loadpic.cpp

这是一本学习 window编程的很好的参考教材

// Load picture module - By Goofy [FreeStylers]
// version 1.1a (2002/07/14)
#include "stdafx.h"
#include <windows.h>

#include <olectl.h>
#include <comdef.h>
#include <stdio.h>
#include "loadpic.h"
struct Pictures
{
  IPicture *Picture; // pointer to the picture
  long PictureWidth; // picture witdh (in pixels)
  long PictureHeight; // picture height (in pixels)
  int PositionX; // the X coordinate of the picture on the Window
  int PositionY; // the Y coordinate of the picture on the Window
  //HWND hWnd; // the handle of the window where the picture is printed on
  OLE_XSIZE_HIMETRIC cx; // Amount which will be used for copy horizontally in source picture
  OLE_YSIZE_HIMETRIC cy; // Amount which will be used for copy vertically in source picture

}*pFirstPicture;



IPicture *LoadPicture( const unsigned char *data, size_t len,/*long *ret_w, long *ret_h,*/ OLE_XSIZE_HIMETRIC *cx, OLE_YSIZE_HIMETRIC *cy)
{

  IPicture *pic = NULL;
  HGLOBAL hGlobal = GlobalAlloc(GMEM_MOVEABLE, len);
  LPVOID pvData = GlobalLock( hGlobal );
  memcpy(pvData,data,len);
  GlobalUnlock(hGlobal);
  LPSTREAM pStream = NULL;
  CreateStreamOnHGlobal( hGlobal, TRUE, &pStream );
  OleLoadPicture(pStream, 0, FALSE,IID_IPicture, (void **)&pic);
  pStream->Release();
  pic->get_Width(cx);
  pic->get_Height(cy);
  //dcPictureLoad = GetDC(hWnd);
  //*ret_w = MAP_LOGHIM_TO_PIX(*cx, GetDeviceCaps(dcPictureLoad, LOGPIXELSX));
  //*ret_h = MAP_LOGHIM_TO_PIX(*cy, GetDeviceCaps(dcPictureLoad, LOGPIXELSX));
  //ReleaseDC(hWnd,dcPictureLoad);
  return pic;
}


void RepaintPictures(HWND hWnd, HDC dcRepaintPictures)
{

      RECT bounds;
      bounds.top = pFirstPicture->PositionY;
	
	  pFirstPicture->PictureWidth = MAP_LOGHIM_TO_PIX(pFirstPicture->cx, GetDeviceCaps(dcRepaintPictures, LOGPIXELSX));
	  pFirstPicture->PictureHeight= MAP_LOGHIM_TO_PIX(pFirstPicture->cy, GetDeviceCaps(dcRepaintPictures, LOGPIXELSX));
	 
      bounds.bottom = pFirstPicture->PositionY + pFirstPicture->PictureHeight;
      bounds.left = pFirstPicture->PositionX;
      bounds.right = pFirstPicture->PositionX + pFirstPicture->PictureWidth;
      pFirstPicture->Picture->Render(dcRepaintPictures, bounds.left, bounds.bottom, bounds.right - bounds.left,
                                bounds.top - bounds.bottom, 0, 0, pFirstPicture->cx, pFirstPicture->cy, NULL);
   
    
}

void AddPicture(int ResourceHandle,int PositionX,int PositionY)
{
  HRSRC res = FindResource(GetModuleHandle(NULL),MAKEINTRESOURCE(ResourceHandle),"BINARY");
  if (res) 
  {
    struct Pictures *pPicture = (struct Pictures*) malloc (sizeof(struct Pictures));
    HGLOBAL mem = LoadResource(GetModuleHandle(NULL), res);
    void *data = LockResource(mem);
    size_t sz = SizeofResource(GetModuleHandle(NULL), res);
    pPicture->Picture = LoadPicture(/*hWnd,*/ (u_char*)data, sz, /*&pPicture->PictureWitdh, 
	                                	&pPicture->PictureHeight,*/ &pPicture->cx, &pPicture->cy);
    if (pPicture->Picture != NULL)
    {
      pPicture->PositionX=PositionX;
      pPicture->PositionY=PositionY;
 
     
      pFirstPicture=pPicture;
   
     
    }
  }
}
void AddPicture(/*HWND hWnd,*/TCHAR* szFileName,int PositionX,int PositionY)
{

		TCHAR FileName[MAX_PATH];
		if (_tcsrchr(szFileName,':')) {
			_tcscpy(FileName,szFileName);
		}
		else{
			GetModuleFileName(NULL,FileName,sizeof FileName);
			TCHAR* szTemp=_tcsrchr(FileName,'\\');
			*(szTemp+1)=0;
			_tcscat(FileName,szFileName);
		}	
		HANDLE hFile=CreateFile(FileName,
			GENERIC_WRITE|GENERIC_READ,
			FILE_SHARE_WRITE|FILE_SHARE_READ,
			NULL,
			OPEN_EXISTING,
			FILE_ATTRIBUTE_NORMAL,
			NULL);
		if(hFile==INVALID_HANDLE_VALUE)return ;
		DWORD dwHigh;
		DWORD dwSize=GetFileSize(hFile,&dwHigh);
		if(dwSize==0){
			CloseHandle(hFile);
			return ;
		}
		DWORD dwlen;
		BYTE * data=new BYTE[dwSize];
		ReadFile(hFile,data,dwSize,&dwlen,NULL);
		CloseHandle(hFile);
		


    struct Pictures *pPicture = (struct Pictures*) malloc (sizeof(struct Pictures));
  
   
    pPicture->Picture = LoadPicture(/*hWnd,*/ (u_char*)data, dwlen,/* &pPicture->PictureWitdh, 
	                                	&pPicture->PictureHeight,*/ &pPicture->cx, &pPicture->cy);
	delete[] data;
    if (pPicture->Picture != NULL)
    {
      pPicture->PositionX=PositionX;
      pPicture->PositionY=PositionY;
      //pPicture->hWnd=hWnd;
    
      pFirstPicture=pPicture;
    
   
    }
  }
void RemovePictures()
{
			IPicture *freepic = pFirstPicture->Picture;
			freepic->Release();
			free(pFirstPicture);
}