Chromium Embedded Framework for Free Pascal
Download CEF3 from here and copy all .dll files from either Debug or Release to the directory your .exe is / will be in.
Install cef3.lpk into Lazarus
Look into the examples
Download CEF3 from here and copy / link libcef.so (and maybe libffmpegsumo.so),
a) to a default library location, eg. /usr/lib(64), /usr/local/lib(64) OR
b) somewhere and set LD_LIBRARY_PATH accordingly
Install cef3.lpk into Lazarus
Look into the examples
Important: make sure you have cthreads as the first unit in your main program.
Also libcef.so needs the resources (folder locales and cef.pak, you can find them in the CEF package) in the directory your executable is in.
Don't use --single-process and don't change CefSingleProcess to True.
This will trigger a SIGSEGV in pthread_mutex_lock, which is a bug in either CEF3 or Chromium itself: You can find more details here
If crashes occur too often, you might try to turn off runtime checks in the project settings (mainly -Ct and -CR).
If you're using openSUSE (maybe some other distros, too) and your program crashes immediately after being started, you could try to execute
echo 1073741824 > /proc/sys/kernel/shmmaxand see if the crash goes away.
That is a known bug in Chromium, which still isn't fixed.
If the browser goes "blank" (e.g. when loading a page), the render process crashed.
Most of the time it seems to be related to JavaScript/V8, see Debugging on how to debug the render process.
Please note, that the render process will be automatically restarted on the next page request.
When initialising CEF for the first time (mostly in your main app) a subprocess is started. By default a second instance of the main program is used as the subprocess. The preferred way however is to define an own (minimal) subprocess executable.
You can achieve this in fpCEF3 by setting CefBrowserSubprocessPath to the path of your subprocess executable.
In the LCLSimple example this can be done by changing TMainform.FormCreate at the end of main.pas.
A minimal subprocess can be found in /Examples/SubProcess. It should work for any use case.
Note, that the subprocess also needs the CEF3 library and resources in its path, so the easiest way is to put the subprocess executable in the same folder as the main exe.
More details here
Sometimes it is useful to debug the subprocesses spawned by cef. On Linux this can be done by adding
--renderer-cmd-prefix='xterm -title renderer -e gdb --args'to the command line.
Further details can be found here.
fpCEF3 only supports CEF3, no support for CEF1.
See changelog for the latest supported version, older ones usually don't work, newer ones may work, but are not recommended.
- Windows
- Linux with GTK2
The plain header should be ready for Mac (maybe with small changes), but the component needs to be adopted.
Overall it looks good now, especially the Windows part. Unfortunately there seem to be bugs in Chromium / CEF3 itself as far as Linux is concerned.
No, but you can find information in
- cef3lib.pas / cef3api.pas
- the sample programs (admittedly very basic ones)
- the official api docs here
- the official cefclient example program here
If you feel like contributing some more Pascal examples - please do.
- compatibility with Free Pascal / Lazarus
- reworked unit layout - more modular
- slightly changed mechanism for loading the library
- removed VLC and FMX component
Of course - patches are always welcome :)
To a certain amount - yes.