The current Vulkan resource management has some issues as context that
are not active can still use resources that are freed via another
context.
When this happens incorrect data can be read on the GPU and even crash
Blender. When trying to bind something that now contains other memory
pointers.
This change introduces that contexts are tracked via the device.
Context will be registered/unregistered with the device instance.
Unbinding of resources must pass the device and the device will check
all registered contexts. Binding of resources will happen via the active
context only.
On user perspective this now allowes:
- Opening/switching files
- Switching workspaces
- Switching render engines
Pull Request: https://projects.blender.org/blender/blender/pulls/108968
A lot of files were missing copyright field in the header and
the Blender Foundation contributed to them in a sense of bug
fixing and general maintenance.
This change makes it explicit that those files are at least
partially copyrighted by the Blender Foundation.
Note that this does not make it so the Blender Foundation is
the only holder of the copyright in those files, and developers
who do not have a signed contract with the foundation still
hold the copyright as well.
Another aspect of this change is using SPDX format for the
header. We already used it for the license specification,
and now we state it for the copyright as well, following the
FAQ:
https://reuse.software/faq/
Vulkan doesn't have a conversion from uint32_t/int32_t to float. It does
have conversions from 16/8 bits. Main reason is that Vulkan expects that
there is no benefit when converting 32 bits from one type to the other
and should be solved by passing the right data type.
In Blender however this isn't the case as there are benefits on other
GPU backends (OpenGL for example).
This PR adds helper function to check if conversion is needed and
perform any conversions in place. It also implements the function to
upload vertex buffers to the GPU.
NOTE: Test cases have been added to validate this, but they are not
able to run on the Vulkan backend just yet, because they require the
graphics pipeline to be available.
Pull Request: https://projects.blender.org/blender/blender/pulls/107733
