Patrick Mours
bfb6fce659
Adds support for building multiple BVH types in order to support using both CPU and OptiX devices for rendering simultaneously. Primitive packing for Embree and OptiX is now standalone, so it only needs to be run once and can be shared between the two. Additionally, BVH building was made a device call, so that each device backend can decide how to perform the building. The multi-device for instance creates a special multi-BVH that holds references to several sub-BVHs, one for each sub-device. Reviewed By: brecht, kevindietrich Differential Revision: https://developer.blender.org/D9718
118 lines
3.4 KiB
C++
118 lines
3.4 KiB
C++
/*
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* Adapted from code copyright 2009-2010 NVIDIA Corporation
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* Modifications Copyright 2011, 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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#include "bvh/bvh.h"
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#include "bvh/bvh2.h"
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#include "bvh/bvh_embree.h"
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#include "bvh/bvh_multi.h"
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#include "bvh/bvh_optix.h"
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#include "util/util_logging.h"
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#include "util/util_progress.h"
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CCL_NAMESPACE_BEGIN
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/* BVH Parameters. */
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const char *bvh_layout_name(BVHLayout layout)
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{
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switch (layout) {
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case BVH_LAYOUT_NONE:
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return "NONE";
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case BVH_LAYOUT_BVH2:
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return "BVH2";
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case BVH_LAYOUT_EMBREE:
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return "EMBREE";
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case BVH_LAYOUT_OPTIX:
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return "OPTIX";
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case BVH_LAYOUT_MULTI_OPTIX:
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case BVH_LAYOUT_MULTI_OPTIX_EMBREE:
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return "MULTI";
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case BVH_LAYOUT_ALL:
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return "ALL";
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}
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LOG(DFATAL) << "Unsupported BVH layout was passed.";
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return "";
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}
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BVHLayout BVHParams::best_bvh_layout(BVHLayout requested_layout, BVHLayoutMask supported_layouts)
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{
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const BVHLayoutMask requested_layout_mask = (BVHLayoutMask)requested_layout;
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/* Check whether requested layout is supported, if so -- no need to do
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* any extra computation.
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*/
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if (supported_layouts & requested_layout_mask) {
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return requested_layout;
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}
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/* Some bit magic to get widest supported BVH layout. */
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/* This is a mask of supported BVH layouts which are narrower than the
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* requested one.
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*/
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BVHLayoutMask allowed_layouts_mask = (supported_layouts & (requested_layout_mask - 1));
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/* If the requested layout is not supported, choose from the supported layouts instead. */
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if (allowed_layouts_mask == 0) {
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allowed_layouts_mask = supported_layouts;
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}
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/* We get widest from allowed ones and convert mask to actual layout. */
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const BVHLayoutMask widest_allowed_layout_mask = __bsr(allowed_layouts_mask);
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return (BVHLayout)(1 << widest_allowed_layout_mask);
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}
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/* BVH */
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BVH::BVH(const BVHParams ¶ms_,
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const vector<Geometry *> &geometry_,
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const vector<Object *> &objects_)
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: params(params_), geometry(geometry_), objects(objects_)
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{
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}
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BVH *BVH::create(const BVHParams ¶ms,
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const vector<Geometry *> &geometry,
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const vector<Object *> &objects,
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Device *device)
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{
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switch (params.bvh_layout) {
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case BVH_LAYOUT_BVH2:
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return new BVH2(params, geometry, objects);
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case BVH_LAYOUT_EMBREE:
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#ifdef WITH_EMBREE
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return new BVHEmbree(params, geometry, objects);
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#else
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break;
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#endif
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case BVH_LAYOUT_OPTIX:
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#ifdef WITH_OPTIX
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return new BVHOptiX(params, geometry, objects, device);
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#else
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(void)device;
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break;
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#endif
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case BVH_LAYOUT_MULTI_OPTIX:
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case BVH_LAYOUT_MULTI_OPTIX_EMBREE:
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return new BVHMulti(params, geometry, objects);
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case BVH_LAYOUT_NONE:
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case BVH_LAYOUT_ALL:
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break;
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}
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LOG(DFATAL) << "Requested unsupported BVH layout.";
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return NULL;
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}
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CCL_NAMESPACE_END
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