From 9dbd30c44bd64fbefc78dce32128e196cb7f0da5 Mon Sep 17 00:00:00 2001
From: Sam C <samnchiet@protonmail.com>
Date: Wed, 29 Nov 2017 20:43:41 -0800
Subject: [PATCH] Add UWP gamepad input polling

Add a basic UWP gampead poll function with zero changes to code outside of App.cpp
---
 project/vs2015.UWP/raylib.App.UWP/App.cpp | 65 +++++++++++++++++++++++
 1 file changed, 65 insertions(+)

diff --git a/project/vs2015.UWP/raylib.App.UWP/App.cpp b/project/vs2015.UWP/raylib.App.UWP/App.cpp
index 7d98d707..8fe9bc19 100644
--- a/project/vs2015.UWP/raylib.App.UWP/App.cpp
+++ b/project/vs2015.UWP/raylib.App.UWP/App.cpp
@@ -10,12 +10,77 @@ using namespace Windows::UI::Core;
 using namespace Windows::UI::Input;
 using namespace Windows::Foundation;
 using namespace Windows::Foundation::Collections;
+using namespace Windows::Gaming::Input;
 using namespace Windows::Graphics::Display;
 using namespace Microsoft::WRL;
 using namespace Platform;
 
 using namespace raylibUWP;
 
+/* GAMEPAD CODE */
+
+// Stand-ins for "core.c" variables
+#define MAX_GAMEPADS              4         // Max number of gamepads supported
+#define MAX_GAMEPAD_BUTTONS       32        // Max bumber of buttons supported (per gamepad)
+#define MAX_GAMEPAD_AXIS          8         // Max number of axis supported (per gamepad)
+
+static bool gamepadReady[MAX_GAMEPADS] = { false };             // Flag to know if gamepad is ready
+static float gamepadAxisState[MAX_GAMEPADS][MAX_GAMEPAD_AXIS];  // Gamepad axis state
+static char previousGamepadState[MAX_GAMEPADS][MAX_GAMEPAD_BUTTONS];    // Previous gamepad buttons state
+static char currentGamepadState[MAX_GAMEPADS][MAX_GAMEPAD_BUTTONS];     // Current gamepad buttons state
+
+void UWP_PollInput()
+{
+	// Check if gamepads are ready
+	for (int i = 0; i < MAX_GAMEPADS; i++)
+	{
+		// HACK: UWP keeps a contiguous list of gamepads. For the interest of time I'm just doing a 1:1 mapping of
+		// connected gamepads with their spot in the list, but this has serious robustness problems
+		// e.g. player 1, 2, and 3 are playing a game - if player2 disconnects, p3's controller would now be mapped to p2's character since p3 is now second in the list.
+
+		gamepadReady[i] = (i < Gamepad::Gamepads->Size);
+	}
+
+	// Get current gamepad state
+	for (int i = 0; i < MAX_GAMEPADS; i++)
+	{
+		if (gamepadReady[i])
+		{
+			// Register previous gamepad states
+			for (int k = 0; k < MAX_GAMEPAD_BUTTONS; k++) previousGamepadState[i][k] = currentGamepadState[i][k];
+
+			// Get current gamepad state
+			auto gamepad = Gamepad::Gamepads->GetAt(i);
+			GamepadReading reading = gamepad->GetCurrentReading();
+
+			// NOTE: Maybe it would be wiser to redefine the gamepad button mappings in "raylib.h" for the UWP platform instead of doing this
+			currentGamepadState[i][GAMEPAD_XBOX_BUTTON_A] = ((reading.Buttons & GamepadButtons::A) == GamepadButtons::A);
+			currentGamepadState[i][GAMEPAD_XBOX_BUTTON_B] = ((reading.Buttons & GamepadButtons::B) == GamepadButtons::B);
+			currentGamepadState[i][GAMEPAD_XBOX_BUTTON_X] = ((reading.Buttons & GamepadButtons::X) == GamepadButtons::X);
+			currentGamepadState[i][GAMEPAD_XBOX_BUTTON_Y] = ((reading.Buttons & GamepadButtons::Y) == GamepadButtons::Y);
+			currentGamepadState[i][GAMEPAD_XBOX_BUTTON_LB] = ((reading.Buttons & GamepadButtons::LeftShoulder) == GamepadButtons::LeftShoulder);
+			currentGamepadState[i][GAMEPAD_XBOX_BUTTON_RB] = ((reading.Buttons & GamepadButtons::RightShoulder) == GamepadButtons::RightShoulder);
+			currentGamepadState[i][GAMEPAD_XBOX_BUTTON_SELECT] = ((reading.Buttons & GamepadButtons::View) == GamepadButtons::View); // Changed for XB1 Controller
+			currentGamepadState[i][GAMEPAD_XBOX_BUTTON_START] = ((reading.Buttons & GamepadButtons::Menu) == GamepadButtons::Menu); // Changed for XB1 Controller
+			currentGamepadState[i][GAMEPAD_XBOX_BUTTON_UP] = ((reading.Buttons & GamepadButtons::DPadUp) == GamepadButtons::DPadUp);
+			currentGamepadState[i][GAMEPAD_XBOX_BUTTON_RIGHT] = ((reading.Buttons & GamepadButtons::DPadRight) == GamepadButtons::DPadRight);
+			currentGamepadState[i][GAMEPAD_XBOX_BUTTON_DOWN] = ((reading.Buttons & GamepadButtons::DPadLeft) == GamepadButtons::DPadDown);
+			currentGamepadState[i][GAMEPAD_XBOX_BUTTON_LEFT] = ((reading.Buttons & GamepadButtons::DPadDown) == GamepadButtons::DPadLeft);
+			currentGamepadState[i][GAMEPAD_XBOX_BUTTON_HOME] = false; // Home button not supported by UWP
+
+																	  // Get current axis state
+			gamepadAxisState[i][GAMEPAD_XBOX_AXIS_LEFT_X] = reading.LeftThumbstickX;
+			gamepadAxisState[i][GAMEPAD_XBOX_AXIS_LEFT_Y] = reading.LeftThumbstickY;
+			gamepadAxisState[i][GAMEPAD_XBOX_AXIS_RIGHT_X] = reading.RightThumbstickX;
+			gamepadAxisState[i][GAMEPAD_XBOX_AXIS_RIGHT_Y] = reading.RightThumbstickY;
+			gamepadAxisState[i][GAMEPAD_XBOX_AXIS_LT] = reading.LeftTrigger;
+			gamepadAxisState[i][GAMEPAD_XBOX_AXIS_RT] = reading.RightTrigger;
+		}
+	}
+}
+
+/* OTHER CODE*/
+
 // Helper to convert a length in device-independent pixels (DIPs) to a length in physical pixels.
 inline float ConvertDipsToPixels(float dips, float dpi)
 {