Körperbewegung

mods/modlib/minetest/texmod/calc_dims.lua

@@ -0,0 +1,97 @@
+local cd = {}
+
+local function calc_dims(self, get_file_dims)
+	return assert(cd[self.type])(self, get_file_dims)
+end
+
+function cd:file(d)
+	return d(self.filename)
+end
+
+do
+	local function base_dim(self, get_dims) return calc_dims(self.base, get_dims) end
+	cd.opacity = base_dim
+	cd.invert = base_dim
+	cd.brighten = base_dim
+	cd.noalpha = base_dim
+	cd.makealpha = base_dim
+	cd.lowpart = base_dim
+	cd.mask = base_dim
+	cd.multiply = base_dim
+	cd.colorize = base_dim
+	cd.colorizehsl = base_dim
+	cd.hsl = base_dim
+	cd.screen = base_dim
+	cd.contrast = base_dim
+end
+
+do
+	local function wh(self) return self.w, self.h end
+	cd.resize = wh
+	cd.combine = wh
+end
+
+function cd:fill(get_dims)
+	if self.base then return calc_dims(self.base, get_dims) end
+	return self.w, self.h
+end
+
+do
+	local function upscale_to_higher_res(self, get_dims)
+		local base_w, base_h = calc_dims(self.base, get_dims)
+		local over_w, over_h = calc_dims(self.over, get_dims)
+		if base_w * base_h > over_w * over_h then
+			return base_w, base_h
+		end
+		return over_w, over_h
+	end
+	cd.blit = upscale_to_higher_res
+	cd.hardlight = upscale_to_higher_res
+end
+
+function cd:transform(get_dims)
+	if self.rotation_deg % 180 ~= 0 then
+		local base_w, base_h = calc_dims(self.base, get_dims)
+		return base_h, base_w
+	end
+	return calc_dims(self.base, get_dims)
+end
+
+do
+	local math_clamp = modlib.math.clamp
+	local function next_pow_of_2(x)
+		-- I don't want to use a naive 2^ceil(log(x)/log(2)) due to possible float precision issues.
+		local m, e = math.frexp(x) -- x = _*2^e, _ in [0.5, 1)
+		if m == 0.5 then e = e - 1 end -- x = 2^(e-1)
+		return math.ldexp(1, e) -- 2^e, premature optimization here we go
+	end
+	function cd:inventorycube(get_dims)
+		local top_w, top_h = calc_dims(self.top, get_dims)
+		local left_w, left_h = calc_dims(self.left, get_dims)
+		local right_w, right_h = calc_dims(self.right, get_dims)
+		local d = math_clamp(next_pow_of_2(math.max(top_w, top_h, left_w, left_h, right_w, right_h)), 2, 64)
+		return d, d
+	end
+end
+
+do
+	local function frame_dims(self, get_dims)
+		local base_w, base_h = calc_dims(self.base, get_dims)
+		return base_w, math.floor(base_h / self.framecount)
+	end
+	cd.verticalframe = frame_dims
+	cd.crack = frame_dims
+	cd.cracko = frame_dims
+end
+
+function cd:sheet(get_dims)
+	local base_w, base_h = calc_dims(self.base, get_dims)
+	return math.floor(base_w / self.w), math.floor(base_h / self.h)
+end
+
+function cd:png()
+	local png = modlib.minetest.decode_png(modlib.text.inputstream(self.data))
+	return png.width, png.height
+end
+
+return calc_dims