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- /* Program to demonstrate mode X (320x240, 256-colors) rectangle
- fill by drawing adjacent 20x20 rectangles in successive colors from
- 0 on up across and down the screen
- Tested with Borland C++ 4.02 in small model by Jim Mischel 12/16/94.
- */
- #include <conio.h>
- #include <dos.h>
-
- void Set320x240Mode(void);
- void FillRectangleX(int, int, int, int, unsigned int, int);
-
- void main() {
- int i,j;
- union REGS regset;
-
- Set320x240Mode();
- FillRectangleX(0,0,320,240,0,0); /* clear the screen to black */
- for (j = 1; j < 220; j += 21) {
- for (i = 1; i < 300; i += 21) {
- FillRectangleX(i, j, i+20, j+20, 0, ((j/21*15)+i/21) & 0xFF);
- }
- }
- getch();
- regset.x.ax = 0x0003; /* switch back to text mode and done */
- int86(0x10, ®set, ®set);
- }
-
-