TCG - terminal cell graphics
Go Graphics library for use in a text terminal. Only 1bit graphics can be used with two colors. Used unicode block symbols for drawing. 2x3 mode is supported by the latest versions of the Iosevka font.
Features
- Available 4 graphics mode, from 2x3 pixels grid for terminal symbol to 1x1, 1x2 and 2x2
- Set/get one pixel
- Drawings: lines (vertical, horizontal, or with any angle), boxes, circles, arcs
- Fill area with a different options, for example fill with patterns
- Buffer manipulating: cut, clone, convert to/from stdlib Image or text
- Buffer transform: BitBlt, clear, flip, invert, scroll (vertical, horizontal)
- Sub-package for turtle graphics, also available drawing by text script
Install
go get -u github.com/msoap/tcg
Usage
package main
import (
"log"
"github.com/gdamore/tcell/v2"
"github.com/msoap/tcg"
)
func main() {
tg, err := tcg.New(tcg.Mode2x3) // each terminal symbol contains a 2x3 pixels grid, also you can use 1x1, 1x2, and 2x2 modes
if err != nil {
log.Fatalf("create tg: %s", err)
}
i := 0
for {
pixColor := tg.Buf.At(10, 10) // get color of pixel
tg.Buf.Set(11, 11, pixColor) // draw one pixel with color from 10,10
tg.Buf.Line(0, 0, 50, i, tcg.Black) // draw a diagonal line
tg.Show() // synchronize buffer with screen
if ev, ok := tg.TCellScreen.PollEvent().(*tcell.EventKey); ok && ev.Rune() == 'q' {
break // exit by 'q' key
}
i++
}
tg.Finish() // finish application and restore screen
}
See more examples in examples folder.
Screenshot
Game of Life example in iTerm2 terminal with Iosevka font:
TODO
- fonts support
- sprites, maybe with animation
See also
Unicode symbols:
- Block Elements - wikipedia
- Block Elements - unicode.org
- Symbols for Legacy Computing - wikipedia
- Symbols for Legacy Computing - unicode.org
Supported fonts:
