Original Post
A newbie to opengl, I am following this book "Beginning OpenGL Game Programming" which so far has me intimidated with the abundant win32 programming presented without any proper reference. The book asks to create a menu (give the user a graphical interface) to select either fullscreen/windowed mode. I apologize if this isn't the relevant subforum. //edit. okay this is the wrong forum, sorry :p I learned as much as quickly i could, and i have a basic understanding of it, the core at least. anyway, heres the problem. bool fullscreen=false; A globally declared flag which is sent to the window at the time of inception. ^^ This is the source immediately following the windowclass definitions. As i see it i have two options, to create a modeless dialog box which takes precedence over the window, and changes the values before the actual window is created. that was a failure. The 2nd one is to create a dialog box at the inception from the wm_create msg and according to the choices change the values, I did that. But now i cant seem to update the changes to my main window. I know we have the UpdateWindow(handle to window) but if it is right, where do i place it? ^^Creating the dialog box.And ending it when a choice has been selected. ^^where I do my processing within the main window msging function. I used UpdateWindow(NULL) in hopes that null refers to the parent window. Or is my fullscreen code constraining it, I don't get a thing of that particular thing, so bear with me. // I've finally looked up changedisplaysettings and DEVMODE, so I think that code is pretty much a unit. Don't think this is at fault. entire source: I used/created a resource template for the box layout. Help would be much appreciated! [Edited by - IwikiwI on August 17, 2008 6:51:48 AM]
if (fullscreen) // fullscreen?
{
DEVMODE dmScreenSettings; // device mode
memset(&dmScreenSettings,0,sizeof(dmScreenSettings));
dmScreenSettings.dmSize = sizeof(dmScreenSettings);
dmScreenSettings.dmPelsWidth = windowWidth; // screen width
dmScreenSettings.dmPelsHeight = windowHeight; // screen height
dmScreenSettings.dmBitsPerPel = windowBits; // bits per pixel
dmScreenSettings.dmFields=DM_BITSPERPEL|DM_PELSWIDTH|DM_PELSHEIGHT;
//
if (ChangeDisplaySettings(&dmScreenSettings, CDS_FULLSCREEN) != DISP_CHANGE_SUCCESSFUL)
{
// setting display mode failed, switch to windowed
MessageBox(NULL, "Display mode failed", NULL, MB_OK);
fullscreen = FALSE;
}
}
if (fullscreen) // Are We Still In Fullscreen Mode?
{
dwExStyle=WS_EX_APPWINDOW; // Window Extended Style
dwStyle=WS_POPUP; // Windows Style
ShowCursor(FALSE); // Hide Mouse Pointer
}
else
{
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
// class registered, so now create our window
BOOL CALLBACK AboutDlgProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam)
{
switch(Message)
{
case WM_INITDIALOG:
return TRUE;
case WM_COMMAND:
switch(LOWORD(wParam))
{
case ID1:
EndDialog(hwnd, ID1);
break;
case ID2:
EndDialog(hwnd, ID2);
break;
}
break;
default:
return FALSE;
}
return TRUE;
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
static HDC hDC;
static HGLRC hRC;
int height, width;
// dispatch messages
switch (uMsg)
{
case WM_COMMAND:
break;
case WM_CREATE:
{
int ret = DialogBox(GetModuleHandle(NULL),
MAKEINTRESOURCE(IDD_SCREEN), hWnd, AboutDlgProc);
if(ret == ID1){
fullscreen=false;
UpdateWindow(NULL);
}
else if(ret == ID2){
fullscreen=true;
UpdateWindow(NULL);
}
else if(ret == -1){
MessageBox(hWnd, "Dialog failed!", "Error",
MB_OK | MB_ICONINFORMATION);
}
}
#define WIN32_LEAN_AND_MEAN
#define WIN32_EXTRA_LEAN
#include <windows.h>
#include <gl/gl.h>
#include <gl/glu.h>
#include "resource.h"
#include "CGfxOpenGL.h"
bool exiting = false;
long windowWidth = 800;
long windowHeight = 600;
long windowBits = 32;
bool fullscreen=false;
HDC hDC;
//HWND g_hToolbar = NULL;
CGfxOpenGL *g_glRender = NULL;
BOOL CALLBACK AboutDlgProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam)
{
switch(Message)
{
case WM_INITDIALOG:
return TRUE;
case WM_COMMAND:
switch(LOWORD(wParam))
{
case ID1:
EndDialog(hwnd, ID1);
break;
case ID2:
EndDialog(hwnd, ID2);
break;
}
break;
default:
return FALSE;
}
return TRUE;
}
void SetupPixelFormat(HDC hDC)
{
int pixelFormat;
PIXELFORMATDESCRIPTOR pfd =
{
sizeof(PIXELFORMATDESCRIPTOR), // size
1, // version
PFD_SUPPORT_OPENGL | // OpenGL window
PFD_DRAW_TO_WINDOW | // render to window
PFD_DOUBLEBUFFER, // support double-buffering
PFD_TYPE_RGBA, // color type
32, // prefered color depth
0, 0, 0, 0, 0, 0, // color bits (ignored)
0, // no alpha buffer
0, // alpha bits (ignored)
0, // no accumulation buffer
0, 0, 0, 0, // accum bits (ignored)
16, // depth buffer
0, // no stencil buffer
0, // no auxiliary buffers
PFD_MAIN_PLANE, // main layer
0, // reserved
0, 0, 0, // no layer, visible, damage masks
};
pixelFormat = ChoosePixelFormat(hDC, &pfd);
SetPixelFormat(hDC, pixelFormat, &pfd);
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
static HDC hDC;
static HGLRC hRC;
int height, width;
// dispatch messages
switch (uMsg)
{
case WM_COMMAND:
break;
case WM_CREATE:
{
int ret = DialogBox(GetModuleHandle(NULL),
MAKEINTRESOURCE(IDD_SCREEN), hWnd, AboutDlgProc);
if(ret == ID1){
fullscreen=false;
UpdateWindow(NULL);
}
else if(ret == ID2){
fullscreen=true;
UpdateWindow(NULL);
}
else if(ret == -1){
MessageBox(hWnd, "Dialog failed!", "Error",
MB_OK | MB_ICONINFORMATION);
}
}
// window creation
// Other menu commands...
{
hDC = GetDC(hWnd);
SetupPixelFormat(hDC);
//SetupPalette();
hRC = wglCreateContext(hDC);
wglMakeCurrent(hDC, hRC);
break;
}
case WM_DESTROY: // window destroy
case WM_QUIT:
case WM_CLOSE: // windows is closing
// deselect rendering context and delete it
wglMakeCurrent(hDC, NULL);
wglDeleteContext(hRC);
// send WM_QUIT to message queue
PostQuitMessage(0);
break;
case WM_SIZE:
height = HIWORD(lParam); // retrieve width and height
width = LOWORD(lParam);
g_glRender->SetupProjection(width, height);
break;
case WM_ACTIVATEAPP: // activate app
break;
case WM_PAINT: // paint
PAINTSTRUCT ps;
BeginPaint(hWnd, &ps);
EndPaint(hWnd, &ps);
break;
case WM_LBUTTONDOWN: // left mouse button
break;
case WM_RBUTTONDOWN: // right mouse button
break;
case WM_MOUSEMOVE: // mouse movement
break;
case WM_LBUTTONUP: // left button release
break;
case WM_RBUTTONUP: // right button release
break;
case WM_KEYUP:
break;
case WM_KEYDOWN:
int fwKeys;
LPARAM keyData;
fwKeys = (int)wParam; // virtual-key code
keyData = lParam; // key data
switch(fwKeys)
{
case VK_ESCAPE:
PostQuitMessage(0);
break;
default:
break;
}
break;
default:
break;
}
return DefWindowProc(hWnd, uMsg, wParam, lParam);
}
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd)
{
WNDCLASSEX windowClass; // window class
HWND hwnd; // window handle
MSG msg; // message
DWORD dwExStyle; // Window Extended Style
DWORD dwStyle; // Window Style
RECT windowRect;
g_glRender = new CGfxOpenGL;
windowRect.left=(long)0; // Set Left Value To 0
windowRect.right=(long)windowWidth; // Set Right Value To Requested Width
windowRect.top=(long)0; // Set Top Value To 0
windowRect.bottom=(long)windowHeight; // Set Bottom Value To Requested Height
// fill out the window class structure
windowClass.cbSize = sizeof(WNDCLASSEX);
windowClass.style = CS_HREDRAW | CS_VREDRAW;
windowClass.lpfnWndProc = WndProc;
windowClass.cbClsExtra = 0;
windowClass.cbWndExtra = 0;
windowClass.hInstance = hInstance;
windowClass.hIcon = LoadIcon(NULL, IDI_APPLICATION); // default icon
windowClass.hCursor = LoadCursor(NULL, IDC_ARROW); // default arrow
windowClass.hbrBackground = NULL; // don't need background
windowClass.lpszMenuName = NULL; // no menu
windowClass.lpszClassName = "GLClass";
windowClass.hIconSm = LoadIcon(NULL, IDI_WINLOGO); // windows logo small icon
// register the windows class
if (!RegisterClassEx(&windowClass))
return 0;
if (fullscreen) // fullscreen?
{
DEVMODE dmScreenSettings; // device mode
memset(&dmScreenSettings,0,sizeof(dmScreenSettings));
dmScreenSettings.dmSize = sizeof(dmScreenSettings);
dmScreenSettings.dmPelsWidth = windowWidth; // screen width
dmScreenSettings.dmPelsHeight = windowHeight; // screen height
dmScreenSettings.dmBitsPerPel = windowBits; // bits per pixel
dmScreenSettings.dmFields=DM_BITSPERPEL|DM_PELSWIDTH|DM_PELSHEIGHT;
//
if (ChangeDisplaySettings(&dmScreenSettings, CDS_FULLSCREEN) != DISP_CHANGE_SUCCESSFUL)
{
// setting display mode failed, switch to windowed
MessageBox(NULL, "Display mode failed", NULL, MB_OK);
fullscreen = FALSE;
}
}
if (fullscreen) // Are We Still In Fullscreen Mode?
{
dwExStyle=WS_EX_APPWINDOW; // Window Extended Style
dwStyle=WS_POPUP; // Windows Style
ShowCursor(FALSE); // Hide Mouse Pointer
}
else
{
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
// class registered, so now create our window
hwnd = CreateWindowEx(NULL, // extended style
"GLClass", // class name
"OpenGL Application", // app name
dwStyle | WS_CLIPCHILDREN |
WS_CLIPSIBLINGS,
0, 0, // x,y coordinate
windowRect.right - windowRect.left,
windowRect.bottom - windowRect.top, // width, height
NULL, // handle to parent
NULL, // handle to menu
hInstance, // application instance
NULL);
// no extra params
hDC = GetDC(hwnd);
// check if window creation failed (hwnd would equal NULL)
if (!hwnd)
return 0;
ShowWindow(hwnd, SW_SHOW); // display the window
UpdateWindow(hwnd); // update the window
g_glRender->Init();
while (!exiting)
{
g_glRender->Prepare(0.0f);
g_glRender->Render();
SwapBuffers(hDC);
while (PeekMessage (&msg, NULL, 0, 0, PM_NOREMOVE))
{
if (!GetMessage (&msg, NULL, 0, 0))
{
exiting = true;
break;
}
TranslateMessage (&msg);
DispatchMessage (&msg);
UpdateWindow(hwnd);
}
}
delete g_glRender;
if (fullscreen)
{
ChangeDisplaySettings(NULL,0); // If So Switch Back To The Desktop
ShowCursor(TRUE); // Show Mouse Pointer
}
return (int)msg.wParam;
}