#include //#include #include "main.h" #ifdef GCC #include #endif static HDC hDC=NULL; // Private GDI Device Context static HGLRC hRC=NULL; // Permanent Rendering Context static HWND hWnd=NULL; // Holds Our Window Handle static HINSTANCE hInstance; // Holds The Instance Of The Application #ifdef DEBUG void MSG_DBG(const char *szString) { ::OutputDebugString(szString); } #else #define MSG_DBG(x) #endif static LRESULT CALLBACK WndProc( HWND hWnd, // Handle For This Window UINT uMsg, // Message For This Window WPARAM wParam, // Additional Message Information LPARAM lParam) // Additional Message Information { switch (uMsg) // Check For Windows Messages { case WM_CLOSE: // Did We Receive A Close Message? { PostQuitMessage(0); // Send A Quit Message return 0; // Jump Back } } // Pass All Unhandled Messages To DefWindowProc return DefWindowProc(hWnd, uMsg, wParam, lParam); } GLvoid KillGLWindow(GLvoid) // Properly Kill The Window { if (hRC) // Do We Have A Rendering Context? { if (!wglMakeCurrent(NULL, NULL)) // Are We Able To Release The DC And RC Contexts? { MSG_DBG("Release Of DC And RC Failed."); } if (!wglDeleteContext(hRC)) // Are We Able To Delete The RC? { MSG_DBG("Release Rendering Context Failed."); } hRC=NULL; // Set RC To NULL } if (hDC && !ReleaseDC(hWnd, hDC)) // Are We Able To Release The DC { MSG_DBG("Release Device Context Failed."); hDC=NULL; // Set DC To NULL } if (hWnd && !DestroyWindow(hWnd)) // Are We Able To Destroy The Window? { MSG_DBG("Could Not Release hWnd."); hWnd=NULL; // Set hWnd To NULL } if (!UnregisterClass("OpenGL", hInstance)) // Are We Able To Unregister Class { MSG_DBG("Could Not Unregister Class."); hInstance=NULL; // Set hInstance To NULL } } /* This Code Creates Our OpenGL Window. Parameters Are: * * title - Title To Appear At The Top Of The Window * * width - Width Of The GL Window Or Fullscreen Mode * * height - Height Of The GL Window Or Fullscreen Mode * * fullscreenflag - Use Fullscreen Mode (TRUE) Or Windowed Mode (FALSE) */ BOOL CreateGLWindow(const char* title, int width, int height) { static PIXELFORMATDESCRIPTOR pfd = // pfd Tells Windows How We Want Things To Be { sizeof(PIXELFORMATDESCRIPTOR), // Size Of This Pixel Format Descriptor 1, // Version Number PFD_DRAW_TO_WINDOW | // Format Must Support Window PFD_SUPPORT_OPENGL | // Format Must Support OpenGL PFD_DOUBLEBUFFER, // Must Support Double Buffering PFD_TYPE_RGBA, // Request An RGBA Format 32, // Select Our Color Depth 0, 0, 0, 0, 0, 0, // Color Bits Ignored 0, // No Alpha Buffer 0, // Shift Bit Ignored 0, // No Accumulation Buffer 0, 0, 0, 0, // Accumulation Bits Ignored 24, // 16Bit Z-Buffer (Depth Buffer) 0, // No Stencil Buffer 0, // No Auxiliary Buffer PFD_MAIN_PLANE, // Main Drawing Layer 0, // Reserved 0, 0, 0 // Layer Masks Ignored }; GLuint PixelFormat; // Holds The Results After Searching For A Match WNDCLASS wc; // Windows Class Structure DWORD dwExStyle; // Window Extended Style DWORD dwStyle; // Window Style RECT WindowRect; // Grabs Rectangle Upper Left / Lower Right Values WindowRect.left = (long)0; // Set Left Value To 0 WindowRect.right = (long)width; // Set Right Value To Requested Width WindowRect.top = (long)0; // Set Top Value To 0 WindowRect.bottom = (long)height; // Set Bottom Value To Requested Height hInstance = GetModuleHandle(NULL); // Grab An Instance For Our Window wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC; // Redraw On Size, And Own DC For Window. wc.lpfnWndProc = (WNDPROC) WndProc; // WndProc Handles Messages wc.cbClsExtra = 0; // No Extra Window Data wc.cbWndExtra = 0; // No Extra Window Data wc.hInstance = hInstance; // Set The Instance wc.hIcon = LoadIcon(NULL, IDI_WINLOGO); // Load The Default Icon wc.hCursor = LoadCursor(NULL, IDC_ARROW); // Load The Arrow Pointer wc.hbrBackground = NULL; // No Background Required For GL wc.lpszMenuName = NULL; // We Don't Want A Menu wc.lpszClassName = "OpenGL"; // Set The Class Name if (!RegisterClass(&wc)) // Attempt To Register The Window Class { MSG_DBG("Failed To Register The Window Class."); return FALSE; // Return FALSE } dwExStyle=WS_EX_APPWINDOW | WS_EX_WINDOWEDGE; // Window Extended Style dwStyle=WS_OVERLAPPEDWINDOW; // Windows Style AdjustWindowRectEx(&WindowRect, dwStyle, FALSE, dwExStyle); // Adjust Window To True Requested Size // Create The Window if (!(hWnd=CreateWindowEx( dwExStyle, // Extended Style For The Window wc.lpszClassName, // Class Name title, // Window Title dwStyle | // Defined Window Style WS_CLIPSIBLINGS | // Required Window Style WS_CLIPCHILDREN, // Required Window Style 0, 0, // Window Position WindowRect.right-WindowRect.left, // Calculate Window Width WindowRect.bottom-WindowRect.top, // Calculate Window Height NULL, // No Parent Window NULL, // No Menu hInstance, // Instance NULL))) // Dont Pass Anything To WM_CREATE { KillGLWindow(); // Reset The Display MSG_DBG("Window Creation Error."); return FALSE; // Return FALSE } if (!(hDC=GetDC(hWnd))) // Did We Get A Device Context? { KillGLWindow(); // Reset The Display MSG_DBG("Can't Create A GL Device Context."); return FALSE; // Return FALSE } if (!(PixelFormat=ChoosePixelFormat(hDC, &pfd))) // Did Windows Find A Matching Pixel Format? { KillGLWindow(); // Reset The Display MSG_DBG("Can't Find A Suitable PixelFormat."); return FALSE; // Return FALSE } if(!SetPixelFormat(hDC, PixelFormat, &pfd)) // Are We Able To Set The Pixel Format? { KillGLWindow(); // Reset The Display MSG_DBG("Can't Set The PixelFormat."); return FALSE; // Return FALSE } if (!(hRC=wglCreateContext(hDC))) // Are We Able To Get A Rendering Context? { KillGLWindow(); // Reset The Display MSG_DBG("Can't Create A GL Rendering Context."); return FALSE; // Return FALSE } if(!wglMakeCurrent(hDC, hRC)) // Try To Activate The Rendering Context { KillGLWindow(); // Reset The Display MSG_DBG("Can't Activate The GL Rendering Context."); return FALSE; // Return FALSE } return TRUE; // Success }