rgb24_blt
Description:
public abstract void rgb24_blt (uint8[] src, int rowstride, uint16 x, uint16 y, uint16 width, uint16 height)
  
  Fill all the pixels in the range (x, y) to (x + width, y + height
      ) to the value in src.
 The number of bytes in src is always 3 as it must be in plain RGB24 format.
Parameters:
| this | 
           the framebuffer object  | 
      
| src | 
           the new pixel data  | 
      
| rowstride | 
           the number of bytes per row  | 
      
| x | 
           the horizontal pixel to start filling  | 
      
| y | 
           the vertical pixel to start filling  | 
      
| width | 
           the number of pixels to fill horizontally  | 
      
| height | 
           the number of pixels to fill vertically  |