bitmap.c

来自「一个类似windows」· C语言 代码 · 共 87 行

#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);
}