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Hi all,
I'd love to benefit from some of the expert advice which I regularly see on this site...
I'm creating a new application which will include high-end video playback with live compositing of graphics and possibly even 3D elements. It can be a bespoke system and therefore can be reliant on high-end graphics cards and specific software configurations. It could be targeted specifically at Windows XP or Vista.
My current experience includes most graphics/multimedia apps plus the following dev environments:
- C++
- MFC
- C#
- .Net
- Managed DirectX (currently learning)
For playback I am currently looking at DirectX as the primary technology. Does anyone have any advice or specific resources for the following:
- OpenGL v. DirectX for 2D rather than 3D
- 2D uses of DirectX (Directshow's future seems vague)
- General advice
Many thanks in advance guys,
Simon Reveley
Guildford,
UK
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I have some code from an old C++ 4.0 project that I am trying to update for a friend. I know very little about C++. I have some C experience and some C# experience.
Does anybody have some answers to these questions.
Would I need the old Visual C++ 4.0 to view and compile the code?
Could I use a newer version like 5.0 or 6.0 to view and compile the code?
Would I have to change the code to use in a newer version?
Is there any way I could make it work in Visual Studio 2005?
If there is anyone that could give me some direction, I would appreciate it.
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I would try to compile and run it with either VC5.0 or VC6.0
even then i could be possible that you need to change some code to get it working.
Eventually you could try VS2005 but again probably with some code changes.
If its a relative simple program you could do it in one step, but if you have the other
compilers i would suggest to do it step by step
codito ergo sum
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There's no way for us to answer that, it depends entirely on the code. Compile it and see what happens.
Unless the code is using some MS extension or library that existed only in v4, or is relying on behavior that changed between v4 and now, there's no reason it shouldn't compile on v5-8.
--Mike--
Visual C++ MVP 
LINKS~! Ericahist | PimpFish | CP SearchBar v3.0 | C++ Forum FAQ
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Hello,
Sometimes when looking at C++ code I see member function code that contains a statement(s) with 2 colons as shown below:
HRESULT CSomeClass::OnDraw()
{
//2 COLONS HERE
-> ::DeleteObject(hbmpOld);
}
What does the resolution operator refer to inside the function?
Thanks,
Jerry
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It means to call the function at the global level, rather than calling the one with the same signature that might be defined as a member of the class.
People that start writing code immediately are programmers (or hackers), people that ask questions first are Software Engineers - Graham Shanks
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:: is the resolution operator.
It makes the scope of the function to global.
usually as there is no global function with the same name declared it will point to the win32 api function. So generally we use this for calling a win32 api.
in ur case ::DeleteObject(hbmpOld); means it invokes this GDI api.
cheers..mil10
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Sir,
I used the word "plzzzzzzzz" just to make a request n not for begging and if u r thinking so, u r on mistake. Instead of criticising if u will help other, its much better for u n other people.And thanks for the reply.............
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jalpari wrote: Sir,
I used the word "plzzzzzzzz" just to make a request n not for begging and if u r thinking so, u r on mistake. Instead of criticising if u will help other, its much better for u n other people.And thanks for the reply.............
 
Regards,
Nish
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You stand a much better chance of receiving help if you'll lose the SMS stuff.
"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain
"We will be known forever by the tracks we leave." - Native American Proverb
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:|Yes it will compile! I have already got it working. I just need other instructions. It is not like drawing on a piece of paper. Computer language is not the same thing. C++
Charles Reese
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I think he ment write the goal of the application down in pseudo code on paper. Then move to a programming language like c++.
like this
pseudo code: to draw * in triangle
draw *
draw **
draw ***
...
draw ***...* now create a function to draw a line giving the number of asterixes you need
draw_line 1
draw_line 2
draw_line 3
..
draw_line n we now see a sort of iteration meaning a loop construct (for , do, while)
for count = 1 to n
draw_line count
next the draw line code looks simular
for number of asterixes = 1 to n
draw *
next
We can now convert this into real code very easy
<code>void draw_line(int iNumberOfAsterix)
{
for(int iCount = 0; iCount < iNumberOfAsterix; iCount = iCount + 1)
{
cout << "*";
}
cout << endl;
}
int main()
{
int iNumberOfLines = 5;
for(int iCount; iCount < iNumberOfLines; iCount = iCount + 1)
{
draw_line(iCount);
}
return 0;
}</code>
just include the correct headers and it will work.
I hope that this is what you needed
codito ergo sum
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do you know what you're talking about ?
you'd better learn C++ first 
you are on codeproject since only 2 days, and you already attack the big members on this forum. tssss, it's far from being a good solution to get an answer to your problem.
TOXCCT >>> GEII power
[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]
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How can I launch my COM exe server under some user?
Where can I define "username", "password"?
Thank you.
Petro
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1) Type dcomcnfg in the Run dialog
2) Expand Component Service ->Computers -> My Computer -> DCOM Config
3) Select ur component
4) Right click and select properties.
5) Click on the Identity tab in the Properties dialog box.
6) Select "This user" readio button and enter the user credentials under which u need to run the component.
cheers...mil10
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I am using C++ This is what I have thus far any ideas how to finish it. I know I need to use nesting, but what other instructions do I need?
int = asterisk '*';
int = counter + 1;
void main()
{
for(counter = 1; counter >= 10; counter = counter + 1)
{
cout << '*' << endl;
}
}
Charles Reese
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How would YOU do it on paper if someone asked you to write "*" to draw a triangle ?
Once you know how to do it on paper, you will see what is missing from your small sample.
Maximilien Lincourt
Your Head A Splode - Strong Bad
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Here's one way:
---------------
// Console.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <iostream>
#include <string>
using namespace std;
void DoStuff()
{
string s;
for (int i=0; i<10; ++i)
{
s += "*";
cout << s << endl;
}
}
int main(int argc, char* argv[])
{
DoStuff();
return 0;
}
Steve
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I am using C++ This is what I have thus far any ideas how to finish it. I know I need to use nesting, but what other instructions do I need?
int = asterisk '*';
int = counter + 1;
void main()
{
for(counter = 1; counter >= 10; counter = counter + 1)
{
}
Charles Reese
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Charles Reese wrote: int = asterisk '*';
int = counter + 1;
You do realize this will not compile, don't you? The compiler will issue a C2513 error.
Charles Reese wrote: for(counter = 1; counter >= 10; counter = counter + 1)
This loop will execute 0 times.
"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain
"We will be known forever by the tracks we leave." - Native American Proverb
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Hi everybody.
I have developed an ActiveX control with Visual C++ 6.0. That control is used by a Visual Basic application and running in Win98 - WinXP. It works fine, VERY FINE!! 
Now, I have to develop a Win CE aplication, the UI maybe with .NET, (VB.NET or C#) and I want to know if my old good control will run, (or compile), in that plataform without change the code, (or not too much).
My control implement:
- Serial communication using the standard windows API, (CreateFile(), WriteFile(), etc).
- Multithreading, (with synchronization). Important for keep the comm alive.
- A lot of MFC arrays like CByteArray, CObArray, CArray, etc.
- Serialization. Well, many of these array, (line above) are serialized.
I will save a lot of time if I could make a shortcut implementing that control instead of write a new one.
Thank you for your help.
Demian.
"I have always wished that my computer would be as easy to use as my
telephone. My wish has come true. I no longer know how to use my telephone."
-Bjarne Stroustrup, computer science professor, designer of C++
programming language (1950- )
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There's no reason why not. CE support most of the Win32 API, and certainly supports everything you've listed there. The best test is to simply compile it targeting CE and see what happens. If it compiles, it should work - the API works practically the same in CE as in XP.
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"
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Hi.
I am trying to obtain the pixel colors from a webcam feed. Ideally I would be able to put the color in an array for further analysis (even though I am new to C++, I think I have an elementary grasp of array manipulation).
I am trying to use the DX Capture program I obtained from codeguru (http://www.codeguru.com/Cpp/G-M/dir...icle.php/c6973 - in the "Home >> Visual C++ / C++ >> Graphics & Multimedia >> DirectX >> DirectShow"
category and is called "Simultaneous Previewing & Video Capture using DirectShow."), using Visual Studio C++ .NET 2003. I cannot figure out how to modify the program to obtain the pixel colors. It does not have to be this program, by the way - any suggestions of better programs would be welcome.
I suspect that Convert24Image or ImageCapture might be of use.
The overall purpose is to identify lit lines on the target image, which is an instrument screen that displays a line (possibly two) whenever the instrument is used.
If I have not included enough details, or I am not being clear, please tell me so.
Any help would be very much appreciated (and please be aware that I have just begun learning the C++ language).
Lessthannovice.
"Everything is always ok in the the end. If it's not ok, then it isn't the end."
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You could use GetFrame() to get the pointer to the BYTE array of the image data you are looking for. He does some conversions to ensure that this BYTE array is the image data in RGB24.
This is just a guess, I didn't test this code.
BYTE *pData;
GetFrame(&pData);
RGBTRIPLE *pImage = static_cast<RGBTRIPLE*>(pData);
for(int y = 0; y < m_nHeight; y++)
{
for(int x = 0; x < m_nWidth; x++)
{
(pImage+(y*m_nWidth)+x)->rgbtBlue;
(pImage+(y*m_nWidth)+x)->rgbtGreen;
(pImage+(y*m_nWidth)+x)->rgbtRed;
}
}
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