Chroma Graphics

Real time broadcast graphics application built in Golang using GTK go bindings.

Installation

• Copy default_conf.json in artist/ and viz/ and rename to conf.json.
• Download and build Chroma Engine. The preview window uses cgo to create a GtkGLRender window using Chroma Engine. The expected file structure is shown below, either copy or symlink files from Chroma Engine. For an alternative structure, modify the compiler flags in library/preview.go.

chroma-viz
├───library
│   └───preview.go
├───chroma-engine
│   ├───libchroma.a
│   └───chroma-engine.h
...

• Setup a sql database (e.g. mariadb)

Chroma Hub

• (First Install) Import the db schema in library/hub/chroma_hub.sql to the sql db or start Chroma Hub in the next step with the -c flag.
• Run Chroma Hub

go run ./cmd/chroma-hub -u <username> -p <password>

where username and password correspond to the user login for the sql database.

• Chroma Hub creates a REST api at the port specified on startup, which is makes assets available to Chroma Viz, Artist and Engine.

Chroma Viz

• Run Chroma Viz

go run ./cmd/chroma-viz

Chroma Artist

• Run Chroma Artist

go run ./cmd/chroma-artist

Features

Chroma Viz retrieves a list of templates from Chroma Hub on startup. Chroma Viz communicates with Chroma Engine over tcp to render graphics.

• Pages can be easily created from templates by double clicking on the template in the template list.
• Each page has its own set of properties, editable through the editor
• Chroma Engine combines the template and the data set in the editor to render the graphic.

demo.mp4

Chroma Artist can be used to design templates, which can be imported to Chroma Hub.

• Tree View for creating the heirachy of geometry elements
• Keyframes for creating animations, by setting a geometry attribute to a value, the value given by the user, or a value of another attribute.
• Import/Export templates and assets to Chroma Hub.

artist_demo.mp4

Disclaimer

This is a personal project, not an application intended for production.