emf10.c

Windows Programming source code

/*---------------------------------------
   EMF10.C -- Enhanced Metafile Demo #10
              (c) Charles Petzold, 1998
  ---------------------------------------*/

#include <windows.h>

TCHAR szClass [] = TEXT ("EMF10") ;
TCHAR szTitle [] = TEXT ("EMF10: Enhanced Metafile Demo #10") ;

void CreateRoutine (HWND hwnd)
{
}

void PaintRoutine (HWND hwnd, HDC hdc, int cxArea, int cyArea)
{
     ENHMETAHEADER emh ;
     float         fScale ;
     HENHMETAFILE  hemf ;
     int           cxMms, cyMms, cxPix, cyPix, cxImage, cyImage ;
     RECT          rect ;

     cxMms = GetDeviceCaps (hdc, HORZSIZE) ;
     cyMms = GetDeviceCaps (hdc, VERTSIZE) ;
     cxPix = GetDeviceCaps (hdc, HORZRES) ;
     cyPix = GetDeviceCaps (hdc, VERTRES) ;

     hemf = GetEnhMetaFile (TEXT ("..\\emf8\\emf8.emf")) ;

     GetEnhMetaFileHeader (hemf, sizeof (emh), &emh) ;

     cxImage = emh.rclFrame.right - emh.rclFrame.left ;
     cyImage = emh.rclFrame.bottom - emh.rclFrame.top ;

     cxImage = cxImage * cxPix / cxMms / 100 ;
     cyImage = cyImage * cyPix / cyMms / 100 ;

     fScale = min ((float) cxArea / cxImage, (float) cyArea / cyImage) ;

     cxImage = (int) (fScale * cxImage) ;
     cyImage = (int) (fScale * cyImage) ;

     rect.left   = (cxArea - cxImage) / 2 ;
     rect.right  = (cxArea + cxImage) / 2 ;
     rect.top    = (cyArea - cyImage) / 2 ;
     rect.bottom = (cyArea + cyImage) / 2 ;

     PlayEnhMetaFile (hdc, hemf, &rect) ;

     DeleteEnhMetaFile (hemf) ;
}