Java2D drawing colored bitmap fonts

joeyismusic

Junior Devvie

« Posted 2012-04-25 12:47:24 »

I couldn't come up with a more elegant way of drawing any color font from a single bitmap (png) font loaded in memory.

The only way I could get it to work was to render everything into a buffered image, which is then modified at pixel level by the font drawing.

The only other way I can think of how to do this would be to create the buffered image, then steal its array, and have to do my own pixel copying / color operations from there on instead of using drawImage calls... But I'd really like to avoid going that far if I could!

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public final class Font {

   private static int trans = 16777215;

   public static final int w = 8;
   public static final int h = 8;
   
   public static void printString(BufferedImage bimg, String string, int x, int y, int width, int color, int bgcolor) {
      int px = 0;
      int py = 0;
      char c;
      int sx;
      int sy;
      int pixel_x = 0;
      int pixel_y = 0;
      int ix = 0;
      int iy = 0;
      int i = 0;
      int src_color = 0;
      
      for(i = 0; i < string.length(); i++) {
         c = string.charAt(i);
         if(c == 32) {
            px += w * 2;
            if(px / (w * 2) > width) {
               px = 0;
               py += h * 2;
            }
            continue;
         }
         sx = c;
         sy = 0;
         while(sx > 15) {
            sx -= 16;
            sy++;
         }
         sx *= w;
         sy *= h;
         for(ix = 0; ix < w; ix++) {
            for(iy = 0; iy < h; iy++) {
               src_color = Art.font.getRGB(sx + ix, sy + iy);
               if(src_color != trans) {
                  pixel_x = x + px + (ix * 2);
                  pixel_y = y + py + (iy * 2);
                  if(pixel_x >= 0 && pixel_x + 2 < Game.WIDTH && pixel_y >= 0 && pixel_y + 2 < Game.HEIGHT) {
                     bimg.setRGB(pixel_x + 1, pixel_y + 1, bgcolor);
                     bimg.setRGB(pixel_x + 2, pixel_y + 2, bgcolor);
                     bimg.setRGB(pixel_x + 2, pixel_y + 1, bgcolor);
                     bimg.setRGB(pixel_x + 1, pixel_y + 2, bgcolor);
                  }
                  if(pixel_x >= 0 && pixel_x + 1 < Game.WIDTH && pixel_y >= 0 && pixel_y + 1 < Game.HEIGHT) {
                     bimg.setRGB(pixel_x + 0, pixel_y + 0, color);
                     bimg.setRGB(pixel_x + 1, pixel_y + 1, color);
                     bimg.setRGB(pixel_x + 1, pixel_y + 0, color);
                     bimg.setRGB(pixel_x + 0, pixel_y + 1, color);
                  }
               }
            }
         }
         px += w * 2;
         if(px / (w * 2) > width) {
            px = 0;
            py += h * 2;
         }
      }
   }
}

Tom-Todd

Senior Newbie