#include <windows.h>
#include <scrnsave.h>
#include <string.h>
#include <io.h>
BOOL LocateTheBmp(char *);
BOOL LoadTheBmp(char *);
BITMAPINFOHEADER *pMem, *pBit;
LPSTR lpBit, lpMemTmp;
HPALETTE hPalette;
struct _finddata_t ff;
HANDLE hFile;
HGLOBAL hGMem, hGMemMain;
HLOCAL hLMem, hLMem1, hLMemMain;
HDC hDC;
PSTR pTmp, pPalette;
LRESULT WINAPI ScreenSaverProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static RECT re;
static UINT uTimer;
char lpstrBitName[400];
char lpstrDirName[]="C:\\Screen\\";
char BitWildCard[]="*.BMP";
switch(message)
{
case WM_CREATE:
uTimer=SetTimer(hwnd, 1, 7000, NULL);
break;
case WM_ERASEBKGND:
hDC=GetDC(hwnd);
GetClientRect(hwnd, &re);
FillRect(hDC, &re, GetStockObject(BLACK_BRUSH));
ReleaseDC(hwnd, hDC);
break;
case WM_TIMER:
strcpy(lpstrBitName, lpstrDirName);
strcat(lpstrBitName, BitWildCard);
if(!LocateTheBmp(&lpstrBitName))
break;
strcpy(lpstrBitName, lpstrDirName);
strcat(lpstrBitName, ff.name);
if(!LoadTheBmp(&lpstrBitName))
break;
hDC=GetDC(hwnd);
lpBit = GlobalLock(hGMem);
pBit = LocalLock(hLMem1);
GetClientRect(hwnd, &re);
SelectPalette(hDC, hPalette, FALSE);
RealizePalette(hDC);
SetDIBitsToDevice(hDC, 0, 0, pBit->biWidth, pBit->biHeight,
0, 0, 0, pBit->biHeight, lpBit, pBit, DIB_RGB_COLORS);
GetClientRect(hwnd, &re);
ReleaseDC(hwnd, hDC);
GlobalFree(hGMem);
LocalFree(hLMem);
DeleteObject(hPalette);
break;
case WM_DESTROY:
if(uTimer)
KillTimer(hwnd, uTimer);
break;
default:
return (DefScreenSaverProc(hwnd, message, wParam, lParam));
}
return 0;
}
BOOL WINAPI ScreenSaverConfigureDialog(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
return TRUE;
}
BOOL WINAPI RegisterDialogClasses(HANDLE hInst)
{
return TRUE;
}
BOOL LoadTheBmp(char *lpstrBitName)
{
LPSTR lpTmp;
HANDLE hFile;
WORD i, T;
char bTemp, bTemp1;
OFSTRUCT of;
DWORD TmpDVal, dwRead;
BITMAPFILEHEADER bHdr;
hFile = OpenFile(lpstrBitName, &of, OF_READ);
ReadFile(hFile, &bHdr, sizeof(BITMAPFILEHEADER), &dwRead, NULL);
if(bHdr.bfType != 'MB'){
CloseHandle(hFile);
return FALSE;
}
//Now Allocate for the colors & info header with space for 0 to bfOffBits-1 bytes
if (!(hLMem = LocalAlloc(LMEM_MOVEABLE, bHdr.bfOffBits-sizeof(BITMAPFILEHEADER)))){
CloseHandle(hFile);
return FALSE;
}
if (!(hLMem1 = LocalAlloc(LMEM_MOVEABLE, bHdr.bfOffBits-sizeof(BITMAPFILEHEADER)))){
LocalFree(hLMem);
CloseHandle(hFile);
return FALSE;
}
pMem = LocalLock(hLMem);
ReadFile(hFile, pMem, sizeof(BITMAPINFOHEADER), &dwRead, NULL);
//Allocate for the data bits
if (!(hGMem = GlobalAlloc(GMEM_MOVEABLE, pMem->biSizeImage+1))){
LocalFree(hLMem);
LocalFree(hLMem1);
CloseHandle(hFile);
return FALSE;
}
pBit = LocalLock(hLMem1);
lpBit = GlobalLock(hGMem);
hLMemMain = hLMem1;
hGMemMain = hGMem;
if(pMem->biSize != sizeof(BITMAPINFOHEADER)){
LocalFree(hLMem);
LocalFree(hLMem1);
GlobalFree(hGMem);
CloseHandle(hFile);
return FALSE;
}
//Read num colors * 4 bytes into memory
T = (1 << ((pMem->biBitCount) != 24 ? pMem->biBitCount:16));
if(pMem->biClrUsed)
T = pMem->biClrUsed;
if((pMem->biBitCount) != 24){
ReadFile(hFile, (char near *)pMem+sizeof(BITMAPINFOHEADER), T*4, &dwRead, NULL);
}
memcpy(pBit, pMem, bHdr.bfOffBits-sizeof(BITMAPFILEHEADER));
lpTmp = lpBit;
// _hread(hFile, lpBit, pMem->biSizeImage+1);
ReadFile(hFile, lpBit, pMem->biSizeImage+1, &dwRead, NULL);
CloseHandle(hFile);
// Now init the palette for palette creation
pTmp = (char near *)pMem+sizeof(BITMAPINFOHEADER);
pPalette = pTmp - 4;
hPalette=0;
if(T){ //T is number of palette colors, 0 for 24-bit
for(i=0 ; i < T ; i++){
bTemp = *pTmp;
bTemp1 = *(pTmp+2);
*pTmp = bTemp1;
*(pTmp+2) = bTemp;
*(pTmp+3) = 0;
pTmp += 4;
}
__asm MOV EBX, pPalette
__asm MOV Word Ptr [EBX], 300h
__asm MOV AX, T
__asm MOV Word Ptr [EBX][2], AX
hPalette = CreatePalette((LOGPALETTE *)pPalette);
}
LocalFree(hLMem);
GlobalUnlock(hGMem);
LocalUnlock(hLMem1);
return TRUE;
}
BOOL LocateTheBmp(char *lpstrBitName)
{
static long hBitFind;
static BOOL foundfirst;
if(!foundfirst){
if((hBitFind=_findfirst(lpstrBitName, &ff))==-1){
// _findclose(hBitFind);
// if((hBitFind=_findfirst(lpstrBitName, &ff))==-1)
return FALSE;
}
else
foundfirst=TRUE;
}
else{
if((_findnext(hBitFind, &ff))==-1){
_findclose(hBitFind);
if((hBitFind=_findfirst(lpstrBitName, &ff))==-1)
return FALSE;
}
}
return TRUE;
}
