SkMatrixConvolutionImageFilter.cpp revision 8640d5024d57da5508bdf7585849e3b1f1cb365b
15faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org/* 25faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org * Copyright 2012 The Android Open Source Project 35faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org * 45faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org * Use of this source code is governed by a BSD-style license that can be 55faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org * found in the LICENSE file. 65faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org */ 75faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org 85faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org#include "SkMatrixConvolutionImageFilter.h" 95faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org#include "SkBitmap.h" 105faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org#include "SkColorPriv.h" 115faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org#include "SkFlattenableBuffers.h" 125faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org#include "SkRect.h" 138640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org#include "SkUnPreMultiply.h" 145faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org 158640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.orgSkMatrixConvolutionImageFilter::SkMatrixConvolutionImageFilter(const SkISize& kernelSize, const SkScalar* kernel, SkScalar gain, SkScalar bias, const SkIPoint& target, TileMode tileMode, bool convolveAlpha, SkImageFilter* input) 165faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org : INHERITED(input), 175faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org fKernelSize(kernelSize), 185faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org fGain(gain), 195faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org fBias(bias), 205faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org fTarget(target), 218640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org fTileMode(tileMode), 228640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org fConvolveAlpha(convolveAlpha) { 235faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org uint32_t size = fKernelSize.fWidth * fKernelSize.fHeight; 245faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org fKernel = SkNEW_ARRAY(SkScalar, size); 255faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org memcpy(fKernel, kernel, size * sizeof(SkScalar)); 265faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org SkASSERT(target.fX >= 0 && target.fX < kernelSize.fWidth); 275faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org SkASSERT(target.fY >= 0 && target.fY < kernelSize.fHeight); 285faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org} 295faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org 305faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.orgSkMatrixConvolutionImageFilter::SkMatrixConvolutionImageFilter(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) { 315faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org fKernelSize.fWidth = buffer.readInt(); 325faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org fKernelSize.fHeight = buffer.readInt(); 335faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org uint32_t size = fKernelSize.fWidth * fKernelSize.fHeight; 345faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org fKernel = SkNEW_ARRAY(SkScalar, size); 355faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org uint32_t readSize = buffer.readScalarArray(fKernel); 365faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org SkASSERT(readSize == size); 375faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org fGain = buffer.readScalar(); 385faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org fBias = buffer.readScalar(); 395faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org fTarget.fX = buffer.readScalar(); 405faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org fTarget.fY = buffer.readScalar(); 415faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org fTileMode = (TileMode) buffer.readInt(); 428640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org fConvolveAlpha = buffer.readBool(); 435faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org} 445faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org 455faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.orgvoid SkMatrixConvolutionImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const { 465faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org this->INHERITED::flatten(buffer); 475faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org buffer.writeInt(fKernelSize.fWidth); 485faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org buffer.writeInt(fKernelSize.fHeight); 495faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org buffer.writeScalarArray(fKernel, fKernelSize.fWidth * fKernelSize.fHeight); 505faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org buffer.writeScalar(fGain); 515faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org buffer.writeScalar(fBias); 525faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org buffer.writeScalar(fTarget.fX); 535faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org buffer.writeScalar(fTarget.fY); 545faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org buffer.writeInt((int) fTileMode); 558640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org buffer.writeBool(fConvolveAlpha); 565faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org} 575faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org 585faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.orgSkMatrixConvolutionImageFilter::~SkMatrixConvolutionImageFilter() { 595faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org delete[] fKernel; 605faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org} 615faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org 625faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.orgclass UncheckedPixelFetcher { 635faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.orgpublic: 645faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org static inline SkPMColor fetch(const SkBitmap& src, int x, int y) { 655faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org return *src.getAddr32(x, y); 665faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org } 675faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org}; 685faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org 695faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.orgclass ClampPixelFetcher { 705faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.orgpublic: 715faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org static inline SkPMColor fetch(const SkBitmap& src, int x, int y) { 725faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org x = SkClampMax(x, src.width() - 1); 735faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org y = SkClampMax(y, src.height() - 1); 745faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org return *src.getAddr32(x, y); 755faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org } 765faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org}; 775faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org 785faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.orgclass RepeatPixelFetcher { 795faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.orgpublic: 805faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org static inline SkPMColor fetch(const SkBitmap& src, int x, int y) { 815faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org x %= src.width(); 825faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org y %= src.height(); 835faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org if (x < 0) { 845faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org x += src.width(); 855faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org } 865faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org if (y < 0) { 875faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org y += src.height(); 885faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org } 895faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org return *src.getAddr32(x, y); 905faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org } 915faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org}; 925faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org 935faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.orgclass ClampToBlackPixelFetcher { 945faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.orgpublic: 955faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org static inline SkPMColor fetch(const SkBitmap& src, int x, int y) { 965faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org if (x < 0 || x >= src.width() || y < 0 || y >= src.height()) { 975faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org return 0; 985faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org } else { 995faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org return *src.getAddr32(x, y); 1005faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org } 1015faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org } 1025faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org}; 1035faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org 1048640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.orgtemplate<class PixelFetcher, bool convolveAlpha> 1055faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.orgvoid SkMatrixConvolutionImageFilter::filterPixels(const SkBitmap& src, SkBitmap* result, const SkIRect& rect) { 1065faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org for (int y = rect.fTop; y < rect.fBottom; ++y) { 1075faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org SkPMColor* dptr = result->getAddr32(rect.fLeft, y); 1085faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org for (int x = rect.fLeft; x < rect.fRight; ++x) { 1095faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org SkScalar sumA = 0, sumR = 0, sumG = 0, sumB = 0; 1105faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org for (int cy = 0; cy < fKernelSize.fHeight; cy++) { 1115faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org for (int cx = 0; cx < fKernelSize.fWidth; cx++) { 1125faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org SkPMColor s = PixelFetcher::fetch(src, x + cx - fTarget.fX, y + cy - fTarget.fY); 1135faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org SkScalar k = fKernel[cy * fKernelSize.fWidth + cx]; 1148640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org if (convolveAlpha) { 1158640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org sumA += SkScalarMul(SkIntToScalar(SkGetPackedA32(s)), k); 1168640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org } 1175faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org sumR += SkScalarMul(SkIntToScalar(SkGetPackedR32(s)), k); 1185faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org sumG += SkScalarMul(SkIntToScalar(SkGetPackedG32(s)), k); 1195faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org sumB += SkScalarMul(SkIntToScalar(SkGetPackedB32(s)), k); 1205faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org } 1215faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org } 1228640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org int a = convolveAlpha 1238640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org ? SkClampMax(SkScalarFloorToInt(SkScalarMul(sumA, fGain) + fBias), 255) 1248640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org : SkGetPackedA32(PixelFetcher::fetch(src, x, y)); 125cc9471c36d3967270f7eb26f8b53ce0f17bc9fbbsenorblanco@chromium.org int r = SkClampMax(SkScalarFloorToInt(SkScalarMul(sumR, fGain) + fBias), a); 126cc9471c36d3967270f7eb26f8b53ce0f17bc9fbbsenorblanco@chromium.org int g = SkClampMax(SkScalarFloorToInt(SkScalarMul(sumG, fGain) + fBias), a); 127cc9471c36d3967270f7eb26f8b53ce0f17bc9fbbsenorblanco@chromium.org int b = SkClampMax(SkScalarFloorToInt(SkScalarMul(sumB, fGain) + fBias), a); 1288640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org if (!convolveAlpha) { 1298640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org *dptr++ = SkPreMultiplyARGB(a, r, g, b); 1308640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org } else { 1318640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org *dptr++ = SkPackARGB32(a, r, g, b); 1328640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org } 1335faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org } 1345faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org } 1355faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org} 1365faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org 1378640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.orgtemplate<class PixelFetcher> 1388640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.orgvoid SkMatrixConvolutionImageFilter::filterPixels(const SkBitmap& src, SkBitmap* result, const SkIRect& rect) { 1398640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org if (fConvolveAlpha) { 1408640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org filterPixels<PixelFetcher, true>(src, result, rect); 1418640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org } else { 1428640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org filterPixels<PixelFetcher, false>(src, result, rect); 1438640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org } 1448640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org} 1458640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org 1465faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.orgvoid SkMatrixConvolutionImageFilter::filterInteriorPixels(const SkBitmap& src, SkBitmap* result, const SkIRect& rect) { 1475faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org filterPixels<UncheckedPixelFetcher>(src, result, rect); 1485faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org} 1495faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org 1505faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.orgvoid SkMatrixConvolutionImageFilter::filterBorderPixels(const SkBitmap& src, SkBitmap* result, const SkIRect& rect) { 1515faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org switch (fTileMode) { 1525faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org case kClamp_TileMode: 1535faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org filterPixels<ClampPixelFetcher>(src, result, rect); 1545faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org break; 1555faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org case kRepeat_TileMode: 1565faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org filterPixels<RepeatPixelFetcher>(src, result, rect); 1575faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org break; 1585faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org case kClampToBlack_TileMode: 1595faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org filterPixels<ClampToBlackPixelFetcher>(src, result, rect); 1605faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org break; 1615faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org } 1625faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org} 1635faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org 1648640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org// FIXME: This should be refactored to SkSingleInputImageFilter for 1658640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org// use by other filters. For now, we assume the input is always 1668640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org// premultiplied and unpremultiply it 1678640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.orgstatic SkBitmap unpremultiplyBitmap(const SkBitmap& src) 1688640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org{ 1698640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org SkAutoLockPixels alp(src); 1708640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org if (!src.getPixels()) { 1718640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org return SkBitmap(); 1728640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org } 1738640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org SkBitmap result; 1748640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org result.setConfig(src.config(), src.width(), src.height()); 1758640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org result.allocPixels(); 1768640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org if (!result.getPixels()) { 1778640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org return SkBitmap(); 1788640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org } 1798640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org for (int y = 0; y < src.height(); ++y) { 1808640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org const uint32_t* srcRow = src.getAddr32(0, y); 1818640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org uint32_t* dstRow = result.getAddr32(0, y); 1828640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org for (int x = 0; x < src.width(); ++x) { 1838640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org dstRow[x] = SkUnPreMultiply::PMColorToColor(srcRow[x]); 1848640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org } 1858640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org } 1868640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org return result; 1878640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org} 1888640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org 1895faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.orgbool SkMatrixConvolutionImageFilter::onFilterImage(Proxy* proxy, 1905faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org const SkBitmap& source, 1915faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org const SkMatrix& matrix, 1925faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org SkBitmap* result, 1935faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org SkIPoint* loc) { 1945faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org SkBitmap src = this->getInputResult(proxy, source, matrix, loc); 1955faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org if (src.config() != SkBitmap::kARGB_8888_Config) { 1965faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org return false; 1975faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org } 1985faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org 1998640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org if (!fConvolveAlpha && !src.isOpaque()) { 2008640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org src = unpremultiplyBitmap(src); 2018640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org } 2028640d5024d57da5508bdf7585849e3b1f1cb365bsenorblanco@chromium.org 2035faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org SkAutoLockPixels alp(src); 2045faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org if (!src.getPixels()) { 2055faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org return false; 2065faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org } 2075faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org 2085faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org result->setConfig(src.config(), src.width(), src.height()); 2095faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org result->allocPixels(); 2105faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org 2115faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org SkIRect interior = SkIRect::MakeXYWH(fTarget.fX, fTarget.fY, 2125faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org src.width() - fKernelSize.fWidth + 1, 2135faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org src.height() - fKernelSize.fHeight + 1); 2145faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org SkIRect top = SkIRect::MakeWH(src.width(), fTarget.fY); 2155faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org SkIRect bottom = SkIRect::MakeLTRB(0, interior.bottom(), 2165faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org src.width(), src.height()); 2175faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org SkIRect left = SkIRect::MakeXYWH(0, interior.top(), 2185faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org fTarget.fX, interior.height()); 2195faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org SkIRect right = SkIRect::MakeLTRB(interior.right(), interior.top(), 2205faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org src.width(), interior.bottom()); 2215faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org filterBorderPixels(src, result, top); 2225faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org filterBorderPixels(src, result, left); 2235faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org filterInteriorPixels(src, result, interior); 2245faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org filterBorderPixels(src, result, right); 2255faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org filterBorderPixels(src, result, bottom); 2265faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org return true; 2275faa2dc266ec933b3961f985e5718236f1ecbe47senorblanco@chromium.org} 228