mtklein | 9db912c | 2015-05-19 11:11:26 -0700 | [diff] [blame] | 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 SkMiniRecorder. |
| 28 | SkPicture* detachAsPicture(const SkRect& cull); |
| 29 | |
mtklein | d41ea1d | 2015-05-20 10:16:49 -0700 | [diff] [blame] | 30 | // Flush anything we've recorded to the canvas, resetting this SkMiniRecorder. |
| 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 | |
mtklein | 9db912c | 2015-05-19 11:11:26 -0700 | [diff] [blame] | 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)>::val>::val; |
| 47 | SkAlignedSStorage<kInlineStorage> fBuffer; |
| 48 | }; |
| 49 | |
| 50 | #endif//SkMiniRecorder_DEFINED |