RGB data - C / C++ / MFC Discussion Boards

Re: using _ecvt or f_fcvt???

Gérald Mercet22-Oct-01 6:00

Gérald Mercet

22-Oct-01 6:00

you were right, thanks for your help

gerald

Find File including Subdirectories..

Bernhard22-Oct-01 4:07

Bernhard

22-Oct-01 4:07

... i have got a directory with many subdirs.. in most of them there is a foo.cfg file.. i would like to open now all these files..
is there any chance for me and not iterating through all the dir's with find_file???

thanks in advance

bernhard

"Politicians and diapers have one thing in common. They should both be changed regularly and for the same reason."

Re: Find File including Subdirectories..

Carlos Antollini22-Oct-01 4:17

Carlos Antollini

22-Oct-01 4:17

You have the attribute that inform you if the file is a directory. I don't know if you are working with MFC, but when you find a directory and if it is not dot, you need to use the find file into the directory, each time that you find a directory you need to find into it...

Good luck...;)

Carlos Antollini.

Re: Find File including Subdirectories..

Ray Kinsella22-Oct-01 4:17

Ray Kinsella

22-Oct-01 4:17

write a recursive function using CFindFile

FindFile(String strDirectory)
{

OPEN FILE_FIND(strDirectory)

FOR EACH file IN FILE_FIND

IF IS_DIRECTORY(file) THEN

FindFile(file)

ELSE

// do something else

END IF

NEXT file

CLOSE FILE_FIND

}

Regards

Ray

"Je Suis Mort De Rire"

THANKS

Bernhard22-Oct-01 4:53

Bernhard

22-Oct-01 4:53

thanks for the prompt answer...

bernhard

"Politicians and diapers have one thing in common. They should both be changed regularly and for the same reason."

CListCtrl different text colors for one item

stephan22-Oct-01 3:40

stephan

22-Oct-01 3:40

Can anybody help me?

I want to set 2 different text colors in one item.
Is this possible and how can i do that?

Re: CListCtrl different text colors for one item

Michael Dunn22-Oct-01 4:51

Michael Dunn

22-Oct-01 4:51

You'll need to draw the item yourself, changing the text color with SetTextColor() before you draw the word you want colored differently.

--Mike--
http://home.inreach.com/mdunn/
"....." -- Silent Bob
Heart | [heart]

your

with

and

RGB data

22-Oct-01 3:40

Please, show me mistakes.
This code save array of pixels into txt file as RGB (0...255) for every pixel.
Code perfect works for 24 and 32 bitmaps, but it doesn't work for 8 & 16 bitmaps.

No, it works for 8,16, but save wrong array of pixel
What's the problem, i cann't find
If you know, please, help me

void CMainWnd::SaveAsArray(LPCTSTR filename)
{
int BytesPerPixel = (lpBitmap->biSizeImage)
/(lpBitmap->biHeight * lpBitmap->biWidth);

int WidthBytes = lpBitmap->biWidth * BytesPerPixel;

int size = sizeof(BITMAPINFOHEADER)
+ sizeof(RGBQUAD) * lpBitmap->biClrUsed;

BYTE *Bits = (LPBYTE)lpBitmap
+ size;

BYTE * ScanLine;
BYTE * Data;
BYTE Red, Green, Blue;

CStdioFile skadr;
CString string;
skadr.Open(filename, CFile::modeCreate|CFile::modeWrite);

for( int y = lpBitmap->biHeight; y>0; --y )
{

ScanLine = Bits + (WidthBytes * (y - 1));
Data = ScanLine;

for( int x = 0; x<lpbitmap->biWidth - 1; ++x )
{
LPRGBQUAD Quad = (LPRGBQUAD) Data;

Blue = Quad->rgbBlue;
Green = Quad->rgbGreen;
Red = Quad->rgbRed;

BYTE color = (Red
+ Green
+ Blue)/3;

string.Format("\t %d", color);
skadr.WriteString(string);

Data += BytesPerPixel;
}

string.Format("\n" );
skadr.WriteString(string);

}

skadr.Close();

}

Re: RGB data

Christian Graus22-Oct-01 11:02

Christian Graus

22-Oct-01 11:02

16 bit bitmaps do not use a BYTE for each colour, they use 5 bits per colour and one spare. 8 bit bitmaps use a palette and one byte to store each colour, which is a lookup value into the palette.

Christian

As I learn the innermost secrets of the around me, they reward me in many ways to keep quiet.

Men with pierced ears are better prepared for marriage. They've experienced pain and bought Jewellery.

Re: RGB data

22-Oct-01 11:22

What can you advise?
What i need to change in my code to work with 8 and 16 bitmaps.
I don't know how to work with 8 and 16 bitmaps.
Thanks for your help!

Sergei

Re: RGB data

23-Oct-01 5:43

Does the structure, for example 8 bpp bitmap, goes thus:
Red;
data+=byte;
Green;
data+=byte;
Dark blue;
data+=byte;
// Miss of reserve
data+=byte;
If so, whence to take colours?
Willn't structure RGBQUAD help any more?
I.e. what analog will be to string:
Red = Quad->rgbRed?
There can be I are mistaken?
In what my error?

Modeless Dialogs and Minimize

Ray Kinsella22-Oct-01 1:42

Ray Kinsella

22-Oct-01 1:42

My app creates a modless dialog and enters the message loop etc. Why when I do a 'Minimize All Windows' on the Taskbar, does my application not minimize ...?

Regards

Ray

"Je Suis Mort De Rire"

Re: Modeless Dialogs and Minimize

Ray Kinsella22-Oct-01 5:23

Ray Kinsella

22-Oct-01 5:23

The Window needs the the style 'overlapped' doh!.

Regards

Ray

"Je Suis Mort De Rire"

Drawing Graphs

^GeeK^22-Oct-01 1:40

^GeeK^

22-Oct-01 1:40

well i just went through some of the codes available for graphical displays , however didnt find ne in which we can simply draw graph using the mouse .... and the then can easily get the respactive co-ordinates ....

need guidance on how to achieve this ... maybe some reference or sth ,....

Thanks in advance ... Smile | :)

Re: Drawing Graphs

Christian Graus22-Oct-01 11:06

Christian Graus

22-Oct-01 11:06

You want the mouse to actually plot the graph ? If so, look at my Doodle example for using the mouse to draw, it's easily converted to GDI if you don't need GDI+. To get the co-ordinates, I'd look at the filled shape code in that sample, it shows how you can build a path from the movement of the mouse, which I would think is the easiest way to get co-ordinates out at the end.

Christian

As I learn the innermost secrets of the around me, they reward me in many ways to keep quiet.

Men with pierced ears are better prepared for marriage. They've experienced pain and bought Jewellery.

MiniDump (as part of DBGHELP.DLL)

EiSl22-Oct-01 1:20

EiSl

22-Oct-01 1:20

Hello folks,

I'm currently working on my own Unhandled Exception Handler in order to provide me more information regarding the crash occurred and make a 'grateful' crash Wink | ;)

.

When checking the DGBHELP-library (MSDN) it also provides " User-mode Minidump Files" (crash dumps), that can be loaded within a debugger (like WinDBG).

Now my questions:
1. Very little info is provided in MSDN about these MiniDumps: what exactly do they dump and how to use it (is it usefull)?
2. MSDN states: "You can use this function on versions of Windows prior to Whistler without redistributing DbgHelp.dll. To do so, link with the static library MiniDump.lib, which is included in the Platform SDK."
No way I can find the Minidump.lib in the latest SDK, or more information about this. What about this library?

Any info about this MiniDump is highly appreciated!

Thanks,

EiSl

Which files of the ATL DLL project I need to provide

mimi22-Oct-01 0:07

mimi

22-Oct-01 0:07

Which files of the ATL DLL project I need to provide for Delphi except MyAtl.DLL ???

Because in client program in VC++ I need also :MyATL.h and MyATL_i.c.
What in another languages ?

Blush | :O

Re: Which files of the ATL DLL project I need to provide

Michael P Butler22-Oct-01 0:41

Michael P Butler

22-Oct-01 0:41

Delphi should just need the .DLL and .TLB files. Visual Basic is the same. As long as the DLL is registered on the system, you should be able to see your component in the Visual Basic References dialog.

Michael Smile | :)

Manny thanks, Michael !

mimi22-Oct-01 0:59

mimi

22-Oct-01 0:59

Simple STL Stream Problem

Derek Lakin21-Oct-01 23:35

Derek Lakin

21-Oct-01 23:35

I am trying to stream some text into and then out of a text string using STL. The following lines of code indicate how this is being done at the moment:

struct MyStruct {
  string el1;
  string el2;
};
// ...
// Output to the stream
string text;
char tab = 0x9;
MyStruct myStruct;
myStruct.el1 = "Some text";
myStruct.el2 = "Some more text";

// Create an output string stream
ostringstream output (text);

// Stream out the structure members using a tab as a separator
output << myStruct.el1 << tab << myStruct.el2;
text = output.str (); // Why do I have to do this bit?

// ...
// Fill the structure from the text
// Create an input string stream
istringstream input (text);

// Read in the text from the string stream into the structure
input >> myStruct.el1 >> myStruct.el2;

I have two questions. Firstly, am I doing the output part correctly? It seems bizarre that I should create an output string stream passing it a string and then have to assign the stream contents to the string Confused | :confused:

Secondly, how do I get the input part to read in the text ignoring whitespace until it finds the tab delimiter?

Derek Lakin.
Salamander Software Ltd.

Re: Simple STL Stream Problem

markkuk22-Oct-01 0:27

markkuk

22-Oct-01 0:27

You don't need to pass a string argument to the ostringstream constructor.

You can discard stuff from an istringstream just like from an ordinary istream, e.g.

input.ignore(numeric_limits<std_streamsize>::max(),'\t');

Re: Simple STL Stream Problem

Derek Lakin22-Oct-01 0:43

Derek Lakin

22-Oct-01 0:43

Thanks very much Smile | :)

I'll be back again if I need more help.

Derek Lakin.
Salamander Software Ltd.

More Help Needed Pls :(

Derek Lakin22-Oct-01 1:19

Derek Lakin

22-Oct-01 1:19

Unfortunately that doesn't seem to work.

Now it ignores the first bit of text up to the delimiter and then ignores the delimiters and uses space as a delimiter Confused | :confused:

The struct members are added with a tab to separate them. The struct members can (and do) contain spaces. The text must be read back into the struct such that all the text up to a tab is put into the specified struct member.

So, spaces are not delimiters, they are part of the text string. The tab is the delimiter between struct members.

Any more ideas?

Derek Lakin.
Salamander Software Ltd.

Re: More Help Needed Pls :(

markkuk22-Oct-01 20:14

markkuk

22-Oct-01 20:14

Sorry, I didn't read your first question carefully enough. If the struct is stored in a std::string, use std::string::find() to find the separator and then std::string::substr() to extract the struct member.

Re: More Help Needed Pls :(

Derek Lakin23-Oct-01 0:26

Derek Lakin

23-Oct-01 0:26

I was hoping this wasn't going to be necessary. Oh well, we live and learn.

I must admit I'm a bit miffed that it's really easy to write it to the stream, but bags of effort to read it back in again Frown | :(

Derek Lakin.
Salamander Software Ltd.

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