C / C++ / MFC

1-Aug-08 2:44

If in a Visual C++ 2008 I have an image which i set up by BITMAPFILEHEADER and BITMAPINFO and BITMAPINFOHEADER, how can I enclose it in a device-context so that graphics functions can draw lines and write text on it, as if it was a screen?

Currently the MSDN Library http://msdn.microsoft.com/en-us/library/default.aspx is 404 or not answering queries, else I would have looked in it. When is there the least load on the MSDN Library?

KarstenK1-Aug-08 3:10

KarstenK

1-Aug-08 3:10

Look for the Cbitmap and CDC classes, where you can make an output.

Greetings from Germany

David Crow1-Aug-08 3:47

David Crow

1-Aug-08 3:47

Do you mean something like this?

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

OT- Nice article.

CPallini1-Aug-08 8:26

1-Aug-08 8:26

Cannot understand why is heavily attacked by the trolls.
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.

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

[Image resize DLL]

Anthony Appleyard1-Aug-08 9:41

1-Aug-08 9:41

To DavidCrow: thanks, but in my case the image that I want to write to is already in memory as BITMAPINFO etc bit patterns (without an HBITMAP hande), and does not need to be read from a file.

Mark Salsbery1-Aug-08 10:29

Mark Salsbery

1-Aug-08 10:29

Load it in (or create it) as a DIBsection instead -
then you'll have an HBITMAP to use like David's code shows.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Anthony Appleyard1-Aug-08 12:11

1-Aug-08 12:11

That is, please, I want somehow to set up in RAM memory an image object which I can write text to by TextOut() etc via a Device Context (HDC) and also directly by reading and writing its internal data layout.

Mark Salsbery1-Aug-08 12:49

Mark Salsbery

1-Aug-08 12:49

Unless you render the text pixels yourself directly to the
bitmap bits in memory (or use a library that does it for you),
you're going to need to obtain an HBITMAP for the bitmap.

With GDI, a DIBSection works great, and pretty much matches your
current data perfectly.

With GDI+, which has better text capabilities, a Bitmap object is easy
to create from Windows DIB (bmp) data. GDI+ can do this stuff with only
a few lines of code.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Anthony Appleyard1-Aug-08 19:10

1-Aug-08 19:10

I have a program with a set of C++ functions which I wrote to handle image bitmaps directly.

I have been developing this program since around year 1999, and to develop it for a long time I used a good old faithful Borland 5.1 C++ compiler, until I needed a new computer, which came with Windows Vista, which proved incompatible with many old programs and software, and so I had to change to Visual C++.

There is an old (Borland C++) version of this program, including source text, in http://www.buckrogers.demon.co.uk/software/ppp.zip .

It does not use classes (except some classes that I wrote), but calls the Windows graphics functions directly.

But please now I want to be able to write text to those images. So I need some way to set up an image which all of:-
* Has an HDC device-context handle and so can be written to by TextOut() etc.
* Can be written to or from by BitBlt().
* I can access its component bit patterns directly.

Re: LAUNCHING Application

Mark Salsbery2-Aug-08 6:20

Mark Salsbery

2-Aug-08 6:20

Anthony Appleyard wrote:
But please now I want to be able to write text to those images. So I need some way to set up an image which all of:-
* Has an HDC device-context handle and so can be written to by TextOut() etc.
* Can be written to or from by BitBlt().
* I can access its component bit patterns directly.

Besides the fact that a bitmap doesn't "have" an HDC (a bitmap can
be selected into a DC), a DIBsection fits your requirements exactly.

CreateDIBSection[^]

You say you've got the BITMAPINFO and bitmap bits in memory.
Given a BITMAPINFO *bmi and a void *bmbits, the following code will
create a DIBSection - a bitmap that you can select into a DC and also read/write
its pixel bits directly:

BITMAPINFO *bmi = ...;
void *bmbits = ...;

BYTE *pDIBSectionBits;
HBITMAP hBitmap = ::CreateDIBSection(NULL, bmi, DIB_RGB_COLORS, (void**)&pDIBSectionBits, NULL, 0);

if (hBitmap)
{
    // Copy source bitmap pixel bits to the new DIBsection
    LONG lStride = (((bmi->bmiHeader.biWidth * (long)bmi->bmiHeader.biBitCount + 31L) & (~31L)) / 8L);
    memcpy(pDIBSectionBits, bmbits, lStride * abs(bmi->bmiHeader.biHeight));

    // do something with the DIBSection

    ::DeleteObject(hBitmap);
}

Pretty simple Smile | :)

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Database support

Member 4431371-Aug-08 1:15

Member 443137

1-Aug-08 1:15

Hi,

I have a SDI formview based application and I want to store some results into MS-Access or such database. I am presently working on VC++ 6.0. Can any one suggest me that whether this can be done in VC++ using ODBC. Any lead is highly appreciated.

Thank you.

Shanmukha.

Re: Database support

Rajesh R Subramanian1-Aug-08 1:26

Rajesh R Subramanian

1-Aug-08 1:26

Hi 443137,

Please check the Database section. There are several articles that might be of use to you (including ODBC).

Linkz: http://www.codeproject.com/KB/database[^]

Please leave us our small pleasures, they are small, but they are ours! - Mycroft Holmes ^

.·´¯`·->Rajesh<-·´¯`·.
[Microsoft MVP - Visual C++]

Re: Database support

Varghese Paul M1-Aug-08 1:32

Varghese Paul M

1-Aug-08 1:32

If you are trying with MS-Access, then you can use classes CDaoDatabase, CDaoRecordset from the MFC framework. If you are interested only in ODBC, then you can try classes CDatabase, CRecordset again from MFC framwork.

Re: Database support

Le@rner1-Aug-08 18:30

Le@rner

1-Aug-08 18:30

If u r interested in ODBC,there is two way of connection.

1. Tru coding::for example

			CString avc;
			CString abb ;
CString tempstr ;//path of database
			abb="\"";
			avc ="odbcconf.exe /a {CONFIGSYSDSN """ + abb+ """Microsoft Access Driver (*.mdb)""" +abb+ " " + abb + abb+ """DSN=Restore;DBQ="""+ abb + tempstr + abb + ";""" + abb+ abb + " Description=PRI_SD_ODBC}""";
				
			int length=avc.GetLength();	
			CFile file;
			CFileException e;
			file.Open(_T("C:\\boot.bat"),CFile::modeCreate|CFile::modeWrite,&e);
			file.Write(avc,length);		
			file.Close();
			ShellExecute(NULL,_T("open"),_T("C:\\boot.bat"),NULL, NULL, SW_HIDE);

2.
you goto control panel there is ODBC data source admininstrator.
there are two option create whether user DSN or System DSN.

Select anyone and click ADD.

open a window for create new data souce.Select Microsoft Access Driver(*.mdb).click on finish.

ODBC microsoft setup window open.

fil entry like DSN name, database path

then click ok.

connection is estabilsh.

You can chk you DSN name in User DSN or System DSN window whter u selected .

now in your code you go to in class view and add class and select MFC ODBC Consumer,click on DatSOurce and select ur created DSN.

Than select a table for which you cant to create class and than use.

ok.

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

LAUNCHING Application

paul crescent31-Jul-08 23:58

paul crescent

31-Jul-08 23:58

Hi

i need a logic for given issue that i have a interface of third party application in my application (mfc application), using this interface , i launch the third party applicaiton. my problem is that when my appliction exit, the third party applicaiton also is forced to close. Is any alernative this. Smile | :)

by

paul

CPallini1-Aug-08 0:00

Re: LAUNCHING Application

1-Aug-08 0:00

paul crescent wrote:
using this interface

Probably you should read interface documentation (if any).
Smile | :)

ThatsAlok1-Aug-08 0:47

ThatsAlok

1-Aug-08 0:47

create a new process of that application

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
Never mind - my own stupidity is the source of every "problem" - Mixture

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You/xml>

Re: LAUNCHING Application

Iain Clarke, Warrior Programmer1-Aug-08 3:18

Iain Clarke, Warrior Programmer

1-Aug-08 3:18

The devil is in the details for this sort of thing.

My main app can sometimes use another company's app to do some work. They provide a COM library to communicate with their app. In a similar way to yours, if my app closes, their COM library closes, and in tidying up shuts down the external app. I'm not complaining - this is a good thing for me.

But I can see it being a pain.

Do you have some need for controlling this external app? If not, just use CreateProcess / ShellExecute when your app runs, and let the external app do it's own thing.

Would your app closing have some bad effect on external app?

As I said at the beginning, the devil is in the details. You have to sweat the small stuff.

cliché:off.

Iain.

Buffer Copy / Concat Issue [modified]

Programm3r31-Jul-08 22:57

Programm3r

31-Jul-08 22:57

Hi all,

I'm trying to build up an SQL statement within a buffer. I am doing the following:

sprintf(sqlBuf,
"INSERT INTO %s.%s ( <Fields> ) VALUES ('%s', '%s','",					
<value>, <value>, <value>, <value> );

So far straight foward... Then I receive a MINUTIA buffer from a Sagem Reader, the first couple of charaters a null and some in not, the MINUTIA buffer has a size of 512.

Now I want to add it to sqlBuf and further more add some other field values that are required after the MINUTIA field.

Can any one please help???

The only programmers that are better that C programmers are those who code in 1's and 0's Green Alien | [Alien]

Programm3r
My Blog: ^_^

modified on Friday, August 1, 2008 5:04 AM

CPallini31-Jul-08 23:04

31-Jul-08 23:04

Programm3r wrote:
Then I receive a MINUTIA buffer from a Sagem Reader, the first couple of charaters a null and some in not, the MINUTIA buffer has a size of 512

Well I'm far from being an expert, but I suppose that such buffer contains raw data and you probably should not use strings to store it inside the database.
Smile | :)

Programm3r31-Jul-08 23:06

Programm3r

31-Jul-08 23:06

I'm not using strings in the database I'm using a blob.....

The only programmers that are better that C programmers are those who code in 1's and 0's Green Alien | [Alien]

Programm3r
My Blog: ^_^

CPallini31-Jul-08 23:18

31-Jul-08 23:18

Hence what is your trouble about? Does this [^] help?
Smile | :)

Perspx31-Jul-08 23:17

Perspx

31-Jul-08 23:17

Can you not use strcat()?

Regards,
--Perspx

"The Blue Screen of Death, also known as The Blue Screen of Doom, the "Blue Screen of Fun", "Phatul Exception: The WRECKening" and "Windows Vista", is a multi award-winning game first developed in 1995 by Microsoft" - Uncyclopedia