Thank you. What about jpeg format? Can DirectFB save a snapshot to this format or maybe to convert a PPM format to jpeg?
On Wed, Sep 12, 2012 at 4:04 PM, Oliver Gabel <oliver.ga...@physik.tu-darmstadt.de> wrote: > Do you want to take a screenshot? > -> Quoting from DirectFb/docs/README.screenshots: > > > How to make DirectFB screenshots > -------------------------------- > > There are two ways to generate DirectFB screenshots. The easy way is > to set the "screenshot-dir" parameter in the DirectFB configuration > file directfbrc or to pass it as a command-line option. See the > directfbrc man-page for more details. You can then generate screen > dumps in the PPM format by pressing the PrintScreen key. The PPM > files can easily be converted to others formats using for example the > netpbm tools. > > The hard way to do screenshots is to read directly from the frame > buffer device. This works for all applications that use the frame > buffer device, not only for DirectFB applications. > > The resulting data is then converted to a more convenient format using > the netpbm graphics conversion tools. If the frame buffer is not > running at 24 bit depth, the data has to be propagated to 24bit RGB > before netpbm can handle it. The tools directory contains the source > for two small utilities that do just this: > > raw16toraw24 is a small tool that reads 16bit RGB565 data from stdin, > converts to 24bit RGB888 data and writes it to stdout. > > raw15toraw24 is a small tool that reads 15bit RGB555 data from stdin, > converts to 24bit RGB888 data and writes it to stdout. > > raw32toraw24 is a small tool that reads 32bit ARGB data from stdin, > converts to 24bit RGB888 data and writes it to stdout. > > > The following steps have to be performed to take screenshots: > > Step 1 - Log in from another computer using ssh or telnet. Start your > application and stop it by pressing Ctrl+C in the remote > terminal. > > Step 2 - Read data from /dev/fb0 and write it to a file. > > examples: > [15bit] raw15toraw24 < /dev/fb0 > raw24.tmp > [16bit] raw16toraw24 < /dev/fb0 > raw24.tmp > [24bit] cat /dev/fb0 > raw24.tmp > [32bit] raw32toraw24 < /dev/fb0 > raw24.tmp > > Step 2 - Convert data to ppm using rawtoppm and specify the resolution of > the frame buffer. > > example: rawtoppm 800 600 raw24.tmp > ppm24.tmp > > Step 3 - Convert ppm to png using pnmtopng. > > example : pnmtopng <ppm24.tmp >screenshot.png > > > Thats it! > > > > > Am 12.09.2012 12:15, schrieb Alla N: >> >> Hi, >> >> I want to save a framebuffer to some file. Can I do it with DirectFB? >> >> Thanks. >> _______________________________________________ >> directfb-users mailing list >> directfb-users@directfb.org >> http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-users >> > _______________________________________________ directfb-users mailing list directfb-users@directfb.org http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-users
