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package com.jogamp.graph.curve.opengl;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import javax.media.opengl.GL2ES2;
import jogamp.graph.curve.text.GlyphString;
import jogamp.graph.font.FontInt;
import jogamp.graph.geom.plane.AffineTransform;
import jogamp.graph.geom.plane.Path2D;
import com.jogamp.graph.font.Font;
import com.jogamp.graph.geom.Vertex;
public abstract class TextRenderer extends Renderer {
/**
* Create a Hardware accelerated Text Renderer.
* @param factory optional Point.Factory for Vertex construction. Default is Vertex.Factory.
*/
public static TextRenderer create(Vertex.Factory<? extends Vertex> factory, int type) {
return new jogamp.graph.curve.opengl.TextRendererImpl01(factory, type);
}
protected TextRenderer(Vertex.Factory<? extends Vertex> factory, int type) {
super(factory, type);
}
/** Render the String in 3D space wrt to the font provided at the position provided
* the outlines will be generated, if not yet generated
* @param gl the current GL state
* @param font {@link Font} to be used
* @param str text to be rendered
* @param position the lower left corner of the string
* @param fontSize font size
* @param texSize texture size for multipass render
* @throws Exception if TextRenderer not initialized
*/
public abstract void renderString3D(GL2ES2 gl, Font font,
String str, float[] position, int fontSize, int texSize);
/**Create the resulting {@link GlyphString} that represents
* the String wrt to the font.
* @param font {@link Font} to be used
* @param size font size
* @param str {@link String} to be created
* @param sharpness parameter for Region generation of the resulting GlyphString
* @return the resulting GlyphString inclusive the generated region
*/
public GlyphString createString(GL2ES2 gl, Font font, int size, String str, float sharpness) {
if(DEBUG) {
System.err.println("createString: "+getCacheSize()+"/"+getCacheLimit()+" - "+Font.NAME_UNIQUNAME + " - " + str + " - " + size);
}
AffineTransform affineTransform = new AffineTransform(pointFactory);
Path2D[] paths = new Path2D[str.length()];
((FontInt)font).getOutline(str, size, affineTransform, paths);
GlyphString glyphString = new GlyphString(pointFactory, font.getName(Font.NAME_UNIQUNAME), str);
glyphString.createfromFontPath(paths, affineTransform);
glyphString.generateRegion(gl.getContext(), sharpness, st, renderType);
return glyphString;
}
public void flushCache() {
Iterator<GlyphString> iterator = stringCacheMap.values().iterator();
while(iterator.hasNext()){
GlyphString glyphString = iterator.next();
glyphString.destroy();
}
stringCacheMap.clear();
stringCacheArray.clear();
}
@Override
protected void disposeImpl(GL2ES2 gl) {
flushCache();
}
/**
* Sets the cache limit for reusing GlyphString's and their Region.
* Default is {@link #DEFAULT_CACHE_LIMIT}, -1 unlimited, 0 turns cache off, >0 limited
*
* @param newLimit new cache size
*
* @see #DEFAULT_CACHE_LIMIT
*/
public final void setCacheLimit(int newLimit ) { stringCacheLimit = newLimit; validateCache(0); }
public final int getCacheLimit() { return stringCacheLimit; }
/**
* @return the current utilized cache size, <= {@link #getCacheLimit()}
*/
public final int getCacheSize() { return stringCacheArray.size(); }
protected final void validateCache(int space) {
if ( getCacheLimit() > 0 ) {
while ( getCacheSize() + space > getCacheLimit() ) {
removeCachedGlyphString(0);
}
}
}
protected final GlyphString getCachedGlyphString(Font font, String str, int fontSize) {
return stringCacheMap.get(getKey(font, str, fontSize));
}
protected final void addCachedGlyphString(Font font, String str, int fontSize, GlyphString glyphString) {
if ( 0 != getCacheLimit() ) {
final String key = getKey(font, str, fontSize);
GlyphString oldGlyphString = stringCacheMap.put(key, glyphString);
if ( null == oldGlyphString ) {
// new entry ..
validateCache(1);
stringCacheArray.add(stringCacheArray.size(), key);
} /// else overwrite is nop ..
}
}
protected final void removeCachedGlyphString(Font font, String str, int fontSize) {
final String key = getKey(font, str, fontSize);
GlyphString glyphString = stringCacheMap.remove(key);
if(null != glyphString) {
glyphString.destroy();
}
stringCacheArray.remove(key);
}
protected final void removeCachedGlyphString(int idx) {
final String key = stringCacheArray.remove(idx);
final GlyphString glyphString = stringCacheMap.remove(key);
if(null != glyphString) {
glyphString.destroy();
}
}
protected final String getKey(Font font, String str, int fontSize) {
return font.getName(Font.NAME_UNIQUNAME) + "." + str.hashCode() + "." + fontSize;
}
/** Default cache limit, see {@link #setCacheLimit(int)} */
public static final int DEFAULT_CACHE_LIMIT = 256;
private HashMap<String, GlyphString> stringCacheMap = new HashMap<String, GlyphString>(DEFAULT_CACHE_LIMIT);
private ArrayList<String> stringCacheArray = new ArrayList<String>(DEFAULT_CACHE_LIMIT);
private int stringCacheLimit = DEFAULT_CACHE_LIMIT;
}
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