The old font-renderer was horribly slow. There were several ideas to speed it up but I decided to add the pango backend again. Pango allows us to draw combined-characters and all other kinds of special characters. We would have to rewrite pango if we wouldn't want this dependency so I currently have no idea why we should make it optional. However, some people might not care whether they can correctly display all kind of Unicode text but instead want some shiny kmscon without any dependencies. Therefore, I will keep the old freetype font-renderer even though it is not used yet. However, we can convert it at any time. The new font-renderer is not used yet. We need to cleanup the console layer first before it can be hooked into the terminal. Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
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= KMSCON = Kmscon is a simple terminal emulator based on linux kernel mode setting (KMS). It is an attempt to replace the in-kernel VT implementation with a userspace console. == Requirements == Kmscon requires the following software: - libdrm: accessing the kernel graphics layer - mesa: providing an OpenGL implementation (must be compiled with EGL, gbm and GL libraries) - udev: providing input, video, etc. hotplug support - xproto (build time dependency): definition of keysymbols (TODO: remove it) - libxkbcommon: keyboard handling (optional but strongly recommended) Without libxkbcommon, basic US-ASCII input is provided. - glib: only for Unicode handling (TODO: remove it) - One of: - freetype2: drawing generic text - pango: drawing text with pango (use --enable-pango) Pango requires: glib, cairo, pangocairo, pango and freetype2 == Install == To compile the kmscon binary, run the standard autotools commands: $ ./configure [--enable-debug] [--enable-pango] $ make $ make install (TODO: this is currently not supported) To compile the test applications, run: $ make check == Running == To get usage information, run: $ ./kmscon --help You can then run kmscon with: $ ./kmscon [options] --switchvt The --switchvt option will make your machine switch the active VT directly to kmscon after starting it. == License == This software is licensed under the terms of the MIT license. Please see ./COPYING for further information. == FAQ == === Why didn't you use libvte or similar terminal emulators? === All existing terminal emulators I found highly depend on X. Also, their code base often is a horrible mess. I haven't had the time to convert them to use other drawing functions than Xlib, yet. If you feel like doing this work, please notify me. I would be glad to adjust my code to work with other terminal emulators. == Contact == This software is maintained by: David Herrmann <dh.herrmann@googlemail.com> If you have any questions, do not hesitate to contact one of the maintainers. == Code Base == The kmscon code is split into several independent subsystems: - uterm: This code manages the KMS/DRI output and provides OpenGL framebuffers. - console: This draws the text on the screen and provides an API for any terminal emulator to visualize its contents. - eloop: Main loop implementation. - log: Log file handling. - unicode: Provides basic Unicode handling. - font: Font loading, caching and drawing operations. - input: All linux input events are captured here and converted to Unicode characters for input handling. - vt: The linux VT subsystem integration. This allows to run the application in a classic linux VT like X does. - vte: The terminal emulator library. - terminal: Connects the console, output, input and vte handling into a real terminal. - main: This connects all subsystems into a usable console application.
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