[Digikam-devel] extragear/graphics/digikam/libs/widgets/imageplugins

[Gerhard Kulzer]

Am Tuesday 17 April 2007 schrieb Gilles Caulier:
> SVN commit 654897 by cgilles:
>
> digikam from trunk : Important improvements here !
>
> The zoom functions available on image editor plugins have been completly
> rewritten. We use now the new common preview widget. The plugins affected
> by these changes are Noise Reduction, Restoration, Sharpen, Gaussian Blur,
> Hot Pixels, Infrared Film, Oil Paint, Emboss, Film Grain, Blur FX, and
> Charcoal.
That's really great Gilles, that's the way it should work.
I'll reflect it in the documentation.

Gerhard

> Let's me explain the difference between the old an new implementations.
>
> With old stuff, the zoom function is very limited :
>
> - zoom factors from x1 to x3 with step 0.5
> - huge memory allocation duing to pre-zoomed picture rendering.
> - very slow.
> - Can frozen the computer when swap is require (with huge pictures)
> - Effect rendering is computed on a redimentionned part of image. It Slow
>
> The new zoom function is completly different :
>
> - Zoom factors from x1 to x12. Free value can be set.
> - No more memory allocation. You can use it with huge pictures. No swap is
> require. - Zooming/paning is based on new common preview widget witch use a
> QPixmap cache in memory. - It's very very fast to change zoom. Can be done
> in live.
> - Effect is computed on crop 1:1 image. render is more fast.
>
> Note : the mouse handling to pan/zoom in preview pannel is the same than
> Image Editor Canvas and Preview Mode from Album Gui.
>
> With Urls given below, you can see the Sharpen Tool in action using the new
> implementation. Note the new zoom slider on the bottom/left of dialog.
>
> http://digikam3rdparty.free.fr/Screenshots/digikam0.9.2-newimagepluginszoom
>function1.png
> http://digikam3rdparty.free.fr/Screenshots/digikam0.9.2-newimagepluginszoom
>function2.png
>
> You will seen than it's now a real pleasure to navigate over the image to
> test an effect...
>
> CCMAIL: digikam-devel at kde.org
>
>
>
>
>  M  +80 -96    imagepannelwidget.cpp
>  M  +19 -19    imagepannelwidget.h
>  M  +207 -241  imageregionwidget.cpp
>  M  +21 -24    imageregionwidget.h
>
>
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-- 
Hakuna matata
http://www.gerhard.fr
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