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fg_readbox

Usage

   #include <fg.h>
   void char far fg_readbox(fg_const_pbox_t b, fg_color_t far *p);

Description

   Read box b (inclusive) pixels off of the screen and store into the
   fg_color_t array pointed to by p. The color of each pixel is written into
   each element. The number of bytes required is sizeof(fg_color_t) *
   fg_box_area(b) Rows are written first, in order of increasing y (this
   means starting at the lower left corner).


Example 

   {
       fg_color_t *color_p;
       fg_box_t read_box;
       read_box [FG_X1] = 10;
       read_box [FG_Y1] = 0;
       read_box [FG_X2] = 100;
       read_box [FG_Y2] = 100;
       color_p = malloc(sizeof(fg_color_t) *
   fg_box_area(read_box));
       assert(color_p != NULL);
       fg_readbox(read_box, color_p);
       .
       .
       .
   /*Need not be the same box, but must be the same size*/
       read_box [FG_X1] += 20;
       read_box [FG_X2] += 20;
       read_box [FG_Y1] += 30;

       read_box [FG_Y2] += 30;
       fg_writebox(read_box, color_p);
   }