1 /* libs/graphics/sgl/SkRasterizer.cpp 2 ** 3 ** Copyright 2006, The Android Open Source Project 4 ** 5 ** Licensed under the Apache License, Version 2.0 (the "License"); 6 ** you may not use this file except in compliance with the License. 7 ** You may obtain a copy of the License at 8 ** 9 ** http://www.apache.org/licenses/LICENSE-2.0 10 ** 11 ** Unless required by applicable law or agreed to in writing, software 12 ** distributed under the License is distributed on an "AS IS" BASIS, 13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 ** See the License for the specific language governing permissions and 15 ** limitations under the License. 16 */ 17 18 #include "SkRasterizer.h" 19 #include "SkDraw.h" 20 #include "SkMaskFilter.h" 21 #include "SkPath.h" 22 23 // do nothing for now, since we don't store anything at flatten time 24 SkRasterizer::SkRasterizer(SkFlattenableReadBuffer&) {} 25 26 bool SkRasterizer::rasterize(const SkPath& fillPath, const SkMatrix& matrix, 27 const SkIRect* clipBounds, SkMaskFilter* filter, 28 SkMask* mask, SkMask::CreateMode mode) { 29 SkIRect storage; 30 31 if (clipBounds && filter && SkMask::kJustRenderImage_CreateMode != mode) { 32 SkIPoint margin; 33 SkMask srcM, dstM; 34 35 srcM.fFormat = SkMask::kA8_Format; 36 srcM.fBounds.set(0, 0, 1, 1); 37 srcM.fImage = NULL; 38 if (!filter->filterMask(&dstM, srcM, matrix, &margin)) { 39 return false; 40 } 41 storage = *clipBounds; 42 storage.inset(-margin.fX, -margin.fY); 43 clipBounds = &storage; 44 } 45 46 return this->onRasterize(fillPath, matrix, clipBounds, mask, mode); 47 } 48 49 /* Our default implementation of the virtual method just scan converts 50 */ 51 bool SkRasterizer::onRasterize(const SkPath& fillPath, const SkMatrix& matrix, 52 const SkIRect* clipBounds, 53 SkMask* mask, SkMask::CreateMode mode) { 54 SkPath devPath; 55 56 fillPath.transform(matrix, &devPath); 57 return SkDraw::DrawToMask(devPath, clipBounds, NULL, NULL, mask, mode); 58 } 59 60