1 files changed, 99 insertions, 0 deletions
diff --git a/make/wgl-CustomCCode.c b/make/wgl-CustomCCode.c
new file mode 100755
index 000000000..be233fd9a
--- /dev/null
+++ b/make/wgl-CustomCCode.c
@@ -0,0 +1,99 @@
+#include <stdio.h>
+
+LRESULT	CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
+ATOM oglClass = 0;
+
+HWND CreateDummyWindow( int x, int y, int width, int height ) {
+  RECT rect;
+  HINSTANCE hInstance;
+  DWORD     dwExStyle;
+  DWORD     dwStyle;
+  HWND      hWnd;
+  ZeroMemory( &rect, sizeof( rect ) );
+  // I don't know if we need this but it can't hurt
+  if( width < 0 ) {
+    rect.left = x + width;
+    rect.right = x;
+  } else {
+    rect.left = x;
+    rect.right = x + width;
+  }
+  if( height < 0 ) {
+    rect.top = y + height;
+    rect.bottom = y;
+  } else {
+    rect.top = y;
+    rect.bottom = y + height;
+  }
+  hInstance = GetModuleHandle(NULL);
+  
+  if( !oglClass ) {
+    WNDCLASS  wc;
+    ZeroMemory( &wc, sizeof( wc ) );
+    wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
+    wc.lpfnWndProc = (WNDPROC) WndProc;
+    wc.cbClsExtra = 0;
+    wc.cbWndExtra = 0;
+    wc.hInstance = hInstance;
+    wc.hIcon = NULL;
+    wc.hCursor = NULL;
+    wc.hbrBackground = NULL;
+    wc.lpszMenuName = NULL;
+    wc.lpszClassName	= "OpenGL";
+    if( !(oglClass = RegisterClass( &wc )) ) {
+      printf( "RegisterClass Failed: %d\n", GetLastError() );
+      return( 0 );
+    }
+  }
+  
+  dwExStyle = WS_EX_APPWINDOW | WS_EX_WINDOWEDGE;
+  dwStyle = WS_OVERLAPPEDWINDOW;
+  if( !(hWnd=CreateWindowEx( dwExStyle, "OpenGL", "OpenGL",
+                             dwStyle | WS_CLIPSIBLINGS | WS_CLIPCHILDREN,
+                             rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top,
+                             NULL, NULL, hInstance, NULL ) ) ) {
+    return( 0 );
+  }
+  return( hWnd );
+}
+
+void NativeEventLoop() {
+  MSG msg;
+  BOOL ret;
+  // Grab windows system messages from queue
+  while( ( ret = GetMessage( &msg, NULL, 0, 0 ) ) != 0 ) {
+    if( ret == -1 ) {
+      printf( "Error GetMessage: %d", GetLastError() );
+    } else {
+      DispatchMessage( &msg ); 
+    }
+  }
+}
+
+void DestroyDummyWindow(HWND handle, HDC hdc) {
+  // Post a close window message from shutdown hook thread to
+  // window message pump thread
+  if( !PostMessage( handle, WM_CLOSE, 0, (LPARAM) hdc ) ) {
+    printf( "PostMessage Failed: %d\n", GetLastError() );
+  }
+}
+
+LRESULT CALLBACK WndProc( HWND   hWnd, UINT   uMsg, WPARAM wParam, LPARAM lParam) {
+  switch( uMsg ) {
+    case WM_CLOSE:
+      // Destroy HDC
+      if( ReleaseDC( hWnd, (HDC) lParam ) != 1 ) {
+        printf( "Error Releasing DC: %d\n", GetLastError() );
+      }
+      // Destroy HWND
+      if( DestroyWindow( hWnd ) == 0 ) {
+        printf( "Error Destroying Window: %d\n", GetLastError() );
+      }
+      break;
+    case WM_DESTROY:
+      // Terminate Dummy Window
+      PostQuitMessage(0);
+      return(0);
+  }
+  return DefWindowProc(hWnd,uMsg,wParam,lParam);
+}