Re: Better than the Startup folder - C / C++ / MFC Discussion Boards

clintsinger30-Oct-01 14:22

30-Oct-01 14:22

I have a DIB where I need to access the pixel values so I can read and write to them. I have tried using CreateDIBSection but that doesn't seem to give me a pointer to the original image but rather an entirely new image. Is there some way to get create a pointer to the pixel data of the original DIB?

Please Help,
Clint

Re: How to get the bits from a DIB?

Christian Graus30-Oct-01 14:37

Christian Graus

30-Oct-01 14:37

Is it a DIB or a DIBSection ? If the latter, just use GetObject.

DIBSECTION dib;
GetObject(hBitmap, sizeof(DIBSECTION), dib);

Christian

After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001

Re: How to get the bits from a DIB?

clintsinger31-Oct-01 6:03

clintsinger

31-Oct-01 6:03

What I have is a DIB that I get back from a third party DLL. It takes a raw buffer, decompresses it and sends back a 24-bit dib. I want to be able to now go in and access the original bits so I can modify them ( sharpen/ motion detection) as quickly as possible. Then draw them on the screen quickly afterwards.

Please Help,
Clint Smile | :)

Re: How to get the bits from a DIB?

C^hris L^osinger31-Oct-01 6:22

C^hris L^osinger

31-Oct-01 6:22

see the MSDN for BITMAPINFOHEADER . you have to understand how DIBs are setup, in order for you to be able to get at the pixels.

here it is in a nutshell:

a 24 bit DIB (one of the simplest of the DIBs) is usually a chunk of memory that starts with a BITMAPINFOHEADER structure. immediately after that struct are the pixel bytes.

pixel rows are generally stored in a bottom-up order, so the first pixel byte is the bottom-left pixel. (top-down DIBs have a negative height).

pixel rows are always a multiple of four bytes wide; they have padding bytes at the end, if necessary, to make the total number of row bytes equal to a multiple of four.

pixels are stored BGRBGRBGR... (Blue, Green, Red). three pixels per byte, no padding between pixels (except at row ends, when necessary).

-c

http://www.smalleranimals.com

Better than the Startup folder

Jason Hooper30-Oct-01 14:12

Jason Hooper

30-Oct-01 14:12

I know some programs automatically start when the Windows OS is launched, but they are not in the Startup menu. The best I've been able to figure out so far is that it is a registry addition you must make to load your program. Where should I be looking for more information about this?

Thanks,

Suspicious | :suss:

-Jason

Re: Better than the Startup folder

Christian Graus30-Oct-01 15:03

Christian Graus

30-Oct-01 15:03

There's two - Run and RunOnce ( which runs the program then deletes the entry ). I dunno where they are, I always find them by searching for 'RunOnce'.

Christian

After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001

Re: Better than the Startup folder

Michael Martin30-Oct-01 15:42

Michael Martin

30-Oct-01 15:42

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce

Michael Martin
Pegasystems Pty Ltd
Australia
martm@pegasystems.com
+61 413-004-018

"Don't belong. Never join. Think for yourself. Peace"
- Victor Stone

Re: Better than the Startup folder

Nish Nishant30-Oct-01 16:18

Nish Nishant

30-Oct-01 16:18

Put it in HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run if you want it for all users

Nish

Re: Better than the Startup folder

Jason Hooper30-Oct-01 23:32

Jason Hooper

30-Oct-01 23:32

Hello. Thanks for responding so quickly. I've got a followup question:

    // add the key
<br>
    CRegKey key;
<br>
    key.Open(HKEY_LOCAL_MACHINE, "\\Software\\Microsoft\\Windows\\CurrentVersion\\Run");
    key.SetKeyValue("Igloo", "foo");
    key.Close();

This tends to ASSERT. Do you immediately spot anything wrong with the method I'm using to add a Name "Igloo" and a value "foo" (which will be the program's filespec.)

Suspicious | :suss:

-Jason

Re: Better than the Startup folder

solex30-Oct-01 23:37

solex

30-Oct-01 23:37

I'd say the \\Software\\... should be just Software\\.....

A vast majority of our imports comes from outside the country.
George W. Bush

Re: Better than the Startup folder

Rick Crone31-Oct-01 9:21

Rick Crone

31-Oct-01 9:21

In Win2000 in the control panel there is Scheduled Tasks. You can set this up there. It may just make the registery entry for you... but it is easy.

Strange owner-draw CButton problem...

Simon Walton30-Oct-01 13:39

Simon Walton

30-Oct-01 13:39

Not so much of a problem, since i've fixed it now with a workaround. But i am interested as to exactly why it happened.

I created a custom button, derived from cbutton (obviously). I overrode the drawitem function and a few others to do some mouseover effects. The button was drawn to look exactly the same as a standard windows 9x button. I wanted to create a highlight when the user clicked on the button. So, before drawing the rectangle for the border of the button, i created and selected a lighter grey brush for the highlight;

if(lpDrawItemStruct->itemState & ODS_SELECTED)
{
Create and select much lighter gray brush
Draw rectangle
Delete the brush
}

The problem is, when i release the mouse button, the lighter gray brush is still drawn, even though the button isn't selected. It stays there until the cursor moves out of the button's rectangle. Therefore, when drawitem is called, it can't be going through the above if since itemState is not going to contain ODS_SELECTED. I also checked this using TRACE. Anyone know why? It's probably blindingly obvious, but it's getting late and my head hurts. Dead | X|

My workaround was to invalidate the button during OnLButtonUp().

Simon

Resizing Icon In CRichEditView

Vinnie Drysdale30-Oct-01 12:18

Vinnie Drysdale

30-Oct-01 12:18

When I call CRichEditView::InsertFileAsObject, I can't figure out how to resize the file icon that appears in the rich edit control. I've tried overriding such things as COleContainerItem::OnGetItemPosition and calling COleContainerItem::SetItemRects, but either they do nothing or cause assertions. Thanks for the Help.

Debug symbols for WinXP

Sam C30-Oct-01 11:00

Sam C

30-Oct-01 11:00

Does anyone know where I can download the Debug symbols for Windows XP? Or is it part of the platform SDK? If so, is there a way to download that information independent of the other information on the SDK?

Thanks in advance for any answer. Sorry if this sounds all dicombobulated, had too much coffee trying to figure out a problem I'm having. :-|

Sam C
----
Systems Manager
Hospitality Marketing Associates

How to get browser version?

30-Oct-01 9:34

What's the easiest way to get IE browser version? I'm using: The "Machine generated IDispatch wrapper class(es) created by Microsoft Visual C++" called CWebBrowser2, and the IWebBrowser2 interface.

Re: How to get browser version?

Michael Dunn30-Oct-01 11:34

Michael Dunn

30-Oct-01 11:34

I think the most reliable way is to read the version resource (or call DllGetVersion) in shdocvw.dll. 4.71.* is IE 4, 4.72.* is IE 4.01, 5.* is IE 5, and 6.* is IE 6.

--Mike--
http://home.inreach.com/mdunn/
This posting is provided "as was" with no warranties, guarantees, lotteries, or any of those little bags of peanuts you get on planes. You assume all risk for crossing the street without holding mommy's hand. © 2001 Mike's Classy Software. Member FDIC. If rash develops, discontinue use.
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OpenGL Animation

30-Oct-01 8:51

My program uses OpenGL to animate in a window. But when that window is minimized the pictures still remain on screen and still animate. Does anyone know how to get rid of this problem.

Re: OpenGL Animation

Todd Smith30-Oct-01 8:57

Todd Smith

30-Oct-01 8:57

You need the CS_OWNDC flag when you create the opengl window.

Todd Smith

Re: OpenGL Animation

30-Oct-01 9:12

do you know were to place the CS_OWNDC

Re: OpenGL Animation

30-Oct-01 10:11

the reason I ask is because I placed it at the precreatewindow() and it does not work

overload operator... a begginner info

Remi Morin30-Oct-01 8:31

Remi Morin

30-Oct-01 8:31

struct a
{
   double Val1;
   double Val2;
   double Val3;
}

how do I overload the operator (+,-,*,/) and (+=,-=,*=,/=,=)

I know that I will be something like

a a::operator + (a paramA1,a paramA2)
{
    paramA1.Val1 += paramA2.Val1;
    paramA1.Val1 += paramA2.Val1;
    paramA1.Val1 += paramA2.Val1;
    return paramA1;
}

but for the X= (+=,-=...)
I want it clean... and I was'nt able to find the ABC of overloading operator's the rules and the basis.

thanks

Remi Morin
Rmorin@Operamail.com
Remi.Morin@Lyrtech.com

Re: overload operator... a begginner info

Tomasz Sowinski30-Oct-01 10:08

Tomasz Sowinski

30-Oct-01 10:08

I was'nt able to find the ABC of overloading operator's the rules and the basis.

Where did you search?

Tomasz Sowinski -- http://www.shooltz.com

Re: overload operator... a begginner info

Remi Morin30-Oct-01 10:26

Remi Morin

30-Oct-01 10:26

in msdn...
I've found that I can overload many operator, += << etc.
and I cannot overload . :: ?:
but no example, for a struct, a class, they said that we can define them as global but when I tried to do it with the = operator.. it didn't work (I've uderstand that I need "this->data"). So, what I want it's the philosophy, my overloaded operator work but I don't think it's the way to do that...

struct AStruct
{ 
   double data[100];
   AStruct &AStruct::operator=	(AStruct paramA);
};

It's a very beginner info I know but "overloading operator" I'm Ok, but do it well... it's may be an other thing

Remi Morin
Rmorin@Operamail.com
Remi.Morin@Lyrtech.com

Re: overload operator... a begginner info

Tomasz Sowinski30-Oct-01 10:39

Tomasz Sowinski

30-Oct-01 10:39

You should read some good C++ book first - 'C++ Language' by Stroustrup or 'Effective C++' by Meyers.

You should pass AStruct by const reference. It's much more effective than passing by value, which involves calling a copy constructor. This applies to all operators and 'normal' functions as well.

Tomasz Sowinski -- http://www.shooltz.com

Re: overload operator... a begginner info

Michael Dunn30-Oct-01 17:21

Michael Dunn

30-Oct-01 17:21

For operators where the left argument is an "a" object, make the method a member of the class:

struct a
{
  double d1, d2, d3;
  a operator+ (const a& rhs) const;
};
 
a a::operator+ ( const a& rhs ) const
{
a retval;
 
  retval.d1 = d1 + rhs.d1;   // note "d1" is accessing this->d1
  retval.d2 = d2 + rhs.d2;
  retval.d3 = d3 + rhs.d3;
 
  return retval;
}

For operators where the left argument is not an "a", you need to make the method global:

a operator+ (const double d, const a& rhs )
{
a retval;
 
  a.d1 = d + rhs.d1;
  a.d2 = d + rhs.d2;
  a.d3 = d + rhs.d3;
 
  return retval;
}

Note that if you had a class, and the global operator+ needed to access protected/private members of "a", then the global func would have to be declared as a friend.

--Mike--
http://home.inreach.com/mdunn/
This posting is provided "as was" with no warranties, guarantees, lotteries, or any of those little bags of peanuts you get on planes. You assume all risk for crossing the street without holding mommy's hand. © 2001 Mike's Classy Software. Member FDIC. If rash develops, discontinue use.
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