Use an OpenGL texture instead of copying frames to system memory

Dockerfile

 FROM debian:bullseye
 
 RUN apt update \
- && apt install -y gcc meson ninja-build libobs-dev \
+ && apt install -y gcc meson ninja-build libobs-dev pkg-config mesa-common-dev \
  && rm -rf /var/lib/apt/lists/*

meson.build

@@ -2,10 +2,11 @@ project('obs-nvfbc', 'c', default_options: ['c_std=c99'])
 
 threads = dependency('threads')
 obs = meson.get_compiler('c').find_library('obs')
+gl = dependency('gl')
 
 shared_library('nvfbc', 'nvfbc.c',
     name_prefix : '',
-    dependencies : [threads, obs],
+    dependencies : [threads, obs, gl],
     install : true,
     install_dir : join_paths(get_option('libdir'), 'obs-plugins'),
 )