diff options
author | Matthias Clasen <mclasen@redhat.com> | 2021-03-18 00:09:58 -0400 |
---|---|---|
committer | Matthias Clasen <mclasen@redhat.com> | 2021-03-18 00:11:12 -0400 |
commit | 2214326a9669af950593da08c98505c62e27974a (patch) | |
tree | 3f670f6ca980acc52da591ffa63dc30df7d95614 | |
parent | 7e7ceb2425201bb4c7be3dcd0864d3da9632f9ef (diff) | |
download | pango-2214326a9669af950593da08c98505c62e27974a.tar.gz |
context: Cache metrics for the current fontcache-context-metrics
GTK calls pango_context_get_metrics() frequently to
determine character widths and alignments, and does not
expect this to involve expensive layout operations.
-rw-r--r-- | pango/pango-context.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/pango/pango-context.c b/pango/pango-context.c index 1db11a1c..ccaa1bac 100644 --- a/pango/pango-context.c +++ b/pango/pango-context.c @@ -63,6 +63,8 @@ struct _PangoContext PangoFontMap *font_map; + PangoFontMetrics *metrics; + gboolean round_glyph_positions; }; @@ -121,6 +123,9 @@ pango_context_finalize (GObject *object) if (context->matrix) pango_matrix_free (context->matrix); + if (context->metrics) + pango_font_metrics_unref (context->metrics); + G_OBJECT_CLASS (pango_context_parent_class)->finalize (object); } @@ -1783,6 +1788,11 @@ pango_context_get_metrics (PangoContext *context, if (!language) language = context->language; + if (desc == context->font_desc && + language == context->language && + context->metrics != NULL) + return pango_font_metrics_ref (context->metrics); + current_fonts = pango_font_map_load_fontset (context->font_map, context, desc, language); metrics = get_base_metrics (current_fonts); @@ -1797,6 +1807,10 @@ pango_context_get_metrics (PangoContext *context, g_object_unref (current_fonts); + if (desc == context->font_desc && + language == context->language) + context->metrics = pango_font_metrics_ref (metrics); + return metrics; } @@ -1806,6 +1820,8 @@ context_changed (PangoContext *context) context->serial++; if (context->serial == 0) context->serial++; + + g_clear_pointer (&context->metrics, pango_font_metrics_unref); } /** |