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jim678

directdraw

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does anyone know the complete code neededto display random pixels on the screen in fullscrean mode in a windows application..

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You can find that code in LaMothe's book "Tricks of the Windows game programing gurus".

krez: lol

Edited by - Askadar on December 9, 2001 3:19:58 PM

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i have that book and i have used that code but it wont work and when ever i compile i get these three errors.
C:\mssdk\samples\Multimedia\DDraw\src\DDex1\ddex1.cpp(39) : error C2146: syntax error : missing '';'' before identifier ''g_pDD''
C:\mssdk\samples\Multimedia\DDraw\src\DDex1\ddex1.cpp(39) : error C2501: ''LPDIRECTDRAW4'' : missing storage-class or type specifiers
C:\mssdk\samples\Multimedia\DDraw\src\DDex1\ddex1.cpp(39) : fatal error C1004: unexpected end of file found
Error executing cl.exe.

help me

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I already gave a solution for this on your other post, with the same tittle by the way.

Lamothe explains what to do so you dont get these errors on the book too, are you reading it or just compiling the code for fun?

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i am reading it. It might be that i dont have the right configuration for my compiler and i was wondering if you knew how to visual C++ up to compile programs with directX 6.

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by the way this is the code i am trying to compile.
//-----------------------------------------------------------------------------
// File: DDEx1.CPP
//
// Desc: Direct Draw example program 1. Creates a Direct Draw
// object and then a primary surface with a back buffer.
// Slowly flips between the primary surface and the back
// buffer. Press F12 to terminate the program.
//
// Copyright (c) 1995-1998 Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------

#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
//-----------------------------------------------------------------------------
// Include files
//-----------------------------------------------------------------------------
#include
#include
#include
#include
#include "resource.h"

//-----------------------------------------------------------------------------
// Local definitions
//-----------------------------------------------------------------------------
#define NAME "DDExample1"
#define TITLE "Direct Draw Example 1"

//-----------------------------------------------------------------------------
// Default settings
//-----------------------------------------------------------------------------
#define TIMER_ID 1
#define TIMER_RATE 500

//-----------------------------------------------------------------------------
// Global data
//-----------------------------------------------------------------------------
LPDIRECTDRAW4 g_pDD = NULL; // DirectDraw object
LPDIRECTDRAWSURFACE4 g_pDDSPrimary = NULL;// DirectDraw primary surface
LPDIRECTDRAWSURFACE4 g_pDDSBack = NULL; // DirectDraw back surface
BOOL g_bActive = FALSE; // Is application active?

//-----------------------------------------------------------------------------
// Local data
//-----------------------------------------------------------------------------
static char szMsg[] = "Page Flipping Test: Press F12 to exit";
static char szFrontMsg[] = "Front buffer (F12 to quit)";
static char szBackMsg[] = "Back buffer (F12 to quit)";




//-----------------------------------------------------------------------------
// Name: ReleaseAllObjects()
// Desc: Finished with all objects we use; release them
//-----------------------------------------------------------------------------
static void
ReleaseAllObjects(void)
{
if (g_pDD != NULL)
{
if (g_pDDSPrimary != NULL)
{
g_pDDSPrimary->Release();
g_pDDSPrimary = NULL;
}
g_pDD->Release();
g_pDD = NULL;
}
}




//-----------------------------------------------------------------------------
// Name: InitFail()
// Desc: This function is called if an initialization function fails
//-----------------------------------------------------------------------------
HRESULT
InitFail(HWND hWnd, HRESULT hRet, LPCTSTR szError,...)
{
char szBuff[128];
va_list vl;

va_start(vl, szError);
vsprintf(szBuff, szError, vl);
ReleaseAllObjects();
MessageBox(hWnd, szBuff, TITLE, MB_OK);
DestroyWindow(hWnd);
va_end(vl);
return hRet;
}




//-----------------------------------------------------------------------------
// Name: UpdateFrame()
// Desc: Displays the proper text for the page
//-----------------------------------------------------------------------------
static void
UpdateFrame(HWND hWnd)
{
static BYTE phase = 0;
HDC hdc;
DDBLTFX ddbltfx;
RECT rc;
SIZE size;

// Use the blter to do a color fill to clear the back buffer
ZeroMemory(&ddbltfx, sizeof(ddbltfx));
ddbltfx.dwSize = sizeof(ddbltfx);
ddbltfx.dwFillColor = 0;
g_pDDSBack->Blt(NULL, NULL, NULL, DDBLT_COLORFILL | DDBLT_WAIT, &ddbltfx);

if (g_pDDSBack->GetDC(&hdc) == DD_OK)
{
SetBkColor(hdc, RGB(0, 0, 255));
SetTextColor(hdc, RGB(255, 255, 0));
if (phase)
{
GetClientRect(hWnd, &rc);
GetTextExtentPoint(hdc, szMsg, lstrlen(szMsg), &size);
TextOut(hdc, (rc.right - size.cx) / 2, (rc.bottom - size.cy) / 2,
szMsg, sizeof(szMsg) - 1);
TextOut(hdc, 0, 0, szFrontMsg, lstrlen(szFrontMsg));
phase = 0;
}
else
{
TextOut(hdc, 0, 0, szBackMsg, lstrlen(szBackMsg));
phase = 1;
}
g_pDDSBack->ReleaseDC(hdc);
}
}




//-----------------------------------------------------------------------------
// Name: WindowProc()
// Desc: The Main Window Procedure
//-----------------------------------------------------------------------------
long FAR PASCAL
WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
HRESULT hRet;

switch (message)
{
case WM_ACTIVATEAPP:
// Pause if minimized or not the top window
g_bActive = (wParam == WA_ACTIVE) || (wParam == WA_CLICKACTIVE);
return 0L;

case WM_DESTROY:
// Clean up and close the app
ReleaseAllObjects();
PostQuitMessage(0);
return 0L;

case WM_KEYDOWN:
// Handle any non-accelerated key commands
switch (wParam)
{
case VK_ESCAPE:
case VK_F12:
PostMessage(hWnd, WM_CLOSE, 0, 0);
return 0L;
}
break;

case WM_SETCURSOR:
// Turn off the cursor since this is a full-screen app
SetCursor(NULL);
return TRUE;

case WM_TIMER:
// Update and flip surfaces
if (g_bActive && TIMER_ID == wParam)
{
UpdateFrame(hWnd);
while (TRUE)
{
hRet = g_pDDSPrimary->Flip(NULL, 0);
if (hRet == DD_OK)
break;
if (hRet == DDERR_SURFACELOST)
{
hRet = g_pDDSPrimary->Restore();
if (hRet != DD_OK)
break;
}
if (hRet != DDERR_WASSTILLDRAWING)
break;
}
}
break;
}
return DefWindowProc(hWnd, message, wParam, lParam);
}




//-----------------------------------------------------------------------------
// Name: InitApp()
// Desc: Do work required for every instance of the application:
// Create the window, initialize data
//-----------------------------------------------------------------------------
static HRESULT
InitApp(HINSTANCE hInstance, int nCmdShow)
{
HWND hWnd;
WNDCLASS wc;
DDSURFACEDESC2 ddsd;
DDSCAPS2 ddscaps;
HRESULT hRet;
LPDIRECTDRAW pDD;

// Set up and register window class
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = WindowProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_MAIN_ICON));
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH )GetStockObject(BLACK_BRUSH);
wc.lpszMenuName = NAME;
wc.lpszClassName = NAME;
RegisterClass(&wc);

// Create a window
hWnd = CreateWindowEx(WS_EX_TOPMOST,
NAME,
TITLE,
WS_POPUP,
0,
0,
GetSystemMetrics(SM_CXSCREEN),
GetSystemMetrics(SM_CYSCREEN),
NULL,
NULL,
hInstance,
NULL);
if (!hWnd)
return FALSE;
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);
SetFocus(hWnd);

///////////////////////////////////////////////////////////////////////////
// Create the main DirectDraw object
///////////////////////////////////////////////////////////////////////////
hRet = DirectDrawCreate(NULL, &pDD, NULL);
if (hRet != DD_OK)
return InitFail(hWnd, hRet, "DirectDrawCreate FAILED");

// Fetch DirectDraw4 interface
hRet = pDD->QueryInterface(IID_IDirectDraw4, (LPVOID *) & g_pDD);
if (hRet != DD_OK)
return InitFail(hWnd, hRet, "QueryInterface FAILED");

// Get exclusive mode
hRet = g_pDD->SetCooperativeLevel(hWnd, DDSCL_EXCLUSIVE | DDSCL_FULLSCREEN);
if (hRet != DD_OK)
return InitFail(hWnd, hRet, "SetCooperativeLevel FAILED");

// Set the video mode to 640x480x8
hRet = g_pDD->SetDisplayMode(640, 480, 8, 0, 0);
if (hRet != DD_OK)
return InitFail(hWnd, hRet, "SetDisplayMode FAILED");

// Create the primary surface with 1 back buffer
ZeroMemory(&ddsd, sizeof(ddsd));
ddsd.dwSize = sizeof(ddsd);
ddsd.dwFlags = DDSD_CAPS | DDSD_BACKBUFFERCOUNT;
ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE |
DDSCAPS_FLIP |
DDSCAPS_COMPLEX;
ddsd.dwBackBufferCount = 1;
hRet = g_pDD->CreateSurface(&ddsd, &g_pDDSPrimary, NULL);
if (hRet != DD_OK)
return InitFail(hWnd, hRet, "CreateSurface FAILED");

// Get a pointer to the back buffer
ddscaps.dwCaps = DDSCAPS_BACKBUFFER;
hRet = g_pDDSPrimary->GetAttachedSurface(&ddscaps, &g_pDDSBack);
if (hRet != DD_OK)
return InitFail(hWnd, hRet, "GetAttachedSurface FAILED");

// Create a timer to flip the pages
if (TIMER_ID != SetTimer(hWnd, TIMER_ID, TIMER_RATE, NULL))
return InitFail(hWnd, hRet, "SetTimer FAILED");

return DD_OK;
}




//-----------------------------------------------------------------------------
// Name: WinMain()
// Desc: Initialization, message loop
//-----------------------------------------------------------------------------
int PASCAL
WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
MSG msg;

if (InitApp(hInstance, nCmdShow) != DD_OK)
return FALSE;

while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}

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Oh Man! dont go around posting all that code, it is just not necesary, just read your compiler output:

C:\mssdk\samples\Multimedia\DDraw\src\DDex1\ddex1.cpp(39) : error C2146: syntax error : missing '';'' before identifier ''g_pDD''
C:\mssdk\samples\Multimedia\DDraw\src\DDex1\ddex1.cpp(39) : error C2501: ''LPDIRECTDRAW4'' : missing storage-class or type specifiers
C:\mssdk\samples\Multimedia\DDraw\src\DDex1\ddex1.cpp(39) : fatal error C1004: unexpected end of file found
Error executing cl.exe.

the (39) after ddex1.cpp means the problem is in line 39, if you double click this error in VC it will take you there, thats the line(s) you should post, maybe some before and some after that, just to make sure, not all the code because no body cares about ALL the code.

in this case I am guessing the line is

LPDIRECTDRAW4 g_pDD = NULL; // DirectDraw object

and with just that, you can tell you are using the header files that came with VC++, and not the ones from the DirectX SDK 6.0 (at least)

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And they wonder why we rip on newbies...



------------------------------
"I''m a decorated astronaut, I don''t make those kind of mistakes."
"Oh now wait a minute. Look I''ll show ya. I''ll enter the same calculations using what we like to call ''The Right Way''."

-Rem
Zirem Software

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