2. Если c gdi, и предполагается наличие ИЕ в системе, то можно воспользоваться объектом
IPicture - маленько покорявее, но тоже работает - (забыл - вроде как с аним. гифами не работает - в проекте задача не стояла их показывать)
B .h
LPPICTURE m_pPicture;
SIZE m_sizeInPix;
SIZE m_sizeInHiMetric;
CRect m_rc;
int m_nWidthInHiMetric; // rectangle Width in HI METRIC
int m_nHeightInHiMetric;// rectangle Height in HI METRIC
CString m_stImgName;
.cpp
CImgItem::CImgItem()
{
m_pPicture = NULL;
m_nWidthInHiMetric = 10;
m_nHeightInHiMetric = 10;
}
BOOL CImgItem::InitImg(CString stImgName, CString stImgFile, CRect rc, BOOL bAutoSize)
{
IPicture *pPic = NULL;
USES_CONVERSION;
HRESULT hr = ::OleLoadPicturePath(const_cast<LPOLESTR>(T2COLE(stImgFile)),
NULL,
0,
0,
IID_IPicture,
reinterpret_cast<LPVOID *>(&pPic));
if (SUCCEEDED(hr) && pPic != NULL)
{
ASSERT(m_pPicture == NULL);
m_pPicture = pPic;
// get width and height of picture
VERIFY(SUCCEEDED(m_pPicture->get_Width(&m_sizeInHiMetric.cx)));
VERIFY(SUCCEEDED(m_pPicture->get_Height(&m_sizeInHiMetric.cy)));
const int HIMETRIC_PER_INCH = 2540;
const HDC hDCScreen = ::GetDC(NULL);
ASSERT(hDCScreen != NULL);
// Pixels per logical inch along width
const int nPixelsPerInchX = ::GetDeviceCaps(hDCScreen, LOGPIXELSX);
// Pixels per logical inch along height
const int nPixelsPerInchY = ::GetDeviceCaps(hDCScreen, LOGPIXELSY);
VERIFY(::ReleaseDC(NULL, hDCScreen) != 0);
// convert himetric to pixels
m_sizeInPix.cx = (nPixelsPerInchX * m_sizeInHiMetric.cx +
HIMETRIC_PER_INCH / 2) / HIMETRIC_PER_INCH;
m_sizeInPix.cy = (nPixelsPerInchY * m_sizeInHiMetric.cy +
HIMETRIC_PER_INCH / 2) / HIMETRIC_PER_INCH;
m_stImgName = stImgName;
m_rc = rc;
if(bAutoSize)
{
m_rc.right = m_rc.left+m_sizeInPix.cx;
m_rc.bottom = m_rc.top+m_sizeInPix.cy;
}
// Convert m_rc Width and Height to Metric
// convert pixels to metric
m_nWidthInHiMetric = (m_rc.Width()*HIMETRIC_PER_INCH - HIMETRIC_PER_INCH/2)/nPixelsPerInchX;
m_nHeightInHiMetric = (m_rc.Height()*HIMETRIC_PER_INCH - HIMETRIC_PER_INCH/2)/nPixelsPerInchY;
}
else
{
// OleLoadPicturePath failed.
::AfxMessageBox("Error", MB_OK | MB_ICONHAND);
return FALSE;
}
return TRUE;
}
void CImgItem::DrawImg(CDC *pDC)
{
if (m_pPicture != NULL)
{
// get palette
HPALETTE hPal = NULL;
VERIFY(SUCCEEDED(m_pPicture->get_hPal(reinterpret_cast<OLE_HANDLE *>(&hPal))));
CPalette *pPalOld = NULL;
if (hPal != NULL)
{
pPalOld = pDC->SelectPalette(CPalette::FromHandle(hPal), FALSE);
pDC->RealizePalette();
}
// transparent?
DWORD dwAttr = 0;
if (FAILED(m_pPicture->get_Attributes(&dwAttr)) ||
(dwAttr & PICTURE_TRANSPARENT))
{
// use an off-screen DC to prevent flickering
CDC MemDC;
VERIFY(MemDC.CreateCompatibleDC(pDC));
CBitmap Bmp;
VERIFY(Bmp.CreateCompatibleBitmap(pDC,
m_sizeInPix.cx,
m_sizeInPix.cy));
CBitmap *pBmpOld = MemDC.SelectObject(&Bmp);
CPalette *pPalMemOld = NULL;
if (hPal != NULL)
{
pPalMemOld = MemDC.SelectPalette(CPalette::FromHandle(hPal), FALSE);
MemDC.RealizePalette();
}
const RECT rc = { 0, 0, m_sizeInPix.cx, m_sizeInPix.cy };
MemDC.FillSolidRect(&rc, ::GetSysColor(COLOR_WINDOW));
// display picture using IPicture::Render
VERIFY(SUCCEEDED(m_pPicture->Render(MemDC.GetSafeHdc(),
0,
0,
m_sizeInPix.cx,
m_sizeInPix.cy,
0,
m_sizeInHiMetric.cy,
m_sizeInHiMetric.cx,
-m_sizeInHiMetric.cy,
&rc)));
VERIFY(pDC->BitBlt(0, 0, m_sizeInPix.cx, m_sizeInPix.cy,
&MemDC, 0, 0, SRCCOPY));
MemDC.SelectObject(pBmpOld);
if (pPalMemOld != NULL)
{
ASSERT(hPal != NULL);
MemDC.SelectPalette(pPalMemOld, FALSE);
}
}
else
{
// display picture using IPicture::Render
VERIFY(SUCCEEDED(m_pPicture->Render(pDC->GetSafeHdc(),
m_rc.left,//0,
m_rc.top,//0,
m_rc.Width(),//m_sizeInPix.cx,
m_rc.Height(),//m_sizeInPix.cy,
0,
m_sizeInHiMetric.cy,
m_nWidthInHiMetric,//m_sizeInHiMetric.cx,
-m_nHeightInHiMetric,//-m_sizeInHiMetric.cy,
&m_rc)));
}
if (pPalOld != NULL)
{
ASSERT(hPal != NULL);
pDC->SelectPalette(pPalOld, FALSE);
}
}
}
void CImgItem::ClearImg()
{
if (m_pPicture != NULL)
{
m_pPicture->Release();
m_pPicture = NULL;
}
}
зы если что-то непонятно - спрашивай, всё расписывать времени нету, сорри
ну и конечно посмотри codeguru codeproject там такого добра навалом
