51 lines
1.4 KiB
HLSL
51 lines
1.4 KiB
HLSL
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// HMS MediaEngine – Gaussian Blur, vertikaler Pass (separable)
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// Identisch zu horizontal.hlsl mit texel = (0, 1).
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Texture2D u_input_texture : register(t0);
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SamplerState u_sampler : register(s0);
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cbuffer hms_params : register(b0)
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{
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float4 u_resolution;
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float u_time_seconds;
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float u_delta_seconds;
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float u_frame_index;
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float u_layer_opacity;
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float u_audio_rms;
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float u_audio_peak;
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float u_audio_bass;
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float u_audio_mid;
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float u_audio_treble;
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float u_audio_beat;
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float param_radius;
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float u_quality_samples;
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float _pad0;
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float _pad1;
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};
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float4 mainPS(float4 pos : SV_POSITION, float2 uv : TEXCOORD0) : SV_Target
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{
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float radius = max(param_radius, 0.0);
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float4 src = u_input_texture.Sample(u_sampler, uv);
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if (radius < 0.01)
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{
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return src;
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}
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float samples = clamp(u_quality_samples, 1.0, 17.0);
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float stepSize = radius / max(samples - 1.0, 1.0);
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float2 texel = float2(0.0, 1.0) / u_resolution.xy;
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float4 acc = float4(0.0, 0.0, 0.0, 0.0);
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float total = 0.0;
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[loop]
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for (float i = 0.0; i < samples; i += 1.0)
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{
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float t = i - (samples - 1.0) * 0.5;
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float w = exp(-(t * t) / (samples * 0.5));
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acc += u_input_texture.Sample(u_sampler, uv + texel * (t * stepSize)) * w;
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total += w;
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}
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return acc / total;
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}
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