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| 1 /* |
| 2 * Copyright 2014 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 |
| 8 #include "GrDashingEffect.h" |
| 9 |
| 10 #include "gl/GrGLEffect.h" |
| 11 #include "gl/GrGLSL.h" |
| 12 #include "GrContext.h" |
| 13 #include "GrCoordTransform.h" |
| 14 #include "GrDrawTargetCaps.h" |
| 15 #include "GrEffect.h" |
| 16 #include "GrTBackendEffectFactory.h" |
| 17 #include "SkGpuDevice.h" |
| 18 #include "SkGr.h" |
| 19 |
| 20 /////////////////////////////////////////////////////////////////////////////// |
| 21 |
| 22 static void calc_dash_scaling(SkScalar* parallelScale, SkScalar* perpScale, |
| 23 const SkMatrix& viewMatrix, const SkPoint pts[2]) { |
| 24 SkVector vecSrc = pts[1] - pts[0]; |
| 25 SkScalar magSrc = vecSrc.length(); |
| 26 SkScalar invSrc = magSrc ? SkScalarInvert(magSrc) : 0; |
| 27 vecSrc.scale(invSrc); |
| 28 |
| 29 SkVector vecSrcPerp; |
| 30 vecSrc.rotateCW(&vecSrcPerp); |
| 31 viewMatrix.mapVectors(&vecSrc, 1); |
| 32 viewMatrix.mapVectors(&vecSrcPerp, 1); |
| 33 |
| 34 // parallelScale tells how much to scale along the line parallel to the dash
line |
| 35 // perpScale tells how much to scale in the direction perpendicular to the d
ash line |
| 36 *parallelScale = vecSrc.length(); |
| 37 *perpScale = vecSrcPerp.length(); |
| 38 } |
| 39 |
| 40 // calculates the rotation needed to aligned pts to the x axis with pts[0] < pts
[1] |
| 41 // Stores the rotation matrix in rotMatrix, and the mapped points in ptsRot |
| 42 static void align_to_x_axis(const SkPoint pts[2], SkMatrix* rotMatrix, SkPoint p
tsRot[2] = NULL) { |
| 43 SkVector vec = pts[1] - pts[0]; |
| 44 SkScalar mag = vec.length(); |
| 45 SkScalar inv = mag ? SkScalarInvert(mag) : 0; |
| 46 |
| 47 vec.scale(inv); |
| 48 rotMatrix->setSinCos(-vec.fY, vec.fX, pts[0].fX, pts[0].fY); |
| 49 if (ptsRot) { |
| 50 rotMatrix->mapPoints(ptsRot, pts, 2); |
| 51 // correction for numerical issues if map doesn't make ptsRot exactly ho
rizontal |
| 52 ptsRot[1].fY = pts[0].fY; |
| 53 } |
| 54 } |
| 55 |
| 56 // Assumes phase < sum of all intervals |
| 57 static SkScalar calc_start_adjustment(const SkPathEffect::DashInfo& info) { |
| 58 SkASSERT(info.fPhase < info.fIntervals[0] + info.fIntervals[1]); |
| 59 if (info.fPhase >= info.fIntervals[0] && info.fPhase != 0) { |
| 60 SkScalar srcIntervalLen = info.fIntervals[0] + info.fIntervals[1]; |
| 61 return srcIntervalLen - info.fPhase; |
| 62 } |
| 63 return 0; |
| 64 } |
| 65 |
| 66 static SkScalar calc_end_adjustment(const SkPathEffect::DashInfo& info, const Sk
Point pts[2], SkScalar* endingInt) { |
| 67 if (pts[1].fX <= pts[0].fX) { |
| 68 return 0; |
| 69 } |
| 70 SkScalar srcIntervalLen = info.fIntervals[0] + info.fIntervals[1]; |
| 71 SkScalar totalLen = pts[1].fX - pts[0].fX; |
| 72 SkScalar temp = SkScalarDiv(totalLen, srcIntervalLen); |
| 73 SkScalar numFullIntervals = SkScalarFloorToScalar(temp); |
| 74 *endingInt = totalLen - numFullIntervals * srcIntervalLen + info.fPhase; |
| 75 temp = SkScalarDiv(*endingInt, srcIntervalLen); |
| 76 *endingInt = *endingInt - SkScalarFloorToScalar(temp) * srcIntervalLen; |
| 77 if (0 == *endingInt) { |
| 78 *endingInt = srcIntervalLen; |
| 79 } |
| 80 if (*endingInt > info.fIntervals[0]) { |
| 81 if (0 == info.fIntervals[0]) { |
| 82 *endingInt -= 0.01; // make sure we capture the last zero size pnt (
used if has caps) |
| 83 } |
| 84 return *endingInt - info.fIntervals[0]; |
| 85 } |
| 86 return 0; |
| 87 } |
| 88 |
| 89 |
| 90 bool GrDashingEffect::DrawDashLine(const SkPoint pts[2], const SkPaint& paint, S
kGpuDevice* dev) { |
| 91 GrContext* context = dev->context(); |
| 92 if (context->getRenderTarget()->isMultisampled()) { |
| 93 return false; |
| 94 } |
| 95 |
| 96 const SkMatrix& viewMatrix = context->getMatrix(); |
| 97 if (!viewMatrix.preservesRightAngles()) { |
| 98 return false; |
| 99 } |
| 100 |
| 101 const SkPathEffect* pe = paint.getPathEffect(); |
| 102 SkPathEffect::DashInfo info; |
| 103 SkPathEffect::DashType dashType = pe->asADash(&info); |
| 104 // Must be a dash effect with 2 intervals (1 on and 1 off) |
| 105 if (SkPathEffect::kDash_DashType != dashType || 2 != info.fCount) { |
| 106 return false; |
| 107 } |
| 108 |
| 109 SkPaint::Cap cap = paint.getStrokeCap(); |
| 110 // Current we do don't handle Round or Square cap dashes |
| 111 if (SkPaint::kRound_Cap == cap) { |
| 112 return false; |
| 113 } |
| 114 |
| 115 SkScalar srcStrokeWidth = paint.getStrokeWidth(); |
| 116 |
| 117 // Get all info about the dash effect |
| 118 SkAutoTArray<SkScalar> intervals(info.fCount); |
| 119 info.fIntervals = intervals.get(); |
| 120 pe->asADash(&info); |
| 121 |
| 122 // the phase should be normalized to be [0, sum of all intervals) |
| 123 SkASSERT(info.fPhase >= 0 && info.fPhase < info.fIntervals[0] + info.fInterv
als[1]); |
| 124 |
| 125 SkMatrix coordTrans; |
| 126 |
| 127 // Rotate the src pts so they are aligned horizontally with pts[0].fX < pts[
1].fX |
| 128 SkMatrix srcRotInv; |
| 129 SkPoint ptsRot[2]; |
| 130 if (pts[0].fY != pts[1].fY || pts[0].fX > pts[1].fX) { |
| 131 align_to_x_axis(pts, &coordTrans, ptsRot); |
| 132 if(!coordTrans.invert(&srcRotInv)) { |
| 133 return false; |
| 134 } |
| 135 } else { |
| 136 coordTrans.reset(); |
| 137 srcRotInv.reset(); |
| 138 memcpy(ptsRot, pts, 2 * sizeof(SkPoint)); |
| 139 } |
| 140 |
| 141 GrPaint grPaint; |
| 142 SkPaint2GrPaintShader(dev, paint, true, &grPaint); |
| 143 |
| 144 bool useAA = paint.isAntiAlias(); |
| 145 |
| 146 // Scale corrections of intervals and stroke from view matrix |
| 147 SkScalar parallelScale; |
| 148 SkScalar perpScale; |
| 149 calc_dash_scaling(¶llelScale, &perpScale, viewMatrix, ptsRot); |
| 150 |
| 151 bool hasCap = SkPaint::kSquare_Cap == cap && 0 != srcStrokeWidth; |
| 152 |
| 153 // We always want to at least stroke out half a pixel on each side in device
space |
| 154 // so 0.5f / perpScale gives us this min in src space |
| 155 SkScalar halfStroke = SkMaxScalar(srcStrokeWidth * 0.5f, 0.5f / perpScale); |
| 156 |
| 157 SkScalar xStroke; |
| 158 if (!hasCap) { |
| 159 xStroke = 0.f; |
| 160 } else { |
| 161 xStroke = halfStroke; |
| 162 } |
| 163 |
| 164 // If we are using AA, check to see if we are drawing a partial dash at the
start. If so |
| 165 // draw it separately here and adjust our start point accordingly |
| 166 if (useAA) { |
| 167 if (info.fPhase > 0 && info.fPhase < info.fIntervals[0]) { |
| 168 SkPoint startPts[2]; |
| 169 startPts[0] = ptsRot[0]; |
| 170 startPts[1].fY = startPts[0].fY; |
| 171 startPts[1].fX = SkMinScalar(startPts[0].fX + info.fIntervals[0] - i
nfo.fPhase, |
| 172 ptsRot[1].fX); |
| 173 SkRect startRect; |
| 174 startRect.set(startPts, 2); |
| 175 startRect.outset(xStroke, halfStroke); |
| 176 context->drawRect(grPaint, startRect, NULL, &srcRotInv); |
| 177 |
| 178 ptsRot[0].fX += info.fIntervals[0] + info.fIntervals[1] - info.fPhas
e; |
| 179 info.fPhase = 0; |
| 180 } |
| 181 } |
| 182 |
| 183 // adjustments for start and end of bounding rect so we only draw dash inter
vals |
| 184 // contained in the original line segment. |
| 185 SkScalar startAdj = calc_start_adjustment(info); |
| 186 SkScalar endingInterval = 0; |
| 187 SkScalar endAdj = calc_end_adjustment(info, ptsRot, &endingInterval); |
| 188 if (ptsRot[0].fX + startAdj >= ptsRot[1].fX - endAdj) { |
| 189 // Nothing left to draw so just return |
| 190 return true; |
| 191 } |
| 192 |
| 193 // If we are using AA, check to see if we are drawing a partial dash at then
end. If so |
| 194 // draw it separately here and adjust our end point accordingly |
| 195 if (useAA) { |
| 196 // If we adjusted the end then we will not be drawing a partial dash at
the end. |
| 197 // If we didn't adjust the end point then we just need to make sure the
ending |
| 198 // dash isn't a full dash |
| 199 if (0 == endAdj && endingInterval != info.fIntervals[0]) { |
| 200 |
| 201 SkPoint endPts[2]; |
| 202 endPts[1] = ptsRot[1]; |
| 203 endPts[0].fY = endPts[1].fY; |
| 204 endPts[0].fX = endPts[1].fX - endingInterval; |
| 205 |
| 206 SkRect endRect; |
| 207 endRect.set(endPts, 2); |
| 208 endRect.outset(xStroke, halfStroke); |
| 209 context->drawRect(grPaint, endRect, NULL, &srcRotInv); |
| 210 |
| 211 ptsRot[1].fX -= endingInterval + info.fIntervals[1]; |
| 212 if (ptsRot[0].fX >= ptsRot[1].fX) { |
| 213 // Nothing left to draw so just return |
| 214 return true; |
| 215 } |
| 216 } |
| 217 } |
| 218 coordTrans.postConcat(viewMatrix); |
| 219 |
| 220 SkPoint devicePts[2]; |
| 221 viewMatrix.mapPoints(devicePts, ptsRot, 2); |
| 222 |
| 223 info.fIntervals[0] *= parallelScale; |
| 224 info.fIntervals[1] *= parallelScale; |
| 225 info.fPhase *= parallelScale; |
| 226 SkScalar strokeWidth = srcStrokeWidth * perpScale; |
| 227 |
| 228 if ((strokeWidth < 1.f && !useAA) || 0.f == strokeWidth) { |
| 229 strokeWidth = 1.f; |
| 230 } |
| 231 |
| 232 // Set up coordTransform for device space transforms |
| 233 // We rotate the dashed line such that it is horizontal with the start point
at smaller x |
| 234 // then we translate the start point to the origin |
| 235 if (devicePts[0].fY != devicePts[1].fY || devicePts[0].fX > devicePts[1].fX)
{ |
| 236 SkMatrix rot; |
| 237 align_to_x_axis(devicePts, &rot); |
| 238 coordTrans.postConcat(rot); |
| 239 } |
| 240 coordTrans.postTranslate(-devicePts[0].fX, -devicePts[0].fY); |
| 241 coordTrans.postTranslate(info.fIntervals[1] * 0.5f + info.fPhase, 0); |
| 242 |
| 243 if (SkPaint::kSquare_Cap == cap && 0 != srcStrokeWidth) { |
| 244 // add cap to on interveal and remove from off interval |
| 245 info.fIntervals[0] += strokeWidth; |
| 246 info.fIntervals[1] -= strokeWidth; |
| 247 } |
| 248 |
| 249 if (info.fIntervals[1] > 0.f) { |
| 250 GrEffectEdgeType edgeType= useAA ? kFillAA_GrEffectEdgeType : |
| 251 kFillBW_GrEffectEdgeType; |
| 252 grPaint.addCoverageEffect( |
| 253 GrDashingEffect::Create(edgeType, info, coordTrans, strokeWidth))->u
nref(); |
| 254 grPaint.setAntiAlias(false); |
| 255 } |
| 256 |
| 257 SkRect rect; |
| 258 bool bloat = useAA && info.fIntervals[1] > 0.f; |
| 259 SkScalar bloatX = bloat ? 0.5f / parallelScale : 0.f; |
| 260 SkScalar bloatY = bloat ? 0.5f / perpScale : 0.f; |
| 261 ptsRot[0].fX += startAdj; |
| 262 ptsRot[1].fX -= endAdj; |
| 263 if (!hasCap) { |
| 264 xStroke = 0.f; |
| 265 } else { |
| 266 xStroke = halfStroke; |
| 267 } |
| 268 rect.set(ptsRot, 2); |
| 269 rect.outset(bloatX + xStroke, bloatY + halfStroke); |
| 270 context->drawRect(grPaint, rect, NULL, &srcRotInv); |
| 271 |
| 272 return true; |
| 273 } |
| 274 |
| 275 ////////////////////////////////////////////////////////////////////////////// |
| 276 |
| 277 class GLDashingLineEffect; |
| 278 |
| 279 class DashingLineEffect : public GrEffect { |
| 280 public: |
| 281 typedef SkPathEffect::DashInfo DashInfo; |
| 282 |
| 283 /** |
| 284 * The effect calculates the coverage for the case of a horizontal line in d
evice space. |
| 285 * The matrix that is passed in should be able to convert a line in source s
pace to a |
| 286 * horizontal line in device space. Additionally, the coord transform matrix
should translate |
| 287 * the the start of line to origin, and the shift it along the positive x-ax
is by the phase |
| 288 * and half the off interval. |
| 289 */ |
| 290 static GrEffectRef* Create(GrEffectEdgeType edgeType, const DashInfo& info, |
| 291 const SkMatrix& matrix, SkScalar strokeWidth); |
| 292 |
| 293 virtual ~DashingLineEffect(); |
| 294 |
| 295 static const char* Name() { return "DashingEffect"; } |
| 296 |
| 297 GrEffectEdgeType getEdgeType() const { return fEdgeType; } |
| 298 |
| 299 const SkRect& getRect() const { return fRect; } |
| 300 |
| 301 SkScalar getIntervalLength() const { return fIntervalLength; } |
| 302 |
| 303 typedef GLDashingLineEffect GLEffect; |
| 304 |
| 305 virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags
) const SK_OVERRIDE; |
| 306 |
| 307 virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE; |
| 308 |
| 309 private: |
| 310 DashingLineEffect(GrEffectEdgeType edgeType, const DashInfo& info, const SkM
atrix& matrix, |
| 311 SkScalar strokeWidth); |
| 312 |
| 313 virtual bool onIsEqual(const GrEffect& other) const SK_OVERRIDE; |
| 314 |
| 315 GrEffectEdgeType fEdgeType; |
| 316 GrCoordTransform fCoordTransform; |
| 317 SkRect fRect; |
| 318 SkScalar fIntervalLength; |
| 319 |
| 320 GR_DECLARE_EFFECT_TEST; |
| 321 |
| 322 typedef GrEffect INHERITED; |
| 323 }; |
| 324 |
| 325 ////////////////////////////////////////////////////////////////////////////// |
| 326 |
| 327 class GLDashingLineEffect : public GrGLEffect { |
| 328 public: |
| 329 GLDashingLineEffect(const GrBackendEffectFactory&, const GrDrawEffect&); |
| 330 |
| 331 virtual void emitCode(GrGLShaderBuilder* builder, |
| 332 const GrDrawEffect& drawEffect, |
| 333 EffectKey key, |
| 334 const char* outputColor, |
| 335 const char* inputColor, |
| 336 const TransformedCoordsArray&, |
| 337 const TextureSamplerArray&) SK_OVERRIDE; |
| 338 |
| 339 static inline EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&); |
| 340 |
| 341 virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVER
RIDE; |
| 342 |
| 343 private: |
| 344 GrGLUniformManager::UniformHandle fRectUniform; |
| 345 GrGLUniformManager::UniformHandle fIntervalUniform; |
| 346 SkRect fPrevRect; |
| 347 SkScalar fPrevIntervalLength; |
| 348 typedef GrGLEffect INHERITED; |
| 349 }; |
| 350 |
| 351 GLDashingLineEffect::GLDashingLineEffect(const GrBackendEffectFactory& factory, |
| 352 const GrDrawEffect& drawEffect) |
| 353 : INHERITED (factory) { |
| 354 fPrevRect.fLeft = SK_ScalarNaN; |
| 355 fPrevIntervalLength = SK_ScalarMax; |
| 356 |
| 357 } |
| 358 |
| 359 void GLDashingLineEffect::emitCode(GrGLShaderBuilder* builder, |
| 360 const GrDrawEffect& drawEffect, |
| 361 EffectKey key, |
| 362 const char* outputColor, |
| 363 const char* inputColor, |
| 364 const TransformedCoordsArray& coords, |
| 365 const TextureSamplerArray& samplers) { |
| 366 const DashingLineEffect& de = drawEffect.castEffect<DashingLineEffect>(); |
| 367 const char *rectName; |
| 368 // The rect uniform's xyzw refer to (left + 0.5, top + 0.5, right - 0.5, bot
tom - 0.5), |
| 369 // respectively. |
| 370 fRectUniform = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| 371 kVec4f_GrSLType, |
| 372 "rect", |
| 373 &rectName); |
| 374 const char *intervalName; |
| 375 // The interval uniform's refers to the total length of the interval (on + o
ff) |
| 376 fIntervalUniform = builder->addUniform(GrGLShaderBuilder::kFragment_Visibili
ty, |
| 377 kFloat_GrSLType, |
| 378 "interval", |
| 379 &intervalName); |
| 380 // transforms all points so that we can compare them to our test rect |
| 381 builder->fsCodeAppendf("\t\tfloat xShifted = %s.x - floor(%s.x / %s) * %s;\n
", |
| 382 coords[0].c_str(), coords[0].c_str(), intervalName, i
ntervalName); |
| 383 builder->fsCodeAppendf("\t\tvec2 fragPosShifted = vec2(xShifted, %s.y);\n",
coords[0].c_str()); |
| 384 if (GrEffectEdgeTypeIsAA(de.getEdgeType())) { |
| 385 // The amount of coverage removed in x and y by the edges is computed as
a pair of negative |
| 386 // numbers, xSub and ySub. |
| 387 builder->fsCodeAppend("\t\tfloat xSub, ySub;\n"); |
| 388 builder->fsCodeAppendf("\t\txSub = min(fragPosShifted.x - %s.x, 0.0);\n"
, rectName); |
| 389 builder->fsCodeAppendf("\t\txSub += min(%s.z - fragPosShifted.x, 0.0);\n
", rectName); |
| 390 builder->fsCodeAppendf("\t\tySub = min(fragPosShifted.y - %s.y, 0.0);\n"
, rectName); |
| 391 builder->fsCodeAppendf("\t\tySub += min(%s.w - fragPosShifted.y, 0.0);\n
", rectName); |
| 392 // Now compute coverage in x and y and multiply them to get the fraction
of the pixel |
| 393 // covered. |
| 394 builder->fsCodeAppendf("\t\tfloat alpha = (1.0 + max(xSub, -1.0)) * (1.0
+ max(ySub, -1.0));\n"); |
| 395 } else { |
| 396 // Assuming the bounding geometry is tight so no need to check y values |
| 397 builder->fsCodeAppendf("\t\tfloat alpha = 1.0;\n"); |
| 398 builder->fsCodeAppendf("\t\talpha *= (fragPosShifted.x - %s.x) > -0.5 ?
1.0 : 0.0;\n", rectName); |
| 399 builder->fsCodeAppendf("\t\talpha *= (%s.z - fragPosShifted.x) >= -0.5 ?
1.0 : 0.0;\n", rectName); |
| 400 } |
| 401 builder->fsCodeAppendf("\t\t%s = %s;\n", outputColor, |
| 402 (GrGLSLExpr4(inputColor) * GrGLSLExpr1("alpha")).c_st
r()); |
| 403 } |
| 404 |
| 405 void GLDashingLineEffect::setData(const GrGLUniformManager& uman, const GrDrawEf
fect& drawEffect) { |
| 406 const DashingLineEffect& de = drawEffect.castEffect<DashingLineEffect>(); |
| 407 const SkRect& rect = de.getRect(); |
| 408 SkScalar intervalLength = de.getIntervalLength(); |
| 409 if (rect != fPrevRect || intervalLength != fPrevIntervalLength) { |
| 410 uman.set4f(fRectUniform, rect.fLeft + 0.5f, rect.fTop + 0.5f, |
| 411 rect.fRight - 0.5f, rect.fBottom - 0.5f); |
| 412 uman.set1f(fIntervalUniform, intervalLength); |
| 413 fPrevRect = rect; |
| 414 fPrevIntervalLength = intervalLength; |
| 415 } |
| 416 } |
| 417 |
| 418 GrGLEffect::EffectKey GLDashingLineEffect::GenKey(const GrDrawEffect& drawEffect
, |
| 419 const GrGLCaps&) { |
| 420 const DashingLineEffect& de = drawEffect.castEffect<DashingLineEffect>(); |
| 421 return de.getEdgeType(); |
| 422 } |
| 423 |
| 424 ////////////////////////////////////////////////////////////////////////////// |
| 425 |
| 426 GrEffectRef* DashingLineEffect::Create(GrEffectEdgeType edgeType, const DashInfo
& info, |
| 427 const SkMatrix& matrix, SkScalar strokeWidt
h) { |
| 428 if (info.fCount != 2) { |
| 429 return NULL; |
| 430 } |
| 431 |
| 432 return CreateEffectRef(AutoEffectUnref(SkNEW_ARGS(DashingLineEffect, |
| 433 (edgeType, info, matrix, s
trokeWidth)))); |
| 434 } |
| 435 |
| 436 DashingLineEffect::~DashingLineEffect() {} |
| 437 |
| 438 void DashingLineEffect::getConstantColorComponents(GrColor* color, uint32_t* val
idFlags) const { |
| 439 *validFlags = 0; |
| 440 } |
| 441 |
| 442 const GrBackendEffectFactory& DashingLineEffect::getFactory() const { |
| 443 return GrTBackendEffectFactory<DashingLineEffect>::getInstance(); |
| 444 } |
| 445 |
| 446 DashingLineEffect::DashingLineEffect(GrEffectEdgeType edgeType, const DashInfo&
info, |
| 447 const SkMatrix& matrix, SkScalar strokeWidth) |
| 448 : fEdgeType(edgeType) |
| 449 , fCoordTransform(kLocal_GrCoordSet, matrix) { |
| 450 SkScalar onLen = info.fIntervals[0]; |
| 451 SkScalar offLen = info.fIntervals[1]; |
| 452 SkScalar halfOffLen = SkScalarHalf(offLen); |
| 453 SkScalar halfStroke = SkScalarHalf(strokeWidth); |
| 454 fIntervalLength = onLen + offLen; |
| 455 fRect.set(halfOffLen, -halfStroke, halfOffLen + onLen, halfStroke); |
| 456 |
| 457 addCoordTransform(&fCoordTransform); |
| 458 } |
| 459 |
| 460 bool DashingLineEffect::onIsEqual(const GrEffect& other) const { |
| 461 const DashingLineEffect& de = CastEffect<DashingLineEffect>(other); |
| 462 return (fEdgeType == de.fEdgeType && |
| 463 fCoordTransform == de.fCoordTransform && |
| 464 fRect == de.fRect && |
| 465 fIntervalLength == de.fIntervalLength); |
| 466 } |
| 467 |
| 468 GR_DEFINE_EFFECT_TEST(DashingLineEffect); |
| 469 |
| 470 GrEffectRef* DashingLineEffect::TestCreate(SkRandom* random, |
| 471 GrContext*, |
| 472 const GrDrawTargetCaps& caps, |
| 473 GrTexture*[]) { |
| 474 GrEffectRef* effect; |
| 475 SkMatrix m; |
| 476 m.reset(); |
| 477 GrEffectEdgeType edgeType = static_cast<GrEffectEdgeType>(random->nextULessT
han( |
| 478 kGrEffectEdgeTypeCnt)); |
| 479 SkScalar strokeWidth = random->nextRangeScalar(0, 100.f); |
| 480 DashInfo info; |
| 481 info.fCount = 2; |
| 482 SkAutoTArray<SkScalar> intervals(info.fCount); |
| 483 info.fIntervals = intervals.get(); |
| 484 info.fIntervals[0] = random->nextRangeScalar(0, 10.f); |
| 485 info.fIntervals[1] = random->nextRangeScalar(0, 10.f); |
| 486 info.fPhase = random->nextRangeScalar(0, info.fIntervals[0] + info.fInterval
s[1]); |
| 487 |
| 488 effect = DashingLineEffect::Create(edgeType, info, m, strokeWidth); |
| 489 return effect; |
| 490 } |
| 491 |
| 492 ////////////////////////////////////////////////////////////////////////////// |
| 493 |
| 494 GrEffectRef* GrDashingEffect::Create(GrEffectEdgeType edgeType, const SkPathEffe
ct::DashInfo& info, |
| 495 const SkMatrix& matrix, SkScalar strokeWidt
h) { |
| 496 return DashingLineEffect::Create(edgeType, info, matrix, strokeWidth); |
| 497 } |
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