Gordon Royle wrote:
> 
> Hi,
> 
> What is the format of the GIMP gradient files?
> 
> For example, the gradient "default" which goes from black->white with a 
> grey midpoint has the following text format:
> 
> GIMP Gradient
> 1
> 0.000000 0.500000 1.000000 0.000000 0.000000 0.000000 1.000000 1.000000 1.000000 
>1.000000 1.000000 0 0
> 
> and the gradient French flag has the format:
> 
> GIMP Gradient
> 3
> 0.000000 0.166667 0.333333 0.000000 0.000000 1.000000 1.000000 0.000000 0.000000 
>1.000000 1.000000 0 0
> 0.333333 0.500000 0.666667 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 
>1.000000 1.000000 0 0
> 0.666667 0.833333 1.000000 1.000000 0.000000 0.000000 1.000000 1.000000 0.000000 
>0.000000 1.000000 0 0
> 
> So the first number is obviously the number of segments in the gradient,
> and therefore each line must describe one segment.
> 
> The first three values are the left/middle/right end points of the
> segments respectively.
> 
> this leaves me with 8 floating point numbers and 2 integers to 
> describe the three colours - the first 3 numbers seem to be the
> RGB values of the left end point. But what the heck are the 
> remaining numbers? They don't seem to correspond to anything !

The format seems to be
start middle end [range 0...1]
R G B A left endpoint
R G B A right endpoint
type where type is one of linear (0), curved, sine,
sphere_increasing and shere_decreasing
coloring, one of rgb, hsv_ccw, hsv_cw

The type & colouring are accessible to the gradient editor (the
user, I mean) in the "blending function for segment" and "Colouring 
type for segment" menus of the gradient editor menu.

This information is available in app/gradient.c and
app/gradient_header.h.

Dave.

-- 
       David Neary,
    Marseille, France
  E-Mail: [EMAIL PROTECTED]
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