How i can render PNG image

 

 

 

I will try with CXTPGraphicBitmapPng.

 

An other question: where my PNG image suppos to be in my resource file, I mean  like icons it must be under ICON group & bitmap image must be under BITAMP group in my resource and so on (where PNG image must be). I try to set it under PNG group but it doesn't wok.

 

thank's for your help...

Thank's again oleg...

I have used this code and it works for load PNG image from file or from resource

 

---- Load PNG from local file

 

 

BOOL bAlpha=0;

HBITMAP hb = CXTPImageManagerIcon::LoadBitmapFromFile (pszFilePng, &bAlpha); 

 

---- Load PNG from resource

 

BOOL bAlpha = FALSE;

hb = CXTPImageManagerIcon::LoadBitmapFromResource(_T("IDB_PNG_IMAGE"),&bAlpha );

     

LPCTSTR lpszResource = MAKEINTRESOURCE(IDB_PNG_IMAGE);

HMODULE hModule = AfxFindResourceHandle( lpszResource, _T("PNG") );

     

BOOL bPngBitmap = CXTPImageManagerIcon::IsPngBitmapResource(hModule, lpszResource);

if (bPngBitmap)

{

      CXTPGraphicBitmapPng bmpIcons;

      HRSRC hResource = ::FindResource(hModule, lpszResource, _T("PNG"));

 

       if (!bmpIcons.LoadFromResource(hModule, hResource))

             TRACE0("Can't Load");

       

 BOOL lbAlphaBitmap = bmpIcons.IsAlpha();

 

 hb = (HBITMAP)bmpIcons.Detach();

}

 

Thanks to oleg

---- Also I found a post and I verified it and it work,, thanks to  danpetitt

 

The Problem is the look of my render; it doesn't draw the transparency in the right way

 

This my PNG render.

 

This windows XP Picture and Fax preview render

 

n  I used to render my image this code

void CChildView::OnPaint()

{

      CPaintDC pdc(this); // device context for painting

      CXTMemDC dc(&pdc, CRect(0,0,0,0)); // I used this to reduce filcker

     

CXTPImageManagerIcon::DrawAlphaBitmap(&dc, hb, CPoint(50,50), CSize(256,256), 0, CSize(256,256) );

 

 

}

since I can't upload my project, I have created a simple one that demonstrate the problem

this is the link

 

 

the project was create with VS2005

the file "ChildView.cpp" have my routine to load and draw the PNG image.

 

you can check my code, and I hope to figureout where I am wrong...

 

Thank's to you for help.

 

 

 

 

 

I try it and it work...