C / C++ / MFC

Alpha channel manipulation: CImage ?

14-Jun-07 22:31

See Using thumbnail images in a list control[^]

WhiteSky

HappyFunBall14-Jun-07 21:54

HappyFunBall

14-Jun-07 21:54

CImage::Create(...) lets me create an alpha channel,

but how do I change the bits in it?

I'd like to use TextOut and create a blurred shadow effect for a text image.

Re: Alpha channel manipulation: CImage ?

Hamid_RT14-Jun-07 22:27

Re: Alpha channel manipulation: CImage ?

14-Jun-07 22:27

if you want to set some effects to your images or texts you can use of GDI+ for example(GetTextContrast or Graphics::DrawString) and also CImage has a function AlphaBlend that you can use of it.

WhiteSky

Mark Salsbery15-Jun-07 7:02

Mark Salsbery

15-Jun-07 7:02

HappyFunBall wrote:
but how do I change the bits in it?

The CImage::GetPitch() and CImage::GetBits() methods provide direct access to the image's pixel
data.

CImage::GetBits() gets you a pointer to the image pixel data.

CImage::GetPitch() is the bytes-per-row, and if it's negative, CImage::GetBits() returns a pointer
to the LAST row of the image, so you can use the signed value returned by CImage::GetPitch()
to iterate through the rows of pixel data.

The layout of the pixel data varies depending on the format of the bitmap.
For a 32bit-per-pixel ARGB image, the pixel data bytes are layed out RGBARGBARGBA... so if you
take each pixel as a DWORD, the high order byte is the alpha channel byte.

Hope this helped!
Mark

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Menu Problem again

Karismatic14-Jun-07 21:23

Karismatic

14-Jun-07 21:23

Hey,

I have appended a new menu item at the end of the existing menu
i.e after Help Menu.

Now i want to create its submenu tried not not successful.

Pls help me out

Regards,
Pankaj Sachdeva

Hamid_RT14-Jun-07 21:52

14-Jun-07 21:52

See this thread "~~How to close the running appliaction~~" "Creating and Adding Menu at runtime" below the forum.

WhiteSky

Karismatic14-Jun-07 22:52

Karismatic

14-Jun-07 22:52

what????????????

Hamid_RT14-Jun-07 23:03

14-Jun-07 23:03

It was a syntax error;) oh I think you are a new asker.After make it whats problem what you are not successful?

WhiteSky

Karismatic14-Jun-07 23:14

Karismatic

14-Jun-07 23:14

I have appended a new menu item at the end of the existing menu
i.e after Help Menu.

Now i want to create its submenu using InsertMenu tried not not successful.

I basically want to create the submenu that is the main task

Roger Allen15-Jun-07 16:04

Roger Allen

15-Jun-07 16:04

This article of mine explains about adding menus etc to exising ones:

http://www.codeproject.com/menu/MenusForBeginners.asp[^]

If you vote me down, my score will only get lower

Post messages to theApp

kcynic14-Jun-07 20:34

kcynic

14-Jun-07 20:34

As we know,all the project based MFC has a main thread object theApp.
For some reason,I have to send messages to it,but how should I return messages to the posters?
Thanks.

CPallini14-Jun-07 21:45

CPallini

14-Jun-07 21:45

kcynic wrote:
For some reason,I have to send messages to it

That's fine.

kcynic wrote:
but how should I return messages to the posters?

Well, it depends on the posters nature (for instance, it maybe the main thread itself).

Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

kcynic14-Jun-07 22:38

kcynic

14-Jun-07 22:38

Would you like to explain it more clearly?
I think I did not understand you very well.
Thanks

CPallini14-Jun-07 22:43

CPallini

14-Jun-07 22:43

I think you should describe with more details your problem.
It isn't difficult to post messages to the main thread of an application. As result, the main thread will perform some actions, if you want the main thread to communicate with the message poster then the kind of the performed action will depend on the nature of the poster itself (for instance, if the main thread itself posted the message, the related answer maybe a function call; on the other hand, if the message posting happens in another thread then the main thread may answer by changing some shared data value, etc..).

Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

Question about a global mouse hook??

kcynic15-Jun-07 0:53

kcynic

15-Jun-07 0:53

I have thread which has a socket member,and I should using such thread to send data to the others in different windows.But if I simply pass the thread pointer there would something go wrong.So,I want to create the thread in the theApp.So,other dialog would send messages to it and also should get the returned messages from the theApp.
That is my task.
Thanks very much.

Avril-Sun14-Jun-07 19:31

Avril-Sun

14-Jun-07 19:31

Hi,

I use a global mouse hook(WM_MOUSE_LL) to capture all mouse action.
This lead to my mouse delay and the mouse is not sensitive.
You'll feel very bad when you use move the mouse.
How can i deal it?
Or is there other smart way to capture mouse action?
I must capture all mouse action in my system,Like,

LRESULT CALLBACK MouseProc(int iCode,       // hook code<br />
			WPARAM wParam,  // virtual-key code<br />
			LPARAM lParam   // keystroke-message information)<br />
{<br />
  process... ... <br />
  return CallNextHookEx(m_hMouseHook, iCode, wParam, lParam) ;<br />
}

Thanks!

Avril-Sun

Re: Question about a global mouse hook??

Sarath C14-Jun-07 20:22

Sarath C

14-Jun-07 20:22

This link may help you out.

http://www.flounder.com/hooks.htm

I don't know how much effective it will be.

-Sarath.
"Great hopes make everything great possible" - Benjamin Franklin

My blog - Sharing My Thoughts, An Article - Understanding Statepattern

Re: Question about a global mouse hook??

Hamid_RT14-Jun-07 22:35

How to close the running appliaction

14-Jun-07 22:35

See Thunking MouseProc in IE add-in[^] for MouseProc.

WhiteSky

john563214-Jun-07 19:26

john5632

14-Jun-07 19:26

Hi,
How can i close a running apllication through programming.
I have a application ,i want whenever i run my application MS-Outlook should be clode,if running.

How can i do this.

Re: How to close the running appliaction

Hamid_RT14-Jun-07 19:33