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 "SampleCode.h"
8 #include "SkView.h"
9 #include "SkCanvas.h"
10 #include "SkPaint.h"
11 #include "SkPath.h"
12 #include "SkPictureRecorder.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 "SkBlurMask.h"
24 #include "SkBlurDrawLooper.h"
25
makebm(SkBitmap * bm,SkColorType ct,int w,int h)26 static void makebm(SkBitmap* bm, SkColorType ct, int w, int h) {
27 bm->allocPixels(SkImageInfo::Make(w, h, ct, kPremul_SkAlphaType));
28 bm->eraseColor(SK_ColorTRANSPARENT);
29
30 SkCanvas canvas(*bm);
31 SkPoint pts[] = { { 0, 0 }, { SkIntToScalar(w), SkIntToScalar(h) } };
32 SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE };
33 SkScalar pos[] = { 0, SK_Scalar1/2, SK_Scalar1 };
34 SkPaint paint;
35
36 paint.setDither(true);
37 paint.setShader(SkGradientShader::MakeLinear(pts, colors, pos,
38 SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode));
39 canvas.drawPaint(paint);
40 }
41
setup(SkPaint * paint,const SkBitmap & bm,bool filter,SkShader::TileMode tmx,SkShader::TileMode tmy)42 static void setup(SkPaint* paint, const SkBitmap& bm, bool filter,
43 SkShader::TileMode tmx, SkShader::TileMode tmy) {
44 paint->setShader(SkShader::MakeBitmapShader(bm, tmx, tmy));
45 paint->setFilterQuality(filter ? kLow_SkFilterQuality : kNone_SkFilterQuality);
46 }
47
48 static const SkColorType gColorTypes[] = {
49 kN32_SkColorType,
50 kRGB_565_SkColorType,
51 };
52 static const int gWidth = 32;
53 static const int gHeight = 32;
54
55 class TilingView : public SampleView {
56 sk_sp<SkPicture> fTextPicture;
57 sk_sp<SkDrawLooper> fLooper;
58 public:
TilingView()59 TilingView()
60 : fLooper(SkBlurDrawLooper::Make(0x88000000,
61 SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(1)),
62 SkIntToScalar(2), SkIntToScalar(2))) {
63 for (size_t i = 0; i < SK_ARRAY_COUNT(gColorTypes); i++) {
64 makebm(&fTexture[i], gColorTypes[i], gWidth, gHeight);
65 }
66 }
67
~TilingView()68 virtual ~TilingView() {
69 }
70
71 SkBitmap fTexture[SK_ARRAY_COUNT(gColorTypes)];
72
73 protected:
74 // overrides from SkEventSink
onQuery(SkEvent * evt)75 virtual bool onQuery(SkEvent* evt) {
76 if (SampleCode::TitleQ(*evt)) {
77 SampleCode::TitleR(evt, "Tiling");
78 return true;
79 }
80 return this->INHERITED::onQuery(evt);
81 }
82
onDrawContent(SkCanvas * canvas)83 virtual void onDrawContent(SkCanvas* canvas) {
84 SkRect r = { 0, 0, SkIntToScalar(gWidth*2), SkIntToScalar(gHeight*2) };
85
86 static const char* gConfigNames[] = { "8888", "565", "4444" };
87
88 static const bool gFilters[] = { false, true };
89 static const char* gFilterNames[] = { "point", "bilinear" };
90
91 static const SkShader::TileMode gModes[] = { SkShader::kClamp_TileMode, SkShader::kRepeat_TileMode, SkShader::kMirror_TileMode };
92 static const char* gModeNames[] = { "C", "R", "M" };
93
94 SkScalar y = SkIntToScalar(24);
95 SkScalar x = SkIntToScalar(10);
96
97 SkPictureRecorder recorder;
98 SkCanvas* textCanvas = nullptr;
99 if (nullptr == fTextPicture) {
100 textCanvas = recorder.beginRecording(1000, 1000, nullptr, 0);
101 }
102
103 if (textCanvas) {
104 for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
105 for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
106 SkPaint p;
107 SkString str;
108 p.setAntiAlias(true);
109 p.setDither(true);
110 p.setLooper(fLooper);
111 str.printf("[%s,%s]", gModeNames[kx], gModeNames[ky]);
112
113 p.setTextAlign(SkPaint::kCenter_Align);
114 textCanvas->drawText(str.c_str(), str.size(), x + r.width()/2, y, p);
115
116 x += r.width() * 4 / 3;
117 }
118 }
119 }
120
121 y += SkIntToScalar(16);
122
123 for (size_t i = 0; i < SK_ARRAY_COUNT(gColorTypes); i++) {
124 for (size_t j = 0; j < SK_ARRAY_COUNT(gFilters); j++) {
125 x = SkIntToScalar(10);
126 for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
127 for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
128 SkPaint paint;
129 setup(&paint, fTexture[i], gFilters[j], gModes[kx], gModes[ky]);
130 paint.setDither(true);
131
132 canvas->save();
133 canvas->translate(x, y);
134 canvas->drawRect(r, paint);
135 canvas->restore();
136
137 x += r.width() * 4 / 3;
138 }
139 }
140 if (textCanvas) {
141 SkPaint p;
142 SkString str;
143 p.setAntiAlias(true);
144 p.setLooper(fLooper);
145 str.printf("%s, %s", gConfigNames[i], gFilterNames[j]);
146 textCanvas->drawText(str.c_str(), str.size(), x, y + r.height() * 2 / 3, p);
147 }
148
149 y += r.height() * 4 / 3;
150 }
151 }
152
153 if (textCanvas) {
154 SkASSERT(nullptr == fTextPicture);
155 fTextPicture = recorder.finishRecordingAsPicture();
156 }
157
158 SkASSERT(fTextPicture);
159 canvas->drawPicture(fTextPicture.get());
160 }
161
162 private:
163 typedef SampleView INHERITED;
164 };
165
166 //////////////////////////////////////////////////////////////////////////////
167
MyFactory()168 static SkView* MyFactory() { return new TilingView; }
169 static SkViewRegister reg(MyFactory);
170