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 "SkUnitMappers.h"
20 #include "SkBlurDrawLooper.h"
21
makebm(SkBitmap * bm,SkBitmap::Config config,int w,int h)22 static void makebm(SkBitmap* bm, SkBitmap::Config config, int w, int h) {
23 bm->setConfig(config, w, h);
24 bm->allocPixels();
25 bm->eraseColor(SK_ColorTRANSPARENT);
26
27 SkCanvas canvas(*bm);
28 SkPoint pts[] = { { 0, 0 }, { SkIntToScalar(w), SkIntToScalar(h)} };
29 SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE };
30 SkScalar pos[] = { 0, SK_Scalar1/2, SK_Scalar1 };
31 SkPaint paint;
32
33 SkUnitMapper* um = NULL;
34
35 um = new SkCosineMapper;
36 // um = new SkDiscreteMapper(12);
37
38 SkAutoUnref au(um);
39
40 paint.setDither(true);
41 paint.setShader(SkGradientShader::CreateLinear(pts, colors, pos,
42 SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode, um))->unref();
43 canvas.drawPaint(paint);
44 }
45
setup(SkPaint * paint,const SkBitmap & bm,bool filter,SkShader::TileMode tmx,SkShader::TileMode tmy)46 static void setup(SkPaint* paint, const SkBitmap& bm, bool filter,
47 SkShader::TileMode tmx, SkShader::TileMode tmy) {
48 SkShader* shader = SkShader::CreateBitmapShader(bm, tmx, tmy);
49 paint->setShader(shader)->unref();
50 paint->setFilterLevel(filter ? SkPaint::kLow_FilterLevel : SkPaint::kNone_FilterLevel);
51 }
52
53 static const SkBitmap::Config gConfigs[] = {
54 SkBitmap::kARGB_8888_Config,
55 SkBitmap::kRGB_565_Config,
56 };
57
58 class TilingGM : public skiagm::GM {
59 public:
TilingGM(bool powerOfTwoSize)60 TilingGM(bool powerOfTwoSize)
61 : fPowerOfTwoSize(powerOfTwoSize) {
62 }
63
64 SkBitmap fTexture[SK_ARRAY_COUNT(gConfigs)];
65
66 protected:
67
68 enum {
69 kPOTSize = 32,
70 kNPOTSize = 21,
71 };
72
onShortName()73 SkString onShortName() {
74 SkString name("tilemodes");
75 if (!fPowerOfTwoSize) {
76 name.append("_npot");
77 }
78 return name;
79 }
80
onISize()81 SkISize onISize() { return SkISize::Make(880, 560); }
82
onOnceBeforeDraw()83 virtual void onOnceBeforeDraw() SK_OVERRIDE {
84 int size = fPowerOfTwoSize ? kPOTSize : kNPOTSize;
85 for (size_t i = 0; i < SK_ARRAY_COUNT(gConfigs); i++) {
86 makebm(&fTexture[i], gConfigs[i], size, size);
87 }
88 }
89
onDraw(SkCanvas * canvas)90 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
91
92 int size = fPowerOfTwoSize ? kPOTSize : kNPOTSize;
93
94 SkRect r = { 0, 0, SkIntToScalar(size*2), SkIntToScalar(size*2) };
95
96 static const char* gConfigNames[] = { "8888", "565", "4444" };
97
98 static const bool gFilters[] = { false, true };
99 static const char* gFilterNames[] = { "point", "bilinear" };
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);
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 p.setDither(true);
113 str.printf("[%s,%s]", gModeNames[kx], gModeNames[ky]);
114
115 p.setTextAlign(SkPaint::kCenter_Align);
116 canvas->drawText(str.c_str(), str.size(), x + r.width()/2, y, p);
117
118 x += r.width() * 4 / 3;
119 }
120 }
121
122 y += SkIntToScalar(16);
123
124 for (size_t i = 0; i < SK_ARRAY_COUNT(gConfigs); i++) {
125 for (size_t j = 0; j < SK_ARRAY_COUNT(gFilters); j++) {
126 x = SkIntToScalar(10);
127 for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
128 for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
129 SkPaint paint;
130 #if 1 // Temporary change to regen bitmap before each draw. This may help tracking down an issue
131 // on SGX where resizing NPOT textures to POT textures exhibits a driver bug.
132 if (!fPowerOfTwoSize) {
133 makebm(&fTexture[i], gConfigs[i], size, size);
134 }
135 #endif
136 setup(&paint, fTexture[i], gFilters[j], gModes[kx], gModes[ky]);
137 paint.setDither(true);
138
139 canvas->save();
140 canvas->translate(x, y);
141 canvas->drawRect(r, paint);
142 canvas->restore();
143
144 x += r.width() * 4 / 3;
145 }
146 }
147 {
148 SkPaint p;
149 SkString str;
150 p.setAntiAlias(true);
151 str.printf("%s, %s", gConfigNames[i], gFilterNames[j]);
152 canvas->drawText(str.c_str(), str.size(), x, y + r.height() * 2 / 3, p);
153 }
154
155 y += r.height() * 4 / 3;
156 }
157 }
158 }
159
160 private:
161 bool fPowerOfTwoSize;
162 typedef skiagm::GM INHERITED;
163 };
164
165 static const int gWidth = 32;
166 static const int gHeight = 32;
167
make_bm(SkShader::TileMode tx,SkShader::TileMode ty)168 static SkShader* make_bm(SkShader::TileMode tx, SkShader::TileMode ty) {
169 SkBitmap bm;
170 makebm(&bm, SkBitmap::kARGB_8888_Config, gWidth, gHeight);
171 return SkShader::CreateBitmapShader(bm, tx, ty);
172 }
173
make_grad(SkShader::TileMode tx,SkShader::TileMode ty)174 static SkShader* make_grad(SkShader::TileMode tx, SkShader::TileMode ty) {
175 SkPoint pts[] = { { 0, 0 }, { SkIntToScalar(gWidth), SkIntToScalar(gHeight)} };
176 SkPoint center = { SkIntToScalar(gWidth)/2, SkIntToScalar(gHeight)/2 };
177 SkScalar rad = SkIntToScalar(gWidth)/2;
178 SkColor colors[] = { 0xFFFF0000, 0xFF0044FF };
179
180 int index = (int)ty;
181 switch (index % 3) {
182 case 0:
183 return SkGradientShader::CreateLinear(pts, colors, NULL, SK_ARRAY_COUNT(colors), tx);
184 case 1:
185 return SkGradientShader::CreateRadial(center, rad, colors, NULL, SK_ARRAY_COUNT(colors), tx);
186 case 2:
187 return SkGradientShader::CreateSweep(center.fX, center.fY, colors, NULL, SK_ARRAY_COUNT(colors));
188 }
189
190 return NULL;
191 }
192
193 typedef SkShader* (*ShaderProc)(SkShader::TileMode, SkShader::TileMode);
194
195 class Tiling2GM : public skiagm::GM {
196 ShaderProc fProc;
197 SkString fName;
198 public:
Tiling2GM(ShaderProc proc,const char name[])199 Tiling2GM(ShaderProc proc, const char name[]) : fProc(proc) {
200 fName.printf("tilemode_%s", name);
201 }
202
203 protected:
onShortName()204 SkString onShortName() {
205 return fName;
206 }
207
onISize()208 SkISize onISize() { return SkISize::Make(880, 560); }
209
onDraw(SkCanvas * canvas)210 virtual void onDraw(SkCanvas* canvas) {
211 canvas->scale(SkIntToScalar(3)/2, SkIntToScalar(3)/2);
212
213 const SkScalar w = SkIntToScalar(gWidth);
214 const SkScalar h = SkIntToScalar(gHeight);
215 SkRect r = { -w, -h, w*2, h*2 };
216
217 static const SkShader::TileMode gModes[] = {
218 SkShader::kClamp_TileMode, SkShader::kRepeat_TileMode, SkShader::kMirror_TileMode
219 };
220 static const char* gModeNames[] = {
221 "Clamp", "Repeat", "Mirror"
222 };
223
224 SkScalar y = SkIntToScalar(24);
225 SkScalar x = SkIntToScalar(66);
226
227 SkPaint p;
228 p.setAntiAlias(true);
229 p.setTextAlign(SkPaint::kCenter_Align);
230
231 for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
232 SkString str(gModeNames[kx]);
233 canvas->drawText(str.c_str(), str.size(), x + r.width()/2, y, p);
234 x += r.width() * 4 / 3;
235 }
236
237 y += SkIntToScalar(16) + h;
238 p.setTextAlign(SkPaint::kRight_Align);
239
240 for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
241 x = SkIntToScalar(16) + w;
242
243 SkString str(gModeNames[ky]);
244 canvas->drawText(str.c_str(), str.size(), x, y + h/2, p);
245
246 x += SkIntToScalar(50);
247 for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
248 SkPaint paint;
249 paint.setShader(fProc(gModes[kx], gModes[ky]))->unref();
250
251 canvas->save();
252 canvas->translate(x, y);
253 canvas->drawRect(r, paint);
254 canvas->restore();
255
256 x += r.width() * 4 / 3;
257 }
258 y += r.height() * 4 / 3;
259 }
260 }
261
262 private:
263 typedef skiagm::GM INHERITED;
264 };
265
266 //////////////////////////////////////////////////////////////////////////////
267
268 DEF_GM( return new TilingGM(true); )
269 DEF_GM( return new TilingGM(false); )
270 DEF_GM( return new Tiling2GM(make_bm, "bitmap"); )
271 DEF_GM( return new Tiling2GM(make_grad, "gradient"); )
272