#include "tregionprop.h"

#include "tstroke.h"

#include "tregion.h"

//#include "tcurves.h"

//#include "tgl.h"

//#include "tcolorfunctions.h"

#include "tmathutil.h"

#include "drawutil.h"

#include "tvectorrenderdata.h"

//#include "tcolorstyles.h"

#include "tsimplecolorstyles.h"

//#include "tcurveutil.h"

//#include "tdebugmessage.h"

//#include "tflash.h"

#ifndef _WIN32

#define CALLBACK

#endif

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

TRegionProp::TRegionProp(const TRegion *region)

	: m_region(region), m_regionChanged(true)

{

}

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

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

namespace

{

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

bool computeOutline(const TRegion *region,

					TRegionOutline::PointVector &polyline,

					const double pixelSize)

{

	bool doAntialiasing = false;

	polyline.clear();

	std::vector<tpointd> polyline2d;</tpointd>

	std::vector<int> indices;</int>

	int i, edgeSize = region->getEdgeCount(), oldSize = 0;

	for (i = 0; i < edgeSize; i++) {

		TEdge &edge = *region->getEdge(i);

		if (edge.m_index >= 0 && edge.m_s) {

			bool outline = (edge.m_s->getAverageThickness() == 0.0);

			if (outline && !doAntialiasing) {

				//The region must be antialiased if it has at least one invisible (0-thin) edge

				doAntialiasing = true;

				//Plus, edges will have to be reproduced independently from the edge side

				indices.reserve(edgeSize);

			}

			if (outline && (edge.m_w0 > edge.m_w1)) {

				int newSize = polyline2d.size();

				if (oldSize < newSize) {

					//There is a sequence of forward vertices

					indices.push_back(newSize - oldSize);

					oldSize = newSize;

				}

				stroke2polyline(polyline2d, *edge.m_s, pixelSize, edge.m_w1, edge.m_w0, true);

				//Insert the sequence of backward vertices

				newSize = polyline2d.size();

				indices.push_back(oldSize - newSize);

				oldSize = newSize;

			} else

				stroke2polyline(polyline2d, *edge.m_s, pixelSize, edge.m_w0, edge.m_w1);

		}

	}

	//Copy points to the output

	int pointNumber = polyline2d.size();

	polyline.reserve(pointNumber);

	int j, k, l, indicesCount = indices.size();

	for (i = 0, k = 0; k < indicesCount; ++k) {

		l = indices[k];

		if (l == 0)

			continue;

		if (l > 0) {

			l = i + l;

			for (j = i; j < l; ++j)

				polyline.push_back(T3DPointD(polyline2d[j], 0.0));

			i = l;

		} else {

			l = i - l;

			j = l - 1;

			//Inverted sequences are symmetric by construction.

			//If necessary, chop the last element.

			if (polyline2d[i] == polyline2d[j])

				++i;

			for (; j >= i; --j)

				polyline.push_back(T3DPointD(polyline2d[j], 0.0));

			i = l;

		}

	}

	//Finally, copy the remaining (forward) ones

	for (; i < pointNumber; ++i)

		polyline.push_back(T3DPointD(polyline2d[i], 0.0));

	return doAntialiasing;

}

/*!

 This function accept a polygon which can have autointersections, 

 and creates a number of not-autointersecting polygons. the second function is for recursive calls.

 It is used for The GlTessellator

*/

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

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

} //end namaspace

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

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

void OutlineRegionProp::computeRegionOutline()

{

	int subRegionNumber = getRegion()->getSubregionCount();

	TRegionOutline::PointVector app;

	m_outline.m_exterior.clear();

	computeOutline(getRegion(), app, m_pixelSize);

	m_outline.m_doAntialiasing = true;

	m_outline.m_exterior.push_back(app);

	m_outline.m_interior.clear();

	m_outline.m_interior.reserve(subRegionNumber);

	for (int i = 0; i < subRegionNumber; i++) {

		app.clear();

		computeOutline(getRegion()->getSubregion(i), app, m_pixelSize);

		m_outline.m_doAntialiasing = true;

		m_outline.m_interior.push_back(app);

	}

	m_outline.m_bbox = getRegion()->getBBox();

}

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

OutlineRegionProp::OutlineRegionProp(const TRegion *region, const TOutlineStyleP colorStyle)

	: TRegionProp(region), m_pixelSize(0), m_colorStyle(colorStyle)

{

	m_styleVersionNumber = m_colorStyle->getVersionNumber();

}

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

void OutlineRegionProp::draw(const TVectorRenderData &rd)

{

	if (rd.m_clippingRect != TRect() && !rd.m_is3dView && !(rd.m_aff * getRegion()->getBBox()).overlaps(convert(rd.m_clippingRect)))

		return;

	glPushMatrix();

	tglMultMatrix(rd.m_aff);

	double pixelSize = sqrt(tglGetPixelSize2());

	if (!isAlmostZero(pixelSize - m_pixelSize, 1e-5) ||

		m_regionChanged ||

		m_styleVersionNumber != m_colorStyle->getVersionNumber()) {

		m_pixelSize = pixelSize;

		m_regionChanged = false;

		computeRegionOutline();

		TOutlineStyle::RegionOutlineModifier *modifier = m_colorStyle->getRegionOutlineModifier();

		if (modifier)

			modifier->modify(m_outline);

		m_styleVersionNumber = m_colorStyle->getVersionNumber();

	}

	assert(!m_outline.m_exterior.empty());

	m_colorStyle->drawRegion(rd.m_cf,

							 rd.m_antiAliasing && rd.m_regionAntialias,

							 m_outline);

	glPopMatrix();

}

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

TRegionProp *OutlineRegionProp::clone(const TRegion *region) const

{

	OutlineRegionProp *prop = new OutlineRegionProp(region, m_colorStyle);

	prop->m_regionChanged = m_regionChanged;

	prop->m_pixelSize = m_pixelSize;

	prop->m_outline = m_outline;

	return prop;

}

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

const TColorStyle *OutlineRegionProp::getColorStyle() const

{

	return m_colorStyle.getPointer();

}

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

void OutlineRegionProp::draw(TFlash &flash)

{

	m_colorStyle->drawRegion(flash, getRegion());

	/*

//flash.setColor(m_colorStyle->getMainColor());

m_colorStyle->setFill(flash);

//rd.setTexture(m_colorStyle->getMainColor());

for (i=0; i<(int)r->getEdgeCount(); i++)

	computeQuadChain(*r->getEdge(i), quadArray, toBeDeleted);

flash.drawPolygon(quadArray);

clearPointerContainer(toBeDeleted);

*/

}