Quic n' dirty tool to convert a gimp gradient to a HTML5 Canvas Gradient (or with a little bit of modification, any other type gradient)

GGR2Canvas.py

#!/usr/bin/env python
import sys
def lerp(s,e,t):
    return s + (e-s)*t
def printStop(gradient_name, t, rgba):
    newRGBA = [int(c*255) for c in rgba]
    format_args = tuple([gradient_name, t] + newRGBA)
    return "%s.addColorStop(%f, \"rgba(%d, %d, %d, %d)\");\n"%format_args; 
def parseGimpGradient(filename):
    file = open(filename, "r");
    file.readline();
    name = file.readline();
    num_segments = int(file.readline());
    segments = [[float(x) for x in file.readline().split()] for i in range(num_segments)];
    gradient_name = name[len("Name: "):-1].replace(' ', '_');
    resultStr = "%s = context.createLinearGradient(0,0,100,0);\n"%(gradient_name, );
    for segment in segments:
        start_pos = segment[0];
        mid_pos = segment[1];
        end_pos = segment[2];
    
        start_rgb = segment[3:7];
        end_rgb = segment[7:11];
        resultStr += printStop(gradient_name, start_pos, start_rgb);
        p = (mid_pos - start_pos) / (end_pos - start_pos);
        mid_rgb = [lerp(start_rgb[x], end_rgb[x], p)  for x in range(4)]
        resultStr += printStop(gradient_name, mid_pos, mid_rgb);
    resultStr += printStop(gradient_name, end_pos, end_rgb);
    return resultStr

if __name__ == "__main__":
    if len(sys.argv) != 2:
        sys.exit("Usage: %s path_to_gimp_gradient");
    print(parseGimpGradient(sys.argv[1]));