如何使用Devil在vC++中保存圖像

Question

我在我的vC++應用程序中使用了DevIL。我需要保存一張圖片。我有以編程方式生成的位圖圖像。如何將圖像以png格式保存到特定位置？

Answer 1

BOOL CCreateHtml::CreateImage(IHTMLDocument2 *pDoc,LPCTSTR szDestFilename,CSize srcSize) 
{ 
    IHTMLDocument3* pDocument3 = NULL; 
    IHTMLDocument2* pDocument = NULL; 
    IHTMLElement2* pElement2 = NULL; 
    IHTMLElement* pElement  = NULL; 
    IViewObject2* pViewObject = NULL; 
    IDispatch* pDispatch  = NULL; 
    IViewObject* pViewObj = NULL; 

    HRESULT hr; 

    long bodyHeight; 
    long bodyWidth; 
    long rootHeight; 
    long rootWidth; 
    long height; 
    long width; 
    CImage img; 
     if(FAILED(m_pBrowser->get_Document(&pDispatch))) 
     return FALSE; 
    if(FAILED(pDispatch->QueryInterface(IID_IHTMLDocument2,(void**)&pDocument))) 
     return FALSE; 
    if(FAILED(pDocument->get_body(&pElement))) 
     return FALSE; 
    if(FAILED(pElement->QueryInterface(IID_IHTMLElement2,(void**)&pElement2))) 
     return FALSE; 
    if(FAILED(pElement2->get_scrollHeight(&bodyHeight))) 
     return FALSE; 
    if(FAILED(pElement2->get_scrollWidth(&bodyWidth))) 
     return FALSE; 
    if(FAILED(pDispatch->QueryInterface(IID_IHTMLDocument3,(void**)&pDocument3))) 
     return FALSE; 
    if(FAILED(pDocument3->get_documentElement(&pElement))) 
     return FALSE; 
    if(FAILED(pElement->QueryInterface(IID_IHTMLElement2,(void**)&pElement2))) 
     return FALSE; 
    if(FAILED(pElement2->get_scrollHeight(&rootHeight))) 
     return FALSE; 
    if(FAILED(pElement2->get_scrollWidth(&rootWidth))) 
     return FALSE; 

    HBITMAP m_hBmp; 
    width = bodyWidth; 
    height = rootHeight > bodyHeight ? rootHeight : bodyHeight; 

    if(width > 2000) 
     width = 2000; 
    if(height > 2000) 
     height = 2000; 

    MoveWindow(0,0,width,height,TRUE); 
    ::MoveWindow(m_hwndWebBrowser,0,0,width,height,TRUE); 

    if(FAILED(m_pBrowser->QueryInterface(IID_IViewObject2,(void**)&pViewObject))) 
     return FALSE; 

    CDC *cdcMain = GetDC(); 
    HDC hdcMain = *cdcMain; 
    HDC hdcMem = CreateCompatibleDC(hdcMain); 
    m_hBmp = CreateCompatibleBitmap(hdcMain,width,height); 
    SelectObject(hdcMem,m_hBmp); 

    RECTL rcBounds = { 0, 0, width, height }; 

    hr = pViewObject->Draw(DVASPECT_CONTENT, -1, NULL, NULL,hdcMain,hdcMem, &rcBounds, NULL, NULL, 0); 


     //Here is the code for saving an image as png 

    CreateImage(); 
    ILHANDLE devHandle = m_hBmp; 
    ilInit(); 
    ilBindImage(iluGenImage()); 
    ilLoadImage("123.bmp"); 

    ilSaveImage("abc1.png"); 

    pViewObject->Release(); 
    return TRUE; 
} 


//This method is used to save a .bmp image as a bitmap stream 

BOOL CCreateHtml::CreateImage() 
{ 
    BITMAP bmp; 
    HBITMAP hBmp = m_hBmp; 
    int n= ::GetObject(hBmp,sizeof(BITMAP),&bmp); 
    BITMAPFILEHEADER bmfHeader;  
    BITMAPINFOHEADER bi; 


    bi.biSize = sizeof(BITMAPINFOHEADER);  
    bi.biWidth = bmp.bmWidth;  
    bi.biHeight = bmp.bmHeight; 
    bi.biPlanes = 1;  
    bi.biBitCount = 32;  
    bi.biCompression = BI_RGB;  
    bi.biSizeImage = 0; 
    bi.biXPelsPerMeter = 0;  
    bi.biYPelsPerMeter = 0;  
    bi.biClrUsed = 0;  
    bi.biClrImportant = 0; 

    DWORD dwBmpSize = ((bmp.bmWidth * bi.biBitCount + 31)/32) * 4 * bmp.bmHeight; 
    HANDLE hDIB = GlobalAlloc(GHND,dwBmpSize); 
    char *lpbitmap = (char *)GlobalLock(hDIB); 
    int m = GetDIBits((HDC)GetDC(), hBmp, 0, 
     (UINT)bmp.bmHeight, 
     lpbitmap, 
     (BITMAPINFO *)&bi, DIB_RGB_COLORS); 

    CString str = "captureqwsx.bmp"; 
    LPCSTR fNam =(LPCSTR)(LPCTSTR) str; 

    HANDLE hFile = CreateFile(fNam, 
     GENERIC_WRITE, 
     0, 
     NULL, 
     CREATE_ALWAYS, 
     FILE_ATTRIBUTE_NORMAL, NULL); 
    DWORD dwSizeofDIB = dwBmpSize + sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER); 
    //Offset to where the actual bitmap bits start. 
    bmfHeader.bfOffBits = (DWORD)sizeof(BITMAPFILEHEADER) + (DWORD)sizeof(BITMAPINFOHEADER); 
    bmfHeader.bfSize = dwSizeofDIB; 
    bmfHeader.bfType = 0x4D42; //BM 

    DWORD dwBytesWritten = 0; 
    WriteFile(hFile, (LPSTR)&bmfHeader, sizeof(BITMAPFILEHEADER), &dwBytesWritten, NULL); 
    WriteFile(hFile, (LPSTR)&bi, sizeof(BITMAPINFOHEADER), &dwBytesWritten, NULL); 
    WriteFile(hFile, (LPSTR)lpbitmap, dwBmpSize, &dwBytesWritten, NULL); 

    //Unlock and Free the DIB from the heap 
    GlobalUnlock(hDIB);  
    GlobalFree(hDIB); 

    //Close the handle for the file that was created 
    CloseHandle(hFile); 

    //Clean up done: 
    //DeleteObject(hBmp); 
    return TRUE; 
}