When a picture lies about its size (i.e., claims to be 100x100 but only ever draws to 90x100) arbitrary pixel differences can appear in the undrawn portion. This is causing spurious differences to appear in the 8888 vs. gpu telemetry results.
R=bsalomon@google.com
Author: robertphillips@google.com
Review URL: https://codereview.chromium.org/136553004
git-svn-id: http://skia.googlecode.com/svn/trunk@13084 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tools/PictureRenderer.cpp b/tools/PictureRenderer.cpp
index 53654b9..b81f058 100644
--- a/tools/PictureRenderer.cpp
+++ b/tools/PictureRenderer.cpp
@@ -178,6 +178,11 @@
}
setUpFilter(canvas, fDrawFilters);
this->scaleToScaleFactor(canvas);
+
+ // Pictures often lie about their extent (i.e., claim to be 100x100 but
+ // only ever draw to 90x100). Clear here so the undrawn portion will have
+ // a consistent color
+ canvas->clear(SK_ColorTRANSPARENT);
return canvas;
}