781ab8407b
Since C++17, the introduction of deduction guides for locking facilities means that we no longer need to hardcode the mutex type into the locks themselves, making it easier to switch mutex types, should it ever be necessary in the future.
115 lines
4.3 KiB
C++
115 lines
4.3 KiB
C++
// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <cmath>
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#include <mutex>
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#include "core/frontend/emu_window.h"
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#include "core/frontend/input.h"
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#include "core/settings.h"
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namespace Core::Frontend {
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class EmuWindow::TouchState : public Input::Factory<Input::TouchDevice>,
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public std::enable_shared_from_this<TouchState> {
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public:
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std::unique_ptr<Input::TouchDevice> Create(const Common::ParamPackage&) override {
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return std::make_unique<Device>(shared_from_this());
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}
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std::mutex mutex;
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bool touch_pressed = false; ///< True if touchpad area is currently pressed, otherwise false
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float touch_x = 0.0f; ///< Touchpad X-position
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float touch_y = 0.0f; ///< Touchpad Y-position
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private:
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class Device : public Input::TouchDevice {
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public:
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explicit Device(std::weak_ptr<TouchState>&& touch_state) : touch_state(touch_state) {}
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std::tuple<float, float, bool> GetStatus() const override {
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if (auto state = touch_state.lock()) {
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std::lock_guard guard{state->mutex};
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return std::make_tuple(state->touch_x, state->touch_y, state->touch_pressed);
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}
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return std::make_tuple(0.0f, 0.0f, false);
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}
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private:
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std::weak_ptr<TouchState> touch_state;
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};
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};
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EmuWindow::EmuWindow() {
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// TODO: Find a better place to set this.
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config.min_client_area_size =
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std::make_pair(Layout::ScreenUndocked::Width, Layout::ScreenUndocked::Height);
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active_config = config;
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touch_state = std::make_shared<TouchState>();
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Input::RegisterFactory<Input::TouchDevice>("emu_window", touch_state);
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}
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EmuWindow::~EmuWindow() {
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Input::UnregisterFactory<Input::TouchDevice>("emu_window");
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}
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/**
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* Check if the given x/y coordinates are within the touchpad specified by the framebuffer layout
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* @param layout FramebufferLayout object describing the framebuffer size and screen positions
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* @param framebuffer_x Framebuffer x-coordinate to check
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* @param framebuffer_y Framebuffer y-coordinate to check
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* @return True if the coordinates are within the touchpad, otherwise false
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*/
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static bool IsWithinTouchscreen(const Layout::FramebufferLayout& layout, unsigned framebuffer_x,
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unsigned framebuffer_y) {
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return (framebuffer_y >= layout.screen.top && framebuffer_y < layout.screen.bottom &&
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framebuffer_x >= layout.screen.left && framebuffer_x < layout.screen.right);
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}
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std::tuple<unsigned, unsigned> EmuWindow::ClipToTouchScreen(unsigned new_x, unsigned new_y) const {
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new_x = std::max(new_x, framebuffer_layout.screen.left);
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new_x = std::min(new_x, framebuffer_layout.screen.right - 1);
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new_y = std::max(new_y, framebuffer_layout.screen.top);
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new_y = std::min(new_y, framebuffer_layout.screen.bottom - 1);
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return std::make_tuple(new_x, new_y);
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}
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void EmuWindow::TouchPressed(unsigned framebuffer_x, unsigned framebuffer_y) {
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if (!IsWithinTouchscreen(framebuffer_layout, framebuffer_x, framebuffer_y))
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return;
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std::lock_guard guard{touch_state->mutex};
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touch_state->touch_x = static_cast<float>(framebuffer_x - framebuffer_layout.screen.left) /
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(framebuffer_layout.screen.right - framebuffer_layout.screen.left);
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touch_state->touch_y = static_cast<float>(framebuffer_y - framebuffer_layout.screen.top) /
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(framebuffer_layout.screen.bottom - framebuffer_layout.screen.top);
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touch_state->touch_pressed = true;
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}
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void EmuWindow::TouchReleased() {
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std::lock_guard guard{touch_state->mutex};
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touch_state->touch_pressed = false;
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touch_state->touch_x = 0;
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touch_state->touch_y = 0;
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}
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void EmuWindow::TouchMoved(unsigned framebuffer_x, unsigned framebuffer_y) {
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if (!touch_state->touch_pressed)
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return;
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if (!IsWithinTouchscreen(framebuffer_layout, framebuffer_x, framebuffer_y))
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std::tie(framebuffer_x, framebuffer_y) = ClipToTouchScreen(framebuffer_x, framebuffer_y);
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TouchPressed(framebuffer_x, framebuffer_y);
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}
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void EmuWindow::UpdateCurrentFramebufferLayout(unsigned width, unsigned height) {
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NotifyFramebufferLayoutChanged(Layout::DefaultFrameLayout(width, height));
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}
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} // namespace Core::Frontend
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