shaders.lua2p

local Log = require("modules.log.log")

local Shaders = {}

Shaders.paths = {
	blur = "shaders/blur.glsl",
	dissolve = "shaders/dissolve.glsl",
	dither_gradient = "shaders/dither_gradient.glsl",
	motion_blur = "shaders/motion_blur.glsl",
	film_grain = "shaders/film_grain.glsl",
	fog = "shaders/fog.glsl",
	glitch = "shaders/glitch.glsl",

	ngrading = true,
	ngrading_old = "shaders/ngrading_old.glsl",
	ngrading_volume = "shaders/ngrading_volume.glsl",
	ngrading_volume_multi = "shaders/ngrading_volume_multi.glsl",
	ngrading_effect = [[
	vec4 effect(vec4 color, Image tex, vec2 tc, vec2 sc)
	{
		return ngrading(tex, tc) * color;
	}
	]],

	!if _GLSL_NORMALS then
	df_geometry = "shaders/geometry_pass.glsl",
	df_lighting = "shaders/lighting_pass.glsl",
	!else
	df_lighting = "shaders/lighting_pass_basic.glsl",
	!end
}

function Shaders.init()
	local is_mobile = !(_PLATFORM ~= "desktop")
	Log.debug("Validating shaders... GL ES:", is_mobile)
	for k, path in pairs(Shaders.paths) do
		if type(path) == "string" and not stringx.starts_with(k, "ngrading_") then
			Log.debug("checking:", path)
			local status, message = love.graphics.validateShader(is_mobile, path)
			if not status then
				error(path .. "- error with validateShader: " .. message)
			end
			local shader = love.graphics.newShader(path)
			if not shader then
				error(path .. "- error with newShader: " .. message)
			end
		end
	end
end

function Shaders.load_shaders()
	local base = "shaders."
	for k in pairs(Shaders.paths) do
		local path = base .. k
		local exists = love.filesystem.getInfo("shaders/" .. k .. ".lua")
		if exists then
			local shader = require(path)
			Shaders[shader.__type] = shader
		end
	end
end

return Shaders