[gs-bugs] [Bug 691115] PDF Pattern Render Error (Shading Pattern, Radial)

[bugs.ghostscript.com-bugzilla-daemon at ghostscript.com]

http://bugs.ghostscript.com/show_bug.cgi?id=691115





------- Additional Comments From robin.watts at artifex.com  2010-02-24 08:52 -------
The stroking side of things looks fine and we end up with a correct 1 pixel wide
rectangle to be filled with the shading.

The code maps this backwards to get a path to be filled (which looks plausible
to me) and then tries to fill it.

This results in a call to fill a rectangle with a shading, and the rectangle to
be filled is correctly 1 pixel wide. The shading code however takes a path that
manages to ignore this clipping rectangle:

 gs_shading_R_fill_rectangle
 gs_shading_R_fill_rectangle_aux
 R_extensions
 R_tensor_annulus
 patch_fill
 fill_patch
 fill_patch
 fill_stripe
 decompose_stripe (recursively 6 times)
 fill_quadrangle
 constant_color_quadrangle
 constant_color_quadrangle_aux
 gx_shade_trapezoid

Presumably, somewhere in there we should have some clipping...




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