diff options
Diffstat (limited to 'font_api/display_api.lua')
-rw-r--r-- | font_api/display_api.lua | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/font_api/display_api.lua b/font_api/display_api.lua new file mode 100644 index 0000000..2191dba --- /dev/null +++ b/font_api/display_api.lua @@ -0,0 +1,77 @@ +--[[ + font_api mod for Minetest - Library to create 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 |