mirror of
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
86 lines
2.1 KiB
C++
86 lines
2.1 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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#include "Console.h"
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#include "EmulationSettings.h"
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class SnesMouse : 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 _sensitivity = 0;
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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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Stream(_stateBuffer, _sensitivity);
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}
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string GetKeyNames() override
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{
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return "LR";
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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::SnesMouse)));
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}
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public:
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SnesMouse(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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if(_strobe) {
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_sensitivity = (_sensitivity + 1) % 3;
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}
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output = (_stateBuffer & 0x80000000) >> 31;
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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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MouseMovement mov = GetMovement();
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int32_t dx = mov.dx * (1 + _sensitivity);
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int32_t dy = mov.dy * (1 + _sensitivity);
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uint32_t upFlag = dy < 0 ? 0x80 : 0;
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uint32_t leftFlag = dx < 0 ? 0x80 : 0;
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dx = std::min(std::abs(dx), 127);
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dy = std::min(std::abs(dy), 127);
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uint8_t byte1 = 0;
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uint8_t byte2 = 0x01 | ((_sensitivity & 0x03) << 4) | (IsPressed(SnesMouse::Buttons::Left) ? 0x40 : 0) | (IsPressed(SnesMouse::Buttons::Right) ? 0x80 : 0);
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uint8_t byte3 = dy | upFlag;
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uint8_t byte4 = dx | leftFlag;
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_stateBuffer = (byte1 << 24) | (byte2 << 16) | (byte3 << 8) | byte4;
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}
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}; |