SkPDF: properly dedup bitmaps in shaders
BUG=skia:5161
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1848383002
Review URL: https://codereview.chromium.org/1848383002
diff --git a/gm/subsetshader.cpp b/gm/subsetshader.cpp
new file mode 100644
index 0000000..c4ef5f7
--- /dev/null
+++ b/gm/subsetshader.cpp
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "Resources.h"
+#include "SkBitmap.h"
+#include "gm.h"
+
+DEF_SIMPLE_GM(bitmap_subset_shader, canvas, 256, 256) {
+ canvas->clear(SK_ColorWHITE);
+
+ SkBitmap source;
+ if (!GetResourceAsBitmap("color_wheel.png", &source)) {
+ return;
+ }
+ SkIRect left = SkIRect::MakeWH(source.width()/2, source.height());
+ SkIRect right = SkIRect::MakeXYWH(source.width()/2, 0,
+ source.width()/2, source.height());
+ SkBitmap leftBitmap, rightBitmap;
+ source.extractSubset(&leftBitmap, left);
+ source.extractSubset(&rightBitmap, right);
+
+ SkMatrix matrix;
+ matrix.setScale(0.75f, 0.75f);
+ matrix.preRotate(30.0f);
+ SkShader::TileMode tm = SkShader::kRepeat_TileMode;
+ SkPaint paint;
+ paint.setShader(SkShader::MakeBitmapShader(leftBitmap, tm, tm, &matrix));
+ canvas->drawRect(SkRect::MakeWH(256.0f, 128.0f), paint);
+ paint.setShader(SkShader::MakeBitmapShader(rightBitmap, tm, tm, &matrix));
+ canvas->drawRect(SkRect::MakeXYWH(0, 128.0f, 256.0f, 128.0f), paint);
+}