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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 SkMultiPictureDraw_DEFINED
#define SkMultiPictureDraw_DEFINED
#include "SkMatrix.h"
#include "SkTDArray.h"
class SkCanvas;
class SkPaint;
class SkPicture;
/** \class SkMultiPictureDraw
The MultiPictureDraw object accepts several picture/canvas pairs and
then attempts to optimally draw the pictures into the canvases, sharing
as many resources as possible.
*/
class SK_API SkMultiPictureDraw {
public:
/**
* Create an object to optimize the drawing of multiple pictures.
* @param reserve Hint for the number of add calls expected to be issued
*/
SkMultiPictureDraw(int reserve = 0);
~SkMultiPictureDraw() { this->reset(); }
/**
* Add a canvas/picture pair for later rendering.
* @param canvas the canvas in which to draw picture
* @param picture the picture to draw into canvas
* @param matrix if non-NULL, applied to the CTM when drawing
* @param paint if non-NULL, draw picture to a temporary buffer
* and then apply the paint when the result is drawn
*/
void add(SkCanvas* canvas,
const SkPicture* picture,
const SkMatrix* matrix = NULL,
const SkPaint* paint = NULL);
/**
* Perform all the previously added draws. This will reset the state
* of this object. If flush is true, all canvases are flushed after
* draw.
*/
void draw(bool flush = false);
/**
* Abandon all buffered draws and reset to the initial state.
*/
void reset();
private:
struct DrawData {
SkCanvas* fCanvas; // reffed
const SkPicture* fPicture; // reffed
SkMatrix fMatrix;
SkPaint* fPaint; // owned
void init(SkCanvas*, const SkPicture*, const SkMatrix*, const SkPaint*);
void draw();
static void Reset(SkTDArray<DrawData>&);
static void Draw(DrawData* d) { d->draw(); }
};
SkTDArray<DrawData> fThreadSafeDrawData;
SkTDArray<DrawData> fGPUDrawData;
};
#endif
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