SampleTiling.cpp revision ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976e 
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
26static 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
50static 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
57static const SkBitmap::Config gConfigs[] = {
58    SkBitmap::kARGB_8888_Config,
59    SkBitmap::kRGB_565_Config,
60    SkBitmap::kARGB_4444_Config
61};
62static const int gWidth = 32;
63static const int gHeight = 32;
64
65class TilingView : public SampleView {
66    SkPicture           fTextPicture;
67    SkBlurDrawLooper    fLooper;
68public:
69	TilingView()
70            : fLooper(SkIntToScalar(1), SkIntToScalar(2), SkIntToScalar(2),
71                      0x88000000) {
72        for (size_t i = 0; i < SK_ARRAY_COUNT(gConfigs); i++) {
73            makebm(&fTexture[i], gConfigs[i], gWidth, gHeight);
74        }
75    }
76
77    SkBitmap    fTexture[SK_ARRAY_COUNT(gConfigs)];
78
79protected:
80    // overrides from SkEventSink
81    virtual bool onQuery(SkEvent* evt) {
82        if (SampleCode::TitleQ(*evt)) {
83            SampleCode::TitleR(evt, "Tiling");
84            return true;
85        }
86        return this->INHERITED::onQuery(evt);
87    }
88
89    virtual void onDrawContent(SkCanvas* canvas) {
90        SkRect r = { 0, 0, SkIntToScalar(gWidth*2), SkIntToScalar(gHeight*2) };
91
92        static const char* gConfigNames[] = { "8888", "565", "4444" };
93
94        static const bool           gFilters[] = { false, true };
95        static const char*          gFilterNames[] = {     "point",                     "bilinear" };
96
97        static const SkShader::TileMode gModes[] = { SkShader::kClamp_TileMode, SkShader::kRepeat_TileMode, SkShader::kMirror_TileMode };
98        static const char*          gModeNames[] = {    "C",                    "R",                   "M" };
99
100        SkScalar y = SkIntToScalar(24);
101        SkScalar x = SkIntToScalar(10);
102
103        SkCanvas* textCanvas = NULL;
104        if (fTextPicture.width() == 0) {
105            textCanvas = fTextPicture.beginRecording(1000, 1000);
106        }
107
108        if (textCanvas) {
109            for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
110                for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
111                    SkPaint p;
112                    SkString str;
113                    p.setAntiAlias(true);
114                    p.setDither(true);
115                    p.setLooper(&fLooper);
116                    str.printf("[%s,%s]", gModeNames[kx], gModeNames[ky]);
117
118                    p.setTextAlign(SkPaint::kCenter_Align);
119                    textCanvas->drawText(str.c_str(), str.size(), x + r.width()/2, y, p);
120
121                    x += r.width() * 4 / 3;
122                }
123            }
124        }
125
126        y += SkIntToScalar(16);
127
128        for (size_t i = 0; i < SK_ARRAY_COUNT(gConfigs); i++) {
129            for (size_t j = 0; j < SK_ARRAY_COUNT(gFilters); j++) {
130                x = SkIntToScalar(10);
131                for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
132                    for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
133                        SkPaint paint;
134                        setup(&paint, fTexture[i], gFilters[j], gModes[kx], gModes[ky]);
135                        paint.setDither(true);
136
137                        canvas->save();
138                        canvas->translate(x, y);
139                        canvas->drawRect(r, paint);
140                        canvas->restore();
141
142                        x += r.width() * 4 / 3;
143                    }
144                }
145                if (textCanvas) {
146                    SkPaint p;
147                    SkString str;
148                    p.setAntiAlias(true);
149                    p.setLooper(&fLooper);
150                    str.printf("%s, %s", gConfigNames[i], gFilterNames[j]);
151                    textCanvas->drawText(str.c_str(), str.size(), x, y + r.height() * 2 / 3, p);
152                }
153
154                y += r.height() * 4 / 3;
155            }
156        }
157
158        canvas->drawPicture(fTextPicture);
159    }
160
161private:
162    typedef SampleView INHERITED;
163};
164
165//////////////////////////////////////////////////////////////////////////////
166
167static SkView* MyFactory() { return new TilingView; }
168static SkViewRegister reg(MyFactory);
169
170