1 /* 2 * Copyright 2012 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 "SkStippleMaskFilter.h" 9 #include "SkString.h" 10 11 bool SkStippleMaskFilter::filterMask(SkMask* dst, 12 const SkMask& src, 13 const SkMatrix& matrix, 14 SkIPoint* margin) const { 15 16 if (src.fFormat != SkMask::kA8_Format) { 17 return false; 18 } 19 20 dst->fBounds = src.fBounds; 21 dst->fRowBytes = dst->fBounds.width(); 22 dst->fFormat = SkMask::kA8_Format; 23 dst->fImage = NULL; 24 25 if (NULL != src.fImage) { 26 size_t dstSize = dst->computeImageSize(); 27 if (0 == dstSize) { 28 return false; // too big to allocate, abort 29 } 30 31 dst->fImage = SkMask::AllocImage(dstSize); 32 33 uint8_t* srcScanLine = src.fImage; 34 uint8_t* scanline = dst->fImage; 35 36 for (int y = 0; y < src.fBounds.height(); ++y) { 37 for (int x = 0; x < src.fBounds.width(); ++x) { 38 scanline[x] = srcScanLine[x] && ((x+y) & 0x1) ? 0xFF : 0x00; 39 } 40 scanline += dst->fRowBytes; 41 srcScanLine += src.fRowBytes; 42 } 43 } 44 45 return true; 46 } 47 48 #ifndef SK_IGNORE_TO_STRING 49 void SkStippleMaskFilter::toString(SkString* str) const { 50 str->append("SkStippleMaskFilter: ()"); 51 } 52 #endif 53
