Programmatically finding file support.

[boffo]

Hello everyone.

Is there some way to interrogate MagickWand (in c/c++) to find out which file types or file extensions are supported?

For the life of me, I'm not seeing that in the API.

[magick]

You can call MagickSetImageFormat() and if it returns MagickFalse, the image format is not recognized or not supported. You can also call the MagickCore API method GetMagickInfo(). If it returns a non-null result, the image format is recognized and supported by ImageMagick.

[boffo]

Thanks for the response.

So you are saying that the only way I can get a complete set of file formats is to call 'MagickSetImageFormat' for every 2-4 letter combination of letters and numerals? There isn't any way to get back a simple list of what's supported?

regards.

[magick]

You can get a list of all supported image formats with a MagickCore API call:

• p = GetMagickInfo("*",exception);

[boffo]

Aha...thanks.

[boffo]

Ah well...bummer.

It works fine, according to Visual Studio it's loading a whole slew of *.dll's (things like IM_MOD_RL_tga_.dll), and then it gets up to
'IM_MOD_RL_xtrn_.dll'', and then blammo:

First-chance exception at 0x048decd5 in test.exe: 0xC0000005: Access violation reading location 0x00000014.
Unhandled exception at 0x048decd5 in test.exe: 0xC0000005: Access violation reading location 0x00000014.

No biggie, I'll just have to have a list of file types in my own application. It's less elegant but should work fine.

[el_supremo]

FYI: This C function works fine on my Win XP system using IM 6.6.3-9
It writes the list of 208 formats into the file "formats.txt".

Pete

Code: Select all

#include <windows.h>
#include <magick/MagickCore.h>
void test_wand(void)
{
	ExceptionInfo *exception;
	const MagickInfo **mi_ptr = NULL;
	size_t num_ptr; 
	size_t i;
	FILE *fdo = NULL;

	MagickCoreGenesis((char *) NULL,MagickFalse);
	// Get and Initialize an exception info
	exception = AcquireExceptionInfo();
	GetExceptionInfo(exception);

	mi_ptr = GetMagickInfoList("*",&num_ptr,exception);
	if(mi_ptr == NULL) {
		MessageBox(NULL,"NULL list returned","",MB_OK);
	} else {
		fdo = fopen("formats.txt","w");
		for(i=0;i<num_ptr;i++) {
			fprintf(fdo,"%s\n",mi_ptr[i]->name);
		}
		fclose(fdo);
	}

	DestroyExceptionInfo(exception);
	MagickCoreTerminus();
}

[boffo]

Many thanks, that's exactly what I needed to know. It works now.