1 /*
2 * Copyright 2012 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "gm.h"
9 #include "SkCanvas.h"
10 #include "SkRRect.h"
11 #include "SkPath.h"
12
13 typedef void (*InsetProc)(const SkRRect&, SkScalar dx, SkScalar dy, SkRRect*);
14
inset0(const SkRRect & src,SkScalar dx,SkScalar dy,SkRRect * dst)15 static void inset0(const SkRRect& src, SkScalar dx, SkScalar dy, SkRRect* dst) {
16 SkRect r = src.rect();
17
18 r.inset(dx, dy);
19 if (r.isEmpty()) {
20 dst->setEmpty();
21 return;
22 }
23
24 SkVector radii[4];
25 for (int i = 0; i < 4; ++i) {
26 radii[i] = src.radii((SkRRect::Corner)i);
27 }
28 for (int i = 0; i < 4; ++i) {
29 radii[i].fX -= dx;
30 radii[i].fY -= dy;
31 }
32 dst->setRectRadii(r, radii);
33 }
34
inset1(const SkRRect & src,SkScalar dx,SkScalar dy,SkRRect * dst)35 static void inset1(const SkRRect& src, SkScalar dx, SkScalar dy, SkRRect* dst) {
36 SkRect r = src.rect();
37
38 r.inset(dx, dy);
39 if (r.isEmpty()) {
40 dst->setEmpty();
41 return;
42 }
43
44 SkVector radii[4];
45 for (int i = 0; i < 4; ++i) {
46 radii[i] = src.radii((SkRRect::Corner)i);
47 }
48 dst->setRectRadii(r, radii);
49 }
50
inset2(const SkRRect & src,SkScalar dx,SkScalar dy,SkRRect * dst)51 static void inset2(const SkRRect& src, SkScalar dx, SkScalar dy, SkRRect* dst) {
52 SkRect r = src.rect();
53
54 r.inset(dx, dy);
55 if (r.isEmpty()) {
56 dst->setEmpty();
57 return;
58 }
59
60 SkVector radii[4];
61 for (int i = 0; i < 4; ++i) {
62 radii[i] = src.radii((SkRRect::Corner)i);
63 }
64 for (int i = 0; i < 4; ++i) {
65 if (radii[i].fX) {
66 radii[i].fX -= dx;
67 }
68 if (radii[i].fY) {
69 radii[i].fY -= dy;
70 }
71 }
72 dst->setRectRadii(r, radii);
73 }
74
prop(SkScalar radius,SkScalar newSize,SkScalar oldSize)75 static SkScalar prop(SkScalar radius, SkScalar newSize, SkScalar oldSize) {
76 return newSize * radius / oldSize;
77 }
78
inset3(const SkRRect & src,SkScalar dx,SkScalar dy,SkRRect * dst)79 static void inset3(const SkRRect& src, SkScalar dx, SkScalar dy, SkRRect* dst) {
80 SkRect r = src.rect();
81
82 r.inset(dx, dy);
83 if (r.isEmpty()) {
84 dst->setEmpty();
85 return;
86 }
87
88 SkVector radii[4];
89 for (int i = 0; i < 4; ++i) {
90 radii[i] = src.radii((SkRRect::Corner)i);
91 }
92 for (int i = 0; i < 4; ++i) {
93 radii[i].fX = prop(radii[i].fX, r.width(), src.rect().width());
94 radii[i].fY = prop(radii[i].fY, r.height(), src.rect().height());
95 }
96 dst->setRectRadii(r, radii);
97 }
98
draw_rrect_color(SkCanvas * canvas,const SkRRect & rrect)99 static void draw_rrect_color(SkCanvas* canvas, const SkRRect& rrect) {
100 SkPaint paint;
101 paint.setAntiAlias(true);
102 paint.setStyle(SkPaint::kStroke_Style);
103
104 if (rrect.isRect()) {
105 paint.setColor(SK_ColorRED);
106 } else if (rrect.isOval()) {
107 paint.setColor(0xFF008800);
108 } else if (rrect.isSimple()) {
109 paint.setColor(SK_ColorBLUE);
110 } else {
111 paint.setColor(SK_ColorBLACK);
112 }
113 canvas->drawRRect(rrect, paint);
114 }
115
drawrr(SkCanvas * canvas,const SkRRect & rrect,InsetProc proc)116 static void drawrr(SkCanvas* canvas, const SkRRect& rrect, InsetProc proc) {
117 SkRRect rr;
118 for (SkScalar d = -30; d <= 30; d += 5) {
119 proc(rrect, d, d, &rr);
120 draw_rrect_color(canvas, rr);
121 }
122 }
123
124 class RRectGM : public skiagm::GM {
125 public:
RRectGM()126 RRectGM() {}
127
128 protected:
onGetFlags() const129 virtual uint32_t onGetFlags() const SK_OVERRIDE {
130 return kSkipTiled_Flag;
131 }
132
onShortName()133 virtual SkString onShortName() {
134 return SkString("rrect");
135 }
136
onISize()137 virtual SkISize onISize() {
138 return SkISize::Make(820, 710);
139 }
140
onDraw(SkCanvas * canvas)141 virtual void onDraw(SkCanvas* canvas) {
142 static const InsetProc insetProcs[] = {
143 inset0, inset1, inset2, inset3
144 };
145
146 SkRRect rrect[4];
147 SkRect r = { 0, 0, 120, 100 };
148 SkVector radii[4] = {
149 { 0, 0 }, { 30, 1 }, { 10, 40 }, { 40, 40 }
150 };
151
152 rrect[0].setRect(r);
153 rrect[1].setOval(r);
154 rrect[2].setRectXY(r, 20, 20);
155 rrect[3].setRectRadii(r, radii);
156
157 canvas->translate(50.5f, 50.5f);
158 for (size_t j = 0; j < SK_ARRAY_COUNT(insetProcs); ++j) {
159 canvas->save();
160 for (size_t i = 0; i < SK_ARRAY_COUNT(rrect); ++i) {
161 drawrr(canvas, rrect[i], insetProcs[j]);
162 canvas->translate(200, 0);
163 }
164 canvas->restore();
165 canvas->translate(0, 170);
166 }
167 }
168
169 private:
170 typedef GM INHERITED;
171 };
172
173 DEF_GM( return new RRectGM; )
174