DiaFont*
dia_font_new_from_style(DiaFontStyle style, real height)
{
DiaFont* retval;
/* in the future we could establish Dia's own default font
* matching to be as (font-)system independent as possible.
* For now fall back to Pangos configuration --hb
*/
PangoFontDescription* pfd = pango_font_description_new();
dia_pfd_set_family(pfd,DIA_FONT_STYLE_GET_FAMILY(style));
dia_pfd_set_weight(pfd,DIA_FONT_STYLE_GET_WEIGHT(style));
dia_pfd_set_slant(pfd,DIA_FONT_STYLE_GET_SLANT(style));
dia_pfd_set_height(pfd,height);
retval = DIA_FONT(g_object_new(DIA_TYPE_FONT, NULL));
retval->pfd = pfd;
_dia_font_adjust_size (retval, height, FALSE);
retval->legacy_name = NULL;
return retval;
}
/*!
* In Dia a font is usually referred to by it's (line-) height, not it's size.
*
* This methods "calculates" the latter from the former. This used to be some magic factor of 0.7 which did not
* solve the resolution dependencance of the former calculation. In fact there is new magic factor now because
* really calculating the font size from the height would involve two font loads which seem to be two expensive.
*/
static void
_dia_font_adjust_size (DiaFont *font, real height, gboolean recalc_alwways)
{
if (font->height != height || !font->metrics || recalc_alwways) {
PangoFont *loaded;
dia_pfd_set_height (font->pfd, height);
/* need to load a font to get it's metrics */
loaded = font->loaded;
font->loaded = pango_context_load_font(dia_font_get_context(), font->pfd);
if (loaded) /* drop old reference */
g_object_unref (loaded);
if (font->metrics)
pango_font_metrics_unref (font->metrics);
/* caching metrics */
font->metrics = pango_font_get_metrics (font->loaded, NULL);
font->height = height;
}
}
