diff options
Diffstat (limited to 'src/core/SkMiniRecorder.h')
-rw-r--r-- | src/core/SkMiniRecorder.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/src/core/SkMiniRecorder.h b/src/core/SkMiniRecorder.h new file mode 100644 index 0000000000..fd1e8f624d --- /dev/null +++ b/src/core/SkMiniRecorder.h @@ -0,0 +1,57 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkMiniRecorder_DEFINED +#define SkMiniRecorder_DEFINED + +#include "SkRecords.h" +#include "SkScalar.h" +#include "SkTypes.h" +class SkCanvas; + +// Records small pictures, but only a limited subset of the canvas API, and may fail. +class SkMiniRecorder : SkNoncopyable { +public: + SkMiniRecorder(); + ~SkMiniRecorder(); + + // Try to record an op. Returns false on failure. + bool drawPath(const SkPath&, const SkPaint&); + bool drawRect(const SkRect&, const SkPaint&); + bool drawTextBlob(const SkTextBlob*, SkScalar x, SkScalar y, const SkPaint&); + + // Detach anything we've recorded as a picture, resetting this SkMiniRecorder. + // If cull is nullptr we'll calculate it. + sk_sp<SkPicture> detachAsPicture(const SkRect* cull); + + // Flush anything we've recorded to the canvas, resetting this SkMiniRecorder. + // This is logically the same as but rather more efficient than: + // sk_sp<SkPicture> pic(this->detachAsPicture(nullptr)); + // pic->playback(canvas); + void flushAndReset(SkCanvas*); + +private: + enum class State { + kEmpty, + kDrawPath, + kDrawRect, + kDrawTextBlob, + }; + + State fState; + + template <size_t A, size_t B> + struct Max { static const size_t val = A > B ? A : B; }; + + static const size_t kInlineStorage = + Max<sizeof(SkRecords::DrawPath), + Max<sizeof(SkRecords::DrawRect), + sizeof(SkRecords::DrawTextBlob)>::val>::val; + SkAlignedSStorage<kInlineStorage> fBuffer; +}; + +#endif//SkMiniRecorder_DEFINED |