[Desktop Entry]

Version=3.3.

Type=Application

Name=Processing IDE

Icon=/opt/processing-3.3./lib/icons/pde-.png

Exec=/opt/processing-3.3./processing

Comment=Processing IDE

Categories=Development;IDE;

Terminal=false

// THIS IS NOT ARDUINO CODE!  Runs in Processing IDE (www.processing.org).

// Convert image to C header file suitable for the Adafruit_Thermal library.

void setup() {

  // Select and load image

  selectInput("Select image file to convert:", "processImage");

}

void processImage(File image) {

  String      filename, basename;

  PImage      img;

  PrintWriter output;

  int         pixelNum, byteNum, bytesOnLine = ,

              x, y, b, rowBytes, totalBytes, lastBit, sum;

  println("Loading image...");

  filename = image.getPath();

  img      = loadImage(image.getPath());

  // Morph filename into output filename and base name for data

  x = filename.lastIndexOf('.');

  if(x > ) filename = filename.substring(, x);  // Strip current extension

  x = filename.lastIndexOf('/');

  if(x > ) basename = filename.substring(x + ); // Strip path

  else      basename = filename;

  filename += ".h"; // Append '.h' to output filename

  println("Writing output to " + filename);

  // Calculate output size

  rowBytes   = (img.width + ) / ;

  totalBytes = rowBytes * img.height;

  // Convert image to B&W, make pixels readable

  img.filter(THRESHOLD);

  img.loadPixels();

  // Open header file for output (NOTE: WILL CLOBBER EXISTING .H FILE, if any)

  output = createWriter(filename); 

  // Write image dimensions and beginning of array

  output.println("#ifndef _" + basename + "_h_");

  output.println("#define _" + basename + "_h_");

  output.println();

  output.println("#define " + basename + "_width  " + img.width);

  output.println("#define " + basename + "_height " + img.height);

  output.println();

  output.print("static const uint8_t PROGMEM " + basename + "_data[] = {");

  // Generate body of array

  for(pixelNum=byteNum=y=; y<img.height; y++) { // Each row...

    for(x=; x<rowBytes; x++) { // Each 8-pixel block within row...

      lastBit = (x < rowBytes - ) ?  : ( << (rowBytes *  - img.width));

      sum     = ; // Clear accumulated 8 bits

      for(b=; b>=lastBit; b >>= ) { // Each pixel within block...

        if((img.pixels[pixelNum++] & ) == ) sum |= b; // If black pixel, set bit

      }

      if(++bytesOnLine >= ) { // Wrap nicely

          output.print("\n ");

          bytesOnLine = ;

      }

      output.format(" 0x%02X", sum); // Write accumulated bits

      if(++byteNum < totalBytes) output.print(',');

    }

  }

  // End array, close file, exit program

  output.println();

  output.println("};");

  output.println();

  output.println("#endif // _" + basename + "_h_");

  output.flush();

  output.close();

  println("Done!");

  exit();

}