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