77 lines
2.9 KiB
C
77 lines
2.9 KiB
C
// 11 march 2018
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#include "uipriv_unix.h"
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#include "attrstr.h"
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static const PangoStyle pangoItalics[] = {
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[uiTextItalicNormal] = PANGO_STYLE_NORMAL,
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[uiTextItalicOblique] = PANGO_STYLE_OBLIQUE,
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[uiTextItalicItalic] = PANGO_STYLE_ITALIC,
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};
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static const PangoStretch pangoStretches[] = {
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[uiTextStretchUltraCondensed] = PANGO_STRETCH_ULTRA_CONDENSED,
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[uiTextStretchExtraCondensed] = PANGO_STRETCH_EXTRA_CONDENSED,
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[uiTextStretchCondensed] = PANGO_STRETCH_CONDENSED,
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[uiTextStretchSemiCondensed] = PANGO_STRETCH_SEMI_CONDENSED,
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[uiTextStretchNormal] = PANGO_STRETCH_NORMAL,
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[uiTextStretchSemiExpanded] = PANGO_STRETCH_SEMI_EXPANDED,
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[uiTextStretchExpanded] = PANGO_STRETCH_EXPANDED,
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[uiTextStretchExtraExpanded] = PANGO_STRETCH_EXTRA_EXPANDED,
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[uiTextStretchUltraExpanded] = PANGO_STRETCH_ULTRA_EXPANDED,
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};
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// for the most part, pango weights correlate to ours
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// the differences:
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// - Book — libui: 350, Pango: 380
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// - Ultra Heavy — libui: 950, Pango: 1000
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// TODO figure out what to do about this misalignment
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PangoWeight uiprivWeightToPangoWeight(uiTextWeight w)
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{
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return (PangoWeight) w;
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}
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PangoStyle uiprivItalicToPangoStyle(uiTextItalic i)
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{
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return pangoItalics[i];
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}
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PangoStretch uiprivStretchToPangoStretch(uiTextStretch s)
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{
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return pangoStretches[s];
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}
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PangoFontDescription *uiprivFontDescriptorToPangoFontDescription(const uiFontDescriptor *uidesc)
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{
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PangoFontDescription *desc;
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desc = pango_font_description_new();
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pango_font_description_set_family(desc, uidesc->Family);
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// see https://developer.gnome.org/pango/1.30/pango-Fonts.html#pango-font-description-set-size and https://developer.gnome.org/pango/1.30/pango-Glyph-Storage.html#pango-units-from-double
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pango_font_description_set_size(desc, pango_units_from_double(uidesc->Size));
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pango_font_description_set_weight(desc, uiprivWeightToPangoWeight(uidesc->Weight));
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pango_font_description_set_style(desc, uiprivItalicToPangoStyle(uidesc->Italic));
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pango_font_description_set_stretch(desc, uiprivStretchToPangoStretch(uidesc->Stretch));
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return desc;
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}
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void uiprivFontDescriptorFromPangoFontDescription(PangoFontDescription *pdesc, uiFontDescriptor *uidesc)
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{
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PangoStyle pitalic;
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PangoStretch pstretch;
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uidesc->Family = uiUnixStrdupText(pango_font_description_get_family(pdesc));
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pitalic = pango_font_description_get_style(pdesc);
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// TODO reverse the above misalignment if it is corrected
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uidesc->Weight = pango_font_description_get_weight(pdesc);
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pstretch = pango_font_description_get_stretch(pdesc);
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// absolute size does not matter because, as above, 1 device unit == 1 cairo point
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uidesc->Size = pango_units_to_double(pango_font_description_get_size(pdesc));
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for (uidesc->Italic = uiTextItalicNormal; uidesc->Italic < uiTextItalicItalic; uidesc->Italic++)
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if (pangoItalics[uidesc->Italic] == pitalic)
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break;
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for (uidesc->Stretch = uiTextStretchUltraCondensed; uidesc->Stretch < uiTextStretchUltraExpanded; uidesc->Stretch++)
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if (pangoStretches[uidesc->Stretch] == pstretch)
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break;
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}
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