https://github.com/max1220/lfb
Lua framebuffer binding(Using ioctl & /dev/fb*)
https://github.com/max1220/lfb
drawing drawing-library framebuffer lua
Last synced: 4 months ago
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Lua framebuffer binding(Using ioctl & /dev/fb*)
- Host: GitHub
- URL: https://github.com/max1220/lfb
- Owner: max1220
- License: mit
- Created: 2016-04-02T05:02:23.000Z (over 9 years ago)
- Default Branch: master
- Last Pushed: 2018-03-08T21:47:09.000Z (almost 8 years ago)
- Last Synced: 2025-04-10T10:47:34.707Z (9 months ago)
- Topics: drawing, drawing-library, framebuffer, lua
- Language: C
- Size: 184 KB
- Stars: 6
- Watchers: 2
- Forks: 3
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
lfb
===
Binding to Linux Framebuffers, using no external dependencys.
Install
-------
`make`
There is no installation, just copy the lfb.so file to where ever you need it.
You can check where lua looks for modules with: `lua -e "print(package.cpath:gsub(';', '\n'):gsub('?', '[filename]'))"`
Usage
-----
Since version 1.0 lfb uses a buffer for all drawing operations that is then drawn to the framebuffer.
Don't expect compability with versions < 1.
lfb coordinates start at 0,0 and go to width-1,height-1. r,g,b are in the range 0-255.
command | description
------------------------------- | -----------
lfb.version() | Version string
fb = lfb.new_framebuffer(fbdev) | Creates a new framebuffer userspace object & returns it. fbdev is a string, for example "/dev/fb0"
db = lfb.new_drawbuffer(w,h) | Creates a new drawing buffer.
command | description
--------------------- | -----------
fb:get_varinfo() | Get variable info in a table (See http://lxr.free-electrons.com/source/include/uapi/linux/fb.h#L240)
fb:get_fixinfo() | Get fixed info in a table (See http://lxr.free-electrons.com/source/include/uapi/linux/fb.h#L156)
fb:set_varinfo(vinfo) | Sets variable info (Variable names are as in getvarinfo; You don't need to specify all of them, only the ones you want to change)
fb:close() | Closes the framebuffer
fb:__tostring() | Returns an identifier for the framebuffer device (For example: "Framebuffer: /dev/fb0 (inteldrmfb)")
command | description
-------------------------------- | -----------
db.width | Width
db.height | Height
r,g,b,a = db:get_pixel(x,y) | Gets r,g,b,a at x,y
db:set_pixel(x,y,r,g,b,a) | Sets x,y to r,g,b,a
db:set_rect(x,y,w,h,r,g,b,a) | Fills the rectangle specified via x,y,w,h to r,g,b,a
db:set_box(x,y,w,h,r,g,b,a) | Draws the outline of the rectangle w,h at x,y in r,g,b,a
db:set_line(x0,y0,x1,y1,r,g,b,a) | Draws a line from x0,y0 to x1,y1 in r,g,b,a
db:clear(r,g,b,a) | Fill with r,g,b,a
db:pixel_function(function(x,y,r,g,b,a) return r,g,b,a end) | Execute a function for each pixel in db that should return the new r,g,b,a values at x,y
db:draw_to_framebuffer(fb, x, y) | Draws db to the fb at x,y
db:draw_to_drawbuffer(tdb, tx, ty, ox, oy, w, h) | Draws db to tdb at tx,ty. ox,oy is the offset in the origin drawbuffer. w,h set the area to draw.
Examples
--------
See examples/ folder.
Screenshots
-----------
##examples/colors.lua##
##examples/spin.lua##
##examples/rect_benchmark.lua##
