cairo samples

 arc
 arc_negative
 clip
 clip_image
 curve_rectangle
 curve_to
 fill_and_stroke2
 fill_and_stroke
 gradient
 image
 imagepattern
 libsvg
 operator_add
 operator_atop
 operator_atop_reverse
 operator_in
 operator_in_reverse
 operator_out
 operator_out_reverse
 operator_over
 operator_over_reverse
 operator_saturate
 operator_xor
 path
 set_line_cap
 set_line_join
 text_align_center
 text
 text_extents
 xxx_clip_rectangle
 xxx_dash
 xxx_long_lines
 xxx_multi_segment_caps
 xxx_self_intersect
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cairo_set_line_width (cr, 0.16);
cairo_move_to (cr, 0.3, 0.33);
cairo_rel_line_to (cr, 0.2, -0.2);
cairo_rel_line_to (cr, 0.2, 0.2);
cairo_set_line_join (cr, CAIRO_LINE_JOIN_MITER); /* default */
cairo_stroke (cr);

cairo_move_to (cr, 0.3, 0.63);
cairo_rel_line_to (cr, 0.2, -0.2);
cairo_rel_line_to (cr, 0.2, 0.2);
cairo_set_line_join (cr, CAIRO_LINE_JOIN_BEVEL);
cairo_stroke (cr);

cairo_move_to (cr, 0.3, 0.93);
cairo_rel_line_to (cr, 0.2, -0.2);
cairo_rel_line_to (cr, 0.2, 0.2);
cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
cairo_stroke (cr);