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// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <cmath>
#include "common/assert.h"
#include "core/core.h"
#include "core/frontend/emu_window.h"
#include "core/settings.h"
#include "video_core/video_core.h"
/**
* Check if the given x/y coordinates are within the touchpad specified by the framebuffer layout
* @param layout FramebufferLayout object describing the framebuffer size and screen positions
* @param framebuffer_x Framebuffer x-coordinate to check
* @param framebuffer_y Framebuffer y-coordinate to check
* @return True if the coordinates are within the touchpad, otherwise false
*/
static bool IsWithinTouchscreen(const Layout::FramebufferLayout& layout, unsigned framebuffer_x,
unsigned framebuffer_y) {
return (
framebuffer_y >= layout.bottom_screen.top && framebuffer_y < layout.bottom_screen.bottom &&
framebuffer_x >= layout.bottom_screen.left && framebuffer_x < layout.bottom_screen.right);
}
std::tuple<unsigned, unsigned> EmuWindow::ClipToTouchScreen(unsigned new_x, unsigned new_y) {
new_x = std::max(new_x, framebuffer_layout.bottom_screen.left);
new_x = std::min(new_x, framebuffer_layout.bottom_screen.right - 1);
new_y = std::max(new_y, framebuffer_layout.bottom_screen.top);
new_y = std::min(new_y, framebuffer_layout.bottom_screen.bottom - 1);
return std::make_tuple(new_x, new_y);
}
void EmuWindow::TouchPressed(unsigned framebuffer_x, unsigned framebuffer_y) {
if (!IsWithinTouchscreen(framebuffer_layout, framebuffer_x, framebuffer_y))
return;
touch_x = VideoCore::kScreenBottomWidth *
(framebuffer_x - framebuffer_layout.bottom_screen.left) /
(framebuffer_layout.bottom_screen.right - framebuffer_layout.bottom_screen.left);
touch_y = VideoCore::kScreenBottomHeight *
(framebuffer_y - framebuffer_layout.bottom_screen.top) /
(framebuffer_layout.bottom_screen.bottom - framebuffer_layout.bottom_screen.top);
touch_pressed = true;
}
void EmuWindow::TouchReleased() {
touch_pressed = false;
touch_x = 0;
touch_y = 0;
}
void EmuWindow::TouchMoved(unsigned framebuffer_x, unsigned framebuffer_y) {
if (!touch_pressed)
return;
if (!IsWithinTouchscreen(framebuffer_layout, framebuffer_x, framebuffer_y))
std::tie(framebuffer_x, framebuffer_y) = ClipToTouchScreen(framebuffer_x, framebuffer_y);
TouchPressed(framebuffer_x, framebuffer_y);
}
void EmuWindow::AccelerometerChanged(float x, float y, float z) {
constexpr float coef = 512;
std::lock_guard<std::mutex> lock(accel_mutex);
// TODO(wwylele): do a time stretch as it in GyroscopeChanged
// The time stretch formula should be like
// stretched_vector = (raw_vector - gravity) * stretch_ratio + gravity
accel_x = static_cast<s16>(x * coef);
accel_y = static_cast<s16>(y * coef);
accel_z = static_cast<s16>(z * coef);
}
void EmuWindow::GyroscopeChanged(float x, float y, float z) {
constexpr float FULL_FPS = 60;
float coef = GetGyroscopeRawToDpsCoefficient();
float stretch = Core::System::GetInstance().perf_stats.GetLastFrameTimeScale();
std::lock_guard<std::mutex> lock(gyro_mutex);
gyro_x = static_cast<s16>(x * coef * stretch);
gyro_y = static_cast<s16>(y * coef * stretch);
gyro_z = static_cast<s16>(z * coef * stretch);
}
void EmuWindow::UpdateCurrentFramebufferLayout(unsigned width, unsigned height) {
Layout::FramebufferLayout layout;
switch (Settings::values.layout_option) {
case Settings::LayoutOption::SingleScreen:
layout = Layout::SingleFrameLayout(width, height, Settings::values.swap_screen);
break;
case Settings::LayoutOption::LargeScreen:
layout = Layout::LargeFrameLayout(width, height, Settings::values.swap_screen);
break;
case Settings::LayoutOption::Default:
default:
layout = Layout::DefaultFrameLayout(width, height, Settings::values.swap_screen);
break;
}
NotifyFramebufferLayoutChanged(layout);
}
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