Adds support for using shared textures that were made with the
D3D11_RESOURCE_MISC_SHARED_NTHANDLE flag.
This increases the minimum required Windows version to Windows 8 or the
Platform Update for Windows 7. As official support is only for Win 8+
this does not change official support.
Windows 11 support for DISCARD swap effect seems to be buggy and slow.
Use FLIP_DISCARD instead. Staying with DISCARD on Windows 10 because of
reports of flickering that hopefully won't happen on Windows 11.
We're also not using ALLOW_TEARING because it seems to break after an
OBS cycle of minimize/restore on both Windows 10 and 11. The swap chain
displays a stale image. Not sure if ALLOW_TEARING would be beneficial
even if it was working.
On systems that have both Intel iGPU and Intel dGPU at the same time,
default/prioritize running OBS the iGPU instead to improve performance.
The user can still choose the dGPU if they change the adapter index, but
the adapter index will now be the second value instead of the first
value. (-Jim)
GS_RGBA, GS_BGRX, and GS_BGRA now use TYPELESS DXGI formats, so we can
alias them between UNORM and UNORM_SRGB as necessary. GS_RGBA_UNORM,
GS_BGRX_UNORM, and GS_BGRA_UNORM have been added to support straight
UNORM types, which Windows requires for sharing textures from D3D9 and
OpenGL. The D3D path aliases via views, and GL aliases via
GL_EXT_texture_sRGB_decode/GL_FRAMEBUFFER_SRGB.
A significant amount of code has changed in the D3D/GL backends, but the
concepts are simple. On the D3D side, we need separate SRVs and RTVs to
support nonlinear/linear reads and writes. On the GL side, we need to
set the proper GL parameters to emulate the same.
Add gs_enable_framebuffer_srgb/gs_framebuffer_srgb_enabled to set/get
the framebuffer as SRGB or not.
Add gs_linear_srgb_active/gs_set_linear_srgb to instruct sources that
they should render as SRGB. Legacy sources can ignore this setting
without regression.
Update obs_source_draw to use linear SRGB as needed.
Update render_filter_tex to use linear SRGB as needed.
Add gs_effect_set_texture_srgb next to gs_effect_set_texture to set
texture with SRGB view instead.
Add SRGB helpers for vec4 struct.
Create GDI-compatible textures without SRGB support. Doesn't seem to
work with SRGB formats.
Complex external systems using the D3D11 device may need to perform
their own device loss handling, the upcoming Windows Graphics Capture
support for example.
This change only wraps the functionality. I have rough code to exercise
the the query functionality, but that part is not really clean enough to
submit.
Code submissions have continually suffered from formatting
inconsistencies that constantly have to be addressed. Using
clang-format simplifies this by making code formatting more consistent,
and allows automation of the code formatting so that maintainers can
focus more on the code itself instead of code formatting.
There are cases where alpha is multiplied unnecessarily. This change
attempts to use premultiplied alpha blending for composition.
To keep this change simple, The filter chain will continue to use
straight alpha. Otherwise, every source would need to modified to output
premultiplied, and every filter modified for premultiplied input.
"DrawAlphaDivide" shader techniques have been added to convert from
premultiplied alpha to straight alpha for final output. "DrawMatrix"
techniques ignore alpha, so they do not appear to need changing.
One remaining issue is that scale effects are set up here to use the
same shader logic for both scale filters (straight alpha - incorrectly),
and output composition (premultiplied alpha - correctly). A fix could be
made to add additional shaders for straight alpha, but the "real" fix
may be to eliminate the straight alpha path at some point.
For graphics, SrcBlendAlpha and DestBlendAlpha were both ONE, and could
combine together to form alpha values greater than one. This is not as
noticeable of a problem for UNORM targets because the channels are
clamped, but it will likely become a problem in more situations if FLOAT
targets are used.
This change switches DestBlendAlpha to INVSRCALPHA. The blending
behavior of stacked transparents is preserved without overflowing the
alpha channel.
obs-transitions: Use premultiplied alpha blend, and simplify shaders
because both inputs and outputs use premultiplied alpha now.
Fixes https://obsproject.com/mantis/view.php?id=1108
This reverts commit d91bd327d7a8bb4597562fc26da4edb7b56874ff, which
broke alpha with sources, scenes, and filter, causing them all to become
opaque unintentionally.
Currently SrcBlendAlpha and DestBlendAlpha are both ONE, and can
combine together to form two. This is not a noticeable problem for
UNORM targets because the channels are clamped, but it will likely
become a problem if FLOAT targets are more widely used.
This change switches DestBlendAlpha to INVSRCALPHA, and starts
backgrounds as opaque black instead of transparent black. The blending
behavior of stacked transparents is preserved without overflowing the
alpha channel.
Performs a test on a texture to determine if NV12 textures are
functioning correctly. Older NVIDIA drivers appear to have a bug where
they will output their UV channel data on to the Y channel when copying
from the GPU. This test on startup determines whether that bug is
occurring, and if so, disables NV12 texture support.
When NV12 textures were added, driver crashes and their rebuild process
was not taken in to consideration. This fixes that by adding explicit
NV12 rebuild functions.
This commit fixes a bug that occurs on Windows 8+ when two or more
"Display Capture" sources are active that are configured to capture the
same monitor. Only one display capture would show, while all subsequent
display captures would display nothing.
Closesjp9000/obs-studio#1142
Fixes a bug where loading vertex shaders could cause error messages
about mismatching vertex buffer data to appear because the vertex shader
would try to reload the previously used vertex buffer.
When rebuilding the graphics subsystem, it's possible a shared texture
may no longer be available. In this case, just soft fail and allow the
texture to be rebuilt rather than crash the entire program over it.
Due to an NVIDIA driver bug with the Windows 10 Anniversary Update,
there are an increasingly large number of reports of "Device Removed"
errors and TDRs. When this happens, OBS stops outputting all data
because all graphics functions are failing, and it appears to just
"freeze up" for users.
To temporarily alleviate this issue while waiting for it to be fixed,
the D3D subsystem can be rebuilt when that happens, all assets can be
reloaded to ensure that it can continue functioning (with a minor hiccup
in playback).
To allow rebuilding the entire D3D subsystem, all objects that contain
D3D references must be part of a linked list (with a few exceptions) so
we can quickly traverse them all whenever needed, and all data for those
resources (static resources primarily, such as shaders, textures, index
buffers, vertex buffers) must be stored in RAM so they can be recreated
whenever needed.
Then if D3D reports a "device removed" or "device reset" error, all D3D
references must first be fully released with no stray references; the
linked list must be fully traversed until all references are released.
Then, the linked list must once again be traversed again, and all those
D3D objects must be recreated with the same data and descriptors (which
are now saved in each object). Finally, all states need to be reset.
After that's complete, the device is able to continue functioning almost
as it was before, although the output to recording/stream may get a few
green frames due to texture data being reset.
This will temporarily alleviate the "Device Removed" issue while waiting
for a fix from NVIDIA.
Instead of letting vertex buffer data be freed immediately, store it so
it can be used for rebuilding later. Also, separate the buffer building
to a function.
Unloads all device data and clears all device references. Probably not
necessary, but it's unknown how D3D11 handles this internally so
probably best to be safe.
