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paletteToCel.lua
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paletteToCel.lua
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dofile("../../support/aseutilities.lua")
dofile("../../support/octree.lua")
local palTypes <const> = { "ACTIVE", "FILE" }
local colorSpaces <const> = { "LINEAR_RGB", "S_RGB", "SR_LAB_2" }
local targets <const> = { "ACTIVE", "ALL", "RANGE" }
local defaults <const> = {
target = "ACTIVE",
palType = "ACTIVE",
cvgLabRad = 175,
cvgNormRad = 120,
octCapacityBits = 4,
minCapacityBits = 2,
maxCapacityBits = 16,
printElapsed = false,
clrSpacePreset = "LINEAR_RGB"
}
---@param preset string
---@return Bounds3
local function boundsFromPreset(preset)
if preset == "CIE_LAB"
or preset == "SR_LAB_2" then
return Bounds3.lab()
else
return Bounds3.unitCubeUnsigned()
end
end
---@param clr Clr
---@return Vec3
local function clrToVec3lRgb(clr)
local lin <const> = Clr.sRgbTolRgbInternal(clr)
return Vec3.new(lin.r, lin.g, lin.b)
end
---@param clr Clr
---@return Vec3
local function clrToVec3sRgb(clr)
return Vec3.new(clr.r, clr.g, clr.b)
end
---@param clr Clr
---@return Vec3
local function clrToVec3SrLab2(clr)
local lab <const> = Clr.sRgbToSrLab2(clr)
return Vec3.new(lab.a, lab.b, lab.l)
end
---@param preset string
---@return fun(clr: Clr): Vec3
local function clrToV3FuncFromPreset(preset)
if preset == "LINEAR_RGB" then
return clrToVec3lRgb
elseif preset == "SR_LAB_2" then
return clrToVec3SrLab2
else
return clrToVec3sRgb
end
end
local dlg <const> = Dialog { title = "Palette To Cel" }
dlg:combobox {
id = "target",
label = "Target:",
option = defaults.target,
options = targets
}
dlg:newrow { always = false }
dlg:combobox {
id = "palType",
label = "Palette:",
option = defaults.palType,
options = palTypes,
onchange = function()
local args <const> = dlg.data
local palType <const> = args.palType --[[@as string]]
dlg:modify {
id = "palFile",
visible = palType == "FILE"
}
end
}
dlg:newrow { always = false }
dlg:file {
id = "palFile",
filetypes = AseUtilities.FILE_FORMATS_PAL,
open = true,
visible = defaults.palType == "FILE"
}
dlg:newrow { always = false }
dlg:combobox {
id = "clrSpacePreset",
label = "Color Space:",
option = defaults.clrSpacePreset,
options = colorSpaces,
onchange = function()
local args <const> = dlg.data
local preset <const> = args.clrSpacePreset --[[@as string]]
local isLab <const> = preset == "CIE_LAB"
or preset == "SR_LAB_2"
dlg:modify {
id = "cvgLabRad",
visible = isLab
}
dlg:modify {
id = "cvgNormRad",
visible = not isLab
}
end
}
dlg:newrow { always = false }
dlg:slider {
id = "cvgLabRad",
label = "Radius:",
min = 25,
max = 242,
value = defaults.cvgLabRad,
visible = defaults.clrSpacePreset == "CIE_LAB"
or defaults.clrSpacePreset == "SR_LAB_2"
}
dlg:newrow { always = false }
dlg:slider {
id = "cvgNormRad",
label = "Radius:",
min = 5,
max = 174,
value = defaults.cvgNormRad,
visible = defaults.clrSpacePreset ~= "CIE_LAB"
and defaults.clrSpacePreset ~= "SR_LAB_2"
}
dlg:newrow { always = false }
dlg:slider {
id = "octCapacity",
label = "Capacity (2^n):",
min = defaults.minCapacityBits,
max = defaults.maxCapacityBits,
value = defaults.octCapacityBits,
visible = defaults.clampTo256
}
dlg:newrow { always = false }
dlg:check {
id = "printElapsed",
label = "Print:",
text = "Diagnostic",
selected = defaults.printElapsed
}
dlg:newrow { always = false }
dlg:button {
id = "confirm",
text = "&OK",
focus = false,
onclick = function()
-- Begin timing the function elapsed.
local args <const> = dlg.data
local printElapsed <const> = args.printElapsed --[[@as boolean]]
local startTime <const> = os.clock()
-- Early returns.
local site <const> = app.site
local activeSprite <const> = site.sprite
if not activeSprite then
app.alert {
title = "Error",
text = "There is no active sprite."
}
return
end
local srcLayer <const> = site.layer
if not srcLayer then
app.alert {
title = "Error",
text = "There is no active layer."
}
return
end
if srcLayer.isGroup then
app.alert {
title = "Error",
text = "Group layers are not supported."
}
return
end
if srcLayer.isReference then
app.alert {
title = "Error",
text = "Reference layers are not supported."
}
return
end
local oldMode <const> = activeSprite.colorMode
if oldMode ~= ColorMode.RGB then
app.alert {
title = "Error",
text = "Only RGB color mode is supported."
}
return
end
local docPrefs <const> = app.preferences.document(activeSprite)
local tlPrefs <const> = docPrefs.timeline
local frameUiOffset <const> = tlPrefs.first_frame - 1 --[[@as integer]]
-- Check for tile maps.
local isTilemap <const> = srcLayer.isTilemap
local tileSet = nil
if isTilemap then
tileSet = srcLayer.tileset
end
-- Cache global methods.
local fromHex <const> = Clr.fromHex
local v3Hash <const> = Vec3.hashCode
local octInsert <const> = Octree.insert
local search <const> = Octree.queryInternal
local tilesToImage <const> = AseUtilities.tileMapToImage
local strfmt <const> = string.format
local transact <const> = app.transaction
-- Convert source palette colors to points
-- inserted into octree.
local palType <const> = args.palType
or defaults.palType --[[@as string]]
local palFile <const> = args.palFile --[[@as string]]
local hexesProfile <const>, hexesSrgb <const> = AseUtilities.asePaletteLoad(
palType, palFile, 0, 512, true)
-- Select which conversion functions to use.
local clrSpacePreset <const> = args.clrSpacePreset
or defaults.clrSpacePreset --[[@as string]]
local octBounds <const> = boundsFromPreset(clrSpacePreset)
local clrV3Func <const> = clrToV3FuncFromPreset(clrSpacePreset)
-- Select query radius according to color space.
local cvgRad = 0.0
local distFunc = Vec3.distEuclidean
if clrSpacePreset == "CIE_LAB"
or clrSpacePreset == "SR_LAB_2" then
cvgRad = args.cvgLabRad
or defaults.cvgLabRad --[[@as number]]
-- See https://www.wikiwand.com/en/
-- Color_difference#/Other_geometric_constructions
distFunc = function(a, b)
local da <const> = b.x - a.x
local db <const> = b.y - a.y
return math.sqrt(da * da + db * db)
+ math.abs(b.z - a.z)
end
else
cvgRad = args.cvgNormRad
or defaults.cvgNormRad --[[@as number]]
cvgRad = cvgRad * 0.01
end
-- Create octree.
-- local exactMatches = {}
---@type table<integer, integer>
local ptToHexDict <const> = {}
local hexesSrgbLen <const> = #hexesSrgb
local octExpBits <const> = args.octCapacity
or defaults.octCapacityBits --[[@as integer]]
local octCapacity = 1 << octExpBits
local octree <const> = Octree.new(octBounds, octCapacity, 1)
local hexIdx = 0
while hexIdx < hexesSrgbLen do
hexIdx = hexIdx + 1
local hexSrgb <const> = hexesSrgb[hexIdx]
if (hexSrgb & 0xff000000) ~= 0 then
local clr <const> = fromHex(hexSrgb)
local pt <const> = clrV3Func(clr)
local hexProfile <const> = hexesProfile[hexIdx]
-- exactMatches[hexProfile] = true
ptToHexDict[v3Hash(pt)] = hexProfile
octInsert(octree, pt)
end
end
Octree.cull(octree)
-- Get frames.
local target <const> = args.target
or defaults.target --[[@as string]]
local frames <const> = Utilities.flatArr2(
AseUtilities.getFrames(activeSprite, target))
-- Create a new layer, srcLayer should not be a group,
-- and thus have an opacity and blend mode.
local trgLayer <const> = activeSprite:newLayer()
app.transaction("Set Layer Props", function()
local srcLayerName = "Layer"
if #srcLayer.name > 0 then
srcLayerName = srcLayer.name
end
trgLayer.name = string.format("%s %s %03d",
srcLayerName, clrSpacePreset, hexesSrgbLen)
trgLayer.parent = AseUtilities.getTopVisibleParent(srcLayer)
trgLayer.opacity = srcLayer.opacity or 255
trgLayer.blendMode = srcLayer.blendMode
or BlendMode.NORMAL
end)
local rgbColorMode <const> = ColorMode.RGB
local lenFrames <const> = #frames
local i = 0
while i < lenFrames do
i = i + 1
local srcFrame <const> = frames[i]
local srcCel <const> = srcLayer:cel(srcFrame)
if srcCel then
local srcImg = srcCel.image
if isTilemap then
srcImg = tilesToImage(srcImg, tileSet, rgbColorMode)
end
-- Get unique hexadecimal values from image.
-- There's no need to preserve order.
---@type table<integer, boolean>
local hexesUnique <const> = {}
local srcPxItr <const> = srcImg:pixels()
for pixel in srcPxItr do
hexesUnique[pixel()] = true
end
-- Create a table where unique hexes are associated
-- with Vec3 queries to an octree.
---@type {hex: integer, point: Vec3}[]
local queries <const> = {}
local lenQueries = 0
for k, _ in pairs(hexesUnique) do
local clr <const> = fromHex(k)
local pt <const> = clrV3Func(clr)
lenQueries = lenQueries + 1
queries[lenQueries] = { hex = k, point = pt }
end
-- Find nearest color in palette.
---@type table<integer, integer>
local correspDict <const> = {}
local j = 0
while j < lenQueries do
j = j + 1
local query <const> = queries[j]
local queryHex <const> = query.hex
local resultHex = 0x0
-- if exactMatches[queryHex] then
-- resultHex = queryHex
-- else
local nearPoint <const>, _ <const> = search(
octree, query.point, cvgRad, distFunc)
if nearPoint then
local hsh <const> = v3Hash(nearPoint)
resultHex = ptToHexDict[hsh]
end
-- end
correspDict[queryHex] = resultHex & 0x00ffffff
end
-- Apply colors to image.
-- Use source color alpha.
local trgImg <const> = srcImg:clone()
local trgPxItr <const> = trgImg:pixels()
for pixel in trgPxItr do
local srcHex <const> = pixel()
pixel(srcHex & 0xff000000 | correspDict[srcHex])
end
transact(
strfmt("PaletteToCel %d", srcFrame + frameUiOffset),
function()
local trgCel <const> = activeSprite:newCel(
trgLayer, srcFrame,
trgImg, srcCel.position)
trgCel.opacity = srcCel.opacity
end)
end
end
app.layer = trgLayer
app.refresh()
if printElapsed then
local endTime <const> = os.clock()
local elapsed <const> = endTime - startTime
app.alert {
title = "Diagnostic",
text = {
string.format("Start: %.2f", startTime),
string.format("End: %.2f", endTime),
string.format("Elapsed: %.6f", elapsed),
string.format("Colors: %d", hexesSrgbLen),
}
}
end
end
}
dlg:button {
id = "cancel",
text = "&CANCEL",
focus = false,
onclick = function()
dlg:close()
end
}
dlg:show {
autoscrollbars = true,
wait = false
}