diff options
author | Julian Eisel <julian@blender.org> | 2020-03-17 22:20:55 +0300 |
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committer | Julian Eisel <julian@blender.org> | 2020-03-17 23:42:44 +0300 |
commit | dc2df8307f41888bab722f75fa9e73adecf86b72 (patch) | |
tree | f83c54f43e27a07e9cb9fed306d79b08864f29f2 /source/blender/gpu | |
parent | 406bfd43040a5526702b51f88f1491cb61aecedb (diff) |
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
Diffstat (limited to 'source/blender/gpu')
-rw-r--r-- | source/blender/gpu/GPU_viewport.h | 3 | ||||
-rw-r--r-- | source/blender/gpu/intern/gpu_viewport.c | 46 |
2 files changed, 41 insertions, 8 deletions
diff --git a/source/blender/gpu/GPU_viewport.h b/source/blender/gpu/GPU_viewport.h index 986d9720ab9..848da778d1c 100644 --- a/source/blender/gpu/GPU_viewport.h +++ b/source/blender/gpu/GPU_viewport.h @@ -104,6 +104,9 @@ GPUViewport *GPU_viewport_create(void); void GPU_viewport_bind(GPUViewport *viewport, const rcti *rect); void GPU_viewport_unbind(GPUViewport *viewport); void GPU_viewport_draw_to_screen(GPUViewport *viewport, const rcti *rect); +void GPU_viewport_draw_to_screen_ex(GPUViewport *viewport, + const rcti *rect, + bool display_colorspace); void GPU_viewport_free(GPUViewport *viewport); void GPU_viewport_colorspace_set(GPUViewport *viewport, diff --git a/source/blender/gpu/intern/gpu_viewport.c b/source/blender/gpu/intern/gpu_viewport.c index 8ccfa3d9898..e4fd5d3f122 100644 --- a/source/blender/gpu/intern/gpu_viewport.c +++ b/source/blender/gpu/intern/gpu_viewport.c @@ -532,7 +532,13 @@ static void gpu_viewport_draw_colormanaged(GPUViewport *viewport, } } -void GPU_viewport_draw_to_screen(GPUViewport *viewport, const rcti *rect) +/** + * Version of #GPU_viewport_draw_to_screen() that lets caller decide if display colorspace + * transform should be performed. + */ +void GPU_viewport_draw_to_screen_ex(GPUViewport *viewport, + const rcti *rect, + bool display_colorspace) { DefaultFramebufferList *dfbl = viewport->fbl; DefaultTextureList *dtxl = viewport->txl; @@ -545,18 +551,22 @@ void GPU_viewport_draw_to_screen(GPUViewport *viewport, const rcti *rect) const float w = (float)GPU_texture_width(color); const float h = (float)GPU_texture_height(color); - BLI_assert(w == BLI_rcti_size_x(rect) + 1); - BLI_assert(h == BLI_rcti_size_y(rect) + 1); + /* We allow rects with min/max swapped, but we also need coorectly assigned coordinates. */ + rcti sanitized_rect = *rect; + BLI_rcti_sanitize(&sanitized_rect); + + BLI_assert(w == BLI_rcti_size_x(&sanitized_rect) + 1); + BLI_assert(h == BLI_rcti_size_y(&sanitized_rect) + 1); /* wmOrtho for the screen has this same offset */ const float halfx = GLA_PIXEL_OFS / w; const float halfy = GLA_PIXEL_OFS / h; rctf pos_rect = { - .xmin = rect->xmin, - .ymin = rect->ymin, - .xmax = rect->xmin + w, - .ymax = rect->ymin + h, + .xmin = sanitized_rect.xmin, + .ymin = sanitized_rect.ymin, + .xmax = sanitized_rect.xmin + w, + .ymax = sanitized_rect.ymin + h, }; rctf uv_rect = { @@ -565,8 +575,28 @@ void GPU_viewport_draw_to_screen(GPUViewport *viewport, const rcti *rect) .xmax = halfx + 1.0f, .ymax = halfy + 1.0f, }; + /* Mirror the UV rect in case axis-swapped drawing is requested (by passing a rect with min and + * max values swapped). */ + if (BLI_rcti_size_x(rect) < 0) { + SWAP(float, uv_rect.xmin, uv_rect.xmax); + } + if (BLI_rcti_size_y(rect) < 0) { + SWAP(float, uv_rect.ymin, uv_rect.ymax); + } + + gpu_viewport_draw_colormanaged(viewport, &pos_rect, &uv_rect, display_colorspace); +} - gpu_viewport_draw_colormanaged(viewport, &pos_rect, &uv_rect, true); +/** + * Merge and draw the buffers of \a viewport into the currently active framebuffer, performing + * color transform to display space. + * + * \param rect: Coordinates to draw into. By swapping min and max values, drawing can be done with + * inversed axis coordinates (upside down or sideways). + */ +void GPU_viewport_draw_to_screen(GPUViewport *viewport, const rcti *rect) +{ + GPU_viewport_draw_to_screen_ex(viewport, rect, true); } /** |