NOTE: This also required some changes to Cycles code itself, who is now
directly including `BKE_image.hh` instead of declaring a few prototypes
of these functions in its `blender/utils.h` header (due to C++ functions
names mangling, this was not working anymore).
Pull Request: https://projects.blender.org/blender/blender/pulls/130174
Turns out the sampling module was not initialized when
computing lighting which resulted in undefined shadow location.
In some cases even producing NaN position which would make the
shadow disappear.
Basically, anything returned by `sampling_rng_nD_get` was returning
garbage, and on some occasion, it could be a negative number and
produce NaN if passed into `sample_disk` or any `sqrt`.
ASAN did not catch it because the uninitialized data load
was done on the GPU.
I ran the render tests and, minor difference aside, they all match.
#### Follow Up:
This raises the concern that we have no assertion for correctly
using some modules. At the very least, we should have some
mechanism to catch uninitialized buffer. Investigating this
was a pain au chocolat.
Pull Request: https://projects.blender.org/blender/blender/pulls/130150
The crash was caused by the texture wrapper being out of date.
This happened after workbench finished rendering AntiAliasing and
going into blit-result-only mode. Doing so was causing a use after
free caught by ASAN.
But this only partially fix the bug as workbench render then becomes
uninitialized (black most likely) after dragging the window to the
second monitor. This is because the TAA texture gets recreated since
the new viewport resolution doesn't match the old one. But this
recreation does not tag as a viewport update so the TAA stays in
blit-result-only mode.
Detecting the viewport resolution change at the engine init level
seems the safest option for now, and it fixes the remaining issue.
To be backported to 4.2.
Pull Request: https://projects.blender.org/blender/blender/pulls/130043
When the light volume probe cannot be allocated a pool of a different
size is used. A message is displayed to the user. This PR improves the
message by adding the previous size as well.
Ref #129889
Pull Request: https://projects.blender.org/blender/blender/pulls/129963
First this make the wire batch use the same set of drawing that the main
gpencil batch uses (as they share the same VBO data, they need to use
the same drawings).
Then we skip drawing the onion frames by nullifying the indices in the
index buffer. A better way would be to skip these strokes or drawing
but that can be done later and seems more bug prone.
Pull Request: https://projects.blender.org/blender/blender/pulls/129920
The issue was that the masks for the current frame would be
rendered for a different frame.
Unfortunately, we can't easily render masks for the onion
skinned frames correctly at the moment.
The fix makes it so that we render the mask only for the current frame.
Pull Request: https://projects.blender.org/blender/blender/pulls/129878
When using a lot of instances the requested and needed attributes
are merged. This process uses a lock even when no work needs to be
done.
By early exiting the merging process when no work needs to be done
the performance of navigating 60k cubes went from 17.5 fps to 18.3 fps.
Detected when researching #126391.
Pull Request: https://projects.blender.org/blender/blender/pulls/129791
This allows to use `assert()` directly inside shader source.
The current implementation is just replacing it with a printf
that gives some information about the location of the assert.
It is not that much more helpful than a printf with a condition.
What is useful is that they are disabled by default. So they
can be sprinkle around and only turned on during debugging.
Adding shader name inside the assert report is not trivial and
could be added later (the shader name is only known at compile
time which is too late for string parsing).
Adding which drawcall produced the assert isn't trivial either.
It would require flushing the printf buffer for each drawcall
which might force synchronization and remove bugs.
Pull Request: https://projects.blender.org/blender/blender/pulls/129728
This would happen if the viewport with large enough
and a tile resolution of 1:1 was choosen.
This changes the fallback behavior from simply clamping
the resolution (which did break a lot of math downstream),
to simply finding the next largest tile size that fits
the hardware requirements.
