From dc2df8307f41888bab722f75fa9e73adecf86b72 Mon Sep 17 00:00:00 2001 From: Julian Eisel Date: Tue, 17 Mar 2020 20:20:55 +0100 Subject: VR: Initial Virtual Reality support - Milestone 1, Scene Inspection NOTE: While most of the milestone 1 goals are there, a few smaller features and improvements are still to be done. Big picture of this milestone: Initial, OpenXR-based virtual reality support for users and foundation for advanced use cases. Maniphest Task: https://developer.blender.org/T71347 The tasks contains more information about this milestone. To be clear: This is not a feature rich VR implementation, it's focused on the initial scene inspection use case. We intentionally focused on that, further features like controller support are part of the next milestone. - How to use? Instructions on how to use this are here: https://wiki.blender.org/wiki/User:Severin/GSoC-2019/How_to_Test These will be updated and moved to a more official place (likely the manual) soon. Currently Windows Mixed Reality and Oculus devices are usable. Valve/HTC headsets don't support the OpenXR standard yet and hence, do not work with this implementation. --------------- This is the C-side implementation of the features added for initial VR support as per milestone 1. A "VR Scene Inspection" Add-on will be committed separately, to expose the VR functionality in the UI. It also adds some further features for milestone 1, namely a landmarking system (stored view locations in the VR space) Main additions/features: * Support for rendering viewports to an HMD, with good performance. * Option to sync the VR view perspective with a fully interactive, regular 3D View (VR-Mirror). * Option to disable positional tracking. Keeps the current position (calculated based on the VR eye center pose) when enabled while a VR session is running. * Some regular viewport settings for the VR view * RNA/Python-API to query and set VR session state information. * WM-XR: Layer tying Ghost-XR to the Blender specific APIs/data * wmSurface API: drawable, non-window container (manages Ghost-OpenGL and GPU context) * DNA/RNA for management of VR session settings * `--debug-xr` and `--debug-xr-time` commandline options * Utility batch & config file for using the Oculus runtime on Windows. * Most VR data is runtime only. The exception is user settings which are saved to files (`XrSessionSettings`). * VR support can be disabled through the `WITH_XR_OPENXR` compiler flag. For architecture and code documentation, see https://wiki.blender.org/wiki/Source/Interface/XR. --------------- A few thank you's: * A huge shoutout to Ray Molenkamp for his help during the project - it would have not been that successful without him! * Sebastian Koenig and Simeon Conzendorf for testing and feedback! * The reviewers, especially Brecht Van Lommel! * Dalai Felinto for pushing and managing me to get this done ;) * The OpenXR working group for providing an open standard. I think we're the first bigger application to adopt OpenXR. Congratulations to them and ourselves :) This project started as a Google Summer of Code 2019 project - "Core Support of Virtual Reality Headsets through OpenXR" (see https://wiki.blender.org/wiki/User:Severin/GSoC-2019/). Some further information, including ideas for further improvements can be found in the final GSoC report: https://wiki.blender.org/wiki/User:Severin/GSoC-2019/Final_Report Differential Revisions: D6193, D7098 Reviewed by: Brecht Van Lommel, Jeroen Bakker --- source/blender/windowmanager/intern/wm_surface.c | 118 +++++++++++++++++++++++ 1 file changed, 118 insertions(+) create mode 100644 source/blender/windowmanager/intern/wm_surface.c (limited to 'source/blender/windowmanager/intern/wm_surface.c') diff --git a/source/blender/windowmanager/intern/wm_surface.c b/source/blender/windowmanager/intern/wm_surface.c new file mode 100644 index 00000000000..cb575cc8f7d --- /dev/null +++ b/source/blender/windowmanager/intern/wm_surface.c @@ -0,0 +1,118 @@ +/* + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +/** \file + * \ingroup wm + */ + +#include "BKE_context.h" + +#include "BLF_api.h" + +#include "BLI_listbase.h" +#include "BLI_threads.h" + +#include "GHOST_C-api.h" + +#include "GPU_batch_presets.h" +#include "GPU_framebuffer.h" +#include "GPU_immediate.h" +#include "GPU_context.h" + +#include "MEM_guardedalloc.h" + +#include "WM_types.h" +#include "WM_api.h" +#include "wm.h" + +#include "wm_surface.h" + +static ListBase global_surface_list = {NULL, NULL}; +static wmSurface *g_drawable = NULL; + +void wm_surfaces_iter(bContext *C, void (*cb)(bContext *C, wmSurface *)) +{ + for (wmSurface *surf = global_surface_list.first; surf; surf = surf->next) { + cb(C, surf); + } +} + +void wm_surface_clear_drawable(void) +{ + if (g_drawable) { + BLF_batch_reset(); + gpu_batch_presets_reset(); + immDeactivate(); + + g_drawable = NULL; + } +} + +void wm_surface_set_drawable(wmSurface *surface, bool activate) +{ + BLI_assert(ELEM(g_drawable, NULL, surface)); + + g_drawable = surface; + if (activate) { + GHOST_ActivateOpenGLContext(surface->ghost_ctx); + } + + GPU_context_active_set(surface->gpu_ctx); + immActivate(); +} + +void wm_surface_make_drawable(wmSurface *surface) +{ + BLI_assert(GPU_framebuffer_active_get() == NULL); + + if (surface != g_drawable) { + wm_surface_clear_drawable(); + wm_surface_set_drawable(surface, true); + } +} + +void wm_surface_reset_drawable(void) +{ + BLI_assert(BLI_thread_is_main()); + BLI_assert(GPU_framebuffer_active_get() == NULL); + + if (g_drawable) { + wm_surface_clear_drawable(); + wm_surface_set_drawable(g_drawable, true); + } +} + +void wm_surface_add(wmSurface *surface) +{ + BLI_addtail(&global_surface_list, surface); +} + +void wm_surface_remove(wmSurface *surface) +{ + BLI_remlink(&global_surface_list, surface); + surface->free_data(surface); + MEM_freeN(surface); +} + +void wm_surfaces_free(void) +{ + for (wmSurface *surf = global_surface_list.first, *surf_next; surf; surf = surf_next) { + surf_next = surf->next; + wm_surface_remove(surf); + } + + BLI_assert(BLI_listbase_is_empty(&global_surface_list)); +} -- cgit v1.2.3