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
SkRasterizer(SkFlattenableReadBuffer &)24 SkRasterizer::SkRasterizer(SkFlattenableReadBuffer&) {}
25
rasterize(const SkPath & fillPath,const SkMatrix & matrix,const SkIRect * clipBounds,SkMaskFilter * filter,SkMask * mask,SkMask::CreateMode mode)26 bool 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 */
onRasterize(const SkPath & fillPath,const SkMatrix & matrix,const SkIRect * clipBounds,SkMask * mask,SkMask::CreateMode mode)53 bool 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