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/*
* VBMouse - DOS mouse driver resident part
* Copyright (C) 2022 Javier S. Pedro
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef DOSTSR_H
#define DOSTSR_H
#include <stdbool.h>
#include <stdint.h>
#include "vbox.h"
#include "int2fwin.h"
#define USE_VIRTUALBOX 1
#define USE_INT2F 1
#define TRACE_EVENTS 0
#define NUM_BUTTONS 3
#define GRAPHIC_CURSOR_WIDTH 16
#define GRAPHIC_CURSOR_HEIGHT 16
#define VERSION_MAJOR 0
#define VERSION_MINOR 3
#define REPORTED_VERSION_MAJOR 8
#define REPORTED_VERSION_MINOR 0x20
struct point {
int16_t x, y;
};
typedef struct tsrdata {
// TSR installation data
/** Previous int33 ISR, storing it for uninstall. */
void (__interrupt __far *prev_int33_handler)();
#if USE_INT2F
void (__interrupt __far *prev_int2f_handler)();
#endif
/** Whether to enable & use wheel mouse. */
bool usewheel;
// Video settings
/** Current video mode. */
uint8_t screen_mode;
/** Active video page. */
uint8_t screen_page;
/** Max (virtual) coordinates of full screen in the current mode.
* Used for rendering graphic cursor, mapping absolute coordinates,
* and initializing the default min/max window. */
struct point screen_max;
/** Some graphic modes have pixel doubling, so the virtual coordinates
* are double vs real framebuffer coordinates. */
struct point screen_scale;
// Detected mouse hardware
/** Whether the current mouse has a wheel (and support is enabled). */
bool haswheel;
// Current mouse settings
/** Mouse sensitivity/speed. */
struct point mickeysPerLine; // mickeys per 8 pixels
/** Mouse acceleration "double-speed threshold". */
uint16_t doubleSpeedThreshold; // mickeys
/** Current window min coordinates. */
struct point min;
/** Current window max coordinates. */
struct point max;
/** Current cursor visible counter. If >= 0, cursor should be shown. */
int16_t visible_count;
/** For text cursor, whether this is a software or hardware cursor. */
uint8_t cursor_text_type;
/** Masks for the text cursor. */
uint16_t cursor_text_and_mask, cursor_text_xor_mask;
/** Hotspot for the graphic cursor. */
struct point cursor_hotspot;
/** Masks for the graphic cursor. */
uint16_t cursor_graphic[GRAPHIC_CURSOR_HEIGHT*2];
// Current mouse status
/** Current cursor position (in pixels). */
struct point pos;
/** Current remainder of movement that does not yet translate to an entire pixel
* (8ths of pixel). */
struct point pos_frac;
/** Current delta movement (in mickeys) since the last report. */
struct point delta;
/** Current remainder of delta movement that does not yet translate to an entire mickey
* Usually only when mickeysPerLine is not a multiple of 8. */
struct point delta_frac;
/** Total mickeys moved in the last second. */
uint16_t total_motion;
/** Ticks when the above value was last reset. */
uint16_t last_ticks;
/** Current status of buttons (as bitfield). */
uint16_t buttons;
struct {
struct buttoncounter {
struct point last;
uint16_t count;
} pressed, released;
} button[NUM_BUTTONS];
/** Total delta movement of the wheel since the last wheel report. */
int16_t wheel_delta;
/** Last position where the wheel was moved. */
struct point wheel_last;
// Cursor information
/** Whether the cursor is currently displayed or not. */
bool cursor_visible;
/** The current position at which the cursor is displayed. */
struct point cursor_pos;
/** For text mode cursor, the character data that was displayed below the cursor. */
uint16_t cursor_prev_char;
/** For graphical mode cursor, contents of the screen that were displayed below
* the cursor before the cursor was drawn. */
uint8_t cursor_prev_graphic[GRAPHIC_CURSOR_WIDTH * GRAPHIC_CURSOR_HEIGHT];
// Current handlers
/** Address of the event handler. */
void (__far *event_handler)();
/** Events for which we should call the event handler. */
uint16_t event_mask;
#if USE_INT2F
/** Information that we pass to Windows 386 on startup. */
win386_startup_info w386_startup;
win386_instance_item w386_instance[2];
/** Whether Windows 386 is rendering the cursor for us,
* and therefore we should hide our own. */
bool w386cursor : 1;
#endif
#if USE_VIRTUALBOX
/** VirtualBox is available. */
bool vbavail : 1;
/** Want to use the VirtualBox "host" cursor. */
bool vbwantcursor : 1;
/** Have VirtualBox absolute coordinates. */
bool vbhaveabs : 1;
struct vboxcomm vb;
#endif
} TSRDATA;
typedef TSRDATA * PTSRDATA;
typedef TSRDATA __far * LPTSRDATA;
extern void __declspec(naked) __far int33_isr(void);
extern void __declspec(naked) __far int2f_isr(void);
extern LPTSRDATA __far get_tsr_data(bool installed);
/** This symbol is always at the end of the TSR segment */
extern int resident_end;
/** This is not just data, but the entire segment. */
static inline unsigned get_resident_size(void)
{
return FP_OFF(&resident_end);
}
#endif
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