d832d993c5
These replace float3 and packed_float3 in various places in the kernel where a spectral color representation will be used in the future. That representation will require more than 3 channels and conversion to from/RGB. The kernel code was refactored to remove the assumption that Spectrum and RGB colors are the same thing. There are no functional changes, Spectrum is still a float3 and the conversion functions are no-ops. Differential Revision: https://developer.blender.org/D15535
78 lines
1.9 KiB
C++
78 lines
1.9 KiB
C++
/* SPDX-License-Identifier: BSD-3-Clause
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*
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* Adapted from Open Shading Language
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* Copyright (c) 2009-2010 Sony Pictures Imageworks Inc., et al.
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* All Rights Reserved.
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*
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* Modifications Copyright 2011-2022 Blender Foundation. */
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#include <OpenImageIO/fmath.h>
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#include <OSL/genclosure.h>
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#include "kernel/osl/closures.h"
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// clang-format off
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#include "kernel/device/cpu/compat.h"
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#include "kernel/device/cpu/globals.h"
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#include "kernel/closure/alloc.h"
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#include "kernel/closure/emissive.h"
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#include "kernel/util/color.h"
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// clang-format on
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CCL_NAMESPACE_BEGIN
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using namespace OSL;
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/// Generic background closure
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///
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/// We only have a background closure for the shaders
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/// to return a color in background shaders. No methods,
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/// only the weight is taking into account
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///
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class GenericBackgroundClosure : public CClosurePrimitive {
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public:
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void setup(ShaderData *sd, uint32_t /* path_flag */, float3 weight)
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{
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background_setup(sd, rgb_to_spectrum(weight));
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}
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};
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/// Holdout closure
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///
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/// This will be used by the shader to mark the
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/// amount of holdout for the current shading
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/// point. No parameters, only the weight will be
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/// used
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///
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class HoldoutClosure : CClosurePrimitive {
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public:
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void setup(ShaderData *sd, uint32_t /* path_flag */, float3 weight)
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{
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closure_alloc(sd, sizeof(ShaderClosure), CLOSURE_HOLDOUT_ID, rgb_to_spectrum(weight));
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sd->flag |= SD_HOLDOUT;
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}
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};
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ClosureParam *closure_background_params()
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{
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static ClosureParam params[] = {
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CLOSURE_STRING_KEYPARAM(GenericBackgroundClosure, label, "label"),
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CLOSURE_FINISH_PARAM(GenericBackgroundClosure)};
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return params;
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}
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CCLOSURE_PREPARE(closure_background_prepare, GenericBackgroundClosure)
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ClosureParam *closure_holdout_params()
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{
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static ClosureParam params[] = {CLOSURE_FINISH_PARAM(HoldoutClosure)};
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return params;
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}
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CCLOSURE_PREPARE(closure_holdout_prepare, HoldoutClosure)
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CCL_NAMESPACE_END
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