Re: imageCreateFromString Empty string or invalid image

Quoting vuser1 <[email protected]>:

> Hello ansel users!
>
>
>
> Yesterday I installed horde-webmail-1.2.3 and ansel-h3-1.0. Image  
> gallery with preview thumbnails works fine, but website cannot  
> render the image when I click on it. In /tmp/horde.log:
>
>
>
> Jul 01 13:22:21 HORDE [error] [ansel] imageCreateFromString:  
> imagecreatefromstring() [<a  
> href='function.imagecreatefromstring'>function.imagecreatefromstring</a>]:  
> Empty string or invalid image [pid 20055 on line 175 of  
> "/usr/share/horde/ansel/lib/ Views/Image.php"]
>
> Jul 01 13:22:22 HORDE [emergency] [ansel] imagejpeg: imagejpeg():  
> supplied argument is not a valid Image resource [pid 20055 on line  
> 44 of "/usr/share/horde/ansel/img/screen.php"]
>
>
>
> Ubuntu 8.04
>
> https://my-site/horde/ansel/test.php:
>
> PHP Version: 5.2.4-2ubuntu5.6
>
> PHP Major Version: 5.2
>
> PHP Minor Version: 4
>
> PHP Subminor Version: 2ubuntu5.6
>
> PHP Version Classification: release
>
> You are running a supported version of PHP.
>
>
>
> PHP Module Capabilities
>
> GD Support: Yes
>
> Imagick Library: No
>
> Zip Support: Yes
>
> OpenCV Library: No
>
> Facedetect Face Detection Library: No
>
> Puzzle Library: No
>
>
>
> PEAR Search Path (PHP's include_path):   
> /usr/share/horde/lib:/usr/share/horde/lib/../pear
>
> PEAR: Yes
>
> Recent PEAR: Yes
>
> MDB2: Yes
>
>
>
> At first I tried to install imagick (pecl install imagick), but  
> later I disabled it in php.ini.
>
> The line producing an error:
>
> 173:        $geometry = $this->resource->getDimensions('screen');
>
> 174:        if (is_a($geometry, 'PEAR_Error')) {
>
> 175:            Horde::logMessage($geometry->getMessage(), __FILE__,  
> __LINE__, PEAR_LOG_ERR);
>
>
>
> I am in stuck, why thumbnails works, but image view ? don?t? What  
> should I try/check?

There were a number of bugs introduced into Ansel due to a change in  
the way those "screen" images are generated. If your interested, we  
always generate them as jpeg files now, regardless of the configured  
image format setting since they are smaller and we would never need  
the alpha channel capabilities of PNG images for those images...this  
leads to reduced bandwidth and storage requirements.

Anyway, those issues are already fixed in CVS. The best thing to do  
would be to update to the current framework_3 branch code.  If you  
can't do that, you could switch to the imagemagick driver by providing  
the path to your convert program.  The im driver is a *much* better  
driver both in terms of efficiency and output.


Thanks,
mike

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