Can't use CMYK images with Zend_Pdf

Hi,
I need some help. I'm trying to create a PDF, and the images
need to be 
CMYK, but they are coming out wrong in the final PDF. If I
use JPEG's 
the image colours appear inverted, if I use TIFF the images
are complete 
corrupt, all you get is a black box covered in noise, and if
I use PNG 
all the colours are blown out, as though the brightness has
been turned 
right up.

Any help would be appreciated,
Thanks,
-- 
Jack

I tested several CMYK images while writing the parsers but
they always 
worked fine. Please log the bug in the tracker and include
whatever image is 
giving you greif and we can look into it.

Kevin
----- Original Message ----- 
From: "Jack Sleight" <jack.sleightgmail.com>
To: <fw-formatslists.zend.com>
Sent: Monday, October 01, 2007 2:28 AM
Subject: [fw-formats] Can't use CMYK images with Zend_Pdf


> Hi,
> I need some help. I'm trying to create a PDF, and the
images need to be 
> CMYK, but they are coming out wrong in the final PDF.
If I use JPEG's the 
> image colours appear inverted, if I use TIFF the images
are complete 
> corrupt, all you get is a black box covered in noise,
and if I use PNG all 
> the colours are blown out, as though the brightness has
been turned right 
> up.
>
> Any help would be appreciated,
> Thanks,
> -- 
> Jack 

I've done some further investigating, and the JPEG problem
still exists 
(I've created a new issue: ZF-2020). The TIFF issue was down
to the TIFF 
files that ImageMagick outputs. If I save a CMYK TIFF from
Photoshop it 
works fine, so I don't think this was a Zend_Pdf problem.

One other odd thing is that all vertical measurements start
from the 
bottom of the page, is this intended behaviour?

Kevin McArthur wrote:
> I tested several CMYK images while writing the parsers
but they always 
> worked fine. Please log the bug in the tracker and
include whatever 
> image is giving you greif and we can look into it.
>
> Kevin
> ----- Original Message ----- From: "Jack
Sleight" 
> <jack.sleightgmail.com>
> To: <fw-formatslists.zend.com>
> Sent: Monday, October 01, 2007 2:28 AM
> Subject: [fw-formats] Can't use CMYK images with
Zend_Pdf
>
>
>
>

-- 
Jack

> I've done some further investigating, and the JPEG
problem still exists 
> (I've created a new issue: ZF-2020).

Jpeg is the only parser I _didn't_ write =P It's provided by
GD. There is 
already an 'upgrade image subclass' task in the tracker
which will result in 
a jpeg parser being written when we get time. If you set
that task as a 
blocker to this bug, then it should keep it organized but
this wont likely 
be fixed any time soon.

As a quick workaround you can use imagick to convert the
jpeg to rgb before 
adding it to the pdf; a hack if you're going to print it,
but probably fine 
if its for screen display.

> The TIFF issue was down to the TIFF files that
ImageMagick outputs.

Any details of what Imagick was doing (identify --verbose)
would be useful 
for figuring out how to adjust the parser. The tiff parser
works 99% with 
the official tiff test image suite. (found here 
http://r
emotesensing.org/libtiff/images.html)

> If I save a CMYK TIFF from Photoshop it works fine, so
I don't think this 
> was a Zend_Pdf problem.

Good to hear.

> One other odd thing is that all vertical measurements
start from the 
> bottom of the page, is this intended behaviour?

Yes, Pdf documents have a 0,0 of bottom-left as per the pdf
standards. 
Counter-intuitive I know, and theres been discussion of an
inversion flag 
but it never really went anywhere.

Kevin

>
> Kevin McArthur wrote:
>> I tested several CMYK images while writing the
parsers but they always 
>> worked fine. Please log the bug in the tracker and
include whatever image 
>> is giving you greif and we can look into it.
>>
>> Kevin
>> ----- Original Message ----- From: "Jack
Sleight" 
>> <jack.sleightgmail.com>
>> To: <fw-formatslists.zend.com>
>> Sent: Monday, October 01, 2007 2:28 AM
>> Subject: [fw-formats] Can't use CMYK images with
Zend_Pdf
>>
>>
>>
>>
>
> -- 
> Jack