1/*
2 * Copyright 2013 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 "SkBitmap.h"
9#include "SkComposeImageFilter.h"
10#include "SkReadBuffer.h"
11#include "SkWriteBuffer.h"
12
13SkComposeImageFilter::~SkComposeImageFilter() {
14}
15
16bool SkComposeImageFilter::onFilterImage(Proxy* proxy,
17                                         const SkBitmap& src,
18                                         const Context& ctx,
19                                         SkBitmap* result,
20                                         SkIPoint* offset) const {
21    SkImageFilter* outer = getInput(0);
22    SkImageFilter* inner = getInput(1);
23
24    if (!outer && !inner) {
25        return false;
26    }
27
28    if (!outer || !inner) {
29        return (outer ? outer : inner)->filterImage(proxy, src, ctx, result, offset);
30    }
31
32    SkBitmap tmp;
33    return inner->filterImage(proxy, src, ctx, &tmp, offset) &&
34           outer->filterImage(proxy, tmp, ctx, result, offset);
35}
36
37bool SkComposeImageFilter::onFilterBounds(const SkIRect& src,
38                                          const SkMatrix& ctm,
39                                          SkIRect* dst) const {
40    SkImageFilter* outer = getInput(0);
41    SkImageFilter* inner = getInput(1);
42
43    if (!outer && !inner) {
44        return false;
45    }
46
47    if (!outer || !inner) {
48        return (outer ? outer : inner)->filterBounds(src, ctm, dst);
49    }
50
51    SkIRect tmp;
52    return inner->filterBounds(src, ctm, &tmp) &&
53           outer->filterBounds(tmp, ctm, dst);
54}
55
56SkComposeImageFilter::SkComposeImageFilter(SkReadBuffer& buffer)
57  : INHERITED(2, buffer) {
58}
59