Cairo postscript patterns wrong

[Tavmjong Bah]

The export of patterns via Cairo to PostScript is wrong.

Exporting the Strips1_1 pattern with default scaling gives:

 /CairoPattern {
  q
  0 0 20 10 rectclip
0 g
0 10.051 m 0.102 10.051 l 0.102 9.852 l 0 9.852 l 0 10.051 l h
0 10.051 m f
  Q
} bind def

I am not an expert on PS patterns, but this looks like to me that a 10x20 clipping box is being filled by a tiny black box at the upper left corner which is then used as the pattern. (m = moveto, l = lineto, h = closepath, f = fill)

Also the CTM matrix is set to [ 80 0 0 80 0 -680 ] corresponding to a scaling of 80 when, I think, the scaling should be 0.8 (to take into account the Inkscape default to PostScript pixel size: 72/90).

In any case, when I replace the Cairo pattern by

/CairoPattern {
  q
  0 0 20 10 rectclip
0 g
0 0 m 0 10 l 10 10 l 10 0 l 0 0 l h f
  Q
} bind def

and the CTM matrix by [ 0.8 0 0 0.8 0 0 ] I get the correct PostScript output.

This may also be effecting the PDF via Cairo output.

Tested with Inkscape 0.46 and with Cairo 1.6.4.

[Tavmjong Bah (tavmjong-free)]

Fixed when 208217 fixed.