Heya!
I've been trying to code this DirectX 7 app (it only uses DirectDraw) but for some reason the primary surface doesn't show... The resolution changes, but still the regular GDI shows... I've checked the return values from CreateSurface and GetAttachedSurface but they both return 0 (DD_OK)...
Also...
The program doesn't properly shutdown. The window gets destroyed and the program's icon is removed from the taskbar, but after closing the CTRL-ALT-DEL menu says a program called "Directx" is still running, and when I recompile I get a linker error saying it can't write to the .exe file...?
Here's the (only) source-file, there are extra comments in it...
//-------------------------------------------------------------------------------------------
// Defines
//-------------------------------------------------------------------------------------------
#define WIN32_LEAN_AND_MEAN // leave out MFC stuff
#define DIRECTDRAW_VERSION 0x0700 // Use DirectX 7
//-------------------------------------------------------------------------------------------
// Includes
//-------------------------------------------------------------------------------------------
#include <windows.h> // includes windows.h
#include <ddraw.h> // includes ddraw.h
//-------------------------------------------------------------------------------------------
// Globals
//-------------------------------------------------------------------------------------------
struct
{
char szTitle[33];
DWORD dwWidth;
DWORD dwHeight;
DWORD dwBPP;
LPDIRECTDRAW7 lpDD;
LPDIRECTDRAWSURFACE7 lpDDSPrimary;
LPDIRECTDRAWSURFACE7 lpDDSBack;
DDSURFACEDESC2 ddSurfDesc;
DDSCAPS2 ddSurfCaps;
} g;
//-------------------------------------------------------------------------------------------
// Function Prototypes
//-------------------------------------------------------------------------------------------
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int iShowCmd);
LRESULT CALLBACK WndProc(HWND hWnd, UINT iMsg, WPARAM wParam, LPARAM lParam);
int mbprintf(UINT iStyle, char * szCaption, char * szFormat, ...);
int InitDD(HWND hWnd, DWORD dwWidth, DWORD dwHeight, DWORD dwBPP);
void TermDD();
void MainLoop();
//-------------------------------------------------------------------------------------------
// Function Implementations
//-------------------------------------------------------------------------------------------
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int iShowCmd)
{
// Partially fill global struct with required values
strcpy(g.szTitle, "DirectX Tryout"); // Window title and classname
g.dwWidth = 800; // Horizontal resolution
g.dwHeight = 600; // Vertical res.
g.dwBPP = 32; // Bits per pixel
// Create and register window class
WNDCLASSEX wc;
wc.cbSize = sizeof(wc);
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
wc.lpszMenuName = NULL;
wc.lpszClassName = g.szTitle;
wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
RegisterClassEx(&wc);
// Create window based on window class and show it
HWND hWnd = CreateWindowEx(NULL, (char *)&g.szTitle, (char *)&g.szTitle, WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_MINIMIZEBOX, CW_USEDEFAULT, CW_USEDEFAULT, (int)g.dwWidth, (int)g.dwHeight, NULL, NULL, hInstance, NULL);
ShowWindow(hWnd, iShowCmd);
// Initialize DirectDraw!
int iddRet = InitDD(hWnd, g.dwWidth, g.dwHeight, g.dwBPP);
// iddRet = -2; // I put this in for testing purposes, but I noticed that when I use this
// the string "Directx" doesn't show up in the CTRL-ALT-DEL menu
// after program termination!! This ofcourse leads me to believe that the
// error occurs either in the messageloop or in the WndProc, but I have absolutely
// no idea what exactly the error is...
if(iddRet)
{
switch(iddRet)
{
case -1:
mbprintf(MB_ICONERROR, g.szTitle, "Couldn't initialize DirectDraw! You need DirectX 7 or higher to run this application.");
return 0;
case -2:
mbprintf(MB_ICONERROR, g.szTitle, "Couldn't set DirectDraw to exclusive fullscreen mode! Please close all other DirectX applications or install updated drivers for your videocard.");
TermDD();
return 0;
case -3:
mbprintf(MB_ICONERROR, g.szTitle, "Couldn't set another resolution! Please close all other DirectX applications, check your videocard's settings or install updated drivers.");
TermDD();
return 0;
case -4:
mbprintf(MB_ICONERROR, g.szTitle, "Couldn't create primary surface! Either you don't have enough memory or your videocard is horribly out of date.");
TermDD();
return 0;
case -5:
mbprintf(MB_ICONERROR, g.szTitle, "Couldn't retrieve a pointer to the backbuffer. Are you sure you have enough memory to run this application?");
TermDD();
return 0;
}
}
// Enter messageloop!
MSG msg;
while(true)
{
if(PeekMessage(&msg, hWnd, NULL, NULL, PM_NOREMOVE)) // There is a message waiting
{
if(GetMessage(&msg, NULL, NULL, NULL)) // Message isn't WM_QUIT, so process it
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
else // Message was WM_QUIT, time to exit!
{
break;
}
}
else // No message waiting, so call main loop
{
MainLoop();
}
}
/*
while(GetMessage(&msg, NULL, NULL, NULL))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
*/
// Terminate and release DirectDraw object
TermDD();
return msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
{
switch (iMsg) // Check message
{
case WM_DESTROY: // Uh oh! Time to Quit!
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hWnd, iMsg, wParam, lParam);
}
int mbprintf(UINT iStyle, char * szCaption, char * szFormat, ...) // NEW! In stores now! MessageBox() function with added printf() functionality!
{
char szBuffer[1024];
va_list pArgList;
va_start(pArgList, szFormat);
wvsprintf(szBuffer, szFormat, pArgList);
return MessageBox(NULL, szBuffer, szCaption, iStyle);
}
int InitDD(HWND hWnd, DWORD dwWidth, DWORD dwHeight, DWORD dwBPP)
{
HRESULT ddReturn = NULL;
// Create DirectDraw object
DirectDrawCreateEx(NULL, (void **)&g.lpDD, IID_IDirectDraw7, NULL);
if (ddReturn != DD_OK) return -1;
// Set DD object to exclusive fullscreen mode
ddReturn = g.lpDD->SetCooperativeLevel(hWnd, DDSCL_EXCLUSIVE | DDSCL_FULLSCREEN);
if (ddReturn != DD_OK) return -2;
// Set requested displaymode
ddReturn = g.lpDD->SetDisplayMode(dwWidth, dwHeight, dwBPP, 0, 0);
if (ddReturn != DD_OK) return -3;
// Create primary surface with 1 backbuffer
ZeroMemory(&g.ddSurfDesc, sizeof(g.ddSurfDesc));
g.ddSurfDesc.dwSize = sizeof(g.ddSurfDesc);
g.ddSurfDesc.dwFlags = DDSD_CAPS | DDSD_BACKBUFFERCOUNT;
g.ddSurfDesc.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE | DDSCAPS_FLIP | DDSCAPS_COMPLEX;
g.ddSurfDesc.dwBackBufferCount = 1;
ddReturn = g.lpDD->CreateSurface(&g.ddSurfDesc, &g.lpDDSPrimary, NULL);
if(ddReturn != DD_OK) return -4;
// Get backbuffer surface pointer
ZeroMemory(&g.ddSurfCaps, sizeof(g.ddSurfCaps));
g.ddSurfCaps.dwCaps = DDSCAPS_BACKBUFFER;
ddReturn = g.lpDDSPrimary->GetAttachedSurface(&g.ddSurfCaps, &g.lpDDSBack);
if (ddReturn != DD_OK) return -5;
return 0;
}
void TermDD() // No need to comment this, it kind of speaks for itself ;)
{
if (g.lpDD)
{
if (g.lpDDSPrimary)
{
g.lpDDSPrimary->Release();
g.lpDDSPrimary = NULL;
}
g.lpDD->RestoreDisplayMode();
g.lpDD->Release();
g.lpDD = NULL;
}
}
void MainLoop()
{
}
[edited by - MainForze on January 8, 2003 9:04:20 AM]
"It's strange, isn't it? You stand in the middle of a library and go 'AAAAAAAGGHHHH' and everyone just stares at you. But you do the same thing on an airplane, and everyone joins in!"
