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, SkFilterQuality filter_level,
39                  SkShader::TileMode tmx, SkShader::TileMode tmy) {
40    SkShader* shader = SkShader::CreateBitmapShader(bm, tmx, tmy);
41    paint->setShader(shader)->unref();
42    paint->setFilterQuality(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    SkString onShortName() override {
69        SkString name("scaled_tilemodes");
70        if (!fPowerOfTwoSize) {
71            name.append("_npot");
72        }
73        return name;
74    }
75
76    SkISize onISize() override { return SkISize::Make(880, 760); }
77
78    void onOnceBeforeDraw() override {
79        int size = fPowerOfTwoSize ? kPOTSize : kNPOTSize;
80        for (size_t i = 0; i < SK_ARRAY_COUNT(gColorTypes); i++) {
81            makebm(&fTexture[i], gColorTypes[i], size, size);
82        }
83    }
84
85    void onDraw(SkCanvas* canvas) override {
86        float scale = 32.f/kPOTSize;
87
88        int size = fPowerOfTwoSize ? kPOTSize : kNPOTSize;
89
90        SkRect r = { 0, 0, SkIntToScalar(size*2), SkIntToScalar(size*2) };
91
92        static const char* gColorTypeNames[] = { "8888" , "565", "4444" };
93
94        static const SkFilterQuality gFilterQualitys[] =
95            { kNone_SkFilterQuality,
96              kLow_SkFilterQuality,
97              kMedium_SkFilterQuality,
98              kHigh_SkFilterQuality };
99        static const char* gFilterNames[] = { "None", "Low", "Medium", "High" };
100
101        static const SkShader::TileMode gModes[] = { SkShader::kClamp_TileMode, SkShader::kRepeat_TileMode, SkShader::kMirror_TileMode };
102        static const char*          gModeNames[] = {    "C",                    "R",                   "M" };
103
104        SkScalar y = SkIntToScalar(24);
105        SkScalar x = SkIntToScalar(10)/scale;
106
107        for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
108            for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
109                SkPaint p;
110                SkString str;
111                p.setAntiAlias(true);
112                sk_tool_utils::set_portable_typeface(&p);
113                p.setDither(true);
114                p.setLooper(fLooper);
115                str.printf("[%s,%s]", gModeNames[kx], gModeNames[ky]);
116
117                p.setTextAlign(SkPaint::kCenter_Align);
118                canvas->drawText(str.c_str(), str.size(), scale*(x + r.width()/2), y, p);
119
120                x += r.width() * 4 / 3;
121            }
122        }
123
124        y = SkIntToScalar(40) / scale;
125
126        for (size_t i = 0; i < SK_ARRAY_COUNT(gColorTypes); i++) {
127            for (size_t j = 0; j < SK_ARRAY_COUNT(gFilterQualitys); j++) {
128                x = SkIntToScalar(10)/scale;
129                for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
130                    for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
131                        SkPaint paint;
132#if 1 // Temporary change to regen bitmap before each draw. This may help tracking down an issue
133      // on SGX where resizing NPOT textures to POT textures exhibits a driver bug.
134                        if (!fPowerOfTwoSize) {
135                            makebm(&fTexture[i], gColorTypes[i], size, size);
136                        }
137#endif
138                        setup(&paint, fTexture[i], gFilterQualitys[j], gModes[kx], gModes[ky]);
139                        paint.setDither(true);
140
141                        canvas->save();
142                        canvas->scale(scale,scale);
143                        canvas->translate(x, y);
144                        canvas->drawRect(r, paint);
145                        canvas->restore();
146
147                        x += r.width() * 4 / 3;
148                    }
149                }
150                {
151                    SkPaint p;
152                    SkString str;
153                    p.setAntiAlias(true);
154                    sk_tool_utils::set_portable_typeface(&p);
155                    p.setLooper(fLooper);
156                    str.printf("%s, %s", gColorTypeNames[i], gFilterNames[j]);
157                    canvas->drawText(str.c_str(), str.size(), scale*x, scale*(y + r.height() * 2 / 3), p);
158                }
159
160                y += r.height() * 4 / 3;
161            }
162        }
163    }
164
165private:
166    bool fPowerOfTwoSize;
167    typedef skiagm::GM INHERITED;
168};
169
170static const int gWidth = 32;
171static const int gHeight = 32;
172
173static SkShader* make_bm(SkShader::TileMode tx, SkShader::TileMode ty) {
174    SkBitmap bm;
175    makebm(&bm, kN32_SkColorType, gWidth, gHeight);
176    return SkShader::CreateBitmapShader(bm, tx, ty);
177}
178
179static SkShader* make_grad(SkShader::TileMode tx, SkShader::TileMode ty) {
180    SkPoint pts[] = { { 0, 0 }, { SkIntToScalar(gWidth), SkIntToScalar(gHeight)} };
181    SkPoint center = { SkIntToScalar(gWidth)/2, SkIntToScalar(gHeight)/2 };
182    SkScalar rad = SkIntToScalar(gWidth)/2;
183    SkColor colors[] = { 0xFFFF0000, 0xFF0044FF };
184
185    int index = (int)ty;
186    switch (index % 3) {
187        case 0:
188            return SkGradientShader::CreateLinear(pts, colors, NULL, SK_ARRAY_COUNT(colors), tx);
189        case 1:
190            return SkGradientShader::CreateRadial(center, rad, colors, NULL, SK_ARRAY_COUNT(colors), tx);
191        case 2:
192            return SkGradientShader::CreateSweep(center.fX, center.fY, colors, NULL, SK_ARRAY_COUNT(colors));
193    }
194
195    return NULL;
196}
197
198typedef SkShader* (*ShaderProc)(SkShader::TileMode, SkShader::TileMode);
199
200class ScaledTiling2GM : public skiagm::GM {
201    ShaderProc fProc;
202    SkString   fName;
203public:
204    ScaledTiling2GM(ShaderProc proc, const char name[]) : fProc(proc) {
205        fName.printf("scaled_tilemode_%s", name);
206    }
207
208protected:
209
210    SkString onShortName() override {
211        return fName;
212    }
213
214    SkISize onISize() override { return SkISize::Make(880, 560); }
215
216    void onDraw(SkCanvas* canvas) override {
217        canvas->scale(SkIntToScalar(3)/2, SkIntToScalar(3)/2);
218
219        const SkScalar w = SkIntToScalar(gWidth);
220        const SkScalar h = SkIntToScalar(gHeight);
221        SkRect r = { -w, -h, w*2, h*2 };
222
223        static const SkShader::TileMode gModes[] = {
224            SkShader::kClamp_TileMode, SkShader::kRepeat_TileMode, SkShader::kMirror_TileMode
225        };
226        static const char* gModeNames[] = {
227            "Clamp", "Repeat", "Mirror"
228        };
229
230        SkScalar y = SkIntToScalar(24);
231        SkScalar x = SkIntToScalar(66);
232
233        SkPaint p;
234        p.setAntiAlias(true);
235        sk_tool_utils::set_portable_typeface(&p);
236        p.setTextAlign(SkPaint::kCenter_Align);
237
238        for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
239            SkString str(gModeNames[kx]);
240            canvas->drawText(str.c_str(), str.size(), x + r.width()/2, y, p);
241            x += r.width() * 4 / 3;
242        }
243
244        y += SkIntToScalar(16) + h;
245        p.setTextAlign(SkPaint::kRight_Align);
246
247        for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
248            x = SkIntToScalar(16) + w;
249
250            SkString str(gModeNames[ky]);
251            canvas->drawText(str.c_str(), str.size(), x, y + h/2, p);
252
253            x += SkIntToScalar(50);
254            for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
255                SkPaint paint;
256                paint.setShader(fProc(gModes[kx], gModes[ky]))->unref();
257
258                canvas->save();
259                canvas->translate(x, y);
260                canvas->drawRect(r, paint);
261                canvas->restore();
262
263                x += r.width() * 4 / 3;
264            }
265            y += r.height() * 4 / 3;
266        }
267    }
268
269private:
270    typedef skiagm::GM INHERITED;
271};
272
273//////////////////////////////////////////////////////////////////////////////
274
275DEF_GM( return new ScaledTilingGM(true); )
276DEF_GM( return new ScaledTilingGM(false); )
277DEF_GM( return new ScaledTiling2GM(make_bm, "bitmap"); )
278DEF_GM( return new ScaledTiling2GM(make_grad, "gradient"); )
279