mirror of
https://github.com/RetroDECK/Duckstation.git
synced 2024-10-23 23:55:42 +00:00
278 lines
7.8 KiB
C++
278 lines
7.8 KiB
C++
// SPDX-FileCopyrightText: 2019-2022 Connor McLaughlin <stenzek@gmail.com>
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// SPDX-License-Identifier: (GPL-3.0 OR CC-BY-NC-ND-4.0)
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#include "guncon.h"
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#include "common/assert.h"
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#include "common/log.h"
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#include "gpu.h"
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#include "host.h"
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#include "host_display.h"
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#include "resources.h"
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#include "system.h"
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#include "util/state_wrapper.h"
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#include <array>
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Log_SetChannel(GunCon);
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static constexpr std::array<u8, static_cast<size_t>(GunCon::Button::Count)> s_button_indices = {{13, 3, 14}};
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GunCon::GunCon(u32 index) : Controller(index) {}
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GunCon::~GunCon() = default;
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ControllerType GunCon::GetType() const
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{
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return ControllerType::GunCon;
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}
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void GunCon::Reset()
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{
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m_transfer_state = TransferState::Idle;
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}
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bool GunCon::DoState(StateWrapper& sw, bool apply_input_state)
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{
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if (!Controller::DoState(sw, apply_input_state))
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return false;
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u16 button_state = m_button_state;
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u16 position_x = m_position_x;
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u16 position_y = m_position_y;
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sw.Do(&button_state);
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sw.Do(&position_x);
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sw.Do(&position_y);
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if (apply_input_state)
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{
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m_button_state = button_state;
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m_position_x = position_x;
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m_position_y = position_y;
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}
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sw.Do(&m_transfer_state);
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return true;
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}
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float GunCon::GetBindState(u32 index) const
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{
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if (index >= s_button_indices.size())
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return 0.0f;
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const u32 bit = s_button_indices[index];
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return static_cast<float>(((m_button_state >> bit) & 1u) ^ 1u);
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}
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void GunCon::SetBindState(u32 index, float value)
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{
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const bool pressed = (value >= 0.5f);
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if (index == static_cast<u32>(Button::ShootOffscreen))
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{
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if (m_shoot_offscreen != pressed)
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{
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m_shoot_offscreen = pressed;
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SetBindState(static_cast<u32>(Button::Trigger), pressed);
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}
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return;
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}
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if (pressed)
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m_button_state &= ~(u16(1) << s_button_indices[static_cast<u8>(index)]);
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else
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m_button_state |= u16(1) << s_button_indices[static_cast<u8>(index)];
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}
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void GunCon::ResetTransferState()
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{
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m_transfer_state = TransferState::Idle;
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}
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bool GunCon::Transfer(const u8 data_in, u8* data_out)
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{
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static constexpr u16 ID = 0x5A63;
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switch (m_transfer_state)
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{
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case TransferState::Idle:
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{
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*data_out = 0xFF;
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if (data_in == 0x01)
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{
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m_transfer_state = TransferState::Ready;
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return true;
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}
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return false;
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}
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case TransferState::Ready:
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{
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if (data_in == 0x42)
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{
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*data_out = Truncate8(ID);
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m_transfer_state = TransferState::IDMSB;
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return true;
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}
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*data_out = 0xFF;
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return false;
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}
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case TransferState::IDMSB:
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{
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*data_out = Truncate8(ID >> 8);
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m_transfer_state = TransferState::ButtonsLSB;
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return true;
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}
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case TransferState::ButtonsLSB:
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{
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*data_out = Truncate8(m_button_state);
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m_transfer_state = TransferState::ButtonsMSB;
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return true;
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}
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case TransferState::ButtonsMSB:
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{
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*data_out = Truncate8(m_button_state >> 8);
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m_transfer_state = TransferState::XLSB;
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return true;
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}
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case TransferState::XLSB:
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{
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UpdatePosition();
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*data_out = Truncate8(m_position_x);
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m_transfer_state = TransferState::XMSB;
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return true;
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}
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case TransferState::XMSB:
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{
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*data_out = Truncate8(m_position_x >> 8);
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m_transfer_state = TransferState::YLSB;
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return true;
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}
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case TransferState::YLSB:
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{
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*data_out = Truncate8(m_position_y);
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m_transfer_state = TransferState::YMSB;
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return true;
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}
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case TransferState::YMSB:
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{
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*data_out = Truncate8(m_position_y >> 8);
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m_transfer_state = TransferState::Idle;
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return false;
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}
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default:
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{
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UnreachableCode();
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return false;
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}
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}
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}
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void GunCon::UpdatePosition()
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{
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// get screen coordinates
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const s32 mouse_x = g_host_display->GetMousePositionX();
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const s32 mouse_y = g_host_display->GetMousePositionY();
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// are we within the active display area?
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u32 tick, line;
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if (mouse_x < 0 || mouse_y < 0 ||
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!g_gpu->ConvertScreenCoordinatesToBeamTicksAndLines(mouse_x, mouse_y, m_x_scale, &tick, &line) ||
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m_shoot_offscreen)
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{
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Log_DebugPrintf("Lightgun out of range for window coordinates %d,%d", mouse_x, mouse_y);
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m_position_x = 0x01;
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m_position_y = 0x0A;
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return;
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}
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// 8MHz units for X = 44100*768*11/7 = 53222400 / 8000000 = 6.6528
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const double divider = static_cast<double>(g_gpu->GetCRTCFrequency()) / 8000000.0;
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m_position_x = static_cast<u16>(static_cast<float>(tick) / static_cast<float>(divider));
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m_position_y = static_cast<u16>(line);
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Log_DebugPrintf("Lightgun window coordinates %d,%d -> tick %u line %u 8mhz ticks %u", mouse_x, mouse_y, tick, line,
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m_position_x);
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}
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std::unique_ptr<GunCon> GunCon::Create(u32 index)
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{
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return std::make_unique<GunCon>(index);
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}
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static const Controller::ControllerBindingInfo s_binding_info[] = {
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#define BUTTON(name, display_name, button, genb) \
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{ \
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name, display_name, static_cast<u32>(button), InputBindingInfo::Type::Button, genb \
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}
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BUTTON("Trigger", "Trigger", GunCon::Button::Trigger, GenericInputBinding::R2),
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BUTTON("ShootOffscreen", "ShootOffscreen", GunCon::Button::ShootOffscreen, GenericInputBinding::L2),
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BUTTON("A", "A", GunCon::Button::A, GenericInputBinding::Cross),
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BUTTON("B", "B", GunCon::Button::B, GenericInputBinding::Circle),
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#undef BUTTON
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};
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static const SettingInfo s_settings[] = {
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{SettingInfo::Type::Path, "CrosshairImagePath", TRANSLATABLE("GunCon", "Crosshair Image Path"),
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TRANSLATABLE("GunCon", "Path to an image to use as a crosshair/cursor.")},
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{SettingInfo::Type::Float, "CrosshairScale", TRANSLATABLE("GunCon", "Crosshair Image Scale"),
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TRANSLATABLE("GunCon", "Scale of crosshair image on screen."), "1.0", "0.0001", "100.0", "0.10", "%.0f%%", nullptr,
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100.0f},
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{SettingInfo::Type::Float, "XScale", TRANSLATABLE("GunCon", "X Scale"),
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TRANSLATABLE("GunCon", "Scales X coordinates relative to the center of the screen."), "1.0", "0.01", "2.0", "0.01",
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"%.0f%%", nullptr, 100.0f}};
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const Controller::ControllerInfo GunCon::INFO = {ControllerType::GunCon,
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"GunCon",
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TRANSLATABLE("ControllerType", "GunCon"),
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s_binding_info,
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countof(s_binding_info),
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s_settings,
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countof(s_settings),
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Controller::VibrationCapabilities::NoVibration};
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void GunCon::LoadSettings(SettingsInterface& si, const char* section)
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{
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Controller::LoadSettings(si, section);
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std::string path = si.GetStringValue(section, "CrosshairImagePath");
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if (path != m_crosshair_image_path)
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{
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m_crosshair_image_path = std::move(path);
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if (m_crosshair_image_path.empty() || !m_crosshair_image.LoadFromFile(m_crosshair_image_path.c_str()))
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{
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m_crosshair_image.Invalidate();
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}
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}
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#ifndef __ANDROID__
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if (!m_crosshair_image.IsValid())
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{
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m_crosshair_image.SetPixels(Resources::CROSSHAIR_IMAGE_WIDTH, Resources::CROSSHAIR_IMAGE_HEIGHT,
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Resources::CROSSHAIR_IMAGE_DATA.data());
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}
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#endif
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m_crosshair_image_scale = si.GetFloatValue(section, "CrosshairScale", 1.0f);
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m_x_scale = si.GetFloatValue(section, "XScale", 1.0f);
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}
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bool GunCon::GetSoftwareCursor(const Common::RGBA8Image** image, float* image_scale, bool* relative_mode)
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{
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if (!m_crosshair_image.IsValid())
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return false;
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*image = &m_crosshair_image;
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*image_scale = m_crosshair_image_scale;
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*relative_mode = false;
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return true;
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}
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