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Guest Anonymous Poster

I'm baaack! I need your help again.. please?

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Guest Anonymous Poster
Ok Im back again! Thanks for all your help on the last one again. OK this time I have moved on to the Blitter, Im still using the Windows Guru book but its not helping me.
All I want to do is load the bmp haha.bmp (dont ask) onto a backsurface then blit it on to the backbuffer and flip. When I run this code below it does the intro then when it comes to the blit part it seems to load the bmp then for some odd reason the code cuts my screen in 4 pieces!!?? It draws the bmp twice,once in the upper left and once upper right. then the bottom half of the screen is black. I have no clue whats wrong.
Im using a TNT video card. Oh by the way the first part of the program (the intro part works without a hitch) thanks again guys I owe you my life here is the code:

// DEMO7_5.CPP 8-bit page flipping demo

// INCLUDES ///////////////////////////////////////////////

#define WIN32_LEAN_AND_MEAN // just say no to MFC

#define INITGUID

#include // include important windows stuff
#include
#include
#include // include important C/C++ stuff
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include

#include // include directdraw

// DEFINES ////////////////////////////////////////////////

// defines for windows
#define WINDOW_CLASS_NAME "WINCLASS1"

// default screen size
#define SCREEN_WIDTH 800 // size of screen
#define SCREEN_HEIGHT 600
#define SCREEN_BPP 16 // bits per pixel

// TYPES //////////////////////////////////////////////////////

// basic unsigned types
typedef unsigned short USHORT;
typedef unsigned short WORD;
typedef unsigned char UCHAR;
typedef unsigned char BYTE;


// container structure for bitmaps .BMP file
typedef struct BITMAP_FILE_TAG
{
BITMAPFILEHEADER bitmapfileheader; // this contains the bitmapfile header
BITMAPINFOHEADER bitmapinfoheader; // this is all the info including the palette
UCHAR *buffer; // this is a pointer to the data

} BITMAP_FILE, *BITMAP_FILE_PTR;

typedef struct KNIGHT_OBJ_TYPE
{
LPDIRECTDRAWSURFACE4 frames[3]; //3 frames of animation
int x,y; //position of KNIGHT
int current_frame; //current frame of animation
int counter; //used to time animation
int width;
int height;
float scale; //scale of object
} KNIGHT_OBJ, *KNIGHT_OBJ_PTR;

// PROTOTYPES //////////////////////////////////////////////

int Flip_Bitmap(UCHAR *image, int bytes_per_line, int height);

int Load_Bitmap_File(BITMAP_FILE_PTR bitmap, char *filename);

int Unload_Bitmap_File(BITMAP_FILE_PTR bitmap);

int DDraw_Fill_Surface(LPDIRECTDRAWSURFACE4 lpdds, int color);

int Scan_Image_Bitmap(BITMAP_FILE_PTR bitmap, LPDIRECTDRAWSURFACE4 lpdds, int cx, int cy);

LPDIRECTDRAWSURFACE4 DDraw_Create_Surface(int width, int height, int mem_flags, int color_key);

int DDraw_Draw_Surface(LPDIRECTDRAWSURFACE4 source, int x, int y,
int width, int height, LPDIRECTDRAWSURFACE4 dest,
int transparent);

// MACROS /////////////////////////////////////////////////

#define KEYDOWN(vk_code) ((GetAsyncKeyState(vk_code) & 0x8000) ? 1 : 0)
#define KEYUP(vk_code) ((GetAsyncKeyState(vk_code) & 0x8000) ? 0 : 1)
#define BITMAP_ID 0x4D42 // universal id for a bitmap

// initializes a direct draw struct
#define DDRAW_INIT_STRUCT(ddstruct) { memset(&ddstruct,0,sizeof(ddstruct)); ddstruct.dwSize=sizeof(ddstruct); }


// this builds a 16 bit color value in 5.6.5 format (green dominate mode)
#define _RGB16BIT565(r,g,b) ((b%32) + ((g%64) << 6) + ((r%32) << 11))

// GLOBALS ////////////////////////////////////////////////
HWND main_window_handle = NULL; // globally track main window
int window_closed = 0; // tracks if window is closed
HINSTANCE hinstance_app = NULL; // globally track hinstance

// directdraw stuff
LPDIRECTDRAW4 lpdd = NULL; // dd4 object
LPDIRECTDRAWSURFACE4 lpddsprimary = NULL; // dd primary surface
LPDIRECTDRAWSURFACE4 lpddsback = NULL; // dd back surface
LPDIRECTDRAWPALETTE lpddpal = NULL; // a pointer to the created dd palette
LPDIRECTDRAWCLIPPER lpddclipper = NULL; // dd clipper
DDSURFACEDESC2 ddsd; // a direct draw surface description struct
DDBLTFX ddbltfx;
DDSCAPS ddscaps;
HRESULT ddrval; // result back from dd calls
BITMAP_FILE bitmap; // holds the bitmap

KNIGHT_OBJ knight[3]; // The player

LPDIRECTDRAWSURFACE4 lpddsbackground = NULL;// holds the background image

char buffer[80]; // general printing buffer

int gwidth = -1 ;
int gheight = -1 ;

// FUNCTIONS //////////////////////////////////////////////


int DDraw_Fill_Surface(LPDIRECTDRAWSURFACE4 lpdds, int color)
{
DDBLTFX ddbltfx; //contains DDBLTFX struct

//clear and set size
DDRAW_INIT_STRUCT(ddbltfx);

//set the dwfillcolor to the color
ddbltfx.dwFillColor = _RGB16BIT565(0,0,0);

//ready to blt to surface
lpdds->Blt(NULL,
NULL,
NULL,
DDBLT_COLORFILL | DDBLT_WAIT,
&ddbltfx); //ptr to DDBLTFX structure
//return success
return(1);
} //end of DDraw FILL SURFACE


///////////////////////////////////////////////////////////////


int DDraw_Draw_Surface(LPDIRECTDRAWSURFACE4 source,
int x, int y,
int width, int height,
LPDIRECTDRAWSURFACE4 dest,
int transparent = 1)

{

RECT dest_rect,
source_rect;


// fill in the dest rect
dest_rect.left = x;
dest_rect.top = y;
dest_rect.right = 800; //width - 1;
dest_rect.bottom = 600; //y+height - 1;

// fill in the source rect
source_rect.left = 0;
source_rect.top = 0;
source_rect.right = 800; //width - 1;
source_rect.bottom = 600; //y+height -1;

if (transparent)
{
//enable color key blt
//blt to dest surface
if (FAILED(dest->Blt(&dest_rect, source,
&source_rect,(DDBLT_WAIT | DDBLT_KEYSRC),
NULL)))
return(0);
} //end if
else
{
if (FAILED(dest->Blt(&dest_rect, source,
&source_rect,(DDBLT_WAIT),
NULL)))
return(0);
} //end if

// return success
return(1);

} //end DDraw_Draw_Surfacc


///////////////////////////////////////////////////////////////////

int Scan_Image_Bitmap(BITMAP_FILE_PTR bitmap, // bitmap file to scan image data from
LPDIRECTDRAWSURFACE4 lpdds, // surface to hold data
int cx, int cy) // cell to scan image from
{
// this function extracts a bitmap out of a bitmap file

UCHAR *source_ptr, // working pointers
*dest_ptr;

DDSURFACEDESC2 ddsd; // direct draw surface description

// get the addr to destination surface memory

// set size of the structure
ddsd.dwSize = sizeof(ddsd);

// lock the display surface
lpdds->Lock(NULL,
&ddsd,
DDLOCK_WAIT | DDLOCK_SURFACEMEMORYPTR,
NULL);

// compute position to start scanning bits from
cx = cx*(ddsd.dwWidth+1) + 1;
cy = cy*(ddsd.dwHeight+1) + 1;

gwidth = ddsd.dwWidth;
gheight = ddsd.dwHeight;

// extract bitmap data
source_ptr = bitmap->buffer + cy*bitmap->bitmapinfoheader.biWidth+cx;

// assign a pointer to the memory surface for manipulation
dest_ptr = (UCHAR *)ddsd.lpSurface;

// iterate thru each scanline and copy bitmap
for (int index_y=0; index_y < ddsd.dwHeight; index_y++)
{
// copy next line of data to destination
memcpy(dest_ptr, source_ptr, ddsd.dwWidth);

// advance pointers
dest_ptr += (ddsd.dwWidth);
source_ptr += bitmap->bitmapinfoheader.biWidth;
} // end for index_y

// unlock the surface
lpdds->Unlock(NULL);

// return success
return(1);

} // end Scan_Image_Bitmap

///////////////////////////////////////////////////////////////

LPDIRECTDRAWSURFACE4 DDraw_Create_Surface(int width, int height, int mem_flags, int color_key = 1)
{
// this function creates an offscreen plain surface

DDSURFACEDESC2 ddsd; // working description
LPDIRECTDRAWSURFACE4 lpdds; // temporary surface

// set to access caps, width, and height
memset(&ddsd,0,sizeof(ddsd));
ddsd.dwSize = sizeof(ddsd);
ddsd.dwFlags = DDSD_CAPS| DDSD_WIDTH | DDSD_HEIGHT;

// set dimensions of the new bitmap surface
ddsd.dwWidth = 800; //width;
ddsd.dwHeight = 600; //height;

// set surface to offscreen plain
ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN | mem_flags;

// create the surface
if (FAILED(lpdd->CreateSurface(&ddsd,&lpdds,NULL)))
return(NULL);

// test if user wants a color key
if (color_key >= 0)
{
DDCOLORKEY color_key; // used to set color key
color_key.dwColorSpaceLowValue = _RGB16BIT565(0,0,0); //pure green
color_key.dwColorSpaceHighValue = _RGB16BIT565(0,0,0);

// now set the color key for source blitting
lpdds->SetColorKey(DDCKEY_SRCBLT, &color_key);
} // end if

// return surface
return(lpdds);
} // end DDraw_Create_Surface


///////////////////////////////////////////////////////////////

int Intro_Screen()
{
////Hide the Cursor
ShowCursor(FALSE);

///Black for a second
Sleep(1000);


// make sure this isn't executed again
if (window_closed)
return(0);

// for now test if user is hitting ESC and send WM_CLOSE
if (KEYDOWN(VK_ESCAPE))
{
PostMessage(main_window_handle,WM_CLOSE,0,0);
window_closed = 1;
} // end if

/////////Load COMPANY LOGO
Load_Bitmap_File(&bitmap,"BITMAP24.bmp");

for (int fade = 32; fade >= 0; fade--)
{
Sleep(5);

// lock the back buffer
DDRAW_INIT_STRUCT(ddsd);

lpddsback->Lock(NULL,&ddsd, DDLOCK_SURFACEMEMORYPTR | DDLOCK_WAIT,NULL);


// alias pointer to back buffer surface
USHORT *back_buffer = (USHORT *)ddsd.lpSurface;


// process each line and copy it into the secondary buffer
for (int index_y = 0; index_y < SCREEN_HEIGHT; index_y++)
{
for (int index_x = 0; index_x < SCREEN_WIDTH; index_x++)
{
// get BGR values, note the scaling down of the channels, so that they
// fit into the 5.6.5 format
USHORT blue = (bitmap.buffer[index_y*SCREEN_WIDTH*3 + index_x*3 + 0]) >> 3,
green = (bitmap.buffer[index_y*SCREEN_WIDTH*3 + index_x*3 + 1]) >> 3,
red = (bitmap.buffer[index_y*SCREEN_WIDTH*3 + index_x*3 + 2]) >> 3;
// this builds a 16 bit color value in 5.6.5 format (green dominant mode)

//fade in
if ((red - fade) > 0 )
red = red - fade;
else
red = 0;


if ((green - fade) > 0)
green = green - fade;
else
green = 0;

if ((blue - fade) > 0)
blue = blue - fade;
else
blue = 0;

//pixel
USHORT pixel = _RGB16BIT565(red, green, blue);

// write the pixel
back_buffer[index_x + (index_y*ddsd.lPitch >> 1)] = pixel;

} // end for index_x

} // end for index_y

// unlock the back buffer
if (FAILED(lpddsback->Unlock(NULL)))
return(0);

// perform the flip
while (FAILED(lpddsprimary->Flip(NULL, DDFLIP_WAIT)));

// hold title
if (fade == 0)
Sleep(3000);

} ///End of Fade FOR

//////////////////Fade OUT//////////////////////
for (fade = 0; fade <= 32; fade++)
{
Sleep(5);

// lock the back buffer
DDRAW_INIT_STRUCT(ddsd);

lpddsback->Lock(NULL,&ddsd, DDLOCK_SURFACEMEMORYPTR | DDLOCK_WAIT,NULL);


// alias pointer to back buffer surface
USHORT *back_buffer = (USHORT *)ddsd.lpSurface;


// process each line and copy it into the secondary buffer
for (int index_y = 0; index_y < SCREEN_HEIGHT; index_y++)
{
for (int index_x = 0; index_x < SCREEN_WIDTH; index_x++)
{
// get BGR values, note the scaling down of the channels, so that they
// fit into the 5.6.5 format
USHORT blue = (bitmap.buffer[index_y*SCREEN_WIDTH*3 + index_x*3 + 0]) >> 3,
green = (bitmap.buffer[index_y*SCREEN_WIDTH*3 + index_x*3 + 1]) >> 3,
red = (bitmap.buffer[index_y*SCREEN_WIDTH*3 + index_x*3 + 2]) >> 3;
// this builds a 16 bit color value in 5.6.5 format (green dominant mode)


if ((red - fade) > 0 )
red = red - fade;
else
red = 0;


if ((green - fade) > 0)
green = green - fade;
else
green = 0;

if ((blue - fade) > 0)
blue = blue - fade;
else
blue = 0;


USHORT pixel = _RGB16BIT565(red, green, blue);


// write the pixel
back_buffer[index_x + (index_y*ddsd.lPitch >> 1)] = pixel;

} // end for index_x

} // end for index_y

// unlock the back buffer
if (FAILED(lpddsback->Unlock(NULL)))
return(0);

// perform the flip
while (FAILED(lpddsprimary->Flip(NULL, DDFLIP_WAIT)));
} /////End of Fade out FOR


// unload the bitmap file, we no longer need it
Unload_Bitmap_File(&bitmap);
return(1);


} ////END of Intro

////////////////////////////////////////////////////////////////////////

int Load_Bitmap_File(BITMAP_FILE_PTR bitmap, char *filename)
{
// this function opens a bitmap file and loads the data into bitmap

int file_handle; // the file handle

UCHAR *temp_buffer = NULL; // used to convert 24 bit images to 16 bit
OFSTRUCT file_data; // the file data information

// open the file if it exists
if ((file_handle = OpenFile(filename,&file_data,OF_READ))==-1)
return(0);

// now load the bitmap file header
_lread(file_handle, &bitmap->bitmapfileheader,sizeof(BITMAPFILEHEADER));

// test if this is a bitmap file
if (bitmap->bitmapfileheader.bfType!=BITMAP_ID)
{
// close the file
_lclose(file_handle);

// return error
return(0);
} // end if

// now we know this is a bitmap, so read in all the sections

// first the bitmap infoheader

// now load the bitmap file header
_lread(file_handle, &bitmap->bitmapinfoheader,sizeof(BITMAPINFOHEADER));

// finally the image data itself
_lseek(file_handle,-(int)(bitmap->bitmapinfoheader.biSizeImage),SEEK_END);

// now read in the image, if the image is 8 or 16 bit then simply read it
// but if its 24 bit then read it into a temporary area and then convert
// it to a 16 bit image

if (bitmap->bitmapinfoheader.biBitCount==8 | | bitmap->bitmapinfoheader.biBitCount==16 | |
bitmap->bitmapinfoheader.biBitCount==24)
{
// delete the last image if there was one
if (bitmap->buffer)
free(bitmap->buffer);

// allocate the memory for the image
if (!(bitmap->buffer = (UCHAR *)malloc(bitmap->bitmapinfoheader.biSizeImage)))
{
// close the file
_lclose(file_handle);

// return error
return(0);
} // end if

// now read it in
_lread(file_handle,bitmap->buffer,bitmap->bitmapinfoheader.biSizeImage);

} // end if
else
{
// serious problem
return(0);

} // end else

#if 0
// write the file info out
printf("\nfilename:%s \nsize=%d \nwidth=%d \nheight=%d \nbitsperpixel=%d \ncolors=%d \nimpcolors=%d",
filename,
bitmap->bitmapinfoheader.biSizeImage,
bitmap->bitmapinfoheader.biWidth,
bitmap->bitmapinfoheader.biHeight,
bitmap->bitmapinfoheader.biBitCount,
bitmap->bitmapinfoheader.biClrUsed,
bitmap->bitmapinfoheader.biClrImportant);
#endif

// close the file
_lclose(file_handle);

// flip the bitmap
Flip_Bitmap(bitmap->buffer,
bitmap->bitmapinfoheader.biWidth*(bitmap->bitmapinfoheader.biBitCount/8),
bitmap->bitmapinfoheader.biHeight);

// return success
return(1);

} // end Load_Bitmap_File

///////////////////////////////////////////////////////////

int Unload_Bitmap_File(BITMAP_FILE_PTR bitmap)
{
// this function releases all memory associated with "bitmap"
if (bitmap->buffer)
{
// release memory
free(bitmap->buffer);

// reset pointer
bitmap->buffer = NULL;

} // end if

// return success
return(1);

} // end Unload_Bitmap_File

///////////////////////////////////////////////////////////

int Flip_Bitmap(UCHAR *image, int bytes_per_line, int height)
{
// this function is used to flip bottom-up .BMP images

UCHAR *buffer; // used to perform the image processing
int index; // looping index

// allocate the temporary buffer
if (!(buffer = (UCHAR *)malloc(bytes_per_line*height)))
return(0);

// copy image to work area
memcpy(buffer,image,bytes_per_line*height);

// flip vertically
for (index=0; index < height; index++)
memcpy(&image[((height-1) - index)*bytes_per_line],
&buffer[index*bytes_per_line], bytes_per_line);

// release the memory
free(buffer);

// return success
return(1);

} // end Flip_Bitmap

///////////////////////////////////////////////////////////////


LRESULT CALLBACK WindowProc(HWND hwnd,
UINT msg,
WPARAM wparam,
LPARAM lparam)
{
// this is the main message handler of the system
PAINTSTRUCT ps; // used in WM_PAINT
HDC hdc; // handle to a device context
char buffer[80]; // used to print strings

// what is the message
switch(msg)
{
case WM_CREATE:
{
// do initialization stuff here
// return success
return(0);
} break;

case WM_PAINT:
{
// simply validate the window
hdc = BeginPaint(hwnd,&ps);

// end painting
EndPaint(hwnd,&ps);

// return success
return(0);
} break;

case WM_DESTROY:
{

// kill the application, this sends a WM_QUIT message
PostQuitMessage(0);

// return success
return(0);
} break;

default:break;

} // end switch

// process any messages that we didn't take care of
return (DefWindowProc(hwnd, msg, wparam, lparam));

} // end WinProc

///////////////////////////////////////////////////////////

int Game_Main(void *parms = NULL, int num_parms = 0)
{

//lookup for wlking sequence
static int animation_seq[4] = {0,1,0,2};

int index; //general looper

// make sure this isn't executed again
if (window_closed)
return(0);

// for now test if user is hitting ESC and send WM_CLOSE
if (KEYDOWN(VK_ESCAPE))
{
PostMessage(main_window_handle,WM_CLOSE,0,0);
window_closed = 1;
} // end if


// copy background to the back buffer
DDraw_Draw_Surface(lpddsbackground,0,0, SCREEN_WIDTH,SCREEN_HEIGHT,lpddsback,0);


// move knight around

// draw all the bots
//for (index=0; index < 3; index++)
// {
// draw objects
// DDraw_Draw_Surface(knight[index].frames[animation_seq[knight[index].current_frame]],
// knight[index].x, knight[index].y,
// 72,80,
// lpddsback);

// } // end for index


// flip pages
while (FAILED(lpddsprimary->Flip(NULL, DDFLIP_WAIT)));

Sleep(100);

return(1);


} // end Game_Main

////////////////////////////////////////////////////////////

int Game_Init(void *parms = NULL, int num_parms = 0)
{
// this is called once after the initial window is created and
// before the main event loop is entered, do all your initialization
// here


LPDIRECTDRAW lpdd_temp;

// first create base IDirectDraw interface
if (FAILED(DirectDrawCreate(NULL, &lpdd_temp, NULL)))
return(0);

// now query for IDirectDraw4
if (FAILED(lpdd_temp->QueryInterface(IID_IDirectDraw4,
(LPVOID *)&lpdd)))
return(0);

// set cooperation to full screen
if (FAILED(lpdd->SetCooperativeLevel(main_window_handle,
DDSCL_FULLSCREEN | DDSCL_ALLOWMODEX |
DDSCL_EXCLUSIVE | DDSCL_ALLOWREBOOT)))
return(0);

// set display mode to 800x600x16
if (FAILED(lpdd->SetDisplayMode(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_BPP,0,0)))
return(0);

// clear ddsd and set size
DDRAW_INIT_STRUCT(ddsd);

// enable valid fields
ddsd.dwFlags = DDSD_CAPS | DDSD_BACKBUFFERCOUNT;

// set the backbuffer count field to 1, use 2 for triple buffering
ddsd.dwBackBufferCount = 1;

// request a complex, flippable
ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE | DDSCAPS_COMPLEX | DDSCAPS_FLIP;

// create the primary surface
if (FAILED(lpdd->CreateSurface(&ddsd, &lpddsprimary, NULL)))
return(0);


// this line is needed by the call
ddsd.ddsCaps.dwCaps = DDSCAPS_BACKBUFFER;


// get the attached back buffer surface
if (FAILED(lpddsprimary->GetAttachedSurface(&ddsd.ddsCaps, &lpddsback)))
return(0);



// load the 16-bit image
if (!Load_Bitmap_File(&bitmap,"haha.bmp"))
return(0);

// clean the surfaces
DDraw_Fill_Surface(lpddsprimary,0);
DDraw_Fill_Surface(lpddsback,0);

// create the buffer to hold the background
lpddsbackground = DDraw_Create_Surface(800,600,0,-1);


// lock the surface
lpddsbackground->Lock(NULL,&ddsd, DDLOCK_SURFACEMEMORYPTR | DDLOCK_WAIT,NULL);

// get video pointer to primary surfce
UCHAR *image_buffer = (UCHAR *)ddsd.lpSurface;


// test if memory is linear
if (ddsd.lPitch == SCREEN_WIDTH)
{
// copy memory from double buffer to primary buffer
memcpy((void *)image_buffer, (void *)bitmap.buffer, SCREEN_WIDTH*SCREEN_HEIGHT);


} // end if
else
{ // non-linear

// make copy of source and destination addresses
UCHAR *dest_ptr = image_buffer;
UCHAR *src_ptr = bitmap.buffer;

// memory is non-linear, copy line by line
for (int y=0; y < SCREEN_HEIGHT; y++)
{
// copy line
memcpy((void *)dest_ptr, (void *)src_ptr, SCREEN_WIDTH);

// advance pointers to next line
dest_ptr+=ddsd.lPitch;
src_ptr +=SCREEN_WIDTH;
} // end for

} // end else


// copy memory from double buffer to primary buffer
memcpy((void *)image_buffer, (void *)bitmap.buffer, SCREEN_WIDTH*SCREEN_HEIGHT);


// now unlock the background surface
if (FAILED(lpddsbackground->Unlock(NULL)))
return(0);

Sleep(500);

// unload the bitmap file, we no longer need it
Unload_Bitmap_File(&bitmap);


//knight[0].x = 100;
//knight[0].y = 200;
//knight[0].current_frame = 0;
//knight[0].counter = 0;


// load the 8-bit image
//if (!Load_Bitmap_File(&bitmap,"knight.bmp"))
// return(0);

// create each surface and load bits
//for (int index = 0; index < 3; index++)
// {
// create surface to hold image
// knight[0].frames[index] = DDraw_Create_Surface(72,80,0);

// now load bits...
// Scan_Image_Bitmap(&bitmap, // bitmap file to scan image data from
// knight[0].frames[index], // surface to hold data
// index, 0); // cell to scan image from
// } //end for
// return success or failure or your own return code here

// unload the bitmap file, we no longer need it
//Unload_Bitmap_File(&bitmap);
return(1);

} // end Game_Init

/////////////////////////////////////////////////////////////

int Game_Shutdown(void *parms = NULL, int num_parms = 0)
{
// this is called after the game is exited and the main event
// loop while is exited, do all you cleanup and shutdown here


// now the back buffer surface
if (lpddsback)
{
lpddsback->Release();
lpddsback = NULL;
} // end if

// now the primary surface
if (lpddsprimary)
{
lpddsprimary->Release();
lpddsprimary = NULL;
} // end if

// now blow away the IDirectDraw4 interface
if (lpdd)
{
lpdd->Release();
lpdd = NULL;
} // end if

// return success or failure or your own return code here
return(1);

} // end Game_Shutdown

// WINMAIN ////////////////////////////////////////////////

int WINAPI WinMain( HINSTANCE hinstance,
HINSTANCE hprevinstance,
LPSTR lpcmdline,
int ncmdshow)
{

WNDCLASSEX winclass; // this will hold the class we create
HWND hwnd; // generic window handle
MSG msg; // generic message
HDC hdc; // graphics device context

// first fill in the window class stucture
winclass.cbSize = sizeof(WNDCLASSEX);
winclass.style = CS_DBLCLKS | CS_OWNDC |
CS_HREDRAW | CS_VREDRAW;
winclass.lpfnWndProc = WindowProc;
winclass.cbClsExtra = 0;
winclass.cbWndExtra = 0;
winclass.hInstance = hinstance;
winclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
winclass.hCursor = LoadCursor(NULL, IDC_ARROW);
winclass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
winclass.lpszMenuName = NULL;
winclass.lpszClassName = WINDOW_CLASS_NAME;
winclass.hIconSm = LoadIcon(NULL, IDI_APPLICATION);

// save hinstance in global
hinstance_app = hinstance;

// register the window class
if (!RegisterClassEx(&winclass))
return(0);

// create the window
if (!(hwnd = CreateWindowEx(NULL, // extended style
WINDOW_CLASS_NAME, // class
"DirectDraw Page Flipping Demo", // title
WS_POPUP | WS_VISIBLE,
0,0, // initial x,y
SCREEN_WIDTH,SCREEN_HEIGHT, // initial width, height
NULL, // handle to parent
NULL, // handle to menu
hinstance,// instance of this application
NULL))) // extra creation parms
return(0);

// save main window handle
main_window_handle = hwnd;

// initialize game here
Game_Init();
Sleep(100);
Intro_Screen();

// enter main event loop
while(TRUE)
{

// test if there is a message in queue, if so get it
if (PeekMessage(&msg,NULL,0,0,PM_REMOVE))
{
// test if this is a quit
if (msg.message == WM_QUIT)
break;

// translate any accelerator keys
TranslateMessage(&msg);

// send the message to the window proc
DispatchMessage(&msg);
} // end if

// main game processing goes here
Game_Main();

} // end while

// closedown game here
Game_Shutdown();

// return to Windows like this
return(msg.wParam);

} // end WinMain

///////////////////////////////////////////////////////////

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