Here is my proposal. The filter is applied to the layer on top. But unfortunately it remains a lot of artefacts in rendering.
The process is the following :
1° draw your background object
2° add a new layer and turn its blend mode to Multiply
3° draw a white shape inside your layer on top
4° open the Filters editor and modify the filter you see as in my joined file.
ivan
________________________________ De : Joshua Facemyer <jfacemyer@...400...> À : Yann Papouin <yann.papouin@...400...> Cc : Inkscape Devel List inkscape-devel@lists.sourceforge.net Envoyé le : Mar 30 mars 2010, 15 h 50 min 35 s Objet : Re: [Inkscape-devel] Filter effect and blur background
I'm not that familiar with filter effects, but I almost got it with this:
1. put your shape over the image 2. add a composite effect (atop) to a filter on the shape with the first input being "background image" and the second being "source graphic" 3. add a gaussian blur to to the filter, input directly from the composite effect
The problem is that the whole rectangular region of the shape is blurred. I'm sure there's an easy way to get just the shape to blur the underlying image which shows through it, but I don't know how. I tried again with a composite effect after the blur, but I didn't get anywhere with that.
Anyone else?
JF
On 03/30/2010 05:15 AM, Yann Papouin wrote:
Hi,
Please first take a look at this picture composited in photoshop: http://ftpmerou.free.fr/inkscape/blur-background.png
I tried to reproduce the same effect in inkscape easilly, and i made it by using a copy of the picture, bluring it and applying a mask with a shape to simulate the effect: http://ftpmerou.free.fr/inkscape/blur-background-fakebymask.svg
It's ok now, but I thought about filter effects (background image can be used as a connection link in the filter editor) and saw this: http://www.w3.org/TR/SVG/filters.html#AccessingBackgroundImage
On http://wiki.inkscape.org/wiki/index.php/Filter_Effects there is a note about this property "There's no GUI for setting the enable-background property. This property has to be set on some parent layer of filtered object to make Background Image and Background Alpha input images work."
Does the background image support is implemented? Do you think that the same effect can be achieved with filters by applying the effect on a shape (that will blur its background content)?
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