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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 drawBitmapRect(const SkBitmap&, const SkRect* src, const SkRect& dst, | |
| 24 const SkPaint*, SkCanvas::SrcRectConstraint); | |
| 25 bool drawPath(const SkPath&, const SkPaint&); | |
| 26 bool drawRect(const SkRect&, const SkPaint&); | |
| 27 bool drawTextBlob(const SkTextBlob*, SkScalar x, SkScalar y, const SkPaint&)
; | |
| 28 | |
| 29 // Detach anything we've recorded as a picture, resetting this SkMiniRecorde
r. | |
| 30 SkPicture* detachAsPicture(const SkRect& cull); | |
| 31 | |
| 32 // Flush anything we've recorded to the canvas, resetting this SkMiniRecorde
r. | |
| 33 // This is logically the same as but rather more efficient than: | |
| 34 // SkAutoTUnref<SkPicture> pic(this->detachAsPicture(SkRect::MakeEmpty())
); | |
| 35 // pic->playback(canvas); | |
| 36 void flushAndReset(SkCanvas*); | |
| 37 | |
| 38 private: | |
| 39 enum class State { | |
| 40 kEmpty, | |
| 41 kDrawBitmapRectFixedSize, | |
| 42 kDrawPath, | |
| 43 kDrawRect, | |
| 44 kDrawTextBlob, | |
| 45 }; | |
| 46 | |
| 47 State fState; | |
| 48 | |
| 49 template <size_t A, size_t B> | |
| 50 struct Max { static const size_t val = A > B ? A : B; }; | |
| 51 | |
| 52 static const size_t kInlineStorage = | |
| 53 Max<sizeof(SkRecords::DrawBitmapRectFixedSize), | |
| 54 Max<sizeof(SkRecords::DrawPath), | |
| 55 Max<sizeof(SkRecords::DrawRect), | |
| 56 sizeof(SkRecords::DrawTextBlob)>::val>::val>::val; | |
| 57 SkAlignedSStorage<kInlineStorage> fBuffer; | |
| 58 }; | |
| 59 | |
| 60 #endif//SkMiniRecorder_DEFINED | |
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