GENCLOCKIMG

	genclockimg is a small program to generate clock face PNG images.
	I made it to generate a time index watermark for my timelapse videos.

	It is written in C and uses cairo and libpopt. These are fairly common
	and chances are high you already have this installed on your system.
	
	I used rahra's cairo_jpg library to handle JPEG images.
	See https://github.com/rahra/cairo_jpg

BUILDING

	To build genclockimg you need libcairo and libpopt and 
	their accompanying dev packages installed. You'll also need 
	a C compiler and GNU Make.

	To build the program:

		make

	To test:

		./genclockimg

	A file 'out.png' should appear.

	To install:

		make install
		
	To uninstall:
	
		make uninstall

RUNNING

	By default, running the program will create a 128x128 PNG image called 'out.png'
	in the current directory. The image will contain a simple analog clock indicating
	the current time.

OPTIONS

	-o filename
		Output filename. The .png extension is NOT added automaticly!
		The output is always PNG, even if you name the file differently.
		
	-t HH:MM
		Time to show on the clock
		
	-w width
		Width of the clock image in pixels
		
	-h height
		Height of the clock image in pixels
		
	
EXAMPLES

	Generate a series of clock images based on the timestamps of a series of source images:
	
	for file in *.jpg; do genclockimg -t `date -r "${file}" +"%H:%M"` -o "${file}-clock.png"; done
	
LICENSE

	genclockimg is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser 
	General Public License as published by the Free Software Foundation, either version 3 of the License, 
	or (at your option) any later version.

	genclockimg is distributed WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
	
	You should have received a copy of the GNU General Public License along with genclockimg. 
	If not, see https://www.gnu.org/licenses/.

	Copyright (c) 2022, Stijn Buys