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 "gm.h"
9#include "SkPath.h"
10#include "SkRegion.h"
11#include "SkShader.h"
12#include "SkUtils.h"
13#include "SkColorPriv.h"
14#include "SkColorFilter.h"
15#include "SkTypeface.h"
16#include "SkBlurMask.h"
17
18// effects
19#include "SkGradientShader.h"
20#include "SkBlurDrawLooper.h"
21
22static void makebm(SkBitmap* bm, SkColorType ct, int w, int h) {
23    bm->allocPixels(SkImageInfo::Make(w, h, ct, kPremul_SkAlphaType));
24    bm->eraseColor(SK_ColorTRANSPARENT);
25
26    SkCanvas    canvas(*bm);
27    SkPoint     pts[] = { { 0, 0 }, { SkIntToScalar(w), SkIntToScalar(h)} };
28    SkColor     colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE };
29    SkScalar    pos[] = { 0, SK_Scalar1/2, SK_Scalar1 };
30    SkPaint     paint;
31
32    paint.setDither(true);
33    paint.setShader(SkGradientShader::CreateLinear(pts, colors, pos,
34                SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode))->unref();
35    canvas.drawPaint(paint);
36}
37
38static void setup(SkPaint* paint, const SkBitmap& bm, SkPaint::FilterLevel filter_level,
39                  SkShader::TileMode tmx, SkShader::TileMode tmy) {
40    SkShader* shader = SkShader::CreateBitmapShader(bm, tmx, tmy);
41    paint->setShader(shader)->unref();
42    paint->setFilterLevel(filter_level);
43}
44
45static const SkColorType gColorTypes[] = {
46    kN32_SkColorType,
47    kRGB_565_SkColorType,
48};
49
50class ScaledTilingGM : public skiagm::GM {
51    SkAutoTUnref<SkBlurDrawLooper> fLooper;
52public:
53    ScaledTilingGM(bool powerOfTwoSize)
54            : fLooper(SkBlurDrawLooper::Create(0x88000000,
55                                               SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(1)),
56                                               SkIntToScalar(2), SkIntToScalar(2)))
57            , fPowerOfTwoSize(powerOfTwoSize) {
58    }
59
60    SkBitmap    fTexture[SK_ARRAY_COUNT(gColorTypes)];
61
62protected:
63    enum {
64        kPOTSize = 4,
65        kNPOTSize = 3,
66    };
67
68    virtual uint32_t onGetFlags() const SK_OVERRIDE {
69        if (!fPowerOfTwoSize) {
70            return kSkipTiled_Flag;  // Only for 565.  8888 is fine.
71        }
72        return 0;
73    }
74
75    SkString onShortName() {
76        SkString name("scaled_tilemodes");
77        if (!fPowerOfTwoSize) {
78            name.append("_npot");
79        }
80        return name;
81    }
82
83    SkISize onISize() { return SkISize::Make(880, 760); }
84
85    virtual void onOnceBeforeDraw() SK_OVERRIDE {
86        int size = fPowerOfTwoSize ? kPOTSize : kNPOTSize;
87        for (size_t i = 0; i < SK_ARRAY_COUNT(gColorTypes); i++) {
88            makebm(&fTexture[i], gColorTypes[i], size, size);
89        }
90    }
91
92    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
93
94        float scale = 32.f/kPOTSize;
95
96        int size = fPowerOfTwoSize ? kPOTSize : kNPOTSize;
97
98        SkRect r = { 0, 0, SkIntToScalar(size*2), SkIntToScalar(size*2) };
99
100        static const char* gColorTypeNames[] = { "8888" , "565", "4444" };
101
102        static const SkPaint::FilterLevel           gFilterLevels[] =
103            { SkPaint::kNone_FilterLevel,
104              SkPaint::kLow_FilterLevel,
105              SkPaint::kMedium_FilterLevel,
106              SkPaint::kHigh_FilterLevel };
107        static const char*          gFilterNames[] = { "None", "Low", "Medium", "High" };
108
109        static const SkShader::TileMode gModes[] = { SkShader::kClamp_TileMode, SkShader::kRepeat_TileMode, SkShader::kMirror_TileMode };
110        static const char*          gModeNames[] = {    "C",                    "R",                   "M" };
111
112        SkScalar y = SkIntToScalar(24);
113        SkScalar x = SkIntToScalar(10)/scale;
114
115        for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
116            for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
117                SkPaint p;
118                SkString str;
119                p.setAntiAlias(true);
120                p.setDither(true);
121                p.setLooper(fLooper);
122                str.printf("[%s,%s]", gModeNames[kx], gModeNames[ky]);
123
124                p.setTextAlign(SkPaint::kCenter_Align);
125                canvas->drawText(str.c_str(), str.size(), scale*(x + r.width()/2), y, p);
126
127                x += r.width() * 4 / 3;
128            }
129        }
130
131        y = SkIntToScalar(40) / scale;
132
133        for (size_t i = 0; i < SK_ARRAY_COUNT(gColorTypes); i++) {
134            for (size_t j = 0; j < SK_ARRAY_COUNT(gFilterLevels); j++) {
135                x = SkIntToScalar(10)/scale;
136                for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
137                    for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
138                        SkPaint paint;
139#if 1 // Temporary change to regen bitmap before each draw. This may help tracking down an issue
140      // on SGX where resizing NPOT textures to POT textures exhibits a driver bug.
141                        if (!fPowerOfTwoSize) {
142                            makebm(&fTexture[i], gColorTypes[i], size, size);
143                        }
144#endif
145                        setup(&paint, fTexture[i], gFilterLevels[j], gModes[kx], gModes[ky]);
146                        paint.setDither(true);
147
148                        canvas->save();
149                        canvas->scale(scale,scale);
150                        canvas->translate(x, y);
151                        canvas->drawRect(r, paint);
152                        canvas->restore();
153
154                        x += r.width() * 4 / 3;
155                    }
156                }
157                {
158                    SkPaint p;
159                    SkString str;
160                    p.setAntiAlias(true);
161                    p.setLooper(fLooper);
162                    str.printf("%s, %s", gColorTypeNames[i], gFilterNames[j]);
163                    canvas->drawText(str.c_str(), str.size(), scale*x, scale*(y + r.height() * 2 / 3), p);
164                }
165
166                y += r.height() * 4 / 3;
167            }
168        }
169    }
170
171private:
172    bool fPowerOfTwoSize;
173    typedef skiagm::GM INHERITED;
174};
175
176static const int gWidth = 32;
177static const int gHeight = 32;
178
179static SkShader* make_bm(SkShader::TileMode tx, SkShader::TileMode ty) {
180    SkBitmap bm;
181    makebm(&bm, kN32_SkColorType, gWidth, gHeight);
182    return SkShader::CreateBitmapShader(bm, tx, ty);
183}
184
185static SkShader* make_grad(SkShader::TileMode tx, SkShader::TileMode ty) {
186    SkPoint pts[] = { { 0, 0 }, { SkIntToScalar(gWidth), SkIntToScalar(gHeight)} };
187    SkPoint center = { SkIntToScalar(gWidth)/2, SkIntToScalar(gHeight)/2 };
188    SkScalar rad = SkIntToScalar(gWidth)/2;
189    SkColor colors[] = { 0xFFFF0000, 0xFF0044FF };
190
191    int index = (int)ty;
192    switch (index % 3) {
193        case 0:
194            return SkGradientShader::CreateLinear(pts, colors, NULL, SK_ARRAY_COUNT(colors), tx);
195        case 1:
196            return SkGradientShader::CreateRadial(center, rad, colors, NULL, SK_ARRAY_COUNT(colors), tx);
197        case 2:
198            return SkGradientShader::CreateSweep(center.fX, center.fY, colors, NULL, SK_ARRAY_COUNT(colors));
199    }
200
201    return NULL;
202}
203
204typedef SkShader* (*ShaderProc)(SkShader::TileMode, SkShader::TileMode);
205
206class ScaledTiling2GM : public skiagm::GM {
207    ShaderProc fProc;
208    SkString   fName;
209public:
210    ScaledTiling2GM(ShaderProc proc, const char name[]) : fProc(proc) {
211        fName.printf("scaled_tilemode_%s", name);
212    }
213
214protected:
215    virtual uint32_t onGetFlags() const SK_OVERRIDE {
216        return kSkipTiled_Flag;
217    }
218
219    SkString onShortName() {
220        return fName;
221    }
222
223    SkISize onISize() { return SkISize::Make(880, 560); }
224
225    virtual void onDraw(SkCanvas* canvas) {
226        canvas->scale(SkIntToScalar(3)/2, SkIntToScalar(3)/2);
227
228        const SkScalar w = SkIntToScalar(gWidth);
229        const SkScalar h = SkIntToScalar(gHeight);
230        SkRect r = { -w, -h, w*2, h*2 };
231
232        static const SkShader::TileMode gModes[] = {
233            SkShader::kClamp_TileMode, SkShader::kRepeat_TileMode, SkShader::kMirror_TileMode
234        };
235        static const char* gModeNames[] = {
236            "Clamp", "Repeat", "Mirror"
237        };
238
239        SkScalar y = SkIntToScalar(24);
240        SkScalar x = SkIntToScalar(66);
241
242        SkPaint p;
243        p.setAntiAlias(true);
244        p.setTextAlign(SkPaint::kCenter_Align);
245
246        for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
247            SkString str(gModeNames[kx]);
248            canvas->drawText(str.c_str(), str.size(), x + r.width()/2, y, p);
249            x += r.width() * 4 / 3;
250        }
251
252        y += SkIntToScalar(16) + h;
253        p.setTextAlign(SkPaint::kRight_Align);
254
255        for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
256            x = SkIntToScalar(16) + w;
257
258            SkString str(gModeNames[ky]);
259            canvas->drawText(str.c_str(), str.size(), x, y + h/2, p);
260
261            x += SkIntToScalar(50);
262            for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
263                SkPaint paint;
264                paint.setShader(fProc(gModes[kx], gModes[ky]))->unref();
265
266                canvas->save();
267                canvas->translate(x, y);
268                canvas->drawRect(r, paint);
269                canvas->restore();
270
271                x += r.width() * 4 / 3;
272            }
273            y += r.height() * 4 / 3;
274        }
275    }
276
277private:
278    typedef skiagm::GM INHERITED;
279};
280
281//////////////////////////////////////////////////////////////////////////////
282
283DEF_GM( return new ScaledTilingGM(true); )
284DEF_GM( return new ScaledTilingGM(false); )
285DEF_GM( return new ScaledTiling2GM(make_bm, "bitmap"); )
286DEF_GM( return new ScaledTiling2GM(make_grad, "gradient"); )
287