From 5fa756996028fc7ce6be943f3e47c10231dbed0d Mon Sep 17 00:00:00 2001
From: ubq323 <ubq323@ubq323.website>
Date: Sat, 6 Aug 2022 22:56:33 +0100
Subject: img

---
 img/shitty_disp.lua | 116 ++--------------------------------------------------
 1 file changed, 3 insertions(+), 113 deletions(-)

(limited to 'img/shitty_disp.lua')

diff --git a/img/shitty_disp.lua b/img/shitty_disp.lua
index 8bd1b61..ea9681b 100644
--- a/img/shitty_disp.lua
+++ b/img/shitty_disp.lua
@@ -1,116 +1,6 @@
 -- bad displayment thing
-
-local function color_dist(c1,c2)
-	local total = 0
-	for i=1,3 do total = total + (c1[i]-c2[i])^2 end
-	return total
-end
-
-local function closest_palette_color(R,c)
-	local closest = nil
-	local closest_dist = 99999999
-	for i=0,15 do
-		local pc = {R.getPaletteColor(2^i)}
-		local dist = color_dist(pc,c)
-		if dist < closest_dist then
-			closest = 2^i
-			closest_dist = dist 
-		end
-	end
-	return closest
-end
-
-local function average_color(pxlist)
-	local count = #pxlist
-	local tr,tg,tb = 0,0,0
-	for _,px in ipairs(pxlist) do
-		tr = tr + px[1]
-		tg = tg + px[2]
-		tb = tb + px[3]
-	end
-	return {tr/count,tg/count,tb/count}
-end
-
-local function sortby_r(pxlist) table.sort(pxlist,function(a,b) return a[1]<b[1] end) end
-local function sortby_g(pxlist) table.sort(pxlist,function(a,b) return a[2]<b[2] end) end
-local function sortby_b(pxlist) table.sort(pxlist,function(a,b) return a[3]<b[3] end) end
-
-local function median_cut(pxlist,remaining)
-	remaining = remaining or 4
-	if remaining <= 0 then
-		return {average_color(pxlist)}
-	end
-	local maxr,maxg,maxb = -1,-1,-1
-	local minr,ming,minb = 999,999,999
-	local max,min = math.max,math.min
-	for _,px in ipairs(pxlist) do
-		maxr = max(maxr,px[1])
-		maxg = max(maxg,px[2])
-		maxb = max(maxb,px[3])
-		minr = min(minr,px[1])
-		ming = min(ming,px[2])
-		minb = min(minb,px[3])
-	end
-	local ranger,rangeg,rangeb = maxr-minr,maxg-ming,maxb-minb
-	if ranger > rangeg then
-		if ranger > rangeb then
-			-- red
-			sortby_r(pxlist)
-		else
-			-- blue
-			sortby_b(pxlist)
-		end
-	else
-		if rangeg > rangeb then
-			-- green
-			sortby_g(pxlist)
-		else
-			-- blue
-			sortby_b(pxlist)
-		end
-	end
-	local count = #pxlist
-	local hcount = math.floor(count/2)
-
-	local lhalf,uhalf = {},{}
-	for i=1,hcount do
-		lhalf[i] = pxlist[i]
-	end
-	for i=hcount+1,count do
-		uhalf[i-hcount] = pxlist[i]
-	end
-	
-	local lcols = median_cut(lhalf,remaining-1)
-	local ucols = median_cut(uhalf,remaining-1)
-
-	for i=1,#ucols do table.insert(lcols,ucols[i]) end
-	return lcols
-end
-
-local function reset_palette(R)
-	for i=0,15 do
-		local cx = 2^i
-		R.setPaletteColor(cx,term.nativePaletteColor(cx))
-	end
-end
-
-local function improve_palette(R,img,w,h,imgx,imgy)
-	local pxlist = {}
-	local idx=1
-	for px=imgx,imgx+w-1 do
-		for py=imgy,imgy+h-1 do
-			pxlist[idx] = img[py][px]
-			idx = idx + 1
-		end
-	end
-	local palette = median_cut(pxlist)
-	assert(#palette==16,#palette.." doesn't equal 16")
-	for i=0,15 do
-		local pc = palette[i+1]
-		R.setPaletteColor(2^i,table.unpack(pc))
-	end
-end
-	
+local disp_common = require("disp_common")
+local improve_palette,closest_palette_color = disp_common.improve_palette,disp_common.closest_palette_color
 
 
 local function disp(R,img,scrx,scry,w,h,imgx,imgy)
@@ -134,4 +24,4 @@ local function disp(R,img,scrx,scry,w,h,imgx,imgy)
 	end
 end
 
-return {disp=disp,color_dist=color_dist,closest_palette_color=closest_palette_color,reset_palette=reset_palette}
+return {disp=disp}
-- 
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