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 "SampleCode.h"
9 #include "SkView.h"
10 #include "SkCanvas.h"
11 #include "SkPaint.h"
12 #include "SkPath.h"
13 #include "SkRegion.h"
14 #include "SkShader.h"
15 #include "SkUtils.h"
16 #include "SkColorPriv.h"
17 #include "SkColorFilter.h"
18 #include "SkPicture.h"
19 #include "SkTypeface.h"
20
21 // effects
22 #include "SkGradientShader.h"
23 #include "SkUnitMappers.h"
24 #include "SkBlurDrawLooper.h"
25
makebm(SkBitmap * bm,SkBitmap::Config config,int w,int h)26 static void makebm(SkBitmap* bm, SkBitmap::Config config, int w, int h) {
27 bm->setConfig(config, w, h);
28 bm->allocPixels();
29 bm->eraseColor(0);
30
31 SkCanvas canvas(*bm);
32 SkPoint pts[] = { { 0, 0 }, { SkIntToScalar(w), SkIntToScalar(h) } };
33 SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE };
34 SkScalar pos[] = { 0, SK_Scalar1/2, SK_Scalar1 };
35 SkPaint paint;
36
37 SkUnitMapper* um = NULL;
38
39 um = new SkCosineMapper;
40 // um = new SkDiscreteMapper(12);
41
42 SkAutoUnref au(um);
43
44 paint.setDither(true);
45 paint.setShader(SkGradientShader::CreateLinear(pts, colors, pos,
46 SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode, um))->unref();
47 canvas.drawPaint(paint);
48 }
49
setup(SkPaint * paint,const SkBitmap & bm,bool filter,SkShader::TileMode tmx,SkShader::TileMode tmy)50 static void setup(SkPaint* paint, const SkBitmap& bm, bool filter,
51 SkShader::TileMode tmx, SkShader::TileMode tmy) {
52 SkShader* shader = SkShader::CreateBitmapShader(bm, tmx, tmy);
53 paint->setShader(shader)->unref();
54 paint->setFilterBitmap(filter);
55 }
56
57 static const SkBitmap::Config gConfigs[] = {
58 SkBitmap::kARGB_8888_Config,
59 SkBitmap::kRGB_565_Config,
60 SkBitmap::kARGB_4444_Config
61 };
62 static const int gWidth = 32;
63 static const int gHeight = 32;
64
65 class TilingView : public SampleView {
66 SkPicture* fTextPicture;
67 SkBlurDrawLooper fLooper;
68 public:
TilingView()69 TilingView()
70 : fLooper(SkIntToScalar(1), SkIntToScalar(2), SkIntToScalar(2),
71 0x88000000) {
72 fTextPicture = new SkPicture();
73 for (size_t i = 0; i < SK_ARRAY_COUNT(gConfigs); i++) {
74 makebm(&fTexture[i], gConfigs[i], gWidth, gHeight);
75 }
76 }
77
~TilingView()78 ~TilingView() {
79 fTextPicture->unref();
80 }
81
82 SkBitmap fTexture[SK_ARRAY_COUNT(gConfigs)];
83
84 protected:
85 // overrides from SkEventSink
onQuery(SkEvent * evt)86 virtual bool onQuery(SkEvent* evt) {
87 if (SampleCode::TitleQ(*evt)) {
88 SampleCode::TitleR(evt, "Tiling");
89 return true;
90 }
91 return this->INHERITED::onQuery(evt);
92 }
93
onDrawContent(SkCanvas * canvas)94 virtual void onDrawContent(SkCanvas* canvas) {
95 SkRect r = { 0, 0, SkIntToScalar(gWidth*2), SkIntToScalar(gHeight*2) };
96
97 static const char* gConfigNames[] = { "8888", "565", "4444" };
98
99 static const bool gFilters[] = { false, true };
100 static const char* gFilterNames[] = { "point", "bilinear" };
101
102 static const SkShader::TileMode gModes[] = { SkShader::kClamp_TileMode, SkShader::kRepeat_TileMode, SkShader::kMirror_TileMode };
103 static const char* gModeNames[] = { "C", "R", "M" };
104
105 SkScalar y = SkIntToScalar(24);
106 SkScalar x = SkIntToScalar(10);
107
108 SkCanvas* textCanvas = NULL;
109 if (fTextPicture->width() == 0) {
110 textCanvas = fTextPicture->beginRecording(1000, 1000);
111 }
112
113 if (textCanvas) {
114 for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
115 for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
116 SkPaint p;
117 SkString str;
118 p.setAntiAlias(true);
119 p.setDither(true);
120 p.setLooper(&fLooper);
121 str.printf("[%s,%s]", gModeNames[kx], gModeNames[ky]);
122
123 p.setTextAlign(SkPaint::kCenter_Align);
124 textCanvas->drawText(str.c_str(), str.size(), x + r.width()/2, y, p);
125
126 x += r.width() * 4 / 3;
127 }
128 }
129 }
130
131 y += SkIntToScalar(16);
132
133 for (size_t i = 0; i < SK_ARRAY_COUNT(gConfigs); i++) {
134 for (size_t j = 0; j < SK_ARRAY_COUNT(gFilters); j++) {
135 x = SkIntToScalar(10);
136 for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
137 for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
138 SkPaint paint;
139 setup(&paint, fTexture[i], gFilters[j], gModes[kx], gModes[ky]);
140 paint.setDither(true);
141
142 canvas->save();
143 canvas->translate(x, y);
144 canvas->drawRect(r, paint);
145 canvas->restore();
146
147 x += r.width() * 4 / 3;
148 }
149 }
150 if (textCanvas) {
151 SkPaint p;
152 SkString str;
153 p.setAntiAlias(true);
154 p.setLooper(&fLooper);
155 str.printf("%s, %s", gConfigNames[i], gFilterNames[j]);
156 textCanvas->drawText(str.c_str(), str.size(), x, y + r.height() * 2 / 3, p);
157 }
158
159 y += r.height() * 4 / 3;
160 }
161 }
162
163 canvas->drawPicture(*fTextPicture);
164 }
165
166 private:
167 typedef SampleView INHERITED;
168 };
169
170 //////////////////////////////////////////////////////////////////////////////
171
MyFactory()172 static SkView* MyFactory() { return new TilingView; }
173 static SkViewRegister reg(MyFactory);
174
175