splash.c

来自「有关zip的一个开发实例。主要包括图片和程序源代码。」· C语言 代码 · 共 146 行

#include <windows.h>
#include "wiz.h"
#ifdef WIN32
HWND hSplashScreen;

HBITMAP LoadResourceBitmap(HINSTANCE hInstance, LPSTR lpString,
                           HPALETTE FAR* lphPalette);
HPALETTE CreateDIBPalette (LPBITMAPINFO lpbmi, LPINT lpiNumColors);

HPALETTE CreateDIBPalette (LPBITMAPINFO lpbmi, LPINT lpiNumColors)
{
   LPBITMAPINFOHEADER  lpbi;
   LPLOGPALETTE     lpPal;
   HANDLE           hLogPal;
   HPALETTE         hPal = NULL;
   int              i;

   lpbi = (LPBITMAPINFOHEADER)lpbmi;
   if (lpbi->biBitCount <= 8)
       *lpiNumColors = (1 << lpbi->biBitCount);
   else
       *lpiNumColors = 0;  // No palette needed for 24 BPP DIB

   if (*lpiNumColors)
      {
      hLogPal = GlobalAlloc (GHND, sizeof (LOGPALETTE) +
                             sizeof (PALETTEENTRY) * (*lpiNumColors));
      lpPal = (LPLOGPALETTE) GlobalLock (hLogPal);
      lpPal->palVersion    = 0x300;
      lpPal->palNumEntries = (WORD)*lpiNumColors;

      for (i = 0;  i < *lpiNumColors;  i++)
         {
         lpPal->palPalEntry[i].peRed   = lpbmi->bmiColors[i].rgbRed;
         lpPal->palPalEntry[i].peGreen = lpbmi->bmiColors[i].rgbGreen;
         lpPal->palPalEntry[i].peBlue  = lpbmi->bmiColors[i].rgbBlue;
         lpPal->palPalEntry[i].peFlags = 0;
         }
      hPal = CreatePalette (lpPal);
      GlobalUnlock (hLogPal);
      GlobalFree   (hLogPal);
   }
   return hPal;
}

HBITMAP LoadResourceBitmap(HINSTANCE hInstance, LPSTR lpString,
                           HPALETTE FAR* lphPalette)
{
    HRSRC  hRsrc;
    HGLOBAL hGlobal, hTemp;
    DWORD dwSize;
    HBITMAP hBitmapFinal = NULL;
    LPBITMAPINFOHEADER  lpbi;
    LPSTR lpRes, lpNew;
    HDC hdc;
    int iNumColors;

    if ((hRsrc = FindResource(hInstance, lpString, RT_BITMAP)) != NULL)
    {
       hTemp = LoadResource(hInstance, hRsrc);
       dwSize = SizeofResource(hInstance, hRsrc);
       lpRes = LockResource(hTemp);

       hGlobal = GlobalAlloc(GHND, dwSize);
       lpNew = GlobalLock(hGlobal);
       memcpy(lpNew, lpRes, dwSize);
       FreeResource(hTemp);

       lpbi = (LPBITMAPINFOHEADER)lpNew;

       hdc = GetDC(NULL);
       *lphPalette =  CreateDIBPalette ((LPBITMAPINFO)lpbi, &iNumColors);
       if (*lphPalette)
       {
          SelectPalette(hdc,*lphPalette,FALSE);
          RealizePalette(hdc);
       }

       hBitmapFinal = CreateDIBitmap(hdc,
                 (LPBITMAPINFOHEADER)lpbi,
                 (LONG)CBM_INIT,
                 (LPSTR)lpbi + lpbi->biSize + iNumColors * sizeof(RGBQUAD),
                 (LPBITMAPINFO)lpbi,
                 DIB_RGB_COLORS );

       ReleaseDC(NULL,hdc);
       GlobalUnlock(hGlobal);
       GlobalFree(hGlobal);
    }
    return (hBitmapFinal);
}

void ShowSplashScreen(void)
{
HWND hWndDesktop;
RECT rc;
HBITMAP hBitmap,hOldBitmap;
HPALETTE hPalette;
HDC hMemDC, hdc;
BITMAP bm;

hBitmap = LoadResourceBitmap(hInst,"splash", &hPalette);
GetObject(hBitmap, sizeof(BITMAP), (LPSTR)&bm);

hWndDesktop = GetDesktopWindow();
GetClientRect(hWndDesktop, &rc);

rc.left = (rc.right-bm.bmWidth)/2;
rc.top  = (rc.bottom-bm.bmHeight)/2;

hSplashScreen = CreateWindow("STATIC", NULL,
        WS_CHILD|WS_VISIBLE | WS_DLGFRAME |
        WS_EX_TOPMOST,
        rc.left,
        rc.top,
        bm.bmWidth+(2*GetSystemMetrics(SM_CXFIXEDFRAME)),
        bm.bmHeight+(2*GetSystemMetrics(SM_CYFIXEDFRAME)),
        hWndDesktop,
        NULL, /* Use class menu */
        (HANDLE)GetWindowLong (hWndDesktop, GWL_HINSTANCE),
        NULL);

SetWindowPos(hSplashScreen,
             HWND_TOP,
             rc.left,
             rc.top,
             bm.bmWidth+(2*GetSystemMetrics(SM_CXFIXEDFRAME)),
             bm.bmHeight+(2*GetSystemMetrics(SM_CYFIXEDFRAME)),
             SWP_SHOWWINDOW);

hdc = GetDC(hSplashScreen);
hMemDC = CreateCompatibleDC(hdc);
SelectPalette(hdc,hPalette,FALSE);
RealizePalette(hdc);
SelectPalette(hMemDC,hPalette,FALSE);
RealizePalette(hMemDC);
hOldBitmap = SelectObject(hMemDC,hBitmap);
BitBlt(hdc,0,0,bm.bmWidth,bm.bmHeight,hMemDC,0,0,SRCCOPY);
DeleteObject(SelectObject(hMemDC,hOldBitmap));
DeleteDC(hMemDC);
ReleaseDC(hSplashScreen,hdc);
DeleteObject(hPalette);
UpdateWindow(hWndDesktop);
}
#endif /* ?WIN32 */