Is it possible to calculate the mouse velocity?

	texture _mPos { Width=1; Height=1; Format=RGBA32F; };
	sampler2D _sPos { Texture=_mPos; };
	
	texture _vel { Width=1; Height=1; Format=RGBA32F; };
	sampler2D _sVel { Texture=_vel; };
		
	struct v2f {
		float4 pos : SV_Position;
		float2 uv  : TEXCOORD0;
	};
	
	float2 StoreMousePos() : SV_Target {
		return ReShade::MouseCoords;
	}
	
	float2 CalculateVelocity() : SV_Target {
		float2 lastPos = (	tex2Dfetch(_sPos, float2(0,0)).x,
							tex2Dfetch(_sPos, float2(0,0)).y
		);
		float2 mousePos = ReShade::MouseCoords;
		return float2(lastPos - mousePos) / ReShade::FrameTime;
	}
	
	float4 Blur(float2 scale, float4 tex, float2 coord) {
		float4 color = tex;
		
		for(int i = 0; i < 6; ++i) { 
			float2 srcCoord = coord + float2(i * ReShade::PixelSize.x * scale.x, i * ReShade::PixelSize.y * scale.y);
			color += tex2D(ReShade::BackBuffer, srcCoord);
			srcCoord = coord - float2(i * ReShade::PixelSize.x * scale.x, i * ReShade::PixelSize.y * scale.y);
			color += tex2D(ReShade::BackBuffer, srcCoord);
		}
		
		return color/10;
	}
	
	float4 MotionBlur(v2f i) : SV_Target {
		float2 velocity = (	tex2Dfetch(_sVel, float2(0,0)).x,
							tex2Dfetch(_sVel, float2(0,0)).y
		);
		float4 col = Blur(velocity, tex2D(ReShade::BackBuffer, i.uv), i.uv.xy);
		return col;
	}
	
	technique Bloom_Tech <bool enabled = RESHADE_START_ENABLED; int toggle = PBRBloom_ToggleKey; > {
		
		pass storeMousePos {
			VertexShader = ReShade::VS_PostProcess;
			PixelShader = StoreMousePos;
			RenderTarget = _mPos;
		}
		
		pass calcVelocity{
			VertexShader = ReShade::VS_PostProcess;
			PixelShader = CalculateVelocity;
			RenderTarget = _vel;
		}
		
		pass motionBlur {
			VertexShader = ReShade::VS_PostProcess;
			PixelShader = MotionBlur;
		}
	}