1/*
2 * Copyright 2011 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7#include "gm.h"
8#include "sk_tool_utils.h"
9#include "SkColorFilter.h"
10#include "SkMaskFilter.h"
11#include "SkPath.h"
12#include "SkRegion.h"
13#include "SkShader.h"
14#include "SkUtils.h"
15
16
17// effects
18#include "SkGradientShader.h"
19#include "SkBlurDrawLooper.h"
20
21static void makebm(SkBitmap* bm, SkColorType ct, int w, int h) {
22    bm->allocPixels(SkImageInfo::Make(w, h, ct, kPremul_SkAlphaType));
23    bm->eraseColor(SK_ColorTRANSPARENT);
24
25    SkCanvas    canvas(*bm);
26    SkPoint     pts[] = { { 0, 0 }, { SkIntToScalar(w), SkIntToScalar(h)} };
27    SkColor     colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE };
28    SkScalar    pos[] = { 0, SK_Scalar1/2, SK_Scalar1 };
29    SkPaint     paint;
30
31    paint.setDither(true);
32    paint.setShader(SkGradientShader::MakeLinear(pts, colors, pos, SK_ARRAY_COUNT(colors),
33                                                 SkShader::kClamp_TileMode));
34    canvas.drawPaint(paint);
35}
36
37static void setup(SkPaint* paint, const SkBitmap& bm, bool filter,
38                  SkShader::TileMode tmx, SkShader::TileMode tmy) {
39    paint->setShader(SkShader::MakeBitmapShader(bm, tmx, tmy));
40    paint->setFilterQuality(filter ? kLow_SkFilterQuality : kNone_SkFilterQuality);
41}
42
43constexpr SkColorType gColorTypes[] = {
44    kN32_SkColorType,
45    kRGB_565_SkColorType,
46};
47
48class TilingGM : public skiagm::GM {
49public:
50    TilingGM(bool powerOfTwoSize)
51            : fPowerOfTwoSize(powerOfTwoSize) {
52    }
53
54    SkBitmap    fTexture[SK_ARRAY_COUNT(gColorTypes)];
55
56protected:
57
58    enum {
59        kPOTSize = 32,
60        kNPOTSize = 21,
61    };
62
63    SkString onShortName() override {
64        SkString name("tilemodes");
65        if (!fPowerOfTwoSize) {
66            name.append("_npot");
67        }
68        return name;
69    }
70
71    SkISize onISize() override { return SkISize::Make(880, 560); }
72
73    void onOnceBeforeDraw() override {
74        int size = fPowerOfTwoSize ? kPOTSize : kNPOTSize;
75        for (size_t i = 0; i < SK_ARRAY_COUNT(gColorTypes); i++) {
76            makebm(&fTexture[i], gColorTypes[i], size, size);
77        }
78    }
79
80    void onDraw(SkCanvas* canvas) override {
81
82        int size = fPowerOfTwoSize ? kPOTSize : kNPOTSize;
83
84        SkRect r = { 0, 0, SkIntToScalar(size*2), SkIntToScalar(size*2) };
85
86        const char* gConfigNames[] = { "8888", "565", "4444" };
87
88        constexpr bool gFilters[] = { false, true };
89        static const char* gFilterNames[] = { "point", "bilinear" };
90
91        constexpr SkShader::TileMode gModes[] = {
92            SkShader::kClamp_TileMode, SkShader::kRepeat_TileMode, SkShader::kMirror_TileMode };
93        static const char* gModeNames[] = { "C", "R", "M" };
94
95        SkScalar y = SkIntToScalar(24);
96        SkScalar x = SkIntToScalar(10);
97
98        for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
99            for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
100                SkPaint p;
101                SkString str;
102                p.setAntiAlias(true);
103                sk_tool_utils::set_portable_typeface(&p);
104                p.setDither(true);
105                str.printf("[%s,%s]", gModeNames[kx], gModeNames[ky]);
106
107                p.setTextAlign(SkPaint::kCenter_Align);
108                canvas->drawString(str, x + r.width()/2, y, p);
109
110                x += r.width() * 4 / 3;
111            }
112        }
113
114        y += SkIntToScalar(16);
115
116        for (size_t i = 0; i < SK_ARRAY_COUNT(gColorTypes); i++) {
117            for (size_t j = 0; j < SK_ARRAY_COUNT(gFilters); j++) {
118                x = SkIntToScalar(10);
119                for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
120                    for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
121                        SkPaint paint;
122#if 1 // Temporary change to regen bitmap before each draw. This may help tracking down an issue
123      // on SGX where resizing NPOT textures to POT textures exhibits a driver bug.
124                        if (!fPowerOfTwoSize) {
125                            makebm(&fTexture[i], gColorTypes[i], size, size);
126                        }
127#endif
128                        setup(&paint, fTexture[i], gFilters[j], gModes[kx], gModes[ky]);
129                        paint.setDither(true);
130
131                        canvas->save();
132                        canvas->translate(x, y);
133                        canvas->drawRect(r, paint);
134                        canvas->restore();
135
136                        x += r.width() * 4 / 3;
137                    }
138                }
139                {
140                    SkPaint p;
141                    SkString str;
142                    p.setAntiAlias(true);
143                    sk_tool_utils::set_portable_typeface(&p);
144                    str.printf("%s, %s", gConfigNames[i], gFilterNames[j]);
145                    canvas->drawString(str, x, y + r.height() * 2 / 3, p);
146                }
147
148                y += r.height() * 4 / 3;
149            }
150        }
151    }
152
153private:
154    bool fPowerOfTwoSize;
155    typedef skiagm::GM INHERITED;
156};
157
158constexpr int gWidth = 32;
159constexpr int gHeight = 32;
160
161static sk_sp<SkShader> make_bm(SkShader::TileMode tx, SkShader::TileMode ty) {
162    SkBitmap bm;
163    makebm(&bm, kN32_SkColorType, gWidth, gHeight);
164    return SkShader::MakeBitmapShader(bm, tx, ty);
165}
166
167static sk_sp<SkShader> make_grad(SkShader::TileMode tx, SkShader::TileMode ty) {
168    SkPoint pts[] = { { 0, 0 }, { SkIntToScalar(gWidth), SkIntToScalar(gHeight)} };
169    SkPoint center = { SkIntToScalar(gWidth)/2, SkIntToScalar(gHeight)/2 };
170    SkScalar rad = SkIntToScalar(gWidth)/2;
171    SkColor colors[] = { 0xFFFF0000, sk_tool_utils::color_to_565(0xFF0044FF) };
172
173    int index = (int)ty;
174    switch (index % 3) {
175        case 0:
176            return SkGradientShader::MakeLinear(pts, colors, nullptr, SK_ARRAY_COUNT(colors), tx);
177        case 1:
178            return SkGradientShader::MakeRadial(center, rad, colors, nullptr, SK_ARRAY_COUNT(colors), tx);
179        case 2:
180            return SkGradientShader::MakeSweep(center.fX, center.fY, colors, nullptr,
181                                               SK_ARRAY_COUNT(colors), tx, 135, 225, 0, nullptr);
182    }
183    return nullptr;
184}
185
186typedef sk_sp<SkShader> (*ShaderProc)(SkShader::TileMode, SkShader::TileMode);
187
188class Tiling2GM : public skiagm::GM {
189    ShaderProc fProc;
190    SkString   fName;
191public:
192    Tiling2GM(ShaderProc proc, const char name[]) : fProc(proc) {
193        fName.printf("tilemode_%s", name);
194    }
195
196protected:
197
198    SkString onShortName() override {
199        return fName;
200    }
201
202    SkISize onISize() override { return SkISize::Make(650, 610); }
203
204    void onDraw(SkCanvas* canvas) override {
205        canvas->scale(SkIntToScalar(3)/2, SkIntToScalar(3)/2);
206
207        const SkScalar w = SkIntToScalar(gWidth);
208        const SkScalar h = SkIntToScalar(gHeight);
209        SkRect r = { -w, -h, w*2, h*2 };
210
211        constexpr SkShader::TileMode gModes[] = {
212            SkShader::kClamp_TileMode, SkShader::kRepeat_TileMode, SkShader::kMirror_TileMode
213        };
214        const char* gModeNames[] = {
215            "Clamp", "Repeat", "Mirror"
216        };
217
218        SkScalar y = SkIntToScalar(24);
219        SkScalar x = SkIntToScalar(66);
220
221        SkPaint p;
222        p.setAntiAlias(true);
223        sk_tool_utils::set_portable_typeface(&p);
224        p.setTextAlign(SkPaint::kCenter_Align);
225
226        for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
227            SkString str(gModeNames[kx]);
228            canvas->drawString(str, x + r.width()/2, y, p);
229            x += r.width() * 4 / 3;
230        }
231
232        y += SkIntToScalar(16) + h;
233        p.setTextAlign(SkPaint::kRight_Align);
234
235        for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
236            x = SkIntToScalar(16) + w;
237
238            SkString str(gModeNames[ky]);
239            canvas->drawString(str, x, y + h/2, p);
240
241            x += SkIntToScalar(50);
242            for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
243                SkPaint paint;
244                paint.setShader(fProc(gModes[kx], gModes[ky]));
245
246                canvas->save();
247                canvas->translate(x, y);
248                canvas->drawRect(r, paint);
249                canvas->restore();
250
251                x += r.width() * 4 / 3;
252            }
253            y += r.height() * 4 / 3;
254        }
255    }
256
257private:
258    typedef skiagm::GM INHERITED;
259};
260
261//////////////////////////////////////////////////////////////////////////////
262
263DEF_GM( return new TilingGM(true); )
264DEF_GM( return new TilingGM(false); )
265DEF_GM( return new Tiling2GM(make_bm, "bitmap"); )
266DEF_GM( return new Tiling2GM(make_grad, "gradient"); )
267