package font;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.util.SortedMap;
import java.util.TreeMap;
import com.threed.jpct.FrameBuffer;
/**
* <p>creates GL renderable (blittable) font out of given AWT font.
* a jPCT texture is created and added to TextureManager on the fly.</p>
*
* <p>in contrast with its name, this class can be used for software renderer too.
* but to tell the truth, i would stick to Java2D for software renderer ;)</p>
*
* this class uses {@link TexturePack} behind the scenes.
*
* @see TexturePack
*
* @author hakan eryargi (r a f t)
*/
public class GLFont {
/** standard characters */
public static final String ENGLISH = " abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ`1234567890-=~!@#$%^&*()_+[]{}\\|:;\"'<>,.?/";
/** German specific characters */
public static final String GERMAN = new String(new char[] {
'\u00c4', '\u00D6', '\u00DC', '\u00E4', '\u00F6', '\u00FC', '\u00DF' });
/** French specific characters */
public static final String FRENCH = new String(new char[] {
'\u00C0', '\u00C2', '\u00C6', '\u00C8', '\u00C9', '\u00CA', '\u00CB',
'\u00CE', '\u00CF', '\u00D4', '\u0152', '\u00D9', '\u00DB', '\u00DC',
'\u0178', '\u00C7', '\u00E0', '\u00E2', '\u00E6', '\u00E8', '\u00E9',
'\u00EA', '\u00EB', '\u00EE', '\u00EF', '\u00F4', '\u0153', '\u00F9',
'\u00FB', '\u00FC', '\u00FF', '\u00E7' });
/** Turkish specific characters */
public static final String TURKISH = new String(new char[] {
'\u00e7', '\u00c7', '\u011f', '\u011e', '\u0131', '\u0130',
'\u00f6', '\u00d6', '\u015f', '\u015e', '\u00fc', '\u00dc' });
/**
* same as getGLFont(font, ENGLISH)
* @see #getGLFont(Font, String)
* */
public static GLFont getGLFont(Font font) {
return getGLFont(font, ENGLISH);
}
/** returns cached font or creates a new one caches and returns it.
* note: cache mechanism doesnt take alphabet into account. */
public static GLFont getGLFont(Font font, String alphabet) {
String key = font.getName() + "/" + font.getSize() + "/" + font.getStyle();
synchronized (FONTS) {
GLFont glFont = FONTS.get(key);
if (glFont == null) {
glFont = new GLFont(font, alphabet);
FONTS.put(key, glFont);
}
return glFont;
}
}
/** our font cache */
private static SortedMap<String, GLFont> FONTS = new TreeMap<String, GLFont>();
/** the awt font */
public final Font font;
/** characters this GLFont is created for */
public final String alphabet;
/** regular font height. note some special characters may not fit into this height.
* see {@link FontMetrics} for a discussion */
public final int fontHeight;
private final int baseline;
private final int[] charWidths;
private final Dimension stringBounds = new Dimension();
private final TexturePack pack = new TexturePack();
/**
* creates a GLFont for given awt Font consists of default characters.
* @see #ENGLISH
*/
public GLFont(Font font) {
this(font, ENGLISH);
}
/**
* creates a GLFont for given awt Font consists of characters in given alphabet
* @param font the awt font
* @param alphabet characters of our alphabet
*/
public GLFont(Font font, String alphabet) {
this.font = font;
this.alphabet = eliminateDuplicates(alphabet);
this.charWidths = new int[alphabet.length()];
Graphics2D g2d = new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB).createGraphics();
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
FontMetrics fontMetrics = g2d.getFontMetrics(font);
this.fontHeight = fontMetrics.getHeight();
this.baseline = fontMetrics.getMaxAscent();
int height = fontMetrics.getMaxAscent() + fontMetrics.getMaxDescent();
for (int i = 0; i < alphabet.length(); i++) {
String c = alphabet.substring(i, i + 1);
Rectangle2D bounds = fontMetrics.getStringBounds(c, g2d);
int width = (int) bounds.getWidth();
charWidths[i] = width;
BufferedImage charImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
Graphics2D charGraphics = charImage.createGraphics();
charGraphics.setRenderingHints(g2d.getRenderingHints());
charGraphics.setFont(font);
charGraphics.setColor(Color.WHITE);
charGraphics.drawString(c, 0, baseline);
charGraphics.dispose();
pack.addImage(charImage);
}
pack.pack(TexturePack.ALPHA_USE);
}
private String eliminateDuplicates(String s) {
StringBuilder sb = new StringBuilder(s);
for (int i = 0; i < sb.length(); i++) {
String c = sb.substring(i, i + 1);
int next = -1;
while ((next = sb.indexOf(c, i + 1)) != -1) {
sb.deleteCharAt(next);
}
}
return sb.toString();
}
/**
* returns how much area given string occupies. note this method always
* returns same Dimension instance
*/
public Dimension getStringBounds(String s) {
int width = 0;
for (int i = 0; i < s.length(); i++) {
char c = s.charAt(i);
int index = alphabet.indexOf(c);
if (index == -1)
index = alphabet.indexOf('?');
if (index != -1) {
width += charWidths[index];
}
}
stringBounds.setSize(width, fontHeight);
return stringBounds;
}
/**
* blits given string to frame buffer. works very similar to
* awt.Graphics#drawString(..) that is: x coordinate is left most point in
* string, y is baseline
*
* @param buffer
* buffer to blit into
* @param s
* string to blit
* @param x
* leftmost point
* @param transparency
* transparency value, make sure >= 0
* @param color
* text color
* @param y
* baseline
*/
public void blitString(FrameBuffer buffer, String s, int x, int y, int transparency, Color color) {
y -= baseline;
for (int i = 0; i < s.length(); i++) {
char c = s.charAt(i);
int index = alphabet.indexOf(c);
if (index == -1)
index = alphabet.indexOf('?');
if (index != -1) {
Dimension size = pack.blit(buffer, index, x, y, transparency, false, color);
x += size.width;
}
}
}
}