bigredeye/librterm

Cross-platform terminal emulator library

librterm's Issues

Migrate from SDL2_ttf / SDL2_image to libfreetype / libpng.

Related to #14. SDL2_ttf and SDL2_image are not in public conan repos, so it will be difficult to use them. In addition, we don't need SDL2_ttf / SDL2_image for raw OpenGL implementation, libfreetype / libpng will suffice.

Nicer cmake configuration

CMake should automatically find SDL2 libraries and OpenGL.

CI builds

Configure CI to build linux/windows binaries, AFAIK it's possible.

Synchronous event polling

On Windows terminal cannot receive events from different thread. The solution is quite simple -- add rterm::Term::poll() and remove all code related to threading.

Optimization

Problem

On my GTX 1070 in benchmark mode i get only ~180 fps, and on GT 820m benchmark runs on 45 fps. It's really slow, so i have to find ways to speed up.

Suggestions

• I should split background texture and text;
• Add rterm::Term::move function to save time
• Add big screen buffer

OpenGL

We should use OpenGL for text rendering because SDL2 copies whole texture to GPU each frame and this is extremely slow.

Several different APIs usage

The rendering logics should be isolated from a high-level api, so we will be able to use different APIs:
the first two should be SDL2 and OpenGL.

Optimize glyph cache

Usage of a small number of hardware textures for glyph cache will significantly increase the rendering speed.

Conan package

• Use conan to collect SDL2 / GLAD / FreeType / etc
• Packet it.

Custom event system

SDL's event system is ugly, so it is very difficult provide complex event handling. This code

rterm::Term term(...);
term.onKeyDown([](rterm::Key key){
    /* do something with key */
});

Looks much nicer than

rterm::Term term(...);
while (term.isRunning()) {
    rterm::Key key = term.getKey();
    /* do something with key */
}

Now we have the second one.