new samples

git-svn-id: http://skia.googlecode.com/svn/trunk@1239 2bbb7eff-a529-9590-31e7-b0007b416f81

samplecode/SampleClamp.cpp

@@ -0,0 +1,61 @@
+#include "SampleCode.h"
+#include "SkView.h"
+#include "SkCanvas.h"
+#include "SkGraphics.h"
+#include "SkRandom.h"
+#include "SkGradientShader.h"
+#include "SkPicture.h"
+
+static SkShader* make_linear() {
+    SkPoint pts[] = { 0, 0, SK_Scalar1/500, SK_Scalar1/500 };
+    SkColor colors[] = { SK_ColorRED, SK_ColorBLUE };
+    return SkGradientShader::CreateLinear(pts, colors, NULL, 2,
+                                          SkShader::kClamp_TileMode);
+}
+
+class ClampView : public SampleView {
+    SkShader*   fGrad;
+
+public:
+    ClampView() {
+        fGrad = make_linear();
+    }
+
+    virtual ~ClampView() {
+        fGrad->unref();
+    }
+
+protected:
+    // overrides from SkEventSink
+    virtual bool onQuery(SkEvent* evt) {
+        if (SampleCode::TitleQ(*evt)) {
+            SampleCode::TitleR(evt, "Clamp");
+            return true;
+        }
+        return this->INHERITED::onQuery(evt);
+    }
+
+    virtual void onDrawContent(SkCanvas* canvas) {
+        SkPaint paint;
+        paint.setShader(fGrad);
+
+//        canvas->translate(this->width()/2, this->height()/2);
+        canvas->translate(64, 64);
+        canvas->drawPaint(paint);
+
+        SkPicture pic;
+        SkCanvas* c = pic.beginRecording(100, 100, 0);
+        SkCanvas::LayerIter layerIterator(c, false);
+        layerIterator.next();
+        layerIterator.done();
+    }
+
+private:
+    typedef SampleView INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+static SkView* MyFactory() { return new ClampView; }
+static SkViewRegister reg(MyFactory);
+

samplecode/SampleDash.cpp

@@ -0,0 +1,88 @@
+#include "SampleCode.h"
+#include "SkView.h"
+#include "SkCanvas.h"
+#include "SkGraphics.h"
+#include "SkRandom.h"
+#include "SkDashPathEffect.h"
+#include "SkShader.h"
+
+static void setBitmapDash(SkPaint* paint, int width) {
+    SkColor c = paint->getColor();
+
+    SkBitmap bm;
+    bm.setConfig(SkBitmap::kARGB_8888_Config, 2, 1);
+    bm.allocPixels();
+    bm.lockPixels();
+    *bm.getAddr32(0, 0) = SkPreMultiplyARGB(0xFF, SkColorGetR(c),
+                                            SkColorGetG(c), SkColorGetB(c));
+    *bm.getAddr32(1, 0) = 0;
+    bm.unlockPixels();
+
+    SkMatrix matrix;
+    matrix.setScale(SkIntToScalar(width), SK_Scalar1);
+
+    SkShader* s = SkShader::CreateBitmapShader(bm, SkShader::kRepeat_TileMode,
+                                               SkShader::kClamp_TileMode);
+    s->setLocalMatrix(matrix);
+
+    paint->setShader(s)->unref();
+}
+
+class DashView : public SampleView {
+public:
+    DashView() {
+        this->setBGColor(0xFFDDDDDD);
+    }
+    
+protected:
+    // overrides from SkEventSink
+    virtual bool onQuery(SkEvent* evt) {
+        if (SampleCode::TitleQ(*evt)) {
+            SampleCode::TitleR(evt, "Dash");
+            return true;
+        }
+        return this->INHERITED::onQuery(evt);
+    }
+
+    virtual void onDrawContent(SkCanvas* canvas) {
+        static const char* gStr[] = {
+            "11",
+            "44",
+            "112233",
+            "411327463524",
+        };
+
+        SkPaint paint;
+        paint.setStrokeWidth(SkIntToScalar(1));
+
+        SkScalar x0 = SkIntToScalar(10);
+        SkScalar y0 = SkIntToScalar(10);
+        SkScalar x1 = x0 + SkIntToScalar(1000);
+        for (size_t i = 0; i < SK_ARRAY_COUNT(gStr); i++) {
+            SkScalar interval[12];
+            size_t len = SkMin32(strlen(gStr[i]), SK_ARRAY_COUNT(interval));
+            for (size_t j = 0; j < len; j++) {
+                interval[j] = SkIntToScalar(gStr[i][j] - '0');
+            }
+            
+            SkDashPathEffect dash(interval, len, 0);
+            paint.setPathEffect(&dash);
+            canvas->drawLine(x0, y0, x1, y0, paint);
+            paint.setPathEffect(NULL);
+
+            y0 += paint.getStrokeWidth() * 3;
+        }
+
+        setBitmapDash(&paint, 3);
+        canvas->drawLine(x0, y0, x1, y0, paint);
+    }
+
+private:
+    typedef SampleView INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+static SkView* MyFactory() { return new DashView; }
+static SkViewRegister reg(MyFactory);
+