Fix transformed stroke width in GrAALinearizingConvexPathRenderer.
BUG=520476
Review URL: https://codereview.chromium.org/1302503003
diff --git a/gm/scaledstrokes.cpp b/gm/scaledstrokes.cpp
new file mode 100644
index 0000000..59c3efb
--- /dev/null
+++ b/gm/scaledstrokes.cpp
@@ -0,0 +1,84 @@
+/*
+ * Copyright 2015 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"
+#include "SkRRect.h"
+#include "SkPath.h"
+
+class ScaledStrokesGM : public skiagm::GM {
+public:
+ ScaledStrokesGM() {}
+
+protected:
+
+ SkString onShortName() override {
+ return SkString("scaledstrokes");
+ }
+
+ SkISize onISize() override {
+ return SkISize::Make(640, 320);
+ }
+
+ static void draw_path(SkScalar size, SkCanvas* canvas, SkPaint paint) {
+ SkScalar c = 0.551915024494f * size;
+ SkPath path;
+ path.moveTo(0.0f, size);
+ path.cubicTo(c, size, size, c, size, 0.0f);
+ path.cubicTo(size, -c, c, -size, 0.0f, -size);
+ path.cubicTo(-c, -size, -size, -c, -size, 0.0f);
+ path.cubicTo(-size, c, -c, size, 0.0f, size);
+ canvas->drawPath(path, paint);
+ }
+
+ void onDraw(SkCanvas* canvas) override {
+ SkPaint paint;
+ SkPath path;
+ paint.setStyle(SkPaint::Style::kStroke_Style);
+ canvas->translate(5.0f, 5.0f);
+ const SkScalar size = 60.0f;
+ for (int i = 0; i < 2; i++) {
+ paint.setAntiAlias(i == 1);
+ canvas->save();
+ for (int j = 0; j < 4; j++) {
+ SkScalar scale = 4.0f - j;
+ paint.setStrokeWidth(4.0f / scale);
+ canvas->save();
+ canvas->translate(size / 2.0f, size / 2.0f);
+ canvas->scale(scale, scale);
+ draw_path(size / 2.0f / scale, canvas, paint);
+ canvas->restore();
+
+ canvas->save();
+ canvas->translate(size / 2.0f, 80.0f + size / 2.0f);
+ canvas->scale(scale, scale);
+ canvas->drawCircle(0.0f, 0.0f, size / 2.0f / scale, paint);
+ canvas->restore();
+
+ canvas->save();
+ canvas->translate(0.0f, 160.0f);
+ canvas->scale(scale, scale);
+ canvas->drawRect(SkRect::MakeXYWH(0.0f, 0.0f, size / scale, size / scale), paint);
+ canvas->restore();
+
+ canvas->save();
+ canvas->translate(0.0f, 240.0f);
+ canvas->scale(scale, scale);
+ canvas->drawLine(0.0f, 0.0f, size / scale, size / scale, paint);
+ canvas->restore();
+
+ canvas->translate(80.0f, 0.0f);
+ }
+ }
+
+ }
+
+private:
+ typedef GM INHERITED;
+};
+
+DEF_GM( return new ScaledStrokesGM; )