SamplePoints.cpp revision 6485b0be74f66587b51ca3c476b24b0e2674ca5b 
1
2/*
3 * Copyright 2011 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8#include "SampleCode.h"
9#include "SkView.h"
10#include "SkCanvas.h"
11#include "Sk64.h"
12#include "SkGradientShader.h"
13#include "SkGraphics.h"
14#include "SkImageDecoder.h"
15#include "SkKernel33MaskFilter.h"
16#include "SkPath.h"
17#include "SkRandom.h"
18#include "SkRegion.h"
19#include "SkShader.h"
20#include "SkUtils.h"
21#include "SkColorPriv.h"
22#include "SkColorFilter.h"
23#include "SkTime.h"
24#include "SkTypeface.h"
25#include "SkXfermode.h"
26
27#include "SkStream.h"
28#include "SkXMLParser.h"
29
30class PointsView : public SampleView {
31public:
32    PointsView() {}
33
34protected:
35    // overrides from SkEventSink
36    virtual bool onQuery(SkEvent* evt) {
37        if (SampleCode::TitleQ(*evt)) {
38            SampleCode::TitleR(evt, "Points");
39            return true;
40        }
41        return this->INHERITED::onQuery(evt);
42    }
43
44    static void fill_pts(SkPoint pts[], size_t n, SkMWCRandom* rand) {
45        for (size_t i = 0; i < n; i++)
46            pts[i].set(rand->nextUScalar1() * 640, rand->nextUScalar1() * 480);
47    }
48
49    virtual void onDrawContent(SkCanvas* canvas) {
50        canvas->translate(SK_Scalar1, SK_Scalar1);
51
52        SkMWCRandom rand;
53        SkPaint  p0, p1, p2, p3;
54        const size_t n = 99;
55
56        p0.setColor(SK_ColorRED);
57        p1.setColor(SK_ColorGREEN);
58        p2.setColor(SK_ColorBLUE);
59        p3.setColor(SK_ColorWHITE);
60
61        p0.setStrokeWidth(SkIntToScalar(4));
62        p2.setStrokeCap(SkPaint::kRound_Cap);
63        p2.setStrokeWidth(SkIntToScalar(6));
64
65        SkPoint* pts = new SkPoint[n];
66        fill_pts(pts, n, &rand);
67
68        canvas->drawPoints(SkCanvas::kPolygon_PointMode, n, pts, p0);
69        canvas->drawPoints(SkCanvas::kLines_PointMode, n, pts, p1);
70        canvas->drawPoints(SkCanvas::kPoints_PointMode, n, pts, p2);
71        canvas->drawPoints(SkCanvas::kPoints_PointMode, n, pts, p3);
72
73        delete[] pts;
74    }
75
76private:
77
78    typedef SampleView INHERITED;
79};
80
81//////////////////////////////////////////////////////////////////////////////
82
83static SkView* MyFactory() { return new PointsView; }
84static SkViewRegister reg(MyFactory);
85