diff options
Diffstat (limited to 'pango')
| -rw-r--r-- | pango/pangofc-font.c | 48 |
1 files changed, 45 insertions, 3 deletions
diff --git a/pango/pangofc-font.c b/pango/pangofc-font.c index 7c38ab76..d9b6fa8a 100644 --- a/pango/pangofc-font.c +++ b/pango/pangofc-font.c @@ -491,9 +491,30 @@ pango_fc_font_create_base_metrics_for_context (PangoFcFont *fcfont, return metrics; } -/* This function is cut-and-pasted into pangocairo-fcfont.c - it might be - * better to add a virtual fcfont->create_context (font). - */ +static int +max_glyph_width (PangoLayout *layout) +{ + int max_width = 0; + GSList *l, *r; + + for (l = pango_layout_get_lines_readonly (layout); l; l = l->next) + { + PangoLayoutLine *line = l->data; + + for (r = line->runs; r; r = r->next) + { + PangoGlyphString *glyphs = ((PangoGlyphItem *)r->data)->glyphs; + int i; + + for (i = 0; i < glyphs->num_glyphs; i++) + if (glyphs->glyphs[i].geometry.width > max_width) + max_width = glyphs->glyphs[i].geometry.width; + } + } + + return max_width; +} + static PangoFontMetrics * pango_fc_font_get_metrics (PangoFont *font, PangoLanguage *language) @@ -538,6 +559,27 @@ pango_fc_font_get_metrics (PangoFont *font, info->metrics = pango_fc_font_create_base_metrics_for_context (fcfont, context); + { /* Compute derived metrics */ + PangoLayout *layout; + PangoRectangle extents; + const char *sample_str = pango_language_get_sample_string (language); + PangoFontDescription *desc = pango_font_describe_with_absolute_size (font); + + layout = pango_layout_new (context); + pango_layout_set_font_description (layout, desc); + pango_font_description_free (desc); + + pango_layout_set_text (layout, sample_str, -1); + pango_layout_get_extents (layout, NULL, &extents); + + info->metrics->approximate_char_width = extents.width / pango_utf8_strwidth (sample_str); + + pango_layout_set_text (layout, "0123456789", -1); + info->metrics->approximate_digit_width = max_glyph_width (layout); + + g_object_unref (layout); + } + g_object_unref (context); g_object_unref (fontmap); } |