bitmap pattern prints at wrong resolution

[Alvin Penner]

Windows XP, Inkscape rev 11668.
the attached diagram has two ovals with patterns. The vector graphics pattern prints correctly but the bitmap (sand) pattern prints out extremely grainy as though the resolution was extremely low.

[Alvin Penner (apenner)]

attached is the pdf output produced by PDF Creator. This is very similar, although not exactly identical to the physical printout.

(if the svg file is saved as pdf, then the pdf file is correct, no distortion of the pattern)

[Alvin Penner (apenner)]

- reproduced on Inkscape 0.48.3.1
- not reproduced on Inkscape 0.47

[jazzynico (jazzynico)]

Reproduced on Windows XP, Inkscape trunk revision 11701, printing with PDF creator as vector.
Not reproduced when printing as bitmap.

[Alvin Penner (apenner)]

- not reproduced on Inkscape 0.47pre1, July 3, 2009
- reproduced on Inkscape rev 22583, Nov 22, 2009

the size of the bitmap image is dependent on the printer resolution. The image would print correctly if it were printed on a printer that had a resolution of 9000 dpi. The problem appears to be related to the use of a new rendering context (just for patterns) called pattern_ctx, which uses the scale factor SUBPIX_SCALE = 100 when defining the output resolution (cairo-render-context.cpp)

[jazzynico (jazzynico)]

Confirming it doesn't affect Debian stable distros (tested with rev. 12862 on Crunchbang Waldorf).

[Alvin Penner (apenner)]

I can no longer reproduce this problem on Windows 10, Inkscape 1.0alpha (9cedb1b, 2019-02-08)

[Qantas94Heavy (qantas94heavy)]

Can't reproduce this in Inkscape 0.92.4 on openSUSE TW 20190411, closing as no longer relevant.

Closed by: https://gitlab.com/Qantas94Heavy

[Nathaniel Walizer (jrhoffa)]

This repros on 0.92.4 on Windows 10.

[Nathaniel Walizer (jrhoffa)]

This repros on 1.0beta2 (0b0ed59, 2020-01-19) on Windows 10.