This article demonstration code package download: pic_test.rar <- temporarily unable to download, A bird looks for new free space common way 0, use GIF89A class: advantage: a quick and easy to eat, dynamic GIF two sentences, simple and convenient and shortcomings : Sometimes edge effects, some images will be very obvious: #include "gif89a.h" CGIF89A * GIF; Add: gif = new cgif89a (this-> m_hwnd); gif-> loading Test.gif "); GIF-> setPosition (100, 100); GIF-> Play ();
// gif-> pause (true); // pause (true) is a playback of GIF // gif-> pause (false); // pause (false) To continue with GIF playback Common Ways 1, use iPicture: advantage : MS early picture class, you can display all static pictures, display dynamic GIF still need a GIF image storage structure Gifimage, if you are interested, you can see how Xuebi shows dynamic GIF shortcomings in VC: user independent definition Not very convenient, Xue Bi Article is introduced in RC static editing to display dynamic GIF approach. I originally intended to rewrite the GIF class, I found GIF89a, so I didn't make excess work modulation method: cstring spath;
Spath = _t ("1.jpg"); // CDC * PDC = getDLGITEM (IDC_Control) -> getdc (); // Get control DC CRECT ZCRECT; getClientRect (& zcRect); showjpgif (PDC, Spath, ZcRect.Left, ZcRect.top, zcRect.width (), zcRect.height ());
Function implementation
Bool Showjpgif (CDC * PDC, CString Strpath, Int x, Int Y, Int Width, Int Height)
{
IStream * PSTM;
CFILESTATUS FSTATUS;
CFILE FILE;
Long Cb;
// Open the file and detect the validity of the file
IF (file.open (strpath, cfile :: moderead) &&
File.getStatus (StrPath, FStatus) &&
((cb = fStatus.m_size)! = -1)))
{
Hglobal Hglobal = GlobalAlloc (GMEM_MOVEABLE, CB);
LPVOID PVDATA = NULL;
IF (hglobal! = null)
{
Pvdata = Globalock (Hglobal);
IF (PVData! = NULL)
{
File.read (PVDATA, CB);
GlobalUnlock (Hglobal);
CreatestReamonhglobal (Hglobal, True, & PSTM);
}
}
}
Else
{
Return False;
} // Open the end of the file
/ / Display images in JPEG and GIF formats, GIF can only display one frame, but also no animation,
/ / To display an animation GIF, use the Active control //.
IPicture * PPIC;
// load image from File Stream
IF (Succeeded (PSTM, FSTATUS.M_SIZE, TRUE, IID_IPICTURE, (LPVOID *) & PPIC)))))
{
OLE_XSIZE_HIMETRIC HMWIDTH;
OLE_YSIZE_HIMETRIC HMHEIGHT;
PPIC-> Get_Width (& HMWIDTH);
PPIC-> Get_Height (& hmheight);
Double fx, fy;
// Get Image Height and Width
FX = (double) PDC-> getDeviceCaps (Horzres) * (Double) HMWIDTH /
(Double) PDC-> getDeviceCaps (Horzsize) * 100.0;
Fy = (double) PDC-> getDeviceCaps (Vertres) * (double) hmheight /
(Double) PDC-> getDeviceCaps (Vertsize) * 100.0;
// Use render function display image
IF (Failed (PPIC-> Render (* PDC, X, Y, Width, Height, 0,
Hmheight, hmwidth,-hmheight, null)) {
PPIC-> Release ();
Return False;
}
PPIC-> Release ();
}
Else
{
Return False;
}
Return True;
} Common way 2, use MS CIMAGE Advantages: MS CiMage, MFC / ATL Universal, should be reliable, easy to use is very simple, more flexible, destination should be the disadvantage of Ipicture class: still can't make perfect solution Dynamics GIF Question, #include
/ / Get filter string of image file supported by CImage HRESULT = m_image.GETEXPORTERFILTERSTRING (Strfilter, AguidFileTypes, _T ("all Image files")); if (failed (hResult) {MessageBox ("GetExporterfilter call failed!"); Cfiled; cfiledialog DLG (True, NULL, NULL, OFN_FILEMUSTEXIST, STRFILTER); if (iDok! = DLG.DOMODAL ()) Return;
m_image.destroy (); // Load the external image file into the CImage object HRESULT = M_Image.Load (DLG.GetFileName ()); if (Failed) {MessageBox ("calling image file failed!"); Return }
/ / Set the main window title bar content cstring str; str.loadstring (AFX_IDS_APP_TITLE); AFXGETMAINWND () -> setWindowText (STR "-" DLG.GetFileName ());
Invalidate (); // Forced call overdraw // ps: The following insertion Heavy Pictures VOID CTEMP7VIEW :: OnDRAW (CDC * PDC) {ctemp7doc * pdoc = getDocument (); assert_valid (pdoc); // Todo: here This machine data adds drawing code if (! M_image.isnull ()) {crect zcRect; getClientRect (& zcRect); m_image.draw (pdc-> m_hdc, zcRect.Width (), zcRect.height (), zcRect.height ());
}
