add test for large strokes on circles

git-svn-id: http://skia.googlecode.com/svn/trunk@6932 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 87 insertions, 0 deletions

diff --git a/samplecode/SampleRotateCircles.cpp b/samplecode/SampleRotateCircles.cpp
new file mode 100644
index 0000000000..739900de62
--- /dev/null
+++ b/samplecode/SampleRotateCircles.cpp
@@ -0,0 +1,87 @@
+/*
+ * Copyright 2012 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SampleCode.h"
+#include "SkView.h"
+#include "SkCanvas.h"
+#include "SkRandom.h"
+
+static void rotateAbout(SkCanvas* canvas, SkScalar degrees,
+                        SkScalar cx, SkScalar cy) {
+    canvas->translate(cx, cy);
+    canvas->rotate(degrees);
+    canvas->translate(-cx, -cy);
+}
+
+class RotateCirclesView : public SampleView {
+public:
+    RotateCirclesView() {
+        this->setBGColor(SK_ColorLTGRAY);
+        
+        fAngle = 0;
+    }
+
+protected:
+    // overrides from SkEventSink
+    virtual bool onQuery(SkEvent* evt) {
+        if (SampleCode::TitleQ(*evt)) {
+            SampleCode::TitleR(evt, "RotateCircles");
+            return true;
+        }
+        return this->INHERITED::onQuery(evt);
+    }
+
+    virtual void onDrawContent(SkCanvas* canvas) {
+        SkRandom rand;
+        SkPaint paint;
+        paint.setAntiAlias(true);
+        paint.setStrokeWidth(20);
+
+        SkScalar cx = 240;
+        SkScalar cy = 240;
+        SkScalar DX = 240 * 2;
+        SkColor color = 0;
+
+        float scale = 1;
+        float sign = 0.3f;
+        for (SkScalar rad = 200; rad >= 20; rad -= 15) {
+            sign = -sign;
+            scale += 0.2f;
+
+            paint.setColor(rand.nextU());
+            paint.setAlpha(0xFF);
+            color = ~color;
+    
+            paint.setStyle(SkPaint::kFill_Style);
+
+            canvas->save();
+            rotateAbout(canvas, fAngle * scale * sign, cx, cy);
+            canvas->drawCircle(cx, cy, rad, paint);
+            canvas->restore();
+
+            paint.setStyle(SkPaint::kStroke_Style);
+            paint.setStrokeWidth(rad*2);
+
+            canvas->save();
+            rotateAbout(canvas, fAngle * scale * sign, cx + DX, cy);
+            canvas->drawCircle(cx + DX, cy, 10, paint);
+            canvas->restore();
+            
+        }
+        
+        fAngle = (fAngle + 1) % 360;
+        this->inval(NULL);
+    }
+
+private:
+    int fAngle;
+    typedef SkView INHERITED;
+};
+
+static SkView* F0() { return new RotateCirclesView; }
+static SkViewRegister gR0(F0);
+