add sample effects
git-svn-id: http://skia.googlecode.com/svn/trunk@180 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleEffects.cpp b/samplecode/SampleEffects.cpp
new file mode 100644
index 0000000..507f727
--- /dev/null
+++ b/samplecode/SampleEffects.cpp
@@ -0,0 +1,113 @@
+#include "SampleCode.h"
+#include "SkCanvas.h"
+#include "SkPaint.h"
+#include "SkPorterDuff.h"
+#include "SkView.h"
+
+#include "SkBlurMaskFilter.h"
+#include "SkColorMatrixFilter.h"
+#include "SkDiscretePathEffect.h"
+#include "SkGradientShader.h"
+
+//#define COLOR 0xFFFF8844
+#define COLOR 0xFF888888
+
+static void paint_proc0(SkPaint* paint) {
+}
+
+static void paint_proc1(SkPaint* paint) {
+ paint->setMaskFilter(SkBlurMaskFilter::Create(2,
+ SkBlurMaskFilter::kNormal_BlurStyle))->unref();
+}
+
+static void paint_proc2(SkPaint* paint) {
+ SkScalar dir[3] = { 1, 1, 1};
+ paint->setMaskFilter(
+ SkBlurMaskFilter::CreateEmboss(dir, 0.1, 0.05, 1))->unref();
+}
+
+static void paint_proc3(SkPaint* paint) {
+ SkColor colors[] = { SK_ColorRED, COLOR, SK_ColorBLUE };
+ SkPoint pts[] = { 3, 0, 7, 5 };
+ paint->setShader(SkGradientShader::CreateLinear(pts, colors, NULL, SK_ARRAY_COUNT(colors),
+ SkShader::kMirror_TileMode))->unref();
+}
+
+static void paint_proc5(SkPaint* paint) {
+ paint_proc3(paint);
+ paint_proc2(paint);
+}
+
+typedef void (*PaintProc)(SkPaint*);
+const PaintProc gPaintProcs[] = {
+ paint_proc0,
+ paint_proc1,
+ paint_proc2,
+ paint_proc3,
+ paint_proc5,
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
+class EffectsView : public SkView {
+public:
+ SkPath fPath;
+ SkPaint fPaint[SK_ARRAY_COUNT(gPaintProcs)];
+
+ EffectsView() {
+ size_t i;
+ const float pts[] = {
+ 0, 0,
+ 10, 0,
+ 10, 5,
+ 20, -5,
+ 10, -15,
+ 10, -10,
+ 0, -10
+ };
+ fPath.moveTo(pts[0], pts[1]);
+ for (i = 2; i < SK_ARRAY_COUNT(pts); i += 2) {
+ fPath.lineTo(pts[i], pts[i+1]);
+ }
+
+ for (i = 0; i < SK_ARRAY_COUNT(gPaintProcs); i++) {
+ fPaint[i].setAntiAlias(true);
+ fPaint[i].setColor(COLOR);
+ gPaintProcs[i](&fPaint[i]);
+ }
+ }
+
+protected:
+ // overrides from SkEventSink
+ virtual bool onQuery(SkEvent* evt) {
+ if (SampleCode::TitleQ(*evt)) {
+ SampleCode::TitleR(evt, "Effects");
+ return true;
+ }
+ return this->INHERITED::onQuery(evt);
+ }
+
+ void drawBG(SkCanvas* canvas) {
+ canvas->drawColor(0xFFDDDDDD);
+ }
+
+ virtual void onDraw(SkCanvas* canvas) {
+ this->drawBG(canvas);
+
+ canvas->scale(3, 3);
+ canvas->translate(10, 30);
+ for (size_t i = 0; i < SK_ARRAY_COUNT(fPaint); i++) {
+ canvas->drawPath(fPath, fPaint[i]);
+ canvas->translate(32, 0);
+ }
+ }
+
+private:
+ typedef SkView INHERITED;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
+static SkView* MyFactory() { return new EffectsView; }
+static SkViewRegister reg(MyFactory);
+