//------------------------------------------------------------
#include "tfxparam.h"
#include "stdfx.h"

#include "ino_common.h"
/* tnzbase --> Source Files --> tfx --> binaryFx.cppを参照 */
class ino_blend_screen : public TBlendForeBackRasterFx
{
	FX_PLUGIN_DECLARATION(ino_blend_screen)
	TRasterFxPort m_up;
	TRasterFxPort m_down;
	TDoubleParamP m_opacity;
	TBoolParamP m_clipping_mask;

public:
	ino_blend_screen()
		: m_opacity(1.0 * ino::param_range()), m_clipping_mask(true)
	{
		addInputPort("Fore", this->m_up);
		addInputPort("Back", this->m_down);
		bindParam(this, "opacity", this->m_opacity);
		bindParam(this, "clipping_mask", this->m_clipping_mask);
		this->m_opacity->setValueRange(0, 1.0 * ino::param_range());
	}
	~ino_blend_screen() {}
	bool canHandle(const TRenderSettings &rs, double frame)
	{
		return true;
	}
	bool doGetBBox(
		double frame, TRectD &bBox, const TRenderSettings &rs)
	{
		TRectD up_bx;
		const bool up_sw = (m_up.isConnected() ? m_up->doGetBBox(frame, up_bx, rs) : false);
		TRectD dn_bx;
		const bool dn_sw = (m_down.isConnected() ? m_down->doGetBBox(frame, dn_bx, rs) : false);
		if (up_sw && dn_sw) {
			bBox = up_bx + dn_bx;
			return !bBox.isEmpty();
		} else if (up_sw) {
			bBox = up_bx;
			return true;
		} else if (dn_sw) {
			bBox = dn_bx;
			return true;
		} else {
			bBox = TRectD();
			return false;
		}
	}
	//TRect getInvalidRect(const TRect &max) {return max;}
	//void doSetParam(const std::string &name, const TParamP &param) {}
	int getMemoryRequirement(
		const TRectD &rect, double frame, const TRenderSettings &rs)
	{
		return TRasterFx::memorySize(rect, rs.m_bpp);
	}

	void doDryCompute(
		TRectD &rect, double frame, const TRenderSettings &rs)
	{
		this->dryComputeUpAndDown(rect, frame, rs, false);
	}
	void doCompute(
		TTile &tile, double frame, const TRenderSettings &rs);
	void computeUpAndDown(
		TTile &tile, double frame, const TRenderSettings &rs, TRasterP &dn_ras, TRasterP &up_ras, bool upComputesWholeTile = false);
	void dryComputeUpAndDown(
		TRectD &rect, double frame, const TRenderSettings &rs, bool upComputesWholeTile = false
		/*
upComputesWholeTile は Screen, Min, Blendでtrueにして使用している。 
*/
		);
};
FX_PLUGIN_IDENTIFIER(ino_blend_screen, "inoScreenFx");
//------------------------------------------------------------
namespace
{
/* より大きな四角エリアにPixel整数値で密着する */
void makeRectCoherent(TRectD &rect, const TPointD &pos)
{
	rect -= pos;
	rect.x0 = tfloor(rect.x0); /* ((x)<(int)(x)? (int)(x)-1: (int)(x))*/
	rect.y0 = tfloor(rect.y0);
	rect.x1 = tceil(rect.x1); /* ((int)(x)<(x)? (int)(x)+1: (int)(x))*/
	rect.y1 = tceil(rect.y1);
	rect += pos;
}
}
void ino_blend_screen::computeUpAndDown(
	TTile &tile, double frame, const TRenderSettings &rs, TRasterP &dn_ras, TRasterP &up_ras, bool upComputesWholeTile)
{
	/* ------ サポートしていないPixelタイプはエラーを投げる --- */
	if (!((TRaster32P)tile.getRaster()) &&
		!((TRaster64P)tile.getRaster())) {
		throw TRopException("unsupported input pixel type");
	}
	/*
m_down,m_upは繋がっている方があればそれを表示する
両方とも接続していれば合成処理する
表示スイッチを切ってあるならm_upを表示する
fxをreplaceすると、
	m_source   --> m_up  (=port0)
	m_refernce --> m_down(=port1)
となる
*/
	const bool up_is = (this->m_up.isConnected() &&
						this->m_up.getFx()->getTimeRegion().contains(frame));
	const bool down_is = (this->m_down.isConnected() &&
						  this->m_down.getFx()->getTimeRegion().contains(frame));
	/* ------ 両方とも切断の時処理しない ---------------------- */
	if (!up_is && !down_is) {
		tile.getRaster()->clear();
		return;
	}
	/* ------ up接続かつdown切断の時 -------------------------- */
	if (up_is && !down_is) {
		this->m_up->compute(tile, frame, rs);
		return;
	}
	/* ------ down接続時 downのみ描画して... ------------------ */
	if (down_is) {
		this->m_down->compute(tile, frame, rs);
	}
	/* ------ up切断時 ---------------------------------------- */
	if (!up_is) {
		return;
	}

	/* upと重なる部分を描画する */

	/* ------ tileの範囲 -------------------------------------- */
	const TDimension tsz(tile.getRaster()->getSize()); /* 整数 */
	const TRectD tileRect(tile.m_pos, TDimensionD(tsz.lx, tsz.ly));
	TRectD upBBox;
	if (upComputesWholeTile) {
		upBBox = tileRect;
	}	  /* tile全体を得る */
	else { /* 厳密なエリア... */
		this->m_up->getBBox(frame, upBBox, rs);
		upBBox *= tileRect; /* upとtileの交差エリア */

		/* より大きな四角エリアにPixel整数値で密着する */
		makeRectCoherent(upBBox, tile.m_pos); // double-->int grid
	}

	TDimensionI upSize(						  /* TRectDをTDimensionIに変換 */
					   tround(upBBox.getLx()) // getLx() = "x1>=x0?x1-x0:0"
					   ,
					   tround(upBBox.getLy()) // getLy() = "y1>=y0?y1-y0:0"
					   );
	if ((upSize.lx <= 0) || (upSize.ly <= 0)) {
		return;
	}

	/* ------ upのメモリ確保と描画 ---------------------------- */
	TTile upTile;
	this->m_up->allocateAndCompute(
		upTile, upBBox.getP00(), upSize, tile.getRaster() /* 32/64bitsの判定に使う */
		,
		frame, rs);
	/* ------ upとdownのTRasterを得る ------------------------- */
	TRectI dnRect(upTile.getRaster()->getSize()); //TDimensionI(-)

	dnRect += convert(upTile.m_pos - tile.m_pos); /* uptile->tile原点 */
	/*
	ここで問題はdoubleの位置を、四捨五入して整数値にしていること
	移動してから四捨五入ではないの???
	dnRectの元位置が整数位置なので、問題ないか...
	*/

	dn_ras = upComputesWholeTile ? tile.getRaster() : tile.getRaster()->extract(dnRect);
	up_ras = upTile.getRaster();
	assert(dn_ras->getSize() == up_ras->getSize());
}
void ino_blend_screen::dryComputeUpAndDown(
	TRectD &rect, double frame, const TRenderSettings &rs, bool upComputesWholeTile)
{
	const bool up_is = (this->m_up.isConnected() &&
						this->m_up.getFx()->getTimeRegion().contains(frame));
	const bool down_is = (this->m_down.isConnected() &&
						  this->m_down.getFx()->getTimeRegion().contains(frame));
	/* ------ 両方とも切断の時処理しない ---------------------- */
	if (!up_is && !down_is) {
		return;
	}
	/* ------ up接続かつdown切断の時 -------------------------- */
	if (up_is && !down_is) {
		this->m_up->dryCompute(rect, frame, rs);
		return;
	}
	/* ------ down接続時 -------------------------------------- */
	if (down_is) {
		this->m_down->dryCompute(rect, frame, rs);
	}
	/* ------ up切断時 ---------------------------------------- */
	if (!up_is) {
		return;
	}

	/* ------ tileのgeometryを計算する ------------------------ */
	TRectD upBBox;

	if (upComputesWholeTile) {
		upBBox = rect;
	} else {
		this->m_up->getBBox(frame, upBBox, rs);
		upBBox *= rect;
		makeRectCoherent(upBBox, rect.getP00());
	}
	if ((upBBox.getLx() > 0.5) && (upBBox.getLy() > 0.5)) {
		this->m_up->dryCompute(upBBox, frame, rs);
	}
}
//------------------------------------------------------------
#include <sstream> /* std::ostringstream */
#include "igs_color_blend.h"
namespace
{
template <class T, class Q>
void tmpl_(
	TRasterPT<T> dn_ras_out, const TRasterPT<T> &up_ras, const double up_opacity, const bool clipping_mask_sw)
{
	double maxi = static_cast<double>(T::maxChannelValue); //255or65535

	assert(dn_ras_out->getSize() == up_ras->getSize());

	for (int yy = 0; yy < dn_ras_out->getLy(); ++yy) {
		T *out_pix = dn_ras_out->pixels(yy);
		const T *const out_end = out_pix + dn_ras_out->getLx();
		const T *up_pix = up_ras->pixels(yy);
		for (; out_pix < out_end; ++out_pix, ++up_pix) {
			double upr = static_cast<double>(up_pix->r) / maxi;
			double upg = static_cast<double>(up_pix->g) / maxi;
			double upb = static_cast<double>(up_pix->b) / maxi;
			double upa = static_cast<double>(up_pix->m) / maxi;
			double dnr = static_cast<double>(out_pix->r) / maxi;
			double dng = static_cast<double>(out_pix->g) / maxi;
			double dnb = static_cast<double>(out_pix->b) / maxi;
			double dna = static_cast<double>(out_pix->m) / maxi;
			igs::color::screen(
				dnr, dng, dnb, dna, upr, upg, upb, upa, clipping_mask_sw ? up_opacity * dna : up_opacity);
			out_pix->r = static_cast<Q>(dnr * (maxi + 0.999999));
			out_pix->g = static_cast<Q>(dng * (maxi + 0.999999));
			out_pix->b = static_cast<Q>(dnb * (maxi + 0.999999));
			out_pix->m = static_cast<Q>(dna * (maxi + 0.999999));
		}
	}
}
void fx_(
	TRasterP &dn_ras_out, const TRasterP &up_ras, const TPoint &pos, const double up_opacity, const bool clipping_mask_sw)
{
	/* 交差したエリアを処理するようにする、いるのか??? */
	TRect outRect(dn_ras_out->getBounds());
	TRect upRect(up_ras->getBounds() + pos);
	TRect intersection = outRect * upRect;
	if (intersection.isEmpty())
		return;

	TRasterP cRout = dn_ras_out->extract(intersection);
	TRect rr = intersection - pos;
	TRasterP cRup = up_ras->extract(rr);

	TRaster32P rout32 = cRout, rup32 = cRup;
	TRaster64P rout64 = cRout, rup64 = cRup;

	if (rout32 && rup32) {
		tmpl_<TPixel32, UCHAR>(
			rout32, rup32, up_opacity, clipping_mask_sw);
	} else if (rout64 && rup64) {
		tmpl_<TPixel64, USHORT>(
			rout64, rup64, up_opacity, clipping_mask_sw);
	} else {
		throw TRopException("unsupported pixel type");
	}
}
}
void ino_blend_screen::doCompute(
	TTile &tile, double frame, const TRenderSettings &rs)
{
	/* ------ 画像生成 ---------------------------------------- */
	TRasterP dn_ras, up_ras;
	this->computeUpAndDown(tile, frame, rs, dn_ras, up_ras);
	if (!dn_ras || !up_ras) {
		return;
	}
	/* ------ 動作パラメータを得る ---------------------------- */
	const double up_opacity = this->m_opacity->getValue(frame) / ino::param_range();
	/* ------ (app_begin)log記憶 ------------------------------ */
	const bool log_sw = ino::log_enable_sw();

	if (log_sw) {
		std::ostringstream os;
		os << "params"
		   << "  up_opacity " << up_opacity
		   << "   dn_tile w " << dn_ras->getLx()
		   << "  wrap " << dn_ras->getWrap()
		   << "  h " << dn_ras->getLy()
		   << "  pixbits " << ino::pixel_bits(dn_ras)
		   << "   up_tile w " << up_ras->getLx()
		   << "  wrap " << up_ras->getWrap()
		   << "  h " << up_ras->getLy()
		   << "  pixbits " << ino::pixel_bits(up_ras)
		   << "   frame " << frame;
	}
	/* ------ fx処理 ------------------------------------------ */
	try {
		if (dn_ras) {
			dn_ras->lock();
		}
		if (up_ras) {
			up_ras->lock();
		}
		fx_(dn_ras, up_ras, TPoint(), up_opacity, this->m_clipping_mask->getValue());
		if (up_ras) {
			up_ras->unlock();
		}
		if (dn_ras) {
			dn_ras->unlock();
		}
	}
	/* ------ error処理 --------------------------------------- */
	catch (std::exception &e) {
		if (up_ras) {
			up_ras->unlock();
		}
		if (dn_ras) {
			dn_ras->unlock();
		}
		if (log_sw) {
			std::string str("exception <");
			str += e.what();
			str += '>';
		}
		throw;
	} catch (...) {
		if (up_ras) {
			up_ras->unlock();
		}
		if (dn_ras) {
			dn_ras->unlock();
		}
		if (log_sw) {
			std::string str("other exception");
		}
		throw;
	}
}