#ifndef FXHISTOGRAMRENDER_H
#define FXHISTOGRAMRENDER_H

#include "tcommon.h"
#include <QWidget>

#include "tfx.h"
#include "trenderer.h"
#include "tthreadmessage.h"

#undef DVAPI
#undef DVVAR
#ifdef TOONZQT_EXPORTS
#define DVAPI DV_EXPORT_API
#define DVVAR DV_EXPORT_VAR
#else
#define DVAPI DV_IMPORT_API
#define DVVAR DV_IMPORT_VAR
#endif

// forward declaration
class Histograms;
class TFxHandle;
class TFrameHandle;
class TXsheetHandle;
class TSceneHandle;
class TXshLevelHandle;
class ToonzScene;

//=========================================================
// FxHistogramRenderPort
//---------------------------------------------------------
//!Implements the TRenderPort virtual class
//!This class receives and handles signals from the TThread::Runnable class that make the render of frame.
class FxHistogramRenderPort : public QObject, public TRenderPort
{
	Q_OBJECT

public:
	FxHistogramRenderPort();
	~FxHistogramRenderPort();

	void onRenderRasterCompleted(const RenderData &renderData);
	void onRenderFailure(const RenderData &renderData, TException &e){};
	void onRenderFinished(){};

signals:

	void renderCompleted(const TRasterP &, UINT);
	void renderFailure(double);
};

//=========================================================
// FxHistogramRender
//---------------------------------------------------------

class DVAPI FxHistogramRender : public QObject
{
	Q_OBJECT

private:
	//! Stores some information about the frame to render needed to the PreviewFxManager class
	class FrameInfo
	{
	public:
		FrameInfo()
			: m_frame(-1), m_renderId((UINT)-1) {}

		TFxP m_fx;
		std::string m_fxAlias;
		int m_frame;
		//! renderId given from renderer
		UINT m_renderId;
	};

	FxHistogramRenderPort *m_renderPort;
	TRenderer m_renderer;
	FrameInfo m_lastFrameInfo;
	TThread::Mutex m_mutex;
	QList<UINT> m_abortedRendering;
	ToonzScene *m_scene;
	Histograms *m_histograms;
	bool m_isCameraViewMode;

public:
	FxHistogramRender();
	~FxHistogramRender();

	static FxHistogramRender *instance();

	void setScene(ToonzScene *scene);
	void setHistograms(Histograms *histograms);

	void setIsCameraViewMode(bool isCameraViewMode) { m_isCameraViewMode = isCameraViewMode; }
	bool isCameraViewMode() { return m_isCameraViewMode; }

	void computeHistogram(TFxP fx, int frame);
	void invalidateFrame(int frame);

private:
	void remakeRender();
	void updateRenderer(int frame);

protected slots:
	void onRenderCompleted(const TRasterP &, UINT);
};

#endif // FXHISTOGRAMRENDER_H