mirror of
https://github.com/cc65/cc65.git
synced 2024-08-17 19:29:12 +00:00
79 lines
3.6 KiB
C
79 lines
3.6 KiB
C
/*****************************************************************************/
|
|
/* */
|
|
/* pen.h */
|
|
/* */
|
|
/* Lightpen API */
|
|
/* */
|
|
/* */
|
|
/* This software is provided "as-is", without any expressed or implied */
|
|
/* warranty. In no event will the authors be held liable for any damages */
|
|
/* arising from the use of this software. */
|
|
/* */
|
|
/* Permission is granted to anyone to use this software for any purpose, */
|
|
/* including commercial applications, and to alter it and redistribute it */
|
|
/* freely, subject to the following restrictions: */
|
|
/* */
|
|
/* 1. The origin of this software must not be misrepresented; you must not */
|
|
/* claim that you wrote the original software. If you use this software */
|
|
/* in a product, an acknowledgment in the product documentation would be */
|
|
/* appreciated, but is not required. */
|
|
/* 2. Altered source versions must be marked plainly as such; and, must not */
|
|
/* be misrepresented as being the original software. */
|
|
/* 3. This notice may not be removed or altered from any source */
|
|
/* distribution. */
|
|
/* */
|
|
/*****************************************************************************/
|
|
|
|
|
|
|
|
#ifndef _PEN_H
|
|
#define _PEN_H
|
|
|
|
|
|
|
|
/*****************************************************************************/
|
|
/* Declarations */
|
|
/*****************************************************************************/
|
|
|
|
|
|
|
|
/* A program optionally can set this pointer to a function that gives
|
|
** a calibration value to a driver. If this pointer isn't NULL,
|
|
** then a driver that wants a value can call that function.
|
|
** pen_adjuster must be set before the driver is installed.
|
|
*/
|
|
extern void __fastcall__ (*pen_adjuster) (unsigned char *pValue);
|
|
|
|
|
|
|
|
/*****************************************************************************/
|
|
/* Functions */
|
|
/*****************************************************************************/
|
|
|
|
|
|
|
|
void __fastcall__ pen_calibrate (unsigned char *XOffset);
|
|
/* Ask the user to help to calibrate a lightpen. Changes the screen!
|
|
* A pointer to this function can be put into pen_adjuster.
|
|
*/
|
|
|
|
void __fastcall__ pen_adjust (const char *filename);
|
|
/* Get a lightpen calibration value from a file if it exists. Otherwise, call
|
|
* pen_calibrate() to create a value; then, write it into a file, so that it
|
|
* will be available at the next time that the lightpen is used.
|
|
* Might change the screen.
|
|
* pen_adjust() is optional; if you want to use its feature,
|
|
* then it must be called before a driver is installed.
|
|
* Note: This function merely saves the file-name pointer, and sets
|
|
* the pen_adjuster pointer. The file will be read only when a driver
|
|
* is installed, and only if that driver wants to be calibrated.
|
|
*/
|
|
|
|
|
|
|
|
/* End of pen.h */
|
|
#endif
|
|
|
|
|
|
|