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On Tuesday 21 June 2005 14:16, Casper Boemann wrote:
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> Hi
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>
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> As you might have noticed I have changed the layout of the preview, to lo=
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ok
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> more like digikam.
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>
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> Now the preview widget itself also needs some updating:
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> - zoom doesn't exist in the digikam preview - the image is zoomed all out
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> - that doesn't mean we shouldn't keep the abillity to zoom, but I think
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> default should be zoomed out as in digikam.
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Agreed. We should show all of the image in our preview.
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> - the update of the preview seems slow. Is the algorithm as effective as
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> it can be?
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No, definitely not. In fact, if I remember correctly, preview copies & rend=
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ers=20
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the complete image. Options are:
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* Just preview the active layer, out of context
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* Copy the image, scale it down, and then render it. Cache the scaled-down=
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=20
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thumbnail.
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* Work on the TQImage of the rendered image, and apply all filters on that -=
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=2D=20
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for preview, that may be accurate enough.
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Note that we want a fast thumbnail preview for in the bird's eye box, too, =
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and=20
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in the variations dialog we need a whole bunch of previews. So I guess the=
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=20
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requirements are:
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* Frugal with memory
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* Fast
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* Filters should work on the preview image
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* Zoomable, but initially the complete image/layer is shown
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* Selectable: preview layer/preview image
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I have a feeling that this may be hard to achieve...
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> This is not something I'm going to do, but I think we should discuss it a=
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nd
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> put it in the TODO.
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Definitely.=20
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=2D-=20
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Boudewijn Rempt=20
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http://www.valdyas.org/fading/index.cgi
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