add sample for 2ptradial where we divide by zero

git-svn-id: http://skia.googlecode.com/svn/trunk@1832 2bbb7eff-a529-9590-31e7-b0007b416f81

gyp/SampleApp.gyp

@@ -32,6 +32,7 @@
 
         '../samplecode/ClockFaceView.cpp',
         '../samplecode/OverView.cpp',
+        '../samplecode/Sample2PtRadial.cpp',
         '../samplecode/SampleAll.cpp',
         '../samplecode/SampleAnimator.cpp',
         '../samplecode/SampleApp.cpp',

samplecode/Sample2PtRadial.cpp

@@ -0,0 +1,45 @@
+#include "SampleCode.h"
+#include "SkView.h"
+#include "SkCanvas.h"
+#include "SkGradientShader.h"
+
+
+class TwoPtRadialView : public SampleView {
+public:
+    TwoPtRadialView() {}
+
+protected:
+    // overrides from SkEventSink
+    virtual bool onQuery(SkEvent* evt) {
+        if (SampleCode::TitleQ(*evt)) {
+            SampleCode::TitleR(evt, "2PtRadial");
+            return true;
+        }
+        return this->INHERITED::onQuery(evt);
+    }
+
+    virtual void onDrawContent(SkCanvas* canvas) {
+        canvas->translate(SkIntToScalar(10), SkIntToScalar(20));
+
+        SkColor colors[] = { SK_ColorRED, SK_ColorBLUE };
+        SkPoint c0 = { 0, 0 };
+        SkScalar r0 = 100;
+        SkPoint c1 = { 100, 100 };
+        SkScalar r1 = 100;
+        SkShader* s = SkGradientShader::CreateTwoPointRadial(c0, r0, c1, r1, colors,
+                                                             NULL, 2,
+                                                             SkShader::kClamp_TileMode);
+        
+        SkPaint paint;
+        paint.setShader(s)->unref();
+        canvas->drawPaint(paint);
+    }
+
+private:
+    typedef SampleView INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+static SkView* MyFactory() { return new TwoPtRadialView; }
+static SkViewRegister reg(MyFactory);