Canvas is a graphic server able to perform simple drawing operations. It can draw only three primitives: a point, a line and a triangle. The purpose of this project is to have a ready drawing tool to couple other software for drawing operations without much boilerplate. It runs a socket server on localhost:8080 which accepts the following instructions
- draw a point:
P x y r g b - draw a line:
L x0 y0 r0 g0 b0 x1 y1 r1 g1 b1 - draw a triangle:
T x0 y0 r0 g0 b0 x1 y1 r1 g1 b1 x2 y2 r2 g2 b2 - clear the window:
clear
All the parameters are floats. Positions (x*, y*) range from -1.0 to 1.0 and colors (r, g, b) range from 0.0 to 1.0. All drawing operations are displayed on 512x512 window, and the colors are linearly interpolated.
Open a telnet session with telnet 0.0.0.0 8080 and send the following commands
T 0.0 0.0 1.0 0.0 0.0 0.0 1.0 0.0 1.0 0.0 1.0 0.0 0.0 0.0 1.0
L 0.0 0.0 1.0 0.0 0.0 -1.0 -1.0 0.0 0.0 1.0
The result is displayed as
- Add options (width, height, port, ...)
- Add the possibility to change backend (X, file, html5 canvas, ...)