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List: kde-bugs-dist
Subject: [Bug 148238] New: fast switching between preview modes
From: Dik Takken <d.h.j.takken () phys ! uu ! nl>
Date: 2007-07-26 20:57:00
Message-ID: 20070726225659.148238.d.h.j.takken () phys ! uu ! nl
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http://bugs.kde.org/show_bug.cgi?id=148238
Summary: fast switching between preview modes
Product: digikamimageplugins
Version: unspecified
Platform: unspecified
OS/Version: Linux
Status: NEW
Severity: wishlist
Priority: NOR
Component: general
AssignedTo: digikam-devel kde org
ReportedBy: d.h.j.takken phys uu nl
Version: 0.9.2 (using KDE KDE 3.5.5)
OS: Linux
It would be nice to allow fast switching between preview modes. I'm referring to the \
"original left, filtered right", 'original on top, filtered at bottom' and so on \
modes. Every time you switch, the preview needs to be re-rendered.
Maybe the preview could be rendered for the entire viewport (not just for the right \
half of the viewport for instance), stored in a memory buffer and re-painted when the \
preview mode changes.
Or even better: Maybe the preview could *always* be painted from a permanent memory \
buffer, which lives as long as the plugin dialog is active: When the dialog is \
opened, the buffer is created and a preview is rendered into it. The buffer is only \
updated when the user changes settings. Whenever the preview image needs to be \
re-painted, it can be quick-fetched from the memory buffer. When the dialog is \
closed, the buffer is destroyed.
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