Drawing to screen using multimedia

examples/using_multimedia.core

@@ -5,3 +5,7 @@ WinMain :: (hInstance: HINSTANCE, hPrevInstance: HINSTANCE, lpCmdLine: LPSTR, nS
   for UpdateMultimedia()
     if Mu.key[Key.Escape].is_down
       Mu.quit = true
+
+    for y := 0, y < Mu.y, y+=1
+      for x := 0, x < Mu.x, x+=1
+        Mu.scrn[x + y*Mu.x] = 0xFFFFFF00

modules/win32_multimedia.core

@@ -133,15 +133,25 @@ StartMultimedia :: (x: S64 = 1280, y: S64 = 720, title: String = "Hello people!"
   Mu.os.bitmap    = W32.CreateBitmap(Mu.os.window_dc, size)
 
   Mu.scrn = Mu.os.bitmap.data
-  Mu.x    = Mu.os.bitmap.size.x
-  Mu.y    = Mu.os.bitmap.size.y
+  Mu.x    = size.x
+  Mu.y    = size.y
 
 UpdateMultimedia :: (): Bool
+  DrawBitmapInCompatibleDC(&Mu.os.bitmap)
+
   msg: MSG
   for PeekMessageW(&msg, Mu.os.window, 0, 0, PM_REMOVE) == 1
     TranslateMessage(&msg)
     DispatchMessageW(&msg)
 
+  size := GetWindowSize(Mu.os.window)
+  if size.x != Mu.x || size.y != Mu.y
+    DestroyBitmap(&Mu.os.bitmap)
+    CreateBitmap(Mu.os.window_dc, size)
+
+  Mu.x = size.x
+  Mu.y = size.y
+
   Mu.frame_count += 1
   frame_time := Time() - Mu.time.frame_start
   Mu.time.total += frame_time