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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 "SkBigPicture.h"
#include "SkCanvas.h"
#include "SkMatrix.h"
#include "SkRecord.h"
class SkDrawable;
class SkLayerInfo;
// Calculate conservative identity space bounds for each op in the record.
void SkRecordFillBounds(const SkRect& cullRect, const SkRecord&, SkRect bounds[]);
// SkRecordFillBounds(), and gathers information about saveLayers and stores it for later
// use (e.g., layer hoisting). The gathered information is sufficient to determine
// where each saveLayer will land and which ops in the picture it represents.
void SkRecordComputeLayers(const SkRect& cullRect, const SkRecord&, SkRect bounds[],
const SkBigPicture::SnapshotArray*, SkLayerInfo* data);
// Draw an SkRecord into an SkCanvas. A convenience wrapper around SkRecords::Draw.
void SkRecordDraw(const SkRecord&, SkCanvas*, SkPicture const* const drawablePicts[],
SkDrawable* const drawables[], int drawableCount,
const SkBBoxHierarchy*, SkPicture::AbortCallback*);
// Draw a portion of an SkRecord into an SkCanvas.
// 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,
int start, int 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[],
SkDrawable* const drawables[], int drawableCount,
const SkMatrix* initialCTM = nullptr)
: 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;
SkDrawable* const* fDrawables;
int fDrawableCount;
};
} // namespace SkRecords
#endif//SkRecordDraw_DEFINED
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