Export tileset

Export Tileset.lua

if TilesetMode == nil then return app.alert "Use Aseprite v1.3"  end

local lay = app.activeLayer
if not lay.isTilemap then return app.alert "No active tilemap layer" end

local tileset = lay.tileset

local dlg = Dialog("Export Tileset")
dlg:file{ id="file", label="Export to File:", save=true, focus=true,
          filename=app.fs.joinPath(app.fs.filePath(lay.sprite.filename),
                                   lay.name .. ".png") }
   :label{ label="# Tiles", text=tostring(#tileset) }
   :separator()
   :button{ text="&Export", focus=true, id="ok" }
   :button{ text="&Cancel" }
   :show()

local data = dlg.data
if data.ok then
  local spec = lay.sprite.spec
  local grid = tileset.grid
  local size = grid.tileSize
  spec.width = size.width
  spec.height = size.height * #tileset
  local image = Image(spec)
  image:clear()
  for i = 0,#tileset-1 do
    local tile = tileset:getTile(i)
    image:drawImage(tile, 0, i*size.height)
  end
  image:saveAs{ filename=data.file, palette=lay.sprite.palettes[1] }

  -- Open exported file?
  --app.open(data.file)
end

Useful script, thanks! But it exports images with indexed colors as black-white.

Is there a way to fix the palette problem? I'm currently facing an engine limitation where my sprites larger than 64x64 must be composed of different pieces (Eg: a 128x128 sprite must be made from 4 64x64 smaller sprites arranged).

And the palette problem is crucial: The engine only supports 16 colours per sprite...

I've just updated the script to export the correct palette. I'm seeing another issue now that the exported file contains the first palette entry totally transparent.

@sigmasoldi3r could you check if this script now works for you?

It works! The palette is exported now, thanks!