From 543232436fae8d1d0f9fdd94baf0ca88d4eea067 Mon Sep 17 00:00:00 2001
From: bunnei <bunneidev@gmail.com>
Date: Sun, 8 Mar 2015 03:13:26 -0400
Subject: EmuWindow: Added infrastructure code to enable touchpad support.

---
 src/common/emu_window.cpp | 65 ++++++++++++++++++++++++++++++++++++++++++++++-
 src/common/emu_window.h   | 29 +++++++++++++++++++++
 2 files changed, 93 insertions(+), 1 deletion(-)

(limited to 'src/common')

diff --git a/src/common/emu_window.cpp b/src/common/emu_window.cpp
index 6459d2f32..11e6ad76b 100644
--- a/src/common/emu_window.cpp
+++ b/src/common/emu_window.cpp
@@ -5,6 +5,8 @@
 #include "emu_window.h"
 #include "video_core/video_core.h"
 
+bool EmuWindow::touch_pressed = false;
+
 void EmuWindow::KeyPressed(KeyMap::HostDeviceKey key) {
     Service::HID::PadState mapped_key = KeyMap::GetPadKey(key);
 
@@ -17,7 +19,68 @@ void EmuWindow::KeyReleased(KeyMap::HostDeviceKey key) {
     Service::HID::PadButtonRelease(mapped_key);
 }
 
-EmuWindow::FramebufferLayout EmuWindow::FramebufferLayout::DefaultScreenLayout(unsigned width, unsigned height) {
+/**
+ * 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(const FramebufferLayout& layout, unsigned framebuffer_x,
+    unsigned framebuffer_y) {
+
+    if (IsWithinTouchscreen(layout, framebuffer_x, framebuffer_y)) {
+        u16 touch_x = VideoCore::kScreenBottomWidth * (framebuffer_x - layout.bottom_screen.left) /
+            (layout.bottom_screen.right - layout.bottom_screen.left);
+        u16 touch_y = VideoCore::kScreenBottomHeight * (framebuffer_y - layout.bottom_screen.top) /
+            (layout.bottom_screen.bottom - layout.bottom_screen.top);
+
+        Service::HID::TouchPress(touch_x, touch_y);
+        Service::HID::TouchUpdateComplete();
+
+        touch_pressed = true;
+    }
+}
+
+void EmuWindow::TouchReleased(const FramebufferLayout& layout, unsigned framebuffer_x,
+    unsigned framebuffer_y) {
+
+    if (IsWithinTouchscreen(layout, framebuffer_x, framebuffer_y)) {
+
+        Service::HID::TouchRelease();
+        Service::HID::TouchUpdateComplete();
+
+        touch_pressed = false;
+    }
+}
+
+void EmuWindow::TouchMoved(const FramebufferLayout& layout, unsigned framebuffer_x,
+    unsigned framebuffer_y) {
+
+    if (touch_pressed) {
+        if (IsWithinTouchscreen(layout, framebuffer_x, framebuffer_y)) {
+            EmuWindow::TouchPressed(layout, framebuffer_x, framebuffer_y);
+        } else {
+            Service::HID::TouchRelease();
+            Service::HID::TouchUpdateComplete();
+
+            touch_pressed = false;
+        }
+    }
+}
+
+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 f6099fdb6..df81e9e0f 100644
--- a/src/common/emu_window.h
+++ b/src/common/emu_window.h
@@ -76,6 +76,33 @@ public:
     /// Signals a key release action to the HID module
     static void KeyReleased(KeyMap::HostDeviceKey key);
 
+    /**
+     * Signal that a touch pressed event has occurred (e.g. mouse click pressed)
+     * @param layout FramebufferLayout object describing the framebuffer size and screen positions
+     * @param framebuffer_x Framebuffer x-coordinate that was pressed
+     * @param framebuffer_y Framebuffer y-coordinate that was pressed
+     */
+    static void TouchPressed(const FramebufferLayout& layout, unsigned framebuffer_x,
+        unsigned framebuffer_y);
+
+    /**
+     * Signal that a touch released event has occurred (e.g. mouse click released)
+     * @param layout FramebufferLayout object describing the framebuffer size and screen positions
+     * @param framebuffer_x Framebuffer x-coordinate that was released
+     * @param framebuffer_y Framebuffer y-coordinate that was released
+     */
+    static void TouchReleased(const FramebufferLayout& layout, unsigned framebuffer_x,
+        unsigned framebuffer_y);
+
+    /**
+     * Signal that a touch movement event has occurred (e.g. mouse was moved over the emu window)
+     * @param layout FramebufferLayout object describing the framebuffer size and screen positions
+     * @param framebuffer_x Framebuffer x-coordinate
+     * @param framebuffer_y Framebuffer y-coordinate
+     */
+    static void TouchMoved(const FramebufferLayout& layout, unsigned framebuffer_x,
+        unsigned framebuffer_y);
+
     /**
      * Returns currently active configuration.
      * @note Accesses to the returned object need not be consistent because it may be modified in another thread
@@ -168,4 +195,6 @@ private:
 
     WindowConfig config;         ///< Internal configuration (changes pending for being applied in ProcessConfigurationChanges)
     WindowConfig active_config;  ///< Internal active configuration
+
+    static bool touch_pressed;   ///< True if touchpad area is currently pressed, otherwise false
 };
-- 
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