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 // effects
16 #include "SkGradientShader.h"
17 #include "SkBlurDrawLooper.h"
18
19 #include "Resources.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::MakeLinear(pts, colors, pos, SK_ARRAY_COUNT(colors),
33 SkShader::kClamp_TileMode));
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 paint->setShader(SkShader::MakeBitmapShader(bm, tmx, tmy));
40 paint->setFilterQuality(filter ? kLow_SkFilterQuality : kNone_SkFilterQuality);
41 }
42
43 constexpr SkColorType gColorTypes[] = {
44 kN32_SkColorType,
45 kRGB_565_SkColorType,
46 };
47
48 class TilingGM : public skiagm::GM {
49 public:
TilingGM(bool powerOfTwoSize)50 TilingGM(bool powerOfTwoSize)
51 : fPowerOfTwoSize(powerOfTwoSize) {
52 }
53
54 SkBitmap fTexture[SK_ARRAY_COUNT(gColorTypes)];
55
56 protected:
57
58 enum {
59 kPOTSize = 32,
60 kNPOTSize = 21,
61 };
62
onShortName()63 SkString onShortName() override {
64 SkString name("tilemodes");
65 if (!fPowerOfTwoSize) {
66 name.append("_npot");
67 }
68 return name;
69 }
70
onISize()71 SkISize onISize() override { return SkISize::Make(880, 560); }
72
onOnceBeforeDraw()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
onDraw(SkCanvas * canvas)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
153 private:
154 bool fPowerOfTwoSize;
155 typedef skiagm::GM INHERITED;
156 };
157 DEF_GM( return new TilingGM(true); )
158 DEF_GM( return new TilingGM(false); )
159
160 constexpr int gWidth = 32;
161 constexpr int gHeight = 32;
162
make_bm(SkShader::TileMode tx,SkShader::TileMode ty)163 static sk_sp<SkShader> make_bm(SkShader::TileMode tx, SkShader::TileMode ty) {
164 SkBitmap bm;
165 makebm(&bm, kN32_SkColorType, gWidth, gHeight);
166 return SkShader::MakeBitmapShader(bm, tx, ty);
167 }
168
make_grad(SkShader::TileMode tx,SkShader::TileMode ty)169 static sk_sp<SkShader> make_grad(SkShader::TileMode tx, SkShader::TileMode ty) {
170 SkPoint pts[] = { { 0, 0 }, { SkIntToScalar(gWidth), SkIntToScalar(gHeight)} };
171 SkPoint center = { SkIntToScalar(gWidth)/2, SkIntToScalar(gHeight)/2 };
172 SkScalar rad = SkIntToScalar(gWidth)/2;
173 SkColor colors[] = { 0xFFFF0000, sk_tool_utils::color_to_565(0xFF0044FF) };
174
175 int index = (int)ty;
176 switch (index % 3) {
177 case 0:
178 return SkGradientShader::MakeLinear(pts, colors, nullptr, SK_ARRAY_COUNT(colors), tx);
179 case 1:
180 return SkGradientShader::MakeRadial(center, rad, colors, nullptr, SK_ARRAY_COUNT(colors), tx);
181 case 2:
182 return SkGradientShader::MakeSweep(center.fX, center.fY, colors, nullptr,
183 SK_ARRAY_COUNT(colors), tx, 135, 225, 0, nullptr);
184 }
185 return nullptr;
186 }
187
188 typedef sk_sp<SkShader> (*ShaderProc)(SkShader::TileMode, SkShader::TileMode);
189
190 class Tiling2GM : public skiagm::GM {
191 ShaderProc fProc;
192 SkString fName;
193 public:
Tiling2GM(ShaderProc proc,const char name[])194 Tiling2GM(ShaderProc proc, const char name[]) : fProc(proc) {
195 fName.printf("tilemode_%s", name);
196 }
197
198 protected:
199
onShortName()200 SkString onShortName() override {
201 return fName;
202 }
203
onISize()204 SkISize onISize() override { return SkISize::Make(650, 610); }
205
onDraw(SkCanvas * canvas)206 void onDraw(SkCanvas* canvas) override {
207 canvas->scale(SkIntToScalar(3)/2, SkIntToScalar(3)/2);
208
209 const SkScalar w = SkIntToScalar(gWidth);
210 const SkScalar h = SkIntToScalar(gHeight);
211 SkRect r = { -w, -h, w*2, h*2 };
212
213 constexpr SkShader::TileMode gModes[] = {
214 SkShader::kClamp_TileMode, SkShader::kRepeat_TileMode, SkShader::kMirror_TileMode
215 };
216 const char* gModeNames[] = {
217 "Clamp", "Repeat", "Mirror"
218 };
219
220 SkScalar y = SkIntToScalar(24);
221 SkScalar x = SkIntToScalar(66);
222
223 SkPaint p;
224 p.setAntiAlias(true);
225 sk_tool_utils::set_portable_typeface(&p);
226 p.setTextAlign(SkPaint::kCenter_Align);
227
228 for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
229 SkString str(gModeNames[kx]);
230 canvas->drawString(str, x + r.width()/2, y, p);
231 x += r.width() * 4 / 3;
232 }
233
234 y += SkIntToScalar(16) + h;
235 p.setTextAlign(SkPaint::kRight_Align);
236
237 for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
238 x = SkIntToScalar(16) + w;
239
240 SkString str(gModeNames[ky]);
241 canvas->drawString(str, x, y + h/2, p);
242
243 x += SkIntToScalar(50);
244 for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
245 SkPaint paint;
246 paint.setShader(fProc(gModes[kx], gModes[ky]));
247
248 canvas->save();
249 canvas->translate(x, y);
250 canvas->drawRect(r, paint);
251 canvas->restore();
252
253 x += r.width() * 4 / 3;
254 }
255 y += r.height() * 4 / 3;
256 }
257 }
258
259 private:
260 typedef skiagm::GM INHERITED;
261 };
262 DEF_GM( return new Tiling2GM(make_bm, "bitmap"); )
263 DEF_GM( return new Tiling2GM(make_grad, "gradient"); )
264
265 ////////////////////
266
267 #include "SkGradientShader.h"
268
269 DEF_SIMPLE_GM(tilemode_decal, canvas, 715, 560) {
270 auto img = GetResourceAsImage("images/mandrill_128.png");
271 SkPaint bgpaint;
272 bgpaint.setColor(SK_ColorYELLOW);
273
274 SkRect r = { -20, -20, img->width() + 20.0f, img->height() + 20.0f };
275 canvas->translate(25, 25);
276
277 std::function<void(SkPaint*, SkShader::TileMode, SkShader::TileMode)> shader_procs[] = {
__anon4ab900ff0202() 278 [img](SkPaint* paint, SkShader::TileMode tx, SkShader::TileMode ty) {
279 paint->setShader(img->makeShader(tx, ty));
280 },
__anon4ab900ff0302() 281 [img](SkPaint* paint, SkShader::TileMode tx, SkShader::TileMode ty) {
282 SkColor colors[] = { SK_ColorRED, SK_ColorBLUE };
283 const SkPoint pts[] = {{ 0, 0 }, {img->width()*1.0f, img->height()*1.0f }};
284 const SkScalar* pos = nullptr;
285 const int count = SK_ARRAY_COUNT(colors);
286 paint->setShader(SkGradientShader::MakeLinear(pts, colors, pos, count, tx));
287 },
__anon4ab900ff0402() 288 [img](SkPaint* paint, SkShader::TileMode tx, SkShader::TileMode ty) {
289 SkColor colors[] = { SK_ColorRED, SK_ColorBLUE };
290 const SkScalar* pos = nullptr;
291 const int count = SK_ARRAY_COUNT(colors);
292 paint->setShader(SkGradientShader::MakeRadial({ img->width()*0.5f, img->width()*0.5f },
293 img->width()*0.5f, colors, pos, count, tx));
294 },
295 };
296
297 const struct XY {
298 SkShader::TileMode fX;
299 SkShader::TileMode fY;
300 } pairs[] = {
301 { SkShader::kClamp_TileMode, SkShader::kClamp_TileMode },
302 { SkShader::kClamp_TileMode, SkShader::kDecal_TileMode },
303 { SkShader::kDecal_TileMode, SkShader::kClamp_TileMode },
304 { SkShader::kDecal_TileMode, SkShader::kDecal_TileMode },
305 };
306 for (const auto& p : pairs) {
307 SkPaint paint;
308 canvas->save();
309 for (const auto& proc : shader_procs) {
310 canvas->drawRect(r, bgpaint);
311 proc(&paint, p.fX, p.fY);
312 canvas->drawRect(r, paint);
313 canvas->translate(0, r.height() + 20);
314 }
315 canvas->restore();
316 canvas->translate(r.width() + 10, 0);
317 }
318 }
319
320
