1 files changed, 81 insertions, 0 deletions
diff --git a/chromium/third_party/skia/gm/bitmaprecttest.cpp b/chromium/third_party/skia/gm/bitmaprecttest.cpp
new file mode 100644
index 00000000000..06495b957e4
--- /dev/null
+++ b/chromium/third_party/skia/gm/bitmaprecttest.cpp
@@ -0,0 +1,81 @@
+/*
+ * Copyright 2013 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "gm.h"
+#include "SkCanvas.h"
+
+static void make_bm(SkBitmap* bm) {
+    bm->allocN32Pixels(60, 60);
+    bm->eraseColor(0);
+
+    SkCanvas canvas(*bm);
+    SkPaint paint;
+
+    SkPath path;
+    path.moveTo(6, 6);
+    path.lineTo(6, 54);
+    path.lineTo(30, 54);
+    canvas.drawPath(path, paint);
+
+    paint.setStyle(SkPaint::kStroke_Style);
+    canvas.drawRect(SkRect::MakeLTRB(0.5f, 0.5f, 59.5f, 59.5f), paint);
+}
+
+// This creates a close, but imperfect concatenation of
+//      scaling the image up by its dst-rect
+//      scaling the image down by the matrix' scale
+//  The bug was that for cases like this, we were incorrectly trying to take a
+//  fast-path in the bitmapshader, but ended up drawing the last col of pixels
+//  twice. The fix resulted in (a) not taking the fast-path, but (b) drawing
+//  the image correctly.
+//
+static void test_bitmaprect(SkCanvas* canvas) {
+    SkBitmap bm;
+    make_bm(&bm);
+
+    canvas->drawBitmap(bm, 150, 45, NULL);
+
+    SkScalar scale = 0.472560018f;
+    canvas->save();
+    canvas->scale(scale, scale);
+    canvas->drawBitmapRectToRect(bm, NULL, SkRect::MakeXYWH(100, 100, 128, 128), NULL);
+    canvas->restore();
+
+    canvas->scale(-1, 1);
+    canvas->drawBitmap(bm, -310, 45, NULL);
+}
+
+class BitmapRectTestGM : public skiagm::GM {
+public:
+    BitmapRectTestGM() {
+
+    }
+
+protected:
+    virtual uint32_t onGetFlags() const SK_OVERRIDE {
+        return kSkipTiled_Flag;
+    }
+
+    virtual SkString onShortName() {
+        return SkString("bitmaprecttest");
+    }
+
+    virtual SkISize onISize() {
+        return SkISize::Make(320, 240);
+    }
+
+    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+        test_bitmaprect(canvas);
+    }
+
+private:
+    typedef skiagm::GM INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+DEF_GM( return new BitmapRectTestGM; )