C / C++ / MFC Discussion Boards

Displaying a JPG in MFC

toothless boots30-Apr-04 18:08

toothless boots

30-Apr-04 18:08

I would like to know how to display a JPG or high res BMP image on a MFC Dialog window.

Re: Displaying a JPG in MFC

l a u r e n30-Apr-04 19:41

l a u r e n

30-Apr-04 19:41

find the cximage lib here on cp
Wink | ;)

"there is no spoon"
biz stuff about me

Re: Displaying a JPG in MFC

gUrM33T30-Apr-04 19:52

gUrM33T

30-Apr-04 19:52

Or use OleLoadPicture()

Gurmeet

BTW, can Google help me search my lost pajamas?

My Articles: HTML Reader C++ Class Library, Numeric Edit Control

Re: Displaying a JPG in MFC

f6430-Apr-04 20:19

f64

30-Apr-04 20:19

You can use OleLoadPicturePath load the picture from a file, you'll get an IPicture then use the method Render to display it into a DC.
Or, check Dr. Yovav Gad's article CPicture - The Yovav (Horror) PictureShow

Fabian

Audio/Video Processing

Billar30-Apr-04 17:28

Billar

30-Apr-04 17:28

Dear Friends,

I have to process the audio/video signal together after collecting the data from Video camera.

Anyone please write to me your valuable suggessions in this regard. Any kind of suggession related to such development(methods,technology etc) will help me a lot.

Thanks in advance.

Billar

Re: Audio/Video Processing

Alexander ^M.,1-May-04 0:48

Alexander ^M.,

1-May-04 0:48

Very interesting information I have to say...

Don't try it, just do it! Wink | ;-)

Re: Audio/Video Processing

Anonymous1-May-04 15:56

Anonymous

1-May-04 15:56

Dear Alexander

Will you please write to me something related to this. How?

Billar

Re: Audio/Video Processing

Billar1-May-04 16:50

Billar

1-May-04 16:50

Dear Alexander

Please write to How?

Confused | :confused:

Changing data in arrays with variables

Allan D Richards30-Apr-04 13:48

Allan D Richards

30-Apr-04 13:48

How would I change the data in a 6x5 char array in selected cells with a variable? i.e.

eeeeee
e
eee
e
eeeeee

How would I change the e's to g's and display the following?

gggggg
g
ggg
g
gggggg

AllanR

Re: Changing data in arrays with variables

valikac30-Apr-04 16:00

valikac

30-Apr-04 16:00

Just change it via [] operator.

variable[][] = 'g';

Kuphryn

Re: Changing data in arrays with variables

Terry O'Nolley30-Apr-04 17:00

Terry O'Nolley

30-Apr-04 17:00

<code>
char array[5][6];

for(int x = 0; x < 6; x++)
   for(int y=0; y < 5; y++)
      if(array[x][y] == 'e')      
         array[x][y] = 'g';
</code>

Glano perictu com sahni delorin!

Re: Changing data in arrays with variables

Allan D Richards30-Apr-04 18:12

Allan D Richards

30-Apr-04 18:12

Thanks Terry.

I had almost this code except I had a syntax error with a single "=" instead of "==" to test the character.

Re: Changing data in arrays with variables

Terry O'Nolley1-May-04 4:12

Terry O'Nolley

1-May-04 4:12

Allan D Richards wrote:
I had almost this code except I had a syntax error with a single "=" instead of "==" to test the character.

That is one of the most frustrating of bugs if you don't force yourself to remember that right off the start. It compiles and on many passes it even evaluates to the correct value.

Glano perictu com sahni delorin!

Time Functions

samtoad30-Apr-04 13:05

samtoad

30-Apr-04 13:05

Dear Wizards:

Are there any Time functions available on this
web page, all written in "C" with some DOC's?.

Thanks(TIA), VBFingers.

Re: Time Functions

Gary R. Wheeler30-Apr-04 13:16

Gary R. Wheeler

30-Apr-04 13:16

Ahem.

Look at the top of the page. You see our green friend Bob, the Code Project mascot? Below him in the orange bar is the word Search: and to the right is an edit field. Type the word 'time' (quotes not required) and click on the Go button to the right.

Software Zen: delete this;

Re: Time Functions

f6430-Apr-04 14:56

f64

30-Apr-04 14:56

Hi,
Windows has already a bunch of APIs for that purpose. Check this link
Platform SDK: Windows System Information. Time Functions

Fabian

timing question

k1ndbud30-Apr-04 13:03

k1ndbud

30-Apr-04 13:03

Was wondering how i would increase an integer in a c++ program for every second that passes by. Is this possible to do without making a connection to the windows systray timer? hopefully this could work in at most a few for loops Frown | :(

Re: timing question

f6430-Apr-04 14:50

f64

30-Apr-04 14:50

Hi,
Check the Platform SDK documentation, "Timer Functions"

Function                      Description 
KillTimer                     Destroys the specified timer. 
QueryPerformanceCounter       Retrieves the current value of the high-resolution performance counter. 
QueryPerformanceFrequency     Retrieves the frequency of the high-resolution performance counter. 
SetTimer                      Creates a timer with the specified time-out value. 
TimerProc                     An application-defined callback function that processes WM_TIMER messages.

So, create a TimerProc function where you can increase the variable by one, then use the SetTimer function to set the callback every 1000 milliseconds, that's it.

Fabian

Re: timing question

valikac30-Apr-04 16:02

valikac

30-Apr-04 16:02

Another solution is a thread that increment the variable very time interval.

Kuphryn

Monitoring CPU usage

jfrosty30-Apr-04 12:12

jfrosty

30-Apr-04 12:12

Hi. Does anybody know how I could monitor CPU usage (in %) in my Win32 application. Kinda like the Windows XP/2000 task manager. I know of performance counters, but I'd like a portable solution (the app must run on Windows 98 too).
And one other thing, how do I check if a given process (by name or ID), is, in fact, a Windows XP/2000 service?

Does it matter? Even if it does matter, does it matter that it matters?

Converting an in-process Component to Out-of-Process

saborio30-Apr-04 11:57

saborio

30-Apr-04 11:57

Hi, I was wondering on how difficult it is to convert a working in-process COM component (a dll) to an out of process COM component (an executable). The reason I am asking this is because I would like to move a dll to 64-bit while having the client in 32-bit. Due to the different architecture, they cannot run in the same process, so the only way to to this that I can think of is to have the server run as an out-of-process component. Any ideas? TIA.

Re: Converting an in-process Component to Out-of-Process

valikac30-Apr-04 16:02

valikac

30-Apr-04 16:02

Are you using ATL?

Kuphryn

Re: Converting an in-process Component to Out-of-Process

saborio1-May-04 6:21

saborio

1-May-04 6:21

I am actually using MFC, I would like to convert the COM component created in this tutorial:

http://www.codeproject.com/com/COM_from_scratch_1.asp?target=COM%7Cscratch

to an out of process COM component.

Thanks!

Re: Converting an in-process Component to Out-of-Process

Anonymous1-May-04 16:53

Anonymous

1-May-04 16:53

COM will let you run your in-proc server in a surrogate process. Try using dllhost.exe.

To do this, you can change your components settings by going into the OLE/COM Object Viewer. Select All Objects; Find your Component; Select the Implementation Tab and then check the "Use Surrogate Process" check box.

Re: Converting an in-process Component to Out-of-Process

saborio2-May-04 15:52

saborio

2-May-04 15:52

Thanks, I have looked into it and it makes sense. I have also looked into the 64-bit SDK documentation and found the following:

"...On 64-bit Windows, an out-of-process 32-bit COM server can communicate with a 64-bit client, and an out-of-process 64-bit COM server can communicate with a 32-bit client. Therefore, if you have a 32-bit DLL that is not COM-aware, you can wrap it in an out-of-process COM server and use COM to marshal calls to and from a 64-bit process..."

So if I use a native 64-bit dllhost.exe as a surrogate process for my native 64-bit dll component and call use it from a 32-bit exe, it will be running as an out-of-proc? Thanks for the help.

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