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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 
makebm(SkBitmap * bm,SkColorType ct,int w,int h)21 static 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 
setup(SkPaint * paint,const SkBitmap & bm,bool filter,SkShader::TileMode tmx,SkShader::TileMode tmy)37 static 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->setFilterQuality(filter ? kLow_SkFilterQuality : kNone_SkFilterQuality);
42 }
43 
44 static const SkColorType gColorTypes[] = {
45     kN32_SkColorType,
46     kRGB_565_SkColorType,
47 };
48 
49 class TilingGM : public skiagm::GM {
50 public:
TilingGM(bool powerOfTwoSize)51     TilingGM(bool powerOfTwoSize)
52             : fPowerOfTwoSize(powerOfTwoSize) {
53     }
54 
55     SkBitmap    fTexture[SK_ARRAY_COUNT(gColorTypes)];
56 
57 protected:
58 
59     enum {
60         kPOTSize = 32,
61         kNPOTSize = 21,
62     };
63 
onShortName()64     SkString onShortName() override {
65         SkString name("tilemodes");
66         if (!fPowerOfTwoSize) {
67             name.append("_npot");
68         }
69         return name;
70     }
71 
onISize()72     SkISize onISize() override { return SkISize::Make(880, 560); }
73 
onOnceBeforeDraw()74     void onOnceBeforeDraw() 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 
onDraw(SkCanvas * canvas)81     void onDraw(SkCanvas* canvas) 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 
153 private:
154     bool fPowerOfTwoSize;
155     typedef skiagm::GM INHERITED;
156 };
157 
158 static const int gWidth = 32;
159 static const int gHeight = 32;
160 
make_bm(SkShader::TileMode tx,SkShader::TileMode ty)161 static 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 
make_grad(SkShader::TileMode tx,SkShader::TileMode ty)167 static 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 
186 typedef SkShader* (*ShaderProc)(SkShader::TileMode, SkShader::TileMode);
187 
188 class Tiling2GM : public skiagm::GM {
189     ShaderProc fProc;
190     SkString   fName;
191 public:
Tiling2GM(ShaderProc proc,const char name[])192     Tiling2GM(ShaderProc proc, const char name[]) : fProc(proc) {
193         fName.printf("tilemode_%s", name);
194     }
195 
196 protected:
197 
onShortName()198     SkString onShortName() override {
199         return fName;
200     }
201 
onISize()202     SkISize onISize() override { return SkISize::Make(880, 560); }
203 
onDraw(SkCanvas * canvas)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         static const SkShader::TileMode gModes[] = {
212             SkShader::kClamp_TileMode, SkShader::kRepeat_TileMode, SkShader::kMirror_TileMode
213         };
214         static 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->drawText(str.c_str(), str.size(), 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->drawText(str.c_str(), str.size(), 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]))->unref();
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 
257 private:
258     typedef skiagm::GM INHERITED;
259 };
260 
261 //////////////////////////////////////////////////////////////////////////////
262 
263 DEF_GM( return new TilingGM(true); )
264 DEF_GM( return new TilingGM(false); )
265 DEF_GM( return new Tiling2GM(make_bm, "bitmap"); )
266 DEF_GM( return new Tiling2GM(make_grad, "gradient"); )
267