// Implementation of a "banded blending" between two textures 
// using GLTextureFilter. 
// The output image is generated by alternatively taking one
// horizontal band of pixels from texture 0 and 1.
// The size of the band can be adjusted.
// By Andres Colubri

import processing.opengl.*;
import codeanticode.glgraphics.*;

size(256, 256, GLConstants.GLGRAPHICS);

GLTexture tex0 = new GLTexture(this, "beach.jpg");
GLTexture tex1 = new GLTexture(this, "peebles.jpg");
GLTexture tex2 = new GLTexture(this, 256, 256);

GLTextureFilter bandedBlend = new GLTextureFilter(this, "BandedBlend.xml");

bandedBlend.setParameterValue("band_size", 1);
bandedBlend.apply(new GLTexture[]{tex0, tex1}, tex2);

image(tex2, 0, 0);