124 lines
4.3 KiB
C++
124 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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GraphicsContext::~GraphicsContext() = default;
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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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Input::TouchStatus status;
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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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Input::TouchStatus 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 state->status;
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}
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return {};
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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::MinimumSize::Width, Layout::MinimumSize::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, std::size_t id) {
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if (!IsWithinTouchscreen(framebuffer_layout, framebuffer_x, framebuffer_y)) {
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return;
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}
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if (id >= touch_state->status.size()) {
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return;
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}
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std::lock_guard guard{touch_state->mutex};
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const float x =
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static_cast<float>(framebuffer_x - framebuffer_layout.screen.left) /
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static_cast<float>(framebuffer_layout.screen.right - framebuffer_layout.screen.left);
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const float y =
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static_cast<float>(framebuffer_y - framebuffer_layout.screen.top) /
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static_cast<float>(framebuffer_layout.screen.bottom - framebuffer_layout.screen.top);
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touch_state->status[id] = std::make_tuple(x, y, true);
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}
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void EmuWindow::TouchReleased(std::size_t id) {
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if (id >= touch_state->status.size()) {
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return;
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}
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std::lock_guard guard{touch_state->mutex};
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touch_state->status[id] = std::make_tuple(0.0f, 0.0f, false);
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}
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void EmuWindow::TouchMoved(unsigned framebuffer_x, unsigned framebuffer_y, std::size_t id) {
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if (id >= touch_state->status.size()) {
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return;
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}
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if (!std::get<2>(touch_state->status[id]))
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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, id);
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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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