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1 /* | 1 /* |
2 * Copyright 2016 Google Inc. | 2 * Copyright 2016 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #ifndef GrReducedClip_DEFINED | 8 #ifndef GrReducedClip_DEFINED |
9 #define GrReducedClip_DEFINED | 9 #define GrReducedClip_DEFINED |
10 | 10 |
11 #include "SkClipStack.h" | 11 #include "SkClipStack.h" |
12 #include "SkTLList.h" | 12 #include "SkTLList.h" |
13 | 13 |
14 /** | 14 /** |
15 * This class takes a clip stack and produces a reduced set of elements that are
equivalent to | 15 * This class takes a clip stack and produces a reduced set of elements that are
equivalent to |
16 * applying that full stack within a specified query rectangle. | 16 * applying that full stack within a specified query rectangle. |
17 */ | 17 */ |
18 class SK_API GrReducedClip { | 18 class SK_API GrReducedClip { |
19 public: | 19 public: |
20 GrReducedClip(const SkClipStack& stack, const SkRect& queryBounds); | 20 GrReducedClip(const SkClipStack& stack, const SkRect& queryBounds); |
21 | 21 |
22 /** | 22 /** |
23 * Uniquely identifies this reduced clip. | |
24 */ | |
25 int32_t genID() const { return fGenID; } | |
26 | |
27 /** | |
28 * If hasIBounds() is true, this is the bounding box within which the reduce
d clip is valid, and | 23 * If hasIBounds() is true, this is the bounding box within which the reduce
d clip is valid, and |
29 * the caller must not modify any pixels outside this box. Undefined if hasI
Bounds() is false. | 24 * the caller must not modify any pixels outside this box. Undefined if hasI
Bounds() is false. |
30 */ | 25 */ |
31 const SkIRect& ibounds() const { SkASSERT(fHasIBounds); return fIBounds; } | 26 const SkIRect& ibounds() const { SkASSERT(fHasIBounds); return fIBounds; } |
32 int left() const { return this->ibounds().left(); } | 27 int left() const { return this->ibounds().left(); } |
33 int top() const { return this->ibounds().top(); } | 28 int top() const { return this->ibounds().top(); } |
34 int width() const { return this->ibounds().width(); } | 29 int width() const { return this->ibounds().width(); } |
35 int height() const { return this->ibounds().height(); } | 30 int height() const { return this->ibounds().height(); } |
36 | 31 |
37 /** | 32 /** |
38 * Indicates whether ibounds() are defined. They will always be defined if t
he elements() are | 33 * Indicates whether ibounds() are defined. They will always be defined if t
he elements() are |
39 * nonempty. | 34 * nonempty. |
40 */ | 35 */ |
41 bool hasIBounds() const { return fHasIBounds; } | 36 bool hasIBounds() const { return fHasIBounds; } |
42 | 37 |
43 typedef SkTLList<SkClipStack::Element, 16> ElementList; | 38 typedef SkTLList<SkClipStack::Element, 16> ElementList; |
44 | 39 |
45 /** | 40 /** |
46 * Populated with a minimal list of elements that implement the clip. | 41 * Populated with a minimal list of elements that implement the clip. |
47 */ | 42 */ |
48 const ElementList& elements() const { return fElements; } | 43 const ElementList& elements() const { return fElements; } |
49 | 44 |
50 /** | 45 /** |
| 46 * If elements() are nonempty, uniquely identifies the list of elements with
in ibounds(). |
| 47 * Otherwise undefined. |
| 48 */ |
| 49 int32_t elementsGenID() const { SkASSERT(!fElements.isEmpty()); return fElem
entsGenID; } |
| 50 |
| 51 /** |
51 * Indicates whether antialiasing is required to process any of the clip ele
ments. | 52 * Indicates whether antialiasing is required to process any of the clip ele
ments. |
52 */ | 53 */ |
53 bool requiresAA() const { return fRequiresAA; } | 54 bool requiresAA() const { return fRequiresAA; } |
54 | 55 |
55 enum class InitialState : bool { | 56 enum class InitialState : bool { |
56 kAllIn, | 57 kAllIn, |
57 kAllOut | 58 kAllOut |
58 }; | 59 }; |
59 | 60 |
60 InitialState initialState() const { return fInitialState; } | 61 InitialState initialState() const { return fInitialState; } |
61 | 62 |
62 private: | 63 private: |
63 int32_t fGenID; | |
64 SkIRect fIBounds; | 64 SkIRect fIBounds; |
65 bool fHasIBounds; | 65 bool fHasIBounds; |
66 ElementList fElements; | 66 ElementList fElements; |
| 67 int32_t fElementsGenID; |
67 bool fRequiresAA; | 68 bool fRequiresAA; |
68 InitialState fInitialState; | 69 InitialState fInitialState; |
69 }; | 70 }; |
70 | 71 |
71 #endif | 72 #endif |
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