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include/nbl/builtin/hlsl/concepts/accessors/loadable_image.hlsl
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Also @Przemog1 you have those to do In
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include/nbl/builtin/hlsl/concepts/accessors/loadable_image.hlsl
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| const SplattingParameters::scalar_t baseRootOfStart = splattingParameters.baseRootOfStart(); | ||
| const SplattingParameters::scalar_t rcpLog2Base = splattingParameters.rcpLog2Base(); | ||
| const SplattingParameters::scalar_t luma = splattingParameters.calcLuma<input_sample_type>(_sample); | ||
| const SplattingParameters::scalar_t log2Luma = log2<SplattingParameters::scalar_t>(luma); | ||
| const SplattingParameters::scalar_t log2BaseRootOfStart = log2<SplattingParameters::scalar_t>(baseRootOfStart); | ||
| const SplattingParameters::scalar_t cascade = log2Luma * rcpLog2Base - log2BaseRootOfStart; | ||
| const SplattingParameters::scalar_t lastCascade = cascade_count - 1u; | ||
| const SplattingParameters::scalar_t clampedCascade = clamp(cascade, 0, lastCascade); | ||
| // c<=0 -> 0, c>=Count-1 -> Count-1 | ||
| uint32_t lowerCascadeIndex = floor<cascade_layer_scalar_type>(cascade); | ||
| uint16_t lowerCascadeIndex = uint16_t(floor<SplattingParameters::scalar_t>(clampedCascade)); | ||
| // 0 whenever clamped or `cascade` is integer (when `clampedCascade` is integer) | ||
| cascade_layer_scalar_type higherCascadeWeight = clampedCascade - floor<cascade_layer_scalar_type>(clampedCascade); | ||
| SplattingParameters::scalar_t higherCascadeWeight = clampedCascade - floor<SplattingParameters::scalar_t>(clampedCascade); | ||
| // never 0 thanks to magic of `1-fract(x)` | ||
| cascade_layer_scalar_type lowerCascadeWeight = cascade_layer_scalar_type(1) - higherCascadeWeight; | ||
| SplattingParameters::scalar_t lowerCascadeWeight = SplattingParameters::scalar_t(1) - higherCascadeWeight; | ||
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| // handle super bright sample case | ||
| if (cascade > CascadeCount - 1) | ||
| lowerCascadeWeight = exp2(log2Start + log2Base * (CascadeCount - 1) - log2Luma); | ||
| if (cascade > lastCascade) | ||
| lowerCascadeWeight = exp2((log2BaseRootOfStart + lastCascade) / rcpLog2Base - log2Luma); |
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I need this optimized and better splattingParameters members, like this (log2BaseRootOfStart + lastCascade) / rcpLog2Base is essentially a constant
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| retval.Log2BaseRootOfStart = log2<scalar_t>(unpacked[0]); | ||
| retval.BrightSampleLumaBias = (retval.Log2BaseRootOfStart + LastCascade) / retval.RcpLog2Base; |
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no, this is what I want STORED by the CPU, doing any part of this on GPU doesn't help
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basically two more float16 are needed
include/nbl/builtin/hlsl/concepts/accessors/anisotropically_sampled.hlsl
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include/nbl/builtin/hlsl/concepts/accessors/anisotropically_sampled.hlsl
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include/nbl/builtin/hlsl/concepts/accessors/loadable_image.hlsl
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| int32_t PackedLog2; | ||
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| scalar_t rcpLog2Base() | ||
| { | ||
| return unpackedLog2Parameters()[1]; | ||
| } | ||
| // float16_t log2BaseRootOfStart; 2 | ||
| // float16_t brightSampleLumaBias; 3 | ||
| // pack as Half2x16 | ||
| int32_t PackedPrecomputed; |
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old PR:
#964