127 lines
3.7 KiB
HLSL
127 lines
3.7 KiB
HLSL
#ifndef UNIVERSAL_LIGHT_COOKIE_INPUT_INCLUDED
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#define UNIVERSAL_LIGHT_COOKIE_INPUT_INCLUDED
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#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/GlobalSamplers.hlsl"
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#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/LightCookie/LightCookieTypes.hlsl"
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// Textures
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TEXTURE2D(_MainLightCookieTexture);
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TEXTURE2D(_AdditionalLightsCookieAtlasTexture);
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// Samplers
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SAMPLER(sampler_MainLightCookieTexture);
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// Buffers
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// GLES3 causes a performance regression in some devices when using CBUFFER.
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#ifndef SHADER_API_GLES3
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CBUFFER_START(LightCookies)
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#endif
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float4x4 _MainLightWorldToLight;
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float _AdditionalLightsCookieEnableBits[(MAX_VISIBLE_LIGHTS + 31) / 32];
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float _MainLightCookieTextureFormat;
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float _AdditionalLightsCookieAtlasTextureFormat;
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#if !USE_STRUCTURED_BUFFER_FOR_LIGHT_DATA
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float4x4 _AdditionalLightsWorldToLights[MAX_VISIBLE_LIGHTS];
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float4 _AdditionalLightsCookieAtlasUVRects[MAX_VISIBLE_LIGHTS]; // (xy: uv size, zw: uv offset)
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float _AdditionalLightsLightTypes[MAX_VISIBLE_LIGHTS];
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#endif
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#ifndef SHADER_API_GLES3
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CBUFFER_END
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#endif
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#if USE_STRUCTURED_BUFFER_FOR_LIGHT_DATA
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StructuredBuffer<float4x4> _AdditionalLightsWorldToLightBuffer;
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StructuredBuffer<float4> _AdditionalLightsCookieAtlasUVRectBuffer; // UV rect into light cookie atlas (xy: uv offset, zw: uv size)
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StructuredBuffer<float> _AdditionalLightsLightTypeBuffer;
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#endif
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// Data Getters
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float4x4 GetLightCookieWorldToLightMatrix(int lightIndex)
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{
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#if USE_STRUCTURED_BUFFER_FOR_LIGHT_DATA
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return _AdditionalLightsWorldToLightBuffer[lightIndex];
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#else
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return _AdditionalLightsWorldToLights[lightIndex];
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#endif
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}
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float4 GetLightCookieAtlasUVRect(int lightIndex)
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{
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#if USE_STRUCTURED_BUFFER_FOR_LIGHT_DATA
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return _AdditionalLightsCookieAtlasUVRectBuffer[lightIndex];
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#else
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return _AdditionalLightsCookieAtlasUVRects[lightIndex];
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#endif
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}
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int GetLightCookieLightType(int lightIndex)
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{
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#if USE_STRUCTURED_BUFFER_FOR_LIGHT_DATA
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return _AdditionalLightsLightTypeBuffer[lightIndex];
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#else
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return _AdditionalLightsLightTypes[lightIndex];
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#endif
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}
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bool IsMainLightCookieTextureRGBFormat()
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{
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return _MainLightCookieTextureFormat == URP_LIGHT_COOKIE_FORMAT_RGB;
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}
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bool IsMainLightCookieTextureAlphaFormat()
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{
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return _MainLightCookieTextureFormat == URP_LIGHT_COOKIE_FORMAT_ALPHA;
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}
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bool IsAdditionalLightsCookieAtlasTextureRGBFormat()
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{
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return _AdditionalLightsCookieAtlasTextureFormat == URP_LIGHT_COOKIE_FORMAT_RGB;
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}
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bool IsAdditionalLightsCookieAtlasTextureAlphaFormat()
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{
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return _AdditionalLightsCookieAtlasTextureFormat == URP_LIGHT_COOKIE_FORMAT_ALPHA;
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}
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// Sampling
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real4 SampleMainLightCookieTexture(float2 uv)
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{
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return SAMPLE_TEXTURE2D(_MainLightCookieTexture, sampler_MainLightCookieTexture, uv);
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}
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real4 SampleAdditionalLightsCookieAtlasTexture(float2 uv)
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{
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// No mipmap support
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return SAMPLE_TEXTURE2D_LOD(_AdditionalLightsCookieAtlasTexture, sampler_LinearClamp, uv, 0);
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}
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// Helpers
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bool IsMainLightCookieEnabled()
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{
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return _MainLightCookieTextureFormat != URP_LIGHT_COOKIE_FORMAT_NONE;
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}
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bool IsLightCookieEnabled(int lightBufferIndex)
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{
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#if 0
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float4 uvRect = GetLightCookieAtlasUVRect(lightBufferIndex);
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return any(uvRect != 0);
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#else
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// 2^5 == 32, bit mask for a float/uint.
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uint elemIndex = ((uint)lightBufferIndex) >> 5;
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uint bitOffset = (uint)lightBufferIndex & ((1 << 5) - 1);
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#if USE_STRUCTURED_BUFFER_FOR_LIGHT_DATA
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uint elem = asuint(_AdditionalLightsCookieEnableBitsBuffer[elemIndex]);
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#else
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uint elem = asuint(_AdditionalLightsCookieEnableBits[elemIndex]);
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#endif
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return (elem & (1u << bitOffset)) != 0u;
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#endif
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}
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#endif //UNIVERSAL_LIGHT_COOKIE_INPUT_INCLUDED
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