/* * 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. */ #include #include #include #include "dlog.h" #include "ps2.h" #include "int10vga.h" #include "int2fwin.h" #include "int33.h" #include "vbox.h" #include "vmware.h" #include "dostsr.h" #define MSB_MASK 0x8000U TSRDATA data; static const uint16_t default_cursor_graphic[] = { 0x3FFF, 0x1FFF, 0x0FFF, 0x07FF, 0x03FF, 0x01FF, 0x00FF, 0x007F, 0x003F, 0x001F, 0x01FF, 0x00FF, 0x30FF, 0xF87F, 0xF87F, 0xFCFF, 0x0000, 0x4000, 0x6000, 0x7000, 0x7800, 0x7C00, 0x7E00, 0x7F00, 0x7F80, 0x7C00, 0x6C00, 0x4600, 0x0600, 0x0300, 0x0300, 0x0000 }; /** Constraint current mouse position to the user-set window. */ static void bound_position_to_window(void) { if (data.pos.x < data.min.x) data.pos.x = data.min.x; if (data.pos.x > data.max.x) data.pos.x = data.max.x; if (data.pos.y < data.min.y) data.pos.y = data.min.y; if (data.pos.y > data.max.y) data.pos.y = data.max.y; } static void hide_text_cursor(void) { // Restore the character under the old position of the cursor uint16_t __far *ch = get_video_char(&data.video_mode, data.cursor_pos.x / 8, data.cursor_pos.y / 8); *ch = data.cursor_prev_char; data.cursor_visible = false; } static void show_text_cursor(void) { uint16_t __far *ch = get_video_char(&data.video_mode, data.pos.x / 8, data.pos.y / 8); data.cursor_prev_char = *ch; data.cursor_pos = data.pos; *ch = (*ch & data.cursor_text_and_mask) ^ data.cursor_text_xor_mask; data.cursor_visible = true; } /** Given the new position of the cursor, compute the both our source * (i.e. the mouse cursor shape) and target clipping areas. * @param cursor_pos cursor position * @param start top left corner of clipping box in screen * @param size size of the clipping box in screen as well as cursor shape * @param offset top left corner of clipping box in mouse cursor shape */ static bool get_graphic_cursor_area(struct point __far *cursor_pos, struct point __far *start, struct point __far *size, struct point __far *offset) { start->x = (cursor_pos->x / data.screen_scale.x) - data.cursor_hotspot.x; start->y = (cursor_pos->y / data.screen_scale.y) - data.cursor_hotspot.y; size->x = GRAPHIC_CURSOR_WIDTH; size->y = GRAPHIC_CURSOR_HEIGHT; offset->x = 0; offset->y = 0; // Start clipping around // Cursor is left/top of visible area if (start->x <= -size->x) { return false; } else if (start->x < 0) { offset->x += -start->x; size->x -= -start->x; start->x = 0; } if (start->y <= -size->y) { return false; } else if (start->y < 0) { offset->y += -start->y; size->y -= -start->y; start->y = 0; } // Cursor is right/bottom of visible area if (start->x > data.video_mode.pixels_width) { return false; // Don't render cursor } else if (start->x + size->x > data.video_mode.pixels_width) { size->x -= (start->x + size->x) - data.video_mode.pixels_width; } if (start->y > data.video_mode.pixels_height) { return false; } else if (start->y + size->y > data.video_mode.pixels_height) { size->y -= (start->y + size->y) - data.video_mode.pixels_height; } return true; } static inline uint8_t * get_prev_graphic_cursor_scanline(unsigned bytes_per_line, unsigned num_lines, unsigned plane, unsigned y) { return &data.cursor_prev_graphic[((plane * num_lines) + y) * bytes_per_line]; } static inline uint16_t get_graphic_cursor_and_mask_line(unsigned y) { return data.cursor_graphic[y]; } static inline uint16_t get_graphic_cursor_xor_mask_line(unsigned y) { return data.cursor_graphic[GRAPHIC_CURSOR_HEIGHT + y]; } /** Compute the total number of bytes between start and end pixels, * rounding up as necessary to cover all bytes. */ static inline unsigned get_scanline_segment_bytes(unsigned bits_per_pixel, unsigned start, unsigned size) { // Get starting byte (round down) unsigned start_byte = (start * bits_per_pixel) / 8; // Get end byte (round up) unsigned end_byte = (((start + size) * bits_per_pixel) + (8-1)) / 8; return end_byte - start_byte; } /** Creates a bitmask that extracts the topmost N bits of a byte. */ static inline uint8_t build_pixel_mask(unsigned bits_per_pixel) { if (bits_per_pixel == 1) return 0x80; else if (bits_per_pixel == 2) return 0xC0; else if (bits_per_pixel == 4) return 0xF0; else return 0xFF; } /** Hides the graphical mouse cursor, by restoring the contents of * data.cursor_prev_graphic (i.e. what was below the cursor before we drew it) * to video memory. */ static void hide_graphic_cursor(void) { struct modeinfo *info = &data.video_mode; struct point start, size, offset; unsigned cursor_bytes_per_line; unsigned plane, y; // Compute the area where the cursor is currently positioned if (!get_graphic_cursor_area(&data.cursor_pos, &start, &size, &offset)) { return; } // For each scanline, we will copy this amount of bytes cursor_bytes_per_line = get_scanline_segment_bytes(info->bits_per_pixel, start.x, size.x); for (plane = 0; plane < info->num_planes; plane++) { if (info->num_planes > 1) vga_select_plane(plane); for (y = 0; y < size.y; y++) { uint8_t __far *line = get_video_scanline(info, start.y + y) + (start.x * info->bits_per_pixel) / 8; uint8_t *prev = get_prev_graphic_cursor_scanline(cursor_bytes_per_line, size.y, plane, y); // Restore this scaline from cursor_prev _fmemcpy(line, prev, cursor_bytes_per_line); } } data.cursor_visible = false; } /** Renders the graphical cursor. * It will also backup whatever pixels are below * the cursor area to cursor_prev_graphic. */ static void show_graphic_cursor(void) { const struct modeinfo *info = &data.video_mode; struct point start, size, offset; unsigned cursor_bytes_per_line; const uint8_t msb_pixel_mask = build_pixel_mask(info->bits_per_pixel); unsigned plane, y; // Compute the area where the cursor is supposed to be drawn if (!get_graphic_cursor_area(&data.pos, &start, &size, &offset)) { return; } // For each scanline, we will copy this amount of bytes cursor_bytes_per_line = get_scanline_segment_bytes(info->bits_per_pixel, start.x, size.x); for (plane = 0; plane < info->num_planes; plane++) { if (info->num_planes > 1) vga_select_plane(plane); for (y = 0; y < size.y; y++) { uint8_t __far *line = get_video_scanline(info, start.y + y) + (start.x * info->bits_per_pixel) / 8; uint8_t *prev = get_prev_graphic_cursor_scanline(cursor_bytes_per_line, size.y, plane, y); uint16_t cursor_and_mask = get_graphic_cursor_and_mask_line(offset.y + y) << offset.x; uint16_t cursor_xor_mask = get_graphic_cursor_xor_mask_line(offset.y + y) << offset.x; unsigned x; // First, backup this scanline to prev before any changes _fmemcpy(prev, line, cursor_bytes_per_line); if (info->bits_per_pixel < 8) { uint8_t pixel_mask = msb_pixel_mask; uint8_t pixel = *line; // when start.x is not pixel aligned, // scaline points the previous multiple of pixels_per_byte; // and the initial pixel will not be at the MSB of it. // advance the pixel_mask accordingly pixel_mask >>= (start.x * info->bits_per_pixel) % 8; for (x = 0; x < size.x; x++) { // The MSBs of each mask correspond to the current pixel if (!(cursor_and_mask & MSB_MASK)) { pixel &= ~pixel_mask; } if (cursor_xor_mask & MSB_MASK) { pixel ^= pixel_mask; } // Advance to the next pixel pixel_mask >>= info->bits_per_pixel; if (!pixel_mask) { // Time to advance to the next byte *line = pixel; // Save current byte first pixel = *(++line); pixel_mask = msb_pixel_mask; } // Advance to the next bit in the cursor mask cursor_and_mask <<= 1; cursor_xor_mask <<= 1; } if (pixel_mask != msb_pixel_mask) { // We ended up in the middle of a byte, save it *line = pixel; } } else if (info->bits_per_pixel == 8) { // Simplified version for byte-aligned pixels for (x = 0; x < size.x; x++) { uint8_t pixel = 0; if (cursor_and_mask & MSB_MASK) { pixel = *line; } if (cursor_xor_mask & MSB_MASK) { pixel ^= 0x0F; // Use 0x0F as "white pixel" } // Advance to the next pixel *line = pixel; ++line; // Advance to the next bit in the cursor mask cursor_and_mask <<= 1; cursor_xor_mask <<= 1; } } } } data.cursor_pos = data.pos; data.cursor_visible = true; } /** Refreshes cursor position and visibility. */ static void refresh_cursor(void) { bool should_show = data.visible_count >= 0; bool pos_changed, needs_refresh; #if USE_WIN386 // Windows 386 is already rendering the cursor for us. // Hide our own. if (data.w386cursor) should_show = false; #endif #if USE_VIRTUALBOX if (data.vbavail && data.vbwantcursor) { // We want to use the VirtualBox host cursor. // See if we have to update its visibility. int err = 0; if (should_show != data.cursor_visible) { err = vbox_set_pointer_visible(&data.vb, should_show); if (err == 0 && data.vbhaveabs) { data.cursor_visible = should_show; } } if (err == 0 && data.vbhaveabs) { // No need to refresh the cursor; VirtualBox is already showing it for us. return; } } #endif pos_changed = data.cursor_pos.x != data.pos.x || data.cursor_pos.y != data.pos.y; needs_refresh = should_show && pos_changed || should_show != data.cursor_visible; if (!needs_refresh) { // Nothing to do return; } if (data.video_mode.type == VIDEO_TEXT) { // Text video mode if (data.cursor_visible) { // Hide the cursor at the old position if any hide_text_cursor(); } if (should_show) { // Show the cursor at the new position show_text_cursor(); } } else if (data.video_mode.type != VIDEO_UNKNOWN) { // Graphic video modes bool video_planar = data.video_mode.num_planes > 1; struct videoregs regs; // If current video mode is planar, // we will have to play with the VGA registers // so let's save and restore them. if (video_planar) { vga_save_registers(®s); vga_set_graphics_mode(®s, 0, 0); } if (data.cursor_visible) { hide_graphic_cursor(); } if (should_show) { show_graphic_cursor(); } if (video_planar) { vga_restore_register(®s); } } else { // Unknown video mode, don't render cursor. } } /** Forcefully hides the mouse cursor if shown. */ static void hide_cursor(void) { #if USE_VIRTUALBOX if (data.vbavail && data.vbwantcursor) { vbox_set_pointer_visible(&data.vb, false); if (data.vbhaveabs) { data.cursor_visible = false; } } #endif if (data.cursor_visible) { if (data.video_mode.type == VIDEO_TEXT) { hide_text_cursor(); } else if (data.video_mode.type != VIDEO_UNKNOWN) { hide_graphic_cursor(); } } } /** Loads the current graphic cursor, * which in this case means uploading it to the host. */ static void load_cursor(void) { #if USE_VIRTUALBOX if (data.vbavail && data.vbwantcursor) { VMMDevReqMousePointer *req = (VMMDevReqMousePointer *) data.vb.buf; const unsigned width = GRAPHIC_CURSOR_WIDTH, height = GRAPHIC_CURSOR_HEIGHT; uint8_t *output = req->pointerData; unsigned int y, x; memset(req, 0, sizeof(VMMDevReqMousePointer)); req->header.size = vbox_req_mouse_pointer_size(width, height); req->header.version = VMMDEV_REQUEST_HEADER_VERSION; req->header.requestType = VMMDevReq_SetPointerShape; req->header.rc = -1; req->fFlags = VBOX_MOUSE_POINTER_SHAPE; req->xHot = BOUND(data.cursor_hotspot.x, 0, width); req->yHot = BOUND(data.cursor_hotspot.y, 0, height); req->width = width; req->height = height; // AND mask // int33 format is 1-bit per pixel packed into 16-bit LE values, // while VirtualBox wants 1-bit per pixel packed into 8-bit. // All we have to do is byteswap 16-bit values. for (y = 0; y < height; ++y) { uint16_t cursor_line = get_graphic_cursor_and_mask_line(y); output[0] = (cursor_line >> 8) & 0xFF; output[1] = cursor_line & 0xFF; output += GRAPHIC_CURSOR_SCANLINE_LEN; } // XOR mask // int33 format is again 1-bit per pixel packed into 16-bit LE values, // however VirtualBox wants 4-byte per pixel packed "RGBA". for (y = 0; y < height; ++y) { uint16_t cursor_line = get_graphic_cursor_xor_mask_line(y); for (x = 0; x < width; ++x) { // MSB of line is current mask bit, we shift it on each iteration uint8_t val = (cursor_line & MSB_MASK) ? 0xFF : 0; output[0] = val; output[1] = val; output[2] = val; output[3] = 0; cursor_line <<= 1; output += 4; } } dlog_puts("Loading cursor to VBox"); vbox_send_request(data.vb.iobase, data.vb.dds.physicalAddress); if (req->header.rc != 0) { dlog_puts("Could not send cursor to VirtualBox"); return; } // After we send this message, it looks like VirtualBox shows the cursor // even if we didn't actually want it to be visible at this point. vbox_set_pointer_visible(&data.vb, false); } #endif } /** Reloads the information about the current video mode. */ static void reload_video_info(void) { get_current_video_mode_info(&data.video_mode); data.screen_max.x = data.video_mode.pixels_width - 1; data.screen_max.y = data.video_mode.pixels_height - 1; data.screen_scale.x = 1; data.screen_scale.y = 1; // The actual range of coordinates expected by int33 clients // is, for some reason, different than real resolution in some modes. // For example, 320x... modes are mapped to 640x... pixels. if (data.video_mode.pixels_width == 320) { data.screen_max.x = 640 - 1; data.screen_scale.x = 640 / 320; } dlog_print("Current video mode="); dlog_printx(data.video_mode.mode); dlog_print(" screen_max="); dlog_printd(data.screen_max.x); dlog_putc(','); dlog_printd(data.screen_max.y); dlog_endline(); } /** True if the current video is different from what we have stored * and we probably need to recompute video mode info. */ static inline bool video_mode_changed(void) { uint8_t cur_mode = bda_get_video_mode() & ~0x80; if (cur_mode != data.video_mode.mode) return true; if (data.video_mode.type == VIDEO_TEXT) { // Also check to see if the font size was changed.. return data.video_mode.pixels_height != (bda_get_last_row()+1) * 8; } else { return false; } } /** Checks if the video mode has changed and if so * refreshes the information about the current video mode. */ static void refresh_video_info(void) { if (video_mode_changed()) { if (data.cursor_visible) { // Assume cursor is lost with no way to restore prev contents data.cursor_visible = false; } reload_video_info(); if (data.video_mode.type != VIDEO_UNKNOWN) { // If we know the screen size for this mode, then reset the window to it data.min.x = 0; data.min.y = 0; data.max.x = data.screen_max.x; data.max.y = data.screen_max.y; } } } /** Calls the application-registered event handler. */ static void call_event_handler(void (__far *handler)(), uint16_t events, uint16_t buttons, int16_t x, int16_t y, int16_t delta_x, int16_t delta_y) { #if TRACE_EVENTS dlog_print("calling event handler events="); dlog_printx(events); dlog_print(" buttons="); dlog_printx(buttons); dlog_print(" x="); dlog_printd(x); dlog_print(" y="); dlog_printd(y); dlog_print(" dx="); dlog_printd(delta_x); dlog_print(" dy="); dlog_printd(delta_y); dlog_endline(); #endif __asm { mov ax, [events] mov bx, [buttons] mov cx, [x] mov dx, [y] mov si, [delta_x] mov di, [delta_y] call dword ptr [handler] } } /** Process a mouse event internally. * @param buttons currently pressed buttons as a bitfield * @param absolute whether mouse coordinates are an absolute value * @param x y if absolute, then absolute coordinates in screen pixels * if relative, then relative coordinates in mickeys * @param z relative wheel mouse movement */ static void handle_mouse_event(uint16_t buttons, bool absolute, int x, int y, int z) { uint16_t events = 0; int i; #if TRACE_EVENTS dlog_print("handle mouse event"); if (absolute) dlog_print(" absolute"); dlog_print(" buttons="); dlog_printx(buttons); dlog_print(" x="); dlog_printd(x); dlog_print(" y="); dlog_printd(y); dlog_print(" z="); dlog_printd(z); dlog_endline(); #endif if (absolute) { // Absolute movement: x,y are in screen pixels units events |= INT33_EVENT_MASK_ABSOLUTE; if (x != data.pos.x || y != data.pos.y) { events |= INT33_EVENT_MASK_MOVEMENT; // Simulate a fake relative movement in mickeys // This is almost certainly broken. // Programs that expect relative movement data // will almost never set a mickeyPerPixel value. // So all we can do is guess. if (data.abs_pos.x >= 0 && data.abs_pos.y >= 0) { data.delta.x += (x - data.abs_pos.x) * 8; data.delta.y += (y - data.abs_pos.y) * 8; } data.abs_pos.x = x; data.abs_pos.y = y; // Set the new absolute position data.pos.x = x; data.pos.y = y; data.pos_frac.x = 0; data.pos_frac.y = 0; } } else if (x || y) { // Relative movement: x,y are in mickeys uint16_t ticks = bda_get_tick_count_lo(); unsigned ax = abs(x), ay = abs(y); events |= INT33_EVENT_MASK_MOVEMENT; // Check if around one second has passed if ((ticks - data.last_ticks) >= 18) { data.total_motion = 0; data.last_ticks = ticks; } // If more than the double speed threshold has been moved in the last second, // double the speed data.total_motion += ax * ax + ay * ay; if (data.total_motion > data.doubleSpeedThreshold * data.doubleSpeedThreshold) { x *= 2; y *= 2; } data.delta.x += x; data.delta.y += y; data.delta_frac.x = 0; data.delta_frac.y = 0; data.abs_pos.x = -1; data.abs_pos.y = -1; // Convert mickeys into pixels data.pos.x += scalei_rem(x, data.mickeysPerLine.x, 8, &data.pos_frac.x); data.pos.y += scalei_rem(y, data.mickeysPerLine.y, 8, &data.pos_frac.y); } bound_position_to_window(); if (data.haswheel && z) { events |= INT33_EVENT_MASK_WHEEL_MOVEMENT; // Higher byte of buttons contains wheel movement buttons |= (z & 0xFF) << 8; } // Update button status for (i = 0; i < NUM_BUTTONS; ++i) { uint8_t btn = 1 << i; uint8_t evt = 0; if ((buttons & btn) && !(data.buttons & btn)) { // Button pressed evt = 1 << (1 + (i * 2)); // Press event mask data.button[i].pressed.count++; data.button[i].pressed.last.x = data.pos.x; data.button[i].pressed.last.y = data.pos.y; } else if (!(buttons & btn) && (data.buttons & btn)) { // Button released evt = 1 << (2 + (i * 2)); // Release event mask data.button[i].released.count++; data.button[i].released.last.x = data.pos.x; data.button[i].released.last.y = data.pos.y; } events |= evt; } data.buttons = buttons; refresh_cursor(); events &= data.event_mask; if (data.event_handler && events) { call_event_handler(data.event_handler, events, buttons, data.pos.x, data.pos.y, data.delta.x, data.delta.y); } } /** PS/2 BIOS calls this routine to notify mouse events. */ static void ps2_mouse_handler(uint16_t word1, uint16_t word2, uint16_t word3, uint16_t word4) { #pragma aux ps2_mouse_handler "*" parm caller [ax] [bx] [cx] [dx] modify [ax bx cx dx si di es fs gs] unsigned status; int x, y, z; bool abs = false; #if TRACE_EVENTS dlog_print("ps2 callback "); dlog_printx(word1); dlog_putc(' '); dlog_printx(word2); dlog_putc(' '); dlog_printx(word3); dlog_putc(' '); dlog_printx(word4); dlog_endline(); #endif /* TRACE_EVENTS */ // Decode the PS2 event args // In a normal IBM PS/2 BIOS (incl. VirtualBox/Bochs/qemu/SeaBIOS): // word1 low byte = status (following PS2M_STATUS_*) // word2 low byte = x // word3 low byte = y // word4 = always zero // In a PS/2 BIOS with wheel support (incl. VMware/DOSBox-X): // taken from CuteMouse/KoKo: // word1 high byte = x // word1 low byte = status // word2 low byte = y // word3 low byte = z // word4 = always zero // VirtualBox/Bochs/qemu/SeaBIOS behave like a normal one, // but they also store the raw contents of all mouse packets in the EBDA (starting 0x28 = packet 0). // Other BIOSes don't do that so it is not a reliable option either. // So, how to detect which BIOS we have? // For now we are always assuming "normal" PS/2 BIOS. // But with VirtualBox integration on we'll get the wheel packet from the EBDA, // and with VMWare integration on we'll get it from the VMware protocol. status = (uint8_t) word1; x = (uint8_t) word2; y = (uint8_t) word3; z = 0; (void) word4; // Sign-extend X, Y as per the status byte x = status & PS2M_STATUS_X_NEG ? 0xFF00 | x : x; y = -(status & PS2M_STATUS_Y_NEG ? 0xFF00 | y : y); #if USE_VIRTUALBOX if (data.vbavail) { uint16_t vbx, vby; if ((vbox_get_mouse(&data.vb, &abs, &vbx, &vby) == 0) && abs) { // VirtualBox gives unsigned coordinates from 0...0xFFFFU, // scale to 0..screen_size (in pixels). refresh_video_info(); // If the user is using a window larger than the screen, use it. x = scaleu(vbx, 0xFFFFU, MAX(data.max.x, data.screen_max.x)); y = scaleu(vby, 0xFFFFU, MAX(data.max.y, data.screen_max.y)); data.vbhaveabs = true; } else { // VirtualBox does not support absolute coordinates, // or user has disabled them. data.vbhaveabs = false; // Rely on PS/2 relative coordinates. } // VirtualBox/Bochs BIOS does not pass wheel data to the callback, // so we will fetch it directly from the BIOS data segment. if (data.haswheel) { int8_t __far * mouse_packet = MK_FP(bda_get_ebda_segment(), 0x28); z = mouse_packet[3]; } } #endif /* USE_VIRTUALBOX */ #if USE_VMWARE if (data.vmwavail) { uint32_t vmwstatus = vmware_abspointer_status(); uint16_t data_avail = vmwstatus & VMWARE_ABSPOINTER_STATUS_MASK_DATA; #if TRACE_EVENTS dlog_print("vmware status=0x"); dlog_printx(vmwstatus >> 16); dlog_print(" "); dlog_printx(vmwstatus & 0xFFFF); dlog_endline(); #endif if (data_avail >= VMWARE_ABSPOINTER_DATA_PACKET_SIZE) { struct vmware_abspointer_data vmw; vmware_abspointer_data(VMWARE_ABSPOINTER_DATA_PACKET_SIZE, &vmw); #if TRACE_EVENTS dlog_print("vmware pstatus=0x"); dlog_printx(status); dlog_print(" x=0x"); dlog_printx(vmw.x); dlog_print(" z="); dlog_printd((int8_t) (uint8_t) vmw.z); dlog_endline(); #endif if (vmw.status & VMWARE_ABSPOINTER_STATUS_RELATIVE) { x = (int16_t) vmw.x; y = (int16_t) vmw.y; z = (int8_t) (uint8_t) vmw.z; } else { abs = true; // Scale to screen coordinates refresh_video_info(); x = scaleu(vmw.x & 0xFFFFU, 0xFFFFU, MAX(data.max.x, data.screen_max.x)); y = scaleu(vmw.y & 0xFFFFU, 0xFFFFU, MAX(data.max.y, data.screen_max.y)); z = (int8_t) (uint8_t) vmw.z; } if (vmw.status & VMWARE_ABSPOINTER_STATUS_BUTTON_LEFT) { status |= PS2M_STATUS_BUTTON_1; } if (vmw.status & VMWARE_ABSPOINTER_STATUS_BUTTON_RIGHT) { status |= PS2M_STATUS_BUTTON_2; } if (vmw.status & VMWARE_ABSPOINTER_STATUS_BUTTON_MIDDLE) { status |= PS2M_STATUS_BUTTON_3; } } else { return; // Ignore the PS/2 packet otherwise, it is likely garbage } } #endif /* USE_VMWARE */ handle_mouse_event(status & (PS2M_STATUS_BUTTON_1 | PS2M_STATUS_BUTTON_2 | PS2M_STATUS_BUTTON_3), abs, x, y, z); } void __declspec(naked) __far ps2_mouse_callback() { __asm { pusha push ds push es push fs push gs ; 8 + 4 saved registers, 24 bytes ; plus 4 bytes for retf address ; = 28 bytes of stack before callback args mov bp, sp push cs pop ds mov ax,[bp+28+6] ; Status mov bx,[bp+28+4] ; X mov cx,[bp+28+2] ; Y mov dx,[bp+28+0] ; Z call ps2_mouse_handler pop gs pop fs pop es pop ds popa retf } } #if USE_INTEGRATION static void set_absolute(bool enable) { #if USE_VIRTUALBOX data.vbhaveabs = false; if (data.vbavail) { int err = vbox_set_mouse(&data.vb, enable, false); if (enable && !err) { dlog_puts("VBox absolute mouse enabled"); data.vbhaveabs = true; } else if (!enable) { dlog_puts("VBox absolute mouse disabled"); } } #endif /* USE_VIRTUALBOX */ #if USE_VMWARE if (data.vmwavail) { if (enable) { uint16_t data_avail; // It looks like a reset of the PS/2 mouse completely disables // the vmware interface, so we have to reenable it from scratch. vmware_abspointer_cmd(VMWARE_ABSPOINTER_CMD_ENABLE); vmware_abspointer_data_clear(); vmware_abspointer_cmd(VMWARE_ABSPOINTER_CMD_REQUEST_ABSOLUTE); dlog_puts("VMware absolute mouse enabled"); } else { vmware_abspointer_cmd(VMWARE_ABSPOINTER_CMD_REQUEST_RELATIVE); vmware_abspointer_cmd(VMWARE_ABSPOINTER_CMD_DISABLE); dlog_puts("VMware absolute mouse disabled"); } } #endif /* USE_VMWARE */ } #endif /* USE_INTEGRATION */ static void reset_mouse_hardware() { ps2m_enable(false); #if USE_WHEEL if (data.usewheel && ps2m_detect_wheel()) { // Detect wheel also reinitializes the mouse to the proper packet size data.haswheel = true; } else { // Otherwise do an extra reset to return back to initial state, just in case data.haswheel = false; ps2m_init(PS2M_PACKET_SIZE_PLAIN); } #else data.haswheel = false; ps2m_init(PS2M_PACKET_SIZE_PLAIN); #endif ps2m_set_resolution(3); // 3 = 200 dpi, 8 counts per millimeter ps2m_set_sample_rate(4); // 4 = 80 reports per second ps2m_set_scaling_factor(1); // 1 = 1:1 scaling ps2m_set_callback(get_cs():>ps2_mouse_callback); #if USE_INTEGRATION // By default, enable absolute mouse set_absolute(true); // Reload hardware cursor load_cursor(); #endif ps2m_enable(true); } /** Reset "software" mouse settings, i.e. those configurable by the client program. */ static void reset_mouse_settings() { data.event_mask = 0; data.event_handler = 0; data.mickeysPerLine.x = 8; data.mickeysPerLine.y = 16; data.doubleSpeedThreshold = 64; data.min.x = 0; data.max.x = data.screen_max.x; data.min.y = 0; data.max.y = data.screen_max.y; data.visible_count = -1; data.cursor_text_type = 0; data.cursor_text_and_mask = 0xFFFFU; data.cursor_text_xor_mask = 0x7700U; data.cursor_hotspot.x = 0; data.cursor_hotspot.y = 0; memcpy(data.cursor_graphic, default_cursor_graphic, sizeof(data.cursor_graphic)); refresh_cursor(); // This will hide the cursor and update data.cursor_visible } /** Reset the current mouse state and throw away past events. */ static void reset_mouse_state() { int i; data.pos.x = data.min.x; data.pos.y = data.min.y; data.pos_frac.x = 0; data.pos_frac.y = 0; data.delta.x = 0; data.delta.y = 0; data.delta_frac.x = 0; data.delta_frac.y = 0; data.abs_pos.x = -1; data.abs_pos.y = -1; data.buttons = 0; for (i = 0; i < NUM_BUTTONS; i++) { data.button[i].pressed.count = 0; data.button[i].pressed.last.x = 0; data.button[i].pressed.last.y = 0; data.button[i].released.count = 0; data.button[i].released.last.x = 0; data.button[i].released.last.y = 0; } data.wheel_delta = 0; data.cursor_visible = false; data.cursor_pos.x = 0; data.cursor_pos.y = 0; data.cursor_prev_char = 0; memset(data.cursor_prev_graphic, 0, sizeof(data.cursor_prev_graphic)); } static void return_clear_wheel_counter(union INTPACK __far *r) { r->x.cx = data.wheel_last.x; r->x.dx = data.wheel_last.y; r->x.bx = data.wheel_delta; data.wheel_last.x = 0; data.wheel_last.y = 0; data.wheel_delta = 0; } static void return_clear_button_counter(union INTPACK __far *r, struct buttoncounter *c) { r->x.cx = c->last.x; r->x.dx = c->last.y; r->x.bx = c->count; c->last.x = 0; c->last.y = 0; c->count = 0; } /** Entry point for our int33 API. */ static void int33_handler(union INTPACK r) #pragma aux int33_handler "*" parm caller [] modify [ax bx cx dx si di es fs gs] { switch (r.x.ax) { case INT33_RESET_MOUSE: dlog_puts("Mouse reset"); reload_video_info(); reset_mouse_settings(); reset_mouse_hardware(); reset_mouse_state(); r.x.ax = INT33_MOUSE_FOUND; r.x.bx = NUM_BUTTONS; break; case INT33_SHOW_CURSOR: data.visible_count++; refresh_cursor(); break; case INT33_HIDE_CURSOR: data.visible_count--; refresh_cursor(); break; case INT33_GET_MOUSE_POSITION: #if TRACE_EVENTS dlog_puts("Mouse get position"); #endif r.x.cx = data.pos.x; r.x.dx = data.pos.y; r.x.bx = data.buttons; if (data.haswheel) { r.h.bh = data.wheel_delta; data.wheel_delta = 0; } break; case INT33_SET_MOUSE_POSITION: #if TRACE_EVENTS dlog_puts("Mouse set position"); #endif data.pos.x = r.x.cx; data.pos.y = r.x.dx; data.pos_frac.x = 0; data.pos_frac.y = 0; data.delta.x = 0; data.delta.y = 0; data.delta_frac.x = 0; data.delta_frac.y = 0; bound_position_to_window(); break; case INT33_GET_BUTTON_PRESSED_COUNTER: r.x.ax = data.buttons; if (data.haswheel) { r.h.bh = data.wheel_delta; } if (data.haswheel && r.x.bx == -1) { // Wheel information return_clear_wheel_counter(&r); } else { // Regular button information int btn = MIN(r.x.bx, NUM_BUTTONS - 1); return_clear_button_counter(&r, &data.button[btn].pressed); } break; case INT33_GET_BUTTON_RELEASED_COUNTER: r.x.ax = data.buttons; if (data.haswheel) { r.h.bh = data.wheel_delta; } if (data.haswheel && r.x.bx == -1) { // Wheel information return_clear_wheel_counter(&r); } else { int btn = MIN(r.x.bx, NUM_BUTTONS - 1); return_clear_button_counter(&r, &data.button[btn].released); } break; case INT33_SET_HORIZONTAL_WINDOW: dlog_print("Mouse set horizontal window ["); dlog_printd(r.x.cx); dlog_putc(','); dlog_printd(r.x.dx); dlog_puts("]"); // Recheck in case someone changed the video mode refresh_video_info(); data.min.x = r.x.cx; data.max.x = r.x.dx; bound_position_to_window(); break; case INT33_SET_VERTICAL_WINDOW: dlog_print("Mouse set vertical window ["); dlog_printd(r.x.cx); dlog_putc(','); dlog_printd(r.x.dx); dlog_puts("]"); refresh_video_info(); data.min.y = r.x.cx; data.max.y = r.x.dx; bound_position_to_window(); break; case INT33_SET_GRAPHICS_CURSOR: dlog_puts("Mouse set graphics cursor"); hide_cursor(); data.cursor_hotspot.x = r.x.bx; data.cursor_hotspot.y = r.x.cx; _fmemcpy(data.cursor_graphic, MK_FP(r.x.es, r.x.dx), sizeof(data.cursor_graphic)); load_cursor(); refresh_cursor(); break; case INT33_SET_TEXT_CURSOR: dlog_print("Mouse set text cursor "); dlog_printd(r.x.bx); dlog_endline(); hide_cursor(); data.cursor_text_type = r.x.bx; data.cursor_text_and_mask = r.x.cx; data.cursor_text_xor_mask = r.x.dx; refresh_cursor(); break; case INT33_GET_MOUSE_MOTION: #if TRACE_EVENTS dlog_puts("Mouse get motion"); #endif r.x.cx = data.delta.x; r.x.dx = data.delta.y; data.delta.x = 0; data.delta.y = 0; break; case INT33_SET_EVENT_HANDLER: dlog_puts("Mouse set event handler"); data.event_mask = r.x.cx; data.event_handler = MK_FP(r.x.es, r.x.dx); break; case INT33_SET_MOUSE_SPEED: dlog_print("Mouse set speed x="); dlog_printd(r.x.cx); dlog_print(" y="); dlog_printd(r.x.dx); dlog_endline(); data.mickeysPerLine.x = r.x.cx; data.mickeysPerLine.y = r.x.dx; break; case INT33_SET_SPEED_DOUBLE_THRESHOLD: dlog_print("Mouse set speed double threshold="); dlog_printd(r.x.dx); dlog_endline(); data.doubleSpeedThreshold = r.x.dx; break; case INT33_EXCHANGE_EVENT_HANDLER: dlog_puts("Mouse exchange event handler"); data.event_mask = r.x.cx; { void (__far *prev_event_handler)() = data.event_handler; data.event_handler = MK_FP(r.x.es, r.x.dx); r.x.es = FP_SEG(prev_event_handler); r.x.dx = FP_OFF(prev_event_handler); } break; case INT33_GET_MOUSE_STATUS_SIZE: dlog_puts("Mouse get status size"); r.x.bx = sizeof(TSRDATA); break; case INT33_SAVE_MOUSE_STATUS: dlog_puts("Mouse save status"); _fmemcpy(MK_FP(r.x.es, r.x.dx), &data, sizeof(TSRDATA)); break; case INT33_LOAD_MOUSE_STATUS: dlog_puts("Mouse load status"); _fmemcpy(&data, MK_FP(r.x.es, r.x.dx), sizeof(TSRDATA)); break; case INT33_SET_MOUSE_SENSITIVITY: dlog_print("Mouse set speed x="); dlog_printd(r.x.bx); dlog_print(" y="); dlog_printd(r.x.cx); dlog_print(" threshold="); dlog_printd(r.x.dx); dlog_endline(); data.mickeysPerLine.x = r.x.bx; data.mickeysPerLine.y = r.x.cx; data.doubleSpeedThreshold = r.x.dx; break; case INT33_GET_MOUSE_SENSITIVITY: r.x.bx = data.mickeysPerLine.x; r.x.cx = data.mickeysPerLine.y; r.x.dx = data.doubleSpeedThreshold; break; case INT33_RESET_SETTINGS: dlog_puts("Mouse reset settings"); reload_video_info(); reset_mouse_settings(); reset_mouse_state(); r.x.ax = INT33_MOUSE_FOUND; r.x.bx = NUM_BUTTONS; break; case INT33_GET_LANGUAGE: r.x.bx = 0; break; case INT33_GET_DRIVER_INFO: dlog_puts("Mouse get driver info"); r.h.bh = REPORTED_VERSION_MAJOR; r.h.bl = REPORTED_VERSION_MINOR; r.h.ch = INT33_MOUSE_TYPE_PS2; r.h.cl = 0; break; case INT33_GET_MAX_COORDINATES: r.x.bx = 0; r.x.cx = MAX(data.screen_max.x, data.max.x); r.x.dx = MAX(data.screen_max.y, data.max.y); break; case INT33_GET_WINDOW: r.x.ax = data.min.x; r.x.bx = data.min.y; r.x.cx = data.max.x; r.x.dx = data.max.y; break; #if USE_WHEEL // Wheel API extensions: case INT33_GET_CAPABILITIES: r.x.ax = INT33_WHEEL_API_MAGIC; // Driver supports wheel API r.x.bx = 0; r.x.cx = data.haswheel ? INT33_CAPABILITY_MOUSE_API : 0; break; #endif // Our internal API extensions: case INT33_GET_TSR_DATA: dlog_puts("Get TSR data"); r.x.es = FP_SEG(&data); r.x.di = FP_OFF(&data); break; default: dlog_print("Unknown mouse function ax="); dlog_printx(r.x.ax); dlog_endline(); break; } } // Can't use __interrupt, it makes a call to GETDS on the runtime void __declspec(naked) __far int33_isr(void) { __asm { pusha push ds push es push fs push gs mov bp, sp push cs pop ds call int33_handler pop gs pop fs pop es pop ds popa iret } } #if USE_WIN386 /** Windows will call this function to notify events when we are inside a DOS box. */ static void windows_mouse_handler(int action, int x, int y, int buttons, int events) #pragma aux windows_mouse_handler "*" parm [ax] [bx] [cx] [dx] [si] modify [ax bx cx dx es] { switch (action) { case VMD_ACTION_MOUSE_EVENT: (void) events; // Forward event to our internal system handle_mouse_event(buttons, true, x, y, 0); break; case VMD_ACTION_HIDE_CURSOR: dlog_puts("VMD_ACTION_HIDE_CURSOR"); data.w386cursor = true; refresh_cursor(); break; case VMD_ACTION_SHOW_CURSOR: dlog_puts("VMD_ACTION_SHOW_CURSOR"); data.w386cursor = false; refresh_cursor(); break; } } void __declspec(naked) __far windows_mouse_callback() { __asm { pusha push ds push es push fs push gs mov bp, sp push cs pop ds call windows_mouse_handler pop gs pop fs pop es pop ds popa retf } } static void int2f_handler(union INTPACK r) #pragma aux int2f_handler "*" parm caller [] modify [ax bx cx dx es] { switch (r.x.ax) { case INT2F_NOTIFY_WIN386_STARTUP: dlog_print("Windows is starting, version="); dlog_printx(r.x.di); dlog_endline(); data.w386_startup.version = 3; data.w386_startup.next = MK_FP(r.x.es, r.x.bx); data.w386_startup.device_driver = 0; data.w386_startup.device_driver_data = 0; data.w386_startup.instance_data = &data.w386_instance; data.w386_instance[0].ptr = &data; data.w386_instance[0].size = sizeof(data); data.w386_instance[1].ptr = 0; data.w386_instance[1].size = 0; r.x.es = FP_SEG(&data.w386_startup); r.x.bx = FP_OFF(&data.w386_startup); break; case INT2F_NOTIFY_DEVICE_CALLOUT: switch (r.x.bx) { case VMD_DEVICE_ID: switch (r.x.cx) { case VMD_CALLOUT_TEST: r.x.cx = 1; // Yes, we are here! break; case VMD_CALLOUT_GET_DOS_MOUSE_API: // Windows is asking our mouse driver for the hook function address r.x.ds = get_cs(); r.x.si = FP_OFF(windows_mouse_callback); r.x.ax = 0; // Yes, we are here! break; } break; } break; } } void __declspec(naked) __far int2f_isr(void) { __asm { pusha push ds push es push fs push gs mov bp, sp push cs pop ds call int2f_handler pop gs pop fs pop es pop ds popa ; Jump to the next handler in the chain jmp dword ptr cs:[data + 4] ; wasm doesn't support structs, this is data.prev_int2f_handler } } #endif static LPTSRDATA int33_get_tsr_data(void); #pragma aux int33_get_tsr_data = \ "xor ax, ax" \ "mov es, ax" \ "mov di, ax" \ "mov ax, 0x73" \ "int 0x33" \ __value [es di] \ __modify [ax] static LPTSRDATA local_get_tsr_data(void); #pragma aux local_get_tsr_data = \ "mov ax, cs" \ "mov es, ax" \ "mov di, offset data" \ __value [es di] \ __modify [ax] LPTSRDATA __far get_tsr_data(bool installed) { if (installed) { return int33_get_tsr_data(); } else { return local_get_tsr_data(); } } int resident_end;