package net.phatcode.rel.multimedia; /**
*
* @author Richard Eric M. Lope (Relminator)
* @version 1.00 2013/3/04
*/
// ************************************************************************
//
// Sprite Atlas Class
// Can use fixed tilesizes or variable sized images
// Richard Eric M. Lope (relminator)
// http://rel.phatcode.net
//
// ************************************************************************
import de.matthiasmann.twl.utils.PNGDecoder;
import org.lwjgl.opengl.GL11;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
class ImageAtlas
{
private int textureID = 0;
private int width = 0;
private int height = 0;
private SpriteGL[] sprites;
ImageAtlas( ImageTextureData textureData, int filtermode )
{
InputStream in;
ByteBuffer buf = null;
PNGDecoder decoder;
try
{
//in = textureData.getUrl().openStream();
in = new FileInputStream(textureData.getPath());
decoder = new PNGDecoder(in);
width = decoder.getWidth();
height = decoder.getHeight();
buf = ByteBuffer.allocateDirect(4*decoder.getWidth()*decoder.getHeight());
decoder.decode( buf, decoder.getWidth()*4, PNGDecoder.Format.RGBA );
buf.flip();
in.close();
}
catch( IOException e )
{
e.printStackTrace();
}
int tileWidth = width;
int tileHeight = height;
int numImages = (width/tileWidth) * (height/tileHeight);
textureID = GL11.glGenTextures();
GL11.glBindTexture(GL11.GL_TEXTURE_2D, textureID);
GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_S, GL11.GL_REPEAT);
GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_T, GL11.GL_REPEAT);
GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, filtermode);
GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, filtermode);
GL11.glTexImage2D( GL11.GL_TEXTURE_2D, 0, GL11.GL_RGBA8, width, height,
0, GL11.GL_RGBA, GL11.GL_UNSIGNED_BYTE, buf );
sprites = new SpriteGL[numImages];
int i = 0;
for( int y = 0; y < (height/tileHeight); y++)
{
for( int x = 0; x < (width/tileWidth); x++)
{
int ix = x * tileWidth;
int iy = y * tileHeight;
sprites[i] = new SpriteGL();
sprites[i].width = tileWidth;
sprites[i].height = tileHeight;
sprites[i].u1 = ix / (float)width;
sprites[i].v1 = iy / (float)height;
sprites[i].u2 = (ix + tileWidth ) / (float)width;
sprites[i].v2 = (iy + tileHeight ) / (float)height;
sprites[i].textureID = textureID;
i++;
}
}
}
ImageAtlas( ImageTextureData textureData, int tileWidth, int tileHeight, int filtermode )
{
InputStream in;
ByteBuffer buf = null;
PNGDecoder decoder;
try
{
in = textureData.getUrl().openStream();
decoder = new PNGDecoder(in);
width = decoder.getWidth();
height = decoder.getHeight();
buf = ByteBuffer.allocateDirect(4*decoder.getWidth()*decoder.getHeight());
decoder.decode( buf, decoder.getWidth()*4, PNGDecoder.Format.RGBA );
buf.flip();
in.close();
}
catch( IOException e )
{
e.printStackTrace();
}
int numImages = (width/tileWidth) * (height/tileHeight);
textureID = GL11.glGenTextures();
GL11.glBindTexture(GL11.GL_TEXTURE_2D, textureID);
GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_S, GL11.GL_REPEAT);
GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_T, GL11.GL_REPEAT);
GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, filtermode);
GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, filtermode);
GL11.glTexImage2D( GL11.GL_TEXTURE_2D, 0, GL11.GL_RGBA8, width, height,
0, GL11.GL_RGBA, GL11.GL_UNSIGNED_BYTE, buf );
sprites = new SpriteGL[numImages];
int i = 0;
for( int y = 0; y < (height/tileHeight); y++)
{
for( int x = 0; x < (width/tileWidth); x++)
{
int ix = x * tileWidth;
int iy = y * tileHeight;
sprites[i] = new SpriteGL();
sprites[i].width = tileWidth;
sprites[i].height = tileHeight;
sprites[i].u1 = ix / (float)width;
sprites[i].v1 = iy / (float)height;
sprites[i].u2 = (ix + tileWidth ) / (float)width;
sprites[i].v2 = (iy + tileHeight ) / (float)height;
sprites[i].textureID = textureID;
i++;
}
}
}
ImageAtlas( ImageTextureData textureData, int filtermode, int foo )
{
InputStream in;
ByteBuffer buf = null;
PNGDecoder decoder;
try
{
in = textureData.getUrl().openStream();
decoder = new PNGDecoder(in);
width = decoder.getWidth();
height = decoder.getHeight();
buf = ByteBuffer.allocateDirect(4*decoder.getWidth()*decoder.getHeight());
decoder.decode( buf, decoder.getWidth()*4, PNGDecoder.Format.RGBA );
buf.flip();
in.close();
}
catch( IOException e )
{
e.printStackTrace();
}
int numImages = textureData.getNumImages();
int texcoords[] = textureData.getArray();
sprites = new SpriteGL[numImages];
textureID = GL11.glGenTextures();
for( int i = 0; i < numImages; i++ )
{
int j = i * 4;
int x = texcoords[j];
int y = texcoords[j+1];
int w = texcoords[j+2];
int h = texcoords[j+3];
sprites[i] = new SpriteGL();
sprites[i].width = w;
sprites[i].height = h;
sprites[i].u1 = x / (float)width;
sprites[i].v1 = y / (float)height;
sprites[i].u2 = (x + w) / (float)width;
sprites[i].v2 = (y + h) / (float)height;
sprites[i].textureID = textureID;
}
int repeatMode = GL11.GL_REPEAT;
if( foo != 0 )
{
repeatMode = GL11.GL_CLAMP;
}
GL11.glBindTexture(GL11.GL_TEXTURE_2D, textureID);
GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_S, repeatMode);
GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_T, repeatMode);
GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, filtermode);
GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, filtermode);
GL11.glTexImage2D( GL11.GL_TEXTURE_2D, 0, GL11.GL_RGBA8, width, height,
0, GL11.GL_RGBA, GL11.GL_UNSIGNED_BYTE, buf );
}
public void shutDown()
{
GL11.glDeleteTextures( textureID );
}
public int getWidth()
{
return width;
}
public int getHeight()
{
return height;
}
public int getNumImages()
{
return sprites.length;
}
public SpriteGL getSprite( int index )
{
return sprites[index];
}
public int getTextureID()
{
return textureID;
}
public void setTextureID( int textureID )
{
this.textureID = textureID;
}
public void setWidth( int width )
{
this.width = width;
}
public void setHeight(int height)
{
this.height = height;
}
}
