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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 "common/key_map.h"
#include "emu_window.h"
#include "video_core/video_core.h"
void EmuWindow::KeyPressed(KeyMap::HostDeviceKey key) {
pad_state.hex |= KeyMap::GetPadKey(key).hex;
}
void EmuWindow::KeyReleased(KeyMap::HostDeviceKey key) {
pad_state.hex &= ~KeyMap::GetPadKey(key).hex;
}
/**
* 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 EmuWindow::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;
pad_state.touch = 1;
}
void EmuWindow::TouchReleased() {
touch_pressed = false;
touch_x = 0;
touch_y = 0;
pad_state.touch = 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);
}
EmuWindow::FramebufferLayout EmuWindow::FramebufferLayout::DefaultScreenLayout(unsigned width, unsigned height) {
ASSERT(width > 0);
ASSERT(height > 0);
EmuWindow::FramebufferLayout res = { width, height, {}, {} };
float window_aspect_ratio = static_cast<float>(height) / width;
float emulation_aspect_ratio = static_cast<float>(VideoCore::kScreenTopHeight * 2) /
VideoCore::kScreenTopWidth;
if (window_aspect_ratio > emulation_aspect_ratio) {
// Window is narrower than the emulation content => apply borders to the top and bottom
int viewport_height = static_cast<int>(std::round(emulation_aspect_ratio * width));
res.top_screen.left = 0;
res.top_screen.right = res.top_screen.left + width;
res.top_screen.top = (height - viewport_height) / 2;
res.top_screen.bottom = res.top_screen.top + viewport_height / 2;
int bottom_width = static_cast<int>((static_cast<float>(VideoCore::kScreenBottomWidth) /
VideoCore::kScreenTopWidth) * (res.top_screen.right - res.top_screen.left));
int bottom_border = ((res.top_screen.right - res.top_screen.left) - bottom_width) / 2;
res.bottom_screen.left = bottom_border;
res.bottom_screen.right = res.bottom_screen.left + bottom_width;
res.bottom_screen.top = res.top_screen.bottom;
res.bottom_screen.bottom = res.bottom_screen.top + viewport_height / 2;
} else {
// Otherwise, apply borders to the left and right sides of the window.
int viewport_width = static_cast<int>(std::round(height / emulation_aspect_ratio));
res.top_screen.left = (width - viewport_width) / 2;
res.top_screen.right = res.top_screen.left + viewport_width;
res.top_screen.top = 0;
res.top_screen.bottom = res.top_screen.top + height / 2;
int bottom_width = static_cast<int>((static_cast<float>(VideoCore::kScreenBottomWidth) /
VideoCore::kScreenTopWidth) * (res.top_screen.right - res.top_screen.left));
int bottom_border = ((res.top_screen.right - res.top_screen.left) - bottom_width) / 2;
res.bottom_screen.left = res.top_screen.left + bottom_border;
res.bottom_screen.right = res.bottom_screen.left + bottom_width;
res.bottom_screen.top = res.top_screen.bottom;
res.bottom_screen.bottom = res.bottom_screen.top + height / 2;
}
return res;
}
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