tree fd52bbea96e3d41695ab4de6c7524cc895a9861d
parent 4611e7f479b1176a31af0bdc2a12528df5f75167

Reduce overdraw in MultiPictureDraw Sierpinski GM

As written, all the layers in the MPD Sierpinski GM are full screen. This CL bounds each layer to reduce overdraw.

This CL will cause differences in:

multipicturedraw_sierpinski_simple
multipicturedraw_sierpinski_tiled

but they are/will be suppressed in: (Don't turn on dither for saveLayers which have no paint - https://codereview.chromium.org/619363002/)

Review URL: https://codereview.chromium.org/582633003

gm/multipicturedraw.cpp

diff --git a/gm/multipicturedraw.cpp b/gm/multipicturedraw.cpp
index 9a3f1a8..afa83e5 100644
--- a/gm/multipicturedraw.cpp
+++ b/gm/multipicturedraw.cpp
@@ -155,6 +155,9 @@
 
     SkCanvas* canvas = recorder.beginRecording(SkIntToScalar(kPicWidth),
                                                SkIntToScalar(kPicHeight));
+    SkRect r = tri.getBounds();
+    r.outset(2.0f, 2.0f);       // outset for stroke
+    canvas->clipRect(r);
     // The saveLayer/restore block is to exercise layer hoisting
     canvas->saveLayer(NULL, NULL);
         canvas->drawPath(tri, fill);