<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> </head> <body bgcolor="#FFFFFF" text="#000000"> <tt>I added font size changes to the example, and print extents with metric on and off.</tt><tt> </tt><tt>The problem which I am addressing appears: font size changes only in steps.</tt><tt> </tt><tt>9.0 pt on Size: 49x7 9.0 pt off Size: 45.7764x7</tt><tt> </tt><tt>9.1 pt on Size: 49x7 9.1 pt off Size: 45.7764x7</tt><tt> </tt><tt>9.2 pt on Size: 49x7 9.2 pt off Size: 45.7764x7</tt><tt> </tt><tt>9.3 pt on Size: 49x7 9.3 pt off Size: 45.7764x7</tt><tt> </tt><tt>9.4 pt on Size: 49x7 9.4 pt off Size: 45.7764x7</tt><tt> </tt><tt>9.5 pt on Size: 51x7 9.5 pt off Size: 50.5293x7</tt><tt> </tt><tt>9.6 pt on Size: 51x7 9.6 pt off Size: 50.5293x7</tt><tt> </tt><tt>9.7 pt on Size: 51x7 9.7 pt off Size: 50.5293x7</tt><tt> </tt><tt>9.8 pt on Size: 51x7 9.8 pt off Size: 50.5293x7</tt><tt> </tt><tt>9.9 pt on Size: 51x7 9.9 pt off Size: 50.5293x7</tt><tt> </tt><tt>10.0 pt on Size: 51x7 10.0 pt off Size: 50.5293x7 I ran also the same example but with PDF surface, and get as output: ctest2 9.0 pt on Size: 45.4951x6.8125 9.0 pt off Size: 45.4951x6.8125 9.1 pt on Size: 45.4951x6.8125 9.1 pt off Size: 45.4951x6.8125 9.2 pt on Size: 45.4951x6.8125 9.2 pt off Size: 45.4951x6.8125 9.3 pt on Size: 45.4951x6.8125 9.3 pt off Size: 45.4951x6.8125 9.4 pt on Size: 45.4951x6.8125 9.4 pt off Size: 45.4951x6.8125 9.5 pt on Size: 50.5605x7.5625 9.5 pt off Size: 50.5605x7.5625 9.6 pt on Size: 50.5605x7.5625 9.6 pt off Size: 50.5605x7.5625 9.7 pt on Size: 50.5605x7.5625 9.7 pt off Size: 50.5605x7.5625 9.8 pt on Size: 50.5605x7.5625 9.8 pt off Size: 50.5605x7.5625 9.9 pt on Size: 50.5605x7.5625 9.9 pt off Size: 50.5605x7.5625 10.0 pt on Size: 50.5605x7.5625 10.0 pt off Size: 50.5605x7.5625 with PDF, metrics on or off makes no difference. But the font size changes are in steps. </tt> <div class="moz-cite-prefix">On 29.09.18 08:12, Uli Schlachter wrote: </div> <blockquote type="cite" cite="mid:958b7937-857c-dbf7-db79-999e6c038a88@znc.in"> <pre wrap="">Hi, On 28.09.2018 14:10, Alois Treindl wrote: </pre> <blockquote type="cite"> <pre wrap="">I noticed that cairo does not allow me to set a precise font size, like 9.4 pt or 9.7 pt. What I get is exactly the same font size, for a range of font sizes. </pre> </blockquote> <pre wrap=""> Try disabling metrics hinting via CAIRO_HINT_METRICS_OFF. See the attached example program. Per the docs, this metrics hinting quantizises font metrics so that they are integer values in device space, i.e. does exactly what you are trying to get rid of. You might also want to do cairo_font_options_set_hint_style(opt, CAIRO_HINT_STYLE_NONE), depending on, well, if you want the font outlines to be hinted or not. Cheers, Uli </pre> </blockquote> </body> </html>