mirror of
https://github.com/appgurueu/modlib.git
synced 2024-08-19 21:04:13 +02:00
80 lines
2.1 KiB
Lua
80 lines
2.1 KiB
Lua
local cd = {}
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local function calc_dims(self, get_file_dims)
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return assert(cd[self.type])(self, get_file_dims)
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end
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function cd:file(d)
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return d(self.filename)
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end
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do
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local function base_dim(self, get_dims) return calc_dims(self.base, get_dims) end
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cd.opacity = base_dim
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cd.invert = base_dim
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cd.brighten = base_dim
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cd.noalpha = base_dim
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cd.makealpha = base_dim
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cd.lowpart = base_dim
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cd.mask = base_dim
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cd.colorize = base_dim
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end
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do
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local function wh(self) return self.w, self.h end
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cd.resize = wh
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cd.combine = wh
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end
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function cd:overlay(get_dims)
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local base_w, base_h = calc_dims(self.base, get_dims)
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local over_w, over_h = calc_dims(self.over, get_dims)
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return math.max(base_w, over_w), math.max(base_h, over_h)
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end
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function cd:transform(get_dims)
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if self.rotation_deg % 180 ~= 0 then
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local base_w, base_h = calc_dims(self.base, get_dims)
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return base_h, base_w
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end
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return calc_dims(self.base, get_dims)
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end
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do
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local math_clamp = modlib.math.clamp
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local function next_pow_of_2(x)
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-- I don't want to use a naive 2^ceil(log(x)/log(2)) due to possible float precision issues.
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local m, e = math.frexp(x) -- x = _*2^e, _ in [0.5, 1)
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if m == 0.5 then e = e - 1 end -- x = 2^(e-1)
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return math.ldexp(1, e) -- 2^e, premature optimization here we go
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end
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function cd:inventorycube(get_dims)
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local top_w, top_h = calc_dims(self.top, get_dims)
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local left_w, left_h = calc_dims(self.left, get_dims)
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local right_w, right_h = calc_dims(self.right, get_dims)
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local d = math_clamp(next_pow_of_2(math.max(top_w, top_h, left_w, left_h, right_w, right_h)), 2, 64)
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return d, d
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end
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end
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do
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local function frame_dims(self, get_dims)
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local base_w, base_h = calc_dims(self.base, get_dims)
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return base_w, math.floor(base_h / self.framecount)
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end
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cd.verticalframe = frame_dims
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cd.crack = frame_dims
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cd.cracko = frame_dims
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end
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function cd:sheet(get_dims)
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local base_w, base_h = calc_dims(self.base, get_dims)
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return math.floor(base_w / self.w), math.floor(base_h / self.h)
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end
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function cd:png()
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local png = modlib.minetest.decode_png(modlib.text.inputstream(self.data))
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return png.width, png.height
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end
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return calc_dims |