Re: CMYK values - C / C++ / MFC Discussion Boards

AnayKulkarni29-Jun-09 21:07

29-Jun-09 21:07

Hello to all,
can anyone provide me the different IOCTL codes for FTDI driver. I am using FT232BM chip and want IOCTL codes of FTDI driver to change lattency time of the driver.It is really very urgent so plz help me out.

Thanks and Regards,

Anay

Re: IOCTL codes

Cedric Moonen29-Jun-09 22:21

Cedric Moonen

29-Jun-09 22:21

Don't you have some kind of documentation which was supplied with the chip ? I'm afraid those codes are specific to the manufacturer so, unless somebody already worked with this chip, nobody here will be able to help you...

Cédric Moonen
Software developer

Charting control [v2.0]
OpenGL game tutorial in C++

Re: IOCTL codes

Roger Stoltz30-Jun-09 1:25

Roger Stoltz

30-Jun-09 1:25

As Cédric already mentioned above and I mentioned here[^], you should consult the vendor, or FTDI in this case, and the documentation they provide.

Iain Clarke suggested nearly half a year ago here[^] that you should use the D2XX solution since it is easier to use. The API of the DLL documented in this PDF[^] also contains a function called FT_SetLatencyTimer() and I think it would reasonable to assume that the function does set the latency timer...

I guess I must have misunderstood something because all I did was to Google for "FTDI" and the first hit was the home page of FTDI where I found this, to my understanding, useful information. Unsure | :~

"It's supposed to be hard, otherwise anybody could do it!" - selfquote
"High speed never compensates for wrong direction!" - unknown

CMYK values

S p k 52129-Jun-09 20:56

S p k 521

29-Jun-09 20:56

Hi All,

Please help me in this issue...
///using vc++///

I want to get the C M Y K values from a tiff file. I already getting the RGB values using Image class(gdi +).. Please share your ideas..

Regards,
Spk

Re: CMYK values

Nuri Ismail29-Jun-09 21:19

Nuri Ismail

29-Jun-09 21:19

You don't need to get the CMYK values directly from the TIFF file if you already have the RGB values, because the RGB values can be converted to CMYK values. You can find an information for this conversion here[^].

Nuri

Re: CMYK values

S p k 52129-Jun-09 21:57

S p k 521

29-Jun-09 21:57

Thanks a lot Nuri...

Re: CMYK values

Nuri Ismail29-Jun-09 22:04

Nuri Ismail

29-Jun-09 22:04

No problem man! Cheers! Smile | :)

Re: CMYK values

C^hris L^osinger30-Jun-09 10:24

C^hris L^osinger

30-Jun-09 10:24

CMYK colors are device-specific. doing the simple RGB->CMYK conversion (as linked in the reply above) is an approximation to CMYK, but not a very good one. it will be OK for some images, but total crap for many.

if you want to convert RGB to CMYK with any kind of accuracy and consistency, you need to know two things: the color profile of the device that created the RGB image and the color profile of the device that will render the image. then you can use a CMS (Color Management System) to convert between the two.

MSDN[^]

i've had good luck with little CMS[^]

image processing toolkits | batch image processing

Re: CMYK values

Nuri Ismail30-Jun-09 20:42

Nuri Ismail

30-Jun-09 20:42

Thank you for this useful information Chris!
In the past i've been done some RBG->CMYK conversions and everything was OK.
But now I understand that this was an approximation and I was a lucky man.
Thanks again! Thumbs Up | :thumbsup:

Nuri

Re: CMYK values

Alan Balkany1-Jul-09 4:14

Alan Balkany

1-Jul-09 4:14

It seems like Microsoft's image functions will read a CMYK file, but it's immediately converted to RGB. Aurigma.com makes class libraries that will read CMYK images as CMYK, without conversion. Their class libraries also provide image processing and conversion.

Debug Assertion

Davitor29-Jun-09 20:42

Davitor

29-Jun-09 20:42

Hi All

I am geting debug assertion failed Line 3232 in file dbcore.cpp.Code is here

Database database; 
	try
	{
		if(database.OpenEx(_T("Driver={MySQL ODBC 5.1 Driver};Server=localhost;Database=;User=root; Password=root;Option=3;"), CDatabase::noOdbcDialog))   
		{	        
			AfxMessageBox("Connection Successfully");

			CString szSql = "SHOW DATABASES";

CRecordset rs(&database);
rs.Open( CRecordset::forwardOnly, szSql);
			
while (!rs.IsEOF())
{
  CString szBuf;
				
  rs.GetFieldValue("DATABASE", szBuf);

  rs.MoveNext();
}

rs.Close();

		}
	}
	catch(CException *e)
	{
	AfxMessageBox("Connection Failed");	
	}

i am geting assertion in this line

rs.Open( CRecordset::forwardOnly, szSql);
Debug assertion failed Line  3232 in file dbcore.cpp.

I see line 3232 in dbcore.cpp file.There i found this syntax

ASSERT(m_nFields != 0);

Can any one tell how can i solve that debug assertion.
Plz help me

Re: Debug Assertion

Madhu Nair29-Jun-09 20:59

Madhu Nair

29-Jun-09 20:59

Use CDBException to catch the error in your database code

Re: Debug Assertion

Davitor29-Jun-09 21:12

Davitor

29-Jun-09 21:12

Thanks for reply.
I use CDBException class for catch the error.But it's showing same Assertion.

Re: Debug Assertion

«_Superman_»29-Jun-09 21:07

«_Superman_»

29-Jun-09 21:07

Your query didn't have any output fields.
Probably something wrong with the query.

«_Superman_»
I love work. It gives me something to do between weekends.

Re: Debug Assertion

Davitor29-Jun-09 21:14

Davitor

29-Jun-09 21:14

Ok but same query i have check in mysql,then it's working fine.If you have any more query then plz give me.

Re: Debug Assertion

CPallini29-Jun-09 21:37

CPallini

29-Jun-09 21:37

See if this [^] helps.
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

[My articles]

Re: Debug Assertion

Davitor29-Jun-09 21:51

Davitor

29-Jun-09 21:51

Hi CPallini

Thanks for reply.may i know where is concept of my question in your post?Plz help me

Re: Debug Assertion

CPallini29-Jun-09 21:56

CPallini

29-Jun-09 21:56

It looks like you've to change the flag "Ignore # in table name" in your ODBC driver in order to make the statement 'SHOW DATABASES' work.
Smile | :)

Re: Debug Assertion

Davitor29-Jun-09 22:08

Davitor

29-Jun-09 22:08

So i change

CString szSql = "SHOW DATABASES"; to this
szSql = "SHOW DATABASES from mysql",

rs.Open( CRecordset::forwardOnly, szSql); to this
rs.Open( _T("Driver={MySQL ODBC 5.1 Driver};Server=localhost;Database=;User=root; Password=root;Option=3;"),szSql,CRecordset::forwardOnly);

Both are givesame debug assertion.
Plz help me

Re: Debug Assertion

Stuart Dootson29-Jun-09 22:32

Stuart Dootson

29-Jun-09 22:32

Ummmmm - "SHOW DATABASES" isn't SQL? It IS a MySQL command - but that doesn't necessarily make it something you can execute using ODBC?

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: Debug Assertion

Davitor29-Jun-09 23:05

Davitor

29-Jun-09 23:05

yaa i know "SHOW DATABASE" is Mysql command and i am useing for MySql.Can you tell how and which command is execute for SHOW DATABASE useing ODBC?
Plz help me

Re: Debug Assertion

CPallini29-Jun-09 23:34

CPallini

29-Jun-09 23:34

You may try 'SHOW SCHEMA', it looks like more 'SQL standard'.
Smile | :)

Re: Debug Assertion [modified]

Stuart Dootson30-Jun-09 2:27

Stuart Dootson

30-Jun-09 2:27

Don't think you can use CRecordset - I don't think it lets you execute arbitrary commands.

You could use CDatabase::ExecuteSQL - but that doesn't return any results.

You can use ODBC to execute that command - here's how you'd do it in Python

import dbi
import odbc
conn = odbc.odbc("Driver={MySQL ODBC 5.1 Driver}; Server=localhost; Database=; User=root; Password=password; Option=3;")
curs = conn.cursor()
curs.execute("SHOW DATABASES")
curs.fetchall()

results in something like this

[('information_schema',), ('mysql',), ('test',)]

Here's how you could do it in C++ with ADO:

#import "libid:2A75196C-D9EB-4129-B803-931327F72D5C" rename("EOF", "adoEOF")

int main()
{
   CoInitialize(0);
   ADODB::_ConnectionPtr conn(__uuidof(ADODB::Connection));
   conn->Open(_bstr_t("Driver={MySQL ODBC 5.1 Driver}; Server=localhost; Database=; User=root; Password=password; Option=3;"), "", "", 0);
   ADODB::_RecordsetPtr rs = conn->Execute(_bstr_t("SHOW DATABASES"), 0, ADODB::adCmdText);

   _variant_t databaseNames = rs->GetRows(ADODB::adGetRowsRest);
}

databaseNames is a SAFEARRAY containing BSTR elements, one for each database name.

Last modified: 3hrs 14mins after originally posted --

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: Debug Assertion

Davitor30-Jun-09 20:53

Davitor

30-Jun-09 20:53

Thanks

Re: Debug Assertion

Davitor8-Jul-09 18:16

Davitor

8-Jul-09 18:16

Hi Stuart Dootson
This things is working fine.But i need to use "Select * from Tablename".Show how can i get full information of table in

_variant_t.

Plz help me

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