initial import of DOS mouse driver

1 files changed, 110 insertions, 0 deletions

diff --git a/dostsr.h b/dostsr.h
new file mode 100644
index 0000000..c808709
--- /dev/null
+++ b/dostsr.h
@@ -0,0 +1,110 @@
+/*
+ * 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"
+
+#define USE_VIRTUALBOX 1
+
+#define NUM_BUTTONS 3
+
+#define DRIVER_VERSION_MAJOR 8
+#define DRIVER_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)();
+
+	// Video settings
+	uint8_t screen_mode;
+	uint8_t screen_page;
+	bool screen_text_mode;
+	struct point screen_max;
+
+	// Current mouse settings
+	struct point mickeysPerLine; // mickeys per 8 pixels
+	uint16_t doubleSpeedThreshold; // mickeys
+	struct point min;
+	struct point max;
+	int16_t visible_count;
+	uint8_t cursor_text_type;
+	uint16_t cursor_text_and_mask, cursor_text_xor_mask;
+	struct point cursor_hotspot;
+	uint16_t cursor_graphic[16+16];
+
+	// 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 right now). */
+	struct point pos_frac;
+	/** Current delta movement (in mickeys) since the last report. */
+	struct point delta;
+	/** 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];
+	/** Whether the cursor is currently displayed or not. */
+	bool cursor_visible;
+	struct point cursor_pos;
+	uint16_t cursor_prev_char;
+
+	// Current handlers
+	void (__far *event_handler)();
+	uint8_t event_mask;
+
+#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 LPTSRDATA __far get_tsr_data(bool installed);
+
+extern int resident_end;
+
+#endif