SampleTiling.cpp revision da342a891779e0839a645d6634a2f0100bf2c0d6 
1#include "SampleCode.h"
2#include "SkView.h"
3#include "SkCanvas.h"
4#include "SkPaint.h"
5#include "SkPath.h"
6#include "SkRegion.h"
7#include "SkShader.h"
8#include "SkUtils.h"
9#include "SkColorPriv.h"
10#include "SkColorFilter.h"
11#include "SkTypeface.h"
12
13// effects
14#include "SkGradientShader.h"
15#include "SkUnitMappers.h"
16#include "SkBlurDrawLooper.h"
17
18static void makebm(SkBitmap* bm, SkBitmap::Config config, int w, int h) {
19    bm->setConfig(config, w, h);
20    bm->allocPixels();
21    bm->eraseColor(0);
22
23    SkCanvas    canvas(*bm);
24    SkPoint     pts[] = { 0, 0, SkIntToScalar(w), SkIntToScalar(h) };
25    SkColor     colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE };
26    SkScalar    pos[] = { 0, SK_Scalar1/2, SK_Scalar1 };
27    SkPaint     paint;
28
29    SkUnitMapper*   um = NULL;
30
31    um = new SkCosineMapper;
32//    um = new SkDiscreteMapper(12);
33
34    SkAutoUnref au(um);
35
36    paint.setDither(true);
37    paint.setShader(SkGradientShader::CreateLinear(pts, colors, pos,
38                SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode, um))->unref();
39    canvas.drawPaint(paint);
40}
41
42static void setup(SkPaint* paint, const SkBitmap& bm, bool filter,
43                  SkShader::TileMode tmx, SkShader::TileMode tmy) {
44    SkShader* shader = SkShader::CreateBitmapShader(bm, tmx, tmy);
45    paint->setShader(shader)->unref();
46    paint->setFilterBitmap(filter);
47}
48
49static const SkBitmap::Config gConfigs[] = {
50    SkBitmap::kARGB_8888_Config,
51    SkBitmap::kRGB_565_Config,
52    SkBitmap::kARGB_4444_Config
53};
54static const int gWidth = 32;
55static const int gHeight = 32;
56
57class TilingView : public SkView {
58    SkBlurDrawLooper    fLooper;
59public:
60	TilingView()
61            : fLooper(SkIntToScalar(1), SkIntToScalar(2), SkIntToScalar(2),
62                      0x88000000) {
63        for (int i = 0; i < SK_ARRAY_COUNT(gConfigs); i++) {
64            makebm(&fTexture[i], gConfigs[i], gWidth, gHeight);
65        }
66    }
67
68    SkBitmap    fTexture[SK_ARRAY_COUNT(gConfigs)];
69
70protected:
71    // overrides from SkEventSink
72    virtual bool onQuery(SkEvent* evt) {
73        if (SampleCode::TitleQ(*evt)) {
74            SampleCode::TitleR(evt, "Tiling");
75            return true;
76        }
77        return this->INHERITED::onQuery(evt);
78    }
79
80    void drawBG(SkCanvas* canvas) {
81        canvas->drawColor(SK_ColorWHITE);
82    }
83
84    virtual void onDraw(SkCanvas* canvas) {
85        this->drawBG(canvas);
86
87        SkRect r = { 0, 0, SkIntToScalar(gWidth*2), SkIntToScalar(gHeight*2) };
88
89        static const char* gConfigNames[] = { "8888", "565", "4444" };
90
91        static const bool           gFilters[] = { false, true };
92        static const char*          gFilterNames[] = {     "point",                     "bilinear" };
93
94        static const SkShader::TileMode gModes[] = { SkShader::kClamp_TileMode, SkShader::kRepeat_TileMode, SkShader::kMirror_TileMode };
95        static const char*          gModeNames[] = {    "C",                    "R",                   "M" };
96
97        SkScalar y = SkIntToScalar(24);
98        SkScalar x = SkIntToScalar(10);
99
100        for (int kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
101            for (int ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
102                SkPaint p;
103                SkString str;
104                p.setAntiAlias(true);
105                p.setDither(true);
106                p.setLooper(&fLooper);
107                str.printf("[%s,%s]", gModeNames[kx], gModeNames[ky]);
108
109                p.setTextAlign(SkPaint::kCenter_Align);
110                canvas->drawText(str.c_str(), str.size(), x + r.width()/2, y, p);
111
112                x += r.width() * 4 / 3;
113            }
114        }
115
116        y += SkIntToScalar(16);
117
118        for (int i = 0; i < SK_ARRAY_COUNT(gConfigs); i++) {
119            for (int j = 0; j < SK_ARRAY_COUNT(gFilters); j++) {
120                x = SkIntToScalar(10);
121                for (int kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
122                    for (int ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
123                        SkPaint paint;
124                        setup(&paint, fTexture[i], gFilters[j], gModes[kx], gModes[ky]);
125                        paint.setDither(true);
126
127                        canvas->save();
128                        canvas->translate(x, y);
129                        canvas->drawRect(r, paint);
130                        canvas->restore();
131
132                        x += r.width() * 4 / 3;
133                    }
134                }
135                {
136                    SkPaint p;
137                    SkString str;
138                    p.setAntiAlias(true);
139                    p.setLooper(&fLooper);
140                    str.printf("%s, %s", gConfigNames[i], gFilterNames[j]);
141                    canvas->drawText(str.c_str(), str.size(), x, y + r.height() * 2 / 3, p);
142                }
143
144                y += r.height() * 4 / 3;
145            }
146        }
147
148    #ifdef SK_RELEASE
149        this->inval(NULL);
150    #endif
151    }
152
153    virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) {
154        this->inval(NULL);
155        return this->INHERITED::onFindClickHandler(x, y);
156    }
157
158    virtual bool onClick(Click* click) {
159        return this->INHERITED::onClick(click);
160    }
161
162private:
163    typedef SkView INHERITED;
164};
165
166//////////////////////////////////////////////////////////////////////////////
167
168static SkView* MyFactory() { return new TilingView; }
169static SkViewRegister reg(MyFactory);
170
171