1 /*
2  * Copyright 2006 The Android Open Source Project
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 SkEmbossMaskFilter_DEFINED
9 #define SkEmbossMaskFilter_DEFINED
10 
11 #include "SkMaskFilterBase.h"
12 
13 /** \class SkEmbossMaskFilter
14 
15     This mask filter creates a 3D emboss look, by specifying a light and blur amount.
16 */
17 class SK_API SkEmbossMaskFilter : public SkMaskFilterBase {
18 public:
19     struct Light {
20         SkScalar    fDirection[3];  // x,y,z
21         uint16_t    fPad;
22         uint8_t     fAmbient;
23         uint8_t     fSpecular;      // exponent, 4.4 right now
24     };
25 
26     static sk_sp<SkMaskFilter> Make(SkScalar blurSigma, const Light& light);
27 
28     // overrides from SkMaskFilter
29     //  This method is not exported to java.
30     SkMask::Format getFormat() const override;
31     //  This method is not exported to java.
32     bool filterMask(SkMask* dst, const SkMask& src, const SkMatrix&,
33                     SkIPoint* margin) const override;
34 
35 protected:
36     SkEmbossMaskFilter(SkScalar blurSigma, const Light& light);
37     void flatten(SkWriteBuffer&) const override;
38 
39 private:
40     SK_FLATTENABLE_HOOKS(SkEmbossMaskFilter)
41 
42     Light       fLight;
43     SkScalar    fBlurSigma;
44 
45     typedef SkMaskFilter INHERITED;
46 };
47 
48 #endif
49