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
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::CreateLinear(pts, colors, pos,
33                SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode))->unref();
34    canvas.drawPaint(paint);
35}
36
37static void setup(SkPaint* paint, const SkBitmap& bm, bool filter,
38                  SkShader::TileMode tmx, SkShader::TileMode tmy) {
39    SkShader* shader = SkShader::CreateBitmapShader(bm, tmx, tmy);
40    paint->setShader(shader)->unref();
41    paint->setFilterLevel(filter ? SkPaint::kLow_FilterLevel : SkPaint::kNone_FilterLevel);
42}
43
44static const SkColorType gColorTypes[] = {
45    kN32_SkColorType,
46    kRGB_565_SkColorType,
47};
48
49class TilingGM : public skiagm::GM {
50public:
51    TilingGM(bool powerOfTwoSize)
52            : fPowerOfTwoSize(powerOfTwoSize) {
53    }
54
55    SkBitmap    fTexture[SK_ARRAY_COUNT(gColorTypes)];
56
57protected:
58
59    enum {
60        kPOTSize = 32,
61        kNPOTSize = 21,
62    };
63
64    SkString onShortName() {
65        SkString name("tilemodes");
66        if (!fPowerOfTwoSize) {
67            name.append("_npot");
68        }
69        return name;
70    }
71
72    SkISize onISize() { return SkISize::Make(880, 560); }
73
74    virtual void onOnceBeforeDraw() SK_OVERRIDE {
75        int size = fPowerOfTwoSize ? kPOTSize : kNPOTSize;
76        for (size_t i = 0; i < SK_ARRAY_COUNT(gColorTypes); i++) {
77            makebm(&fTexture[i], gColorTypes[i], size, size);
78        }
79    }
80
81    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
82
83        int size = fPowerOfTwoSize ? kPOTSize : kNPOTSize;
84
85        SkRect r = { 0, 0, SkIntToScalar(size*2), SkIntToScalar(size*2) };
86
87        static const char* gConfigNames[] = { "8888", "565", "4444" };
88
89        static const bool           gFilters[] = { false, true };
90        static const char*          gFilterNames[] = {     "point",                     "bilinear" };
91
92        static const SkShader::TileMode gModes[] = { 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->drawText(str.c_str(), str.size(), 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->drawText(str.c_str(), str.size(), 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
158static const int gWidth = 32;
159static const int gHeight = 32;
160
161static SkShader* make_bm(SkShader::TileMode tx, SkShader::TileMode ty) {
162    SkBitmap bm;
163    makebm(&bm, kN32_SkColorType, gWidth, gHeight);
164    return SkShader::CreateBitmapShader(bm, tx, ty);
165}
166
167static 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, 0xFF0044FF };
172
173    int index = (int)ty;
174    switch (index % 3) {
175        case 0:
176            return SkGradientShader::CreateLinear(pts, colors, NULL, SK_ARRAY_COUNT(colors), tx);
177        case 1:
178            return SkGradientShader::CreateRadial(center, rad, colors, NULL, SK_ARRAY_COUNT(colors), tx);
179        case 2:
180            return SkGradientShader::CreateSweep(center.fX, center.fY, colors, NULL, SK_ARRAY_COUNT(colors));
181    }
182
183    return NULL;
184}
185
186typedef 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    virtual uint32_t onGetFlags() const SK_OVERRIDE {
198        return kSkipTiled_Flag;
199    }
200
201    SkString onShortName() {
202        return fName;
203    }
204
205    SkISize onISize() { return SkISize::Make(880, 560); }
206
207    virtual void onDraw(SkCanvas* canvas) {
208        canvas->scale(SkIntToScalar(3)/2, SkIntToScalar(3)/2);
209
210        const SkScalar w = SkIntToScalar(gWidth);
211        const SkScalar h = SkIntToScalar(gHeight);
212        SkRect r = { -w, -h, w*2, h*2 };
213
214        static const SkShader::TileMode gModes[] = {
215            SkShader::kClamp_TileMode, SkShader::kRepeat_TileMode, SkShader::kMirror_TileMode
216        };
217        static const char* gModeNames[] = {
218            "Clamp", "Repeat", "Mirror"
219        };
220
221        SkScalar y = SkIntToScalar(24);
222        SkScalar x = SkIntToScalar(66);
223
224        SkPaint p;
225        p.setAntiAlias(true);
226        sk_tool_utils::set_portable_typeface(&p);
227        p.setTextAlign(SkPaint::kCenter_Align);
228
229        for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
230            SkString str(gModeNames[kx]);
231            canvas->drawText(str.c_str(), str.size(), x + r.width()/2, y, p);
232            x += r.width() * 4 / 3;
233        }
234
235        y += SkIntToScalar(16) + h;
236        p.setTextAlign(SkPaint::kRight_Align);
237
238        for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
239            x = SkIntToScalar(16) + w;
240
241            SkString str(gModeNames[ky]);
242            canvas->drawText(str.c_str(), str.size(), x, y + h/2, p);
243
244            x += SkIntToScalar(50);
245            for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
246                SkPaint paint;
247                paint.setShader(fProc(gModes[kx], gModes[ky]))->unref();
248
249                canvas->save();
250                canvas->translate(x, y);
251                canvas->drawRect(r, paint);
252                canvas->restore();
253
254                x += r.width() * 4 / 3;
255            }
256            y += r.height() * 4 / 3;
257        }
258    }
259
260private:
261    typedef skiagm::GM INHERITED;
262};
263
264//////////////////////////////////////////////////////////////////////////////
265
266DEF_GM( return new TilingGM(true); )
267DEF_GM( return new TilingGM(false); )
268DEF_GM( return new Tiling2GM(make_bm, "bitmap"); )
269DEF_GM( return new Tiling2GM(make_grad, "gradient"); )
270