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package gl4java.utils.textures;
import gl4java.*;
import java.awt.*;
import java.awt.image.*;
// import java.awt.Color.*;
// import java.awt.color.*;
import java.awt.event.*;
import java.applet.*;
import java.io.*;
import java.net.*;
/**
* This Class implements the universal
* texture-loader using the AWT's standard interface !
*
* The number of image-types depends
* on the JDK version you use !
*
* @see TextureLoader
*/
public class AWTTextureLoader
extends TextureLoader
{
Component comp;
public AWTTextureLoader(Component comp, GLFunc gl, GLUFunc glu)
{
super(gl, glu);
this.comp=comp;
}
public boolean readTexture(String fname)
{
Image img = comp.getToolkit().getImage(fname);
return readTexture(comp, img);
}
public boolean readTexture(URL base, String uri)
{
try {
URL url = new URL (base, uri);
Image img = comp.getToolkit().getImage(url);
return readTexture(comp, img);
} catch (Exception ex) {
System.out.println("AWTTextureLoader.readTexture <"+
base+" / "+uri+"> failed !\n"+ex);
}
return false;
}
private boolean readTexture(Component comp, Image img)
{
try {
try {
MediaTracker tracker = new MediaTracker(comp);
tracker.addImage(img, 0);
tracker.waitForID(0);
}
catch ( Exception e ) {}
imageWidth = img.getWidth(comp);
imageHeight = img.getHeight(comp);
/* This is Java2 only code :-(
BufferedImage image =
new BufferedImage(imageWidth, imageHeight,
BufferedImage.TYPE_INT_RGB);
Graphics g = image.createGraphics();
g.drawImage(img,0,0,comp);
imageWidth = image.getWidth();
imageHeight = image.getHeight();
*/
// Read entire PNG image (doesn't throw exceptions)
int[] iPixels = new int[imageWidth * imageHeight];
PixelGrabber pp=new PixelGrabber(img,
0,0,
imageWidth, imageHeight,
iPixels,
0,
imageWidth);
try
{
pp.grabPixels();
}
catch (InterruptedException e)
{
System.err.println("interrupted waiting for pixel!");
error=true;
return false;
}
if ((pp.getStatus() & ImageObserver.ABORT) != 0)
{
System.err.println("image fetch aborted or errored");
error=true;
return false;
}
/* This is Java2 only code :-(
int imagetype = image.getType();
switch(imagetype)
{
case BufferedImage.TYPE_INT_RGB:
glFormat=GL_RGB;
break;
case BufferedImage.TYPE_INT_ARGB:
case BufferedImage.TYPE_INT_ARGB_PRE:
glFormat=GL_RGBA;
break;
default:
error=true;
System.err.println("unsupported format: "+imagetype);
return false;
};
*/
//
// we are guessing the RGB type,
// because fetching the true type
// is Java2 only code :-(
//
glFormat=GL_RGB;
setTextureSize();
pixel=new byte[imageWidth * imageHeight * getComponents()];
int offset=0;
int aPixel;
int y_desc;
for(y_desc=imageHeight-1; y_desc>=0; y_desc--)
{
for(int x=0;x<imageWidth;x++)
{
aPixel = iPixels[y_desc*imageWidth + x];
// red
pixel[offset++]=
new Integer( (aPixel >> 16) & 0xff ).byteValue();
// green
pixel[offset++]=
new Integer( (aPixel >> 8) & 0xff ).byteValue();
// blue
pixel[offset++]=
new Integer( (aPixel ) & 0xff ).byteValue();
// alpha
if(glFormat==GL_RGBA)
pixel[offset++]=
new Integer( (aPixel >> 24) & 0xff ).byteValue();
}
}
return true;
} catch (Exception e) {
System.out.println("An exception occured, while loading a AWTTexture");
System.out.println(e);
error=true;
}
return false;
}
}
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