Re: Screen Capturing in JPG format and not Bitmap - C / C++ / MFC Discussion Boards

Screen Capturing in JPG format and not Bitmap

Dhiraj kumar Saini2-Dec-08 1:03

2-Dec-08 1:03

I want to make a screen capturing application which captures and stores in JPG or GIF format and not in Bitmap format.

I have examples from codeproject but all of them are using Bitmap b'coz of which when i save themin a bitmap file for sending to the server the file size if too much.

Thanks & Regards.

Dhiraj Kumar Saini

Re: Screen Capturing in JPG format and not Bitmap

Rajesh R Subramanian2-Dec-08 1:20

Rajesh R Subramanian

2-Dec-08 1:20

You can convert the bitmap to a JPG and then...

It is a crappy thing, but it's life -^ Carlo Pallini

Re: Screen Capturing in JPG format and not Bitmap

Dhiraj kumar Saini2-Dec-08 1:26

Dhiraj kumar Saini

2-Dec-08 1:26

If you can provide some code or example as to how ro convert it would of great help.

Re: Screen Capturing in JPG format and not Bitmap

Rajesh R Subramanian2-Dec-08 1:30

Rajesh R Subramanian

2-Dec-08 1:30

If you are using MFC, you could use CImage::Save() with ImageFormatJPEG or ImageFormatGIF as the guidFileType field.

Re: Screen Capturing in JPG format and not Bitmap

CPallini2-Dec-08 1:33

CPallini

2-Dec-08 1:33

Rajesh R Subramanian wrote:
If you are using MFC

Hey man, you're using your superpowers. Big Grin | :-D

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.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: Screen Capturing in JPG format and not Bitmap

Rajesh R Subramanian2-Dec-08 1:42

Rajesh R Subramanian

2-Dec-08 1:42

Well, my CPMRU is fully charged. Big Grin | :-D

It is a crappy thing, but it's life -^ Carlo Pallini

Re: Screen Capturing in JPG format and not Bitmap

Dhiraj kumar Saini2-Dec-08 1:37

Dhiraj kumar Saini

2-Dec-08 1:37

Thanks its working!

Re: Screen Capturing in JPG format and not Bitmap

Dhiraj kumar Saini2-Dec-08 18:33

Dhiraj kumar Saini

2-Dec-08 18:33

I am able to save it in JPG format but the size of the file is somewhere around 150KB. Is there any way I can Optimize the size to somewhere below 100KB as it needs to be sent to the server for real time monitoring.

Thanks In Advance

Re: Screen Capturing in JPG format and not Bitmap

Code-o-mat2-Dec-08 1:27

Code-o-mat

2-Dec-08 1:27

Use GDI+ to save to JPG. Once you have a HBITMAP containing the screenshot do Something like this (can't remember the correct objects/methods now so you will have to look them up, but it generally goes something like this):

Gdiplus::Bitmap Img; //or maybe Gdiplus::Image...
Img.Attach(hbitmap_screenshot); //or fromHBITMAP()...
Img.Save(path_to_save_to, Gdiplus::ImageFormatJPEG);
Img.Detach();

> The problem with computers is that they do what you tell them to do and not what you want them to do. <

Re: Screen Capturing in JPG format and not Bitmap

Dhiraj kumar Saini2-Dec-08 1:37

Dhiraj kumar Saini

2-Dec-08 1:37

Thanks Its Working Smile | :)

Re: Screen Capturing in JPG format and not Bitmap

A_xin2-Dec-08 4:26

A_xin

2-Dec-08 4:26

you can use CxImage class.CxImage is a C++ class to load, save, display, transform BMP, JPEG, GIF, PNG, TIFF, MNG, ICO, PCX, TGA, WMF, WBMP, JBG, J2K images

Problem in building DLL

maheshbhoir.home2-Dec-08 0:39

maheshbhoir.home

2-Dec-08 0:39

Hi,

I am moving project from MS Visual studio 7.1 to 8.0, in this I am facing problems in building DLL. Many projects get build successfully but while building one project compiler throws error as
"c:\program files\microsoft visual studio 8\vc\atlmfc\include\afx.h(24) : fatal error C1189: #error : Building MFC application with /MD[d] (CRT dll version) requires MFC shared dll version. Please #define _AFXDLL or do not use /MD[d]"

I didn't get how to solve this problem.

compiler throws this error only when building debug DLL and not in release DLL.

Please help me...... Frown | :(

Re: Problem in building DLL

Code-o-mat2-Dec-08 0:56

Code-o-mat

2-Dec-08 0:56

I don't know VS8.0, we're still using 7.x, but to me it looks like you are trying to link to MFC staticly but to CRT dinamycally and it doesn't like that. Does that make sense?

> The problem with computers is that they do what you tell them to do and not what you want them to do. <

Re: Problem in building DLL

maheshbhoir.home2-Dec-08 1:08

maheshbhoir.home

2-Dec-08 1:08

But in case of release build compiler doesn't gives errors .....
What reason would be behind this....??

Re: Problem in building DLL

Code-o-mat2-Dec-08 1:19

Code-o-mat

2-Dec-08 1:19

You have different settings for different targets? You can setup things so your debug builds use dynamic and your release builds use static linking or the other way around. Sometimes it happens that someone makes changes to the project settings but forgets to make those to all targets and only applies them to the currently set one and then when others try to build the release, bang, problem. I know it has happened to us a few times too, like i added additional include folders to the debug target but forgot to add them to the release target so when others tried to build the release, multiple "no such file or directoy"s. Fun.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <

C++ Accessing varibale Across Files

sachin_chakote1-Dec-08 23:54

sachin_chakote

1-Dec-08 23:54

I want to use varibale across multiple files. If the varibale is updated in one file its value should be visible from other file

how to achieve it ?
i tried static variable , extern could not solve my problem ..

Does Anyone have any idea

Sachin
Edit/Delete Message

Re: C++ Accessing varibale Across Files

CPallini2-Dec-08 0:09

CPallini

2-Dec-08 0:09

sachin_chakote wrote:
I want to use varibale across multiple files. If the varibale is updated in one file its value should be visible from other file

Your requirements define a global variable.

sachin_chakote wrote:
i tried static variable

With no luck, I suppose...

sachin_chakote wrote:
extern could not solve my problem ..

Actually extern will solve your problem, for instance, declare it extern in a common included header, say commonheader.h:

// This is commonheader.h

// Global variable declaration
extern int g_iMyCounter; 
//...

Then define it inside only one source file, for instance

// This is main.cpp

// Global variable definition
int g_iMyCounter;
//...

Finally include commonheader.h in whathever source file needs such variable, for instance

// this is auxiliary.cpp
#include "commonheader.h"

int incrementMyCounter()
{
  return ++g_iMyCounter;
}
//...

Re: C++ Accessing varibale Across Files

Jijo.Raj2-Dec-08 1:02

Jijo.Raj

2-Dec-08 1:02

sachin_chakote wrote:
i tried static variable , extern could not solve my problem ..

The purpoue of extern is to solve this situation. Check out this link[^].

Well, I recommend to go for a singleton class[^] with name CGlobalData [according to your choice], and make all your required global variables as its members. Then you could access your singleton class from all cpp files and can access the global data as well. Its more object oriented and more easier to maintain than global variables.

Regards,
Jijo.

_____________________________________________________

http://weseetips.com[^] Visual C++ tips and tricks. Updated daily.

Conversion from long to CString?

Le@rner1-Dec-08 23:46

Le@rner

1-Dec-08 23:46

Hi all,

what can i use for coversion of long to CString.
i m try this.
it is right

<br />
	long num=0;<br />
	CString str=_T("");<br />
	str.Format("%2d",num);<br />

thanks in advance.

IN A DAY, WHEN YOU DON'T COME ACROSS ANY PROBLEMS - YOU CAN BE SURE THAT YOU ARE TRAVELLING IN A WRONG PATH

Re: Conversion from long to CString?

VCProgrammer2-Dec-08 0:00

VCProgrammer

2-Dec-08 0:00

str.Format("%ld",num);

Re: Conversion from long to CString?

Jijo.Raj2-Dec-08 0:43

Jijo.Raj

2-Dec-08 0:43

You could use itoa()[^] as well.

Regards,
Jijo.

_____________________________________________________

http://weseetips.com[^] Visual C++ tips and tricks. Updated daily.

Re: Conversion from long to CString?

J. Landsheer2-Dec-08 3:42

J. Landsheer

2-Dec-08 3:42

Your solution should work in environments where an 'int' is 4-bytes (=equivalent to 'long').

str.Format("%ld",num);<br />

should work everywhere (the 'l'-prefix indicates that 'num' is a long decimal).

Re: Conversion from long to CString?

Le@rner2-Dec-08 17:19

Le@rner

2-Dec-08 17:19

So please tell me what can i use that is use everywhere.

IN A DAY, WHEN YOU DON'T COME ACROSS ANY PROBLEMS - YOU CAN BE SURE THAT YOU ARE TRAVELLING IN A WRONG PATH

how to read mozila firefox cookies

YaronNir1-Dec-08 23:06

YaronNir

1-Dec-08 23:06

Hi all,

i've notice that InternetGetCookie API doesn't work with firefox...
firefox store the cookie differently and even under different location

can any1 help me on how to read values from firefox cookies?

thanks in advanced
Yaron

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http://www.codeproject.com/com/COMBasics.asp

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Getting Property Sheet Handle

koumodaki1-Dec-08 22:27

koumodaki

1-Dec-08 22:27

I have created Property Sheet and Pages using Win32 SDK. Now I need to modify a edit box on a Page. The piece of code is

HWND hPropSheet = GetActiveWindow();
HWND hPropPage0=PropSheet_GetCurrentPageHwnd(hDlg);
SetDlgItemText(hPropPage0,IDC_EDIT1,(LPCWSTR)szBuffer);

Is this correct? I am not able to get the Handle to window to the Property Sheet ..... Please help Confused | :confused:

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