How to load png file into picture control

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I have picture control on my startpage in visual studio. I have also a picture png in my resource.
But it is a problem to load it. Is it possible or we can only load bitmap?

What I have tried:

I wanted to load a picture from properties. But as it is not bmp, my file png it is not visible.

I tried also

m_pictureLogo.SetBitmap(MTOFileSystem::loadImage(Global::getPhotosDir() + "\\" + L"IDB_BITMAP_LOGO_NEW.png"));

but it does not work too.....

What to do?

Posted 4-Dec-17 23:18pm

Member 13495762

Updated 5-Dec-17 0:08am

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2 solutions

Solution 2

You might use the CPngImage Class[^] from the MFC Feature pack:

C++

#include <afxtoolbarimages.h>

CPngImage image;
image.Load(IDB_BITMAP_LOGO_NEW, AfxGetInstanceHandle());
// EDIT: Must cast here
//m_pictureLogo.SetBitmap(image.Detach());
m_pictureLogo.SetBitmap((HBITMAP)image.Detach());

Posted 5-Dec-17 0:08am

Jochen Arndt

Updated 5-Dec-17 22:14pm

v2

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Member 13495762 6-Dec-17 3:42am

Hi, it seems good. where should I put last two lines in cpp file?
image.Load(IDB_BITMAP_LOGO_NEW, AfxGetInstanceHandle());
m_pictureLogo.SetBitmap(image.Detach());
I put it in DoDataExchange, In last line of code there is an error
m_pictureLogo.SetBitmap(image.Detach()); ->argument of type "HGIOBJ" is incompatible wit parameter of type "HBITMAP" ....

Jochen Arndt 6-Dec-17 4:12am

Just cast the return value (I will update my solution):
m_pictureLogo.SetBitmap((HBITMAP)image.Detach());

I would place the code in the Init function of the parent window (CDialog: OnInitDialog, CView: OnInitialUpdate).

Member 13495762 6-Dec-17 4:20am

Thanks , I will try and let You know. I need png files to add becasue I need transparency

Jochen Arndt 6-Dec-17 4:31am

But you do know that the PNG is converted to a bitmap which is then shown by the control and the CStatic picture control does not support transparency?

Member 13495762 6-Dec-17 4:36am

I see...so it will not help me. I need to load png files (which have transperency) to my picture control boxes on our startpage instead of bmp file...

Jochen Arndt 6-Dec-17 5:53am

Bitmap files can also have transparency (one colour value is defined as transparent colour and the RGB value of that colour has to be passed to functions supporting transparent bitmaps).

But the CStatic based picture control does not support them. But you can for example draw directly to a window using BitBlt.

See for example https://www.codeproject.com/Articles/703/Drawing-Transparent-Bitmap-with-ease-with-on-the-f

Member 13495762 7-Dec-17 8:33am

It is quite difficult to use it for me. Is it possible somehow to use onPaint() method to draw this png on Picture Control?

Jochen Arndt 7-Dec-17 9:03am

It is possible. Read about owner / user drawn controls. But it is an advanced topic which requires learning (a lot of reading).

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Richard MacCutchan · Accepted Answer · 2017-12-04T23:32:00

Solution 1

Loading JPG & PNG resources using GDI+[^]

Posted 4-Dec-17 23:32pm

Richard MacCutchan

How to load png file into picture control

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Solution 1

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How to load png file into picture control

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