WoWInterface/Interface/AddOns/ElvUI_SLE/libs/LibCustomGlow-1.0/LibCustomGlow-1.0.lua

local MAJOR_VERSION = 'LibCustomGlow-1.0'
local MINOR_VERSION = 8
if not LibStub then error(MAJOR_VERSION .. ' requires LibStub.') end
local lib, oldversion = LibStub:NewLibrary(MAJOR_VERSION, MINOR_VERSION)
if not lib then return end

local Masque = LibStub('Masque', true)
local textureList = {
 ['empty'] = [[Interface\AdventureMap\BrokenIsles\AM_29]],
 ['white'] = [[Interface\BUTTONS\WHITE8X8]],
 ['shine'] = [[Interface\Artifacts\Artifacts]]

 }

function lib.RegisterTextures(texture,id)
	textureList[id] = texture
end

lib.glowList = {}
lib.startList = {}
lib.stopList = {}

local GlowParent = UIParent
local GlowMaskPool = CreateFromMixins(ObjectPoolMixin)
lib.GlowMaskPool = GlowMaskPool

local function MaskPoolFactory(maskPool)
	return maskPool.parent:CreateMaskTexture()
end

local MaskPoolResetter = function(maskPool, mask)
	mask:Hide()
	mask:ClearAllPoints()
end

ObjectPoolMixin.OnLoad(GlowMaskPool,MaskPoolFactory,MaskPoolResetter)
GlowMaskPool.parent =  GlowParent

local TexPoolResetter = function(pool, tex)
	local maskNum = tex:GetNumMaskTextures()

	for i = maskNum, 1 do
		tex:RemoveMaskTexture(tex:GetMaskTexture(i))
	end

	tex:Hide()
	tex:ClearAllPoints()
end

local GlowTexPool = CreateTexturePool(GlowParent, 'ARTWORK', 7, nil, TexPoolResetter)
lib.GlowTexPool = GlowTexPool

local FramePoolResetter = function(framePool, frame)
	frame:SetScript('OnUpdate', nil)
	local parent = frame:GetParent()

	if parent[frame.name] then
		parent[frame.name] = nil
	end

	if frame.textures then
		for _, texture in pairs(frame.textures) do
			GlowTexPool:Release(texture)
		end
	end

	if frame.bg then
		GlowTexPool:Release(frame.bg)
		frame.bg = nil
	end

	if frame.masks then
		for _,mask in pairs(frame.masks) do
			GlowMaskPool:Release(mask)
		end
		frame.masks = nil
	end

	frame.textures = {}
	frame.info = {}
	frame.name = nil
	frame.timer = nil
	frame:Hide()
	frame:ClearAllPoints()
end

local GlowFramePool = CreateFramePool('Frame', GlowParent, nil, FramePoolResetter)
lib.GlowFramePool = GlowFramePool

local function addFrameAndTex(r, color, name, key, N, xOffset, yOffset, texture, texCoord, desaturated)
	key = key or ''

	if not r[name..key] then
		r[name..key] = GlowFramePool:Acquire()
		r[name..key]:SetParent(r)
		r[name..key]:SetFrameLevel(r:GetFrameLevel()+8)
		r[name..key].name = name..key
	end

	local f = r[name..key]
	f:SetPoint('TOPLEFT', r, 'TOPLEFT', -xOffset, yOffset)
	f:SetPoint('BOTTOMRIGHT', r, 'BOTTOMRIGHT', xOffset, -yOffset)
	f:Show()

	if not f.textures then
		f.textures = {}
	end

	for i=1, N do
		if not f.textures[i] then
			f.textures[i] = GlowTexPool:Acquire()
			f.textures[i]: SetTexture(texture)
			f.textures[i]: SetTexCoord(texCoord[1],texCoord[2],texCoord[3],texCoord[4])
			f.textures[i]: SetDesaturated(desaturated)
			f.textures[i]: SetParent(f)
			f.textures[i]: SetDrawLayer('ARTWORK',7)
		end

		f.textures[i]:SetVertexColor(color[1], color[2], color[3], color[4])
		f.textures[i]:Show()
	end

	while #f.textures>N do
		GlowTexPool:Release(f.textures[#f.textures])
		table.remove(f.textures)
	end
end

--Pixel Glow Functions--
local pCalc1 = function(progress,s,th,p)
	local c
	if progress>p[3] or progress<p[0] then
		c = 0
	elseif progress>p[2] then
		c =s-th-(progress-p[2])/(p[3]-p[2])*(s-th)
	elseif progress>p[1] then
		c =s-th
	else
		c = (progress-p[0])/(p[1]-p[0])*(s-th)
	end
	return math.floor(c+0.5)
end

local pCalc2 = function(progress, s, th, p)
	local c
	if progress>p[3] then
		c = s-th-(progress-p[3])/(p[0]+1-p[3])*(s-th)
	elseif progress>p[2] then
		c = s-th
	elseif progress>p[1] then
		c = (progress-p[1])/(p[2]-p[1])*(s-th)
	elseif progress>p[0] then
		c = 0
	else
		c = s-th-(progress+1-p[3])/(p[0]+1-p[3])*(s-th)
	end
	return math.floor(c+0.5)
end

local pUpdate = function(self, elapsed)
	self.timer = self.timer+elapsed/self.info.period
	if self.timer>1 or self.timer <-1 then
		self.timer = self.timer%1
	end

	local progress = self.timer
	local width,height = self:GetSize()
	if width ~= self.info.width or height ~= self.info.height then
		self.info.width = width
		self.info.height = height
		local perimeter = 2*(width+height)
		self.info.pTLx = {
			[0] = (height+self.info.length/2)/perimeter,
			[1] = (height+width+self.info.length/2)/perimeter,
			[2] = (2*height+width-self.info.length/2)/perimeter,
			[3] = 1-self.info.length/2/perimeter
		}
		self.info.pTLy ={
			[0] = (height-self.info.length/2)/perimeter,
			[1] = (height+width+self.info.length/2)/perimeter,
			[2] = (height*2+width+self.info.length/2)/perimeter,
			[3] = 1-self.info.length/2/perimeter
		}
		self.info.pBRx ={
			[0] = self.info.length/2/perimeter,
			[1] = (height-self.info.length/2)/perimeter,
			[2] = (height+width-self.info.length/2)/perimeter,
			[3] = (height*2+width+self.info.length/2)/perimeter
		}
		self.info.pBRy ={
			[0] = self.info.length/2/perimeter,
			[1] = (height+self.info.length/2)/perimeter,
			[2] = (height+width-self.info.length/2)/perimeter,
			[3] = (height*2+width-self.info.length/2)/perimeter
		}
	end
	if self:IsShown() then
		if not (self.masks[1]:IsShown()) then
			self.masks[1]:Show()
			self.masks[1]:SetPoint('TOPLEFT', self, 'TOPLEFT', self.info.th, -self.info.th)
			self.masks[1]:SetPoint('BOTTOMRIGHT', self, 'BOTTOMRIGHT', -self.info.th, self.info.th)
		end
		if self.masks[2] and not(self.masks[2]:IsShown()) then
			self.masks[2]:Show()
			self.masks[2]:SetPoint('TOPLEFT', self, 'TOPLEFT', self.info.th + 1, -self.info.th-1)
			self.masks[2]:SetPoint('BOTTOMRIGHT', self, 'BOTTOMRIGHT', -self.info.th-1, self.info.th+1)
		end
		if self.bg and not(self.bg:IsShown()) then
			self.bg:Show()
		end
		for k,line in pairs(self.textures) do
			line:SetPoint('TOPLEFT', self, 'TOPLEFT', pCalc1((progress+self.info.step*(k-1))%1,width,self.info.th,self.info.pTLx),-pCalc2((progress+self.info.step*(k-1))%1,height,self.info.th,self.info.pTLy))
			line:SetPoint('BOTTOMRIGHT', self, 'TOPLEFT', self.info.th+pCalc2((progress+self.info.step*(k-1))%1,width,self.info.th,self.info.pBRx),-height+pCalc1((progress+self.info.step*(k-1))%1,height,self.info.th,self.info.pBRy))
		end
	end
end

function lib.PixelGlow_Start(r, color, N, frequency, length, th, xOffset, yOffset, border, key)
	if not r then
		return
	end
	if not color then
		color = {0.95, 0.95, 0.32, 1}
	end
	N = N or 8
	local period
	if frequency then
		if not(frequency>0 or frequency<0) then
			period = 4
		else
			period = 1/frequency
		end
	else
		period = 4
	end
	local width,height = r:GetSize()
	length = length or math.floor((width+height)*(2/N-0.1))
	length = min(length,min(width,height))
	th = th or 1
	xOffset = xOffset or 0
	yOffset = yOffset or 0
	key = key or ""

	addFrameAndTex(r, color, '_PixelGlow', key, N, xOffset, yOffset, textureList.white, {0, 1, 0, 1}, nil)
	local f = r['_PixelGlow'..key]
	if not f.masks then
		f.masks = {}
	end
	if not f.masks[1] then
		f.masks[1] = GlowMaskPool:Acquire()
		f.masks[1]:SetTexture(textureList.empty, 'CLAMPTOWHITE', 'CLAMPTOWHITE')
		f.masks[1]:Show()
	end
	f.masks[1]:SetPoint('TOPLEFT', f, 'TOPLEFT', th, -th)
	f.masks[1]:SetPoint('BOTTOMRIGHT', f, 'BOTTOMRIGHT', -th, th)

	if not(border==false) then
		if not f.masks[2] then
			f.masks[2] = GlowMaskPool:Acquire()
			f.masks[2]:SetTexture(textureList.empty, 'CLAMPTOWHITE', 'CLAMPTOWHITE')
		end
		f.masks[2]:SetPoint('TOPLEFT', f, 'TOPLEFT', th+1, -th-1)
		f.masks[2]:SetPoint('BOTTOMRIGHT', f, 'BOTTOMRIGHT', -th-1, th+1)

		if not f.bg then
			f.bg = GlowTexPool:Acquire()
			f.bg:SetColorTexture(0.1, 0.1, 0.1, 0.8)
			f.bg:SetParent(f)
			f.bg:SetAllPoints(f)
			f.bg:SetDrawLayer('ARTWORK', 6)
			f.bg:AddMaskTexture(f.masks[2])
		end
	else
		if f.bg then
			GlowTexPool:Release(f.bg)
			f.bg = nil
		end
		if f.masks[2] then
			GlowMaskPool:Release(f.masks[2])
			f.masks[2] = nil
		end
	end
	for _,tex in pairs(f.textures) do
		if tex:GetNumMaskTextures() < 1 then
			tex:AddMaskTexture(f.masks[1])
		end
	end
	f.timer = f.timer or 0
	f.info = f.info or {}
	f.info.step = 1/N
	f.info.period = period
	f.info.th = th
	if f.info.length ~= length then
		f.info.width = nil
		f.info.length = length
	end
	f:SetScript('OnUpdate', pUpdate)
end

function lib.PixelGlow_Stop(r,key)
	if not r then
		return
	end
	key = key or ''
	if not r['_PixelGlow'..key] then
		return false
	else
		GlowFramePool:Release(r['_PixelGlow'..key])
	end
end

table.insert(lib.glowList, 'Pixel Glow')
lib.startList['Pixel Glow'] = lib.PixelGlow_Start
lib.stopList['Pixel Glow'] = lib.PixelGlow_Stop


--Autocast Glow Funcitons--
local function acUpdate(self,elapsed)
	local width, height = self:GetSize()
	if width ~= self.info.width or height ~= self.info.height then
		self.info.width = width
		self.info.height = height
		self.info.perimeter = 2*(width+height)
		self.info.bottomlim = height*2+width
		self.info.rightlim = height+width
		self.info.space = self.info.perimeter/self.info.N
	end

	local texIndex = 0
	for k=1, 4 do
		self.timer[k] = self.timer[k]+elapsed/(self.info.period*k)
		if self.timer[k] > 1 or self.timer[k] <-1 then
			self.timer[k] = self.timer[k]%1
		end
		for i = 1, self.info.N do
			texIndex = texIndex+1
			local position = (self.info.space*i+self.info.perimeter*self.timer[k])%self.info.perimeter
			if position>self.info.bottomlim then
				self.textures[texIndex]:SetPoint('CENTER', self, 'BOTTOMRIGHT', -position+self.info.bottomlim, 0)
			elseif position>self.info.rightlim then
				self.textures[texIndex]:SetPoint('CENTER', self, 'TOPRIGHT', 0, -position+self.info.rightlim)
			elseif position>self.info.height then
				self.textures[texIndex]:SetPoint('CENTER', self, 'TOPLEFT', position-self.info.height, 0)
			else
				self.textures[texIndex]:SetPoint('CENTER', self, 'BOTTOMLEFT', 0, position)
			end
		end
	end
end

function lib.AutoCastGlow_Start(r, color, N, frequency, scale, xOffset, yOffset, key)
	if not r then
		return
	end

	if not color then
		color = {0.95, 0.95, 0.32, 1}
	end
	N = N or 4
	local period
	if frequency then
		if not(frequency>0 or frequency<0) then
			period = 8
		else
			period = 1/frequency
		end
	else
		period = 8
	end
	scale = scale or 1
	xOffset = xOffset or 0
	yOffset = yOffset or 0
	key = key or ''

	addFrameAndTex(r, color, '_AutoCastGlow', key, N*4, xOffset, yOffset, textureList.shine, {0.8115234375, 0.9169921875, 0.8798828125, 0.9853515625}, true)
	local f = r['_AutoCastGlow'..key]
	local sizes = {7, 6, 5, 4}
	for k, size in pairs(sizes) do
		for i = 1, N do
			f.textures[i+N*(k-1)]:SetSize(size*scale, size*scale)
		end
	end
	f.timer = f.timer or {0, 0, 0, 0}
	f.info = f.info or {}
	f.info.N = N
	f.info.period = period
	f:SetScript('OnUpdate', acUpdate)
end

function lib.AutoCastGlow_Stop(r, key)
	if not r then
		return
	end

	key = key or ''
	if not r['_AutoCastGlow'..key] then
		return false
	else
		GlowFramePool:Release(r['_AutoCastGlow'..key])
	end
end

table.insert(lib.glowList, 'Autocast Shine')
lib.startList['Autocast Shine'] = lib.AutoCastGlow_Start
lib.stopList['Autocast Shine'] = lib.AutoCastGlow_Stop

--Action Button Glow--
local function ButtonGlowResetter(framePool, frame)
	frame:SetScript('OnUpdate', nil)
	local parent = frame:GetParent()
	if parent._ButtonGlow then
		parent._ButtonGlow = nil
	end
	frame:Hide()
	frame:ClearAllPoints()
end
local ButtonGlowPool = CreateFramePool('Frame', GlowParent, nil, ButtonGlowResetter)
lib.ButtonGlowPool = ButtonGlowPool

local function CreateScaleAnim(group, target, order, duration, x, y, delay)
	local scale = group:CreateAnimation('Scale')
	scale:SetChildKey(target)
	scale:SetOrder(order)
	scale:SetDuration(duration)
	scale:SetScale(x, y)

	if delay then
		scale:SetStartDelay(delay)
	end
end

local function CreateAlphaAnim(group, target, order, duration, fromAlpha, toAlpha, delay, appear)
	local alpha = group:CreateAnimation('Alpha')
	alpha:SetChildKey(target)
	alpha:SetOrder(order)
	alpha:SetDuration(duration)
	alpha:SetFromAlpha(fromAlpha)
	alpha:SetToAlpha(toAlpha)
	if delay then
		alpha:SetStartDelay(delay)
	end
	if appear then
		table.insert(group.appear, alpha)
	else
		table.insert(group.fade, alpha)
	end
end

local function AnimIn_OnPlay(group)
	local frame = group:GetParent()
	local frameWidth, frameHeight = frame:GetSize()
	frame.spark:SetSize(frameWidth, frameHeight)
	frame.spark:SetAlpha(not(frame.color) and 1.0 or 0.3*frame.color[4])
	frame.innerGlow:SetSize(frameWidth / 2, frameHeight / 2)
	frame.innerGlow:SetAlpha(not(frame.color) and 1.0 or frame.color[4])
	frame.innerGlowOver:SetAlpha(not(frame.color) and 1.0 or frame.color[4])
	frame.outerGlow:SetSize(frameWidth * 2, frameHeight * 2)
	frame.outerGlow:SetAlpha(not(frame.color) and 1.0 or frame.color[4])
	frame.outerGlowOver:SetAlpha(not(frame.color) and 1.0 or frame.color[4])
	frame.ants:SetSize(frameWidth * 0.85, frameHeight * 0.85)
	frame.ants:SetAlpha(0)
	frame:Show()
end

local function AnimIn_OnFinished(group)
	local frame = group:GetParent()
	local frameWidth, frameHeight = frame:GetSize()
	frame.spark:SetAlpha(0)
	frame.innerGlow:SetAlpha(0)
	frame.innerGlow:SetSize(frameWidth, frameHeight)
	frame.innerGlowOver:SetAlpha(0.0)
	frame.outerGlow:SetSize(frameWidth, frameHeight)
	frame.outerGlowOver:SetAlpha(0.0)
	frame.outerGlowOver:SetSize(frameWidth, frameHeight)
	frame.ants:SetAlpha(not(frame.color) and 1.0 or frame.color[4])
end

local function AnimIn_OnStop(group)
	local frame = group:GetParent()
	local frameWidth, frameHeight = frame:GetSize()
	frame.spark:SetAlpha(0)
	frame.innerGlow:SetAlpha(0)
	frame.innerGlowOver:SetAlpha(0.0)
	frame.outerGlowOver:SetAlpha(0.0)
end

local function bgHide(self)
	if self.animOut:IsPlaying() then
		self.animOut:Stop()
		ButtonGlowPool:Release(self)
	end
end

local function bgUpdate(self, elapsed)
	AnimateTexCoords(self.ants, 256, 256, 48, 48, 22, elapsed, self.throttle)
	local cooldown = self:GetParent().cooldown
	if (cooldown and cooldown:IsShown() and cooldown:GetCooldownDuration() > 3000) then
		self:SetAlpha(0.5)
	else
		self:SetAlpha(1.0)
	end
end

local function configureButtonGlow(f,alpha)
	f.spark = f:CreateTexture(nil, 'BACKGROUND')
	f.spark:SetPoint('CENTER')
	f.spark:SetAlpha(0)
	f.spark:SetTexture([[Interface\SpellActivationOverlay\IconAlert]])
	f.spark:SetTexCoord(0.00781250, 0.61718750, 0.00390625, 0.26953125)

	-- inner glow
	f.innerGlow = f:CreateTexture(nil, 'ARTWORK')
	f.innerGlow:SetPoint('CENTER')
	f.innerGlow:SetAlpha(0)
	f.innerGlow:SetTexture([[Interface\SpellActivationOverlay\IconAlert]])
	f.innerGlow:SetTexCoord(0.00781250, 0.50781250, 0.27734375, 0.52734375)

	-- inner glow over
	f.innerGlowOver = f:CreateTexture(nil, 'ARTWORK')
	f.innerGlowOver:SetPoint('TOPLEFT', f.innerGlow, 'TOPLEFT')
	f.innerGlowOver:SetPoint('BOTTOMRIGHT', f.innerGlow, 'BOTTOMRIGHT')
	f.innerGlowOver:SetAlpha(0)
	f.innerGlowOver:SetTexture([[Interface\SpellActivationOverlay\IconAlert]])
	f.innerGlowOver:SetTexCoord(0.00781250, 0.50781250, 0.53515625, 0.78515625)

	-- outer glow
	f.outerGlow = f:CreateTexture(nil, 'ARTWORK')
	f.outerGlow:SetPoint('CENTER')
	f.outerGlow:SetAlpha(0)
	f.outerGlow:SetTexture([[Interface\SpellActivationOverlay\IconAlert]])
	f.outerGlow:SetTexCoord(0.00781250, 0.50781250, 0.27734375, 0.52734375)

	-- outer glow over
	f.outerGlowOver = f:CreateTexture(nil, 'ARTWORK')
	f.outerGlowOver:SetPoint('TOPLEFT', f.outerGlow, 'TOPLEFT')
	f.outerGlowOver:SetPoint('BOTTOMRIGHT', f.outerGlow, 'BOTTOMRIGHT')
	f.outerGlowOver:SetAlpha(0)
	f.outerGlowOver:SetTexture([[Interface\SpellActivationOverlay\IconAlert]])
	f.outerGlowOver:SetTexCoord(0.00781250, 0.50781250, 0.53515625, 0.78515625)

	-- ants
	f.ants = f:CreateTexture(nil, 'OVERLAY')
	f.ants:SetPoint('CENTER')
	f.ants:SetAlpha(0)
	f.ants:SetTexture([[Interface\SpellActivationOverlay\IconAlertAnts]])

	f.animIn = f:CreateAnimationGroup()
	f.animIn.appear = {}
	f.animIn.fade = {}
	CreateScaleAnim(f.animIn, 'spark',          1, 0.2, 1.5, 1.5)
	CreateAlphaAnim(f.animIn, 'spark',          1, 0.2, 0, alpha, nil, true)
	CreateScaleAnim(f.animIn, 'innerGlow',      1, 0.3, 2, 2)
	CreateScaleAnim(f.animIn, 'innerGlowOver',  1, 0.3, 2, 2)
	CreateAlphaAnim(f.animIn, 'innerGlowOver',  1, 0.3, alpha, 0, nil, false)
	CreateScaleAnim(f.animIn, 'outerGlow',      1, 0.3, 0.5, 0.5)
	CreateScaleAnim(f.animIn, 'outerGlowOver',  1, 0.3, 0.5, 0.5)
	CreateAlphaAnim(f.animIn, 'outerGlowOver',  1, 0.3, alpha, 0, nil, false)
	CreateScaleAnim(f.animIn, 'spark',          1, 0.2, 2/3, 2/3, 0.2)
	CreateAlphaAnim(f.animIn, 'spark',          1, 0.2, alpha, 0, 0.2, false)
	CreateAlphaAnim(f.animIn, 'innerGlow',      1, 0.2, alpha, 0, 0.3, false)
	CreateAlphaAnim(f.animIn, 'ants',           1, 0.2, 0, alpha, 0.3, true)
	f.animIn:SetScript('OnPlay', AnimIn_OnPlay)
	f.animIn:SetScript('OnStop', AnimIn_OnStop)
	f.animIn:SetScript('OnFinished', AnimIn_OnFinished)

	f.animOut = f:CreateAnimationGroup()
	f.animOut.appear = {}
	f.animOut.fade = {}
	CreateAlphaAnim(f.animOut, 'outerGlowOver', 1, 0.2, 0, alpha, nil, true)
	CreateAlphaAnim(f.animOut, 'ants',          1, 0.2, alpha, 0, nil, false)
	CreateAlphaAnim(f.animOut, 'outerGlowOver', 2, 0.2, alpha, 0, nil, false)
	CreateAlphaAnim(f.animOut, 'outerGlow',     2, 0.2, alpha, 0, nil, false)
	f.animOut:SetScript('OnFinished', function(self) ButtonGlowPool:Release(self:GetParent()) end)

	f:SetScript('OnHide', bgHide)
end

local function updateAlphaAnim(f, alpha)
	for _, anim in pairs(f.animIn.appear) do
		anim:SetToAlpha(alpha)
	end
	for _, anim in pairs(f.animIn.fade) do
		anim:SetFromAlpha(alpha)
	end
	for _, anim in pairs(f.animOut.appear) do
		anim:SetToAlpha(alpha)
	end
	for _, anim in pairs(f.animOut.fade) do
		anim:SetFromAlpha(alpha)
	end
end

local ButtonGlowTextures = {['spark'] = true,['innerGlow'] = true,['innerGlowOver'] = true,['outerGlow'] = true,['outerGlowOver'] = true,['ants'] = true}

function lib.ButtonGlow_Start(r, color, frequency)
	if not r then
		return
	end

	local throttle
	if frequency and frequency > 0 then
		throttle = 0.25/frequency*0.01
	else
		throttle = 0.01
	end
	if r._ButtonGlow then
		local f = r._ButtonGlow
		if f.animOut:IsPlaying() then
			f.animOut:Stop()
			f.animIn:Play()
		end
		if not(color) then
			for texture in pairs(ButtonGlowTextures) do
				f[texture]:SetDesaturated(nil)
				f[texture]:SetVertexColor(1, 1, 1)
				f[texture]:SetAlpha(f[texture]:GetAlpha()/(f.color and f.color[4] or 1))
				updateAlphaAnim(f, 1)
			end
			f.color = false
		else
			for texture in pairs(ButtonGlowTextures) do
				f[texture]:SetDesaturated(1)
				f[texture]:SetVertexColor(color[1],color[2],color[3])
				f[texture]:SetAlpha(f[texture]:GetAlpha()/(f.color and f.color[4] or 1)*color[4])
				updateAlphaAnim(f, color and color[4] or 1)
			end
			f.color = color
		end
		f.throttle = throttle
	else
		local f, new = ButtonGlowPool:Acquire()
		if new then
			configureButtonGlow(f,color and color[4] or 1)
		else
			updateAlphaAnim(f,color and color[4] or 1)
		end
		r._ButtonGlow = f
		local width, height = r:GetSize()
		f:SetParent(r)
		f:SetFrameLevel(r:GetFrameLevel()+8)
		f:SetSize(width * 1.4, height * 1.4)
		f:SetPoint('TOPLEFT', r, 'TOPLEFT', -width * 0.2, height * 0.2)
		f:SetPoint('BOTTOMRIGHT', r, 'BOTTOMRIGHT', width * 0.2, -height * 0.2)
		if not(color) then
			f.color = false
			for texture in pairs(ButtonGlowTextures) do
				f[texture]:SetDesaturated(nil)
				f[texture]:SetVertexColor(1, 1, 1)
			end
		else
			f.color = color
			for texture in pairs(ButtonGlowTextures) do
				f[texture]:SetDesaturated(1)
				f[texture]:SetVertexColor(color[1], color[2], color[3])
			end
		end
		f.throttle = throttle
		f:SetScript('OnUpdate', bgUpdate)

		f.animIn:Play()

		if Masque and Masque.UpdateSpellAlert and (not r.overlay or not issecurevariable(r, 'overlay')) then
			local old_overlay = r.overlay
			r.overlay = f
			Masque:UpdateSpellAlert(r)
			r.overlay = old_overlay
		end
	end
end

function lib.ButtonGlow_Stop(r)
	if r._ButtonGlow then
		if r._ButtonGlow.animIn:IsPlaying() then
			r._ButtonGlow.animIn:Stop()
			ButtonGlowPool:Release(r._ButtonGlow)
		elseif r:IsVisible() then
			r._ButtonGlow.animOut:Play()
		else
			ButtonGlowPool:Release(r._ButtonGlow)
		end
	end
end

table.insert(lib.glowList, 'Action Button Glow')
lib.startList['Action Button Glow'] = lib.ButtonGlow_Start
lib.stopList['Action Button Glow'] = lib.ButtonGlow_Stop