1 files changed, 107 insertions, 0 deletions
diff --git a/src/core/frontend/emu_window.cpp b/src/core/frontend/emu_window.cpp
new file mode 100644
index 000000000..f6f90f9e1
--- /dev/null
+++ b/src/core/frontend/emu_window.cpp
@@ -0,0 +1,107 @@
+// 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/frontend/emu_window.h"
+#include "core/frontend/key_map.h"
+#include "video_core/video_core.h"
+
+void EmuWindow::ButtonPressed(Service::HID::PadState pad) {
+    pad_state.hex |= pad.hex;
+}
+
+void EmuWindow::ButtonReleased(Service::HID::PadState pad) {
+    pad_state.hex &= ~pad.hex;
+}
+
+void EmuWindow::CirclePadUpdated(float x, float y) {
+    constexpr int MAX_CIRCLEPAD_POS = 0x9C; // Max value for a circle pad position
+
+    // Make sure the coordinates are in the unit circle,
+    // otherwise normalize it.
+    float r = x * x + y * y;
+    if (r > 1) {
+        r = std::sqrt(r);
+        x /= r;
+        y /= r;
+    }
+
+    circle_pad_x = static_cast<s16>(x * MAX_CIRCLEPAD_POS);
+    circle_pad_y = static_cast<s16>(y * MAX_CIRCLEPAD_POS);
+}
+
+/**
+ * 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;
+    pad_state.touch.Assign(1);
+}
+
+void EmuWindow::TouchReleased() {
+    touch_pressed = false;
+    touch_x = 0;
+    touch_y = 0;
+    pad_state.touch.Assign(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::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);
+}