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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkRecordDraw_DEFINED
#define SkRecordDraw_DEFINED
#include "SkBBoxHierarchy.h"
#include "SkCanvas.h"
#include "SkDrawPictureCallback.h"
#include "SkMatrix.h"
#include "SkRecord.h"
class SkCanvasDrawable;
class SkLayerInfo;
// Fill a BBH to be used by SkRecordDraw to accelerate playback.
void SkRecordFillBounds(const SkRect& cullRect, const SkRecord&, SkBBoxHierarchy*);
void SkRecordComputeLayers(const SkRect& cullRect, const SkRecord& record,
const SkPicture::SnapshotArray*,
SkBBoxHierarchy* bbh, SkLayerInfo* data);
// Draw an SkRecord into an SkCanvas. A convenience wrapper around SkRecords::Draw.
void SkRecordDraw(const SkRecord&, SkCanvas*, SkPicture const* const drawablePicts[],
SkCanvasDrawable* const drawables[], int drawableCount,
const SkBBoxHierarchy*, SkDrawPictureCallback*);
// Draw a portion of an SkRecord into an SkCanvas while replacing clears with drawRects.
// When drawing a portion of an SkRecord the CTM on the passed in canvas must be
// the composition of the replay matrix with the record-time CTM (for the portion
// of the record that is being replayed). For setMatrix calls to behave correctly
// the initialCTM parameter must set to just the replay matrix.
void SkRecordPartialDraw(const SkRecord&, SkCanvas*,
SkPicture const* const drawablePicts[], int drawableCount,
const SkRect&, unsigned start, unsigned stop,
const SkMatrix& initialCTM);
namespace SkRecords {
// This is an SkRecord visitor that will draw that SkRecord to an SkCanvas.
class Draw : SkNoncopyable {
public:
explicit Draw(SkCanvas* canvas, SkPicture const* const drawablePicts[],
SkCanvasDrawable* const drawables[], int drawableCount,
const SkMatrix* initialCTM = NULL)
: fInitialCTM(initialCTM ? *initialCTM : canvas->getTotalMatrix())
, fCanvas(canvas)
, fDrawablePicts(drawablePicts)
, fDrawables(drawables)
, fDrawableCount(drawableCount)
{}
// This operator calls methods on the |canvas|. The various draw() wrapper
// methods around SkCanvas are defined by the DRAW() macro in
// SkRecordDraw.cpp.
template <typename T> void operator()(const T& r) {
this->draw(r);
}
protected:
SkPicture const* const* drawablePicts() const { return fDrawablePicts; }
int drawableCount() const { return fDrawableCount; }
private:
// No base case, so we'll be compile-time checked that we implement all possibilities.
template <typename T> void draw(const T&);
const SkMatrix fInitialCTM;
SkCanvas* fCanvas;
SkPicture const* const* fDrawablePicts;
SkCanvasDrawable* const* fDrawables;
int fDrawableCount;
};
// Used by SkRecordPartialDraw.
class PartialDraw : public Draw {
public:
PartialDraw(SkCanvas* canvas, SkPicture const* const drawablePicts[], int drawableCount,
const SkRect& clearRect, const SkMatrix& initialCTM)
: INHERITED(canvas, drawablePicts, NULL, drawableCount, &initialCTM), fClearRect(clearRect)
{}
// Same as Draw for all ops except Clear.
template <typename T> void operator()(const T& r) {
this->INHERITED::operator()(r);
}
void operator()(const Clear& c) {
SkPaint p;
p.setColor(c.color);
DrawRect drawRect(p, fClearRect);
this->INHERITED::operator()(drawRect);
}
private:
const SkRect fClearRect;
typedef Draw INHERITED;
};
} // namespace SkRecords
#endif//SkRecordDraw_DEFINED
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