IImageEx

#pragma once/******************************************************************** file name :  g:/工具源码/WinCE/CE600WinCode/COMImage.h author  : Clark created  : 27:1:2011   16:09 purpose  : 实现IImage操作*********************************************************************/#include <Imaging.h>

class IImageEx{public: static BOOL Init(); static void UnInit(); static HBITMAP LoadImageFromFile(TCHAR * pFileImage);

public: explicit IImageEx(); ~IImageEx(); BOOL LoadBuf(HINSTANCE hResource, UINT ResID, TCHAR* lpType); void loadFile(LPCWSTR lpResourceName); void drawImage(HDC* pDC, RECT rtDest, RECT rtSrc);

 static IImagingFactory  *g_pIImgFactory; IImage* m_pIImage;};

 

 

 

 

#include "stdafx.h"#include <INITGUID.h> #include "COMImage.h"#include <AFX.h> #include <string.h>

#pragma comment (lib,"Ole32.lib")

 

IImagingFactory* IImageEx::g_pIImgFactory = NULL;

BOOL IImageEx::Init(){ CoInitializeEx(NULL,COINIT_MULTITHREADED); HRESULT hResult = CoCreateInstance(CLSID_ImagingFactory,NULL,  CLSCTX_INPROC_SERVER,  IID_IImagingFactory,  (void **)&g_pIImgFactory); return (hResult == S_OK);}

void IImageEx::UnInit(){ if(g_pIImgFactory) {  g_pIImgFactory->Release();  g_pIImgFactory = NULL; } CoUninitialize();}

IImageEx::IImageEx():m_pIImage(NULL){}IImageEx::~IImageEx(){ if( NULL != m_pIImage) {  m_pIImage->Release();  delete m_pIImage; } m_pIImage = NULL;}

HBITMAP IImageEx::LoadImageFromFile(TCHAR * pFileImage){ HBITMAP hResult = 0; IImage *pImageBmp = NULL;  ImageInfo imageInfo; HRESULT hr = g_pIImgFactory->CreateImageFromFile(pFileImage, &pImageBmp); if (SUCCEEDED(hr)&& SUCCEEDED(pImageBmp->GetImageInfo(&imageInfo))) {  CWindowDC dc(0);  CDC dcBitmap;  dcBitmap.CreateCompatibleDC(&dc);  hResult = CreateCompatibleBitmap(dc.GetSafeHdc(),imageInfo.Width, imageInfo.Height);  HGDIOBJ hOldBitmap = SelectObject(dcBitmap, hResult);  //note:内存不足的话，Draw操作可能会失败  pImageBmp->Draw(dcBitmap, CRect(0, 0, imageInfo.Width, imageInfo.Height), NULL);   SelectObject(dcBitmap, hOldBitmap);  DeleteDC(dcBitmap);  pImageBmp->Release(); } return hResult;}

void IImageEx::loadFile(LPCWSTR lpResourceName){ HRSRC hrRes; HRESULT hr; HGLOBAL hGlobal; LPSTR lpRes; DWORD dwSize; HMODULE hModule_Current; hModule_Current = GetModuleHandle (NULL); //获得文件句柄 hrRes = FindResource (hModule_Current, lpResourceName, RT_RCDATA); //查找资源 dwSize = SizeofResource (GetModuleHandle (NULL), hrRes); //获得资源文件大小 hGlobal = LoadResource (GetModuleHandle (NULL), hrRes); //加载文件  lpRes = (LPSTR)LockResource (hGlobal); //锁定资源文件 if (!SUCCEEDED (hr=g_pIImgFactory->CreateImageFromFile (lpResourceName, &m_pIImage))) //从文件中创建对象 {  TRACE(_T("Failed to COM_IMAGE!"));  AfxMessageBox(lpResourceName);  DeleteObject(hrRes);  exit(0); } DeleteObject(hrRes);}

BOOL IImageEx::LoadBuf(HINSTANCE hResource, UINT ResID, TCHAR* lpType){ if(NULL == g_pIImgFactory)  return FALSE;

 if(!hResource)  return FALSE; HRSRC  hRes = FindResource(hResource , MAKEINTRESOURCE(ResID) , lpType); if(!hRes) {  return FALSE; } HGLOBAL  hGlobal = LoadResource(hResource , hRes); if(!hGlobal) {  return FALSE; } LPVOID  pData = LockResource( hGlobal ); DWORD  dwSize = SizeofResource(hResource , hRes); g_pIImgFactory->CreateImageFromBuffer(pData , dwSize ,  BufferDisposalFlagNone , &m_pIImage); FreeResource(hGlobal); pData = NULL; return true;}

void IImageEx::drawImage(HDC* pDC, RECT rtDest, RECT rtSrc){ ImageInfo imfo; m_pIImage->GetImageInfo(&imfo); double dDotPermmX = imfo.Xdpi / 25.4; double dDotPermmY = imfo.Ydpi / 25.4; //pSrcRect指向以像素点为单位的区域 RECT rcSrc =  {  (LONG)(rtSrc.left / dDotPermmX / 0.01),  (LONG)(rtSrc.top / dDotPermmY / 0.01),  (LONG)(rtSrc.right / dDotPermmX / 0.01),  (LONG)(rtSrc.bottom / dDotPermmY / 0.01) }; m_pIImage->Draw(*pDC, &rtDest, &rcSrc);}