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1 /* | |
2 * Copyright (C) 2013 Google Inc. All rights reserved. | |
3 * | |
4 * Redistribution and use in source and binary forms, with or without | |
5 * modification, are permitted provided that the following conditions are | |
6 * met: | |
7 * | |
8 * * Redistributions of source code must retain the above copyright | |
9 * notice, this list of conditions and the following disclaimer. | |
10 * * Redistributions in binary form must reproduce the above | |
11 * copyright notice, this list of conditions and the following disclaimer | |
12 * in the documentation and/or other materials provided with the | |
13 * distribution. | |
14 * * Neither the name of Google Inc. nor the names of its | |
15 * contributors may be used to endorse or promote products derived from | |
16 * this software without specific prior written permission. | |
17 * | |
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
29 */ | |
30 | |
31 #ifndef DrawLooper_h | |
32 #define DrawLooper_h | |
33 | |
34 #include "wtf/Noncopyable.h" | |
35 #include "wtf/RefPtr.h" | |
36 | |
37 class SkDrawLooper; | |
38 class SkLayerDrawLooper; | |
39 | |
40 namespace WebCore { | |
41 | |
42 class Color; | |
43 class FloatSize; | |
44 | |
45 class DrawLooper { | |
46 // Implementing the copy constructor properly would require writing code to | |
47 // copy the underlying SkDrawLooper. | |
48 WTF_MAKE_NONCOPYABLE(DrawLooper); | |
49 | |
50 public: | |
51 enum ShadowTransformMode { | |
52 ShadowRespectsTransforms, | |
53 ShadowIgnoresTransforms | |
54 }; | |
55 enum ShadowAlphaMode { | |
56 ShadowRespectsAlpha, | |
57 ShadowIgnoresAlpha | |
58 }; | |
59 | |
60 DrawLooper(); | |
61 ~DrawLooper(); | |
62 | |
63 // Callees should not modify this looper other than to iterate over it. | |
64 // A downcast to SkLayerDrawLooper* is tantamount to a const_cast. | |
65 SkDrawLooper* skDrawLooper() const; | |
66 | |
67 void addUnmodifiedContent(); | |
68 void addShadow(const FloatSize& offset, float blur, const Color&, | |
69 ShadowTransformMode = ShadowRespectsTransforms, | |
70 ShadowAlphaMode = ShadowRespectsAlpha); | |
71 | |
72 private: | |
73 RefPtr<SkLayerDrawLooper> m_skDrawLooper; | |
74 }; | |
75 | |
76 } // namespace WebCore | |
77 | |
78 #endif // DrawLooper_h | |
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