Gimp, nuova libreria GEGL per la gestione delle immagini ~ Re Ubuntu

Continua l'evoluzione di uno dei migliori editor grafici open source, infatti dopo le numerose richieste degli utenti GIMP ha rilasciato un importante aggiornamento, si tratta di GIMP 2.6 , ultima versione che include una serie di modifiche per l'interfaccia utente ,gli strumenti e plugin ,miglioramenti importanti per un software che era già il mio preferito per quano riguarda la grafica free e ora lo sarà ancor di più .

Il programma per l’editing di immagini e per il fotoritocco, infatti, integra - con il rilascio, appena avvenuto, della versione 2.6 - la nuova libreria GEGL (Generic Graphics Library) per la gestione delle immagini che utilizza 32 bit anziché 8 bit come invece accadeva sinora.

GEGL non è abilitata in modo predefinito: per il momento Gimp continuerà ad utilizzare di default le solite librerie. L’utente è comunque libero di attivare GEGL servendosi del menù Colors, Use GEGL del programma.

GEGL (Generic Graphics Library) is a graph based image processing framework.

GEGL provides infrastructure to do demand based cached non destructive image editing on larger than RAM buffers. Through babl it provides support for a wide range of color models and pixel storage formats for input and output.

Features

* Floating point handling and processing and output of larger 8bit, 16bit integer and 32bit floating point per component buffers larger than RAM.
* C, vala, C#, http:// Python and Ruby interfaces using a consistent DOM like graph API to manage processing graphs.
* Processing
o Iterative chunk-wise processing.
o Processes subregions and dependencies.
o Subgraph caches to aid performance of non-destructive editing.
* GeglBuffer
o Storage of all babl supported formats.
o Tiled sparse buffers (larger than RAM images).
o linear buffers (allocated internally or from external allocation.)
o On demand tiled mipmapping.
o inter process shared storage
* Operations
o PNG, JPEG, SVG, EXR, RAW, ffmpeg, v4l and other image sources.
o Pattern renderers
o Arithmetic operations
o link_operations.html#porter_duff[porter duff compositing]
o SVG filter modes and full set of compositing ops from SVG-1.2 draft.
o Gaussian blur, bilateral-filter, symmetric nearest neighbour, unsharp mask.
o Color correction.
o Text rendering using cairo and pango.
o Most operations operate in scRGB (using 32bit linear light RGBA)
* Bounding box based hit detection.
* XML serialization format (not-finalized)

This gallery shows samples of GEGL output it is used to both document current capabilities, and help spot regressions.

clones

<?xml version='1.0' encoding='UTF-8'?> <gegl>   <node operation="'over'">       <node operation="'shift'">           <params>             <param name="'x'">10.000000</param>             <param name="'y'">280.000000</param>           </params>       </node>       <node operation="'scale'">           <params>             <param name="'origin-x'">0.000000</param>             <param name="'origin-y'">0.000000</param>             <param name="'filter'">linear</param>             <param name="'hard-edges'">false</param>             <param name="'lanczos-width'">3</param>             <param name="'x'">0.200000</param>             <param name="'y'">0.200000</param>           </params>       </node>       <node operation="'box-blur'">           <params>             <param name="'radius'">5.000000</param>           </params>       </node>       <node operation="'load'" id="'clone0'">           <params>             <param name="'path'">data/car-stack.jpg</param>           </params>       </node>   </node>   <node operation="'over'">       <node operation="'shift'">           <params>             <param name="'x'">10.000000</param>             <param name="'y'">190.000000</param>           </params>       </node>       <node operation="'gamma'">           <params>             <param name="'value'">2.500000</param>           </params>       </node>       <node operation="'scale'">           <params>             <param name="'origin-x'">0.000000</param>             <param name="'origin-y'">0.000000</param>             <param name="'filter'">linear</param>             <param name="'hard-edges'">false</param>             <param name="'lanczos-width'">3</param>             <param name="'x'">0.200000</param>             <param name="'y'">0.200000</param>           </params>       </node>       <clone ref="'clone0'/">   </node>   <node operation="'over'">       <node operation="'shift'">           <params>             <param name="'x'">10.000000</param>             <param name="'y'">100.000000</param>           </params>       </node>       <node operation="'invert'">       </node>       <node operation="'scale'">           <params>             <param name="'origin-x'">0.000000</param>             <param name="'origin-y'">0.000000</param>             <param name="'filter'">linear</param>             <param name="'hard-edges'">false</param>             <param name="'lanczos-width'">3</param>             <param name="'x'">0.200000</param>             <param name="'y'">0.200000</param>           </params>       </node>       <clone ref="'clone0'/">   </node>   <node operation="'over'">       <node operation="'shift'">           <params>             <param name="'x'">10.000000</param>             <param name="'y'">10.000000</param>           </params>       </node>       <node operation="'threshold'">           <params>             <param name="'value'">0.500000</param>           </params>       </node>       <node operation="'scale'">           <params>             <param name="'origin-x'">0.000000</param>             <param name="'origin-y'">0.000000</param>             <param name="'filter'">linear</param>             <param name="'hard-edges'">false</param>             <param name="'lanczos-width'">3</param>             <param name="'x'">0.200000</param>             <param name="'y'">0.200000</param>           </params>       </node>       <clone ref="'clone0'/">   </node>   <node operation="'over'">       <node operation="'shift'">           <params>             <param name="'x'">335.000000</param>             <param name="'y'">210.000000</param>           </params>       </node>       <node operation="'over'">           <node operation="'shift'">               <params>                 <param name="'x'">-10.000000</param>                 <param name="'y'">120.000000</param>               </params>           </node>           <node operation="'opacity'">               <params>                 <param name="'value'">0.600000</param>               </params>           </node>           <node operation="'dst-over'">               <node operation="'opacity'">                   <params>                     <param name="'value'">2.000000</param>                   </params>               </node>               <node operation="'shift'">                   <params>                     <param name="'x'">0.000000</param>                     <param name="'y'">0.000000</param>                   </params>               </node>               <node operation="'box-blur'">                   <params>                     <param name="'radius'">4.000000</param>                   </params>               </node>               <node operation="'brightness-contrast'">                   <params>                     <param name="'contrast'">1.000000</param>                     <param name="'brightness'">-1.000000</param>                   </params>               </node>               <node operation="'text'" id="'clone1'">                   <params>                     <param name="'string'">warming up</param>                     <param name="'font'">Sans</param>                     <param name="'size'">30.000000</param>                     <param name="'color'">rgb(1.0000, 1.0000, 1.0000)</param>                     <param name="'wrap'">-1</param>                     <param name="'alignment'">0</param>                     <param name="'width'">177</param>                     <param name="'height'">36</param>                   </params>               </node>           </node>           <clone ref="'clone1'/">       </node>       <node operation="'scale'">           <params>             <param name="'origin-x'">0.000000</param>             <param name="'origin-y'">0.000000</param>             <param name="'filter'">linear</param>             <param name="'hard-edges'">false</param>             <param name="'lanczos-width'">3</param>             <param name="'x'">0.500000</param>             <param name="'y'">0.500000</param>           </params>       </node>       <node operation="'dst-over'" id="'clone2'">           <node operation="'opacity'">               <params>                 <param name="'value'">0.800000</param>               </params>           </node>           <node operation="'shift'">               <params>                 <param name="'x'">5.000000</param>                 <param name="'y'">-2.000000</param>               </params>           </node>           <node operation="'add'">               <params>                 <param name="'value'">0.500000</param>               </params>           </node>           <node operation="'gaussian-blur'">               <params>                 <param name="'std-dev-x'">5.000000</param>                 <param name="'std-dev-y'">5.000000</param>               </params>           </node>           <node operation="'load'" id="'clone3'">               <params>                 <param name="'path'">data/gegl.png</param>               </params>           </node>       </node>       <clone ref="'clone3'/">   </node>   <node operation="'over'">       <node operation="'shift'">           <params>             <param name="'x'">90.000000</param>             <param name="'y'">90.000000</param>           </params>       </node>       <node operation="'opacity'">           <params>             <param name="'value'">-0.500000</param>           </params>       </node>       <node operation="'box-blur'">           <params>             <param name="'radius'">15.000000</param>           </params>       </node>       <clone ref="'clone2'/">   </node>   <clone ref="'clone0'/"> </gegl>

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