[Magick-bugs] Problem with colorspace conversion under Windows

[Cesare Leonardi]

Hi all.
I have found a problem converting the colorspace from CMYK to RGB using
"ImageMagick-6.3.3-1-Q16-windows-dll.exe" and today i've verified that 
it is still present in "ImageMagick-6.3.3-4-Q16-windows-dll.exe".

I've sent this mail before with attachments to clarify the problem but 
it was blocked, so i'll try to explain without them. As i said, in this 
mail i talk about 6.3.3-1 but i've verified the problem is still present 
in 6.3.3-4.

I have this simple bash script that i use both under Debian Sid and
under cygwin in my Windows 2000 Pro SP4 machine:

----------------------------------------------------------
#!/bin/bash

if [ -d "$PROGRAMFILES" ]; then
      BINPATH="$PROGRAMFILES/ImageMagick/convert.exe"
else
      BINPATH="convert"
fi

"$BINPATH" "$1" -colorspace RGB -resize 74  "$1-small.jpg"
"$BINPATH" "$1" -colorspace RGB -resize 650 "$1-big.jpg"
----------------------------------------------------------

I've tested successfully this script under my Debian box (that uses
ImageMagick 6.2.4 02/10/07 Q16) and it works fine.
But under Windows (that as i said, uses the latest 6.3.3-1) everything
looks ok, except that black become white. All the aother colors seems ok.
You can test this by creating a CMYK image with all the fundamental 
color clearly labeled and running the previous command on it.

Then i've tryed to uninstall 6.3.3-1 and i've noted that the same script
works fine using some old binaries i have:
OK: ImageMagick-6.2.8-7-Q16-windows-dll.exe
OK: ImageMagick-6.3.2-2-Q16-windows-dll.exe

So something is happended between 6.3.2-2 and 6.3.3-1.

Regards.

Cesare.