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 "gm.h"
9
10 namespace skiagm {
11
12 class Poly2PolyGM : public GM {
13 public:
Poly2PolyGM()14 Poly2PolyGM() {}
15
16 protected:
onShortName()17 virtual SkString onShortName() {
18 return SkString("poly2poly");
19 }
20
onISize()21 virtual SkISize onISize() {
22 return make_isize(835, 840);
23 }
24
doDraw(SkCanvas * canvas,SkPaint * paint,const int isrc[],const int idst[],int count)25 static void doDraw(SkCanvas* canvas, SkPaint* paint, const int isrc[],
26 const int idst[], int count) {
27 SkMatrix matrix;
28 SkPoint src[4], dst[4];
29
30 for (int i = 0; i < count; i++) {
31 src[i].set(SkIntToScalar(isrc[2*i+0]), SkIntToScalar(isrc[2*i+1]));
32 dst[i].set(SkIntToScalar(idst[2*i+0]), SkIntToScalar(idst[2*i+1]));
33 }
34
35 canvas->save();
36 matrix.setPolyToPoly(src, dst, count);
37 canvas->concat(matrix);
38
39 paint->setColor(SK_ColorGRAY);
40 paint->setStyle(SkPaint::kStroke_Style);
41 const SkScalar D = SkIntToScalar(64);
42 canvas->drawRectCoords(0, 0, D, D, *paint);
43 canvas->drawLine(0, 0, D, D, *paint);
44 canvas->drawLine(0, D, D, 0, *paint);
45
46 SkPaint::FontMetrics fm;
47 paint->getFontMetrics(&fm);
48 paint->setColor(SK_ColorRED);
49 paint->setStyle(SkPaint::kFill_Style);
50 SkScalar x = D/2;
51 SkScalar y = D/2 - (fm.fAscent + fm.fDescent)/2;
52 SkString str;
53 str.appendS32(count);
54 canvas->drawText(str.c_str(), str.size(), x, y, *paint);
55
56 canvas->restore();
57 }
58
onDraw(SkCanvas * canvas)59 virtual void onDraw(SkCanvas* canvas) {
60 SkPaint paint;
61 paint.setAntiAlias(true);
62 paint.setStrokeWidth(SkIntToScalar(4));
63 paint.setTextSize(SkIntToScalar(40));
64 paint.setTextAlign(SkPaint::kCenter_Align);
65
66 canvas->save();
67 canvas->translate(SkIntToScalar(10), SkIntToScalar(10));
68 // translate (1 point)
69 const int src1[] = { 0, 0 };
70 const int dst1[] = { 5, 5 };
71 doDraw(canvas, &paint, src1, dst1, 1);
72 canvas->restore();
73
74 canvas->save();
75 canvas->translate(SkIntToScalar(160), SkIntToScalar(10));
76 // rotate/uniform-scale (2 points)
77 const int src2[] = { 32, 32, 64, 32 };
78 const int dst2[] = { 32, 32, 64, 48 };
79 doDraw(canvas, &paint, src2, dst2, 2);
80 canvas->restore();
81
82 canvas->save();
83 canvas->translate(SkIntToScalar(10), SkIntToScalar(110));
84 // rotate/skew (3 points)
85 const int src3[] = { 0, 0, 64, 0, 0, 64 };
86 const int dst3[] = { 0, 0, 96, 0, 24, 64 };
87 doDraw(canvas, &paint, src3, dst3, 3);
88 canvas->restore();
89
90 canvas->save();
91 canvas->translate(SkIntToScalar(160), SkIntToScalar(110));
92 // perspective (4 points)
93 const int src4[] = { 0, 0, 64, 0, 64, 64, 0, 64 };
94 const int dst4[] = { 0, 0, 96, 0, 64, 96, 0, 64 };
95 doDraw(canvas, &paint, src4, dst4, 4);
96 canvas->restore();
97 }
98
99 private:
100 typedef GM INHERITED;
101 };
102
103 //////////////////////////////////////////////////////////////////////////////
104
MyFactory(void *)105 static GM* MyFactory(void*) { return new Poly2PolyGM; }
106 static GMRegistry reg(MyFactory);
107
108 }
109
110