在VC中怎样显示PNG图片

[cafecai]

[蒋晟]

用IE控件浏览

[蒋晟]

你要编辑.PNG?

[cafecai]

在VC中怎样显示PNG图片

[cafecai]

jiangsheng(蒋晟)：
用IE控件浏览不能对图片进行操作

[cafecai]

关注

[jisheng]

顺便了解一下，如何显示jpg和gif？？？？？？？？？？？？？？

[cafecai]

jisheng(古朴的狼):
一下的代码可以显示BMP、JPG、GIF，但PNG就不行了，有知道显示PNG的代码吗？请高手相助！！！！！

void CPICView::OnDraw(CDC* pDC)
{
CPICDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);


IPicture *pPic;
IStream *pStm;

CFileStatus fstatus;
CFile file;
LONG cb;
//m_PicFile可以是BMP、JPG、GIF，但PNG就不行了
if (file.Open(m_PicFile,CFile::modeRead)&&file.GetStatus(m_PicFile,
fstatus)&&((cb = fstatus.m_size) != -1))
{
HGLOBAL hGlobal = GlobalAlloc(GMEM_MOVEABLE, cb);
LPVOID pvData = NULL;
if (hGlobal != NULL)
{
if ((pvData = GlobalLock(hGlobal)) != NULL)
{
file.ReadHuge(pvData, cb);
GlobalUnlock(hGlobal);
CreateStreamOnHGlobal(hGlobal, TRUE, &pStm);

if(SUCCEEDED(OleLoadPicture(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;
fX = (double)pDC->GetDeviceCaps(HORZRES)*(double)hmWidth/((double)pDC->Ge
tDeviceCaps(HORZSIZE)*100.0);
fY = (double)pDC->GetDeviceCaps(VERTRES)*(double)hmHeight/((double)pDC->G
etDeviceCaps(VERTSIZE)*100.0);
if(FAILED(pPic->Render(*pDC,0,0,(DWORD)fX,(DWORD)fY,0,hmHeight,hmWidth,-h
mHeight,NULL)))
AfxMessageBox("Failed To Render The picture!");
pPic->Release();
}
else
AfxMessageBox("Error Loading Picture From Stream!");
}
}
}
else
AfxMessageBox("Can't Open Image File!");
}

[cafecai]

关注

[gangyaocn]

在下列网址上找：
www.paintlib.http://www.paintlib.de/paintlib/
有源代码

[vc_mira]

Use GDI+ or a third-party library like paintlib, ImageMagick, or ImageLibrary.

See Also: Christian Graus's GDI+ articles in the .NET section; Peter Hendrix's article "Simple class for drawing pictures."--> http://www.codeproject.com/bitmap/cpicture.asp
(不知道能不能解决你的问题，自己琢磨吧，有问题再问[e-mail])