Tested some desktop stuff and added projection matrix updates for window resizing.

examples/core/core_basic_window.cpp

@@ -28,6 +28,8 @@ int main(int argc, char* argv[])
 	int screenWidth = 800;
 	int screenHeight = 450;
 
+	SetConfigFlags(FLAG_WINDOW_RESIZABLE);
+
 	InitWindow(screenWidth, screenHeight, "raylib [core] example - basic window");
 
 	SetTargetFPS(60);

projects/VS2017.UWP/raylib.App.UWP/App.cpp

@@ -18,7 +18,7 @@ int main(Platform::Array<Platform::String^>^)
 App::App()
 {
 	//This does not work... need to fix this.
-	SetConfigFlags(FLAG_SHOW_LOGO);
+	SetConfigFlags(0);
 }
 
 static int posX = 100;

projects/VS2017.UWP/raylib.App.UWP/BaseApp.h

@@ -123,6 +123,16 @@ public:
 
 	virtual void Run()
 	{
+		//Get display dimensions
+		DisplayInformation^ dInfo = DisplayInformation::GetForCurrentView();
+		Vector2 screenSize = { dInfo->ScreenWidthInRawPixels, dInfo->ScreenHeightInRawPixels };
+
+		//Send display dimensions
+		UWPMessage* msg = CreateUWPMessage();
+		msg->Type = SetDisplayDims;
+		msg->Vector0 = screenSize;
+		UWPSendMessage(msg);
+
 		while (!mWindowClosed)
 		{
 			if (mWindowVisible)
@@ -285,7 +295,12 @@ protected:
 	void OnResuming(Platform::Object^ sender, Platform::Object^ args) {}
 
 	// Window event handlers.
-	void OnWindowSizeChanged(Windows::UI::Core::CoreWindow^ sender, Windows::UI::Core::WindowSizeChangedEventArgs^ args) {}
+	void OnWindowSizeChanged(Windows::UI::Core::CoreWindow^ sender, Windows::UI::Core::WindowSizeChangedEventArgs^ args)
+	{
+		UWPMessage* msg = CreateUWPMessage();
+		msg->Type = HandleResize;
+		UWPSendMessage(msg);
+	}
 
 	void OnVisibilityChanged(Windows::UI::Core::CoreWindow^ sender, Windows::UI::Core::VisibilityChangedEventArgs^ args)
 	{
@@ -416,8 +431,8 @@ private:
 	bool mWindowClosed = false;
 	bool mWindowVisible = true;
 
-	int width = 800;
+	int width = 640;
-	int height = 450;
+	int height = 480;
 };
 
 //Application source for creating the program

src/core.c

@@ -626,13 +626,11 @@ void InitWindow(int width, int height, const char *title)
     mousePosition.y = (float)screenHeight/2.0f;
 
     // raylib logo appearing animation (if enabled)
-#if !defined(PLATFORM_UWP)
     if (showLogo)
     {
         SetTargetFPS(60);
         LogoAnimation();
     }
-#endif //defined(PLATFORM_UWP)
 #endif        // defined(PLATFORM_ANDROID)
 }
 
@@ -887,7 +885,6 @@ int GetScreenHeight(void)
 // Get native window handle
 void *GetWindowHandle(void)
 {
-	//TODO: See if we can do UWP?
 #ifdef PLATFORM_DESKTOP
     // NOTE: Returned handle is: void *HWND (windows.h)
     return glfwGetWin32Window(window);
@@ -2764,6 +2761,8 @@ static bool InitGraphicsDevice(int width, int height)
     eglQuerySurface(display, surface, EGL_WIDTH, &screenWidth);
     eglQuerySurface(display, surface, EGL_HEIGHT, &screenHeight);
 
+	//SetupFramebuffer(displayWidth, displayHeight); //Borked
+
 #else   // PLATFORM_ANDROID, PLATFORM_RPI
     EGLint numConfigs;
 
@@ -2934,8 +2933,8 @@ static void SetupFramebuffer(int width, int height)
 		TraceLog(LOG_WARNING, "DOWNSCALING: Required screen size (%ix%i) is bigger than display size (%ix%i)", screenWidth, screenHeight, displayWidth, displayHeight);
 
 		// Downscaling to fit display with border-bars
-        float widthRatio = (float)displayWidth/(float)screenWidth;
+		float widthRatio = (float)displayWidth / (float)screenWidth;
-        float heightRatio = (float)displayHeight/(float)screenHeight;
+		float heightRatio = (float)displayHeight / (float)screenHeight;
 
 		if (widthRatio <= heightRatio)
 		{
@@ -2953,7 +2952,7 @@ static void SetupFramebuffer(int width, int height)
 		}
 
 		// Screen scaling required
-        float scaleRatio = (float)renderWidth/(float)screenWidth;
+		float scaleRatio = (float)renderWidth / (float)screenWidth;
 		screenScaling = MatrixScale(scaleRatio, scaleRatio, scaleRatio);
 
 		// NOTE: We render to full display resolution!
@@ -2969,13 +2968,13 @@ static void SetupFramebuffer(int width, int height)
 		TraceLog(LOG_INFO, "UPSCALING: Required screen size: %i x %i -> Display size: %i x %i", screenWidth, screenHeight, displayWidth, displayHeight);
 
 		// Upscaling to fit display with border-bars
-        float displayRatio = (float)displayWidth/(float)displayHeight;
+		float displayRatio = (float)displayWidth / (float)displayHeight;
-        float screenRatio = (float)screenWidth/(float)screenHeight;
+		float screenRatio = (float)screenWidth / (float)screenHeight;
 
 		if (displayRatio <= screenRatio)
 		{
 			renderWidth = screenWidth;
-            renderHeight = (int)round((float)screenWidth/displayRatio);
+			renderHeight = (int)round((float)screenWidth / displayRatio);
 			renderOffsetX = 0;
 			renderOffsetY = (renderHeight - screenHeight);
 		}
@@ -3263,6 +3262,39 @@ static void PollInputEvents(void)
 			break;
 		}
 
+		case SetDisplayDims:
+		{
+			displayWidth = msg->Vector0.x;
+			displayHeight = msg->Vector0.y;
+			break;
+		}
+
+		case HandleResize:
+		{
+			eglQuerySurface(display, surface, EGL_WIDTH, &screenWidth);
+			eglQuerySurface(display, surface, EGL_HEIGHT, &screenHeight);
+
+			// If window is resized, viewport and projection matrix needs to be re-calculated
+			rlViewport(0, 0, screenWidth, screenHeight);            // Set viewport width and height
+			rlMatrixMode(RL_PROJECTION);                // Switch to PROJECTION matrix
+			rlLoadIdentity();                           // Reset current matrix (PROJECTION)
+			rlOrtho(0, screenWidth, screenHeight, 0, 0.0f, 1.0f);   // Orthographic projection mode with top-left corner at (0,0)
+			rlMatrixMode(RL_MODELVIEW);                 // Switch back to MODELVIEW matrix
+			rlLoadIdentity();                           // Reset current matrix (MODELVIEW)
+			rlClearScreenBuffers();                     // Clear screen buffers (color and depth)
+
+			// Window size must be updated to be used on 3D mode to get new aspect ratio (BeginMode3D())
+			// NOTE: Be careful! GLFW3 will choose the closest fullscreen resolution supported by current monitor,
+			// for example, if reescaling back to 800x450 (desired), it could set 720x480 (closest fullscreen supported)
+			currentWidth = screenWidth;
+			currentHeight = screenHeight;
+
+			// NOTE: Postprocessing texture is not scaled to new size
+
+			windowResized = true;
+			break;
+		}
+
 		}
 
 		DeleteUWPMessage(msg); //Delete, we are done

src/utils.h

@@ -82,6 +82,8 @@ typedef enum
 	MarkGamepadActive, //Int0 (gamepad), Bool0 (active or not)
 	MarkGamepadButton, //Int0 (gamepad), Int1 (button), Char0 (status)
 	MarkGamepadAxis, //Int0 (gamepad), int1 (axis), Float0 (value)
+	SetDisplayDims, //Vector0 (display dimensions)
+	HandleResize, //Vector0 (new dimensions) - Onresized event
 } UWPMessageType;
 
 typedef struct UWPMessage {