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--[[
font_api mod for Minetest - Library creating textures with fonts and text
(c) Pierre-Yves Rollo
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
--]]
-- Integration with display API
if minetest.get_modpath("display_api") then
--- Standard on_display_update entity callback.
-- Node should have properly configured display_entity.
-- @param pos Node position
-- @param objref Object reference of entity
font_api.on_display_update = function (pos, objref)
local meta = minetest.get_meta(pos)
local ndef = minetest.registered_nodes[minetest.get_node(pos).name]
local entity = objref:get_luaentity()
if not entity or not ndef.display_entities[entity.name] then
return
end
local def = ndef.display_entities[entity.name]
local font = font_api.get_font(meta:get_string("font") ~= ""
and meta:get_string("font") or def.font_name)
local text = meta:get_string(def.meta_text or "display_text")
-- Compute entity resolution accroding to given attributes
local texturew, textureh
textureh = font:get_height(def.lines or def.maxlines or 1)
if def.columns then
if font.fixedwidth then
texturew = def.columns * font.fixedwidth
if def.aspect_ratio then
minetest.log('warning', "[font_api] 'aspect_ratio' ignored because 'columns' is specified")
end
else
minetest.log('warning', "[font_api] 'columns' ignored because '"..font.name.."' is not a fixed width font.")
end
end
if not texturew then
if not def.aspect_ratio then
minetest.log('warning', "[font_api] No 'aspect_ratio' specified, using default 1.")
end
texturew = textureh * def.size.x / def.size.y / (def.aspect_ratio or 1)
end
objref:set_properties({
textures={ font:render(text, texturew, textureh, {
lines = def.maxlines or def.lines,
halign = def.halign,
valign = def.valign,
color = def.color} ) },
visual_size = def.size,
})
end
else
font_api.on_display_update = function (pos, objref)
minetest.log('error', '[font_api] font_api.on_display_update called but display_api mod not enabled.')
end
end
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