// By Scott Brown 16 October 2009
// http://kodama.angrypixel.org
//
// Multi-screen output from Andres Colubri's 'TextureWindow'

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

GLTexture srcTex, destTex;
GLTextureFilter invert;
GLTextureWindow texWin;
GSCapture cam;
int numPixels;
float mouseDist = 50.0;

void setup() {
  size(1000, 600, GLConstants.GLGRAPHICS);
  background(0);
  
  cam = new GSCapture(this, 640, 480, 24);
  numPixels = cam.width * cam.height;
  
  invert = new GLTextureFilter(this, "MouseInvert.xml");
  srcTex = new GLTexture(this);
  destTex = new GLTexture(this);
  
  smooth();
}

void draw() {
  if (cam.available()) {
    cam.read();
    cam.loadPixels();
    loadPixels();
    srcTex.putPixelsIntoTexture(cam);

    // Mouse coordinates need to be mapped to the texture size:
    float x = map(mouseX, 25, 665, 0, srcTex.width);
    float y = map(mouseY, 25, 505, 0, srcTex.height);
    invert.setParameterValue("mpos", new float[]{x, y});
    invert.setParameterValue("mdist", mouseDist);
    invert.apply(srcTex, destTex);
    // The last line is equivalent to:
    // srcTex.filter(invert, destTex);    
 
    image(destTex, 25, 25, 640, 480);
  }
}