Thread: need help with some DX stuff

Okay, as always, I am slowly trudging along learning DX bit by bit, while using my book Real Time Strategy Game Programming with MS DirectX.

I have come to a small problem while trying to load targa files into my app. Everything has worked fine before this. For some reason as I try to load the targa file and display it, it freezes the whole program, and for some reason also does not let me Alt+Tab or Ctrl+Alt+Del out of the program, so I have to reboot my computer every time.

Here is all code that is relevant to the problem:

Code:

//winshell.cpp
#include "screen.h"
#include "dirdraw.h"
#include "winshell.h"

DWORD WINAPI RedrawScreen (LPVOID lpvParm);
DWORD WINAPI UpdateProc (LPVOID lpvParm);
DWORD WINAPI HandleEvents (LPVOID lpvParm);

void InitLoops ( );
void CleanupLoops ( );

BOOL ActiveApp;// is the program active?
static HWND WindowHandle;

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
        LPSTR lpCmdLine, int nCmdShow)
{
    MSG         msg;
    HWND        hwnd;
	
	//DRAWING_MANAGERptr Draw;	
	DIRECT_DRAW_MANAGER *DDraw;
	
	bool FullScreenFlag = /*false;*/true;
	int SCREEN_WIDTH = 640, SCREEN_HEIGHT = 480;
	InitLoops();

    hPrevInstance = hPrevInstance;// avoid C++ warning

    // here we instantiate the direct draw object
	DDraw = new DIRECT_DRAW_MANAGER;
	hwnd = DDraw->CreateMainWindow(SCREEN_WIDTH, SCREEN_HEIGHT, 
				"Generic Name", MessageLoop, hInstance, 
				FullScreenFlag);
	//Draw = new DRAWING_MANAGER (SCREEN_WIDTH, SCREEN_HEIGHT,
	//					MessageLoop, hInstance, FullScreenFlag);
	//hwnd = (HWND)Draw->GetWindowHandle();
	//Draw->MousePointerPrepare();

	//if (!hwnd) {delete Draw; return FALSE;}	
	if(!hwnd) { delete DDraw; return FALSE; }

    while(1)
    {
        int t = PeekMessage(&msg, NULL, 0U, 0U, PM_NOREMOVE);
        if (t)
        {
            if (!GetMessage (& msg, NULL, 0, 0))
            return msg.wParam;
            TranslateMessage (&msg);
            DispatchMessage (&msg);
        }
        
        else if (ActiveApp)// this is important here
		{	
			//RedrawScreen ((LPVOID) Draw);
			RedrawScreen((LPVOID) DDraw);
		}
        else if (!ActiveApp)
         WaitMessage();
    }
	//delete Draw; 
	delete DDraw;
	CleanupLoops();
	return 1;
}
//winmain
void* GetWindowHandle(void)
{
    return (void*)WindowHandle;
}

void  ErrorMessage (char* str)
{
	MessageBox (WindowHandle, str, "Error", MB_OK);
	DestroyWindow (WindowHandle);
}


// loops.cpp
#include "dirdraw.h"
#include "alphabet.h"
#include "graphic.h"

int frame = 0;
int time =0, timelast=0;
int count = 0;
ALPHABET_MANAGER alpha;

GRAPHIC *Graphic = NULL;

void Draw ( DIRECT_DRAW_MANAGER *DDraw );

void InitLoops ( )
{
	int NoExternalScratchPad = 1;
	int compress = 1;
	Graphic = new GRAPHIC (NoExternalScratchPad);
	STRINGC str = "Test.tga";
	Graphic->Load(str, compress);	
}

void CleanupLoops ( )
{
	if(Graphic)
	{
		if(Graphic)
			delete Graphic;
	}
}

DWORD WINAPI RedrawScreen (LPVOID Parm)
{	
	DIRECT_DRAW_MANAGER *DDraw = (DIRECT_DRAW_MANAGER *) Parm;
	
	if (DDraw == NULL) return 1;
	
	time = timeGetTime();// get the current millisec
	count++; 
	if (time-timelast>=1000)
	{
		frame = count;
		timelast=time;// update time
		count=0;
	}
	char buff[40];
	itoa(frame, buff, 10);
		
	while(DDraw->DrawFrame());

	DDraw->ClearBackBuffer();
	
	Draw(DDraw);	

	DDraw->PaintText(20, 20, buff);	

	return 0;
}

void Draw ( DIRECT_DRAW_MANAGER *DDraw )
{
	SCREEN_STRUCT *screen = DDraw->GetScreen();

	char buff[100];
	long time1 = timeGetTime();

	Graphic->DrawAt(screen, rand()%630+5, rand()%470+5);
		
	long time2 = timeGetTime();
	long result = time2-time1;

	itoa(result, buff, 10);

	alpha.PrintText(60, 60, screen, buff);
}

//one function from graphic.cpp
bool  GRAPHIC:: Load (STRINGC& str, bool CompressFlag)// load by filename and convert to 16 bit compressed
{
	flags.Flag.COMPRESSED = (U16)CompressFlag;// make sure we have this flag

	if (!flags.Flag.NO_SCRATCH_PAD && ScratchPad == NULL) return false;
	if (Image != NULL) {delete Image; Image = NULL;}
	SetPath (str);

	if (FileType == LLE) return LoadLLE();
    if (FileType == TGA) return LoadTGA();
    if (FileType != BMP) return false;

	// bmp by default
	BITMAPFILEHEADER Header;
	BITMAPINFOHEADER Info;

    //*************** assumes a BMP for now ***********************
	FILE_MASTER		 file (str, FILE_MASTER:: READ);
	if (file.Status() != FILE_MASTER::NONE) return false;

	if (file.Read (&Header, sizeof (BITMAPFILEHEADER))) {return false;}
	if (file.Read (&Info, sizeof (BITMAPINFOHEADER))) {return false; }

    Height = (U16) Info.biHeight, Width = (U16) Info.biWidth;
	if (Info.biBitCount == 16) return false;// we do not support 16 bit bitmaps

	if (flags.Flag.NO_SCRATCH_PAD && ScratchPad) delete ScratchPad;

	if (flags.Flag.NO_SCRATCH_PAD) ScratchPad = new U16 [2*Height*Width];

    if (Info.biBitCount == 24) if (Load24Bit(&file)==false) return false;
	if (Info.biBitCount == 8) if (Load8Bit(&file, Info.biClrUsed)==false) return false;
	if (Info.biBitCount == 4) if (Load4Bit(&file, Info.biClrUsed)==false) return false;
	if (Info.biBitCount != 1)
	{
		if (CompressFlag == true) 
			Image = LLECompression16Bit (ScratchPad, Width, Height, &NumPixels);
		else
		{
			Image = CopyScratchPadIntoImage ();
			NumPixels = Width*Height;
		}
	}

    //***************
    flags.Flag.LOADED = true;
	if (flags.Flag.NO_SCRATCH_PAD && ScratchPad) 
	{
		delete ScratchPad;
		ScratchPad = NULL;
	}

	return true;
}

I tried uploading all of the code in a .zip file, but it was about 50kb too big...so if you want to see all of the code email me and i will send you a zip file of the project...the zip is about 160 kb large. I am using VC++.

Thanx for any help. (Sunlight would be very helpful right about now...when is that guy gonna come back...)