forked from bartvdbraak/blender
b9ce231060
More information in this post: http://code.blender.org/ Thanks to all contributes for giving their permission!
84 lines
2.7 KiB
C++
84 lines
2.7 KiB
C++
/*
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* Copyright 2011-2013 Blender Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License
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*/
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#ifndef __OSL_SHADER_H__
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#define __OSL_SHADER_H__
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#ifdef WITH_OSL
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/* OSL Shader Engine
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*
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* Holds all variables to execute and use OSL shaders from the kernel. These
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* are initialized externally by OSLShaderManager before rendering starts.
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*
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* Before/after a thread starts rendering, thread_init/thread_free must be
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* called, which will store any per thread OSL state in thread local storage.
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* This means no thread state must be passed along in the kernel itself.
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*/
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#include "kernel_types.h"
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CCL_NAMESPACE_BEGIN
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class Scene;
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struct ShaderClosure;
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struct ShaderData;
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struct differential3;
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struct KernelGlobals;
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struct OSLGlobals;
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struct OSLShadingSystem;
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class OSLShader {
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public:
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/* init */
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static void register_closures(OSLShadingSystem *ss);
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/* per thread data */
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static void thread_init(KernelGlobals *kg, KernelGlobals *kernel_globals, OSLGlobals *osl_globals);
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static void thread_free(KernelGlobals *kg);
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/* eval */
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static void eval_surface(KernelGlobals *kg, ShaderData *sd, float randb, int path_flag, ShaderContext ctx);
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static float3 eval_background(KernelGlobals *kg, ShaderData *sd, int path_flag, ShaderContext ctx);
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static void eval_volume(KernelGlobals *kg, ShaderData *sd, float randb, int path_flag, ShaderContext ctx);
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static void eval_displacement(KernelGlobals *kg, ShaderData *sd, ShaderContext ctx);
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/* sample & eval */
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static int bsdf_sample(const ShaderData *sd, const ShaderClosure *sc,
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float randu, float randv,
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float3& eval, float3& omega_in, differential3& domega_in, float& pdf);
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static float3 bsdf_eval(const ShaderData *sd, const ShaderClosure *sc,
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const float3& omega_in, float& pdf);
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static void bsdf_blur(ShaderClosure *sc, float roughness);
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static float3 emissive_eval(const ShaderData *sd, const ShaderClosure *sc);
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static float3 volume_eval_phase(const ShaderClosure *sc,
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const float3 omega_in, const float3 omega_out);
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/* attributes */
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static int find_attribute(KernelGlobals *kg, const ShaderData *sd, uint id, AttributeElement *elem);
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};
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CCL_NAMESPACE_END
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#endif
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#endif /* __OSL_SHADER_H__ */
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