SkRectShaderImageFilter.h revision a1c511b8704c6c266b90860a4c68f30ca7514f9b 
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 SkRectShaderImageFilter_DEFINED
9#define SkRectShaderImageFilter_DEFINED
10
11#include "SkImageFilter.h"
12#include "SkRect.h"
13
14class SkShader;
15
16class SK_API SkRectShaderImageFilter : public SkImageFilter {
17public:
18    /**
19     *  The SkShader object will have its refcnt increased as it becomes a member of the
20     *  SkRectShaderImageFilter object returned by this function. It cannot be NULL.
21     *  The region parameter is used to specify on which region the shader is applied.
22     */
23    static SkRectShaderImageFilter* Create(SkShader* s, SkRect region);
24    virtual ~SkRectShaderImageFilter();
25
26    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkRectShaderImageFilter)
27
28protected:
29    SkRectShaderImageFilter(SkFlattenableReadBuffer& buffer);
30    virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
31
32    virtual bool onFilterImage(Proxy*, const SkBitmap& src, const SkMatrix&,
33                               SkBitmap* result, SkIPoint* loc) SK_OVERRIDE;
34
35private:
36    SkRectShaderImageFilter(SkShader* s, SkRect region);
37    SkShader*  fShader;
38    SkRect     fRegion;
39
40    typedef SkImageFilter INHERITED;
41};
42
43#endif
44