Listing 2. Get the clip rectangle for the image.

//Get the current clip rectangle for the image. This is // (one less than) the size of the image in both // dimensions. get_clip_rect(picA, &upperLeftX, &upperLeftY, &lowerRightX, &lowerRightY); //Compute the width and the height from the coordinates // of the diagonal corners of the clip rectangle. width = lowerRightX + 1; height = lowerRightY + 1;