1 /*
2 * Copyright 2011 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 #include "include/core/SkBitmap.h"
8 #include "include/core/SkCanvas.h"
9 #include "include/core/SkPaint.h"
10 #include "include/core/SkShader.h"
11 #include "samplecode/Sample.h"
12
createBitmap(int n)13 static SkBitmap createBitmap(int n) {
14 SkBitmap bitmap;
15 bitmap.allocN32Pixels(n, n);
16 bitmap.eraseColor(SK_ColorGREEN);
17
18 SkCanvas canvas(bitmap);
19 SkRect r;
20 r.set(0, 0, SkIntToScalar(n), SkIntToScalar(n));
21 SkPaint paint;
22 paint.setAntiAlias(true);
23
24 paint.setColor(SK_ColorRED);
25 canvas.drawOval(r, paint);
26 paint.setColor(SK_ColorBLUE);
27 paint.setStrokeWidth(SkIntToScalar(n)/15);
28 paint.setStyle(SkPaint::kStroke_Style);
29 canvas.drawLine(0, 0, r.fRight, r.fBottom, paint);
30 canvas.drawLine(0, r.fBottom, r.fRight, 0, paint);
31
32 return bitmap;
33 }
34
35 static constexpr int N = 64;
36
37 class AARectView : public Sample {
38 SkBitmap fBitmap;
39
onOnceBeforeDraw()40 void onOnceBeforeDraw() override {
41 fBitmap = createBitmap(N);
42 }
43
name()44 SkString name() override { return SkString("AA Rects"); }
45
onDrawContent(SkCanvas * canvas)46 void onDrawContent(SkCanvas* canvas) override {
47 canvas->translate(SkIntToScalar(10), SkIntToScalar(10));
48
49 SkPaint bluePaint;
50 bluePaint.setARGB(0xff, 0x0, 0x0, 0xff);
51 SkPaint bmpPaint;
52 bmpPaint.setShader(fBitmap.makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat));
53 bluePaint.setStrokeWidth(3);
54 bmpPaint.setStrokeWidth(3);
55
56 SkPaint paints[] = { bluePaint, bmpPaint };
57
58 SkRect rect;
59
60 SkScalar dx = SkIntToScalar(80);
61 SkScalar dy = SkIntToScalar(100);
62 SkMatrix matrix;
63 for (size_t p = 0; p < SK_ARRAY_COUNT(paints); ++p) {
64 for (int stroke = 0; stroke < 2; ++stroke) {
65 paints[p].setStyle(stroke ? SkPaint::kStroke_Style : SkPaint::kFill_Style);
66 for (int a = 0; a < 3; ++ a) {
67 paints[p].setAntiAlias(a > 0);
68 paints[p].setAlpha(a > 1 ? 0x80 : 0xff);
69
70 canvas->save();
71 rect = SkRect::MakeLTRB(0.f,
72 0.f,
73 40.f,
74 40.f);
75 canvas->drawRect(rect, paints[p]);
76 canvas->translate(dx, 0);
77
78 rect = SkRect::MakeLTRB(0.5f,
79 0.5f,
80 40.5f,
81 40.5f);
82 canvas->drawRect(rect, paints[p]);
83 canvas->translate(dx, 0);
84
85 rect = SkRect::MakeLTRB(0.5f,
86 0.5f,
87 40.f,
88 40.f);
89 canvas->drawRect(rect, paints[p]);
90 canvas->translate(dx, 0);
91
92 rect = SkRect::MakeLTRB(0.75f,
93 0.75f,
94 40.75f,
95 40.75f);
96 canvas->drawRect(rect, paints[p]);
97 canvas->translate(dx, 0);
98
99 canvas->save();
100 canvas->translate(.33f, .67f);
101 rect = SkRect::MakeLTRB(0.0f,
102 0.0f,
103 40.0f,
104 40.0f);
105 canvas->drawRect(rect, paints[p]);
106 canvas->restore();
107 canvas->translate(dx, 0);
108
109 canvas->save();
110 matrix.setRotate(45.f);
111 canvas->concat(matrix);
112 canvas->translate(20.0f / sqrtf(2.f),
113 20.0f / sqrtf(2.f));
114 rect = SkRect::MakeLTRB(-20.0f,
115 -20.0f,
116 20.0f,
117 20.0f);
118 canvas->drawRect(rect, paints[p]);
119 canvas->restore();
120 canvas->translate(dx, 0);
121
122 canvas->save();
123 canvas->rotate(90.f);
124 rect = SkRect::MakeLTRB(0.0f,
125 0.0f,
126 40.0f,
127 -40.0f);
128 canvas->drawRect(rect, paints[p]);
129 canvas->restore();
130 canvas->translate(dx, 0);
131
132 canvas->save();
133 canvas->rotate(90.f);
134 rect = SkRect::MakeLTRB(0.5f,
135 0.5f,
136 40.5f,
137 -40.5f);
138 canvas->drawRect(rect, paints[p]);
139 canvas->restore();
140 canvas->translate(dx, 0);
141
142 canvas->save();
143 matrix.setScale(-1.f, -1.f);
144 canvas->concat(matrix);
145 rect = SkRect::MakeLTRB(0.5f,
146 0.5f,
147 -40.5f,
148 -40.5f);
149 canvas->drawRect(rect, paints[p]);
150 canvas->restore();
151 canvas->translate(dx, 0);
152
153 canvas->save();
154 matrix.setScale(2.1f, 4.1f);
155 canvas->concat(matrix);
156 rect = SkRect::MakeLTRB(0.1f,
157 0.1f,
158 19.1f,
159 9.1f);
160 canvas->drawRect(rect, paints[p]);
161 canvas->restore();
162 canvas->translate(dx, 0);
163
164 canvas->restore();
165 canvas->translate(0, dy);
166 }
167 }
168 }
169 }
170
171 private:
172
173 typedef Sample INHERITED;
174 };
175
176 //////////////////////////////////////////////////////////////////////////////
177
178 DEF_SAMPLE( return new AARectView(); )
179