Q: Both the camera and libjpeg are used to support the jpeg format. If both are enabled which one is preffered ?
A: Jpeg files will be handled by jpeg codec anyway. CAMERA codec uses dcraw, which can additionally support libjpeg library (for thumbnail support I think).
Q: Both freetype and freetype-devel are installed, but TTF codec is disabled.
A: TTF codec is designed for freetype-2.2.1. Since freetype is not binary compatible from version to version it is not guaranteed that TTF codec will be built successfully with other versions of freetype.
Q: How to build ksquirrel-libs for x86_64 ?
A: Just use ./configure.gnu --libdir=/usr/lib64 to configure ksquirrel-libs.
Q: I compiled and installed ksquirrel-libs, but ./configure.gnu for ksquirrel gave out: error: "Header file konq_operations.h is missing. Please install kdebase-devel package.
A: Try to install kde-devel metapackage, it works on Debian/KUbuntu systems:
# apt-get install kde-devel
Q: Are all images in all opened tabs stored in video memory (e.g. in OpenGL textures) ?
A: No, only current image is stored in video memory.
Q: Are all image pages in animation stored in video memory (e.g. in OpenGL textures) ?
A: Yes. Animations are usually small images.
Q: How to crop image ?
A: Open any image in image window, press Ctrl+R and select a rectangle. Then press Y.
Q: Can I remove codecs from /usr/lib/ksquirrel-libs/ ?
A: Yes. You can freely remove all codecs you don't need.
Q: Any suggestions ?
A: It is highly recommended to stop FAM daemon when running KSquirrel.
A: To speed up startup you can freely remove all files from /usr/lib/ksquirrel-libs, except *.so.0.8.0.
A: Save geometry, position and fullscreen state of image window in its KWin properties: