C / C++ / MFC Discussion Boards

How to save captured screen as jpg/jpeg file?

edvintas6-Nov-06 8:02

6-Nov-06 8:02

hello,
please don't say "use GDI, use GDI blah blah..." i didn't found nothing about how to do it directly(without saving bmp first)
is it possible to use Image::Save method? how to convert captured screen to IStream? D'Oh! | :doh:

thank you very much for help Rose | [Rose]

Re: How to save captured screen as jpg/jpeg file?

Mark Salsbery6-Nov-06 8:12

Mark Salsbery

6-Nov-06 8:12

edvintas wrote:
is it possible to use Image::Save method?

The Image class is GDI+ right? Unless you are using the .NET framework.

Since you don't want to "use GDI blah blah..." then I'd have to answer "No".

Re: How to save captured screen as jpg/jpeg file?

edvintas6-Nov-06 9:03

edvintas

6-Nov-06 9:03

yes, that image class is GDI+, but you missunderstood me, i want use GDI+ i just didn't found useful example how to do it... Sniff | :^)

i just said taht because i found some posts about bmp >> jpg but the answer was: "Use GDI+"
and nothing more, so i didn't want such answer as i already tried to use it and not successful so i need a bit help Smile | :)

Re: How to save captured screen as jpg/jpeg file?

Mark Salsbery6-Nov-06 10:42

Mark Salsbery

6-Nov-06 10:42

Something like this maybe...

#include <gdiplus.hᡊe9ac73-238b-46be-991d-0f050c37248d   ...
// get a screen DC
HDC hScreenDC = GetDC(NULL);

// Create a Bitmap object - dimensions of screen (assumed 1 monitor)
int ScreenSizeX = GetDeviceCaps(hScreenDC, HORZRES);
int ScreenSizeY = GetDeviceCaps(hScreenDC, VERTRES);
Bitmap bitmap(ScreenSizeX, ScreenSizeY, PixelFormat24bppRGB);

// Create a Graphics object associated with the Bitmap
Graphics graphics(&bitmap);

// Draw the screen pixels on the Graphics object
HDC hGraphicsDC = graphics.GetHDC();
BitBlt(hGraphicsDC, 0, 0, ScreenSizeX, ScreenSizeY, hScreenDC, 0, 0, SRCCOPY);
graphics.ReleaseHDC(hGraphicsDC);

// Save as JPEG (GetEncoderClsid() code is in GDI+ SDK - see Image::Save())
CLSID JPGClsid;
GetEncoderClsid(L"image/jpeg", &JPGClsid);
bitmap.Save(L"MyScreenSnapshot.jpg", &JPGClsid, NULL);

Re: How to save captured screen as jpg/jpeg file?

Hamid_RT6-Nov-06 20:57

Hamid_RT

6-Nov-06 20:57

Is CImage::Save helpfuls?

WhiteSky

CombineRegion()

Waldermort6-Nov-06 7:33

Waldermort

6-Nov-06 7:33

Does anybody know how to quickly invert a region using the CombineRegion() or similar api? I have so many regions to add, subtract and manipulate I cannot determine If any of my attempts are working.

Regular expression!!!

_AnsHUMAN_ 6-Nov-06 6:34

_AnsHUMAN_

6-Nov-06 6:34

HI All,
I have a string. In this string I want to validate that if and only if the previous character is something then the next character should also follow a definite pattern.
For ex:
A_____B______C_____D_____E
3_____1______2_____0_____3
_____________4_____0_____1
___________________1_____2
______2______1_____1_____0
______4______2_____3_____2
so as explained in the table above the valid entries should be 31203,31412,32110,34232.
I have tried solving the issue with a lots of if's, else if's etc. but I somewhere feel that this may not be the right way to validate the input. Can somebody put some light on this issue or point me to some article link that may help me to the resolution of the problem.....
Thanks in advance

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: Regular expression!!!

toxcct6-Nov-06 6:46

toxcct

6-Nov-06 6:46

something like this ?? Roll eyes | :rolleyes:

(3 [1 [(2 0 3) | (4 [(0 1) | (1 2)])] | (2 1 1 0) | (4 2 3 2)])

You don't know where to start ? ask a good friend

[VisualCalc 3.0][Flags Beginner's Guide]

Re: Regular expression!!!

David Crow6-Nov-06 7:42

David Crow

6-Nov-06 7:42

Could you possibly employ the use of a FSM?

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Re: Regular expression!!!

C^hris L^osinger6-Nov-06 8:49

C^hris L^osinger

6-Nov-06 8:49

DavidCrow wrote:
Could you possibly employ the use of a FSM

there is only one FSM. and he works for nobody.

image processing | blogging

Re: Regular expression!!!

kakan6-Nov-06 19:21

kakan

6-Nov-06 19:21

_AnShUmAn_ wrote:
A_____B______C_____D_____E
3_____1______2_____0_____3
_____________4_____0_____1
___________________1_____2
______2______1_____1_____0
______4______2_____3_____2
so as explained in the table above the valid entries should be 31203,31412,32110,34232.

I'm missing one value. I guess the correct entries should be 31203,31401,31412,32110,34232. Am I right?

Further:
1.
The underscore characters, are they present in the string?

2.

_AnShUmAn_ wrote:
A_____B______C_____D_____E

Does this line have any significance, or did you just put it there for clarification?

Alcohol. The cause of, and the solution to, all of life's problems - Homer Simpson

Re: Regular expression!!!

_AnsHUMAN_ 6-Nov-06 19:32

_AnsHUMAN_

6-Nov-06 19:32

kakan wrote:
I'm missing one value

I just gave a few examples about how the values could be entered by the user. Yes what you is correct.

kakan wrote:
The underscore characters, are they present in the string?

NO the underscore signs are not present in the string. I just entered them to show the alignment to the codeproject member's.

kakan wrote:
A_____B______C_____D_____E

I just put this line for clarification.

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: Regular expression!!! [modified]

kakan6-Nov-06 19:38

kakan

6-Nov-06 19:38

OK, one more question:
The "shorter" lines, are they left justified, or are they padded with blanks?
<code>
Like this (padded with blanks):
"31203"
" 401"
" 12"
" 2110"
" 4232"

Or like this (left justified):
"31203"
"401"
"12"
"2110"
"4232"
</code>

I'm working on a solution.

-- modified at 1:43 Tuesday 7th November, 2006

-- modified at 1:44 Tuesday 7th November, 2006

Alcohol. The cause of, and the solution to, all of life's problems - Homer Simpson

Re: Regular expression!!!

kakan6-Nov-06 20:28

kakan

6-Nov-06 20:28

Hello again. I didn't receive an answer to my last question, but I made a solution that covers both cases.

You will have to adjust the code for Unicode if you want it.
And possibly adjust the code to ATL/STL if you want it.

Here goes:
The func:
<code>
void get(CString csIn, CString &csOut)
{
static CString csLast = "";
int lastLen = csLast.GetLength();

// Ignore and remove leading blanks in csIn.
while(csIn.GetAt(0) == ' ') csIn.Delete(0);
int inLen = csIn.GetLength();

if(inLen >= lastLen) {
// New, bigger value, save it.
csLast = csIn;
lastLen = csLast.GetLength();
}

int copyChars = lastLen - inLen;
if(copyChars > 0) {
csOut = csLast.Left(copyChars);
}
else csOut = "";

csOut += csIn;
csLast = csOut; // Save the last value for next time.
}
</code>

The main:
<code>
CString csRet;

get("31203", csRet); // csRet becomes "31203"
get(" 401", csRet); // csRet becomes "31401"
get(" 12", csRet); // csRet becomes "31412"
get(" 2110", csRet); // csRet becomes "32110"
get(" 4232", csRet); // csRet becomes "34232"

</code>

Alcohol. The cause of, and the solution to, all of life's problems - Homer Simpson

Re: Regular expression!!!

_AnsHUMAN_ 6-Nov-06 21:08

_AnsHUMAN_

6-Nov-06 21:08

Thanks for your time and effort both in helping me to find out the solution. I will give it a try and let you know if there is still some problem that needs to be dealt with.
Thanks once again.

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: Regular expression!!!

kakan6-Nov-06 21:12

kakan

6-Nov-06 21:12

Your'e welcome, I'm glad if I can be of assistance to you.
And I can't resist a challenge...

Probably, there are things that must be fixed, this is a quick hack.
But I think the main idea works.

Good luck.
Kakan

Alcohol. The cause of, and the solution to, all of life's problems - Homer Simpson

Re: Regular expression!!!

David Crow7-Nov-06 2:52

David Crow

7-Nov-06 2:52

kakan wrote:
// Ignore and remove leading blanks in csIn.
while(csIn.GetAt(0) == ' ') csIn.Delete(0);

What's wrong with CString::TrimLeft()?

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Re: Regular expression!!!

kakan7-Nov-06 2:56

kakan

7-Nov-06 2:56

There is nothing wrong with TrimLeft (i hope).
I agree, it's a better choice. But I didn't have the time to tidy up the code. I'm at work, and wanted to help out...

Alcohol. The cause of, and the solution to, all of life's problems - Homer Simpson

Extract information from a List class (Win32 API question)

Leprechaun786-Nov-06 6:03

Leprechaun78

6-Nov-06 6:03

Hi all,

I am currently involved in a migration project from one reporting tool to another. The tool I am migrating reports from displays a large number of items in a window similar to a list box with no option to cut and paste so I currently have to copy them by hand and type them back into the new reporting tool.

The reporting tool API does not have an object that will allow me to access the information so I was wondering if I could get Windows to output the items to a text file as it was displaying them on the screen.

I downloaded the WindowDump utility from

http://msdn.microsoft.com/msdnmag/issues/02/08/EscapefromDLLHell/

in the hope that it would extract the information for me but unfortunately it indicated that the window I was looking at was not the ListBox class but a List class, which I'm assuming is a custom class with no associated Windows functions that will allow me to retrieve information from it.

I then attempted to use windows subclassing to intercept the messages from the List class but discovered that SetWindowLong could not be used on a window outside the application using it.

Can anyone tell me if what I want to do is possible and give me some direction on how to pursue my investigation from here?

Many thanks,
Lep

Re: Extract information from a List class (Win32 API question)

David Crow6-Nov-06 7:38

David Crow

6-Nov-06 7:38

Leprechaun78 wrote:
...a window similar to a list box...

Does it respond to listbox messages?

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Re: Extract information from a List class (Win32 API question)

Leprechaun786-Nov-06 23:22

Leprechaun78

6-Nov-06 23:22

Nope, the WindowDump utility extracts information from the ListBox class. It didn't retrieve the information from this Window, but it provided the class (List), handle, process, styles etc.

Re: Extract information from a List class (Win32 API question)

David Crow7-Nov-06 2:49

David Crow

7-Nov-06 2:49

Leprechaun78 wrote:
...the ListBox class.

Where is this class defined? How would WindowDump even know that an application was usng such a class, let alone have access to it?

Leprechaun78 wrote:
...the class (List), handle, process, styles etc.

I've not heard of a class having a handle and a style. These sound like window properties.

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Re: Extract information from a List class (Win32 API question)

Leprechaun787-Nov-06 3:55

Leprechaun78

7-Nov-06 3:55

My terminology is probably incorrect, I don't have a lot of experience of programming in Windows (or anything else!), apologies for that. I thought a window was an instance of a class?

WindowDump uses GetClassName to extract the class name. This is an example of the output:

Class: List
Title:
ID: 0
hWnd: 0x00010d9a
Styles: WS_CHILD
Control Styles:
Dimension: (208,329) 95 x 125
State: Visible Enabled

If the class was a list box WindowDump would retrieve the contents using

SendMessage(hWnd, LB_GETTEXT, iPos, (LPARAM)szLine)

I'm wondering if there is a similar way to access the contents of a custom class?

Re: Extract information from a List class (Win32 API question)

David Crow7-Nov-06 4:03

David Crow

7-Nov-06 4:03

Leprechaun78 wrote:
My terminology is probably incorrect...

It sounds as though you are confusing a Windows class (e.g., BUTTON, EDIT, LISTBOX, STATIC, COMBOBOX) with a C++ class.

Leprechaun78 wrote:
I'm wondering if there is a similar way to access the contents of a custom class?

Yes, but the target control would need to respond to the message for you to get anything from it.

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Re: Extract information from a List class (Win32 API question)

Leprechaun788-Nov-06 2:16

Leprechaun78

8-Nov-06 2:16

Ok, I'll investigate ways of checking the properties of a C++ class. My thinking is that the application is passing the information to the operating system for it to display, so I want the operating system to output that information somewhere other than the screen (i.e. a text file). Do you think this is possible?

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.