blob: 3a8eb13749824b6d8ae7c3e4ec05dd9b6427b7b7 [file] [log] [blame]
bsalomon@google.coma3108262011-10-10 14:08:47 +00001/*
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
8#include "SampleCode.h"
9#include "SkView.h"
10#include "SkCanvas.h"
11#include "SkDevice.h"
12#include "SkColorPriv.h"
13#include "SkShader.h"
14
bsalomon@google.coma3108262011-10-10 14:08:47 +000015static const struct {
16 SkXfermode::Mode fMode;
17 const char* fLabel;
18} gModes[] = {
19 { SkXfermode::kClear_Mode, "Clear" },
20 { SkXfermode::kSrc_Mode, "Src" },
21 { SkXfermode::kDst_Mode, "Dst" },
22 { SkXfermode::kSrcOver_Mode, "SrcOver" },
23 { SkXfermode::kDstOver_Mode, "DstOver" },
24 { SkXfermode::kSrcIn_Mode, "SrcIn" },
25 { SkXfermode::kDstIn_Mode, "DstIn" },
26 { SkXfermode::kSrcOut_Mode, "SrcOut" },
27 { SkXfermode::kDstOut_Mode, "DstOut" },
28 { SkXfermode::kSrcATop_Mode, "SrcATop" },
29 { SkXfermode::kDstATop_Mode, "DstATop" },
30 { SkXfermode::kXor_Mode, "Xor" },
31};
32
33const int gWidth = 64;
34const int gHeight = 64;
35const SkScalar W = SkIntToScalar(gWidth);
36const SkScalar H = SkIntToScalar(gHeight);
37
38static SkScalar drawCell(SkCanvas* canvas, SkXfermode* mode,
39 SkAlpha a0, SkAlpha a1) {
40
41 SkPaint paint;
42 paint.setAntiAlias(true);
43
44 SkRect r = SkRect::MakeWH(W, H);
45 r.inset(W/10, H/10);
46
47 paint.setColor(SK_ColorBLUE);
48 paint.setAlpha(a0);
49 canvas->drawOval(r, paint);
50
51 paint.setColor(SK_ColorRED);
52 paint.setAlpha(a1);
53 paint.setXfermode(mode);
54
55 SkScalar offset = SK_Scalar1 / 3;
56 SkRect rect = SkRect::MakeXYWH(W / 4 + offset,
57 H / 4 + offset,
58 W / 2, H / 2);
59 canvas->drawRect(rect, paint);
rmistry@google.comae933ce2012-08-23 18:19:56 +000060
bsalomon@google.coma3108262011-10-10 14:08:47 +000061 return H;
62}
63
64static SkShader* make_bg_shader() {
65 SkBitmap bm;
66 bm.setConfig(SkBitmap::kARGB_8888_Config, 2, 2);
67 bm.allocPixels();
68 *bm.getAddr32(0, 0) = *bm.getAddr32(1, 1) = 0xFFFFFFFF;
69 *bm.getAddr32(1, 0) = *bm.getAddr32(0, 1) = SkPackARGB32(0xFF, 0xCC,
70 0xCC, 0xCC);
71
72 SkShader* s = SkShader::CreateBitmapShader(bm,
73 SkShader::kRepeat_TileMode,
74 SkShader::kRepeat_TileMode);
rmistry@google.comae933ce2012-08-23 18:19:56 +000075
bsalomon@google.coma3108262011-10-10 14:08:47 +000076 SkMatrix m;
77 m.setScale(SkIntToScalar(6), SkIntToScalar(6));
78 s->setLocalMatrix(m);
79 return s;
80}
81
82class AARectsModesView : public SampleView {
83 SkPaint fBGPaint;
84public:
85 AARectsModesView () {
86 fBGPaint.setShader(make_bg_shader())->unref();
87 }
88
89protected:
90 // overrides from SkEventSink
91 virtual bool onQuery(SkEvent* evt) {
92 if (SampleCode::TitleQ(*evt)) {
93 SampleCode::TitleR(evt, "AARectsModes");
94 return true;
95 }
96 return this->INHERITED::onQuery(evt);
97 }
98
99 virtual void onDrawContent(SkCanvas* canvas) {
100 const SkRect bounds = SkRect::MakeWH(W, H);
101 static const SkAlpha gAlphaValue[] = { 0xFF, 0x88, 0x88 };
102
103 canvas->translate(SkIntToScalar(4), SkIntToScalar(4));
104
105 for (int alpha = 0; alpha < 4; ++alpha) {
106 canvas->save();
107 canvas->save();
108 for (size_t i = 0; i < SK_ARRAY_COUNT(gModes); ++i) {
109 if (6 == i) {
110 canvas->restore();
111 canvas->translate(W * 5, 0);
112 canvas->save();
113 }
114 SkXfermode* mode = SkXfermode::Create(gModes[i].fMode);
rmistry@google.comae933ce2012-08-23 18:19:56 +0000115
bsalomon@google.coma3108262011-10-10 14:08:47 +0000116 canvas->drawRect(bounds, fBGPaint);
117 canvas->saveLayer(&bounds, NULL);
118 SkScalar dy = drawCell(canvas, mode,
119 gAlphaValue[alpha & 1],
120 gAlphaValue[alpha & 2]);
121 canvas->restore();
122
123 canvas->translate(0, dy * 5 / 4);
124 SkSafeUnref(mode);
125 }
126 canvas->restore();
127 canvas->restore();
128 canvas->translate(W * 5 / 4, 0);
129 }
130 }
rmistry@google.comae933ce2012-08-23 18:19:56 +0000131
bsalomon@google.coma3108262011-10-10 14:08:47 +0000132private:
133 typedef SampleView INHERITED;
134};
135
136///////////////////////////////////////////////////////////////////////////////
137
138static SkView* MyFactory() { return new AARectsModesView; }
139static SkViewRegister reg(MyFactory);