mainmenu_csm/builtin/mm_textures.lua

--Minetest
--Copyright (C) 2013 sapier
--
--This program is free software; you can redistribute it and/or modify
--it under the terms of the GNU Lesser General Public License as published by
--the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
--
--You should have received a copy of the GNU Lesser General Public License along
--with this program; if not, write to the Free Software Foundation, Inc.,
--51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.


mm_texture = {}

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function mm_texture.init()
	mm_texture.defaulttexturedir = engine.get_gamepath() .. DIR_DELIM .. ".." ..
						DIR_DELIM .. "textures" .. DIR_DELIM .. "base" .. 
						DIR_DELIM .. "pack" .. DIR_DELIM
	mm_texture.basetexturedir = mm_texture.defaulttexturedir
	
	mm_texture.texturepack = engine.setting_get("texture_path")
	
	mm_texture.gameid = nil
end

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function mm_texture.update(tab,gamedetails)
	if tab ~= "singleplayer" then
		mm_texture.reset()
		return
	end

	if gamedetails == nil then
		return
	end
	
	mm_texture.update_game(gamedetails)
end

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function mm_texture.reset()
	mm_texture.gameid = nil
	local have_bg      = false
	local have_overlay = mm_texture.set_generic("overlay")
	
	if not have_overlay then
		have_bg = mm_texture.set_generic("background")
	end
	
	mm_texture.clear("header")
	mm_texture.clear("footer")
	engine.set_clouds(false)
	
	mm_texture.set_generic("footer")
	mm_texture.set_generic("header")
	
	if not have_bg and
		engine.setting_getbool("enable_clouds") then
			engine.set_clouds(true)
	end
end

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function mm_texture.update_game(gamedetails)
	if mm_texture.gameid == gamedetails.id then
		return
	end
	
	local have_bg      = false 
	local have_overlay = mm_texture.set_game("overlay",gamedetails)
	
	if not have_overlay then
		have_bg = mm_texture.set_game("background",gamedetails)
	end
	
	mm_texture.clear("header")
	mm_texture.clear("footer")
	engine.set_clouds(false)
	
	if not have_bg and
		engine.setting_getbool("enable_clouds") then
			engine.set_clouds(true)
	end
	
	mm_texture.gameid = gamedetails.id
end

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function mm_texture.clear(identifier)
	engine.set_background(identifier,"")
end

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function mm_texture.set_generic(identifier)
	--try texture pack first
	if mm_texture.texturepack ~= nil then
		local path = mm_texture.texturepack .. DIR_DELIM .."menu_" .. 
										identifier .. ".png"
		if engine.set_background(identifier,path) then
			return true
		end
	end
	
	if mm_texture.defaulttexturedir ~= nil then
		local path = mm_texture.defaulttexturedir .. DIR_DELIM .."menu_" .. 
										identifier .. ".png"
		if engine.set_background(identifier,path) then
			return true
		end
	end
	
	return false
end

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function mm_texture.set_game(identifier,gamedetails)
	
	if gamedetails == nil then
		return false
	end

	if mm_texture.texturepack ~= nil then
		local path = mm_texture.basetexturedir .. 
						gamedetails.id .. "_menu_" .. identifier .. ".png"
						
		if engine.set_background(identifier,path) then
			return true
		end
	end
	
	local path = gamedetails.path .. DIR_DELIM .."menu" .. 
									 DIR_DELIM .. identifier .. ".png"
	if engine.set_background(identifier,path) then
		return true
	end
	
	return false
end