add dithering to 32bit linear gradients

git-svn-id: http://skia.googlecode.com/svn/trunk@691 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 46 insertions, 0 deletions

diff --git a/samplecode/SampleBigGradient.cpp b/samplecode/SampleBigGradient.cpp
new file mode 100644
index 0000000000..5d6d247bcd
--- /dev/null
+++ b/samplecode/SampleBigGradient.cpp
@@ -0,0 +1,46 @@
+#include "SampleCode.h"
+#include "SkView.h"
+#include "SkCanvas.h"
+#include "SkGradientShader.h"
+
+static SkShader* make_grad(SkScalar w, SkScalar h) {
+    SkColor colors[] = { 0xFF000000, 0xFF333333 };
+    SkPoint pts[] = { { 0, 0 }, { w, h } };
+    return SkGradientShader::CreateLinear(pts, colors, NULL, 2,
+                                          SkShader::kClamp_TileMode);
+}
+
+class BigGradientView : public SkView {
+public:
+	BigGradientView() {}
+
+protected:
+    // overrides from SkEventSink
+    virtual bool onQuery(SkEvent* evt) {
+        if (SampleCode::TitleQ(*evt)) {
+            SampleCode::TitleR(evt, "BigGradient");
+            return true;
+        }
+        return this->INHERITED::onQuery(evt);
+    }
+
+    void drawBG(SkCanvas* canvas) {
+    }
+
+    virtual void onDraw(SkCanvas* canvas) {
+        SkRect r;
+        r.set(0, 0, this->width(), this->height());
+        SkPaint p;
+        p.setShader(make_grad(this->width(), this->height()))->unref();
+        canvas->drawRect(r, p);
+    }
+
+private:
+    typedef SkView INHERITED;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
+static SkView* MyFactory() { return new BigGradientView; }
+static SkViewRegister reg(MyFactory);
+