1 files changed, 164 insertions, 0 deletions
diff --git a/chromium/third_party/skia/samplecode/SampleClip.cpp b/chromium/third_party/skia/samplecode/SampleClip.cpp
new file mode 100644
index 00000000000..3a38724e9c4
--- /dev/null
+++ b/chromium/third_party/skia/samplecode/SampleClip.cpp
@@ -0,0 +1,164 @@
+/*
+ * Copyright 2011 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SampleCode.h"
+#include "SkView.h"
+#include "SkCanvas.h"
+#include "SkColorPriv.h"
+#include "SkDevice.h"
+#include "SkPaint.h"
+#include "SkRandom.h"
+
+#define W   150
+#define H   200
+
+static void show_text(SkCanvas* canvas, bool doAA) {
+    SkRandom rand;
+    SkPaint paint;
+    paint.setAntiAlias(doAA);
+    paint.setLCDRenderText(true);
+    paint.setTextSize(SkIntToScalar(20));
+
+    for (int i = 0; i < 200; ++i) {
+        paint.setColor((SK_A32_MASK << SK_A32_SHIFT) | rand.nextU());
+        canvas->drawText("Hamburgefons", 12,
+                         rand.nextSScalar1() * W, rand.nextSScalar1() * H + 20,
+                         paint);
+    }
+}
+
+static void show_fill(SkCanvas* canvas, bool doAA) {
+    SkRandom rand;
+    SkPaint paint;
+    paint.setAntiAlias(doAA);
+
+    for (int i = 0; i < 50; ++i) {
+        SkRect r;
+        SkPath p;
+
+        r.setXYWH(rand.nextSScalar1() * W, rand.nextSScalar1() * H,
+                  rand.nextUScalar1() * W, rand.nextUScalar1() * H);
+        paint.setColor(rand.nextU());
+        canvas->drawRect(r, paint);
+
+        r.setXYWH(rand.nextSScalar1() * W, rand.nextSScalar1() * H,
+                  rand.nextUScalar1() * W, rand.nextUScalar1() * H);
+        paint.setColor(rand.nextU());
+        p.addOval(r);
+        canvas->drawPath(p, paint);
+    }
+}
+
+static SkScalar randRange(SkRandom& rand, SkScalar min, SkScalar max) {
+    SkASSERT(min <= max);
+    return min + SkScalarMul(rand.nextUScalar1(), max - min);
+}
+
+static void show_stroke(SkCanvas* canvas, bool doAA, SkScalar strokeWidth, int n) {
+    SkRandom rand;
+    SkPaint paint;
+    paint.setAntiAlias(doAA);
+    paint.setStyle(SkPaint::kStroke_Style);
+    paint.setStrokeWidth(strokeWidth);
+
+    for (int i = 0; i < n; ++i) {
+        SkRect r;
+        SkPath p;
+
+        r.setXYWH(rand.nextSScalar1() * W, rand.nextSScalar1() * H,
+                  rand.nextUScalar1() * W, rand.nextUScalar1() * H);
+        paint.setColor(rand.nextU());
+        canvas->drawRect(r, paint);
+
+        r.setXYWH(rand.nextSScalar1() * W, rand.nextSScalar1() * H,
+                  rand.nextUScalar1() * W, rand.nextUScalar1() * H);
+        paint.setColor(rand.nextU());
+        p.addOval(r);
+        canvas->drawPath(p, paint);
+
+        const SkScalar minx = -SkIntToScalar(W)/4;
+        const SkScalar maxx = 5*SkIntToScalar(W)/4;
+        const SkScalar miny = -SkIntToScalar(H)/4;
+        const SkScalar maxy = 5*SkIntToScalar(H)/4;
+        paint.setColor(rand.nextU());
+        canvas->drawLine(randRange(rand, minx, maxx), randRange(rand, miny, maxy),
+                         randRange(rand, minx, maxx), randRange(rand, miny, maxy),
+                         paint);
+    }
+}
+
+static void show_hair(SkCanvas* canvas, bool doAA) {
+    show_stroke(canvas, doAA, 0, 150);
+}
+
+static void show_thick(SkCanvas* canvas, bool doAA) {
+    show_stroke(canvas, doAA, SkIntToScalar(5), 50);
+}
+
+typedef void (*CanvasProc)(SkCanvas*, bool);
+
+#include "SkAAClip.h"
+
+class ClipView : public SampleView {
+public:
+    ClipView() {
+        SkAAClip clip;
+        SkIRect r = { -2, -3, 842, 18 };
+        clip.setRect(r);
+    }
+
+    virtual ~ClipView() {
+    }
+
+protected:
+    // overrides from SkEventSink
+    virtual bool onQuery(SkEvent* evt) {
+        if (SampleCode::TitleQ(*evt)) {
+            SampleCode::TitleR(evt, "Clip");
+            return true;
+        }
+        return this->INHERITED::onQuery(evt);
+    }
+
+    virtual void onDrawContent(SkCanvas* canvas) {
+        canvas->drawColor(SK_ColorWHITE);
+        canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
+
+        static const CanvasProc gProc[] = {
+            show_text, show_thick, show_hair, show_fill
+        };
+
+        SkRect r = { 0, 0, SkIntToScalar(W), SkIntToScalar(H) };
+        SkPath clipPath;
+        r.inset(SK_Scalar1 / 4, SK_Scalar1 / 4);
+        clipPath.addRoundRect(r, SkIntToScalar(20), SkIntToScalar(20));
+
+//        clipPath.toggleInverseFillType();
+
+        for (int aa = 0; aa <= 1; ++aa) {
+            canvas->save();
+            for (size_t i = 0; i < SK_ARRAY_COUNT(gProc); ++i) {
+                canvas->save();
+                canvas->clipPath(clipPath, SkRegion::kIntersect_Op, SkToBool(aa));
+//                canvas->drawColor(SK_ColorWHITE);
+                gProc[i](canvas, SkToBool(aa));
+                canvas->restore();
+                canvas->translate(W * SK_Scalar1 * 8 / 7, 0);
+            }
+            canvas->restore();
+            canvas->translate(0, H * SK_Scalar1 * 8 / 7);
+        }
+    }
+
+private:
+    typedef SampleView INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+static SkView* MyFactory() { return new ClipView; }
+static SkViewRegister reg(MyFactory);