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tmxsaver.lua
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tmxsaver.lua
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local path = (...):match('^.+[%.\\/]') or ''
local map = require(path..'map')
local isomap = require(path..'isomap')
-- ==============================================
-- FORMAT PROPERTIES TABLE
-- ==============================================
local ok_type = {
boolean = true,
string = true,
number = true,
}
local function prepareTableProperties(properties)
if properties then
local formatted = {__element = 'properties'}
for name,value in pairs(properties) do
if ok_type[type(name)] and ok_type[type(value)] then
local property = {
__element= 'property',
name = tostring(name),
value = tostring(value),
}
table.insert(formatted,property)
end
end
return formatted
end
end
-- ==============================================
-- FORMAT TILESET/TILE LAYER/OBJECT GROUP
-- ==============================================
local makeAndInsertTileset = function(layer,atlasDone,tilesets,firstgid)
local atlas = layer:getAtlas()
if not atlasDone[atlas] then
local tw,th = atlas:getqSize()
local _,_,aw = atlas:getViewport()
local iw,ih = atlas:getImageSize()
local image = {
__element= 'image',
source = layer:getImageSource(),
width = iw,
height = ih,
}
local tiles = {}
local rows,cols = atlas:getRows(),atlas:getColumns()
for y = 1,rows do
for x = 1,cols do
local index = (y-1)*cols+x
local prop = atlas:getqProperty(index)
if type(prop) == 'table' then
local id = index-1
local tile = {
__element = 'tile',
id = id;
prepareTableProperties( prop ),
}
table.insert(tiles,tile)
end
end
end
local to = atlas.tileoffset
local tileoffset = to and {
__element= 'tileoffset',
x = to.x,
y = to.y
}
local tileset= {
__element = 'tileset',
firstgid = firstgid,
name = layer.atlas:getName() or ('tileset '..(#tilesets+1)),
tilewidth = tw,
tileheight= th,
spacing = atlas:getSpacings(),
margin = (iw-aw)/2,
prepareTableProperties(atlas.properties),
-- tile
}
table.insert(tileset,tileoffset)
table.insert(tileset,image)
for i,tile in ipairs(tiles) do
table.insert(tileset,tile)
end
table.insert(tilesets,tileset)
atlasDone[atlas]= firstgid
local newgid = firstgid+(rows*cols)
return newgid
end
end
local normalizeAngle = function(angle)
return angle % (math.pi*2)
end
local isEqualAngle = function(angle1,angle2)
return math.abs(angle1-angle2) < 0.02
end
local getFlipBits = function(x,y,layer)
local angle = normalizeAngle( layer:getAngle(x,y) )
local iszero = isEqualAngle(angle,0)
local flipx,flipy = layer:getFlip(x,y)
local xbit,ybit,diagbit= 0,0,0
if flipx and flipy then flipx,flipy = false; angle = normalizeAngle( angle+math.pi ) end
-- see tmxloader note for bit flip
if iszero then
xbit,ybit = flipx and 2^31 or xbit,flipy and 2^30 or ybit
diagbit = 0
else
if isEqualAngle(angle,math.pi)then
xbit = not flipx and 2^31 or xbit
ybit = not flipy and 2^30 or ybit
diagbit = 0
elseif isEqualAngle(angle,math.pi/2) then
xbit = 2^31
ybit = 0
diagbit = 2^29
if flipx then ybit = 2^30 end
if flipy then xbit = 0 end
elseif isEqualAngle(angle,3*math.pi/2) then
xbit = 0
ybit = 2^30
diagbit = 2^29
if flipx then ybit = 0 end
if flipy then xbit = 2^31 end
end
end
return xbit+ybit+diagbit
end
local makeAndInsertTileLayer = function(drawlist,i,layer,layers,atlasDone)
local data = layer:export(2,true)
local firstgid= atlasDone[ layer:getAtlas() ]
for y,t in ipairs(data) do
for x,index in ipairs(t) do
if index ~= 0 then
local flipbits= getFlipBits(x,y,layer)
local gid = firstgid + (index - 1) + flipbits
data[y][x] = gid
end
end
end
local preparedData = {__element = 'data',encoding = 'csv'; data}
local formattedlayer = {
__element= 'layer',
name = layer:getName() or ('layer '..i),
visible = drawlist:isDrawable(layer:getName()) and 1 or 0,
data = preparedData,
width = data.width,
height = data.height,
opacity = layer.opacity,
prepareTableProperties(layer.properties),
}
table.insert(formattedlayer,preparedData)
table.insert(layers,formattedlayer)
end
local makeAndInsertObjGroup = function(layer,layers)
local copy = {
__element = 'objectgroup',
name = layer.name,
color = layer.color,
x = layer.x,
y = layer.y,
width = layer.width,
height = layer.height,
opacity = layer.opacity,
visible = layer.visible,
prepareTableProperties(layer.properties),
-- object
}
for _,obj in ipairs(layer.objects) do
local newobj = {
__element= 'object',
name = obj.name,
type = obj.type,
x = obj.x,
y = obj.y,
width = obj.width,
height = obj.height,
rotation = obj.rotation,
gid = obj.gid,
visible = obj.visible;
prepareTableProperties(obj.properties),
-- type
}
local type = obj.polygon and {__element = 'polygon'} or
obj.polyline and {__element = 'polyline'}
or obj.ellipse and {__element = 'ellipse'}
if obj.polyline or obj.polygon then
local points = (obj.polygon or obj.polyline).points
local str = ''
for i = 1,#points,2 do
str = str..points[i]..','..points[i+1]..' '
end
type.points = str
end
table.insert(newobj,type)
table.insert(copy,newobj)
end
table.insert(layers,copy)
end
local function equalizeLayerSize(tmxmap,layers)
local mw,mh = 0,0
for i,layer in ipairs(layers) do
mw,mh = math.max(layer.width,mw),math.max(layer.height,mh)
end
tmxmap.width,tmxmap.height = mw,mh
for i,layer in ipairs(layers) do
layer.width = mw; layer.height = mh
if layer.__element == 'layer' then
local data = layer.data[1]
local w = #data[1]
local extra_row = {}
for i = 1,mw do
table.insert(extra_row,0)
end
local rows = {}
for y = 1,mh do
local row = data[y]
if not row then
row = extra_row
else
for x = mw,w+1,-1 do
row[x] = 0
end
end
data[y] = extra_row
table.insert( rows, table.concat(row,',') )
end
layer.data[1] = table.concat( rows, ',\n' )
layer.data = nil
end
end
end
-- ==============================================
-- PREPARE AND SAVE
-- ==============================================
local function prepareTable(drawlist,path)
local orientation = 'orthogonal'
local dummylayer
for i,layer in pairs(drawlist.layers) do
local meta = getmetatable(layer)
if meta then
local class = meta.__index
if class == isomap then orientation = 'isometric' dummylayer = layer end
if class == map then dummylayer = layer end
end
end
local tw,th = dummylayer:getTileSize()
local tmxmap = {
__element = 'map',
version = '1.0',
orientation = orientation,
width = 0,
height = 0,
tilewidth = tw,
tileheight = th;
prepareTableProperties(drawlist.properties)
-- tileset
-- layer
}
local atlasDone = {}
local tilesets = {}
local layers = {}
local firstgid = 1
for i,layer in ipairs(drawlist.layers) do
local meta = getmetatable(layer)
local class = meta and meta.__index
if class == map or class == isomap then
local newgid = makeAndInsertTileset(layer,atlasDone,tilesets,firstgid)
makeAndInsertTileLayer(drawlist,i,layer,layers,atlasDone)
firstgid = newgid or firstgid
elseif layer.__element == 'objectgroup' then
makeAndInsertObjGroup(layer,layers)
elseif layer.__element == 'imagelayer' then
local imagelayer = {
__element= 'imagelayer',
name = layer.name,
width = layer.width,
height = layer.height,
{
__element= 'image',
source = layer.source,
trans = layer.trans,
},
prepareTableProperties(layer.properties),
}
table.insert(layers,imagelayer)
end
end
equalizeLayerSize(tmxmap,layers)
for i,tileset in ipairs(tilesets) do
table.insert(tmxmap,tileset)
end
for i,layer in ipairs(layers) do
table.insert(tmxmap,layer)
end
return tmxmap
end
local saveToXML = function(t,filename)
local file = love.filesystem.newFile(filename)
file:open 'w'
file:write '<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n'
local recursive
recursive = function(t,level)
local element = t.__element
local tabs = string.rep('\t',level)
file:write (tabs..'<'..element)
-- attributes
for i,v in pairs(t) do
local itype = type(i)
local vtype = type(v)
if itype ~= 'number' and vtype ~= 'table' and i ~= '__element' then
file:write( string.format( ' %s=%q ',tostring(i),tostring(v) ) )
end
end
if t[1] then
file:write ('>\n')
-- subelements/text
for i,v in ipairs(t) do
local vtype = type(v)
if vtype == 'table' then
recursive(v,level+1)
else
file:write(tostring(v)..'\n')
end
end
file:write (tabs..'</'..element..'>\n')
else
file:write ('/>\n')
end
end
recursive(t,0)
file:close()
end
return function(drawlist,path)
saveToXML( prepareTable(drawlist,path),path )
end