C / C++ / MFC

Re: MFC C++ Compiler Options difference between the debug and release

5-Mar-17 21:22

LPCTSTR = Long Pointer to Const Tchar STRing

This will be const wchar_t * for Unicode builds and const char * for ANSI/multi-byte builds.

ForNow6-Mar-17 12:44

ForNow

6-Mar-17 12:44

thanks

Re: MFC C++ Compiler Options difference between the debug and release

David Crow6-Mar-17 2:07

David Crow

6-Mar-17 2:07

This has nothing to do with compiler options, per se. Use the _T() macro for the format string.

"One man's wage rise is another man's price increase." - Harold Wilson

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Re: MFC C++ Compiler Options difference between the debug and release

Victor Nijegorodov7-Mar-17 7:11

Victor Nijegorodov

7-Mar-17 7:11

ForNow wrote:
mainly with CString.Format (I was using it like the C sprintf) and it looked for const wchar_t * for the format string

Please, next time show the exact error message together with a line (or a couple of lines) causing the error.

ImageMagick++ - ErrorMissingDelegate at memorry location

Rajeev Raina2-Mar-17 0:46

Re: ImageMagick++ - ErrorMissingDelegate at memorry location

2-Mar-17 0:46

I have downloaded and installed ImageMagick++ from http://www.imagemagick.org/Magick++/.

I am using Windows7 32 bit and Visual Studio 2008. I want to use the ImageMagick in an existing project. I made the required/suggested changes to my project properties like adding dependencies etc. I added three libraries in the additional dependencies (CORE_RL_Magick++_.lib,CORE_RL_MagickCore_.lib and CORE_RL_MagickWand_.lib

I added

Magick++.h header file and
using namespace Magick
Then

Magick:: Image image (No error)
image.read("5.png") throws an error "ErrorMissingDelegate at memorry location ....".
I tried other image formats also, but same error.

Please help.

Jochen Arndt2-Mar-17 1:10

Re: ImageMagick++ - ErrorMissingDelegate at memorry location

2-Mar-17 1:10

Would be good to know the complete error message.

A quick search in ImageMagick/constitute.c at master · ImageMagick/ImageMagick · GitHub[^] shows that the ReadImage function reports delegate errors with "NoEncodeDelegateForThisImageFormat".

Searching this in the net gives the answer:
You have to install delegates for the image formats to be used.

Rajeev Raina2-Mar-17 1:52

Re: ImageMagick++ - ErrorMissingDelegate at memorry location

2-Mar-17 1:52

Thanks for the reply.

The complete message is Magick::ErrorMissingDelegate at memory location 0x0012fafc.

I can understand there are some missing delegates but I really do not understand how do I have to install them.

Regards

Jochen Arndt2-Mar-17 2:09

Re: ImageMagick++ - ErrorMissingDelegate at memorry location

2-Mar-17 2:09

I have only used ImageMagick on Linux so far and never build it (used the distribution binaries).

You should read the provided documentation: Advanced Windows Installation[^]

Read the "ENVIRONMENT VARIABLES" section and check if your build has created the required modules. If not, check the build configuration.

To check if it works in general, use an image format that does not require a delegate like GIF or JPEG.

If you are still stuck you might get better help in one of the ImageMagick Forums[^] (or even find the solution in an existing thread or FAQ there).

Rajeev Raina2-Mar-17 2:45

Re: ImageMagick++ - ErrorMissingDelegate at memorry location

2-Mar-17 2:45

Thanks again. I am also using the Windows Binaries. I tried with GIF and JPEG but same error message.

Jochen Arndt2-Mar-17 3:01

Re: ImageMagick++ - ErrorMissingDelegate at memorry location

2-Mar-17 3:01

Have you initialised the library?

Magick++[^]:
Note, under Windows (and possibly the Mac) it may be necessary to initialize the ImageMagick library prior to using the Magick++ library. This initialization is performed by passing the path to the ImageMagick DLLs (assumed to be in the same directory as your program) to the InitializeMagick() function call. This is commonly performed by providing the path to your program (argv[0]) as shown in the following example:

int main( int argc, char ** argv) {
InitializeMagick(*argv);
...

and copied the DLLs to the path of your executable (Debug resp. Release) or used the path to the DLLs?

Rajeev Raina2-Mar-17 6:28

Re: ImageMagick++ - ErrorMissingDelegate at memorry location

2-Mar-17 6:28

Thanks for the reply. Yes, it is as advised by you. I am not even able to run the demo project (Button) provided with the Windows Binary Installer.

Jochen Arndt2-Mar-17 22:02

Re: ImageMagick++ - ErrorMissingDelegate at memorry location

2-Mar-17 22:02

Then I'm not able to help anymore.

I can only suggest to check your installation (all required modules present) and the setup (e.g. all required pathes set).

Randor 7-Mar-17 10:28

Randor

7-Mar-17 10:28

Hi,

Sounds like you are compiling ImageMagick without any image libraries.

Rajeev Raina wrote:
Magick:: Image image (No error)image.read("5.png") throws an error "ErrorMissingDelegate at memorry location ....".I tried other image formats also, but same error.

LIBPNG[^]
LIBJPEG[^]
LibTIFF[^]
Many others...

Then recompile with:
./configure
--with-png=yes
--with-jpeg=yes
--with-tiff=yes

It can be alot of work... you might be better off downloading a precompiled binary:
Install from Binary Distribution @ ImageMagick[^]

Best Wishes,
-David Delaune

What is the difference between turboc, visual studio and online compilers

ArvindSai1-Mar-17 19:26

Re: What is the difference between turboc, visual studio and online compilers

1-Mar-17 19:26

Hi guys,
When i first started learning programming language(ofcourse C!!) in my college I used to practice it on turboc compiler, Now a days we are using visual studio and online compilers and I found myself that the program which is executed in turboc without any error will show up with an error/s or warning/s in visual studio, if I made the necessary corrections to the program in order to execute it in visual studio with out any errors, it show will show up with errors on using online compiler why is that happening??, what is the difference between them??, why couldn't they execute the same program(say C program) which is already error free in other compilers??

Richard MacCutchan1-Mar-17 20:45

Richard MacCutchan

1-Mar-17 20:45

Usually because the compilers are different levels, or do not implement the full standards properly. TurboC is very old and most likely allows things that Microsoft's C compiler (not Visual Studio) does not. As to online compilers you would need to check their details.

Re: What is the difference between turboc, visual studio and online compilers

ArvindSai1-Mar-17 23:33

Re: What is the difference between turboc, visual studio and online compilers

1-Mar-17 23:33

Thanks a lott..I think ur answer should help me.

Jochen Arndt2-Mar-17 0:21

Re: What is the difference between turboc, visual studio and online compilers

2-Mar-17 0:21

That happens most likely when using non standard functions from compiler specific libraries (defined in corresponding header files). The Turbo-C and Microsoft compilers are only available for DOS resp. Windows and provide therefore some OS specific functions. Online compilers are usually not OS specific and will therefore only support standard C.

The C standard itself has also been changed with time. So recent compilers using a newer standard may issue warnings or errors for code that was tolerable with older standards. However, these compilers usually have an option to compile code using the C89/C90 standard.

A short overview of the C standard history:

K&R, 1978
ANSI C / C89, 1989
ISO C / C90, 1990; basically the same as C89
C99
C11

So C code conforming to the standards should compile with all compilers supporting that standard and when selecting an older standard if necessary.

But code conforming to the C standard is rather rare. Most code will use some OS specific functions like POSIX on Unix systems and the DOS specific functions with DOS/Windows compilers.

ArvindSai2-Mar-17 3:47

Re: What is the difference between turboc, visual studio and online compilers

2-Mar-17 3:47

thank u

leon de boer2-Mar-17 2:11

leon de boer

2-Mar-17 2:11

Jochen Arndt answer is almost spot on. The only thing I would add is on many compilers they have command line flags you can use to set the standard of C you want or need.

On GCC compilers for example it's the -std flag .... -std=c89 makes it compile with c89 standard etc. On visual studio it's under the compiler settings options on your project settings.

So if you have old code you know the standard it was written with you can just ask the compiler to use that standard. Really old code you can basically guess is going to be C89 and selecting that will remove many of the warnings and errors that won't be accepted by the newer standards.

The newer standards stop some old coding styles that were considered dangerous either from the programmer making a mistake or hackers exploiting with things like buffer overruns. The newer standards also have some new features in the language the old syntax won't understand.

So if you are writing new code you should write to the newest standard your compiler accepts. If you just need to compile an old code just change the compiler standard back to what you need or else you must correct the code to the newer standard. On large code libraries that can be a daunting task and so usually you take the standard change option.

In vino veritas

Re: What is the difference between turboc, visual studio and online compilers

ArvindSai2-Mar-17 2:18