Image Layer #2

image_layer_2.pde

String PATH = "/Users/bmoren/Desktop/Aspens_test/JPG/";
int IMAGE_NB = 0001; // first in sequence

int imageAlpha = 100;

PImage composition;
PImage workingImage;
boolean firstImage = true;

void setup()
{
 size(5184,3456);
 background(255);
 //tint(255,10); // this setting will stick
}

void draw() {
 String fileName = PATH + nf(IMAGE_NB++, 4) + ".jpg";

 if(firstImage) {
   firstImage = false;
   composition = loadImage(fileName);
   AddTransparency(composition,imageAlpha);
 } else {
   workingImage = loadImage(fileName);
   AddTransparency(workingImage,imageAlpha);
   composition.blend(workingImage, 0, 0, workingImage.width,
workingImage.height, 0, 0, workingImage.width, workingImage.height,
BLEND);
 }

 image(composition,0,0);
}

void keyPressed() {
 // spacebar to save the current image
 if (key == ' ') saveFrame("img_" + IMAGE_NB + ".jpg");
  print("exported");
}

void AddTransparency(PImage theImage, int transparency)
{
 // shift transparency (0-255) into the right location in the packed int
 transparency <<= 24;
 transparency |= 0x00FFFFFF; // mask everything else out
 for (int i = 0; i < theImage.width * theImage.height; i++) {
   theImage.pixels[i] &= transparency; // mask the pixel
 }
 theImage.updatePixels(); // update the pixels
 theImage.format = ARGB; // it's got an alpha layer now
 saveFrame("img_" + IMAGE_NB + ".jpg");
}