Merge pull request #642 from bunnei/touchpad

Touchpad support

2 files changed, 101 insertions, 19 deletions

diff --git a/src/common/emu_window.cpp b/src/common/emu_window.cpp
index 6459d2f3..6516fc63 100644
--- a/src/common/emu_window.cpp
+++ b/src/common/emu_window.cpp
@@ -6,18 +6,61 @@
 #include "video_core/video_core.h"
 
 void EmuWindow::KeyPressed(KeyMap::HostDeviceKey key) {
-    Service::HID::PadState mapped_key = KeyMap::GetPadKey(key);
-
-    Service::HID::PadButtonPress(mapped_key);
+    pad_state.hex |= KeyMap::GetPadKey(key).hex;
 }
 
 void EmuWindow::KeyReleased(KeyMap::HostDeviceKey key) {
-    Service::HID::PadState mapped_key = KeyMap::GetPadKey(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);
+}
+
+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);
 
-    Service::HID::PadButtonRelease(mapped_key);
+    touch_pressed = true;
+    pad_state.touch = 1;
 }
 
-EmuWindow::FramebufferLayout EmuWindow::FramebufferLayout::DefaultScreenLayout(unsigned width, unsigned height) {
+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))
+        TouchPressed(framebuffer_x, framebuffer_y);
+    else
+        TouchReleased();
+}
+
+EmuWindow::FramebufferLayout EmuWindow::FramebufferLayout::DefaultScreenLayout(unsigned width,
+    unsigned height) {
+
     ASSERT(width > 0);
     ASSERT(height > 0);
 
diff --git a/src/common/emu_window.h b/src/common/emu_window.h
index f6099fdb..2be7517b 100644
--- a/src/common/emu_window.h
+++ b/src/common/emu_window.h
@@ -71,10 +71,48 @@ public:
     virtual void ReloadSetKeymaps() = 0;
 
     /// Signals a key press action to the HID module
-    static void KeyPressed(KeyMap::HostDeviceKey key);
+    void KeyPressed(KeyMap::HostDeviceKey key);
 
     /// Signals a key release action to the HID module
-    static void KeyReleased(KeyMap::HostDeviceKey key);
+    void KeyReleased(KeyMap::HostDeviceKey key);
+
+    /**
+     * Signal that a touch pressed event has occurred (e.g. mouse click pressed)
+     * @param framebuffer_x Framebuffer x-coordinate that was pressed
+     * @param framebuffer_y Framebuffer y-coordinate that was pressed
+     */
+    void TouchPressed(unsigned framebuffer_x, unsigned framebuffer_y);
+
+    /// Signal that a touch released event has occurred (e.g. mouse click released)
+    void TouchReleased();
+
+    /**
+     * Signal that a touch movement event has occurred (e.g. mouse was moved over the emu window)
+     * @param framebuffer_x Framebuffer x-coordinate
+     * @param framebuffer_y Framebuffer y-coordinate
+     */
+    void TouchMoved(unsigned framebuffer_x, unsigned framebuffer_y);
+
+    /**
+     * Gets the current pad state (which buttons are pressed and the circle pad direction).
+     * @note This should be called by the core emu thread to get a state set by the window thread.
+     * @todo Fix this function to be thread-safe.
+     * @return PadState object indicating the current pad state
+     */
+    const Service::HID::PadState GetPadState() const {
+        return pad_state;
+    }
+
+    /**
+     * Gets the current touch screen state (touch X/Y coordinates and whether or not it is pressed).
+     * @note This should be called by the core emu thread to get a state set by the window thread.
+     * @todo Fix this function to be thread-safe.
+     * @return std::tuple of (x, y, pressed) where `x` and `y` are the touch coordinates and
+     *         `pressed` is true if the touch screen is currently being pressed
+     */
+    const std::tuple<u16, u16, bool>& GetTouchState() const {
+        return std::make_tuple(touch_x, touch_y, touch_pressed);
+    }
 
     /**
      * Returns currently active configuration.
@@ -100,21 +138,15 @@ public:
         return framebuffer_layout;
     }
 
-    /**
-     * Gets window client area width in logical coordinates.
-     * @note For high-DPI systems, this is smaller than the framebuffer size.
-     * @note This method is thread-safe
-     */
-    std::pair<unsigned,unsigned> GetClientAreaSize() const {
-        return std::make_pair(client_area_width, client_area_height);
-    }
-
 protected:
-    EmuWindow()
-    {
+    EmuWindow() {
         // TODO: Find a better place to set this.
         config.min_client_area_size = std::make_pair(400u, 480u);
         active_config = config;
+        pad_state.hex = 0;
+        touch_x = 0;
+        touch_y = 0;
+        touch_pressed = false;
     }
     virtual ~EmuWindow() {}
 
@@ -168,4 +200,11 @@ private:
 
     WindowConfig config;         ///< Internal configuration (changes pending for being applied in ProcessConfigurationChanges)
     WindowConfig active_config;  ///< Internal active configuration
+
+    bool touch_pressed;          ///< True if touchpad area is currently pressed, otherwise false
+
+    u16 touch_x;    ///< Touchpad X-position in native 3DS pixel coordinates (0-320)
+    u16 touch_y;    ///< Touchpad Y-position in native 3DS pixel coordinates (0-240)
+
+    Service::HID::PadState pad_state;
 };