[TYPO3-dev] resize images : gd and freetype

[Kay Strobach]

Hi Jigal,

that sounds perfectly ;)

Regards
Kay

Am 20.05.2011 14:24, schrieb Jigal van Hemert:
> Hi,
> 
> On 19-5-2011 10:45, Ismaël Bidau wrote:
>> I'm just asking why TYPO3 needs freetype just for scaling image (Install
>> toll > Image Processing > Gd library fonction has "Fatal error Call to
>> undefined function ImageTTFBBox()").
> 
> This part of the Install Tool tests not only pure GD library functions,
> but also rendering of text. Even if IM/GM is present the Freetype
> routines are used to render text in images.
> 
> In PHP you need GD library to render text with Freetype. That is
> probably the reason why the text rendering tests are listed on the Gd
> library function page in the Install Tool.
> 
>> And perhaps having GD2 per default to resize images is a good idea.
>> Nearly everybody want to resize images and it could simplified the
>> system requirements.
>> http://forge.typo3.org/issues/20107
> 
> Using GD library for resizing has one huge limitation and that is that
> it cannot be used for really big images. The entire image is loaded into
> memory as a 32-bit bitmap. For images produced by modern cameras in an
> already memory hunger application such a TYPO3 that could easily result
> in out-of-memory errors. (Another limitation is the file types supported
> by GD)
> 
> On the positive side: I am currently writing a new graphics library for
> TYPO3 v4. It will use handlers to perform the necessary operations. I
> will try to add handlers using GD library, ImageMagick 6, GraphicsMagick
> and possibly Imagick and Gmagick (the PHP libraries for IM/GM which do
> no require the use of exec() functions).
> The GD handler needs to use some checks for available memory to safely
> create thumbnails.
> 
> I will do my best to have this included in TYPO3 4.6.
> 


-- 
http://www.kay-strobach.de - Open Source Rocks