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1 /* | |
2 * Copyright 2015 Google Inc. | |
3 * | |
4 * Use of this source code is governed by a BSD-style license that can be | |
5 * found in the LICENSE file. | |
6 */ | |
7 | |
8 #ifndef SkMiniRecorder_DEFINED | |
9 #define SkMiniRecorder_DEFINED | |
10 | |
11 #include "SkRecords.h" | |
12 #include "SkScalar.h" | |
13 #include "SkTypes.h" | |
14 class SkCanvas; | |
15 | |
16 // Records small pictures, but only a limited subset of the canvas API, and may
fail. | |
17 class SkMiniRecorder : SkNoncopyable { | |
18 public: | |
19 SkMiniRecorder(); | |
20 ~SkMiniRecorder(); | |
21 | |
22 // Try to record an op. Returns false on failure. | |
23 bool drawPath(const SkPath&, const SkPaint&); | |
24 bool drawRect(const SkRect&, const SkPaint&); | |
25 bool drawTextBlob(const SkTextBlob*, SkScalar x, SkScalar y, const SkPaint&)
; | |
26 | |
27 // Detach anything we've recorded as a picture, resetting this SkMiniRecorde
r. | |
28 SkPicture* detachAsPicture(const SkRect& cull); | |
29 | |
30 // Flush anything we've recorded to the canvas, resetting this SkMiniRecorde
r. | |
31 // This is logically the same as but rather more efficient than: | |
32 // SkAutoTUnref<SkPicture> pic(this->detachAsPicture(SkRect::MakeEmpty())
); | |
33 // pic->playback(canvas); | |
34 void flushAndReset(SkCanvas*); | |
35 | |
36 private: | |
37 enum class State { kEmpty, kDrawPath, kDrawRect, kDrawTextBlob }; | |
38 | |
39 State fState; | |
40 | |
41 template <size_t A, size_t B> | |
42 struct Max { static const size_t val = A > B ? A : B; }; | |
43 | |
44 static const size_t kInlineStorage = Max<sizeof(SkRecords::DrawPath), | |
45 Max<sizeof(SkRecords::DrawRect), | |
46 sizeof(SkRecords::DrawTextBlob)>::v
al>::val; | |
47 SkAlignedSStorage<kInlineStorage> fBuffer; | |
48 }; | |
49 | |
50 #endif//SkMiniRecorder_DEFINED | |
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