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https://github.com/SourMesen/Mesen.git
synced 2024-06-02 03:18:48 -04:00
c3b1b3effc
Fixed an edge case that occurred when setting strobe bit after reading $4016 once and then reading $4016 again
105 lines
2.7 KiB
C++
105 lines
2.7 KiB
C++
#pragma once
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#include "stdafx.h"
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#include "BaseControlDevice.h"
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#include "IKeyManager.h"
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#include "KeyManager.h"
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class SuborMouse : public BaseControlDevice
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{
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private:
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uint32_t _stateBuffer = 0;
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uint8_t _packetBytes[3] = {};
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uint8_t _packetPos = 0;
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uint8_t _packetSize = 1;
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protected:
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bool HasCoordinates() override { return true; }
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enum Buttons { Left = 0, Right };
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void StreamState(bool saving) override
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{
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BaseControlDevice::StreamState(saving);
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ArrayInfo<uint8_t> packetBytes { _packetBytes, 3 };
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Stream(_stateBuffer, _packetPos, _packetSize, packetBytes);
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}
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void InternalSetStateFromInput() override
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{
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SetPressedState(Buttons::Left, KeyManager::IsMouseButtonPressed(MouseButton::LeftButton));
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SetPressedState(Buttons::Right, KeyManager::IsMouseButtonPressed(MouseButton::RightButton));
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SetMovement(KeyManager::GetMouseMovement(_console->GetSettings()->GetMouseSensitivity(MouseDevice::SuborMouse)));
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}
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public:
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SuborMouse(shared_ptr<Console> console, uint8_t port) : BaseControlDevice(console, port)
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{
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}
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void WriteRAM(uint16_t addr, uint8_t value) override
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{
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StrobeProcessWrite(value);
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}
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uint8_t ReadRAM(uint16_t addr) override
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{
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uint8_t output = 0;
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if((addr == 0x4016 && (_port & 0x01) == 0) || (addr == 0x4017 && (_port & 0x01) == 1)) {
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StrobeProcessRead();
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output = (_stateBuffer & 0x80) >> 7;
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if(_port >= 2) {
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output <<= 1;
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}
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_stateBuffer <<= 1;
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}
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return output;
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}
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void RefreshStateBuffer() override
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{
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if(_packetPos < _packetSize - 1) {
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//3-byte packet is not done yet, move to next byte
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_packetPos++;
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_stateBuffer = _packetBytes[_packetPos];
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return;
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}
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MouseMovement mov = GetMovement();
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uint32_t upFlag = mov.dy < 0 ? 0x80 : 0;
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uint32_t leftFlag = mov.dx < 0 ? 0x80 : 0;
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mov.dx = std::min<int16_t>(std::abs(mov.dx), 31);
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mov.dy = std::min<int16_t>(std::abs(mov.dy), 31);
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if(mov.dx <= 1 && mov.dy <= 1) {
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//1-byte packet
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_packetBytes[0] =
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(IsPressed(SuborMouse::Buttons::Left) ? 0x80 : 0) |
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(IsPressed(SuborMouse::Buttons::Right) ? 0x40 : 0) |
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(leftFlag && mov.dx ? 0x30 : (mov.dx ? 0x10 : 0)) |
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(upFlag && mov.dy ? 0x0C : (mov.dy ? 0x04 : 0));
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_packetBytes[1] = 0;
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_packetBytes[2] = 0;
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_packetSize = 1;
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} else {
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//3-byte packet
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_packetBytes[0] =
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(IsPressed(SuborMouse::Buttons::Left) ? 0x80 : 0) |
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(IsPressed(SuborMouse::Buttons::Right) ? 0x40 : 0) |
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(leftFlag ? 0x20 : 0) |
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(mov.dx & 0x10) |
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(upFlag ? 0x08 : 0) |
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((mov.dy & 0x10) >> 2) |
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0x01;
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_packetBytes[1] = ((mov.dx & 0x0F) << 2) | 0x02;
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_packetBytes[2] = ((mov.dy & 0x0F) << 2) | 0x03;
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_packetSize = 3;
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}
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_packetPos = 0;
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_stateBuffer = _packetBytes[0];
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}
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}; |