Also optimize all tonemappers to perform less calculations per-pixel.
Note: unlike `white`, `agx_white` is limited to a minimum of `2.0` and defaults to `16.29`. When using a RGB10A2 render buffer, `agx_white` will be ignored and a value of `2.0` will be used instead to ensure good behavior on the Mobile renderer.
This avoids a shader compile error when using SSS and PREMUL_ALPHA_FACTOR in the same shader.
This doesn't change any functionaility, since in practive, the split-specular shader variant is only ever used for opaque objects while using premul alpha makes the object non-opaque
- Add support for vertex bindings and UMA vertex buffers in D3D12.
- Simplify 2D instance params and move more into per-batch data to save
bandwidth
Co-authored-by: Skyth <19259897+blueskythlikesclouds@users.noreply.github.com>
Co-authored-by: Clay John <claynjohn@gmail.com>
Co-authored-by: A Thousand Ships <96648715+athousandships@users.noreply.github.com>
Mobile devices are typically bandwidth bound which means we need to do as few texture samples as possible.
They typically use TBDR GPUs which means that all rendering takes place on special optimized tiles. As a side effect, reading back memory from tile to VRAM is really slow, especially on Mali devices.
This commit uses a technique where you do a small blur while downsampling, and then another small blur while upsampling to get really high quality glow. While this doesn't reduce the renderpass count very much, it does reduce the texture read bandwidth by almost 10 times. Overall glow was more texture-read bound than memory write, bound, so this was a huge win.
A side effect of this new technique is that we can gather the glow as we upsample instead of gathering the glow in the final tonemap pass. Doing so allows us to significantly reduce the cost of the tonemap pass as well.
This can result in low fog densities being a bit brighter, which may need slight adjustment in your scenes.
In exchange, volumetrics now blend smoothly together with the scene and regular fog.
Fixes#101514
This work is a heavily refactored and rewritten from TheForge's initial
code.
TheForge's original code had too many race conditions and was
fundamentally flawed as it was too easy to incur into those data races
by accident.
However they identified the proper places that needed changes, and the
idea was sound. I used their work as a blueprint to design this work.
This PR implements:
- Introduction of UMA buffers used by a few buffers
(most notably the ones filled by _fill_instance_data).
Ironically this change seems to positively affect PC more than it does
on Mobile.
Updates D3D12 Memory Allocator to get GPU_UPLOAD heap support.
Metal implementation by Stuart Carnie.
Co-authored-by: Stuart Carnie <stuart.carnie@gmail.com>
Co-authored-by: TheForge team
Thaddeus Crews
Kaleb Reid
Allen Pestaluky
Skyth
Thomas ten Cate
Dario
clayjohn
Bastiaan Olij
Stuart Carnie
Skorpnok
blaqjack
David Snopek
Rudolph Bester
Colby Klein