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 24SkRasterizer::SkRasterizer(SkFlattenableReadBuffer&) {} 25 26bool SkRasterizer::rasterize(const SkPath& fillPath, const SkMatrix& matrix, 27 const SkIRect* clipBounds, SkMaskFilter* filter, 28 SkMask* mask, SkMask::CreateMode mode) 29{ 30 SkIRect storage; 31 32 if (clipBounds && filter && SkMask::kJustRenderImage_CreateMode != mode) 33 { 34 SkIPoint margin; 35 SkMask srcM, dstM; 36 37 srcM.fFormat = SkMask::kA8_Format; 38 srcM.fBounds.set(0, 0, 1, 1); 39 srcM.fImage = NULL; 40 if (!filter->filterMask(&dstM, srcM, matrix, &margin)) 41 return false; 42 43 storage = *clipBounds; 44 storage.inset(-margin.fX, -margin.fY); 45 clipBounds = &storage; 46 } 47 48 return this->onRasterize(fillPath, matrix, clipBounds, mask, mode); 49} 50 51/* Our default implementation of the virtual method just scan converts 52*/ 53bool SkRasterizer::onRasterize(const SkPath& fillPath, const SkMatrix& matrix, 54 const SkIRect* clipBounds, 55 SkMask* mask, SkMask::CreateMode mode) 56{ 57 SkPath devPath; 58 59 fillPath.transform(matrix, &devPath); 60 return SkDraw::DrawToMask(devPath, clipBounds, NULL, NULL, mask, mode); 61} 62 63