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 "SkTextUtils.h"
15 #include "SkUTF.h"
16 // effects
17 #include "SkGradientShader.h"
18 #include "SkBlurDrawLooper.h"
19
20 #include "Resources.h"
21
makebm(SkBitmap * bm,SkColorType ct,int w,int h)22 static void makebm(SkBitmap* bm, SkColorType ct, int w, int h) {
23 bm->allocPixels(SkImageInfo::Make(w, h, ct, kPremul_SkAlphaType));
24 bm->eraseColor(SK_ColorTRANSPARENT);
25
26 SkCanvas canvas(*bm);
27 SkPoint pts[] = { { 0, 0 }, { SkIntToScalar(w), SkIntToScalar(h)} };
28 SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE };
29 SkScalar pos[] = { 0, SK_Scalar1/2, SK_Scalar1 };
30 SkPaint paint;
31
32 paint.setDither(true);
33 paint.setShader(SkGradientShader::MakeLinear(pts, colors, pos, SK_ARRAY_COUNT(colors),
34 SkShader::kClamp_TileMode));
35 canvas.drawPaint(paint);
36 }
37
setup(SkPaint * paint,const SkBitmap & bm,bool filter,SkShader::TileMode tmx,SkShader::TileMode tmy)38 static void setup(SkPaint* paint, const SkBitmap& bm, bool filter,
39 SkShader::TileMode tmx, SkShader::TileMode tmy) {
40 paint->setShader(SkShader::MakeBitmapShader(bm, tmx, tmy));
41 paint->setFilterQuality(filter ? kLow_SkFilterQuality : kNone_SkFilterQuality);
42 }
43
44 constexpr 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 SkPaint textPaint;
83 SkFont font(sk_tool_utils::create_portable_typeface(), 12);
84
85 int size = fPowerOfTwoSize ? kPOTSize : kNPOTSize;
86
87 SkRect r = { 0, 0, SkIntToScalar(size*2), SkIntToScalar(size*2) };
88
89 const char* gConfigNames[] = { "8888", "565", "4444" };
90
91 constexpr bool gFilters[] = { false, true };
92 static const char* gFilterNames[] = { "point", "bilinear" };
93
94 constexpr SkShader::TileMode gModes[] = {
95 SkShader::kClamp_TileMode, SkShader::kRepeat_TileMode, SkShader::kMirror_TileMode };
96 static const char* gModeNames[] = { "C", "R", "M" };
97
98 SkScalar y = SkIntToScalar(24);
99 SkScalar x = SkIntToScalar(10);
100
101 for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
102 for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
103 SkPaint p;
104 p.setDither(true);
105 SkString str;
106 SkFont font(sk_tool_utils::create_portable_typeface());
107 str.printf("[%s,%s]", gModeNames[kx], gModeNames[ky]);
108
109 SkTextUtils::DrawString(canvas, str.c_str(), x + r.width()/2, y, font, p,
110 SkTextUtils::kCenter_Align);
111
112 x += r.width() * 4 / 3;
113 }
114 }
115
116 y += SkIntToScalar(16);
117
118 for (size_t i = 0; i < SK_ARRAY_COUNT(gColorTypes); i++) {
119 for (size_t j = 0; j < SK_ARRAY_COUNT(gFilters); j++) {
120 x = SkIntToScalar(10);
121 for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
122 for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
123 SkPaint paint;
124 #if 1 // Temporary change to regen bitmap before each draw. This may help tracking down an issue
125 // on SGX where resizing NPOT textures to POT textures exhibits a driver bug.
126 if (!fPowerOfTwoSize) {
127 makebm(&fTexture[i], gColorTypes[i], size, size);
128 }
129 #endif
130 setup(&paint, fTexture[i], gFilters[j], gModes[kx], gModes[ky]);
131 paint.setDither(true);
132
133 canvas->save();
134 canvas->translate(x, y);
135 canvas->drawRect(r, paint);
136 canvas->restore();
137
138 x += r.width() * 4 / 3;
139 }
140 }
141 canvas->drawString(SkStringPrintf("%s, %s", gConfigNames[i], gFilterNames[j]),
142 x, y + r.height() * 2 / 3, font, textPaint);
143
144 y += r.height() * 4 / 3;
145 }
146 }
147 }
148
149 private:
150 bool fPowerOfTwoSize;
151 typedef skiagm::GM INHERITED;
152 };
153 DEF_GM( return new TilingGM(true); )
154 DEF_GM( return new TilingGM(false); )
155
156 constexpr int gWidth = 32;
157 constexpr int gHeight = 32;
158
make_bm(SkShader::TileMode tx,SkShader::TileMode ty)159 static sk_sp<SkShader> make_bm(SkShader::TileMode tx, SkShader::TileMode ty) {
160 SkBitmap bm;
161 makebm(&bm, kN32_SkColorType, gWidth, gHeight);
162 return SkShader::MakeBitmapShader(bm, tx, ty);
163 }
164
make_grad(SkShader::TileMode tx,SkShader::TileMode ty)165 static sk_sp<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::MakeLinear(pts, colors, nullptr, SK_ARRAY_COUNT(colors), tx);
175 case 1:
176 return SkGradientShader::MakeRadial(center, rad, colors, nullptr, SK_ARRAY_COUNT(colors), tx);
177 case 2:
178 return SkGradientShader::MakeSweep(center.fX, center.fY, colors, nullptr,
179 SK_ARRAY_COUNT(colors), tx, 135, 225, 0, nullptr);
180 }
181 return nullptr;
182 }
183
184 typedef sk_sp<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(650, 610); }
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 constexpr SkShader::TileMode gModes[] = {
210 SkShader::kClamp_TileMode, SkShader::kRepeat_TileMode, SkShader::kMirror_TileMode
211 };
212 const char* gModeNames[] = {
213 "Clamp", "Repeat", "Mirror"
214 };
215
216 SkScalar y = SkIntToScalar(24);
217 SkScalar x = SkIntToScalar(66);
218
219 SkFont font(sk_tool_utils::create_portable_typeface());
220
221 for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
222 SkString str(gModeNames[kx]);
223 SkTextUtils::DrawString(canvas, str.c_str(), x + r.width()/2, y, font, SkPaint(),
224 SkTextUtils::kCenter_Align);
225 x += r.width() * 4 / 3;
226 }
227
228 y += SkIntToScalar(16) + h;
229
230 for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
231 x = SkIntToScalar(16) + w;
232
233 SkString str(gModeNames[ky]);
234 SkTextUtils::DrawString(canvas, str.c_str(), x, y + h/2, font, SkPaint(),
235 SkTextUtils::kRight_Align);
236
237 x += SkIntToScalar(50);
238 for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
239 SkPaint paint;
240 paint.setShader(fProc(gModes[kx], gModes[ky]));
241
242 canvas->save();
243 canvas->translate(x, y);
244 canvas->drawRect(r, paint);
245 canvas->restore();
246
247 x += r.width() * 4 / 3;
248 }
249 y += r.height() * 4 / 3;
250 }
251 }
252
253 private:
254 typedef skiagm::GM INHERITED;
255 };
256 DEF_GM( return new Tiling2GM(make_bm, "bitmap"); )
257 DEF_GM( return new Tiling2GM(make_grad, "gradient"); )
258
259 ////////////////////
260
261 #include "SkGradientShader.h"
262
263 DEF_SIMPLE_GM(tilemode_decal, canvas, 720, 1100) {
264 auto img = GetResourceAsImage("images/mandrill_128.png");
265 SkPaint bgpaint;
266 bgpaint.setColor(SK_ColorYELLOW);
267
268 SkRect r = { -20, -20, img->width() + 20.0f, img->height() + 20.0f };
269 canvas->translate(45, 45);
270
271 std::function<void(SkPaint*, SkShader::TileMode, SkShader::TileMode)> shader_procs[] = {
__anon8e0d2e790202() 272 [img](SkPaint* paint, SkShader::TileMode tx, SkShader::TileMode ty) {
273 // Test no filtering with decal mode
274 paint->setShader(img->makeShader(tx, ty));
275 paint->setFilterQuality(kNone_SkFilterQuality);
276 },
__anon8e0d2e790302() 277 [img](SkPaint* paint, SkShader::TileMode tx, SkShader::TileMode ty) {
278 // Test bilerp approximation for decal mode (or clamp to border HW)
279 paint->setShader(img->makeShader(tx, ty));
280 paint->setFilterQuality(kLow_SkFilterQuality);
281 },
__anon8e0d2e790402() 282 [img](SkPaint* paint, SkShader::TileMode tx, SkShader::TileMode ty) {
283 // Test bicubic filter with decal mode
284 paint->setShader(img->makeShader(tx, ty));
285 paint->setFilterQuality(kHigh_SkFilterQuality);
286 },
__anon8e0d2e790502() 287 [img](SkPaint* paint, SkShader::TileMode tx, SkShader::TileMode ty) {
288 SkColor colors[] = { SK_ColorRED, SK_ColorBLUE };
289 const SkPoint pts[] = {{ 0, 0 }, {img->width()*1.0f, img->height()*1.0f }};
290 const SkScalar* pos = nullptr;
291 const int count = SK_ARRAY_COUNT(colors);
292 paint->setShader(SkGradientShader::MakeLinear(pts, colors, pos, count, tx));
293 },
__anon8e0d2e790602() 294 [img](SkPaint* paint, SkShader::TileMode tx, SkShader::TileMode ty) {
295 SkColor colors[] = { SK_ColorRED, SK_ColorBLUE };
296 const SkScalar* pos = nullptr;
297 const int count = SK_ARRAY_COUNT(colors);
298 paint->setShader(SkGradientShader::MakeRadial({ img->width()*0.5f, img->width()*0.5f },
299 img->width()*0.5f, colors, pos, count, tx));
300 },
301 };
302
303 const struct XY {
304 SkShader::TileMode fX;
305 SkShader::TileMode fY;
306 } pairs[] = {
307 { SkShader::kClamp_TileMode, SkShader::kClamp_TileMode },
308 { SkShader::kClamp_TileMode, SkShader::kDecal_TileMode },
309 { SkShader::kDecal_TileMode, SkShader::kClamp_TileMode },
310 { SkShader::kDecal_TileMode, SkShader::kDecal_TileMode },
311 };
312 for (const auto& p : pairs) {
313 SkPaint paint;
314 canvas->save();
315 for (const auto& proc : shader_procs) {
316 canvas->save();
317 // Apply a slight rotation to highlight the differences between filtered and unfiltered
318 // decal edges
319 canvas->rotate(4);
320 canvas->drawRect(r, bgpaint);
321 proc(&paint, p.fX, p.fY);
322 canvas->drawRect(r, paint);
323 canvas->restore();
324 canvas->translate(0, r.height() + 20);
325 }
326 canvas->restore();
327 canvas->translate(r.width() + 10, 0);
328 }
329 }
330
331
