--[[
| This file was obtained through the combined efforts
| of Madbluntz & Plymouth Antiquarian Society.
|
| Credits: lifestorm, Gregory Wayne Rossel JR.,
| 	Maloy, DrPepper10 @ RIP, Atle!
|
| Visit for more: https://plymouth.thetwilightzone.ru/
--]]


local mat_ColorMod = Material( "pp/colour" )
mat_ColorMod:SetTexture( "$fbtexture", render.GetScreenEffectTexture() )

--[[---------------------------------------------------------
	Register the convars that will control this effect
-----------------------------------------------------------]]
local pp_colormod = CreateClientConVar( "pp_colormod", "0", false, false )
local pp_colormod_addr = CreateClientConVar( "pp_colormod_addr", "0", true, false )
local pp_colormod_addg = CreateClientConVar( "pp_colormod_addg", "0", true, false )
local pp_colormod_addb = CreateClientConVar( "pp_colormod_addb", "0", true, false )
local pp_colormod_brightness = CreateClientConVar( "pp_colormod_brightness", "0", true, false )
local pp_colormod_contrast = CreateClientConVar( "pp_colormod_contrast", "1", true, false )
local pp_colormod_color = CreateClientConVar( "pp_colormod_color", "1", true, false )
local pp_colormod_mulr = CreateClientConVar( "pp_colormod_mulr", "0", true, false )
local pp_colormod_mulg = CreateClientConVar( "pp_colormod_mulg", "0", true, false )
local pp_colormod_mulb = CreateClientConVar( "pp_colormod_mulb", "0", true, false )
local pp_colormod_inv = CreateClientConVar( "pp_colormod_inv", "0", true, false )

function DrawColorModify( tab )

	render.CopyRenderTargetToTexture( render.GetScreenEffectTexture() )

	for k, v in pairs( tab ) do

		mat_ColorMod:SetFloat( k, v )

	end

	render.SetMaterial( mat_ColorMod )
	render.DrawScreenQuad()

end

hook.Add( "RenderScreenspaceEffects", "RenderColorModify", function()

	if ( !pp_colormod:GetBool() ) then return end
	if ( !GAMEMODE:PostProcessPermitted( "color mod" ) ) then return end

	local tab = {}

	tab[ "$pp_colour_addr" ] = pp_colormod_addr:GetFloat() * 0.02
	tab[ "$pp_colour_addg" ] = pp_colormod_addg:GetFloat() * 0.02
	tab[ "$pp_colour_addb" ] = pp_colormod_addb:GetFloat() * 0.02
	tab[ "$pp_colour_brightness" ] = pp_colormod_brightness:GetFloat()
	tab[ "$pp_colour_contrast" ] = pp_colormod_contrast:GetFloat()
	tab[ "$pp_colour_colour" ] = pp_colormod_color:GetFloat()
	tab[ "$pp_colour_mulr" ] = pp_colormod_mulr:GetFloat() * 0.1
	tab[ "$pp_colour_mulg" ] = pp_colormod_mulg:GetFloat() * 0.1
	tab[ "$pp_colour_mulb" ] = pp_colormod_mulb:GetFloat() * 0.1
	tab[ "$pp_colour_inv" ] = pp_colormod_inv:GetFloat()

	DrawColorModify( tab )

end )

list.Set( "PostProcess", "#colormod_pp", {

	icon = "gui/postprocess/colourmod.png",
	convar = "pp_colormod",
	category = "#shaders_pp",

	cpanel = function( CPanel )

		CPanel:AddControl( "Header", { Description = "#colormod_pp.desc" } )
		CPanel:AddControl( "CheckBox", { Label = "#colormod_pp.enable", Command = "pp_colormod" } )

		local params = { Options = {}, CVars = {}, MenuButton = "1", Folder = "colormod" }
		params.Options[ "#preset.default" ] = { pp_colormod_addr = "0", pp_colormod_addg = "0", pp_colormod_addb = "0", pp_colormod_brightness = "0", pp_colormod_contrast = "1", pp_colormod_color = "1", pp_colormod_mulr = "0", pp_colormod_mulg = "0", pp_colormod_mulb = "0", pp_colormod_inv = "0" }
		params.CVars = table.GetKeys( params.Options[ "#preset.default" ] )
		CPanel:AddControl( "ComboBox", params )

		CPanel:AddControl( "Slider", { Label = "#colormod_pp.brightness", Command = "pp_colormod_brightness", Type = "Float", Min = "-2", Max = "2" } )
		CPanel:AddControl( "Slider", { Label = "#colormod_pp.contrast", Command = "pp_colormod_contrast", Type = "Float", Min = "0", Max = "10" } )
		CPanel:AddControl( "Slider", { Label = "#colormod_pp.color", Command = "pp_colormod_color", Type = "Float", Min = "0", Max = "5" } )
		CPanel:AddControl( "Slider", { Label = "#colormod_pp.invert", Command = "pp_colormod_inv", Type = "Float", Min = "0", Max = "1" } )

		CPanel:AddControl( "Color", { Label = "#colormod_pp.color_add", Red = "pp_colormod_addr", Green = "pp_colormod_addg", Blue = "pp_colormod_addb", ShowAlpha = "0", ShowHSV = "1", ShowRGB = "1" } )
		CPanel:AddControl( "Color", { Label = "#colormod_pp.color_multiply", Red = "pp_colormod_mulr", Green = "pp_colormod_mulg", Blue = "pp_colormod_mulb", ShowAlpha = "0", ShowHSV = "1", ShowRGB = "1" } )

	end

} )