46 lines
1.6 KiB
HLSL
46 lines
1.6 KiB
HLSL
#ifndef MBLUR_H
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#define MBLUR_H
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#ifndef USE_MBLUR
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float3 mblur(float2 UV, float3 pos, float3 c_original)
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{
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return c_original;
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}
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#else
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#include "common.hlsli"
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uniform float4x4 m_current;
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uniform float4x4 m_previous;
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uniform float2 m_blur; // scale_x / 12, scale_y / 12
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#define MBLUR_SAMPLES float(12.0f)
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#define MBLUR_CLAMP float(0.001f)
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float3 mblur(float2 UV, float3 pos, float3 c_original)
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{
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float4 pos4 = float4(pos, 1.0f);
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float4 p_current = mul(m_current, pos4);
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float4 p_previous = mul(m_previous, pos4);
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float2 p_velocity = m_blur * ((p_current.xy / p_current.w) - (p_previous.xy / p_previous.w));
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p_velocity = clamp(p_velocity, -MBLUR_CLAMP, +MBLUR_CLAMP);
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// For each sample, sum up each sample's color in "Blurred" and then divide
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// to average the color after all the samples are added.
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float3 blurred = c_original;
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blurred += tex2D(s_image, p_velocity * 1.h + UV).rgb;
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blurred += tex2D(s_image, p_velocity * 2.h + UV).rgb;
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blurred += tex2D(s_image, p_velocity * 3.h + UV).rgb;
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blurred += tex2D(s_image, p_velocity * 4.h + UV).rgb;
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blurred += tex2D(s_image, p_velocity * 5.h + UV).rgb;
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blurred += tex2D(s_image, p_velocity * 6.h + UV).rgb;
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blurred += tex2D(s_image, p_velocity * 7.h + UV).rgb;
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blurred += tex2D(s_image, p_velocity * 8.h + UV).rgb;
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blurred += tex2D(s_image, p_velocity * 9.h + UV).rgb;
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blurred += tex2D(s_image, p_velocity * 10.h + UV).rgb;
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blurred += tex2D(s_image, p_velocity * 11.h + UV).rgb;
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return blurred / MBLUR_SAMPLES;
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}
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#endif
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#endif
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