SkRasterizer.cpp revision ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976e 
1
2/*
3 * Copyright 2006 The Android Open Source Project
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8
9
10#include "SkRasterizer.h"
11#include "SkDraw.h"
12#include "SkMaskFilter.h"
13#include "SkPath.h"
14
15// do nothing for now, since we don't store anything at flatten time
16SkRasterizer::SkRasterizer(SkFlattenableReadBuffer&) {}
17
18bool SkRasterizer::rasterize(const SkPath& fillPath, const SkMatrix& matrix,
19                             const SkIRect* clipBounds, SkMaskFilter* filter,
20                             SkMask* mask, SkMask::CreateMode mode) {
21    SkIRect storage;
22
23    if (clipBounds && filter && SkMask::kJustRenderImage_CreateMode != mode) {
24        SkIPoint    margin;
25        SkMask      srcM, dstM;
26
27        srcM.fFormat = SkMask::kA8_Format;
28        srcM.fBounds.set(0, 0, 1, 1);
29        srcM.fImage = NULL;
30        if (!filter->filterMask(&dstM, srcM, matrix, &margin)) {
31            return false;
32        }
33        storage = *clipBounds;
34        storage.inset(-margin.fX, -margin.fY);
35        clipBounds = &storage;
36    }
37
38    return this->onRasterize(fillPath, matrix, clipBounds, mask, mode);
39}
40
41/*  Our default implementation of the virtual method just scan converts
42*/
43bool SkRasterizer::onRasterize(const SkPath& fillPath, const SkMatrix& matrix,
44                             const SkIRect* clipBounds,
45                             SkMask* mask, SkMask::CreateMode mode) {
46    SkPath  devPath;
47
48    fillPath.transform(matrix, &devPath);
49    return SkDraw::DrawToMask(devPath, clipBounds, NULL, NULL, mask, mode);
50}
51
52