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Re: Graphics related query! Christian Graus27-Dec-01 16:55 Christian Graus 27-Dec-01 16:55  Hiya Nish. Nish [BusterBoy] wrote: some DirectX SDK or OpenGL 2d/3d/whatever? DirectX has DirectDraw, but OpenGL is all 3D AFAIK. Nish [BusterBoy] wrote: Read a PNG file Easiest way is to use GDI+, but there are other ways around it if you need W95 support. Nish [BusterBoy] wrote: Apply a circular mask, using the contrast between the light subject and the dark background to size and position the mask Apply a rectangular mask similarly, possibly rotating the subject to be perpendicular to the canvas Apply a feather to mask Black fill the background leaving the subject alone This is all possible using Win32, your first step is to deal with a DIBSection so you have easy access to the bitmap data to start comparing light/darkness, etc. What the hell is a feather ? You basically want to take a picture of something over a darker background, figure out it's position and draw a circle around it, then a rectangle ( rotating the image so that it's perpendicular ) and do a fill of the darker area ? Do you want to rotate in place, or to a bitmap of approproate size ? The fill part is as easy as pie - step through the bits and any below a threshold get set to 0. The rest doesn't sound over hard, but it's probably of a jump off the deep end if it's your first ever graphics assignment. There is a class here on CP that loads and saves PNG from memory, and GDI+ does it also. Chris Maunder has a DIBSection class here, I am also writing one I could send you, it's simpler than his though. As for the rest, if you could provide some more details, and LMK if you intend on using GDI+ or not, I'd be happy to mail you some more detailed source code to get you started. Christian After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001 Sonork ID 100.10002:MeanManOzI live in Bob's HungOut now Re: Graphics related query! Nish Nishant27-Dec-01 18:13 Nish Nishant 27-Dec-01 18:13  Thanks Christian I guess I'll need some help when I get started. It's been a long time since I had to learn something totally new to me. I'll start by checking out your GDI+ articles I guess. Nish Sonork ID 100.9786 voidmain www.busterboy.org If you don't find me on CP, I'll be at Bob's HungOut Re: Graphics related query! Christian Graus27-Dec-01 18:38 Christian Graus 27-Dec-01 18:38  Nish [BusterBoy] wrote: It's been a long time since I had to learn something totally new to me. Cool. I had to write a paint package and I had *no* idea about PC grapihcs - it was a VERY bumpy ride ( two rewrites in my own time when I realised I'd taken the wrong track ), but I learned a LOT. Nish [BusterBoy] wrote: I'll start by checking out your GDI+ articles I guess. If GDI+ is an option I suspect it will make a lot of this easier. If you could give me a better idea of what you're trying to do ( what is feathering for example, what sort of image are you dealing with, what's the purpose of all this ) then I might be able to help more specifically. If you like I can also send you the code for my next WDJ article, which was supposed to come out in Jan. It is a simple app that loads and saves images in different formats, but more to the point, it illustrates how to access the pixels directly in GDI+, which you'll need to do from the sound of it. Christian After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001 Sonork ID 100.10002:MeanManOzI live in Bob's HungOut now Re: Graphics related query! Nish Nishant27-Dec-01 18:52 Nish Nishant 27-Dec-01 18:52  Christian Graus wrote: what is feathering for example This is what I got from wepopedia:- http://www.webopedia.com/TERM/f/feathering.html Nish Sonork ID 100.9786 voidmain www.busterboy.org If you don't find me on CP, I'll be at Bob's HungOut Re: Graphics related query! Christian Graus27-Dec-01 19:22 Christian Graus 27-Dec-01 19:22  I see - a soften filter but only on the area we've decided is the edge. Easy stuff, done with a convolution matrix. I'll send you some code - can I get your email address from your CP account details ? Christian After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001 Sonork ID 100.10002:MeanManOzI live in Bob's HungOut now Re: Graphics related query! Nish Nishant27-Dec-01 20:48 Nish Nishant 27-Dec-01 20:48  Christian Graus wrote: can I get your email address from your CP account details ? Yes, you can. I've also send you a mail with my email details. My email fullname is "void main". Please don't delete the mail thinking it is spam Nish Sonork ID 100.9786 voidmain www.busterboy.org If you don't find me on CP, I'll be at Bob's HungOut pseudocode(sp?) help Steve L.27-Dec-01 16:12 Steve L. 27-Dec-01 16:12  how do you do pseudocode for: while, do-while, and for loops. Ive been to a bunch of sites and a couple said there was no way to do a for loop and the while and do-while loops didnt seem very good. Is there an official pseudocode site i could go to? -Raffi Re: pseudocode(sp?) help Nish Nishant27-Dec-01 16:45 Nish Nishant 27-Dec-01 16:45  I didnt think pseudocode had any set standards or formats Nish Sonork ID 100.9786 voidmain www.busterboy.org If you don't find me on CP, I'll be at Bob's HungOut XML Program vinuk27-Dec-01 15:40 vinuk 27-Dec-01 15:40  Hello, How do I write a program in Standard C++ that simply extracts the data contained in an XML document and removes the elements(tags). What I mean is, not a full fledged parser, but a simple program that extracts data and that's it. We could use the fstream object to load in the document and then I guess we will need to compare the document for '<' and '>' and remove those words? Thanks, Vinu. Re: XML Program Tim Smith27-Dec-01 15:56 Tim Smith 27-Dec-01 15:56  Take a look at the EXPAT XML parser. Sure, it does a LOT more than you need, but why reinvent the wheel. I am notorious for hating other people's code and wanting to write my own. But I LOVE EXPAT. Tim Smith Descartes Systems Sciences, Inc. Re: XML Program 27-Dec-01 16:18 27-Dec-01 16:18  I need to write code to simply report and extract information from the XML document. Hmm, this makes me think of PERL. Anyway, like I was saying, I don't want a parser, just some code so I can extract only the data instead of the elements. Also I just want to use Standard C++ and not MFC. Re: XML Program Michael Dunn27-Dec-01 16:44 Michael Dunn 27-Dec-01 16:44  Perl could probably do that in one line. Something like: perl -e '$/=undef; $_=<>; s/<.*?>/ /g; print;' < file.xml > output.txt I think $/ is the right variable to undefine to make <> slurp in the whole file, newlines and all. --Mike-- My really out-of-date homepage Buffy's on. Gotta go, bye! Sonork - 100.10414 AcidHelm Big fan of Alyson Hannigan. Re: XML Program 27-Dec-01 17:04 27-Dec-01 17:04  That is good, but it is written in Perl. Could someone translate that into Standard C++ so I can compile it in C++? Thanks, Vinu. Re: XML Program Nish Nishant27-Dec-01 21:02 Nish Nishant 27-Dec-01 21:02  I second Time Smith . Use Expat. It's the best SAX parser out there for C/C++ programmers Nish Sonork ID 100.9786 voidmain www.busterboy.org If you don't find me on CP, I'll be at Bob's HungOut Re: XML Program Tim Smith28-Dec-01 2:17 Tim Smith 28-Dec-01 2:17  Time Nish? hehehe Tim Smith Descartes Systems Sciences, Inc. Re: XML Program Nish Nishant28-Dec-01 18:52 Nish Nishant 28-Dec-01 18:52  LOL Sorry Tim. I am a bad typist! Nish Sonork ID 100.9786 voidmain www.busterboy.org If you don't find me on CP, I'll be at Bob's HungOut Re: XML Program Tim Smith28-Dec-01 2:24 Tim Smith 28-Dec-01 2:24  If you are just going to ignore people's sugestions without even looking at them, then why come here and ask. Tim Smith Descartes Systems Sciences, Inc. writing and retrieving data from a file hforbess27-Dec-01 11:53 hforbess 27-Dec-01 11:53  Hello, Trying to bridge the gap between what I was taught in school and MFC. In school we created Btree file structures. It occurred to me that there is probably already made classes that are more sophisticated than the ones I created in school. Could someone point me in the right direction? Do I need to learn STL, for example? Say, for example, I wanted to write an MFC address book. I can do that but how do I write the data to a file and then retrieve when the program is run again? I mean, I cant see busting out my project and throwing into MFC. Seems like MFC would have a way to do such a common task. Do I need to look at CObject and serialization? Thanks in advance. harry Re: btrees and other file structures Nemanja Trifunovic27-Dec-01 12:28 Nemanja Trifunovic 27-Dec-01 12:28  There is no Btree in STL or MFC (or any other library that I know of). However, I'm pretty sure that some B-tree implementations can be found on the Web I vote pro drink Re: writing and retrieving data from a file Not Active27-Dec-01 13:04 Not Active 27-Dec-01 13:04  CObject and serialization would be a place to start. Depending on your requirements and/or ambition you may want to look at a database of some kind, Access, MSDE, etc. Otherwise simply writing and reading from a flat file or XML document may be sufficient. Re: writing and retrieving data from a file markkuk27-Dec-01 19:53 markkuk 27-Dec-01 19:53  The point of using STL or MFC containers is that you don't need to know the low-level implementation of the data structure (B-tree, AVL tree, hash table or whatever). MFC CMap class is probably what you should use for your application. Keyboard hooks... Rickard Andersson2027-Dec-01 9:44 Rickard Andersson20 27-Dec-01 9:44  I want to make a combination with Alt + F12... How to make it with hooks? ------------------------------ ©0d3 ©®4©k3® - That's me! ------------------------------ Re: Keyboard hooks... 567890123430-Dec-01 1:39 5678901234 30-Dec-01 1:39  What means "Make a combination"? If you want to handle Alt+F12 in the program, use WM_SYSKEYDOWN message handler. If you want to generate keyboard event, use keybd_event (Alt down, F12 down, F12 up, Alt up). If you want to handle Alt+F12 in keyboard hook procedure, all required information is in wParam and lParam. Win XP 27-Dec-01 7:52 27-Dec-01 7:52  I am trying to learn C++ and have the XP home edition on my computer. Does this mean I will not be able to create programs that have #include <iostream> in the include section of the code? Re: Win XP Rickard Andersson2027-Dec-01 9:03 Rickard Andersson20 27-Dec-01 9:03  What have you read when you think something like that is impossible! Well, #include is something that you write to include a file like windows.h to use functions and constants from that file... it works to use #include on any computer you want! You are a very very very very very... beginner on C++, aren't you!? ------------------------------ ©0d3 ©®4©k3® - That's me! ------------------------------

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