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 "SkPictureRecorder.h"
14 #include "SkRegion.h"
15 #include "SkShader.h"
16 #include "SkUtils.h"
17 #include "SkColorPriv.h"
18 #include "SkColorFilter.h"
19 #include "SkPicture.h"
20 #include "SkTypeface.h"
21
22 // effects
23 #include "SkGradientShader.h"
24 #include "SkBlurMask.h"
25 #include "SkBlurDrawLooper.h"
26
makebm(SkBitmap * bm,SkColorType ct,int w,int h)27 static void makebm(SkBitmap* bm, SkColorType ct, int w, int h) {
28 bm->allocPixels(SkImageInfo::Make(w, h, ct, kPremul_SkAlphaType));
29 bm->eraseColor(SK_ColorTRANSPARENT);
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 paint.setDither(true);
38 paint.setShader(SkGradientShader::CreateLinear(pts, colors, pos,
39 SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode))->unref();
40 canvas.drawPaint(paint);
41 }
42
setup(SkPaint * paint,const SkBitmap & bm,bool filter,SkShader::TileMode tmx,SkShader::TileMode tmy)43 static void setup(SkPaint* paint, const SkBitmap& bm, bool filter,
44 SkShader::TileMode tmx, SkShader::TileMode tmy) {
45 SkShader* shader = SkShader::CreateBitmapShader(bm, tmx, tmy);
46 paint->setShader(shader)->unref();
47 paint->setFilterQuality(filter ? kLow_SkFilterQuality : kNone_SkFilterQuality);
48 }
49
50 static const SkColorType gColorTypes[] = {
51 kN32_SkColorType,
52 kRGB_565_SkColorType,
53 };
54 static const int gWidth = 32;
55 static const int gHeight = 32;
56
57 class TilingView : public SampleView {
58 SkAutoTUnref<SkPicture> fTextPicture;
59 SkAutoTUnref<SkDrawLooper> fLooper;
60 public:
TilingView()61 TilingView()
62 : fLooper(SkBlurDrawLooper::Create(0x88000000,
63 SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(1)),
64 SkIntToScalar(2), SkIntToScalar(2))) {
65 for (size_t i = 0; i < SK_ARRAY_COUNT(gColorTypes); i++) {
66 makebm(&fTexture[i], gColorTypes[i], gWidth, gHeight);
67 }
68 }
69
~TilingView()70 virtual ~TilingView() {
71 }
72
73 SkBitmap fTexture[SK_ARRAY_COUNT(gColorTypes)];
74
75 protected:
76 // overrides from SkEventSink
onQuery(SkEvent * evt)77 virtual bool onQuery(SkEvent* evt) {
78 if (SampleCode::TitleQ(*evt)) {
79 SampleCode::TitleR(evt, "Tiling");
80 return true;
81 }
82 return this->INHERITED::onQuery(evt);
83 }
84
onDrawContent(SkCanvas * canvas)85 virtual void onDrawContent(SkCanvas* canvas) {
86 SkRect r = { 0, 0, SkIntToScalar(gWidth*2), SkIntToScalar(gHeight*2) };
87
88 static const char* gConfigNames[] = { "8888", "565", "4444" };
89
90 static const bool gFilters[] = { false, true };
91 static const char* gFilterNames[] = { "point", "bilinear" };
92
93 static const SkShader::TileMode gModes[] = { SkShader::kClamp_TileMode, SkShader::kRepeat_TileMode, SkShader::kMirror_TileMode };
94 static const char* gModeNames[] = { "C", "R", "M" };
95
96 SkScalar y = SkIntToScalar(24);
97 SkScalar x = SkIntToScalar(10);
98
99 SkPictureRecorder recorder;
100 SkCanvas* textCanvas = nullptr;
101 if (nullptr == fTextPicture) {
102 textCanvas = recorder.beginRecording(1000, 1000, nullptr, 0);
103 }
104
105 if (textCanvas) {
106 for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
107 for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
108 SkPaint p;
109 SkString str;
110 p.setAntiAlias(true);
111 p.setDither(true);
112 p.setLooper(fLooper);
113 str.printf("[%s,%s]", gModeNames[kx], gModeNames[ky]);
114
115 p.setTextAlign(SkPaint::kCenter_Align);
116 textCanvas->drawText(str.c_str(), str.size(), x + r.width()/2, y, p);
117
118 x += r.width() * 4 / 3;
119 }
120 }
121 }
122
123 y += SkIntToScalar(16);
124
125 for (size_t i = 0; i < SK_ARRAY_COUNT(gColorTypes); i++) {
126 for (size_t j = 0; j < SK_ARRAY_COUNT(gFilters); j++) {
127 x = SkIntToScalar(10);
128 for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
129 for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
130 SkPaint paint;
131 setup(&paint, fTexture[i], gFilters[j], gModes[kx], gModes[ky]);
132 paint.setDither(true);
133
134 canvas->save();
135 canvas->translate(x, y);
136 canvas->drawRect(r, paint);
137 canvas->restore();
138
139 x += r.width() * 4 / 3;
140 }
141 }
142 if (textCanvas) {
143 SkPaint p;
144 SkString str;
145 p.setAntiAlias(true);
146 p.setLooper(fLooper);
147 str.printf("%s, %s", gConfigNames[i], gFilterNames[j]);
148 textCanvas->drawText(str.c_str(), str.size(), x, y + r.height() * 2 / 3, p);
149 }
150
151 y += r.height() * 4 / 3;
152 }
153 }
154
155 if (textCanvas) {
156 SkASSERT(nullptr == fTextPicture);
157 fTextPicture.reset(recorder.endRecording());
158 }
159
160 SkASSERT(fTextPicture);
161 canvas->drawPicture(fTextPicture);
162 }
163
164 private:
165 typedef SampleView INHERITED;
166 };
167
168 //////////////////////////////////////////////////////////////////////////////
169
MyFactory()170 static SkView* MyFactory() { return new TilingView; }
171 static SkViewRegister reg(MyFactory);
172