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
27static 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
43static 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->setFilterLevel(filter ? SkPaint::kLow_FilterLevel : SkPaint::kNone_FilterLevel);
48}
49
50static const SkColorType gColorTypes[] = {
51    kN32_SkColorType,
52    kRGB_565_SkColorType,
53};
54static const int gWidth = 32;
55static const int gHeight = 32;
56
57class TilingView : public SampleView {
58    SkAutoTUnref<SkPicture>        fTextPicture;
59    SkAutoTUnref<SkBlurDrawLooper> fLooper;
60public:
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
70    virtual ~TilingView() {
71    }
72
73    SkBitmap    fTexture[SK_ARRAY_COUNT(gColorTypes)];
74
75protected:
76    // overrides from SkEventSink
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
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 = NULL;
101        if (NULL == fTextPicture) {
102            textCanvas = recorder.beginRecording(1000, 1000, NULL, 0);
103        }
104
105        if (NULL != 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 (NULL != 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 (NULL != textCanvas) {
156            SkASSERT(NULL == fTextPicture);
157            fTextPicture.reset(recorder.endRecording());
158        }
159
160        SkASSERT(NULL != fTextPicture);
161        canvas->drawPicture(fTextPicture);
162    }
163
164private:
165    typedef SampleView INHERITED;
166};
167
168//////////////////////////////////////////////////////////////////////////////
169
170static SkView* MyFactory() { return new TilingView; }
171static SkViewRegister reg(MyFactory);
172