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/*
* Copyright 2011-2013 Blender Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __OSL_SHADER_H__
#define __OSL_SHADER_H__
#ifdef WITH_OSL
/* OSL Shader Engine
*
* Holds all variables to execute and use OSL shaders from the kernel. These
* are initialized externally by OSLShaderManager before rendering starts.
*
* Before/after a thread starts rendering, thread_init/thread_free must be
* called, which will store any per thread OSL state in thread local storage.
* This means no thread state must be passed along in the kernel itself.
*/
#include "kernel/kernel_types.h"
CCL_NAMESPACE_BEGIN
class Scene;
struct ShaderClosure;
struct ShaderData;
struct differential3;
struct KernelGlobals;
struct OSLGlobals;
struct OSLShadingSystem;
class OSLShader {
public:
/* init */
static void register_closures(OSLShadingSystem *ss);
/* per thread data */
static void thread_init(KernelGlobals *kg, KernelGlobals *kernel_globals, OSLGlobals *osl_globals);
static void thread_free(KernelGlobals *kg);
/* eval */
static void eval_surface(KernelGlobals *kg, ShaderData *sd, PathState *state, int path_flag, ShaderContext ctx);
static void eval_background(KernelGlobals *kg, ShaderData *sd, PathState *state, int path_flag, ShaderContext ctx);
static void eval_volume(KernelGlobals *kg, ShaderData *sd, PathState *state, int path_flag, ShaderContext ctx);
static void eval_displacement(KernelGlobals *kg, ShaderData *sd, ShaderContext ctx);
/* attributes */
static int find_attribute(KernelGlobals *kg, const ShaderData *sd, uint id, AttributeDescriptor *desc);
};
CCL_NAMESPACE_END
#endif
#endif /* __OSL_SHADER_H__ */
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