C / C++ / MFC Discussion Boards

Re: cannot display BMP when resolution is 0

John M. Drescher10-Jul-03 3:36

10-Jul-03 3:36

Satyaki wrote:
Sorry for the confusion I had created.
No problem...

What are you using to display the image?? Did you try http://www.codeproject.com/bitmap/cximage.asp?target=cximage[^]

John

Windows media format 9

Emiliano9-Jul-03 7:03

Emiliano

9-Jul-03 7:03

Hello all, I am trying to develop an application using the window media format 9, I have the sdk, but i am really struggling with it, Does any one know a good site that has sample nice simple or clear example that i could look over???

Thanks for any help that you might have..

Re: Windows media format 9

Led9-Jul-03 11:30

Led

9-Jul-03 11:30

Don't hit me please, but just in case :
have you checked if the Microsoft site has any samples on the subject..?

It would probably help if you'd explain what you want to do..!

Windows Media Format sdk :confused:

Anonymous9-Jul-03 7:01

Anonymous

9-Jul-03 7:01

Re: Windows Media Format sdk :confused:

David Crow9-Jul-03 9:02

David Crow

9-Jul-03 9:02

Have you tried www.wotsit.org?

Extracting RGB values from a color

IGeorgeI9-Jul-03 6:44

IGeorgeI

9-Jul-03 6:44

I am receiving an RGB color in a method.

1) I want to strip the color into it's fundamental components.
2) I want to store these values as integers within the method.

Ex. the method gets the color RGB (55, 155, 255)
I want to extract the numbers into variables.

int red = 55;
int green = 155;
int blue = 255;
======================================================

Any suggestions on how to strip the color into it's seperate RGB values????

I've done this before but I can't remember.

George W

Software Developer
www.zsystems.ca

Re: Extracting RGB values from a color

Keith D9-Jul-03 6:51

Keith D

9-Jul-03 6:51

what's the format of the RGB variable? 3 bytes long or what?

Re: Extracting RGB values from a color

Magnus Westin9-Jul-03 7:00

Magnus Westin

9-Jul-03 7:00

GetBValue, GetGValue and GetRValue

Magnus

Re: Extracting RGB values from a color

IGeorgeI9-Jul-03 8:23

IGeorgeI

9-Jul-03 8:23

That's it!!!!

Thanks for your help.

George W

Software Developer
www.zsystems.ca

LZW anybody??

keb9-Jul-03 6:31

keb

9-Jul-03 6:31

Ok... I didn't have any luck yesterday but I have a feeling someone can save me here today... Well, I am looking for free shareware, library to handle LZW data. I am writing a software that import and export graphics and hoping to avoide Unisys patent. Any suggestions anybody??? Roll eyes | :rolleyes:

Re: LZW anybody??

Larry Antram9-Jul-03 7:33

Larry Antram

9-Jul-03 7:33

The LZW patent is no longer relevant in the U.S. (it expired last month). Take a look at CxImage[^] for importing/exporting graphics.

Re: LZW anybody??

keb9-Jul-03 7:40

keb

9-Jul-03 7:40

Well, I am hoping to use this software in Asia and Europe as well as here and unfortunately the patant has not expired in those places. I was hoping to find an algorithm or free shareware to get by with Unisys but may be I just have to bite the bullet here.. hmmmm.. Thanks for the link. This may be something I can use later. Cool | :cool:

Re: LZW anybody??

Larry Antram9-Jul-03 7:45

Larry Antram

9-Jul-03 7:45

Just use PNG instead... it was created specifically to avoid LZW patent issues. CxImage includes support.

Re: LZW anybody??

John M. Drescher9-Jul-03 8:13

John M. Drescher

9-Jul-03 8:13

Larry Antram wrote:
Just use PNG instead...

This is what I tell everyone. Do not use TIFF or GIF and all will be fine.

John

Re: LZW anybody??

peterchen9-Jul-03 9:51

peterchen

9-Jul-03 9:51

Unisys doesn't license to shareware or freeware authors.
That is, Unisys doesn't license to library developers anymore at all. The final application is the one that is allowed to pay royalties.

Meaning: Whatever you do, it's illegal in Europe and Asia, until the patent(s) expire.

"Der Geist des Kriegers ist erwacht / Ich hab die Macht" StS

sighist | Agile Programming | doxygen

Re: LZW anybody??

perlmunger9-Jul-03 7:45

perlmunger

9-Jul-03 7:45

If you're using GIFs *AT ALL* you cannot avoid the Unisys patent. As far as a library to handle it, look at GDI+ (namespace System.Drawing.Imaging). It handles many different image formats including GIF with the "Image" and "Bitmap" objects. Someone correct me if I'm wrong, but I think you just have to license the GIF "technology" from Unisys if you distribute it.

Good luck.

-Matt

------------------------------------------

The 3 great virtues of a programmer:
Laziness, Impatience, and Hubris.
--Larry Wall

wincrypt.h

Tili9-Jul-03 6:24

Tili

9-Jul-03 6:24

HI.
I am trying to use CryptoAPI.
But the problem is that even after including wincrypt.h i get undeclared identifier for any cryptoapi related data type or function.
I see this #if in wincrypt.h
#if(_WIN32_WINNT >= 0x0400)
I tried to define _WIN32_WINNT = 0x5000 as i am using win2k.
But after that i get error on this line in wincrypt.h
typedef LONG HRESULT;
missing identifier before HRESULT.
What the hell am i missing?

-----------------------------
In my dream, I was dorwning my §orrow§
But my §orrow§, they learned to §wim

Re: wincrypt.h

Tili9-Jul-03 6:36

Tili

9-Jul-03 6:36

I found the solution. SO I thought to post it over here so that others can take advantage of that.
I found the solution in this article.
I had to define 2 preprocessor macros.
_WIN32_WINNT=0x0400,_CRYPT32_ (NT4)
The article i found this was
http://www.codeproject.com/cpp/plaintextsessionkey.asp[^]
Wink | ;)

;);););)

-----------------------------
In my dream, I was dorwning my §orrow§
But my §orrow§, they learned to §wim

inserting text into a rich edit view

crapfacejoe9-Jul-03 6:12

crapfacejoe

9-Jul-03 6:12

In my MFC app, I am able to insert text via StreamIn, but this replaces all the text in the view with the new text. What I want is to insert text at the current cursor position and not have it erase the contents of my document. There has got to be a way to do this, eh?

Thanks!

Re: inserting text into a rich edit view

Ryan Binns9-Jul-03 15:27

Ryan Binns

9-Jul-03 15:27

use ReplaceSel(). If there is no selection, it inserts at the current position. If there is a selection, it will replace it.

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Bit operation

Anonymous9-Jul-03 6:08

Anonymous

9-Jul-03 6:08

Say I have a set of 8 LED's and need to send a byte as a unified command to set on/Off for a LED

1 LED = 1 bit (0=Off , 1 = On )

I am having trouble combining two cases

lets consider just LED 0 that corresponds to bit 0

I work according to a input command
Case 1 :
Say a command for LED0 is ON

What I need to do is the following :

Get the Status of 8 LEDS in a byte

my Mask = 0x01

OR this Mask with the byte received .

Send the Byte

--------------------------------------

Case 2
Command for LED0 is Off
What I need to do is the following
Get the Status of 8 leds in a byte
my Mask = ~(0x01)= 0xFE
AND the result with the byte received .

Send the Byte

IS there a way I can combine both cases

Like I want to eliminate the difference in AND / OR and have a single bit operation .
I know I can do all this using an IF else. I was wondering if this can be achieved using bit operations .

Re: Bit operation

John M. Drescher9-Jul-03 6:18

John M. Drescher

9-Jul-03 6:18

I am not sure what you are trying to do. Do you want to test the status of LED0? If so just AND it with 0x01. Are you trying to set the status? Then I think you need both cases AND to turn it off and OR to turn it on.

John

Re: Bit operation

David Chamberlain9-Jul-03 7:07

David Chamberlain

9-Jul-03 7:07

In effect, you have one operation for turning a bit/LED on and a second operation for turning a bit/LED off, and you are wanting to perform both operations on a set of bits/LEDs at the same time. Your operations are for "change."

If you know the "new" status of all 8 bits/LEDs, then it is easy to just send all 8 bits together and be done with it. If, on the other hand, you know the "new" status only for some of the 8 bits/LEDs, then really you do know the "current" status for all 8 bits/LEDs, since some will be from the "previous" state and others will be from the "new" state.

In any case, since at that point you know how all 8 bits/LEDs should be displayed, just send out the new settings and don't think about how they have "changed." Think of the operation as a "set."

Dave

"You can say that again." -- Dept. of Redundancy Dept.

Updating toolbar buttons or menu

Rno359-Jul-03 6:07

Rno35

9-Jul-03 6:07

Hi,

Here it goes: the user of my program click a button of a toolbar. Then a function is executed corresponding to this button.
I am using a document/view architecture with VC++ 6 and I am able to change the state of the button (i.e. grayed, checked…) only once the function is finished.

I would like to be able to update the state of the toolbar button of menu while executing the function:

<br />
void CMyProjectView::OnButtonDown() <br />
{<br />
	// initialize variables<br />
<br />
	// change the state of toolbar buttons<br />
<br />
		// Do code here<br />
<br />
	// restore the starting state of toolbar buttons<br />
}<br />

Thanks,

Rno

Re: Updating toolbar buttons or menu

John R. Shaw9-Jul-03 8:29

John R. Shaw

9-Jul-03 8:29

EnableWindow()

INTP

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