mirror of
https://github.com/cc65/cc65.git
synced 2024-11-18 00:07:21 +00:00
17333e4732
My Git and repositories are configured for POSIX; but sometimes, Windows line endings "sneak" into new files.
95 lines
2.6 KiB
C
95 lines
2.6 KiB
C
/*
|
|
** Calibrate lightpen drivers to the current video hardware.
|
|
**
|
|
** 2013-07-25, Greg King
|
|
**
|
|
*/
|
|
|
|
|
|
#include <conio.h>
|
|
#include <mouse.h>
|
|
#include <pen.h>
|
|
|
|
|
|
#define COMMAND1 "Adjust by clicking on line."
|
|
#define COMMAND2 "Finish by clicking off bar."
|
|
|
|
|
|
/*
|
|
** There is a delay between when the VIC sends its signal, and when the display
|
|
** shows that signal. There is another delay between the display and when
|
|
** the lightpen says that it saw that signal. Each display and pen is different.
|
|
** Therefore, the driver must be calibrated to them. A white bar is painted on
|
|
** the screen; and, a line is drawn down the middle of it. When the user clicks
|
|
** on that line, the difference between its position and where the VIC thinks
|
|
** that the pen is pointing becomes an offset that is subtracted from what the
|
|
** VIC sees.
|
|
*/
|
|
void __fastcall__ pen_calibrate (unsigned char *XOffset)
|
|
{
|
|
unsigned char oldBg = bgcolor (COLOR_BLUE);
|
|
unsigned char oldText = textcolor (COLOR_GRAY3);
|
|
unsigned char oldRev = revers (1);
|
|
unsigned char sprite0Color = VIC.spr_color[0];
|
|
unsigned char width, width2, height, height4, height8;
|
|
struct mouse_info info;
|
|
|
|
screensize (&width, &height);
|
|
width2 = width / 2;
|
|
height4 = height / 4;
|
|
height8 = height4 * 8;
|
|
|
|
/* Draw a bar and line. */
|
|
|
|
clrscr ();
|
|
cclearxy (0, height4, height4 * width);
|
|
cvlinexy (width2, height4 + 1, height4 - 2);
|
|
revers (0);
|
|
|
|
/* Print instructions. */
|
|
|
|
cputsxy (width2 - (sizeof COMMAND1) / 2, height / 2 + 1, COMMAND1);
|
|
cputsxy (width2 - (sizeof COMMAND2) / 2, height / 2 + 3, COMMAND2);
|
|
|
|
VIC.spr_color[0] = COLOR_GRAY2;
|
|
mouse_show ();
|
|
mouse_move (width2 * 8, height8 / 2);
|
|
|
|
for (;;) {
|
|
/* Wait for the main button to be released. */
|
|
|
|
do ; while ((mouse_buttons () & MOUSE_BTN_LEFT));
|
|
|
|
/* Wait for the main button to be pressed. */
|
|
|
|
do {
|
|
mouse_info (&info);
|
|
} while (!(info.buttons & MOUSE_BTN_LEFT));
|
|
|
|
/* Find out if the pen is on or off the bar. */
|
|
|
|
if (info.pos.y < height8 || info.pos.y >= height8 * 2) {
|
|
break;
|
|
}
|
|
|
|
/* On the bar; adjust the offset. */
|
|
/* Characters are eight pixels wide.
|
|
** The VIC-II sees every other pixel;
|
|
** so, we use half of the difference.
|
|
*/
|
|
|
|
*XOffset += (info.pos.x - (width2 * 8 + 8/2)) / 2;
|
|
}
|
|
|
|
/* Off the bar; wait for the main button to be released. */
|
|
|
|
do ; while ((mouse_buttons () & MOUSE_BTN_LEFT));
|
|
|
|
mouse_hide ();
|
|
VIC.spr_color[0] = sprite0Color;
|
|
revers (oldRev);
|
|
textcolor (oldText);
|
|
bgcolor (oldBg);
|
|
clrscr ();
|
|
}
|