[cairo] cairo_text_extents - imprecise width calculation?

[Alexander Korban]

Hi

I'm using cairo under win32, and I noticed that
cairo_text_extents doesn't always return precise
results.
It seems that precision of the extents depends on font
scale (set using cairo_scale_font).

For example, with this code (I'm trying to center
text):

cairo_select_font(pCairo, "Tahoma",
CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_BOLD);
cairo_font_scale(0.6);
cairo_text_extents_t extents;
cairo_text_extents(pCairo, "OPEN", &extents);
cairo_move_to(pCairo, 0.5 - (extents.width / 2 +
extents.x_bearing), 0.5);
cairo_show_text(pCairo, "OPEN");

the text is off from the centered position to the
right
by about one character. However, when the font scale
is set to 0.65,
everything looks fine.

Could anyone give any suggestions please?

Best regards
Alex Korban.
-- 
Best regards
Alex Korban.


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