csmartdalton | ed4984b | 2017-02-13 14:57:28 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2017 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 | |
Ben Wagner | b2c4ea6 | 2018-08-08 11:36:17 -0400 | [diff] [blame] | 8 | #include "Sample.h" |
csmartdalton | ed4984b | 2017-02-13 14:57:28 -0700 | [diff] [blame] | 9 | #include "SkAnimTimer.h" |
| 10 | #include "SkCanvas.h" |
csmartdalton | ed4984b | 2017-02-13 14:57:28 -0700 | [diff] [blame] | 11 | #include "SkPaint.h" |
| 12 | #include "SkPath.h" |
| 13 | #include "SkRandom.h" |
Herb Derby | 5fd955e | 2019-01-16 11:23:29 -0500 | [diff] [blame] | 14 | #include "SkStrike.h" |
Herb Derby | dce19a7 | 2018-04-18 16:02:17 -0400 | [diff] [blame] | 15 | #include "SkStrikeCache.h" |
csmartdalton | ed4984b | 2017-02-13 14:57:28 -0700 | [diff] [blame] | 16 | #include "SkTaskGroup.h" |
Chris Dalton | 7c02cc7 | 2017-11-06 14:10:54 -0700 | [diff] [blame] | 17 | #include "sk_tool_utils.h" |
csmartdalton | ed4984b | 2017-02-13 14:57:28 -0700 | [diff] [blame] | 18 | |
| 19 | //////////////////////////////////////////////////////////////////////////////////////////////////// |
| 20 | // Static text from paths. |
Ben Wagner | b2c4ea6 | 2018-08-08 11:36:17 -0400 | [diff] [blame] | 21 | class PathText : public Sample { |
csmartdalton | ed4984b | 2017-02-13 14:57:28 -0700 | [diff] [blame] | 22 | public: |
| 23 | constexpr static int kNumPaths = 1500; |
| 24 | virtual const char* getName() const { return "PathText"; } |
| 25 | |
Ben Wagner | 9d289e2 | 2018-09-17 15:25:18 -0400 | [diff] [blame] | 26 | PathText() {} |
| 27 | |
| 28 | virtual void reset() { |
| 29 | for (Glyph& glyph : fGlyphs) { |
| 30 | glyph.reset(fRand, this->width(), this->height()); |
| 31 | } |
| 32 | } |
| 33 | |
| 34 | void onOnceBeforeDraw() final { |
Mike Reed | 32c6066 | 2018-11-28 10:28:07 -0500 | [diff] [blame] | 35 | SkFont defaultFont; |
| 36 | auto cache = SkStrikeCache::FindOrCreateStrikeWithNoDeviceExclusive(defaultFont); |
csmartdalton | ed4984b | 2017-02-13 14:57:28 -0700 | [diff] [blame] | 37 | SkPath glyphPaths[52]; |
| 38 | for (int i = 0; i < 52; ++i) { |
| 39 | // I and l are rects on OS X ... |
| 40 | char c = "aQCDEFGH7JKLMNOPBRZTUVWXYSAbcdefghijk1mnopqrstuvwxyz"[i]; |
Mike Reed | fdb876d | 2019-02-01 09:55:20 -0500 | [diff] [blame] | 41 | SkPackedGlyphID id(defaultFont.unicharToGlyph(c)); |
Ben Wagner | 5ddb308 | 2018-03-29 11:18:06 -0400 | [diff] [blame] | 42 | sk_ignore_unused_variable(cache->getScalerContext()->getPath(id, &glyphPaths[i])); |
csmartdalton | ed4984b | 2017-02-13 14:57:28 -0700 | [diff] [blame] | 43 | } |
| 44 | |
| 45 | for (int i = 0; i < kNumPaths; ++i) { |
| 46 | const SkPath& p = glyphPaths[i % 52]; |
| 47 | fGlyphs[i].init(fRand, p); |
| 48 | } |
csmartdalton | ed4984b | 2017-02-13 14:57:28 -0700 | [diff] [blame] | 49 | |
Ben Wagner | 9d289e2 | 2018-09-17 15:25:18 -0400 | [diff] [blame] | 50 | this->INHERITED::onOnceBeforeDraw(); |
| 51 | this->reset(); |
csmartdalton | ed4984b | 2017-02-13 14:57:28 -0700 | [diff] [blame] | 52 | } |
csmartdalton | ed4984b | 2017-02-13 14:57:28 -0700 | [diff] [blame] | 53 | void onSizeChange() final { this->INHERITED::onSizeChange(); this->reset(); } |
| 54 | |
Ben Wagner | b2c4ea6 | 2018-08-08 11:36:17 -0400 | [diff] [blame] | 55 | bool onQuery(Sample::Event* evt) final { |
| 56 | if (Sample::TitleQ(*evt)) { |
| 57 | Sample::TitleR(evt, this->getName()); |
csmartdalton | ed4984b | 2017-02-13 14:57:28 -0700 | [diff] [blame] | 58 | return true; |
| 59 | } |
Chris Dalton | 7c02cc7 | 2017-11-06 14:10:54 -0700 | [diff] [blame] | 60 | SkUnichar unichar; |
Ben Wagner | b2c4ea6 | 2018-08-08 11:36:17 -0400 | [diff] [blame] | 61 | if (Sample::CharQ(*evt, &unichar)) { |
Chris Dalton | 7c02cc7 | 2017-11-06 14:10:54 -0700 | [diff] [blame] | 62 | if (unichar == 'X') { |
| 63 | fDoClip = !fDoClip; |
Chris Dalton | 7c02cc7 | 2017-11-06 14:10:54 -0700 | [diff] [blame] | 64 | return true; |
| 65 | } |
| 66 | } |
csmartdalton | ed4984b | 2017-02-13 14:57:28 -0700 | [diff] [blame] | 67 | return this->INHERITED::onQuery(evt); |
| 68 | } |
| 69 | |
| 70 | void onDrawContent(SkCanvas* canvas) override { |
Chris Dalton | 7c02cc7 | 2017-11-06 14:10:54 -0700 | [diff] [blame] | 71 | if (fDoClip) { |
Chris Dalton | a32a3c3 | 2017-12-05 10:05:21 -0700 | [diff] [blame] | 72 | SkPath deviceSpaceClipPath = fClipPath; |
| 73 | deviceSpaceClipPath.transform(SkMatrix::MakeScale(this->width(), this->height())); |
Chris Dalton | 7c02cc7 | 2017-11-06 14:10:54 -0700 | [diff] [blame] | 74 | canvas->save(); |
Chris Dalton | a32a3c3 | 2017-12-05 10:05:21 -0700 | [diff] [blame] | 75 | canvas->clipPath(deviceSpaceClipPath, SkClipOp::kDifference, true); |
Chris Dalton | 7c02cc7 | 2017-11-06 14:10:54 -0700 | [diff] [blame] | 76 | canvas->clear(SK_ColorBLACK); |
| 77 | canvas->restore(); |
Chris Dalton | a32a3c3 | 2017-12-05 10:05:21 -0700 | [diff] [blame] | 78 | canvas->clipPath(deviceSpaceClipPath, SkClipOp::kIntersect, true); |
Chris Dalton | 7c02cc7 | 2017-11-06 14:10:54 -0700 | [diff] [blame] | 79 | } |
| 80 | this->drawGlyphs(canvas); |
| 81 | } |
| 82 | |
| 83 | virtual void drawGlyphs(SkCanvas* canvas) { |
csmartdalton | ed4984b | 2017-02-13 14:57:28 -0700 | [diff] [blame] | 84 | for (Glyph& glyph : fGlyphs) { |
| 85 | SkAutoCanvasRestore acr(canvas, true); |
| 86 | canvas->translate(glyph.fPosition.x(), glyph.fPosition.y()); |
| 87 | canvas->scale(glyph.fZoom, glyph.fZoom); |
| 88 | canvas->rotate(glyph.fSpin); |
| 89 | canvas->translate(-glyph.fMidpt.x(), -glyph.fMidpt.y()); |
| 90 | canvas->drawPath(glyph.fPath, glyph.fPaint); |
| 91 | } |
| 92 | } |
| 93 | |
| 94 | protected: |
| 95 | struct Glyph { |
| 96 | void init(SkRandom& rand, const SkPath& path); |
| 97 | void reset(SkRandom& rand, int w, int h); |
| 98 | |
| 99 | SkPath fPath; |
| 100 | SkPaint fPaint; |
| 101 | SkPoint fPosition; |
| 102 | SkScalar fZoom; |
| 103 | SkScalar fSpin; |
| 104 | SkPoint fMidpt; |
| 105 | }; |
| 106 | |
| 107 | Glyph fGlyphs[kNumPaths]; |
Chris Dalton | 7c02cc7 | 2017-11-06 14:10:54 -0700 | [diff] [blame] | 108 | SkRandom fRand{25}; |
| 109 | SkPath fClipPath = sk_tool_utils::make_star(SkRect{0,0,1,1}, 11, 3); |
| 110 | bool fDoClip = false; |
csmartdalton | ed4984b | 2017-02-13 14:57:28 -0700 | [diff] [blame] | 111 | |
Ben Wagner | b2c4ea6 | 2018-08-08 11:36:17 -0400 | [diff] [blame] | 112 | typedef Sample INHERITED; |
csmartdalton | ed4984b | 2017-02-13 14:57:28 -0700 | [diff] [blame] | 113 | }; |
| 114 | |
| 115 | void PathText::Glyph::init(SkRandom& rand, const SkPath& path) { |
| 116 | fPath = path; |
| 117 | fPaint.setAntiAlias(true); |
| 118 | fPaint.setColor(rand.nextU() | 0x80808080); |
| 119 | } |
| 120 | |
| 121 | void PathText::Glyph::reset(SkRandom& rand, int w, int h) { |
| 122 | int screensize = SkTMax(w, h); |
| 123 | const SkRect& bounds = fPath.getBounds(); |
| 124 | SkScalar t; |
| 125 | |
| 126 | fPosition = {rand.nextF() * w, rand.nextF() * h}; |
| 127 | t = pow(rand.nextF(), 100); |
| 128 | fZoom = ((1 - t) * screensize / 50 + t * screensize / 3) / |
| 129 | SkTMax(bounds.width(), bounds.height()); |
| 130 | fSpin = rand.nextF() * 360; |
| 131 | fMidpt = {bounds.centerX(), bounds.centerY()}; |
| 132 | } |
| 133 | |
| 134 | //////////////////////////////////////////////////////////////////////////////////////////////////// |
| 135 | // Text from paths with animated transformation matrices. |
| 136 | class MovingPathText : public PathText { |
| 137 | public: |
| 138 | const char* getName() const override { return "MovingPathText"; } |
| 139 | |
| 140 | MovingPathText() |
| 141 | : fFrontMatrices(kNumPaths) |
| 142 | , fBackMatrices(kNumPaths) { |
| 143 | } |
| 144 | |
Brian Salomon | d3b6597 | 2017-03-22 12:05:03 -0400 | [diff] [blame] | 145 | ~MovingPathText() override { |
csmartdalton | ed4984b | 2017-02-13 14:57:28 -0700 | [diff] [blame] | 146 | fBackgroundAnimationTask.wait(); |
| 147 | } |
| 148 | |
| 149 | void reset() override { |
| 150 | const SkScalar screensize = static_cast<SkScalar>(SkTMax(this->width(), this->height())); |
| 151 | this->INHERITED::reset(); |
| 152 | |
| 153 | for (auto& v : fVelocities) { |
| 154 | for (SkScalar* d : {&v.fDx, &v.fDy}) { |
| 155 | SkScalar t = pow(fRand.nextF(), 3); |
| 156 | *d = ((1 - t) / 60 + t / 10) * (fRand.nextBool() ? screensize : -screensize); |
| 157 | } |
| 158 | |
| 159 | SkScalar t = pow(fRand.nextF(), 25); |
| 160 | v.fDSpin = ((1 - t) * 360 / 7.5 + t * 360 / 1.5) * (fRand.nextBool() ? 1 : -1); |
| 161 | } |
| 162 | |
| 163 | // Get valid front data. |
| 164 | fBackgroundAnimationTask.wait(); |
| 165 | this->runAnimationTask(0, 0, this->width(), this->height()); |
| 166 | memcpy(fFrontMatrices, fBackMatrices, kNumPaths * sizeof(SkMatrix)); |
| 167 | fLastTick = 0; |
| 168 | } |
| 169 | |
| 170 | bool onAnimate(const SkAnimTimer& timer) final { |
| 171 | fBackgroundAnimationTask.wait(); |
| 172 | this->swapAnimationBuffers(); |
| 173 | |
| 174 | const double tsec = timer.secs(); |
| 175 | const double dt = fLastTick ? (timer.secs() - fLastTick) : 0; |
| 176 | fBackgroundAnimationTask.add(std::bind(&MovingPathText::runAnimationTask, this, tsec, |
| 177 | dt, this->width(), this->height())); |
| 178 | fLastTick = timer.secs(); |
| 179 | return true; |
| 180 | } |
| 181 | |
| 182 | /** |
| 183 | * Called on a background thread. Here we can only modify fBackMatrices. |
| 184 | */ |
| 185 | virtual void runAnimationTask(double t, double dt, int w, int h) { |
| 186 | for (int idx = 0; idx < kNumPaths; ++idx) { |
| 187 | Velocity* v = &fVelocities[idx]; |
| 188 | Glyph* glyph = &fGlyphs[idx]; |
| 189 | SkMatrix* backMatrix = &fBackMatrices[idx]; |
| 190 | |
| 191 | glyph->fPosition.fX += v->fDx * dt; |
| 192 | if (glyph->fPosition.x() < 0) { |
| 193 | glyph->fPosition.fX -= 2 * glyph->fPosition.x(); |
| 194 | v->fDx = -v->fDx; |
| 195 | } else if (glyph->fPosition.x() > w) { |
| 196 | glyph->fPosition.fX -= 2 * (glyph->fPosition.x() - w); |
| 197 | v->fDx = -v->fDx; |
| 198 | } |
| 199 | |
| 200 | glyph->fPosition.fY += v->fDy * dt; |
| 201 | if (glyph->fPosition.y() < 0) { |
| 202 | glyph->fPosition.fY -= 2 * glyph->fPosition.y(); |
| 203 | v->fDy = -v->fDy; |
| 204 | } else if (glyph->fPosition.y() > h) { |
| 205 | glyph->fPosition.fY -= 2 * (glyph->fPosition.y() - h); |
| 206 | v->fDy = -v->fDy; |
| 207 | } |
| 208 | |
| 209 | glyph->fSpin += v->fDSpin * dt; |
| 210 | |
| 211 | backMatrix->setTranslate(glyph->fPosition.x(), glyph->fPosition.y()); |
| 212 | backMatrix->preScale(glyph->fZoom, glyph->fZoom); |
| 213 | backMatrix->preRotate(glyph->fSpin); |
| 214 | backMatrix->preTranslate(-glyph->fMidpt.x(), -glyph->fMidpt.y()); |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | virtual void swapAnimationBuffers() { |
| 219 | std::swap(fFrontMatrices, fBackMatrices); |
| 220 | } |
| 221 | |
Chris Dalton | 7c02cc7 | 2017-11-06 14:10:54 -0700 | [diff] [blame] | 222 | void drawGlyphs(SkCanvas* canvas) override { |
csmartdalton | ed4984b | 2017-02-13 14:57:28 -0700 | [diff] [blame] | 223 | for (int i = 0; i < kNumPaths; ++i) { |
| 224 | SkAutoCanvasRestore acr(canvas, true); |
| 225 | canvas->concat(fFrontMatrices[i]); |
| 226 | canvas->drawPath(fGlyphs[i].fPath, fGlyphs[i].fPaint); |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | protected: |
| 231 | struct Velocity { |
| 232 | SkScalar fDx, fDy; |
| 233 | SkScalar fDSpin; |
| 234 | }; |
| 235 | |
| 236 | Velocity fVelocities[kNumPaths]; |
| 237 | SkAutoTMalloc<SkMatrix> fFrontMatrices; |
| 238 | SkAutoTMalloc<SkMatrix> fBackMatrices; |
| 239 | SkTaskGroup fBackgroundAnimationTask; |
| 240 | double fLastTick; |
| 241 | |
| 242 | typedef PathText INHERITED; |
| 243 | }; |
| 244 | |
| 245 | |
| 246 | //////////////////////////////////////////////////////////////////////////////////////////////////// |
| 247 | // Text from paths with animated control points. |
| 248 | class WavyPathText : public MovingPathText { |
| 249 | public: |
| 250 | const char* getName() const override { return "WavyPathText"; } |
| 251 | |
| 252 | WavyPathText() |
| 253 | : fFrontPaths(kNumPaths) |
| 254 | , fBackPaths(kNumPaths) {} |
| 255 | |
Brian Salomon | d3b6597 | 2017-03-22 12:05:03 -0400 | [diff] [blame] | 256 | ~WavyPathText() override { |
csmartdalton | ed4984b | 2017-02-13 14:57:28 -0700 | [diff] [blame] | 257 | fBackgroundAnimationTask.wait(); |
| 258 | } |
| 259 | |
| 260 | void reset() override { |
| 261 | fWaves.reset(fRand, this->width(), this->height()); |
| 262 | this->INHERITED::reset(); |
| 263 | std::copy(fBackPaths.get(), fBackPaths.get() + kNumPaths, fFrontPaths.get()); |
| 264 | } |
| 265 | |
| 266 | /** |
| 267 | * Called on a background thread. Here we can only modify fBackPaths. |
| 268 | */ |
| 269 | void runAnimationTask(double t, double dt, int w, int h) override { |
| 270 | const float tsec = static_cast<float>(t); |
| 271 | this->INHERITED::runAnimationTask(t, 0.5 * dt, w, h); |
| 272 | |
| 273 | for (int i = 0; i < kNumPaths; ++i) { |
| 274 | const Glyph& glyph = fGlyphs[i]; |
| 275 | const SkMatrix& backMatrix = fBackMatrices[i]; |
| 276 | |
| 277 | const Sk2f matrix[3] = { |
| 278 | Sk2f(backMatrix.getScaleX(), backMatrix.getSkewY()), |
| 279 | Sk2f(backMatrix.getSkewX(), backMatrix.getScaleY()), |
| 280 | Sk2f(backMatrix.getTranslateX(), backMatrix.getTranslateY()) |
| 281 | }; |
| 282 | |
| 283 | SkPath* backpath = &fBackPaths[i]; |
| 284 | backpath->reset(); |
| 285 | backpath->setFillType(SkPath::kEvenOdd_FillType); |
| 286 | |
| 287 | SkPath::RawIter iter(glyph.fPath); |
| 288 | SkPath::Verb verb; |
| 289 | SkPoint pts[4]; |
| 290 | |
| 291 | while ((verb = iter.next(pts)) != SkPath::kDone_Verb) { |
| 292 | switch (verb) { |
| 293 | case SkPath::kMove_Verb: { |
| 294 | SkPoint pt = fWaves.apply(tsec, matrix, pts[0]); |
| 295 | backpath->moveTo(pt.x(), pt.y()); |
| 296 | break; |
| 297 | } |
| 298 | case SkPath::kLine_Verb: { |
| 299 | SkPoint endpt = fWaves.apply(tsec, matrix, pts[1]); |
| 300 | backpath->lineTo(endpt.x(), endpt.y()); |
| 301 | break; |
| 302 | } |
| 303 | case SkPath::kQuad_Verb: { |
| 304 | SkPoint controlPt = fWaves.apply(tsec, matrix, pts[1]); |
| 305 | SkPoint endpt = fWaves.apply(tsec, matrix, pts[2]); |
| 306 | backpath->quadTo(controlPt.x(), controlPt.y(), endpt.x(), endpt.y()); |
| 307 | break; |
| 308 | } |
| 309 | case SkPath::kClose_Verb: { |
| 310 | backpath->close(); |
| 311 | break; |
| 312 | } |
| 313 | case SkPath::kCubic_Verb: |
| 314 | case SkPath::kConic_Verb: |
| 315 | case SkPath::kDone_Verb: |
Ben Wagner | b4aab9a | 2017-08-16 10:53:04 -0400 | [diff] [blame] | 316 | SK_ABORT("Unexpected path verb"); |
csmartdalton | ed4984b | 2017-02-13 14:57:28 -0700 | [diff] [blame] | 317 | break; |
| 318 | } |
| 319 | } |
| 320 | } |
| 321 | } |
| 322 | |
| 323 | void swapAnimationBuffers() override { |
| 324 | this->INHERITED::swapAnimationBuffers(); |
Hal Canary | 6736236 | 2018-04-24 13:58:37 -0400 | [diff] [blame] | 325 | std::swap(fFrontPaths, fBackPaths); |
csmartdalton | ed4984b | 2017-02-13 14:57:28 -0700 | [diff] [blame] | 326 | } |
| 327 | |
Chris Dalton | 7c02cc7 | 2017-11-06 14:10:54 -0700 | [diff] [blame] | 328 | void drawGlyphs(SkCanvas* canvas) override { |
csmartdalton | ed4984b | 2017-02-13 14:57:28 -0700 | [diff] [blame] | 329 | for (int i = 0; i < kNumPaths; ++i) { |
| 330 | canvas->drawPath(fFrontPaths[i], fGlyphs[i].fPaint); |
| 331 | } |
| 332 | } |
| 333 | |
| 334 | private: |
| 335 | /** |
| 336 | * Describes 4 stacked sine waves that can offset a point as a function of wall time. |
| 337 | */ |
| 338 | class Waves { |
| 339 | public: |
| 340 | void reset(SkRandom& rand, int w, int h); |
| 341 | SkPoint apply(float tsec, const Sk2f matrix[3], const SkPoint& pt) const; |
| 342 | |
| 343 | private: |
| 344 | constexpr static double kAverageAngle = SK_ScalarPI / 8.0; |
| 345 | constexpr static double kMaxOffsetAngle = SK_ScalarPI / 3.0; |
| 346 | |
| 347 | float fAmplitudes[4]; |
| 348 | float fFrequencies[4]; |
| 349 | float fDirsX[4]; |
| 350 | float fDirsY[4]; |
| 351 | float fSpeeds[4]; |
| 352 | float fOffsets[4]; |
| 353 | }; |
| 354 | |
| 355 | SkAutoTArray<SkPath> fFrontPaths; |
| 356 | SkAutoTArray<SkPath> fBackPaths; |
| 357 | Waves fWaves; |
| 358 | |
| 359 | typedef MovingPathText INHERITED; |
| 360 | }; |
| 361 | |
| 362 | void WavyPathText::Waves::reset(SkRandom& rand, int w, int h) { |
| 363 | const double pixelsPerMeter = 0.06 * SkTMax(w, h); |
| 364 | const double medianWavelength = 8 * pixelsPerMeter; |
| 365 | const double medianWaveAmplitude = 0.05 * 4 * pixelsPerMeter; |
| 366 | const double gravity = 9.8 * pixelsPerMeter; |
| 367 | |
| 368 | for (int i = 0; i < 4; ++i) { |
| 369 | const double offsetAngle = (rand.nextF() * 2 - 1) * kMaxOffsetAngle; |
| 370 | const double intensity = pow(2, rand.nextF() * 2 - 1); |
| 371 | const double wavelength = intensity * medianWavelength; |
| 372 | |
| 373 | fAmplitudes[i] = intensity * medianWaveAmplitude; |
| 374 | fFrequencies[i] = 2 * SK_ScalarPI / wavelength; |
| 375 | fDirsX[i] = cosf(kAverageAngle + offsetAngle); |
| 376 | fDirsY[i] = sinf(kAverageAngle + offsetAngle); |
| 377 | fSpeeds[i] = -sqrt(gravity * 2 * SK_ScalarPI / wavelength); |
| 378 | fOffsets[i] = rand.nextF() * 2 * SK_ScalarPI; |
| 379 | } |
| 380 | } |
| 381 | |
| 382 | SkPoint WavyPathText::Waves::apply(float tsec, const Sk2f matrix[3], const SkPoint& pt) const { |
Chris Dalton | 95cf166 | 2017-06-20 16:32:59 -0700 | [diff] [blame] | 383 | constexpr static int kTablePeriod = 1 << 12; |
| 384 | static float sin2table[kTablePeriod + 1]; |
csmartdalton | ed4984b | 2017-02-13 14:57:28 -0700 | [diff] [blame] | 385 | static SkOnce initTable; |
| 386 | initTable([]() { |
Chris Dalton | 95cf166 | 2017-06-20 16:32:59 -0700 | [diff] [blame] | 387 | for (int i = 0; i <= kTablePeriod; ++i) { |
| 388 | const double sintheta = sin(i * (SK_ScalarPI / kTablePeriod)); |
csmartdalton | ed4984b | 2017-02-13 14:57:28 -0700 | [diff] [blame] | 389 | sin2table[i] = static_cast<float>(sintheta * sintheta - 0.5); |
| 390 | } |
| 391 | }); |
| 392 | |
| 393 | const Sk4f amplitudes = Sk4f::Load(fAmplitudes); |
| 394 | const Sk4f frequencies = Sk4f::Load(fFrequencies); |
| 395 | const Sk4f dirsX = Sk4f::Load(fDirsX); |
| 396 | const Sk4f dirsY = Sk4f::Load(fDirsY); |
| 397 | const Sk4f speeds = Sk4f::Load(fSpeeds); |
| 398 | const Sk4f offsets = Sk4f::Load(fOffsets); |
| 399 | |
| 400 | float devicePt[2]; |
| 401 | (matrix[0] * pt.x() + matrix[1] * pt.y() + matrix[2]).store(devicePt); |
| 402 | |
| 403 | const Sk4f t = (frequencies * (dirsX * devicePt[0] + dirsY * devicePt[1]) + |
| 404 | speeds * tsec + |
Chris Dalton | 95cf166 | 2017-06-20 16:32:59 -0700 | [diff] [blame] | 405 | offsets).abs() * (float(kTablePeriod) / float(SK_ScalarPI)); |
csmartdalton | ed4984b | 2017-02-13 14:57:28 -0700 | [diff] [blame] | 406 | |
| 407 | const Sk4i ipart = SkNx_cast<int>(t); |
| 408 | const Sk4f fpart = t - SkNx_cast<float>(ipart); |
| 409 | |
| 410 | int32_t indices[4]; |
Chris Dalton | 95cf166 | 2017-06-20 16:32:59 -0700 | [diff] [blame] | 411 | (ipart & (kTablePeriod-1)).store(indices); |
csmartdalton | ed4984b | 2017-02-13 14:57:28 -0700 | [diff] [blame] | 412 | |
| 413 | const Sk4f left(sin2table[indices[0]], sin2table[indices[1]], |
| 414 | sin2table[indices[2]], sin2table[indices[3]]); |
| 415 | const Sk4f right(sin2table[indices[0] + 1], sin2table[indices[1] + 1], |
| 416 | sin2table[indices[2] + 1], sin2table[indices[3] + 1]); |
| 417 | const Sk4f height = amplitudes * (left * (1.f - fpart) + right * fpart); |
| 418 | |
| 419 | Sk4f dy = height * dirsY; |
| 420 | Sk4f dx = height * dirsX; |
| 421 | |
| 422 | float offsetY[4], offsetX[4]; |
| 423 | (dy + SkNx_shuffle<2,3,0,1>(dy)).store(offsetY); // accumulate. |
Brian Salomon | 2335644 | 2018-11-30 15:33:19 -0500 | [diff] [blame] | 424 | (dx + SkNx_shuffle<2,3,0,1>(dx)).store(offsetX); |
csmartdalton | ed4984b | 2017-02-13 14:57:28 -0700 | [diff] [blame] | 425 | |
| 426 | return {devicePt[0] + offsetY[0] + offsetY[1], devicePt[1] - offsetX[0] - offsetX[1]}; |
| 427 | } |
| 428 | |
| 429 | //////////////////////////////////////////////////////////////////////////////////////////////////// |
| 430 | |
| 431 | DEF_SAMPLE( return new WavyPathText; ) |
| 432 | DEF_SAMPLE( return new MovingPathText; ) |
| 433 | DEF_SAMPLE( return new PathText; ) |