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1 /* | 1 /* |
2 * Copyright 2012 Google Inc. | 2 * Copyright 2012 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 class SK_API GrReducedClip { | 14 class SK_API GrReducedClip { |
15 public: | 15 public: |
16 typedef SkTLList<SkClipStack::Element> ElementList; | 16 typedef SkTLList<SkClipStack::Element> ElementList; |
17 | 17 |
18 enum InitialState { | 18 enum InitialState { |
19 kAllIn_InitialState, | 19 kAllIn_InitialState, |
20 kAllOut_InitialState, | 20 kAllOut_InitialState, |
21 }; | 21 }; |
22 | 22 |
23 /** | 23 /** |
24 * This function takes a clip stack and a query rectangle and it produces a | 24 * This function takes a clip stack and a query rectangle and it produces a |
25 * reduced set of SkClipStack::Elements that are equivalent to applying the | 25 * reduced set of SkClipStack::Elements that are equivalent to applying the |
26 * full stack to the rectangle. The clip stack generation id that represents | 26 * full stack to the rectangle. The clip stack generation id that represents |
27 * the list of elements is returned in resultGenID. The initial state of the | 27 * the list of elements is returned in resultGenID. The initial state of the |
28 * query rectangle before the first clip element is applied is returned via | 28 * query rectangle before the first clip element is applied is returned via |
29 * initialState. Optionally, the caller can request a tighter bounds on the | 29 * initialState. Optionally, the caller can request a tighter bounds on the |
30 * clip be returned via tighterBounds. If not NULL, tighterBounds will | 30 * clip be returned via tighterBounds. If not nullptr, tighterBounds will |
31 * always be contained by queryBounds after return. If tighterBounds is | 31 * always be contained by queryBounds after return. If tighterBounds is |
32 * specified then it is assumed that the caller will implicitly clip against | 32 * specified then it is assumed that the caller will implicitly clip against |
33 * it. If the caller specifies non-NULL for requiresAA then it will indicate | 33 * it. If the caller specifies non-nullptr for requiresAA then it will indic
ate |
34 * whether anti-aliasing is required to process any of the elements in the | 34 * whether anti-aliasing is required to process any of the elements in the |
35 * result. | 35 * result. |
36 * | 36 * |
37 * This may become a member function of SkClipStack when its interface is | 37 * This may become a member function of SkClipStack when its interface is |
38 * determined to be stable. | 38 * determined to be stable. |
39 */ | 39 */ |
40 static void ReduceClipStack(const SkClipStack& stack, | 40 static void ReduceClipStack(const SkClipStack& stack, |
41 const SkIRect& queryBounds, | 41 const SkIRect& queryBounds, |
42 ElementList* result, | 42 ElementList* result, |
43 int32_t* resultGenID, | 43 int32_t* resultGenID, |
44 InitialState* initialState, | 44 InitialState* initialState, |
45 SkIRect* tighterBounds = NULL, | 45 SkIRect* tighterBounds = nullptr, |
46 bool* requiresAA = NULL); | 46 bool* requiresAA = nullptr); |
47 }; | 47 }; |
48 | 48 |
49 #endif | 49 #endif |
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