Pipeline HDR and plugins

CINELERRA-GG runs internally in 32-bit floating-point and thus can read and process HDR media. However, there are plugins and tools that can introduce clipping that must be taken into account to keep the whole pipeline in HDR. The limited plugins are: Blur; Color 3 Way (partially); Color Space; Foreground; Histogram (partially); Histogram Bezier; Title; Videoscope (partially).