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#ifndef SkComposeImageFilter_DEFINED
9#define SkComposeImageFilter_DEFINED
10
11#include "SkImageFilter.h"
12
13class SK_API SkComposeImageFilter : public SkImageFilter {
14public:
15    virtual ~SkComposeImageFilter();
16
17    static SkImageFilter* Create(SkImageFilter* outer, SkImageFilter* inner) {
18        if (NULL == outer) {
19            return SkSafeRef(inner);
20        }
21        if (NULL == inner) {
22            return SkRef(outer);
23        }
24        SkImageFilter* inputs[2] = { outer, inner };
25        return SkNEW_ARGS(SkComposeImageFilter, (inputs));
26    }
27    void computeFastBounds(const SkRect& src, SkRect* dst) const override;
28
29    SK_TO_STRING_OVERRIDE()
30    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkComposeImageFilter)
31
32protected:
33    explicit SkComposeImageFilter(SkImageFilter* inputs[2]) : INHERITED(2, inputs) {
34        SkASSERT(inputs[0]);
35        SkASSERT(inputs[1]);
36    }
37    virtual bool onFilterImage(Proxy*, const SkBitmap& src, const Context&,
38                               SkBitmap* result, SkIPoint* loc) const override;
39    bool onFilterBounds(const SkIRect&, const SkMatrix&, SkIRect*) const override;
40
41private:
42    typedef SkImageFilter INHERITED;
43};
44
45#endif
46