diff options
Diffstat (limited to 'src/widgets/gimp/ruler.cpp')
| -rw-r--r-- | src/widgets/gimp/ruler.cpp | 21 |
1 files changed, 9 insertions, 12 deletions
diff --git a/src/widgets/gimp/ruler.cpp b/src/widgets/gimp/ruler.cpp index 1d196d2b0..48ed4a5dd 100644 --- a/src/widgets/gimp/ruler.cpp +++ b/src/widgets/gimp/ruler.cpp @@ -1088,7 +1088,7 @@ sp_ruler_draw_ticks (SPRuler *ruler) gint digit_offset; gchar digit_str[2] = { '\0', '\0' }; gint text_size; - gint pos; + gdouble pos; gdouble max_size; Inkscape::Util::Unit const *unit = nullptr; SPRulerMetric ruler_metric = ruler_metric_general; /* The metric to use for this unit system */ @@ -1123,6 +1123,8 @@ sp_ruler_draw_ticks (SPRuler *ruler) cr = cairo_create (priv->backing_store); + cairo_set_line_width(cr, 1.0); + cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR); cairo_paint (cr); cairo_set_operator (cr, CAIRO_OPERATOR_OVER); @@ -1221,24 +1223,19 @@ sp_ruler_draw_ticks (SPRuler *ruler) for (cur = start; cur <= end; cur += subd_incr) { - // due to the typical values for cur, lower and increment, pos will often end up to - // be e.g. 641.50000000000; rounding behaviour is not defined in such a case (see round.h) - // and jitter will be apparent (upon redrawing some of the lines on the ruler might jump a - // by a pixel, and jump back on the next redraw). This is suppressed by adding 1e-9 (that's only one nanopixel ;-)) - pos = gint(round((cur - lower) * increment + 1e-12)); + pos = floor((cur - lower) * increment) + 0.5; if (priv->orientation == GTK_ORIENTATION_HORIZONTAL) { - cairo_rectangle (cr, - pos, height + border.top - length, - 1, length); + cairo_move_to(cr, pos, height + border.top - length); + cairo_line_to(cr, pos, height + border.top); } else { - cairo_rectangle (cr, - height + border.left - length, pos, - length, 1); + cairo_move_to(cr, height + border.left - length, pos); + cairo_line_to(cr, height + border.left , pos); } + cairo_stroke(cr); /* draw label */ double label_spacing_px = fabs(increment*(double)ruler_metric.ruler_scale[scale]/ruler_metric.subdivide[i]); |