Copy a rectangular area (cont'd)

The third and fourth parameters in the call to blit in Listing 4:

• Specify the coordinates of the upper-left corner
• Of the rectangle in the source bitmap
• That will be copied to the destination bitmap

The fifth and sixth parameters specify:

• The coordinates of the upper-left corner
• In the destination bitmap
• To which the rectangle of pixel values will be copied.

The last two parameters specify the width and height of the rectangle in pixels.