SkMatrixConvolutionImageFilter.cpp revision f910d3b23bcf590ee937628dbab8e39a98ee5860
1/* 2 * Copyright 2012 The Android Open Source Project 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 "SkMatrixConvolutionImageFilter.h" 9#include "SkBitmap.h" 10#include "SkColorPriv.h" 11#include "SkFlattenableBuffers.h" 12#include "SkRect.h" 13#include "SkUnPreMultiply.h" 14 15#if SK_SUPPORT_GPU 16#include "gl/GrGLEffect.h" 17#include "gl/GrGLEffectMatrix.h" 18#include "effects/GrSingleTextureEffect.h" 19#include "GrTBackendEffectFactory.h" 20#include "GrTexture.h" 21#include "SkMatrix.h" 22 23#endif 24 25SkMatrixConvolutionImageFilter::SkMatrixConvolutionImageFilter(const SkISize& kernelSize, const SkScalar* kernel, SkScalar gain, SkScalar bias, const SkIPoint& target, TileMode tileMode, bool convolveAlpha, SkImageFilter* input) 26 : INHERITED(input), 27 fKernelSize(kernelSize), 28 fGain(gain), 29 fBias(bias), 30 fTarget(target), 31 fTileMode(tileMode), 32 fConvolveAlpha(convolveAlpha) { 33 uint32_t size = fKernelSize.fWidth * fKernelSize.fHeight; 34 fKernel = SkNEW_ARRAY(SkScalar, size); 35 memcpy(fKernel, kernel, size * sizeof(SkScalar)); 36 SkASSERT(kernelSize.fWidth >= 1 && kernelSize.fHeight >= 1); 37 SkASSERT(target.fX >= 0 && target.fX < kernelSize.fWidth); 38 SkASSERT(target.fY >= 0 && target.fY < kernelSize.fHeight); 39} 40 41SkMatrixConvolutionImageFilter::SkMatrixConvolutionImageFilter(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) { 42 fKernelSize.fWidth = buffer.readInt(); 43 fKernelSize.fHeight = buffer.readInt(); 44 uint32_t size = fKernelSize.fWidth * fKernelSize.fHeight; 45 fKernel = SkNEW_ARRAY(SkScalar, size); 46 SkDEBUGCODE(uint32_t readSize = )buffer.readScalarArray(fKernel); 47 SkASSERT(readSize == size); 48 fGain = buffer.readScalar(); 49 fBias = buffer.readScalar(); 50 fTarget.fX = buffer.readInt(); 51 fTarget.fY = buffer.readInt(); 52 fTileMode = (TileMode) buffer.readInt(); 53 fConvolveAlpha = buffer.readBool(); 54} 55 56void SkMatrixConvolutionImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const { 57 this->INHERITED::flatten(buffer); 58 buffer.writeInt(fKernelSize.fWidth); 59 buffer.writeInt(fKernelSize.fHeight); 60 buffer.writeScalarArray(fKernel, fKernelSize.fWidth * fKernelSize.fHeight); 61 buffer.writeScalar(fGain); 62 buffer.writeScalar(fBias); 63 buffer.writeInt(fTarget.fX); 64 buffer.writeInt(fTarget.fY); 65 buffer.writeInt((int) fTileMode); 66 buffer.writeBool(fConvolveAlpha); 67} 68 69SkMatrixConvolutionImageFilter::~SkMatrixConvolutionImageFilter() { 70 delete[] fKernel; 71} 72 73class UncheckedPixelFetcher { 74public: 75 static inline SkPMColor fetch(const SkBitmap& src, int x, int y) { 76 return *src.getAddr32(x, y); 77 } 78}; 79 80class ClampPixelFetcher { 81public: 82 static inline SkPMColor fetch(const SkBitmap& src, int x, int y) { 83 x = SkClampMax(x, src.width() - 1); 84 y = SkClampMax(y, src.height() - 1); 85 return *src.getAddr32(x, y); 86 } 87}; 88 89class RepeatPixelFetcher { 90public: 91 static inline SkPMColor fetch(const SkBitmap& src, int x, int y) { 92 x %= src.width(); 93 y %= src.height(); 94 if (x < 0) { 95 x += src.width(); 96 } 97 if (y < 0) { 98 y += src.height(); 99 } 100 return *src.getAddr32(x, y); 101 } 102}; 103 104class ClampToBlackPixelFetcher { 105public: 106 static inline SkPMColor fetch(const SkBitmap& src, int x, int y) { 107 if (x < 0 || x >= src.width() || y < 0 || y >= src.height()) { 108 return 0; 109 } else { 110 return *src.getAddr32(x, y); 111 } 112 } 113}; 114 115template<class PixelFetcher, bool convolveAlpha> 116void SkMatrixConvolutionImageFilter::filterPixels(const SkBitmap& src, SkBitmap* result, const SkIRect& rect) { 117 for (int y = rect.fTop; y < rect.fBottom; ++y) { 118 SkPMColor* dptr = result->getAddr32(rect.fLeft, y); 119 for (int x = rect.fLeft; x < rect.fRight; ++x) { 120 SkScalar sumA = 0, sumR = 0, sumG = 0, sumB = 0; 121 for (int cy = 0; cy < fKernelSize.fHeight; cy++) { 122 for (int cx = 0; cx < fKernelSize.fWidth; cx++) { 123 SkPMColor s = PixelFetcher::fetch(src, x + cx - fTarget.fX, y + cy - fTarget.fY); 124 SkScalar k = fKernel[cy * fKernelSize.fWidth + cx]; 125 if (convolveAlpha) { 126 sumA += SkScalarMul(SkIntToScalar(SkGetPackedA32(s)), k); 127 } 128 sumR += SkScalarMul(SkIntToScalar(SkGetPackedR32(s)), k); 129 sumG += SkScalarMul(SkIntToScalar(SkGetPackedG32(s)), k); 130 sumB += SkScalarMul(SkIntToScalar(SkGetPackedB32(s)), k); 131 } 132 } 133 int a = convolveAlpha 134 ? SkClampMax(SkScalarFloorToInt(SkScalarMul(sumA, fGain) + fBias), 255) 135 : 255; 136 int r = SkClampMax(SkScalarFloorToInt(SkScalarMul(sumR, fGain) + fBias), a); 137 int g = SkClampMax(SkScalarFloorToInt(SkScalarMul(sumG, fGain) + fBias), a); 138 int b = SkClampMax(SkScalarFloorToInt(SkScalarMul(sumB, fGain) + fBias), a); 139 if (!convolveAlpha) { 140 a = SkGetPackedA32(PixelFetcher::fetch(src, x, y)); 141 *dptr++ = SkPreMultiplyARGB(a, r, g, b); 142 } else { 143 *dptr++ = SkPackARGB32(a, r, g, b); 144 } 145 } 146 } 147} 148 149template<class PixelFetcher> 150void SkMatrixConvolutionImageFilter::filterPixels(const SkBitmap& src, SkBitmap* result, const SkIRect& rect) { 151 if (fConvolveAlpha) { 152 filterPixels<PixelFetcher, true>(src, result, rect); 153 } else { 154 filterPixels<PixelFetcher, false>(src, result, rect); 155 } 156} 157 158void SkMatrixConvolutionImageFilter::filterInteriorPixels(const SkBitmap& src, SkBitmap* result, const SkIRect& rect) { 159 filterPixels<UncheckedPixelFetcher>(src, result, rect); 160} 161 162void SkMatrixConvolutionImageFilter::filterBorderPixels(const SkBitmap& src, SkBitmap* result, const SkIRect& rect) { 163 switch (fTileMode) { 164 case kClamp_TileMode: 165 filterPixels<ClampPixelFetcher>(src, result, rect); 166 break; 167 case kRepeat_TileMode: 168 filterPixels<RepeatPixelFetcher>(src, result, rect); 169 break; 170 case kClampToBlack_TileMode: 171 filterPixels<ClampToBlackPixelFetcher>(src, result, rect); 172 break; 173 } 174} 175 176// FIXME: This should be refactored to SkImageFilterUtils for 177// use by other filters. For now, we assume the input is always 178// premultiplied and unpremultiply it 179static SkBitmap unpremultiplyBitmap(const SkBitmap& src) 180{ 181 SkAutoLockPixels alp(src); 182 if (!src.getPixels()) { 183 return SkBitmap(); 184 } 185 SkBitmap result; 186 result.setConfig(src.config(), src.width(), src.height()); 187 result.allocPixels(); 188 if (!result.getPixels()) { 189 return SkBitmap(); 190 } 191 for (int y = 0; y < src.height(); ++y) { 192 const uint32_t* srcRow = src.getAddr32(0, y); 193 uint32_t* dstRow = result.getAddr32(0, y); 194 for (int x = 0; x < src.width(); ++x) { 195 dstRow[x] = SkUnPreMultiply::PMColorToColor(srcRow[x]); 196 } 197 } 198 return result; 199} 200 201bool SkMatrixConvolutionImageFilter::onFilterImage(Proxy* proxy, 202 const SkBitmap& source, 203 const SkMatrix& matrix, 204 SkBitmap* result, 205 SkIPoint* loc) { 206 SkBitmap src = this->getInputResult(0, proxy, source, matrix, loc); 207 if (src.config() != SkBitmap::kARGB_8888_Config) { 208 return false; 209 } 210 211 if (!fConvolveAlpha && !src.isOpaque()) { 212 src = unpremultiplyBitmap(src); 213 } 214 215 SkAutoLockPixels alp(src); 216 if (!src.getPixels()) { 217 return false; 218 } 219 220 result->setConfig(src.config(), src.width(), src.height()); 221 result->allocPixels(); 222 223 SkIRect interior = SkIRect::MakeXYWH(fTarget.fX, fTarget.fY, 224 src.width() - fKernelSize.fWidth + 1, 225 src.height() - fKernelSize.fHeight + 1); 226 SkIRect top = SkIRect::MakeWH(src.width(), fTarget.fY); 227 SkIRect bottom = SkIRect::MakeLTRB(0, interior.bottom(), 228 src.width(), src.height()); 229 SkIRect left = SkIRect::MakeXYWH(0, interior.top(), 230 fTarget.fX, interior.height()); 231 SkIRect right = SkIRect::MakeLTRB(interior.right(), interior.top(), 232 src.width(), interior.bottom()); 233 filterBorderPixels(src, result, top); 234 filterBorderPixels(src, result, left); 235 filterInteriorPixels(src, result, interior); 236 filterBorderPixels(src, result, right); 237 filterBorderPixels(src, result, bottom); 238 return true; 239} 240 241#if SK_SUPPORT_GPU 242 243/////////////////////////////////////////////////////////////////////////////// 244 245class GrGLMatrixConvolutionEffect; 246 247class GrMatrixConvolutionEffect : public GrSingleTextureEffect { 248public: 249 typedef SkMatrixConvolutionImageFilter::TileMode TileMode; 250 static GrEffectRef* Create(GrTexture* texture, 251 const SkISize& kernelSize, 252 const SkScalar* kernel, 253 SkScalar gain, 254 SkScalar bias, 255 const SkIPoint& target, 256 TileMode tileMode, 257 bool convolveAlpha) { 258 AutoEffectUnref effect(SkNEW_ARGS(GrMatrixConvolutionEffect, (texture, 259 kernelSize, 260 kernel, 261 gain, 262 bias, 263 target, 264 tileMode, 265 convolveAlpha))); 266 return CreateEffectRef(effect); 267 } 268 virtual ~GrMatrixConvolutionEffect(); 269 270 virtual void getConstantColorComponents(GrColor* color, 271 uint32_t* validFlags) const SK_OVERRIDE { 272 // TODO: Try to do better? 273 *validFlags = 0; 274 } 275 276 static const char* Name() { return "MatrixConvolution"; } 277 const SkISize& kernelSize() const { return fKernelSize; } 278 const float* target() const { return fTarget; } 279 const float* kernel() const { return fKernel; } 280 float gain() const { return fGain; } 281 float bias() const { return fBias; } 282 TileMode tileMode() const { return fTileMode; } 283 bool convolveAlpha() const { return fConvolveAlpha; } 284 285 typedef GrGLMatrixConvolutionEffect GLEffect; 286 287 288 289 virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE; 290 291private: 292 GrMatrixConvolutionEffect(GrTexture*, 293 const SkISize& kernelSize, 294 const SkScalar* kernel, 295 SkScalar gain, 296 SkScalar bias, 297 const SkIPoint& target, 298 TileMode tileMode, 299 bool convolveAlpha); 300 301 virtual bool onIsEqual(const GrEffect&) const SK_OVERRIDE; 302 303 SkISize fKernelSize; 304 float *fKernel; 305 float fGain; 306 float fBias; 307 float fTarget[2]; 308 TileMode fTileMode; 309 bool fConvolveAlpha; 310 311 GR_DECLARE_EFFECT_TEST; 312 313 typedef GrSingleTextureEffect INHERITED; 314}; 315 316class GrGLMatrixConvolutionEffect : public GrGLEffect { 317public: 318 GrGLMatrixConvolutionEffect(const GrBackendEffectFactory& factory, 319 const GrEffectRef& effect); 320 virtual void emitCode(GrGLShaderBuilder*, 321 const GrEffectStage&, 322 EffectKey, 323 const char* vertexCoords, 324 const char* outputColor, 325 const char* inputColor, 326 const TextureSamplerArray&) SK_OVERRIDE; 327 328 static inline EffectKey GenKey(const GrEffectStage&, const GrGLCaps&); 329 330 virtual void setData(const GrGLUniformManager&, const GrEffectStage&) SK_OVERRIDE; 331 332private: 333 typedef GrGLUniformManager::UniformHandle UniformHandle; 334 typedef SkMatrixConvolutionImageFilter::TileMode TileMode; 335 SkISize fKernelSize; 336 TileMode fTileMode; 337 bool fConvolveAlpha; 338 339 UniformHandle fKernelUni; 340 UniformHandle fImageIncrementUni; 341 UniformHandle fTargetUni; 342 UniformHandle fGainUni; 343 UniformHandle fBiasUni; 344 345 GrGLEffectMatrix fEffectMatrix; 346 347 typedef GrGLEffect INHERITED; 348}; 349 350GrGLMatrixConvolutionEffect::GrGLMatrixConvolutionEffect(const GrBackendEffectFactory& factory, 351 const GrEffectRef& effect) 352 : INHERITED(factory) 353 , fKernelUni(GrGLUniformManager::kInvalidUniformHandle) 354 , fImageIncrementUni(GrGLUniformManager::kInvalidUniformHandle) 355 , fTargetUni(GrGLUniformManager::kInvalidUniformHandle) 356 , fGainUni(GrGLUniformManager::kInvalidUniformHandle) 357 , fBiasUni(GrGLUniformManager::kInvalidUniformHandle) { 358 const GrMatrixConvolutionEffect& m = CastEffect<GrMatrixConvolutionEffect>(effect); 359 fKernelSize = m.kernelSize(); 360 fTileMode = m.tileMode(); 361 fConvolveAlpha = m.convolveAlpha(); 362} 363 364static void appendTextureLookup(GrGLShaderBuilder* builder, 365 const GrGLShaderBuilder::TextureSampler& sampler, 366 const char* coord, 367 SkMatrixConvolutionImageFilter::TileMode tileMode) { 368 SkString clampedCoord; 369 switch (tileMode) { 370 case SkMatrixConvolutionImageFilter::kClamp_TileMode: 371 clampedCoord.printf("clamp(%s, 0.0, 1.0)", coord); 372 coord = clampedCoord.c_str(); 373 break; 374 case SkMatrixConvolutionImageFilter::kRepeat_TileMode: 375 clampedCoord.printf("fract(%s)", coord); 376 coord = clampedCoord.c_str(); 377 break; 378 case SkMatrixConvolutionImageFilter::kClampToBlack_TileMode: 379 builder->fsCodeAppendf("clamp(%s, 0.0, 1.0) != %s ? vec4(0, 0, 0, 0) : ", coord, coord); 380 break; 381 } 382 builder->appendTextureLookup(GrGLShaderBuilder::kFragment_ShaderType, sampler, coord); 383} 384 385void GrGLMatrixConvolutionEffect::emitCode(GrGLShaderBuilder* builder, 386 const GrEffectStage&, 387 EffectKey key, 388 const char* vertexCoords, 389 const char* outputColor, 390 const char* inputColor, 391 const TextureSamplerArray& samplers) { 392 const char* coords; 393 fEffectMatrix.emitCodeMakeFSCoords2D(builder, key, vertexCoords, &coords); 394 fImageIncrementUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, 395 kVec2f_GrSLType, "ImageIncrement"); 396 fKernelUni = builder->addUniformArray(GrGLShaderBuilder::kFragment_ShaderType, 397 kFloat_GrSLType, "Kernel", fKernelSize.width() * fKernelSize.height()); 398 fTargetUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, 399 kVec2f_GrSLType, "Target"); 400 fGainUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, 401 kFloat_GrSLType, "Gain"); 402 fBiasUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, 403 kFloat_GrSLType, "Bias"); 404 405 const char* target = builder->getUniformCStr(fTargetUni); 406 const char* imgInc = builder->getUniformCStr(fImageIncrementUni); 407 const char* kernel = builder->getUniformCStr(fKernelUni); 408 const char* gain = builder->getUniformCStr(fGainUni); 409 const char* bias = builder->getUniformCStr(fBiasUni); 410 int kWidth = fKernelSize.width(); 411 int kHeight = fKernelSize.height(); 412 413 builder->fsCodeAppend("\t\tvec4 sum = vec4(0, 0, 0, 0);\n"); 414 builder->fsCodeAppendf("\t\tvec2 coord = %s - %s * %s;\n", coords, target, imgInc); 415 builder->fsCodeAppendf("\t\tfor (int y = 0; y < %d; y++) {\n", kHeight); 416 builder->fsCodeAppendf("\t\t\tfor (int x = 0; x < %d; x++) {\n", kWidth); 417 builder->fsCodeAppendf("\t\t\t\tfloat k = %s[y * %d + x];\n", kernel, kWidth); 418 builder->fsCodeAppendf("\t\t\t\tvec2 coord2 = coord + vec2(x, y) * %s;\n", imgInc); 419 builder->fsCodeAppend("\t\t\t\tvec4 c = "); 420 appendTextureLookup(builder, samplers[0], "coord2", fTileMode); 421 builder->fsCodeAppend(";\n"); 422 if (!fConvolveAlpha) { 423 builder->fsCodeAppend("\t\t\t\tc.rgb /= c.a;\n"); 424 } 425 builder->fsCodeAppend("\t\t\t\tsum += c * k;\n"); 426 builder->fsCodeAppend("\t\t\t}\n"); 427 builder->fsCodeAppend("\t\t}\n"); 428 if (fConvolveAlpha) { 429 builder->fsCodeAppendf("\t\t%s = sum * %s + %s;\n", outputColor, gain, bias); 430 builder->fsCodeAppendf("\t\t%s.rgb = clamp(%s.rgb, 0.0, %s.a);\n", outputColor, outputColor, outputColor); 431 } else { 432 builder->fsCodeAppend("\t\tvec4 c = "); 433 appendTextureLookup(builder, samplers[0], coords, fTileMode); 434 builder->fsCodeAppend(";\n"); 435 builder->fsCodeAppendf("\t\t%s.a = c.a;\n", outputColor); 436 builder->fsCodeAppendf("\t\t%s.rgb = sum.rgb * %s + %s;\n", outputColor, gain, bias); 437 builder->fsCodeAppendf("\t\t%s.rgb *= %s.a;\n", outputColor, outputColor); 438 } 439} 440 441namespace { 442 443int encodeXY(int x, int y) { 444 SkASSERT(x >= 1 && y >= 1 && x * y <= 32); 445 if (y < x) 446 return 0x40 | encodeXY(y, x); 447 else 448 return (0x40 >> x) | (y - x); 449} 450 451}; 452 453GrGLEffect::EffectKey GrGLMatrixConvolutionEffect::GenKey(const GrEffectStage& s, const GrGLCaps&) { 454 const GrMatrixConvolutionEffect& m = GetEffectFromStage<GrMatrixConvolutionEffect>(s); 455 EffectKey key = encodeXY(m.kernelSize().width(), m.kernelSize().height()); 456 key |= m.tileMode() << 7; 457 key |= m.convolveAlpha() ? 1 << 9 : 0; 458 key <<= GrGLEffectMatrix::kKeyBits; 459 EffectKey matrixKey = GrGLEffectMatrix::GenKey(m.getMatrix(), 460 s.getCoordChangeMatrix(), 461 m.texture(0)); 462 return key | matrixKey; 463} 464 465void GrGLMatrixConvolutionEffect::setData(const GrGLUniformManager& uman, 466 const GrEffectStage& stage) { 467 const GrMatrixConvolutionEffect& effect = GetEffectFromStage<GrMatrixConvolutionEffect>(stage); 468 GrTexture& texture = *effect.texture(0); 469 // the code we generated was for a specific kernel size 470 GrAssert(effect.kernelSize() == fKernelSize); 471 GrAssert(effect.tileMode() == fTileMode); 472 float imageIncrement[2]; 473 float ySign = texture.origin() == kTopLeft_GrSurfaceOrigin ? 1.0f : -1.0f; 474 imageIncrement[0] = 1.0f / texture.width(); 475 imageIncrement[1] = ySign / texture.height(); 476 uman.set2fv(fImageIncrementUni, 0, 1, imageIncrement); 477 uman.set2fv(fTargetUni, 0, 1, effect.target()); 478 uman.set1fv(fKernelUni, 0, fKernelSize.width() * fKernelSize.height(), effect.kernel()); 479 uman.set1f(fGainUni, effect.gain()); 480 uman.set1f(fBiasUni, effect.bias()); 481 fEffectMatrix.setData(uman, 482 effect.getMatrix(), 483 stage.getCoordChangeMatrix(), 484 effect.texture(0)); 485} 486 487GrMatrixConvolutionEffect::GrMatrixConvolutionEffect(GrTexture* texture, 488 const SkISize& kernelSize, 489 const SkScalar* kernel, 490 SkScalar gain, 491 SkScalar bias, 492 const SkIPoint& target, 493 TileMode tileMode, 494 bool convolveAlpha) 495 : INHERITED(texture, MakeDivByTextureWHMatrix(texture)), 496 fKernelSize(kernelSize), 497 fGain(SkScalarToFloat(gain)), 498 fBias(SkScalarToFloat(bias) / 255.0f), 499 fTileMode(tileMode), 500 fConvolveAlpha(convolveAlpha) { 501 fKernel = new float[kernelSize.width() * kernelSize.height()]; 502 for (int i = 0; i < kernelSize.width() * kernelSize.height(); i++) { 503 fKernel[i] = SkScalarToFloat(kernel[i]); 504 } 505 fTarget[0] = static_cast<float>(target.x()); 506 fTarget[1] = static_cast<float>(target.y()); 507} 508 509GrMatrixConvolutionEffect::~GrMatrixConvolutionEffect() { 510 delete[] fKernel; 511} 512 513const GrBackendEffectFactory& GrMatrixConvolutionEffect::getFactory() const { 514 return GrTBackendEffectFactory<GrMatrixConvolutionEffect>::getInstance(); 515} 516 517bool GrMatrixConvolutionEffect::onIsEqual(const GrEffect& sBase) const { 518 const GrMatrixConvolutionEffect& s = CastEffect<GrMatrixConvolutionEffect>(sBase); 519 return this->texture(0) == s.texture(0) && 520 fKernelSize == s.kernelSize() && 521 !memcmp(fKernel, s.kernel(), fKernelSize.width() * fKernelSize.height() * sizeof(float)) && 522 fGain == s.gain() && 523 fBias == s.bias() && 524 fTarget == s.target() && 525 fTileMode == s.tileMode() && 526 fConvolveAlpha == s.convolveAlpha(); 527} 528 529GR_DEFINE_EFFECT_TEST(GrMatrixConvolutionEffect); 530 531// A little bit less than the minimum # uniforms required by DX9SM2 (32). 532// Allows for a 5x5 kernel (or 25x1, for that matter). 533#define MAX_KERNEL_SIZE 25 534 535GrEffectRef* GrMatrixConvolutionEffect::TestCreate(SkMWCRandom* random, 536 GrContext* context, 537 GrTexture* textures[]) { 538 int texIdx = random->nextBool() ? GrEffectUnitTest::kSkiaPMTextureIdx : 539 GrEffectUnitTest::kAlphaTextureIdx; 540 int width = random->nextRangeU(1, MAX_KERNEL_SIZE); 541 int height = random->nextRangeU(1, MAX_KERNEL_SIZE / width); 542 SkISize kernelSize = SkISize::Make(width, height); 543 SkScalar* kernel = new SkScalar[width * height]; 544 for (int i = 0; i < width * height; i++) { 545 kernel[i] = random->nextSScalar1(); 546 } 547 SkScalar gain = random->nextSScalar1(); 548 SkScalar bias = random->nextSScalar1(); 549 SkIPoint target = SkIPoint::Make(random->nextRangeU(0, kernelSize.width()), 550 random->nextRangeU(0, kernelSize.height())); 551 TileMode tileMode = static_cast<TileMode>(random->nextRangeU(0, 2)); 552 bool convolveAlpha = random->nextBool(); 553 return GrMatrixConvolutionEffect::Create(textures[texIdx], 554 kernelSize, 555 kernel, 556 gain, 557 bias, 558 target, 559 tileMode, 560 convolveAlpha); 561 562} 563 564bool SkMatrixConvolutionImageFilter::asNewEffect(GrEffectRef** effect, 565 GrTexture* texture) const { 566 bool ok = fKernelSize.width() * fKernelSize.height() <= MAX_KERNEL_SIZE; 567 if (ok && effect) { 568 *effect = GrMatrixConvolutionEffect::Create(texture, 569 fKernelSize, 570 fKernel, 571 fGain, 572 fBias, 573 fTarget, 574 fTileMode, 575 fConvolveAlpha); 576 } 577 return ok; 578} 579 580/////////////////////////////////////////////////////////////////////////////// 581 582#endif 583