/
mksheet.lua
82 lines (73 loc) · 2.73 KB
/
mksheet.lua
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--[[ Copyright (c) 2009 Peter "Corsix" Cawley
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE. --]]
if not ... then
print "Usage: lua mksheet.lua <spec-file>"
print "Converts a number of bitmaps into a sprite sheet using the given spec"
return
end
package.path = (debug.getinfo(1, "S").source:match("@(.*[" .. package.config
:sub(1, 1) .. "])") or "") .. "lib_" .. package.config:sub(5, 5)
.. ".lua" .. package.config:sub(3, 3) .. package.path
require "bmp"
require "spritesheet"
local specfile = ...
specfile = assert(loadfile(specfile))
local spec = {}
setfenv(specfile, spec)()
assert(type(spec.sprites) == "table", "spec is missing sprite list")
local required_fields = {
palette = {
["from bitmap"] = true,
},
complex = {
[true] = true,
-- [false] = true, -- Not yet supported
},
rnc = {
-- [true] = true, -- Not yet supported
[false] = true,
},
output_tab = true,
output_dat = true,
}
for field, options in pairs(required_fields) do
assert(spec[field] ~= nil, "spec is missing '" .. field .. "' field")
if options ~= true then
assert(options[spec[field]], "spec field '" .. field .. "' is invalid")
end
end
local ss = spritesheet.open(spec.output_tab, spec.output_dat, spec.complex)
for i = 0, table.maxn(spec.sprites) do
local filename = spec.sprites[i]
if not filename then
ss:writeDummy()
else
local function err(msg, ...)
error("Error processing " .. filename .. ":\n" .. msg:format(...))
end
local bitmap, e = bmp.open(filename)
if not bitmap then
err(e)
end
local width, height = bitmap.width, bitmap.height
if width > 0xFF or height > 0xFF then
err "Image too big (maximum size is 255x255)"
end
ss:write(width, height, bitmap:getPixels())
end
end
ss:close()