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| 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 "SampleCode.h" | |
| 9 #include "SkView.h" | |
| 10 #include "SkCanvas.h" | |
| 11 #include "SkGradientShader.h" | |
| 12 #include "SkPath.h" | |
| 13 #include "SkRegion.h" | |
| 14 #include "SkShader.h" | |
| 15 #include "SkUtils.h" | |
| 16 #include "SkImageDecoder.h" | |
| 17 | |
| 18 #include "SkBlurMaskFilter.h" | |
| 19 #include "SkTableMaskFilter.h" | |
| 20 | |
| 21 #define kNearlyZero (SK_Scalar1 / 8092) | |
| 22 | |
| 23 static void test_bigblur(SkCanvas* canvas) { | |
| 24 canvas->drawColor(SK_ColorBLACK); | |
| 25 | |
| 26 SkBitmap orig, mask; | |
| 27 SkImageDecoder::DecodeFile("/skimages/app_icon.png", &orig); | |
| 28 | |
| 29 SkMaskFilter* mf = SkBlurMaskFilter::Create(8, SkBlurMaskFilter::kNormal_Blu
rStyle); | |
| 30 SkPaint paint; | |
| 31 paint.setMaskFilter(mf)->unref(); | |
| 32 SkIPoint offset; | |
| 33 orig.extractAlpha(&mask, &paint, &offset); | |
| 34 | |
| 35 paint.setColor(0xFFBB8800); | |
| 36 paint.setColor(SK_ColorWHITE); | |
| 37 | |
| 38 int i; | |
| 39 canvas->save(); | |
| 40 float gamma = 0.8; | |
| 41 for (i = 0; i < 5; i++) { | |
| 42 paint.setMaskFilter(SkTableMaskFilter::CreateGamma(gamma))->unref(); | |
| 43 canvas->drawBitmap(mask, 0, 0, &paint); | |
| 44 paint.setMaskFilter(NULL); | |
| 45 canvas->drawBitmap(orig, -offset.fX, -offset.fY, &paint); | |
| 46 gamma -= 0.1; | |
| 47 canvas->translate(120, 0); | |
| 48 } | |
| 49 canvas->restore(); | |
| 50 canvas->translate(0, 160); | |
| 51 | |
| 52 for (i = 0; i < 5; i++) { | |
| 53 paint.setMaskFilter(SkTableMaskFilter::CreateClip(i*30, 255 - 20))->unre
f(); | |
| 54 canvas->drawBitmap(mask, 0, 0, &paint); | |
| 55 paint.setMaskFilter(NULL); | |
| 56 canvas->drawBitmap(orig, -offset.fX, -offset.fY, &paint); | |
| 57 canvas->translate(120, 0); | |
| 58 } | |
| 59 | |
| 60 #if 0 | |
| 61 paint.setColor(0xFFFFFFFF); | |
| 62 canvas->drawBitmap(mask, 0, 0, &paint); | |
| 63 paint.setMaskFilter(NULL); | |
| 64 canvas->drawBitmap(orig, -offset.fX, -offset.fY, &paint); | |
| 65 | |
| 66 canvas->translate(120, 0); | |
| 67 | |
| 68 canvas->drawBitmap(mask, 0, 0, &paint); | |
| 69 canvas->drawBitmap(mask, 0, 0, &paint); | |
| 70 canvas->drawBitmap(orig, -offset.fX, -offset.fY, &paint); | |
| 71 | |
| 72 canvas->translate(120, 0); | |
| 73 | |
| 74 canvas->drawBitmap(mask, 0, 0, &paint); | |
| 75 canvas->drawBitmap(mask, 0, 0, &paint); | |
| 76 canvas->drawBitmap(mask, 0, 0, &paint); | |
| 77 canvas->drawBitmap(orig, -offset.fX, -offset.fY, &paint); | |
| 78 | |
| 79 canvas->translate(120, 0); | |
| 80 | |
| 81 canvas->drawBitmap(mask, 0, 0, &paint); | |
| 82 canvas->drawBitmap(mask, 0, 0, &paint); | |
| 83 canvas->drawBitmap(mask, 0, 0, &paint); | |
| 84 canvas->drawBitmap(mask, 0, 0, &paint); | |
| 85 canvas->drawBitmap(orig, -offset.fX, -offset.fY, &paint); | |
| 86 | |
| 87 canvas->translate(120, 0); | |
| 88 | |
| 89 canvas->drawBitmap(mask, 0, 0, &paint); | |
| 90 canvas->drawBitmap(mask, 0, 0, &paint); | |
| 91 canvas->drawBitmap(mask, 0, 0, &paint); | |
| 92 canvas->drawBitmap(mask, 0, 0, &paint); | |
| 93 canvas->drawBitmap(mask, 0, 0, &paint); | |
| 94 canvas->drawBitmap(orig, -offset.fX, -offset.fY, &paint); | |
| 95 #endif | |
| 96 } | |
| 97 | |
| 98 #include "SkMeshUtils.h" | |
| 99 | |
| 100 static SkPoint SkMakePoint(SkScalar x, SkScalar y) { | |
| 101 SkPoint pt; | |
| 102 pt.set(x, y); | |
| 103 return pt; | |
| 104 } | |
| 105 | |
| 106 static SkPoint SkPointInterp(const SkPoint& a, const SkPoint& b, SkScalar t) { | |
| 107 return SkMakePoint(SkScalarInterp(a.fX, b.fX, t), | |
| 108 SkScalarInterp(a.fY, b.fY, t)); | |
| 109 } | |
| 110 | |
| 111 #include "SkBoundaryPatch.h" | |
| 112 | |
| 113 static void set_cubic(SkPoint pts[4], SkScalar x0, SkScalar y0, | |
| 114 SkScalar x3, SkScalar y3, SkScalar scale = 1) { | |
| 115 SkPoint tmp, tmp2; | |
| 116 | |
| 117 pts[0].set(x0, y0); | |
| 118 pts[3].set(x3, y3); | |
| 119 | |
| 120 tmp = SkPointInterp(pts[0], pts[3], SK_Scalar1/3); | |
| 121 tmp2 = pts[0] - tmp; | |
| 122 tmp2.rotateCW(); | |
| 123 tmp2.scale(scale); | |
| 124 pts[1] = tmp + tmp2; | |
| 125 | |
| 126 tmp = SkPointInterp(pts[0], pts[3], 2*SK_Scalar1/3); | |
| 127 tmp2 = pts[3] - tmp; | |
| 128 tmp2.rotateCW(); | |
| 129 tmp2.scale(scale); | |
| 130 pts[2] = tmp + tmp2; | |
| 131 } | |
| 132 | |
| 133 static void test_patch(SkCanvas* canvas, const SkBitmap& bm, SkScalar scale) { | |
| 134 SkCubicBoundary cubic; | |
| 135 set_cubic(cubic.fPts + 0, 0, 0, 100, 0, scale); | |
| 136 set_cubic(cubic.fPts + 3, 100, 0, 100, 100, scale); | |
| 137 set_cubic(cubic.fPts + 6, 100, 100, 0, 100, -scale); | |
| 138 set_cubic(cubic.fPts + 9, 0, 100, 0, 0, 0); | |
| 139 | |
| 140 SkBoundaryPatch patch; | |
| 141 patch.setBoundary(&cubic); | |
| 142 | |
| 143 const int Rows = 16; | |
| 144 const int Cols = 16; | |
| 145 SkPoint pts[Rows * Cols]; | |
| 146 patch.evalPatch(pts, Rows, Cols); | |
| 147 | |
| 148 SkPaint paint; | |
| 149 paint.setAntiAlias(true); | |
| 150 paint.setFilterBitmap(true); | |
| 151 paint.setStrokeWidth(1); | |
| 152 paint.setStrokeCap(SkPaint::kRound_Cap); | |
| 153 | |
| 154 canvas->translate(50, 50); | |
| 155 canvas->scale(3, 3); | |
| 156 | |
| 157 SkMeshUtils::Draw(canvas, bm, Rows, Cols, pts, NULL, paint); | |
| 158 } | |
| 159 | |
| 160 static void test_drag(SkCanvas* canvas, const SkBitmap& bm, | |
| 161 const SkPoint& p0, const SkPoint& p1) { | |
| 162 SkCubicBoundary cubic; | |
| 163 set_cubic(cubic.fPts + 0, 0, 0, 100, 0, 0); | |
| 164 set_cubic(cubic.fPts + 3, 100, 0, 100, 100, 0); | |
| 165 set_cubic(cubic.fPts + 6, 100, 100, 0, 100, 0); | |
| 166 set_cubic(cubic.fPts + 9, 0, 100, 0, 0, 0); | |
| 167 | |
| 168 #if 0 | |
| 169 cubic.fPts[1] += p1 - p0; | |
| 170 cubic.fPts[2] += p1 - p0; | |
| 171 #else | |
| 172 SkScalar dx = p1.fX - p0.fX; | |
| 173 if (dx > 0) dx = 0; | |
| 174 SkScalar dy = p1.fY - p0.fY; | |
| 175 if (dy > 0) dy = 0; | |
| 176 | |
| 177 cubic.fPts[1].fY += dy; | |
| 178 cubic.fPts[2].fY += dy; | |
| 179 cubic.fPts[10].fX += dx; | |
| 180 cubic.fPts[11].fX += dx; | |
| 181 #endif | |
| 182 | |
| 183 SkBoundaryPatch patch; | |
| 184 patch.setBoundary(&cubic); | |
| 185 | |
| 186 const int Rows = 16; | |
| 187 const int Cols = 16; | |
| 188 SkPoint pts[Rows * Cols]; | |
| 189 patch.evalPatch(pts, Rows, Cols); | |
| 190 | |
| 191 SkPaint paint; | |
| 192 paint.setAntiAlias(true); | |
| 193 paint.setFilterBitmap(true); | |
| 194 paint.setStrokeWidth(1); | |
| 195 paint.setStrokeCap(SkPaint::kRound_Cap); | |
| 196 | |
| 197 canvas->translate(50, 50); | |
| 198 canvas->scale(3, 3); | |
| 199 | |
| 200 SkAutoCanvasRestore acr(canvas, true); | |
| 201 | |
| 202 SkRect r = { 0, 0, 100, 100 }; | |
| 203 canvas->clipRect(r); | |
| 204 SkMeshUtils::Draw(canvas, bm, Rows, Cols, pts, NULL, paint); | |
| 205 } | |
| 206 | |
| 207 /////////////////////////////////////////////////////////////////////////////// | |
| 208 | |
| 209 class Mesh { | |
| 210 public: | |
| 211 Mesh(); | |
| 212 ~Mesh(); | |
| 213 | |
| 214 Mesh& operator=(const Mesh& src); | |
| 215 | |
| 216 void init(const SkRect& bounds, int rows, int cols, | |
| 217 const SkRect& texture); | |
| 218 | |
| 219 const SkRect& bounds() const { return fBounds; } | |
| 220 | |
| 221 int rows() const { return fRows; } | |
| 222 int cols() const { return fCols; } | |
| 223 SkPoint& pt(int row, int col) { | |
| 224 return fPts[row * (fRows + 1) + col]; | |
| 225 } | |
| 226 | |
| 227 void draw(SkCanvas*, const SkPaint&); | |
| 228 void drawWireframe(SkCanvas* canvas, const SkPaint& paint); | |
| 229 | |
| 230 private: | |
| 231 SkRect fBounds; | |
| 232 int fRows, fCols; | |
| 233 SkPoint* fPts; | |
| 234 SkPoint* fTex; // just points into fPts, not separately allocated | |
| 235 int fCount; | |
| 236 uint16_t* fIndices; | |
| 237 int fIndexCount; | |
| 238 }; | |
| 239 | |
| 240 Mesh::Mesh() : fPts(NULL), fCount(0), fIndices(NULL), fIndexCount(0) {} | |
| 241 | |
| 242 Mesh::~Mesh() { | |
| 243 delete[] fPts; | |
| 244 delete[] fIndices; | |
| 245 } | |
| 246 | |
| 247 Mesh& Mesh::operator=(const Mesh& src) { | |
| 248 delete[] fPts; | |
| 249 delete[] fIndices; | |
| 250 | |
| 251 fBounds = src.fBounds; | |
| 252 fRows = src.fRows; | |
| 253 fCols = src.fCols; | |
| 254 | |
| 255 fCount = src.fCount; | |
| 256 fPts = new SkPoint[fCount * 2]; | |
| 257 fTex = fPts + fCount; | |
| 258 memcpy(fPts, src.fPts, fCount * 2 * sizeof(SkPoint)); | |
| 259 | |
| 260 delete[] fIndices; | |
| 261 fIndexCount = src.fIndexCount; | |
| 262 fIndices = new uint16_t[fIndexCount]; | |
| 263 memcpy(fIndices, src.fIndices, fIndexCount * sizeof(uint16_t)); | |
| 264 | |
| 265 return *this; | |
| 266 } | |
| 267 | |
| 268 void Mesh::init(const SkRect& bounds, int rows, int cols, | |
| 269 const SkRect& texture) { | |
| 270 SkASSERT(rows > 0 && cols > 0); | |
| 271 | |
| 272 fBounds = bounds; | |
| 273 fRows = rows; | |
| 274 fCols = cols; | |
| 275 | |
| 276 delete[] fPts; | |
| 277 fCount = (rows + 1) * (cols + 1); | |
| 278 fPts = new SkPoint[fCount * 2]; | |
| 279 fTex = fPts + fCount; | |
| 280 | |
| 281 delete[] fIndices; | |
| 282 fIndexCount = rows * cols * 6; | |
| 283 fIndices = new uint16_t[fIndexCount]; | |
| 284 | |
| 285 SkPoint* pts = fPts; | |
| 286 const SkScalar dx = bounds.width() / rows; | |
| 287 const SkScalar dy = bounds.height() / cols; | |
| 288 SkPoint* tex = fTex; | |
| 289 const SkScalar dtx = texture.width() / rows; | |
| 290 const SkScalar dty = texture.height() / cols; | |
| 291 uint16_t* idx = fIndices; | |
| 292 int index = 0; | |
| 293 for (int y = 0; y <= cols; y++) { | |
| 294 for (int x = 0; x <= rows; x++) { | |
| 295 pts->set(bounds.fLeft + x*dx, bounds.fTop + y*dy); | |
| 296 pts += 1; | |
| 297 tex->set(texture.fLeft + x*dtx, texture.fTop + y*dty); | |
| 298 tex += 1; | |
| 299 | |
| 300 if (y < cols && x < rows) { | |
| 301 *idx++ = index; | |
| 302 *idx++ = index + rows + 1; | |
| 303 *idx++ = index + 1; | |
| 304 | |
| 305 *idx++ = index + 1; | |
| 306 *idx++ = index + rows + 1; | |
| 307 *idx++ = index + rows + 2; | |
| 308 | |
| 309 index += 1; | |
| 310 } | |
| 311 } | |
| 312 index += 1; | |
| 313 } | |
| 314 } | |
| 315 | |
| 316 void Mesh::draw(SkCanvas* canvas, const SkPaint& paint) { | |
| 317 canvas->drawVertices(SkCanvas::kTriangles_VertexMode, fCount, | |
| 318 fPts, fTex, NULL, NULL, fIndices, fIndexCount, | |
| 319 paint); | |
| 320 } | |
| 321 | |
| 322 void Mesh::drawWireframe(SkCanvas* canvas, const SkPaint& paint) { | |
| 323 canvas->drawVertices(SkCanvas::kTriangles_VertexMode, fCount, | |
| 324 fPts, NULL, NULL, NULL, fIndices, fIndexCount, | |
| 325 paint); | |
| 326 } | |
| 327 | |
| 328 /////////////////////////////////////////////////////////////////////////////// | |
| 329 | |
| 330 class WarpView : public SkView { | |
| 331 Mesh fMesh, fOrig; | |
| 332 SkBitmap fBitmap; | |
| 333 SkMatrix fMatrix, fInverse; | |
| 334 public: | |
| 335 WarpView() { | |
| 336 SkBitmap bm; | |
| 337 // SkImageDecoder::DecodeFile("/skimages/marker.png", &bm); | |
| 338 SkImageDecoder::DecodeFile("/skimages/logo.gif", &bm); | |
| 339 // SkImageDecoder::DecodeFile("/beach_shot.JPG", &bm); | |
| 340 fBitmap = bm; | |
| 341 | |
| 342 SkRect bounds, texture; | |
| 343 texture.set(0, 0, SkIntToScalar(fBitmap.width()), | |
| 344 SkIntToScalar(fBitmap.height())); | |
| 345 bounds = texture; | |
| 346 | |
| 347 // fMesh.init(bounds, fBitmap.width() / 40, fBitmap.height() / 40, textur
e); | |
| 348 fMesh.init(bounds, fBitmap.width()/16, fBitmap.height()/16, texture); | |
| 349 fOrig = fMesh; | |
| 350 | |
| 351 fP0.set(0, 0); | |
| 352 fP1 = fP0; | |
| 353 | |
| 354 fMatrix.setScale(2, 2); | |
| 355 fMatrix.invert(&fInverse); | |
| 356 } | |
| 357 | |
| 358 protected: | |
| 359 // overrides from SkEventSink | |
| 360 virtual bool onQuery(SkEvent* evt) { | |
| 361 if (SampleCode::TitleQ(*evt)) { | |
| 362 SampleCode::TitleR(evt, "Warp"); | |
| 363 return true; | |
| 364 } | |
| 365 return this->INHERITED::onQuery(evt); | |
| 366 } | |
| 367 | |
| 368 static SkPoint apply_warp(const SkVector& drag, SkScalar dragLength, | |
| 369 const SkPoint& dragStart, const SkPoint& dragCurr, | |
| 370 const SkPoint& orig) { | |
| 371 SkVector delta = orig - dragCurr; | |
| 372 SkScalar length = SkPoint::Normalize(&delta); | |
| 373 if (length <= kNearlyZero) { | |
| 374 return orig; | |
| 375 } | |
| 376 | |
| 377 const SkScalar period = 20; | |
| 378 const SkScalar mag = dragLength / 3; | |
| 379 | |
| 380 SkScalar d = length / (period); | |
| 381 d = mag * SkScalarSin(d) / d; | |
| 382 SkScalar dx = delta.fX * d; | |
| 383 SkScalar dy = delta.fY * d; | |
| 384 SkScalar px = orig.fX + dx; | |
| 385 SkScalar py = orig.fY + dy; | |
| 386 return SkPoint::Make(px, py); | |
| 387 } | |
| 388 | |
| 389 static SkPoint apply_warp2(const SkVector& drag, SkScalar dragLength, | |
| 390 const SkPoint& dragStart, const SkPoint& dragCurr, | |
| 391 const SkPoint& orig) { | |
| 392 SkVector delta = orig - dragCurr; | |
| 393 SkScalar length = SkPoint::Normalize(&delta); | |
| 394 if (length <= kNearlyZero) { | |
| 395 return orig; | |
| 396 } | |
| 397 | |
| 398 const SkScalar period = 10 + dragLength/4; | |
| 399 const SkScalar mag = dragLength / 3; | |
| 400 | |
| 401 SkScalar d = length / (period); | |
| 402 if (d > SK_ScalarPI) { | |
| 403 d = SK_ScalarPI; | |
| 404 } | |
| 405 | |
| 406 d = -mag * SkScalarSin(d); | |
| 407 | |
| 408 SkScalar dx = delta.fX * d; | |
| 409 SkScalar dy = delta.fY * d; | |
| 410 SkScalar px = orig.fX + dx; | |
| 411 SkScalar py = orig.fY + dy; | |
| 412 return SkPoint::Make(px, py); | |
| 413 } | |
| 414 | |
| 415 typedef SkPoint (*WarpProc)(const SkVector& drag, SkScalar dragLength, | |
| 416 const SkPoint& dragStart, const SkPoint& dragCurr, | |
| 417 const SkPoint& orig); | |
| 418 | |
| 419 void warp(const SkPoint& p0, const SkPoint& p1) { | |
| 420 WarpProc proc = apply_warp2; | |
| 421 SkPoint delta = p1 - p0; | |
| 422 SkScalar length = SkPoint::Normalize(&delta); | |
| 423 for (int y = 0; y < fMesh.rows(); y++) { | |
| 424 for (int x = 0; x < fMesh.cols(); x++) { | |
| 425 fMesh.pt(x, y) = proc(delta, length, p0, p1, fOrig.pt(x, y)); | |
| 426 } | |
| 427 } | |
| 428 fP0 = p0; | |
| 429 fP1 = p1; | |
| 430 } | |
| 431 | |
| 432 virtual void onDraw(SkCanvas* canvas) { | |
| 433 canvas->drawColor(SK_ColorLTGRAY); | |
| 434 // test_bigblur(canvas); return; | |
| 435 | |
| 436 canvas->concat(fMatrix); | |
| 437 | |
| 438 SkPaint paint; | |
| 439 paint.setFilterBitmap(true); | |
| 440 paint.setShader(SkShader::CreateBitmapShader(fBitmap, | |
| 441 SkShader::kClamp_TileMode, | |
| 442 SkShader::kClamp_TileMode))
->unref(); | |
| 443 fMesh.draw(canvas, paint); //return; | |
| 444 | |
| 445 paint.setShader(NULL); | |
| 446 paint.setColor(SK_ColorRED); | |
| 447 fMesh.draw(canvas, paint); | |
| 448 | |
| 449 // test_drag(canvas, fBitmap, fP0, fP1); | |
| 450 } | |
| 451 | |
| 452 virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) { | |
| 453 return new Click(this); | |
| 454 } | |
| 455 | |
| 456 virtual bool onClick(Click* click) { | |
| 457 SkPoint pts[2] = { click->fOrig, click->fCurr }; | |
| 458 fInverse.mapPoints(pts, 2); | |
| 459 this->warp(pts[0], pts[1]); | |
| 460 this->inval(NULL); | |
| 461 return true; | |
| 462 } | |
| 463 | |
| 464 private: | |
| 465 SkIRect fBase, fRect; | |
| 466 SkPoint fP0, fP1; | |
| 467 typedef SkView INHERITED; | |
| 468 }; | |
| 469 | |
| 470 ////////////////////////////////////////////////////////////////////////////// | |
| 471 | |
| 472 static SkView* MyFactory() { return new WarpView; } | |
| 473 static SkViewRegister reg(MyFactory); | |
| OLD | NEW |
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Chromium Code Reviews
Issue 901933004:
migrate more samples over to SkAnimTImer (Closed)
Base URL: https://skia.googlesource.com/skia.git@master