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-rw-r--r--tools/PictureRenderer.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/PictureRenderer.cpp b/tools/PictureRenderer.cpp
index b9b01e4cf9..64021525b0 100644
--- a/tools/PictureRenderer.cpp
+++ b/tools/PictureRenderer.cpp
@@ -612,6 +612,7 @@ static void draw_tile_to_canvas(SkCanvas* canvas,
SkMatrix mat(canvas->getTotalMatrix());
mat.postTranslate(-SkIntToScalar(tileRect.fLeft), -SkIntToScalar(tileRect.fTop));
canvas->setMatrix(mat);
+ canvas->clear(SK_ColorTRANSPARENT); // Not every picture covers the entirety of every tile
canvas->drawPicture(picture);
canvas->restoreToCount(saveCount);
canvas->flush();