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package gl4java.utils.textures;
import gl4java.*;
import java.io.*;
import java.net.*;
public class TGATextureGrabber
extends TextureGrabber
{
public TGATextureGrabber(GLFunc gl)
{
super(gl);
}
public boolean write2File(OutputStream os)
{
try {
DataOutputStream fout= new DataOutputStream(os);
//write TGA header
fout.writeByte(0); //ID length, 0 because no image id field
fout.writeByte(0); //no color map
fout.writeByte(2); //image type (24 bit RGB, uncompressed)
fout.writeShort(0); //color map origin, ignore because no color map
fout.writeShort(0); //color map length, ignore because no color map
fout.writeByte(0); //color map entry size, ignore because no color map
fout.writeShort(0); //x origin
fout.writeShort(0); //y origin
short s = (short)width;
fout.writeByte((byte)(s & 0x00ff)); //image width low byte
fout.writeByte((byte)((s & 0xff00)>>8)); //image width high byte
s = (short)height;
fout.writeByte((byte)(s & 0x00ff)); //image height low byte
fout.writeByte((byte)((s & 0xff00)>>8)); //image height high byte
fout.writeByte(24); //bpp
fout.writeByte(0); //description bits
//process image data:
// TGA pixels should be written in BGR format,
// so R en B should be switched
byte tmp;
for (int i=0; i<(width*height*3); i+=3) {
tmp=pixels[i];
pixels[i]=pixels[i+2];
pixels[i+2]=tmp;
}
//write TGA image data
fout.write(pixels, 0, pixels.length);
fout.flush();
fout.close();
} catch (Exception ex) {
System.out.println("TGATextureGrabber.write2File <os> failed !\n"+ex);
return false;
}
return true;
}
}
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