local exports = exports or {}
local BlurControl = BlurControl or {}
BlurControl.__index = BlurControl

function BlurControl.new(construct, ...)
    local self = setmetatable({}, BlurControl)
    self.comps = {}
    self.compsdirty = true
    return self
end

function BlurControl:constructor()
    
end

function BlurControl:onComponentAdded(sys, comp)
    
end

function BlurControl:onComponentRemoved(sys, comp)
    
end

function BlurControl:onStart(sys)
    self.width = 0
    self.height = 0
end

function BlurControl:onUpdate(sys,deltaTime)
    local height = Amaz.BuiltinObject:getOutputTextureHeight()
    local width = Amaz.BuiltinObject:getOutputTextureWidth()

    -- local _width = Amaz.BuiltinObject:getInputTextureWidth()
    -- local _height = Amaz.BuiltinObject:getInputTextureHeight()
    -- print(string.format("GPU scale width:%d  height: %d\n", _width, self.height) )

    if self.width ~= width or self.height ~= height then
        self.width = width
        self.height = height

        local scale = 0.2
        local blurEnt = sys.scene:findEntityBy("BloomBlur")
        if blurEnt then
            local mat = blurEnt:getComponent("MeshRenderer").material
            if mat then
                mat:setFloat("texelHeightOffset", 1.0 / self.height / scale)
                mat:setFloat("texelWidthOffset", 1.0 / self.width / scale)

                -- print(string.format("GPU scale width:%d  height: %d\n", self.width * scale, self.height * scale) )
            end
        end
    end
end

exports.BlurControl = BlurControl
return exports