void FontFamily_Impl::add(const FontDescription &desc, const std::string &typeface_name)
{
FontFamily_Definition definition;
definition.desc = desc.clone();
definition.typeface_name = typeface_name;
font_definitions.push_back(definition);
}
void FontFamily_Impl::add(const FontDescription &desc, DataBuffer &font_databuffer)
{
FontFamily_Definition definition;
definition.desc = desc.clone();
definition.font_databuffer = font_databuffer;
font_definitions.push_back(definition);
}
Font_Impl::Font_Impl(FontFamily &new_font_family, const FontDescription &description)
{
new_font_family.throw_if_null();
font_family = new_font_family;
selected_description = description.clone();
selected_line_height = description.get_line_height();
}
Font Font::load(Canvas &canvas, const std::string &family_name, const FontDescription &reference_desc, FontFamily &font_family, const XMLResourceDocument &doc, std::function<Resource<Sprite>(Canvas &, const std::string &)> cb_get_sprite)
{
DomElement font_element;
XMLResourceNode resource;
resource = doc.get_resource(family_name);
font_element = resource.get_element();
DomElement sprite_element = font_element.named_item("sprite").to_element();
if (!sprite_element.is_null())
{
if (!sprite_element.has_attribute("glyphs"))
throw Exception(string_format("Font resource %1 has no 'glyphs' attribute.", resource.get_name()));
if (!sprite_element.has_attribute("letters"))
throw Exception(string_format("Font resource %1 has no 'letters' attribute.", resource.get_name()));
if (!cb_get_sprite)
throw Exception(string_format("Font resource %1 requires a sprite loader callback specified.", resource.get_name()));
Resource<Sprite> spr_glyphs = cb_get_sprite(canvas, sprite_element.get_attribute("glyphs"));
const std::string &letters = sprite_element.get_attribute("letters");
int spacelen = StringHelp::text_to_int(sprite_element.get_attribute("spacelen", "-1"));
bool monospace = StringHelp::text_to_bool(sprite_element.get_attribute("monospace", "false"));
// Modify the default font metrics, if specified
float height = 0.0f;
float line_height = 0.0f;
float ascent = 0.0f;
float descent = 0.0f;
float internal_leading = 0.0f;
float external_leading = 0.0f;
if (sprite_element.has_attribute("height"))
height = StringHelp::text_to_float(sprite_element.get_attribute("height", "0"));
if (sprite_element.has_attribute("line_height"))
line_height = StringHelp::text_to_float(sprite_element.get_attribute("line_height", "0"));
if (sprite_element.has_attribute("ascent"))
ascent = StringHelp::text_to_float(sprite_element.get_attribute("ascent", "0"));
if (sprite_element.has_attribute("descent"))
descent = StringHelp::text_to_float(sprite_element.get_attribute("descent", "0"));
if (sprite_element.has_attribute("internal_leading"))
internal_leading = StringHelp::text_to_float(sprite_element.get_attribute("internal_leading", "0"));
if (sprite_element.has_attribute("external_leading"))
external_leading = StringHelp::text_to_float(sprite_element.get_attribute("external_leading", "0"));
FontMetrics font_metrics(height, ascent, descent, internal_leading, external_leading, line_height, canvas.get_pixel_ratio());
font_family.add(canvas, spr_glyphs.get(), letters, spacelen, monospace, font_metrics);
FontDescription desc = reference_desc.clone();
return Font(font_family, desc);
}
DomElement ttf_element = font_element.named_item("ttf").to_element();
if (ttf_element.is_null())
ttf_element = font_element.named_item("freetype").to_element();
if (!ttf_element.is_null())
{
FontDescription desc = reference_desc.clone();
std::string filename;
if (ttf_element.has_attribute("file"))
{
filename = PathHelp::combine(resource.get_base_path(), ttf_element.get_attribute("file"));
}
if (!ttf_element.has_attribute("typeface"))
throw Exception(string_format("Font resource %1 has no 'typeface' attribute.", resource.get_name()));
std::string font_typeface_name = ttf_element.get_attribute("typeface");
if (ttf_element.has_attribute("height"))
desc.set_height(ttf_element.get_attribute_int("height", 0));
if (ttf_element.has_attribute("average_width"))
desc.set_average_width(ttf_element.get_attribute_int("average_width", 0));
if (ttf_element.has_attribute("anti_alias"))
desc.set_anti_alias(ttf_element.get_attribute_bool("anti_alias", true));
if (ttf_element.has_attribute("subpixel"))
desc.set_subpixel(ttf_element.get_attribute_bool("subpixel", true));
if (filename.empty())
{
font_family.add(font_typeface_name, desc);
return Font(font_family, desc);
}
else
{
font_family.add(desc, filename, resource.get_file_system());
return Font(font_family, desc);
}
}
throw Exception(string_format("Font resource %1 did not have a <sprite> or <ttf> child element", resource.get_name()));
}
FontEngine_Sprite(const FontDescription &desc, FontMetrics &metrics) : font_metrics(metrics) { font_description = desc.clone(); }
Font Font_Impl::load(Canvas &canvas, const FontDescription &reference_desc, const std::string &id, const XMLResourceDocument &doc, Callback_2<Resource<Sprite>, Canvas &, const std::string &> cb_get_sprite)
{
XMLResourceNode resource = doc.get_resource(id);
std::string type = resource.get_element().get_tag_name();
if (type != "font")
throw Exception(string_format("Resource '%1' is not of type 'font'", id));
DomElement sprite_element = resource.get_element().named_item("sprite").to_element();
FontMetrics font_metrics;
if (!sprite_element.is_null())
{
if (!sprite_element.has_attribute("glyphs"))
throw Exception(string_format("Font resource %1 has no 'glyphs' attribute.", resource.get_name()));
if (!sprite_element.has_attribute("letters"))
throw Exception(string_format("Font resource %1 has no 'letters' attribute.", resource.get_name()));
Resource<Sprite> spr_glyphs = cb_get_sprite.invoke(canvas, sprite_element.get_attribute("glyphs"));
const std::string &letters = sprite_element.get_attribute("letters");
int spacelen = StringHelp::text_to_int(sprite_element.get_attribute("spacelen", "-1"));
bool monospace = StringHelp::text_to_bool(sprite_element.get_attribute("monospace", "false"));
// Modify the default font metrics, if specified
if (sprite_element.has_attribute("height"))
font_metrics.set_height(StringHelp::text_to_float(sprite_element.get_attribute("height", "0")));
if (sprite_element.has_attribute("ascent"))
font_metrics.set_ascent(StringHelp::text_to_float(sprite_element.get_attribute("ascent", "0")));
if (sprite_element.has_attribute("descent"))
font_metrics.set_descent(StringHelp::text_to_float(sprite_element.get_attribute("descent", "0")));
if (sprite_element.has_attribute("internal_leading"))
font_metrics.set_internal_leading(StringHelp::text_to_float(sprite_element.get_attribute("internal_leading", "0")));
if (sprite_element.has_attribute("external_leading"))
font_metrics.set_external_leading(StringHelp::text_to_float(sprite_element.get_attribute("external_leading", "0")));
if (sprite_element.has_attribute("average_character_width"))
font_metrics.set_average_character_width(StringHelp::text_to_float(sprite_element.get_attribute("average_character_width", "0")));
if (sprite_element.has_attribute("max_character_width"))
font_metrics.set_max_character_width(StringHelp::text_to_float(sprite_element.get_attribute("max_character_width", "0")));
font_metrics.set_weight(400.0f);
if (sprite_element.has_attribute("weight"))
font_metrics.set_weight(StringHelp::text_to_float(sprite_element.get_attribute("weight", "0")));
if (sprite_element.has_attribute("overhang"))
font_metrics.set_overhang(StringHelp::text_to_float(sprite_element.get_attribute("overhang", "0")));
font_metrics.set_digitized_aspect_x(96.0f);
if (sprite_element.has_attribute("digitized_aspect_x"))
font_metrics.set_digitized_aspect_x(StringHelp::text_to_float(sprite_element.get_attribute("digitized_aspect_x", "0")));
font_metrics.set_digitized_aspect_y(96.0f);
if (sprite_element.has_attribute("digitized_aspect_y"))
font_metrics.set_digitized_aspect_y(StringHelp::text_to_float(sprite_element.get_attribute("digitized_aspect_y", "0")));
if (sprite_element.has_attribute("italic"))
font_metrics.set_italic(StringHelp::text_to_bool(sprite_element.get_attribute("italic", "0")));
if (sprite_element.has_attribute("underlined"))
font_metrics.set_underlined(StringHelp::text_to_bool(sprite_element.get_attribute("underlined", "0")));
if (sprite_element.has_attribute("struck_out"))
font_metrics.set_struck_out(StringHelp::text_to_bool(sprite_element.get_attribute("struck_out", "0")));
if (sprite_element.has_attribute("fixed_pitch"))
font_metrics.set_fixed_pitch(StringHelp::text_to_bool(sprite_element.get_attribute("fixed_pitch", "0")));
return Font(canvas, spr_glyphs.get(), letters, spacelen, monospace, font_metrics);
}
DomElement ttf_element = resource.get_element().named_item("ttf").to_element();
if (ttf_element.is_null())
ttf_element = resource.get_element().named_item("freetype").to_element();
if (!ttf_element.is_null())
{
FontDescription desc = reference_desc.clone();
std::string filename;
if (ttf_element.has_attribute("file"))
filename = ttf_element.get_attribute("file"); desc.set_typeface_name(ttf_element.get_attribute("file"));
if (ttf_element.has_attribute("typeface"))
desc.set_typeface_name(ttf_element.get_attribute("typeface"));
if (ttf_element.has_attribute("height"))
desc.set_height(ttf_element.get_attribute_int("height", 0));
if (ttf_element.has_attribute("average_width"))
desc.set_average_width(ttf_element.get_attribute_int("average_width", 0));
if (ttf_element.has_attribute("anti_alias"))
desc.set_anti_alias(ttf_element.get_attribute_bool("anti_alias", true));
if (ttf_element.has_attribute("subpixel"))
desc.set_subpixel(ttf_element.get_attribute_bool("subpixel", true));
return Font(canvas, desc, filename);
}
throw Exception(string_format("Font resource %1 did not have a <sprite> or <ttf> child element", resource.get_name()));
}
