>>>>> "KL" == Keiron Liddle <[EMAIL PROTECTED]> writes:
KL> On Tue, 2002-07-02 at 13:36, Thomas E Deweese wrote: - started
KL> implementation of patterns and gradients Patterns generally
KL> work. The gradient coordinates are currently wrong, I'm not sure
KL> how to get this right.
>> Anything we can do to help? Pointers to the suspected problem
>> areas?
KL> I have worked out what was wrong, I need to apply the gradients
KL> transform and the transform for the current pdf state because the
KL> coords need to be abolute for pdf. It seems to be working for
KL> linear and radial gradients - the asf-logo.svg works, thats the
KL> most important thing!
Sounds good.
KL> Unfortunately it appears that pdf cannot handle all the radial
KL> gradients. It only has a single radius whereas in svg rx and ry
KL> may be different.
This can be done by applying an additional transform
scale(1, ry/rx);
Then just use rx as the radious (the scale will then distort it
into the proper ellipse).
KL> Also the center point cannot be outside the circle centered around
KL> the focal point with the given radius. There may be ways to
KL> handle this but it is too complicated for now.
In fact even in SVG the point must be inside the circle, but
renderers are required to move the point to the edge of the circle by
moving it along the line through the center of the circle or some
such. In fact if you have compensated for your scale for the focal,
point (fx'=fx, fy'=fy*rx/ry) then you can just use the simple circle
equasion (not ellipse).
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