Thought I would include the entire buildFont() method I got from Nehe.
//Creates the font Courier New to be used as the drawable font
private void buildFont()
{ // Build Our Bitmap Font
Font font; // Font object
String fontName = "Courier New"; // Name of the font to use
BufferedImage fontImage; // image for creating the bitmap
int bitmapSize = 512; // set the size for the bitmap texture
boolean sizeFound = false;
boolean directionSet = false;
int delta = 0;
int fontSize = 24;
//Finds the size of the widest character (W)
while(!sizeFound)
{
font = new Font(fontName, Font.PLAIN, fontSize); // Font Name
// use BufferedImage.TYPE_4BYTE_ABGR to allow alpha blending
fontImage = new BufferedImage(bitmapSize, bitmapSize, BufferedImage.TYPE_4BYTE_ABGR);
Graphics2D g = (Graphics2D)fontImage.getGraphics();
g.setFont(font);
FontMetrics fm = g.getFontMetrics();
int width = fm.stringWidth("W");
int height = fm.getHeight();
int lineWidth = (width > height) ? width * 16 : height * 16;
if(!directionSet)
{
if(lineWidth > bitmapSize)
delta = -2;
else
delta = 2;
directionSet = true;
}
if(delta > 0)
{
if(lineWidth < bitmapSize)
fontSize += delta;
else
{
sizeFound = true;
fontSize -= delta;
}
}
else if(delta < 0)
{
if(lineWidth > bitmapSize)
fontSize += delta;
else
{
sizeFound = true;
fontSize -= delta;
}
}
}
/* Now that a font size has been determined, create the final image, set the font and draw the
* standard/extended ASCII character set for that font.
*/
font = new Font(fontName, Font.BOLD, fontSize); // Font Name
// use BufferedImage.TYPE_4BYTE_ABGR to allow alpha blending
fontImage = new BufferedImage(bitmapSize, bitmapSize, BufferedImage.TYPE_4BYTE_ABGR);
Graphics2D g = (Graphics2D)fontImage.getGraphics();
g.setFont(font);
g.setColor(new Color(0xFFFFFFFF, true));
g.setBackground(new Color(0x00000000, true));
FontMetrics fm = g.getFontMetrics();
for(int i = 0; i < 256; i++)
{
int x = i % 16;
int y = i / 16;
char ch[] = {(char)i};
String temp = new String(ch);
g.drawString(temp, (x * 32) + 1, (y * 32) + fm.getAscent());
}
// Flip Image
AffineTransform tx = AffineTransform.getScaleInstance(1, -1);
tx.translate(0, -fontImage.getHeight(null));
AffineTransformOp op = new AffineTransformOp(tx, AffineTransformOp.TYPE_NEAREST_NEIGHBOR);
fontImage = op.filter(fontImage, null);
// Put Image In Memory
ByteBuffer scratch = ByteBuffer.allocateDirect(4 * fontImage.getWidth() * fontImage.getHeight());
byte data[] = (byte[])fontImage.getRaster().getDataElements(0,0,fontImage.getWidth(),fontImage.getHeight(),null);
scratch.clear();
scratch.put(data);
scratch.rewind();
// Create A IntBuffer For Image Address In Memory
IntBuffer buf = ByteBuffer.allocateDirect(4).order(ByteOrder.nativeOrder()).asIntBuffer();
GL11.glGenTextures(buf); // Create Texture In OpenGL
GL11.glBindTexture(GL11.GL_TEXTURE_2D, buf.get(0));
// Typical Texture Generation Using Data From The Image
// Linear Filtering
GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_LINEAR);
// Linear Filtering
GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_LINEAR);
// Generate The Texture
GL11.glTexImage2D(GL11.GL_TEXTURE_2D, 0, GL11.GL_RGBA, fontImage.getWidth(), fontImage.getHeight(), 0, GL11.GL_RGBA, GL11.GL_UNSIGNED_BYTE, scratch);
fontTexture = buf.get(0); // Return Image Address In Memory
base = GL11.glGenLists(256); // Storage For 256 Characters
/* Generate the display lists. One for each character in the standard/extended ASCII chart.
*/
float textureDelta = 1.0f / 16.0f;
for(int i=0;i<256;i++)
{
float u = ((float)(i % 16)) / 16.0f;
float v = 1.f - (((float)(i / 16)) / 16.0f);
GL11.glNewList(base + i, GL11.GL_COMPILE);
GL11.glBindTexture(GL11.GL_TEXTURE_2D, fontTexture);
GL11.glBegin(GL11.GL_QUADS);
GL11.glTexCoord2f(u, v);
GL11.glVertex3f(-0.0450f, 0.0450f, 0.0f);
GL11.glTexCoord2f((u + textureDelta), v);
GL11.glVertex3f(0.0450f, 0.0450f, 0.0f);
GL11.glTexCoord2f((u + textureDelta), v - textureDelta);
GL11.glVertex3f(0.0450f, -0.0450f, 0.0f);
GL11.glTexCoord2f(u, v - textureDelta);
GL11.glVertex3f(-0.0450f, -0.0450f, 0.0f);
GL11.glEnd();
GL11.glEndList();
}
}
Then the method to call it:
public static void glString(String str, int x, int y)
{
GL11.glTranslatef(x, y, 0); // Position The Text (in pixels coords) 0,0 is bottom right corner
if(str != null)
{
GL11.glBindTexture(GL11.GL_TEXTURE_2D, BestGameEver.textureLoader.fontTexture());
for(int i = 0; i < str.length(); i++)
{
GL11.glCallList(BestGameEver.textureLoader.base() + str.charAt(i));
GL11.glTranslatef(0.05f, 0.0f, 0.0f);
}
}
}
