Chop quads exactly on the clip bounds, so we don't spend CPU cycles walking them
when we're above or below the clip.
Still to do:
- chop in X to avoid 16.16. overflow in the edgelist
- apply the same logic for cubics (tho much harder math)
git-svn-id: http://skia.googlecode.com/svn/trunk@88 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SamplePathClip.cpp b/samplecode/SamplePathClip.cpp
new file mode 100644
index 0000000..f4dd032
--- /dev/null
+++ b/samplecode/SamplePathClip.cpp
@@ -0,0 +1,85 @@
+#include "SampleCode.h"
+#include "SkView.h"
+#include "SkCanvas.h"
+#include "SkGradientShader.h"
+#include "SkGraphics.h"
+#include "SkImageDecoder.h"
+#include "SkPath.h"
+#include "SkPorterDuff.h"
+#include "SkRegion.h"
+#include "SkShader.h"
+#include "SkUtils.h"
+#include "SkXfermode.h"
+#include "SkColorPriv.h"
+#include "SkColorFilter.h"
+#include "SkTime.h"
+#include "SkTypeface.h"
+
+class PathClipView : public SkView {
+public:
+ SkRect fOval;
+ SkPoint fCenter;
+
+ PathClipView() {
+ fOval.set(0, 0, SkIntToScalar(200), SkIntToScalar(50));
+ fCenter.set(SkIntToScalar(250), SkIntToScalar(250));
+ }
+
+ virtual ~PathClipView() {}
+
+protected:
+ // overrides from SkEventSink
+ virtual bool onQuery(SkEvent* evt) {
+ if (SampleCode::TitleQ(*evt)) {
+ SampleCode::TitleR(evt, "PathClip");
+ return true;
+ }
+ return this->INHERITED::onQuery(evt);
+ }
+
+ void drawBG(SkCanvas* canvas) {
+ canvas->drawColor(SK_ColorWHITE);
+ }
+
+ virtual void onDraw(SkCanvas* canvas) {
+ this->drawBG(canvas);
+
+ SkRect oval = fOval;
+ oval.offset(fCenter.fX - oval.centerX(), fCenter.fY - oval.centerY());
+
+ SkPaint p;
+ p.setAntiAlias(true);
+
+ p.setStyle(SkPaint::kStroke_Style);
+ canvas->drawOval(oval, p);
+
+ SkRect r;
+ r.set(SkIntToScalar(200), SkIntToScalar(200),
+ SkIntToScalar(300), SkIntToScalar(300));
+ canvas->clipRect(r);
+
+ p.setStyle(SkPaint::kFill_Style);
+ p.setColor(SK_ColorRED);
+ canvas->drawRect(r, p);
+
+ p.setColor(0x800000FF);
+ r.set(SkIntToScalar(150), SkIntToScalar(10),
+ SkIntToScalar(250), SkIntToScalar(400));
+ canvas->drawOval(oval, p);
+ }
+
+ virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) {
+ fCenter.set(x, y);
+ this->inval(NULL);
+ return NULL;
+ }
+
+private:
+ typedef SkView INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+static SkView* MyFactory() { return new PathClipView; }
+static SkViewRegister reg(MyFactory);
+