-- script.lua
 x = ""
 pos = nil
 pos1 = nil
 defpos = nil
 lastdefpos = nil
 dclpos = nil
 lastdclpos = nil
 c7pos = nil
 lastc7pos = nil
 rpos = nil
 xpos = nil
 SamplerPos = nil
 sr = ""
 sx = ""
 sw = ""
 sm = ""
 SamplerName=""
 CRatio = ""
 CeyePos = ""
 isDone = false
 doSearch = true
 AddNextStr = true
 IsFirst = true

 GBufferDepth = nil
 RenderRatio=nil
 eyePositionWS=nil
 cameraFarMinusNear=nil
 -- search for constants names it helps to determinate shader 
 for i = 1, #SText do
 
 	if GBufferDepth == nil then
		GBufferDepth = string.find(SText[i], "g_GBufferDepth")
	else
		if (GBufferDepth ~= nil) and (string.find(SText[i], "g_GBufferDepth") ~= nil) then
			if SamplerName == "" then
				SamplerPos = string.find(SText[i], "s", GBufferDepth + 12)
				if SamplerPos ~= nil then
					str = SText[i]
					len = 0
					for idx = SamplerPos + 1,  string.len(str) do
						units = string.byte(str, idx) - 48
						if((units < 0) or (units > 9)) then 
							break
						end
						len = len + 1					
					end
					SamplerName = string.sub(SText[i], SamplerPos, SamplerPos + len)
				end
			end
		end
	end

	
	if RenderRatio == nil then
		RenderRatio = string.find(SText[i], "g_RenderRatio")
	else
		if (RenderRatio ~= nil) and (string.find(SText[i], "g_RenderRatio") ~= nil) then
		    --CRatio = SText[i]
			if CRatio == "" then
			--CRatio = SText[i]
				SamplerPos = string.find(SText[i], "c", 1, true)
				if SamplerPos ~= nil then
				
					str = SText[i]
					len = 0
					for idx = SamplerPos + 1,  string.len(str) do
						units = string.byte(str, idx) - 48
						if((units < 0) or (units > 9)) then 
							break
						end
						len = len + 1					
					end
					CRatio = string.sub(SText[i], SamplerPos , SamplerPos + len)
				end
			end
		end
	end
	
	if eyePositionWS == nil then
		eyePositionWS = string.find(SText[i], "eyePositionWS")
	else
		if (eyePositionWS ~= nil) and (string.find(SText[i], "eyePositionWS") ~= nil) then
			--CeyePos = SText[i]
			if CeyePos == "" then
				SamplerPos = string.find(SText[i], "c", eyePositionWS + 12)
				if SamplerPos ~= nil then
					str = SText[i]
					len = 0
					for idx = SamplerPos + 1,  string.len(str) do
						units = string.byte(str, idx) - 48
						if((units < 0) or (units > 9)) then 
							break
						end
						len = len + 1					
					end
					CeyePos = string.sub(SText[i], SamplerPos, SamplerPos + len)
				end
			end
		end
	end
	
	if cameraFarMinusNear == nil then
		cameraFarMinusNear = string.find(SText[i], "cameraFarMinusNear")
	end
	
	if string.find(SText[i], "ps_3_0") ~= nil then
		break
	end
	x = x .. SText[i] .. "//"  .. SamplerName .. " CRatio: " .. CRatio .. " CeyePos: " .. CeyePos .. string.char(10)
 end

 


 
 --if isDone == false then
-- fix depth buffer
	if (GBufferDepth ~= nil) and (RenderRatio ~= nil) then
	isDone = true
	--x = " sgggggggggggggggffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff "
		for i = 1, #SText do
			AddNextStr = true
			
			if GBufferDepth ~= nil then
				
					lastdefpos = string.find(SText[i], "def")
					if lastdefpos ~= nil then
						defpos = i + 1
					end
	
					if (lastdefpos == nil) and (defpos ~= nil) then
						if i == defpos then
							x = x .. "   def c200, 0.0, 0.5, 0.0625, 0.5 " .. string.char(10)	
						end
						lastdclpos = string.find(SText[i], "dcl_2")
			
						if lastdclpos == nil then
							lastdclpos = string.find(SText[i], "dcl_cube")
						end
			
						if lastdclpos ~= nil then
							dclpos = i + 1
						end
		
						if (lastdclpos == nil) and (dclpos ~= nil) then
							if i == dclpos then
								x = x .. "   dcl_2d s14" .. string.char(10)	
								x = x .. "   dcl vPos.xy" .. string.char(10)
							end			
						end
					end
			end
			
			rpos, rposEnd = string.find(SText[i], CRatio.. ".x",1, true)
			if (rpos ~= nil) and (string.find(SText[i], "mul") ~= nil) then
				--mul r0.zw, r0, c17.x
				rpos = string.find(SText[i], "r")
				rposEnd = string.find(SText[i], ",", rpos, true)
				str = string.sub(SText[i], rpos, rposEnd - 1)
				AddNextStr = false
				x = x .. SText[i] .. string.char(10) 
				x = x .. string.char(10)
				x = x .. "    mov r11.xy, vPos.xy" .. string.char(10)
				x = x .. "    rcp r11.z, c210.x" .. string.char(10)
				x = x .. "    rcp r11.w, c210.y" .. string.char(10)
				x = x .. "    mul r11.xy, r11.xy, r11.zw" .. string.char(10)
				x = x .. "    mul r11.zw, r11.zw, c200.ww" .. string.char(10)
				
				
				--add r16.x, r16.x, r11.x
				
				if string.find(str, "xy") ~= nil then
					x = x .. "    add ".. str ..", r11.xy, r11.zw" .. string.char(10)
				else
					x = x .. "    add " .. str ..", r11.xyxy, r11.zwzw" .. string.char(10)					
				end
				x = x .. string.char(10)
			end
			
			if (cameraFarMinusNear ~= nil) and (CeyePos ~= "") then
			
				rpos, rposEnd = string.find(SText[i], CeyePos)
				if (rpos ~= nil) and (string.find(SText[i], "mad") ~= nil) then
				
					rpos = string.find(SText[i], "r")
					rposEnd = string.find(SText[i], ",", rpos, true)
					str = string.sub(SText[i], rpos, rposEnd - 1)
					
					AddNextStr = false
					x = x .. SText[i] .. string.char(10) 
					x = x .. string.char(10)
					
					x = x .. "mov r11.xyz, " .. str .. string.char(10)
	
					x = x .. "mul r10, c101, r11.y" .. string.char(10)
					x = x .. "mad r10, c100, r11.x, r10" .. string.char(10)
					x = x .. "mad r10, c102, r11.z, r10" .. string.char(10)
					x = x .. "add r10, r10, c103" .. string.char(10)
	
	
	
					x = x .. "texldl r14, c200.z, s14" .. string.char(10)
					x = x .. "add r14.y, r10.w, -r14.y" .. string.char(10)
	
					x = x .. "mul r14.x, r14.x, r14.y" .. string.char(10)
					--x = x .. "mul r14.x, r14.x, c200.w" .. string.char(10)
					x = x .. "add r10.x, r10.x, -r14.x" .. string.char(10)
					x = x .. "rcp r10.w, r10.w" .. string.char(10)
					x = x .. "mul r10.xyz, r10.xyz, r10.w" .. string.char(10)
	
					x = x .. "mul r12, c105, r10.y" .. string.char(10)
					x = x .. "mad r12, c104, r10.x, r12" .. string.char(10)
					x = x .. "mad r12, c106, r10.z, r12" .. string.char(10)
					x = x .. "add r12, r12, c107" .. string.char(10)
	
					x = x .. "rcp r12.w, r12.w" .. string.char(10)
					x = x .. "mul r12.xyz, r12.xyz, r12.w" .. string.char(10)
	
					x = x .. "mov " .. str ..", r12.xyz" .. string.char(10)
				
				end
			

			
			
			end
			
			
			if AddNextStr then
				x = x .. SText[i] .. string.char(10) 
				-- "//"  .. SamplerName .. " CRatio: " .. CRatio .. " CeyePos: " .. CeyePos .. string.char(10)
			end	
		end
		if isDone then
		x = x .. string.char(10) .. "//usepres"
	end
	end
--end


if isDone then
	return x
else
	return ""
end;