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  1. On Tuesday 21 June 2005 14:16, Casper Boemann wrote:
  2. > Hi
  3. >
  4. > As you might have noticed I have changed the tqlayout of the preview, to lo=
  5. ok
  6. > more like digikam.
  7. >
  8. > Now the preview widget itself also needs some updating:
  9. > - zoom doesn't exist in the digikam preview - the image is zoomed all out
  10. > - that doesn't mean we shouldn't keep the abillity to zoom, but I think
  11. > default should be zoomed out as in digikam.
  12. Agreed. We should show all of the image in our preview.
  13. > - the update of the preview seems slow. Is the algorithm as effective as
  14. > it can be?
  15. No, definitely not. In fact, if I remember correctly, preview copies & rend=
  16. ers=20
  17. the complete image. Options are:
  18. * Just preview the active layer, out of context
  19. * Copy the image, scale it down, and then render it. Cache the scaled-down=
  20. =20
  21. thumbnail.
  22. * Work on the QImage of the rendered image, and apply all filters on that -=
  23. =2D=20
  24. for preview, that may be accurate enough.
  25. Note that we want a fast thumbnail preview for in the bird's eye box, too, =
  26. and=20
  27. in the variations dialog we need a whole bunch of previews. So I guess the=
  28. =20
  29. requirements are:
  30. * Frugal with memory
  31. * Fast
  32. * Filters should work on the preview image
  33. * Zoomable, but initially the complete image/layer is shown
  34. * Selectable: preview layer/preview image
  35. I have a feeling that this may be hard to achieve...
  36. > This is not something I'm going to do, but I think we should discuss it a=
  37. nd
  38. > put it in the TODO.
  39. Definitely.=20
  40. =2D-=20
  41. Boudewijn Rempt=20
  42. http://www.valdyas.org/fading/index.cgi
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