/**
 * Copyright 2010 JogAmp Community. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 *
 *    1. Redistributions of source code must retain the above copyright notice, this list of
 *       conditions and the following disclaimer.
 *
 *    2. Redistributions in binary form must reproduce the above copyright notice, this list
 *       of conditions and the following disclaimer in the documentation and/or other materials
 *       provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * The views and conclusions contained in the software and documentation are those of the
 * authors and should not be interpreted as representing official policies, either expressed
 * or implied, of JogAmp Community.
 */
package jogamp.graph.curve.text;

import java.util.ArrayList;

import com.jogamp.graph.geom.Point;
import com.jogamp.graph.geom.PointTex;
import com.jogamp.graph.geom.Triangle;
import com.jogamp.graph.geom.opengl.Vertex;

import javax.media.opengl.GLContext;

import jogamp.graph.geom.plane.AffineTransform;
import jogamp.graph.geom.plane.Path2D;
import jogamp.graph.geom.plane.PathIterator;


import com.jogamp.graph.curve.Region;
import com.jogamp.graph.curve.RegionFactory;
import com.jogamp.opengl.util.PMVMatrix;
import com.jogamp.opengl.util.glsl.ShaderState;

public class GlyphString {
	private final Point.Factory<? extends PointTex> pointFactory;	
	private ArrayList<GlyphShape> glyphs = new ArrayList<GlyphShape>();
	private String str = "";
	private String fontname = "";
	private Region region;
	
	private Vertex origin = new Vertex();

	/** Create a new GlyphString object
	 * @param fontname the name of the font that this String is
	 * associated with
	 * @param str the string object
	 */
	public GlyphString(Point.Factory<? extends PointTex> factory, String fontname, String str){
		pointFactory = factory;
		this.fontname = fontname;
		this.str = str;
	}
	
	public final Point.Factory<? extends PointTex> pointFactory() { return pointFactory; }
	
	public void addGlyphShape(GlyphShape glyph){
		glyphs.add(glyph);
	}
	public String getString(){
		return str;
	}

	/** Creates the Curve based Glyphs from a Font 
	 * @param paths a list of FontPath2D objects that define the outline
	 * @param affineTransform a global affine transformation applied to the paths.
	 */
	public void createfromFontPath(Path2D[] paths, AffineTransform affineTransform){
		final int numGlyps = paths.length;
		for (int index=0;index<numGlyps;index++){
			if(paths[index] == null){
				continue;
			}
			PathIterator iterator = paths[index].iterator(affineTransform);
			GlyphShape glyphShape = new GlyphShape(pointFactory, iterator);
			
			if(glyphShape.getNumVertices() < 3) {
				continue;
			}			
			addGlyphShape(glyphShape);
		}
	}
	
	private ArrayList<Triangle<PointTex>> initializeTriangles(float sharpness){
		ArrayList<Triangle<PointTex>> triangles = new ArrayList<Triangle<PointTex>>();
		for(GlyphShape glyph:glyphs){
			ArrayList<Triangle<PointTex>> tris = glyph.triangulate(sharpness);
			triangles.addAll(tris);
		}
		return triangles;
	}
	
	/** Generate a OGL Region to represent this Object.
	 * @param context the GLContext which the region is defined by.
	 * @param shaprness the curvature sharpness of the object.
	 * @param st shader state
	 */
	public void generateRegion(GLContext context, float shaprness, ShaderState st, int type){
		region = RegionFactory.create(context, st, type);
		region.setFlipped(true);
		
		ArrayList<Triangle<PointTex>> tris = initializeTriangles(shaprness);
		region.addTriangles(tris);
		
		int numVertices = region.getNumVertices();
		for(GlyphShape glyph:glyphs){
			ArrayList<PointTex> gVertices = glyph.getVertices();
			for(PointTex vert:gVertices){
				vert.setId(numVertices++);
			}
			region.addVertices(gVertices);
		}
		
		/** initialize the region */
		region.update();
	}
	
	/** Generate a Hashcode for this object 
	 * @return a string defining the hashcode
	 */
	public String getTextHashCode(){
		return "" + fontname.hashCode() + str.hashCode();
	}

	/** Render the Object based using the associated Region
	 *  previously generated.
	 */
	public void renderString3D() {
		region.render(null, 0, 0, 0);
	}
	/** Render the Object based using the associated Region
	 *  previously generated.
	 */
	public void renderString3D(PMVMatrix matrix, int vp_width, int vp_height, int size) {
		region.render(matrix, vp_width, vp_height, size);
	}
	
	/** Get the Origion of this GlyphString
	 * @return 
	 */
	public PointTex getOrigin() {
		return origin;
	}

	/** Destroy the associated OGL objects
	 */
	public void destroy(){
		region.destroy();
	}
}