Sergey Sharybin
709041ed0b
Summary:
Made objects update happening from multiple threads. It is a task-based
scheduling system which uses current dependency graph for spawning new
tasks. This means threading happens on object level, but the system is
flexible enough for higher granularity.
Technical details:
- Uses task scheduler which was recently committed to trunk
(that one which Brecht ported from Cycles).
- Added two utility functions to dependency graph:
* DAG_threaded_update_begin, which is called to initialize threaded
objects update. It will also schedule root DAG node to the queue,
hence starting evaluation process.
Initialization will calculate how much parents are to be evaluation
before current DAG node can be scheduled. This value is used by task
threads for faster detecting which nodes might be scheduled.
* DAG_threaded_update_handle_node_updated which is called from task
thread function when node was fully handled.
This function decreases num_pending_parents of node children and
schedules children with zero valency.
As it might have become clear, task thread receives DAG nodes and
decides which callback to call for it.
Currently only BKE_object_handle_update is called for object nodes.
In the future it'll call node->callback() from Ali's new DAG.
- This required adding some workarounds to the render pipeline.
Mainly to stop using get_object_dm() from modifiers' apply callback.
Such a call was only a workaround for dependency graph glitch when
rendering scene with, say, boolean modifiers before displaying
this scene.
Such change moves workaround from one place to another, so overall
hackentropy remains the same.
- Added paradigm of EvaluaitonContext. Currently it's more like just a
more reliable replacement for G.is_rendering which fails in some
circumstances.
Future idea of this context is to also store all the local data needed
for objects evaluation such as local time, Copy-on-Write data and so.
There're two types of EvaluationContext:
* Context used for viewport updated and owned by Main. In the future
this context might be easily moved to Window or Screen to allo
per-window/per-screen local time.
* Context used by render engines to evaluate objects for render purposes.
Render engine is an owner of this context.
This context is passed to all object update routines.
Reviewers: brecht, campbellbarton
Reviewed By: brecht
CC: lukastoenne
Differential Revision: https://developer.blender.org/D94
113 lines
3.0 KiB
C++
113 lines
3.0 KiB
C++
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
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* All rights reserved.
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*
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* The Original Code is: all of this file.
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*
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* Contributor(s): none yet.
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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#ifndef __BKE_MAIN_H__
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#define __BKE_MAIN_H__
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/** \file BKE_main.h
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* \ingroup bke
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* \since March 2001
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* \author nzc
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* \section aboutmain Main struct
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* Main is the root of the 'database' of a Blender context. All data
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* is stuffed into lists, and all these lists are knotted to here. A
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* Blender file is not much more but a binary dump of these
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* lists. This list of lists is not serialized itself.
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*
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* Oops... this should be a _types.h file.
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*
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*/
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#include "DNA_listBase.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct EvaluationContext;
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struct Library;
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typedef struct Main {
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struct Main *next, *prev;
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char name[1024]; /* 1024 = FILE_MAX */
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short versionfile, subversionfile; /* see BLENDER_VERSION, BLENDER_SUBVERSION */
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short minversionfile, minsubversionfile;
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uint64_t build_commit_timestamp; /* commit's timestamp from buildinfo */
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char build_hash[16]; /* hash from buildinfo */
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short recovered; /* indicate the main->name (file) is the recovered one */
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struct Library *curlib;
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ListBase scene;
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ListBase library;
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ListBase object;
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ListBase mesh;
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ListBase curve;
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ListBase mball;
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ListBase mat;
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ListBase tex;
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ListBase image;
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ListBase latt;
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ListBase lamp;
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ListBase camera;
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ListBase ipo; // XXX deprecated
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ListBase key;
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ListBase world;
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ListBase screen;
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ListBase script;
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ListBase vfont;
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ListBase text;
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ListBase speaker;
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ListBase sound;
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ListBase group;
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ListBase armature;
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ListBase action;
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ListBase nodetree;
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ListBase brush;
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ListBase particle;
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ListBase wm;
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ListBase gpencil;
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ListBase movieclip;
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ListBase mask;
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ListBase linestyle;
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char id_tag_update[256];
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/* Evaluation context used by viewport */
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struct EvaluationContext *eval_ctx;
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} Main;
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#define MAIN_VERSION_ATLEAST(main, ver, subver) \
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((main)->versionfile > (ver) || (main->versionfile == (ver) && (main)->subversionfile >= (subver)))
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#define MAIN_VERSION_OLDER(main, ver, subver) \
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((main)->versionfile < (ver) || (main->versionfile == (ver) && (main)->subversionfile < (subver)))
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#ifdef __cplusplus
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}
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#endif
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#endif /* __BKE_MAIN_H__ */
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