PixelData.java

// PixelData.java

import javax.microedition.lcdui.*;

public class PixelData {
  private int[] pixels;
  private int width;
  private int height;

  private PixelData(int[] pixels, int width, int height)
    {
      this.pixels = pixels;
      this.width  = width;
      this.height = height;
    }

  public PixelData(int width, int height)
    {
      this(new int[width * height], width, height);
    }

  public static PixelData createPixelData(String filename)
    throws java.io.IOException
    {
      Image img = Image.createImage(filename);
      int[] pixels = new int[img.getWidth() * img.getHeight()];
      img.getRGB(pixels, 0, img.getWidth(), 0, 0, img.getWidth(), img.getHeight());
      return new PixelData(pixels, img.getWidth(), img.getHeight());
    }

  private int index(int x, int y)
    {
      return y * this.width + x;
    }

  // deprecated
  public int getPixel(int i)
    {
      return this.pixels[i];
    }

  public int getPixel(int x, int y)
    {
      return this.pixels[index(x, y)];
    }

  // deprecated
  // (あとで消す)
  public void setPixel(int i, int v)
    {
      this.pixels[i] = v;
    }

  public void setPixel(int x, int y, int v)
    {
      this.pixels[index(x, y)] = v;
    }

  // deprecated
  // (あとで消す)
  public int length() { return this.pixels.length; }

  public int getWidth() { return this.width; }
  public int getHeight() { return this.height; }

  public Image createRGBImage()
    {
      return Image.createRGBImage(this.pixels, this.width, this.height, false);
    }

  // fill a given rectangle area
  //
  // @param x  x-coordinate of the filling rectangle
  // @param y  y-coordinate of the filling rectangle
  // @param w  width of the filling rectangle
  // @param h  height of the filling rectangle
  // @param c  fill color
  public void fillRect(int x, int y, int w, int h, int c)
    {
      for (int i = 0; i < h && i + y < getHeight(); ++i) {
        for (int j = 0; j < w && j + x < getWidth(); ++j) {
          this.pixels[index(j + x, i + y)] = c;
        }
      }
    }
}