points.cpp revision a965a15abd57ea1bbbbfcc8dc1574d7d7a2e424d 
1#include "gm.h"
2#include "SkRandom.h"
3
4namespace skiagm {
5
6class PointsGM : public GM {
7public:
8	PointsGM() {}
9
10protected:
11    virtual SkString onShortName() {
12        return SkString("points");
13    }
14
15	virtual SkISize onISize() {
16        return make_isize(640, 490);
17    }
18
19    void drawBG(SkCanvas* canvas) {
20        canvas->drawColor(SK_ColorWHITE);
21    }
22
23    static void fill_pts(SkPoint pts[], size_t n, SkRandom* rand) {
24        for (size_t i = 0; i < n; i++)
25            pts[i].set(rand->nextUScalar1() * 640, rand->nextUScalar1() * 480);
26    }
27
28    virtual void onDraw(SkCanvas* canvas) {
29        this->drawBG(canvas);
30
31        canvas->translate(SK_Scalar1, SK_Scalar1);
32
33        SkRandom rand;
34        SkPaint  p0, p1, p2, p3;
35        const size_t n = 99;
36
37        p0.setColor(SK_ColorRED);
38        p1.setColor(SK_ColorGREEN);
39        p2.setColor(SK_ColorBLUE);
40        p3.setColor(SK_ColorWHITE);
41
42        p0.setStrokeWidth(SkIntToScalar(4));
43        p2.setStrokeCap(SkPaint::kRound_Cap);
44        p2.setStrokeWidth(SkIntToScalar(6));
45
46        SkPoint* pts = new SkPoint[n];
47        fill_pts(pts, n, &rand);
48
49        canvas->drawPoints(SkCanvas::kPolygon_PointMode, n, pts, p0);
50        canvas->drawPoints(SkCanvas::kLines_PointMode, n, pts, p1);
51        canvas->drawPoints(SkCanvas::kPoints_PointMode, n, pts, p2);
52        canvas->drawPoints(SkCanvas::kPoints_PointMode, n, pts, p3);
53
54        delete[] pts;
55    }
56
57private:
58    typedef GM INHERITED;
59};
60
61//////////////////////////////////////////////////////////////////////////////
62
63static GM* MyFactory(void*) { return new PointsGM; }
64static GMRegistry reg(MyFactory);
65
66}
67
68