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 SkMiniRecorder. 30 SkPicture* detachAsPicture(const SkRect& cull); 31 32 // Flush anything we've recorded to the canvas, resetting this SkMiniRecorder. 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 61
