bitmap.c

这是一个开放源代码的与WINNT/WIN2K/WIN2003兼容的操作系统

#include "precomp.h"

/*
 * @implemented
 */
HBITMAP STDCALL
CreateDIBSection(
   HDC hDC,
   CONST BITMAPINFO *BitmapInfo,
   UINT Usage,
   VOID **Bits,
   HANDLE hSection,
   DWORD dwOffset)
{
   PBITMAPINFO pConvertedInfo;
   UINT ConvertedInfoSize;
   HBITMAP hBitmap = NULL;

   pConvertedInfo = ConvertBitmapInfo(BitmapInfo, Usage,
                                      &ConvertedInfoSize, FALSE);
   if (pConvertedInfo)
   {
      hBitmap = NtGdiCreateDIBSection(hDC, hSection, dwOffset, pConvertedInfo, Usage, 0, 0, 0, Bits);
      if (BitmapInfo != pConvertedInfo)
         RtlFreeHeap(RtlGetProcessHeap(), 0, pConvertedInfo);
   }

   return hBitmap;
}

/*
 * @implemented
 */
BOOL
STDCALL
BitBlt(HDC hdcDest,      /* handle to destination DC */
       int nXOriginDest, /* x-coord of destination upper-left corner */
       int nYOriginDest, /* y-coord of destination upper-left corner */
       int nWidthDest,   /* width of destination rectangle */
       int nHeightDest,  /* height of destination rectangle */
       HDC hdcSrc,       /* handle to source DC */
       int nXSrc,        /* x-coordinate of source upper-left corner */
       int nYSrc,        /* y-coordinate of source upper-left corner */
       DWORD dwRop)      /* raster operation code */
{
    return NtGdiBitBlt(hdcDest,
                       nXOriginDest,
                       nYOriginDest,
                       nWidthDest,
                       nHeightDest,
                       hdcSrc,
                       nXSrc,
                       nYSrc,
                       dwRop,
                       0,
                       0);
}

/*
 * @implemented
 */
BOOL STDCALL
StretchBlt(
   HDC hdcDest,      /* handle to destination DC */
   int nXOriginDest, /* x-coord of destination upper-left corner */
   int nYOriginDest, /* y-coord of destination upper-left corner */
   int nWidthDest,   /* width of destination rectangle */
   int nHeightDest,  /* height of destination rectangle */
   HDC hdcSrc,       /* handle to source DC */
   int nXOriginSrc,  /* x-coord of source upper-left corner */
   int nYOriginSrc,  /* y-coord of source upper-left corner */
   int nWidthSrc,    /* width of source rectangle */
   int nHeightSrc,   /* height of source rectangle */
   DWORD dwRop)      /* raster operation code */
	
{
   if ((nWidthDest != nWidthSrc) || (nHeightDest != nHeightSrc))
   {
      return NtGdiStretchBlt(hdcDest, nXOriginDest, nYOriginDest, nWidthDest,
                             nHeightDest, hdcSrc, nXOriginSrc, nYOriginSrc,
                             nWidthSrc, nHeightSrc, dwRop, 0);
   }
  
   return NtGdiBitBlt(hdcDest, nXOriginDest, nYOriginDest, nWidthDest,
                      nHeightDest, hdcSrc, nXOriginSrc, nYOriginSrc, dwRop, 0, 0);
}

/*
 * @implemented
 */
HBITMAP WINAPI
CreateBitmapIndirect(const BITMAP *pbm)
{
   if (pbm)
   {
      return NtGdiCreateBitmap(pbm->bmWidth,
                               pbm->bmHeight,
                               pbm->bmPlanes,
                               pbm->bmBitsPixel,
                               pbm->bmBits);
   }
   return NULL;
}

HBITMAP WINAPI
CreateDiscardableBitmap(
   HDC  hDC,
   INT  Width,
   INT  Height)
{
   return  NtGdiCreateCompatibleBitmap(hDC, Width, Height);
}


INT WINAPI
SetDIBitsToDevice(
    HDC hDC,
    int XDest,
    int YDest,
    DWORD Width,
    DWORD Height,
    int XSrc,
    int YSrc,
    UINT StartScan,
    UINT ScanLines,
    CONST VOID *Bits,
    CONST BITMAPINFO *lpbmi,
    UINT ColorUse)
{
    return NtGdiSetDIBitsToDeviceInternal(hDC,
                                          XDest,
                                          YDest,
                                          Width,
                                          Height,
                                          XSrc,
                                          YSrc,
                                          StartScan,
                                          ScanLines,
                                          (LPBYTE)Bits,
                                          (LPBITMAPINFO)lpbmi,
                                          ColorUse,
                                          lpbmi->bmiHeader.biSizeImage,
                                          lpbmi->bmiHeader.biSize,
                                          FALSE,
                                          NULL);
}