// TnzCore includes
#include "tfilepath.h"
#include "tfiletype.h"
#include "tstream.h"
#include "tsystem.h"
#include "timagecache.h"
#include "tpixelutils.h"
#include "tropcm.h"
#include "timageinfo.h"
#include "timage_io.h"
#include "tlevel_io.h"
#include "tofflinegl.h"
#include "tgl.h"
#include "tvectorrenderdata.h"
#include "tstroke.h"
#include "tthreadmessage.h"
#include "tpalette.h"
#include "trasterimage.h"
#include "tvectorimage.h"
#include "ttoonzimage.h"
#include "tmeshimage.h"

// TnzExt includes
#include "ext/meshutils.h"

// TnzLib includes
#include "toonz/toonzscene.h"
#include "toonz/sceneproperties.h"
#include "toonz/txsheet.h"
#include "toonz/tscenehandle.h"
#include "toonz/txshlevel.h"
#include "toonz/txshleveltypes.h"
#include "toonz/txshsimplelevel.h"
#include "toonz/txshchildlevel.h"
#include "toonz/tstageobjectspline.h"
#include "toonz/preferences.h"
#include "toonz/sceneresources.h"
#include "toonz/stage2.h"

// TnzQt includes
#include "toonzqt/gutil.h"

#include "toonzqt/icongenerator.h"

//=============================================================================

//===================================
//
//    Local namespace
//
//-----------------------------------

namespace
{
const TDimension IconSize(80, 60);
TDimension FilmstripIconSize(0, 0);

//Access name-based storage
std::set<std::string> iconsMap;
typedef std::set<std::string>::iterator IconIterator;

//-----------------------------------------------------------------------------

//Returns true if the image request was already submitted.
bool getIcon(const std::string &iconName, QPixmap &pix, TXshSimpleLevel *simpleLevel = 0)
{
	IconIterator it;
	it = iconsMap.find(iconName);

	if (it != iconsMap.end()) {
		TImageP im = TImageCache::instance()->get(iconName, false);
		TToonzImage *timgp = dynamic_cast<TToonzImage *>(im.getPointer());

		if (simpleLevel && timgp) {
			IconGenerator::Settings settings = IconGenerator::instance()->getSettings();

			TRaster32P icon(timgp->getSize());
			icon->clear();
			icon->fill((settings.m_blackBgCheck) ? TPixel::Black : TPixel::White);
			if (settings.m_transparencyCheck ||
				settings.m_inkIndex != -1 ||
				settings.m_paintIndex != -1) {
				TRop::CmappedQuickputSettings s;
				s.m_globalColorScale = TPixel32::Black;
				s.m_inksOnly = false;
				s.m_transparencyCheck = settings.m_transparencyCheck;
				s.m_blackBgCheck = settings.m_blackBgCheck;
				s.m_inkIndex = settings.m_inkIndex;
				s.m_paintIndex = settings.m_paintIndex;
				Preferences::instance()->getTranspCheckData(s.m_transpCheckBg, s.m_transpCheckInk, s.m_transpCheckPaint);

				TRop::quickPut(icon, timgp->getRaster(), simpleLevel->getPalette(), TAffine(), s);
			} else
				TRop::quickPut(icon, timgp->getRaster(), simpleLevel->getPalette(), TAffine());
			pix = rasterToQPixmap(icon, false);
			return true;
		}
		TRasterImageP img = static_cast<TRasterImageP>(im);

		if (!img) {
			pix = QPixmap();
			return true;
		}
		assert(!(TRasterGR8P)img->getRaster());
		const TRaster32P &ras = img->getRaster();
		pix = rasterToQPixmap(ras, false);
		return true;
	}

	return false;
}

//-----------------------------------------------------------------------------

void setIcon(const std::string &iconName, const TRaster32P &icon)
{
	if (iconsMap.find(iconName) != iconsMap.end())
		TImageCache::instance()->add(iconName, TRasterImageP(icon), true);
}

//-----------------------------------------------------------------------------
/*! Cache icon data in TToonzImage format if ToonzImageIconRenderer generates them
*/
void setIcon_TnzImg(const std::string &iconName, const TRasterCM32P &icon)
{
	if (iconsMap.find(iconName) != iconsMap.end())
		TImageCache::instance()->add(iconName, TToonzImageP(icon, TRect(icon->getSize())), true);
}

//-----------------------------------------------------------------------------

void removeIcon(const std::string &iconName)
{
	IconIterator it;
	it = iconsMap.find(iconName);
	if (it != iconsMap.end()) {
		TImageCache::instance()->remove(iconName);
	}
	iconsMap.erase(iconName);
}

//-----------------------------------------------------------------------------

bool isUnpremultiplied(const TRaster32P &r)
{
	int lx = r->getLx();
	int y = r->getLy();
	r->lock();
	while (--y >= 0) {
		TPixel32 *pix = r->pixels(y);
		TPixel32 *endPix = pix + lx;
		while (pix < endPix) {
			if (pix->r > pix->m ||
				pix->g > pix->m ||
				pix->b > pix->m) {
				r->unlock();
				return true;
			}
			++pix;
		}
	}
	r->unlock();
	return false;
}

//-----------------------------------------------------------------------------

void makeChessBackground(const TRaster32P &ras)
{
	ras->lock();

	const TPixel32 gray1(230, 230, 230, 255), gray2(180, 180, 180, 255);

	int lx = ras->getLx(), ly = ras->getLy();
	for (int y = 0; y != ly; ++y) {
		TPixel32 *pix = ras->pixels(y), *lineEnd = pix + lx;

		int yCol = (y & 4);

		for (int x = 0; pix != lineEnd; ++x, ++pix)
			if (pix->m != 255)
				*pix = overPix((x & 4) == yCol ? gray1 : gray2, *pix);
	}

	ras->unlock();
}

} // namespace

//=============================================================================

//==========================================
//
//    Image-to-Icon convertion methods
//
//------------------------------------------

namespace
{
TRaster32P convertToIcon(
	TVectorImageP vimage,
	int frame,
	const TDimension &iconSize,
	const IconGenerator::Settings &settings)
{
	if (!vimage)
		return TRaster32P();

	TPalette *plt = vimage->getPalette()->clone();
	if (!plt)
		return TRaster32P();
	plt->setFrame(frame);

	TOfflineGL *glContext = IconGenerator::instance()->getOfflineGLContext();

	// l'immagine e' contenuta dentro imageBox (aggiungo un piccolo margine anche
	// per evitare problemi con immagini vuote)
	TRectD imageBox;
	{
		QMutexLocker sl(vimage->getMutex());
		imageBox = vimage->getBBox().enlarge(.1);
	}
	TPointD imageCenter = (imageBox.getP00() + imageBox.getP11()) * 0.5;

	// calcolo una matrice di trasformazione che sposti l'immagine dentro l'icona.
	// il fattore di scala e' scelto in modo che l'immagine sia interamente
	// contenuta nell'icona (con un margine di 'margin' pixel)
	const int margin = 10;
	double scx = (iconSize.lx - margin) / imageBox.getLx();
	double scy = (iconSize.ly - margin) / imageBox.getLy();
	double sc = tmin(scx, scy);
	// aggiungo la traslazione: il punto centrale dell'immagine va nel punto
	// centrale della pixmap
	TPointD iconCenter(iconSize.lx * 0.5, iconSize.ly * 0.5);
	TAffine aff = TScale(sc).place(imageCenter, iconCenter);

	// RenderData
	TVectorRenderData rd(
		aff,
		TRect(iconSize),
		plt,
		0, true);

	rd.m_tcheckEnabled = settings.m_transparencyCheck;
	rd.m_blackBgEnabled = settings.m_blackBgCheck;
	rd.m_drawRegions = !settings.m_inksOnly;
	rd.m_inkCheckEnabled = settings.m_inkIndex != -1;
	rd.m_paintCheckEnabled = settings.m_paintIndex != -1;
	rd.m_colorCheckIndex = rd.m_inkCheckEnabled ? settings.m_inkIndex : settings.m_paintIndex;
	rd.m_isIcon = true;

	// disegno l'immagine
	glContext->makeCurrent();
	glContext->clear(rd.m_blackBgEnabled ? TPixel::Black : TPixel32::White);
	glContext->draw(vimage, rd);

	TRaster32P ras(iconSize);
	glContext->getRaster(ras);

	glContext->doneCurrent();

	delete plt;

	return ras;
}

//-------------------------------------------------------------------------

TRaster32P convertToIcon(
	TToonzImageP timage,
	int frame,
	const TDimension &iconSize,
	const IconGenerator::Settings &settings)
{
	if (!timage)
		return TRaster32P();

	TPalette *plt = timage->getPalette();
	if (!plt)
		return TRaster32P();

	plt->setFrame(frame);

	TRasterCM32P rasCM32 = timage->getRaster();
	if (!rasCM32.getPointer())
		return TRaster32P();

	int lx = rasCM32->getSize().lx;
	int ly = rasCM32->getSize().ly;
	int iconLx = iconSize.lx, iconLy = iconSize.ly;
	if (tmax(double(lx) / iconSize.lx, double(ly) / iconSize.ly) == double(ly) / iconSize.ly)
		iconLx = tround((double(lx) * iconSize.ly) / ly);
	else
		iconLy = tround((double(ly) * iconSize.lx) / lx);

	TDimension iconSize2 = TDimension(iconLx, iconLy); // dimensione dell'icona con aspectRatio esatto

	TRaster32P icon(iconSize2);
	icon->clear();
	icon->fill(settings.m_blackBgCheck ? TPixel::Black : TPixel::White);

	TDimension dim = rasCM32->getSize();
	if (dim != iconSize2) {
		TRasterCM32P auxCM32(icon->getSize());
		auxCM32->clear();
		TRop::makeIcon(auxCM32, rasCM32);
		rasCM32 = auxCM32;
	}

	if (settings.m_transparencyCheck ||
		settings.m_inksOnly ||
		settings.m_inkIndex != -1 ||
		settings.m_paintIndex != -1) {
		TRop::CmappedQuickputSettings s;
		s.m_globalColorScale = TPixel32::Black;
		s.m_inksOnly = settings.m_inksOnly;
		s.m_transparencyCheck = settings.m_transparencyCheck;
		s.m_blackBgCheck = settings.m_blackBgCheck;
		s.m_inkIndex = settings.m_inkIndex;
		s.m_paintIndex = settings.m_paintIndex;
		Preferences::instance()->getTranspCheckData(s.m_transpCheckBg, s.m_transpCheckInk, s.m_transpCheckPaint);

		TRop::quickPut(icon, rasCM32, timage->getPalette(), TAffine(), s);
	} else
		TRop::quickPut(icon, rasCM32, timage->getPalette(), TAffine());

	assert(iconSize2.lx <= iconSize.lx && iconSize2.ly <= iconSize.ly);
	TRaster32P outIcon(iconSize);
	outIcon->clear();
	int dx = (outIcon->getLx() - icon->getLx()) / 2;
	int dy = (outIcon->getLy() - icon->getLy()) / 2;
	assert(dx >= 0 && dy >= 0);
	TRect box = outIcon->getBounds().enlarge(-dx, -dy);
	TRop::copy(outIcon->extract(box), icon);

	return outIcon;
}

//-------------------------------------------------------------------------

TRaster32P convertToIcon(
	TRasterImageP rimage,
	const TDimension &iconSize)
{
	if (!rimage)
		return TRaster32P();

	TRasterP ras = rimage->getRaster();

	if (!(TRaster32P)ras && !(TRasterGR8P)ras)
		return TRaster32P();

	if (ras->getSize() == iconSize)
		return ras;

	TRaster32P icon(iconSize);
	icon->fill(TPixel32(235, 235, 235));

	double sx = (double)icon->getLx() / ras->getLx();
	double sy = (double)icon->getLy() / ras->getLy();
	double sc = sx < sy ? sx : sy;

	TAffine aff = TScale(sc).place(ras->getCenterD(), icon->getCenterD());
	TRop::resample(icon, ras, aff, TRop::Bilinear);
	TRop::addBackground(icon, TPixel32::White);

	return icon;
}

//-------------------------------------------------------------------------

TRaster32P convertToIcon(
	TMeshImageP mi,
	int frame,
	const TDimension &iconSize,
	const IconGenerator::Settings &settings)
{
	if (!mi)
		return TRaster32P();

	TOfflineGL *glContext = IconGenerator::instance()->getOfflineGLContext();

	// l'immagine e' contenuta dentro imageBox (aggiungo un piccolo margine anche
	// per evitare problemi con immagini vuote)
	TRectD imageBox;
	imageBox = mi->getBBox().enlarge(.1);

	TPointD imageCenter(0.5 * (imageBox.getP00() + imageBox.getP11()));

	// calcolo una matrice di trasformazione che sposti l'immagine dentro l'icona.
	// il fattore di scala e' scelto in modo che l'immagine sia interamente
	// contenuta nell'icona (con un margine di 'margin' pixel)
	const int margin = 10;
	double scx = (iconSize.lx - margin) / imageBox.getLx();
	double scy = (iconSize.ly - margin) / imageBox.getLy();
	double sc = tmin(scx, scy);

	// aggiungo la traslazione: il punto centrale dell'immagine va nel punto
	// centrale della pixmap
	TPointD iconCenter(iconSize.lx * 0.5, iconSize.ly * 0.5);
	TAffine aff = TScale(sc).place(imageCenter, iconCenter);

	// disegno l'immagine
	glContext->makeCurrent();
	glContext->clear(settings.m_blackBgCheck ? TPixel::Black : TPixel32::White);

	glPushAttrib(GL_ENABLE_BIT | GL_COLOR_BUFFER_BIT);
	glEnable(GL_BLEND);
	glEnable(GL_LINE_SMOOTH);

	glPushMatrix();
	tglMultMatrix(aff);

	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

	glColor4f(0.0f, 1.0f, 0.0f, 0.7f);
	tglDrawEdges(*mi);

	glPopMatrix();

	glPopAttrib();

	TRaster32P ras(iconSize);
	glContext->getRaster(ras);

	glContext->doneCurrent();

	return ras;
}

//-------------------------------------------------------------------------

TRaster32P convertToIcon(
	TImageP image,
	int frame,
	const TDimension &iconSize,
	const IconGenerator::Settings &settings)
{
	TRasterImageP ri(image);
	if (ri)
		return convertToIcon(ri, iconSize);

	TToonzImageP ti(image);
	if (ti)
		return convertToIcon(ti, frame, iconSize, settings);

	TVectorImageP vi(image);
	if (vi)
		return convertToIcon(vi, frame, iconSize, settings);

	TMeshImageP mi(image);
	if (mi)
		return convertToIcon(mi, frame, iconSize, settings);

	return TRaster32P();
}

} // namespace

//=============================================================================

//============================
//
//    IconRenderer class
//
//----------------------------

class IconRenderer : public TThread::Runnable
{
	TRaster32P m_icon;
	TDimension m_iconSize;
	std::string m_id;

	bool m_started;
	bool m_terminated;

public:
	IconRenderer(const std::string &id, const TDimension &iconSize);
	virtual ~IconRenderer();

	virtual void run() = 0;

	void setIcon(const TRaster32P &icon) { m_icon = icon; }
	TRaster32P getIcon() const { return m_icon; }

	TDimension getIconSize() { return m_iconSize; }
	const std::string &getId() const { return m_id; }

	bool &hasStarted() { return m_started; }
	bool &wasTerminated() { return m_terminated; }
};

//-----------------------------------------------------------------------------

IconRenderer::IconRenderer(const std::string &id, const TDimension &iconSize)
	: m_icon(), m_iconSize(iconSize), m_id(id), m_started(false), m_terminated(false)
{
	connect(this, SIGNAL(started(TThread::RunnableP)), IconGenerator::instance(), SLOT(onStarted(TThread::RunnableP)));
	connect(this, SIGNAL(finished(TThread::RunnableP)), IconGenerator::instance(), SLOT(onFinished(TThread::RunnableP)));
	connect(this, SIGNAL(canceled(TThread::RunnableP)), IconGenerator::instance(), SLOT(onCanceled(TThread::RunnableP)),
			Qt::QueuedConnection);
	connect(this, SIGNAL(terminated(TThread::RunnableP)), IconGenerator::instance(), SLOT(onTerminated(TThread::RunnableP)),
			Qt::QueuedConnection);
}

//-----------------------------------------------------------------------------

IconRenderer::~IconRenderer()
{
}

//=============================================================================

//===================================
//
//    Specific icon renderers
//
//-----------------------------------

//=============================================================================

//======================================
//    VectorImageIconRenderer class
//--------------------------------------

class VectorImageIconRenderer : public IconRenderer
{
	TVectorImageP m_vimage;
	TXshSimpleLevelP m_sl;
	TFrameId m_fid;
	IconGenerator::Settings m_settings;

public:
	VectorImageIconRenderer(
		const std::string &id,
		const TDimension &iconSize,
		TXshSimpleLevelP sl,
		const TFrameId &fid,
		const IconGenerator::Settings &settings)
		: IconRenderer(id, iconSize), m_vimage(), m_sl(sl), m_fid(fid), m_settings(settings) {}

	VectorImageIconRenderer(
		const std::string &id,
		const TDimension &iconSize,
		TVectorImageP vimage,
		const IconGenerator::Settings &settings)
		: IconRenderer(id, iconSize), m_vimage(vimage), m_sl(0), m_fid(-1), m_settings(settings) {}

	TRaster32P generateRaster(const TDimension &iconSize) const;
	void run();
};

//-----------------------------------------------------------------------------

TRaster32P VectorImageIconRenderer::generateRaster(const TDimension &iconSize) const
{
	TVectorImageP vimage;

	int frame = 0;
	if (!m_vimage) {
		assert(m_sl);
		if (!m_sl->isFid(m_fid))
			return TRaster32P();
		TImageP image = m_sl->getFrameIcon(m_fid);
		if (!image)
			return TRaster32P();
		vimage = (TVectorImageP)image;
		if (!vimage)
			return TRaster32P();
		frame = m_sl->guessIndex(m_fid);
	} else
		vimage = m_vimage;
	assert(vimage);

	TRaster32P ras(convertToIcon(vimage, frame, iconSize, m_settings));

	return ras;
}

//-----------------------------------------------------------------------------

void VectorImageIconRenderer::run()
{
	try {
		TRaster32P ras(generateRaster(getIconSize()));

		if (ras)
			setIcon(ras);
	} catch (...) {
	}
}

//=============================================================================

//======================================
//    SplineImageIconRenderer class
//--------------------------------------

class SplineIconRenderer : public IconRenderer
{
	TStageObjectSpline *m_spline;

public:
	SplineIconRenderer(const std::string &id, const TDimension &iconSize, TStageObjectSpline *spline)
		: IconRenderer(id, iconSize), m_spline(spline) {}

	TRaster32P generateRaster(const TDimension &iconSize) const;
	void run();
};

//-----------------------------------------------------------------------------

TRaster32P SplineIconRenderer::generateRaster(const TDimension &iconSize) const
{
	//get the glContext
	TOfflineGL *glContext = IconGenerator::instance()->getOfflineGLContext();
	glContext->makeCurrent();
	glContext->clear(TPixel32::White);

	const TStroke *stroke = m_spline->getStroke();
	assert(stroke);
	if (!stroke)
		return TRaster32P();
	TRectD sbbox = stroke->getBBox();

	glColor3d(0, 0, 0);
	double scaleX = 1, scaleY = 1;
	if (sbbox.getLx() > 0.0)
		scaleX = (double)iconSize.lx / sbbox.getLx();
	if (sbbox.getLy() > 0.0)
		scaleY = (double)iconSize.ly / sbbox.getLy();
	double scale = 0.8 * tmin(scaleX, scaleY);
	TPointD centerStroke = 0.5 * (sbbox.getP00() + sbbox.getP11());
	TPointD centerPixmap(iconSize.lx * 0.5, iconSize.ly * 0.5);
	glPushMatrix();
	tglMultMatrix(TScale(scale).place(centerStroke, centerPixmap));
	int n = 50;
	glBegin(GL_LINE_STRIP);
	for (int i = 0; i < n; i++)
		tglVertex(stroke->getPoint((double)i / (double)(n - 1)));
	glEnd();
	glPopMatrix();

	TRaster32P ras(iconSize);
	glContext->getRaster(ras);
	glContext->doneCurrent();
	return ras;
}

//-----------------------------------------------------------------------------

void SplineIconRenderer::run()
{
	TRaster32P raster = generateRaster(getIconSize());
	if (raster)
		setIcon(raster);
}

//=============================================================================

//======================================
//    RasterImageIconRenderer class
//--------------------------------------

class RasterImageIconRenderer : public IconRenderer
{
	TXshSimpleLevelP m_sl;
	TFrameId m_fid;

public:
	RasterImageIconRenderer(
		const std::string &id,
		const TDimension &iconSize,
		TXshSimpleLevelP sl,
		const TFrameId &fid)
		: IconRenderer(id, iconSize),
		  m_sl(sl),
		  m_fid(fid) {}

	void run();
};

//-----------------------------------------------------------------------------

void RasterImageIconRenderer::run()
{
	if (!m_sl->isFid(m_fid))
		return;

	TImageP image = m_sl->getFrameIcon(m_fid);
	if (!image)
		return;

	TRasterImageP rimage = (TRasterImageP)image;
	assert(rimage);

	TRaster32P icon(convertToIcon(rimage, getIconSize()));

	if (icon)
		setIcon(icon);
}

//=============================================================================

//======================================
//    ToonzImageIconRenderer class
//--------------------------------------

class ToonzImageIconRenderer : public IconRenderer
{
	TXshSimpleLevelP m_sl;
	TFrameId m_fid;
	IconGenerator::Settings m_settings;

	TRasterCM32P m_tnzImgIcon;

public:
	ToonzImageIconRenderer(
		const std::string &id,
		const TDimension &iconSize,
		TXshSimpleLevelP sl,
		const TFrameId &fid,
		const IconGenerator::Settings &settings)
		: IconRenderer(id, iconSize), m_sl(sl), m_fid(fid), m_settings(settings), m_tnzImgIcon(0) {}

	void run();

	void setIcon_TnzImg(const TRasterCM32P &timgp) { m_tnzImgIcon = timgp; }
	TRasterCM32P getIcon_TnzImg() const { return m_tnzImgIcon; }
};

//-----------------------------------------------------------------------------

void ToonzImageIconRenderer::run()
{
	if (!m_sl->isFid(m_fid))
		return;

	TImageP image = m_sl->getFrameIcon(m_fid);
	if (!image)
		return;

	TRasterImageP rimage(image);
	if (rimage) {
		TRaster32P icon(convertToIcon(rimage, getIconSize()));
		if (icon)
			setIcon(icon);

		return;
	}

	TToonzImageP timage = (TToonzImageP)image;

	TDimension iconSize(getIconSize());
	if (!timage) {
		TRaster32P p(iconSize.lx, iconSize.ly);
		p->fill(TPixelRGBM32::Yellow);
		setIcon(p);

		return;
	}

	TRasterCM32P rasCM32 = timage->getRaster();
	if (!rasCM32.getPointer())
		return;

	int lx = rasCM32->getSize().lx;
	int ly = rasCM32->getSize().ly;
	int iconLx = iconSize.lx, iconLy = iconSize.ly;

	TRaster32P icon(iconSize);

	icon->fill(m_settings.m_blackBgCheck ? TPixel::Black : TPixel::White);

	if (lx != iconLx && ly != iconLy) {
		// The icons stored in the tlv file don't have the required size.
		// Fetch the original and iconize it.

		image = m_sl->getFrame(m_fid, ImageManager::dontPutInCache, 0); // 0 uses the level properties' subsampling
		if (!image)
			return;

		timage = (TToonzImageP)image;
		if (!timage) {
			TRaster32P p(iconSize.lx, iconSize.ly);
			p->fill(TPixelRGBM32::Yellow);
			setIcon(p);

			return;
		}

		rasCM32 = timage->getRaster();
		if (!rasCM32.getPointer())
			return;

		TRasterCM32P auxCM32(icon->getSize());
		auxCM32->clear();

		TRop::makeIcon(auxCM32, rasCM32);
		rasCM32 = auxCM32;
	}

	if (!m_sl->getPalette())
		return;

	TPaletteP plt = m_sl->getPalette()->clone();
	if (!plt)
		return;

	int frame = m_sl->guessIndex(m_fid);
	plt->setFrame(frame);

	setIcon_TnzImg(rasCM32);
}

//=============================================================================

//======================================
//    MeshImageIconRenderer class
//--------------------------------------

class MeshImageIconRenderer : public IconRenderer
{
	TMeshImageP m_image;
	TXshSimpleLevelP m_sl;
	TFrameId m_fid;
	IconGenerator::Settings m_settings;

public:
	MeshImageIconRenderer(
		const std::string &id,
		const TDimension &iconSize,
		TXshSimpleLevelP sl,
		const TFrameId &fid,
		const IconGenerator::Settings &settings)
		: IconRenderer(id, iconSize), m_image(), m_sl(sl), m_fid(fid), m_settings(settings) {}

	MeshImageIconRenderer(
		const std::string &id,
		const TDimension &iconSize,
		TMeshImageP image,
		const IconGenerator::Settings &settings)
		: IconRenderer(id, iconSize), m_image(image), m_sl(0), m_fid(-1), m_settings(settings) {}

	TRaster32P generateRaster(const TDimension &iconSize) const;
	void run();
};

//-----------------------------------------------------------------------------

TRaster32P MeshImageIconRenderer::generateRaster(const TDimension &iconSize) const
{
	TMeshImageP mi;

	int frame = 0;
	if (!m_image) {
		assert(m_sl);
		if (!m_sl->isFid(m_fid))
			return TRaster32P();

		TImageP image = m_sl->getFrameIcon(m_fid);
		if (!image)
			return TRaster32P();

		mi = (TMeshImageP)image;
		if (!mi)
			return TRaster32P();

		frame = m_sl->guessIndex(m_fid);
	} else
		mi = m_image;

	assert(mi);

	return convertToIcon(mi, frame, iconSize, m_settings);
}

//-----------------------------------------------------------------------------

void MeshImageIconRenderer::run()
{
	try {
		TRaster32P ras(generateRaster(getIconSize()));

		if (ras)
			setIcon(ras);
	} catch (...) {
	}
}

//=============================================================================

//==================================
//    XsheetIconRenderer class
//----------------------------------

class XsheetIconRenderer : public IconRenderer
{
	TXsheet *m_xsheet;
	int m_row;

public:
	XsheetIconRenderer(const std::string &id, const TDimension &iconSize, TXsheet *xsheet, int row = 0)
		: IconRenderer(id, iconSize), m_xsheet(xsheet), m_row(row)
	{
		if (m_xsheet) {
			assert(m_xsheet->getRefCount() > 0);
			m_xsheet->addRef();
		}
	}

	~XsheetIconRenderer()
	{
		if (m_xsheet)
			m_xsheet->release();
	}

	static std::string getId(TXshChildLevel *level, int row)
	{
		return "sub:" + toString(level->getName()) + toString(row);
	}

	TRaster32P generateRaster(const TDimension &iconSize) const;
	void run();
};

//-----------------------------------------------------------------------------

TRaster32P XsheetIconRenderer::generateRaster(const TDimension &iconSize) const
{
	ToonzScene *scene = m_xsheet->getScene();

	TRaster32P ras(iconSize);

	TPixel32 bgColor = scene->getProperties()->getBgColor();
	bgColor.m = 255;
	ras->fill(bgColor);

	TImageCache::instance()->setEnabled(false);

	//All checks are disabled
	scene->renderFrame(ras, m_row, m_xsheet, false);

	TImageCache::instance()->setEnabled(true);

	return ras;
}

//-----------------------------------------------------------------------------

void XsheetIconRenderer::run()
{
	TRaster32P ras = generateRaster(getIconSize());
	if (ras)
		setIcon(ras);
}

//=============================================================================

//================================
//    FileIconRenderer class
//--------------------------------

class FileIconRenderer : public IconRenderer
{
	TFilePath m_path;
	TFrameId m_fid;

public:
	FileIconRenderer(
		const TDimension &iconSize,
		const TFilePath &path,
		const TFrameId &fid)
		: IconRenderer(getId(path, fid), iconSize), m_path(path), m_fid(fid) {}

	static std::string getId(const TFilePath &path, const TFrameId &fid);

	void run();
};

//-----------------------------------------------------------------------------

std::string FileIconRenderer::getId(const TFilePath &path, const TFrameId &fid)
{
	std::string type(path.getType());

	if (type == "tab" || type == "tnz" || type == "mesh" || // meshes are not currently viewable
		TFileType::isViewable(TFileType::getInfo(path))) {
		string fidNumber;
		if (fid != TFrameId::NO_FRAME)
			fidNumber = "frame:" + fid.expand(TFrameId::NO_PAD);
		return "$:" + toString(path) + fidNumber;
	}

	//All the other types whose icon is the same for file type, get the same id per type.
	else if (type == "tpl")
		return "$:tpl";
	else if (type == "tzp")
		return "$:tzp";
	else if (type == "svg")
		return "$:svg";
	else if (type == "tzu")
		return "$:tzu";
	else if (TFileType::getInfo(path) == TFileType::AUDIO_LEVEL)
		return "$:audio";
	else if (type == "scr")
		return "$:scr";
	else if (type == "mpath")
		return "$:mpath";
	else if (type == "curve")
		return "$:curve";
	else if (type == "cln")
		return "$:cln";
	else if (type == "tnzbat")
		return "$:tnzbat";
	else
		return "$:unknown";
}

//-----------------------------------------------------------------------------

TRaster32P IconGenerator::generateVectorFileIcon(
	const TFilePath &path,
	const TDimension &iconSize,
	const TFrameId &fid)
{
	TLevelReaderP lr(path);
	TLevelP level = lr->loadInfo();
	if (level->begin() == level->end())
		return TRaster32P();
	TFrameId frameId = fid;
	if (fid == TFrameId::NO_FRAME)
		frameId = level->begin()->first;
	TImageP img = lr->getFrameReader(frameId)->load();
	TVectorImageP vi = img;
	if (!vi)
		return TRaster32P();
	vi->setPalette(level->getPalette());
	VectorImageIconRenderer vir("", iconSize, vi.getPointer(), IconGenerator::Settings());
	return vir.generateRaster(iconSize);
}

//-----------------------------------------------------------------------------

TRaster32P IconGenerator::generateRasterFileIcon(
	const TFilePath &path,
	const TDimension &iconSize,
	const TFrameId &fid)
{
	TImageP img;

	try {
		// Attempt image reading
		TLevelReaderP lr(path);
		TLevelP level = lr->loadInfo();

		if (level->begin() == level->end())
			return TRaster32P();

		TFrameId frameId = fid;
		if (fid == TFrameId::NO_FRAME)		 // In case no frame was specified, pick the
			frameId = level->begin()->first; // first level frame

		TImageReaderP ir = lr->getFrameReader(frameId);

		if (const TImageInfo *ii = ir->getImageInfo()) {
			int shrinkX = ii->m_lx / iconSize.lx;
			int shrinkY = ii->m_ly / iconSize.ly;
			int shrink = shrinkX < shrinkY ? shrinkX : shrinkY;

			if (shrink > 1)
				ir->setShrink(shrink);
		}

		img = (toUpper(path.getType()) == "TLV") ? ir->loadIcon() : ir->load();
	} catch (...) {
	}

	// Extract a 32-bit fullcolor raster from img
	TRaster32P ras32;

	if (TRasterImageP ri = img) {
		ras32 = ri->getRaster();

		if (!ras32) {
			if (TRasterGR8P rasGR8 = ri->getRaster()) {
				TRaster32P raux(rasGR8->getSize());
				TRop::convert(raux, rasGR8);
				ras32 = raux;
			}
		}
	} else if (TToonzImageP ti = img) {
		TRasterCM32P auxRaster = ti->getRaster();
		TRaster32P dstRaster(auxRaster->getSize());

		if (TPaletteP plt = ti->getPalette())
			TRop::convert(dstRaster, auxRaster, plt, false);
		else
			dstRaster->fill(TPixel32::Magenta);

		ras32 = dstRaster;
	}

	if (!ras32)
		return TRaster32P();

	/*
    // NOTE: The following was possible with the old Qt version 4.3.3 - but in the new 4.5.0
    // it's not: 'It is not safe to use QPixmaps outside the GUI thread'...
    TRaster32P icon;
    {
      QPixmap p(rasterToQPixmap(ras32));
      icon = rasterFromQPixmap(
        scalePixmapKeepingAspectRatio(p, QSize(iconSize.lx, iconSize.ly), Qt::transparent)
        , false);
    }
  */

	TRaster32P icon(iconSize);

	double sx = double(iconSize.lx) / ras32->getLx();
	double sy = double(iconSize.ly) / ras32->getLy();
	double sc = tmin(sx, sy); // show all the image, possibly adding bands

	TAffine aff = TScale(sc).place(ras32->getCenterD(), icon->getCenterD());

	icon->fill(TPixel32(160, 160, 160)); // "bands" color
	TRop::resample(icon, ras32, aff, TRop::Triangle);

	if (icon) {
		if (::isUnpremultiplied(icon)) // APPALLING. I'm not touching this, but
			TRop::premultiply(icon);   // YOU JUST CAN'T TELL IF AN IMAGE IS PREMULTIPLIED
									   // OR NOT BY SCANNING ITS PIXELS.
									   // You either know it FOR A GIVEN, or you don't...      >_<
		TRectI srcBBoxI = ras32->getBounds();
		TRectD srcBBoxD = aff * TRectD(srcBBoxI.x0, srcBBoxI.y0,
									   srcBBoxI.x1 + 1, srcBBoxI.y1 + 1);

		TRect bbox = TRect(tfloor(srcBBoxD.x0), tceil(srcBBoxD.y0) - 1,
						   tfloor(srcBBoxD.x1), tceil(srcBBoxD.y1) - 1);

		bbox = (bbox * icon->getBounds()).enlarge(-1); // Add a 1 pixel transparent margin - this
		if (bbox.getLx() > 0 && bbox.getLy() > 0)	  // way the actual content doesn't look trimmed.
			::makeChessBackground(icon->extract(bbox));
	} else
		icon->fill(TPixel32(255, 0, 0));

	return icon;
}

//-----------------------------------------------------------------------------

TRaster32P IconGenerator::generateSplineFileIcon(const TFilePath &path, const TDimension &iconSize)
{
	TStageObjectSpline *spline = new TStageObjectSpline();
	TIStream is(path);
	spline->loadData(is);
	SplineIconRenderer sr("", iconSize, spline);
	TRaster32P icon = sr.generateRaster(iconSize);
	delete spline;
	return icon;
}

//-----------------------------------------------------------------------------

TRaster32P IconGenerator::generateMeshFileIcon(const TFilePath &path, const TDimension &iconSize, const TFrameId &fid)
{
	TLevelReaderP lr(path);
	TLevelP level = lr->loadInfo();
	if (level->begin() == level->end())
		return TRaster32P();

	TFrameId frameId = fid;
	if (fid == TFrameId::NO_FRAME)
		frameId = level->begin()->first;

	TMeshImageP mi = lr->getFrameReader(frameId)->load();
	if (!mi)
		return TRaster32P();

	MeshImageIconRenderer mir("", iconSize, mi.getPointer(), IconGenerator::Settings());
	return mir.generateRaster(iconSize);
}

//-----------------------------------------------------------------------------

TRaster32P IconGenerator::generateSceneFileIcon(
	const TFilePath &path,
	const TDimension &iconSize,
	int row)
{
	if (row == 0 || row == TFrameId::NO_FRAME - 1) {
		TFilePath iconPath = path.getParentDir() + "sceneIcons" + (path.getWideName() + L" .png");
		return generateRasterFileIcon(iconPath, iconSize, TFrameId::NO_FRAME);
	} else {
		//obsolete
		ToonzScene scene;
		scene.load(path);
		XsheetIconRenderer ir("", iconSize, scene.getXsheet(), row);
		return ir.generateRaster(iconSize);
	}
}

//-----------------------------------------------------------------------------

void FileIconRenderer::run()
{
	TDimension iconSize(getIconSize());

	try {
		TRaster32P iconRaster;
		std::string type(m_path.getType());

		if (type == "tnz" || type == "tab")
			iconRaster = IconGenerator::generateSceneFileIcon(m_path, iconSize, m_fid.getNumber() - 1);
		else if (type == "pli")
			iconRaster = IconGenerator::generateVectorFileIcon(m_path, iconSize, m_fid);
		else if (type == "tpl") {
			QImage palette(":Resources/paletteicon.png");
			setIcon(rasterFromQImage(palette));
			return;
		} else if (type == "tzp") {
			QImage palette(":Resources/tzpicon.png");
			setIcon(rasterFromQImage(palette));
			return;
		} else if (type == "svg") {
			QImage palette(":Resources/svg.png");
			setIcon(rasterFromQImage(palette));
			return;
		} else if (type == "tzu") {
			QImage palette(":Resources/tzuicon.png");
			setIcon(rasterFromQImage(palette));
			return;
		} else if (TFileType::getInfo(m_path) == TFileType::AUDIO_LEVEL) {
			QImage loudspeaker(":Resources/audio.png");
			setIcon(rasterFromQImage(loudspeaker));
			return;
		} else if (type == "scr") {
			QImage screensaver(":Resources/savescreen.png");
			setIcon(rasterFromQImage(screensaver));
			return;
		} else if (type == "psd") {
			QImage psdPath(":Resources/psd.png");
			setIcon(rasterFromQImage(psdPath));
			return;
		} else if (type == "mesh")
			iconRaster = IconGenerator::generateMeshFileIcon(m_path, iconSize, m_fid);
		else if (TFileType::isViewable(TFileType::getInfo(m_path)) || type == "tlv")
			iconRaster = IconGenerator::generateRasterFileIcon(m_path, iconSize, m_fid);
		else if (type == "mpath") {
			QImage motionPath(":Resources/motionpath.png");
			setIcon(rasterFromQImage(motionPath));
			return;
		} else if (type == "curve") {
			QImage motionPath(":Resources/curve.png");
			setIcon(rasterFromQImage(motionPath));
			return;
		} else if (type == "cln") {
			QImage motionPath(":Resources/cleanup.png");
			setIcon(rasterFromQImage(motionPath));
			return;
		} else if (type == "tnzbat") {
			QImage motionPath(":Resources/tasklist.png");
			setIcon(rasterFromQImage(motionPath));
			return;
		} else if (type == "tls") {
			QImage magpie(":Resources/magpie.png");
			setIcon(rasterFromQImage(magpie));
			return;
		} else if (type == "js") {
			QImage script(":Resources/scripticon.png");
			setIcon(rasterFromQImage(script));
			return;
		}

		else {
			QImage unknown(":Resources/unknown.png");
			setIcon(rasterFromQImage(unknown));
			return;
		}
		if (!iconRaster) {
			QImage broken(":Resources/broken.png");
			setIcon(rasterFromQImage(broken));
			return;
		}
		setIcon(iconRaster);
	} catch (const TImageVersionException &) {
		QImage unknown(":Resources/unknown.png");
		setIcon(rasterFromQImage(unknown));
	} catch (...) {
		QImage broken(":Resources/broken.png");
		setIcon(rasterFromQImage(broken));
	}
}

//=============================================================================

//================================
//    SceneIconRenderer class
//--------------------------------

class SceneIconRenderer : public IconRenderer
{
	ToonzScene *m_toonzScene;

public:
	SceneIconRenderer(const TDimension &iconSize, ToonzScene *scene)
		: IconRenderer(getId(), iconSize), m_toonzScene(scene) {}

	static std::string getId() { return "currentScene"; }

	void run();
	TRaster32P generateIcon(const TDimension &iconSize) const;
};

//-----------------------------------------------------------------------------

TRaster32P SceneIconRenderer::generateIcon(const TDimension &iconSize) const
{
	TRaster32P ras(iconSize);

	TPixel32 bgColor = m_toonzScene->getProperties()->getBgColor();
	bgColor.m = 255;
	ras->fill(bgColor);

	m_toonzScene->renderFrame(ras, 0, 0, false);

	return ras;
}

//-----------------------------------------------------------------------------

void SceneIconRenderer::run()
{
	setIcon(generateIcon(getIconSize()));
}

//=============================================================================

//===================================
//
//    IconGenerator class
//
//-----------------------------------

IconGenerator::IconGenerator() : m_iconSize(FilmstripIconSize)
{
	m_executor.setMaxActiveTasks(1); //Only one thread to render icons...
	m_executor.setDedicatedThreads(true);
}

//-----------------------------------------------------------------------------

IconGenerator::~IconGenerator()
{
}

//-----------------------------------------------------------------------------

IconGenerator *IconGenerator::instance()
{
	static IconGenerator _instance;
	return &_instance;
}

//-----------------------------------------------------------------------------

void IconGenerator::setFilmstripIconSize(const TDimension &dim)
{
	FilmstripIconSize = dim;
}

//-----------------------------------------------------------------------------

TDimension IconGenerator::getIconSize() const
{
	return FilmstripIconSize;
}

//-----------------------------------------------------------------------------

TOfflineGL *IconGenerator::getOfflineGLContext()
{
	//One context per rendering thread
	if (!m_contexts.hasLocalData()) {
		TDimension contextSize(tmax(FilmstripIconSize.lx, IconSize.lx), tmax(FilmstripIconSize.ly, IconSize.ly));
		m_contexts.setLocalData(new TOfflineGL(contextSize));
	}
	return m_contexts.localData();
}

//-----------------------------------------------------------------------------

void IconGenerator::addTask(const std::string &id, TThread::RunnableP iconRenderer)
{
	iconsMap.insert(id);
	m_executor.addTask(iconRenderer);
}

//-----------------------------------------------------------------------------

QPixmap IconGenerator::getIcon(TXshLevel *xl, const TFrameId &fid, bool filmStrip, bool onDemand)
{
	if (!xl)
		return QPixmap();

	if (TXshChildLevel *cl = xl->getChildLevel()) {
		if (filmStrip)
			return QPixmap();

		std::string id = XsheetIconRenderer::getId(cl, fid.getNumber() - 1);
		QPixmap pix;
		if (::getIcon(id, pix))
			return pix;

		if (onDemand)
			return pix;

		TDimension iconSize = TDimension(80, 60);

		//The icon must be calculated - add an IconRenderer task.
		//storeIcon(id, QPixmap());   //It was automatically added by the former access
		addTask(id, new XsheetIconRenderer(id, iconSize, cl->getXsheet()));
	}

	if (TXshSimpleLevel *sl = xl->getSimpleLevel()) {
		// make thumbnails for cleanup preview and cameratest to be the same as normal TLV
		std::string id;
		int status = sl->getFrameStatus(fid);
		if (sl->getType() == TZP_XSHLEVEL &&
			status & TXshSimpleLevel::CleanupPreview) {
			sl->setFrameStatus(fid, status & ~TXshSimpleLevel::CleanupPreview);
			id = sl->getIconId(fid);
			sl->setFrameStatus(fid, status);
		} else
			id = sl->getIconId(fid);

		if (!filmStrip)
			id += "_small";

		QPixmap pix;
		if (::getIcon(id, pix, xl->getSimpleLevel()))
			return pix;

		if (onDemand)
			return pix;

		IconGenerator::Settings oldSettings = m_settings;

		// Disable transparency check for cast and xsheet icons
		if (!filmStrip)
			m_settings = IconGenerator::Settings();

		TDimension iconSize = filmStrip ? m_iconSize : TDimension(80, 60);

		//storeIcon(id, QPixmap());

		int type = sl->getType();
		switch (type) {
		case OVL_XSHLEVEL:
		case TZI_XSHLEVEL:
			addTask(id, new RasterImageIconRenderer(id, iconSize, sl, fid));

			CASE PLI_XSHLEVEL : addTask(id, new VectorImageIconRenderer(id, iconSize, sl, fid, m_settings));

			CASE TZP_XSHLEVEL:
			{
				// Yep, we could have rasters, due to a cleanupping process
				if (status == TXshSimpleLevel::Scanned)
					addTask(id, new RasterImageIconRenderer(id, iconSize, sl, fid));
				else
					addTask(id, new ToonzImageIconRenderer(id, iconSize, sl, fid, m_settings));
			}

			CASE MESH_XSHLEVEL : addTask(id, new MeshImageIconRenderer(id, iconSize, sl, fid, m_settings));

		DEFAULT:
			assert(false);
		}

		m_settings = oldSettings;
	}

	return QPixmap();
}

//-----------------------------------------------------------------------------

void IconGenerator::invalidate(TXshLevel *xl, const TFrameId &fid, bool onlyFilmStrip)
{
	if (!xl)
		return;

	if (TXshSimpleLevel *sl = xl->getSimpleLevel()) {
		std::string id = sl->getIconId(fid);

		int type = sl->getType();

		switch (type) {
		case OVL_XSHLEVEL:
		case TZI_XSHLEVEL:
			addTask(id, new RasterImageIconRenderer(id, getIconSize(), sl, fid));

			CASE PLI_XSHLEVEL : removeIcon(id);
			addTask(id, new VectorImageIconRenderer(id, getIconSize(), sl, fid, m_settings));

			CASE TZP_XSHLEVEL:
			{
				int status = sl->getFrameStatus(fid);
				if (status == TXshSimpleLevel::Scanned)
					addTask(id, new RasterImageIconRenderer(id, getIconSize(), sl, fid));
				else
					addTask(id, new ToonzImageIconRenderer(id, getIconSize(), sl, fid, m_settings));
			}

			CASE MESH_XSHLEVEL : addTask(id, new MeshImageIconRenderer(id, getIconSize(), sl, fid, m_settings));

		DEFAULT:
			assert(false);
		}

		if (onlyFilmStrip)
			return;

		id += "_small";
		if (iconsMap.find(id) == iconsMap.end())
			return;

		//Not-filmstrip icons diable all checks
		IconGenerator::Settings oldSettings = m_settings;
		m_settings.m_transparencyCheck = false;
		m_settings.m_inkIndex = -1;
		m_settings.m_paintIndex = -1;
		m_settings.m_blackBgCheck = false;

		switch (type) {
		case OVL_XSHLEVEL:
		case TZI_XSHLEVEL:
			addTask(id, new RasterImageIconRenderer(id, TDimension(80, 60), sl, fid));

			CASE PLI_XSHLEVEL : addTask(id, new VectorImageIconRenderer(id, TDimension(80, 60), sl, fid, m_settings));

			CASE TZP_XSHLEVEL:
			{
				int status = sl->getFrameStatus(fid);
				if (status == TXshSimpleLevel::Scanned)
					addTask(id, new RasterImageIconRenderer(id, TDimension(80, 60), sl, fid));
				else
					addTask(id, new ToonzImageIconRenderer(id, TDimension(80, 60), sl, fid, m_settings));
			}

			CASE MESH_XSHLEVEL : addTask(id, new MeshImageIconRenderer(id, TDimension(80, 60), sl, fid, m_settings));

		DEFAULT:
			assert(false);
		}

		m_settings = oldSettings;
	} else if (TXshChildLevel *cl = xl->getChildLevel()) {
		if (onlyFilmStrip)
			return;

		std::string id = XsheetIconRenderer::getId(cl, fid.getNumber() - 1);
		removeIcon(id);

		getIcon(xl, fid);
	}
}

//-----------------------------------------------------------------------------

void IconGenerator::remove(TXshLevel *xl, const TFrameId &fid, bool onlyFilmStrip)
{
	if (!xl)
		return;
	if (TXshSimpleLevel *sl = xl->getSimpleLevel()) {
		std::string id(sl->getIconId(fid));

		removeIcon(id);
		if (!onlyFilmStrip)
			removeIcon(id + "_small");
	} else {
		TXshChildLevel *cl = xl->getChildLevel();
		if (cl && !onlyFilmStrip)
			removeIcon(XsheetIconRenderer::getId(cl, fid.getNumber() - 1));
	}
}

//-----------------------------------------------------------------------------

QPixmap IconGenerator::getIcon(TStageObjectSpline *spline)
{
	if (!spline)
		return QPixmap();
	string iconName = spline->getIconId();

	QPixmap pix;
	if (::getIcon(iconName, pix))
		return pix;

	//storeIcon(id, QPixmap());
	addTask(iconName, new SplineIconRenderer(iconName, getIconSize(), spline));

	return QPixmap();
}

//-----------------------------------------------------------------------------

void IconGenerator::invalidate(TStageObjectSpline *spline)
{
	if (!spline)
		return;
	string iconName = spline->getIconId();
	removeIcon(iconName);

	addTask(iconName, new SplineIconRenderer(iconName, getIconSize(), spline));
}

//-----------------------------------------------------------------------------

void IconGenerator::remove(TStageObjectSpline *spline)
{
	if (!spline)
		return;
	string iconName = spline->getIconId();
	removeIcon(iconName);
}

//-----------------------------------------------------------------------------

QPixmap IconGenerator::getIcon(const TFilePath &path, const TFrameId &fid)
{
	std::string id = FileIconRenderer::getId(path, fid);

	QPixmap pix;
	if (::getIcon(id, pix))
		return pix;

	addTask(id, new FileIconRenderer(TDimension(80, 60), path, fid));

	return QPixmap();
}

//-----------------------------------------------------------------------------

void IconGenerator::invalidate(const TFilePath &path, const TFrameId &fid)
{
	std::string id = FileIconRenderer::getId(path, fid);
	removeIcon(id);
	addTask(id, new FileIconRenderer(TDimension(80, 60), path, fid));
}

//-----------------------------------------------------------------------------

void IconGenerator::remove(const TFilePath &path, const TFrameId &fid)
{
	removeIcon(FileIconRenderer::getId(path, fid));
}

//-----------------------------------------------------------------------------

QPixmap IconGenerator::getSceneIcon(ToonzScene *scene)
{
	std::string id(SceneIconRenderer::getId());

	QPixmap pix;
	if (::getIcon(id, pix))
		return pix;

	//storeIcon(id, QPixmap());
	addTask(id, new SceneIconRenderer(getIconSize(), scene));

	return QPixmap();
}

//-----------------------------------------------------------------------------

void IconGenerator::invalidateSceneIcon()
{
	removeIcon(SceneIconRenderer::getId());
}

//-----------------------------------------------------------------------------

void IconGenerator::remap(const string &newIconId, const string &oldIconId)
{
	IconIterator it = iconsMap.find(oldIconId);
	if (it == iconsMap.end())
		return;

	iconsMap.erase(it);
	iconsMap.insert(newIconId);

	TImageCache::instance()->remap(newIconId, oldIconId);
}

//-----------------------------------------------------------------------------

void IconGenerator::clearRequests()
{
	m_executor.cancelAll();
}

//-----------------------------------------------------------------------------

void IconGenerator::clearSceneIcons()
{
	//Eliminate all icons whose prefix is not "$:" (that is, scene-independent images).
	//The abovementioned prefix is internally recognized by the image cache when the scene
	//changes to avoid clearing file browser's icons.

	//Observe that image cache's clear function invoked during scene changes is called through
	//the ImageManager::clear() method, including FilmStrip icons.

	//note the ';' - which follows ':' in the ascii table
	iconsMap.erase(iconsMap.begin(), iconsMap.lower_bound("$:"));
	iconsMap.erase(iconsMap.lower_bound("$;"), iconsMap.end());
}

//-----------------------------------------------------------------------------

void IconGenerator::onStarted(TThread::RunnableP iconRenderer)
{
	IconRenderer *ir = static_cast<IconRenderer *>(iconRenderer.getPointer());

	ir->hasStarted() = true;
}

//-----------------------------------------------------------------------------

void IconGenerator::onCanceled(TThread::RunnableP iconRenderer)
{
	IconRenderer *ir = static_cast<IconRenderer *>(iconRenderer.getPointer());

	if (!ir->hasStarted()) {
		removeIcon(ir->getId());
	}
}

//-----------------------------------------------------------------------------

void IconGenerator::onFinished(TThread::RunnableP iconRenderer)
{
	IconRenderer *ir = static_cast<IconRenderer *>(iconRenderer.getPointer());

	// if the icon was generated in TToonzImage format, cache it instead
	ToonzImageIconRenderer *tir = dynamic_cast<ToonzImageIconRenderer *>(ir);
	if (tir) {
		TRasterCM32P timgp = tir->getIcon_TnzImg();
		if (timgp) {
			::setIcon_TnzImg(ir->getId(), timgp);
			emit iconGenerated();
			if (ir->wasTerminated())
				m_iconsTerminationLoop.quit();
			return;
		}
	}

	//Update the icons map
	if (ir->getIcon()) {
		::setIcon(ir->getId(), ir->getIcon());
		emit iconGenerated();
	}

	if (ir->wasTerminated())
		m_iconsTerminationLoop.quit();
}

//-----------------------------------------------------------------------------

void IconGenerator::onException(TThread::RunnableP iconRenderer)
{
	IconRenderer *ir = static_cast<IconRenderer *>(iconRenderer.getPointer());

	if (ir->wasTerminated())
		m_iconsTerminationLoop.quit();
}

//-----------------------------------------------------------------------------

void IconGenerator::onTerminated(TThread::RunnableP iconRenderer)
{
	IconRenderer *ir = static_cast<IconRenderer *>(iconRenderer.getPointer());

	ir->wasTerminated() = true;
	m_iconsTerminationLoop.exec();
}