dingusppc/devices/common/adb/adbmouse.cpp
Mihai Parparita ae0bb838bf Add basic support for the extended ADB mouse protocol.
We now respond to the switch to device handler ID 4 and the register 1
read (as described by https://developer.apple.com/library/archive/technotes/hw/hw_01.html#Extended).

We don't yet use the extra precision bits in the register 0.
2023-12-15 16:04:27 -08:00

138 lines
4.0 KiB
C++

/*
DingusPPC - The Experimental PowerPC Macintosh emulator
Copyright (C) 2018-23 divingkatae and maximum
(theweirdo) spatium
(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
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 3 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, see <https://www.gnu.org/licenses/>.
*/
/** @file Apple Desktop Bus Mouse emulation. */
#include <devices/common/adb/adbmouse.h>
#include <devices/common/adb/adbbus.h>
#include <devices/deviceregistry.h>
#include <core/hostevents.h>
#include <loguru.hpp>
AdbMouse::AdbMouse(std::string name) : AdbDevice(name) {
EventManager::get_instance()->add_mouse_handler(this, &AdbMouse::event_handler);
this->reset();
}
void AdbMouse::event_handler(const MouseEvent& event) {
if (event.flags & MOUSE_EVENT_MOTION) {
this->x_rel += event.xrel;
this->y_rel += event.yrel;
} else if (event.flags & MOUSE_EVENT_BUTTON) {
this->buttons_state = event.buttons_state;
this->changed = true;
}
}
void AdbMouse::reset() {
this->my_addr = ADB_ADDR_RELPOS;
this->dev_handler_id = 1;
this->exc_event_flag = 1;
this->srq_flag = 1; // enable service requests
this->x_rel = 0;
this->y_rel = 0;
this->buttons_state = 0;
this->changed = false;
}
bool AdbMouse::get_register_0() {
if (this->x_rel || this->y_rel || this->changed) {
uint8_t* out_buf = this->host_obj->get_output_buf();
uint8_t button1_state = (this->buttons_state ^ 1) << 7;
// report Y-axis motion
if (this->y_rel < -64)
out_buf[0] = 0x40 | button1_state;
else if (this->y_rel > 63)
out_buf[0] = 0x3F | button1_state;
else
out_buf[0] = (this->y_rel & 0x7F) | button1_state;
// report X-axis motion
if (this->x_rel < -64)
out_buf[1] = 0x40 | 0x80;
else if (this->x_rel > 63)
out_buf[1] = 0x3F | 0x80;
else
out_buf[1] = (this->x_rel & 0x7F) | 0x80;
// reset accumulated motion data and button change flag
this->x_rel = 0;
this->y_rel = 0;
this->changed = false;
this->host_obj->set_output_count(2);
return true;
}
return false;
}
bool AdbMouse::get_register_1() {
uint8_t* out_buf = this->host_obj->get_output_buf();
// Identifier
out_buf[0] = 'a';
out_buf[1] = 'p';
out_buf[2] = 'p';
out_buf[3] = 'l';
// Slightly higher resolution of 300 units per inch
out_buf[4] = 300 >> 8;
out_buf[5] = 300 & 0xFF;
out_buf[6] = 1; // mouse
out_buf[7] = 1; // 1 button
this->host_obj->set_output_count(8);
return true;
}
void AdbMouse::set_register_3() {
if (this->host_obj->get_input_count() < 2) // ensure we got enough data
return;
const uint8_t* in_data = this->host_obj->get_input_buf();
switch (in_data[1]) {
case 0:
this->my_addr = in_data[0] & 0xF;
this->srq_flag = !!(in_data[0] & 0x20);
break;
case 1:
case 2:
case 4: // switch over to extended mouse protocol
this->dev_handler_id = in_data[1];
break;
case 0xFE: // move to a new address if there was no collision
if (!this->got_collision) {
this->my_addr = in_data[0] & 0xF;
}
break;
default:
LOG_F(WARNING, "%s: unknown handler ID = 0x%X", this->name.c_str(), in_data[1]);
}
}
static const DeviceDescription AdbMouse_Descriptor = {
AdbMouse::create, {}, {}
};
REGISTER_DEVICE(AdbMouse, AdbMouse_Descriptor);