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/*
* Adapted from code copyright 2009-2010 NVIDIA Corporation
* Modifications Copyright 2011, 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.
*/
#include "bvh/bvh.h"
#include "bvh/bvh2.h"
#include "bvh/embree.h"
#include "bvh/metal.h"
#include "bvh/multi.h"
#include "bvh/optix.h"
#include "util/log.h"
#include "util/progress.h"
CCL_NAMESPACE_BEGIN
/* BVH Parameters. */
const char *bvh_layout_name(BVHLayout layout)
{
switch (layout) {
case BVH_LAYOUT_NONE:
return "NONE";
case BVH_LAYOUT_BVH2:
return "BVH2";
case BVH_LAYOUT_EMBREE:
return "EMBREE";
case BVH_LAYOUT_OPTIX:
return "OPTIX";
case BVH_LAYOUT_METAL:
return "METAL";
case BVH_LAYOUT_MULTI_OPTIX:
case BVH_LAYOUT_MULTI_METAL:
case BVH_LAYOUT_MULTI_OPTIX_EMBREE:
case BVH_LAYOUT_MULTI_METAL_EMBREE:
return "MULTI";
case BVH_LAYOUT_ALL:
return "ALL";
}
LOG(DFATAL) << "Unsupported BVH layout was passed.";
return "";
}
BVHLayout BVHParams::best_bvh_layout(BVHLayout requested_layout, BVHLayoutMask supported_layouts)
{
const BVHLayoutMask requested_layout_mask = (BVHLayoutMask)requested_layout;
/* Check whether requested layout is supported, if so -- no need to do
* any extra computation.
*/
if (supported_layouts & requested_layout_mask) {
return requested_layout;
}
/* Some bit magic to get widest supported BVH layout. */
/* This is a mask of supported BVH layouts which are narrower than the
* requested one.
*/
BVHLayoutMask allowed_layouts_mask = (supported_layouts & (requested_layout_mask - 1));
/* If the requested layout is not supported, choose from the supported layouts instead. */
if (allowed_layouts_mask == 0) {
allowed_layouts_mask = supported_layouts;
}
/* We get widest from allowed ones and convert mask to actual layout. */
const BVHLayoutMask widest_allowed_layout_mask = __bsr((uint32_t)allowed_layouts_mask);
return (BVHLayout)(1 << widest_allowed_layout_mask);
}
/* BVH */
BVH::BVH(const BVHParams ¶ms_,
const vector<Geometry *> &geometry_,
const vector<Object *> &objects_)
: params(params_), geometry(geometry_), objects(objects_)
{
}
BVH *BVH::create(const BVHParams ¶ms,
const vector<Geometry *> &geometry,
const vector<Object *> &objects,
Device *device)
{
switch (params.bvh_layout) {
case BVH_LAYOUT_BVH2:
return new BVH2(params, geometry, objects);
case BVH_LAYOUT_EMBREE:
#ifdef WITH_EMBREE
return new BVHEmbree(params, geometry, objects);
#else
break;
#endif
case BVH_LAYOUT_OPTIX:
#ifdef WITH_OPTIX
return new BVHOptiX(params, geometry, objects, device);
#else
(void)device;
break;
#endif
case BVH_LAYOUT_METAL:
#ifdef WITH_METAL
return bvh_metal_create(params, geometry, objects, device);
#else
(void)device;
break;
#endif
case BVH_LAYOUT_MULTI_OPTIX:
case BVH_LAYOUT_MULTI_METAL:
case BVH_LAYOUT_MULTI_OPTIX_EMBREE:
case BVH_LAYOUT_MULTI_METAL_EMBREE:
return new BVHMulti(params, geometry, objects);
case BVH_LAYOUT_NONE:
case BVH_LAYOUT_ALL:
break;
}
LOG(DFATAL) << "Requested unsupported BVH layout.";
return NULL;
}
CCL_NAMESPACE_END
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