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1 // Copyright 2015 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef NinePieceImageGrid_h | |
6 #define NinePieceImageGrid_h | |
7 | |
8 #include "platform/geometry/FloatRect.h" | |
9 #include "platform/graphics/Image.h" | |
10 #include "platform/heap/Heap.h" | |
11 | |
12 namespace blink { | |
13 | |
14 class BorderImageLength; | |
15 class ComputedStyle; | |
16 class FloatSize; | |
17 class IntRect; | |
18 class IntRectOutsets; | |
19 class IntSize; | |
fs
2015/06/24 13:19:10
FloatSize, IntRect and IntSize are used in class d
davve
2015/06/24 13:35:26
Done.
Removed some unused ones as well.
| |
20 class NinePieceImage; | |
21 | |
22 enum NinePiece { | |
23 MinPiece = 0, | |
24 TopLeftPiece = MinPiece, | |
25 BottomLeftPiece, | |
26 LeftPiece, | |
27 TopRightPiece, | |
28 BottomRightPiece, | |
29 RightPiece, | |
30 TopPiece, | |
31 BottomPiece, | |
32 MiddlePiece, | |
33 MaxPiece | |
34 }; | |
35 | |
36 inline NinePiece& operator++(NinePiece& piece) | |
37 { | |
38 piece = static_cast<NinePiece>(static_cast<int>(piece) + 1); | |
39 return piece; | |
40 } | |
41 | |
42 // The NinePieceImageGrid class is responsible for computing drawing information for the nine piece image. | |
43 // | |
44 // http://dev.w3.org/csswg/css-backgrounds-3/#border-image-process | |
45 // | |
46 // Given an image, a set of slices and a border area: | |
47 // | |
48 // | | | |
49 // +---+---------+---+ +------------------+ | |
50 // | 1 | 7 | 4 | | border | | |
51 // --+---+---------+---+--- | +------------+ | | |
52 // | | | | | | | | | |
53 // | 3 | 9 | 6 | | | css | | | |
54 // | | image | | | | box | | | |
55 // | | | | | | | | | |
56 // --+---+---------+---+--- | | | | | |
57 // | 2 | 8 | 5 | | +------------+ | | |
58 // +---+---------+---+ | | | |
59 // | | +------------------+ | |
60 // | |
61 // it generates drawing information for the nine border pieces. | |
62 class NinePieceImageGrid { | |
63 STACK_ALLOCATED(); | |
64 | |
65 public: | |
66 NinePieceImageGrid(const NinePieceImage&, IntSize imageSize, IntRect borderI mageArea, | |
67 const IntRectOutsets& borderWidths); | |
68 | |
69 struct NinePieceDrawInfo { | |
70 bool isDrawable; | |
71 bool isCornerPiece; | |
72 FloatRect destination; | |
73 FloatRect source; | |
74 | |
75 // tileScale and tileRule are only useful for non-corners, i.e. edge and center pieces. | |
76 FloatSize tileScale; | |
77 struct { | |
78 Image::TileRule horizontal; | |
79 Image::TileRule vertical; | |
80 } tileRule; | |
81 }; | |
82 NinePieceDrawInfo getNinePieceDrawInfo(NinePiece) const; | |
83 | |
84 struct Edge { | |
85 bool draw() const { return slice > 0 && width > 0; } | |
fs
2015/06/24 13:19:10
isDrawable? (or any for of query sounding name)
davve
2015/06/24 13:35:25
Yep, that's better.
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86 float scale() const { return draw() ? (float)width / slice : 1; } | |
87 int slice; | |
88 int width; | |
89 }; | |
90 | |
91 private: | |
92 void setDrawInfoCorner(NinePieceDrawInfo&, NinePiece) const; | |
93 void setDrawInfoEdge(NinePieceDrawInfo&, NinePiece) const; | |
94 void setDrawInfoMiddle(NinePieceDrawInfo&) const; | |
95 | |
96 IntRect m_borderImageArea; | |
97 IntSize m_imageSize; | |
98 Image::TileRule m_horizontalTileRule; | |
99 Image::TileRule m_verticalTileRule; | |
100 bool m_fill; | |
101 | |
102 Edge m_top; | |
103 Edge m_right; | |
104 Edge m_bottom; | |
105 Edge m_left; | |
106 }; | |
107 | |
108 } // namespace blink | |
109 | |
110 #endif // NinePieceImageGrid_h | |
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