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1 /* | 1 /* |
2 * Copyright 2014 Google Inc. | 2 * Copyright 2014 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 SkRecordDraw_DEFINED | 8 #ifndef SkRecordDraw_DEFINED |
9 #define SkRecordDraw_DEFINED | 9 #define SkRecordDraw_DEFINED |
10 | 10 |
11 #include "SkRecord.h" | 11 #include "SkRecord.h" |
12 #include "SkCanvas.h" | 12 #include "SkCanvas.h" |
13 #include "SkDrawPictureCallback.h" | 13 #include "SkDrawPictureCallback.h" |
14 | 14 |
15 // Draw an SkRecord into an SkCanvas. A convenience wrapper around SkRecords::D
raw. | 15 // Draw an SkRecord into an SkCanvas. A convenience wrapper around SkRecords::D
raw. |
16 void SkRecordDraw(const SkRecord&, SkCanvas*, SkDrawPictureCallback* = NULL); | 16 void SkRecordDraw(const SkRecord&, SkCanvas*, SkDrawPictureCallback* = NULL); |
17 | 17 |
18 namespace SkRecords { | 18 namespace SkRecords { |
19 | 19 |
20 // This is an SkRecord visitor that will draw that SkRecord to an SkCanvas. | 20 // This is an SkRecord visitor that will draw that SkRecord to an SkCanvas. |
21 class Draw : SkNoncopyable { | 21 class Draw : SkNoncopyable { |
22 public: | 22 public: |
23 explicit Draw(SkCanvas* canvas) | 23 explicit Draw(SkCanvas* canvas) |
24 : fInitialCTM(canvas->getTotalMatrix()), fCanvas(canvas), fIndex(0) {} | 24 : fInitialCTM(canvas->getTotalMatrix()), fCanvas(canvas), fIndex(0) {} |
25 | 25 |
26 unsigned index() const { return fIndex; } | 26 unsigned index() const { return fIndex; } |
27 void next() { ++fIndex; } | 27 void next() { ++fIndex; } |
28 | 28 |
29 template <typename T> void operator()(const T& r) { | 29 template <typename T> void operator()(const T& r) { |
30 if (!this->skip(r)) { | 30 this->draw(r); |
31 this->draw(r); | |
32 } | |
33 } | 31 } |
34 | 32 |
35 private: | 33 private: |
36 // No base case, so we'll be compile-time checked that we implement all poss
ibilities. | 34 // No base case, so we'll be compile-time checked that we implement all poss
ibilities. |
37 template <typename T> void draw(const T&); | 35 template <typename T> void draw(const T&); |
38 | 36 |
39 // skip() should return true if we can skip this command, false if not. | |
40 // It may update fIndex directly to skip more than just this one command. | |
41 | |
42 // Mostly we just blindly call fCanvas and let it handle quick rejects itsel
f. | |
43 template <typename T> bool skip(const T&) { return false; } | |
44 | |
45 // We add our own quick rejects for commands added by optimizations. | |
46 bool skip(const PairedPushCull&); | |
47 bool skip(const BoundedDrawPosTextH&); | |
48 | |
49 const SkMatrix fInitialCTM; | 37 const SkMatrix fInitialCTM; |
50 SkCanvas* fCanvas; | 38 SkCanvas* fCanvas; |
51 unsigned fIndex; | 39 unsigned fIndex; |
52 }; | 40 }; |
53 | 41 |
54 } // namespace SkRecords | 42 } // namespace SkRecords |
55 | 43 |
56 #endif//SkRecordDraw_DEFINED | 44 #endif//SkRecordDraw_DEFINED |
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