glDispatchCompute requires Android API level 21, however bumping our
required minimum from 19 to 21 caused some clients' builds to fail.
Commenting-out that line for now to proceed with the 1.28.0 upgrade.
- remove mEngine from ShadowMap
- remove storage of ShadowMapInfo in ShadowMap
- ShadowMap::render should be on ShadowMapManager
- remove more attributes from ShadowMap
ShadowMap is now reduced to 32 bytes.
Spotlight shadow maps are now limited only by h/w limits (UBO size and
2d array maximum layers), which works out to about 146 shadows.
In practice we hardcode the limite to 64, but this can be changed at
compile time. A higher maximum increases memory usage.
There used to be a bitfield per renderable with a bit for each shadow
map indicating if the renderable was "visible" from this light. The
limit to 14 came from that bitfield. All shadow maps used to be culled
first, setting the bitfield appropriately.
Instead, we are now processing spotlight shadows one at a time,
performing culling as we go. For this reason we don't need a bit per
shadow map.
No need to generate a sentinel command in the main loop when a
command is canceled, this is now done automatically at a higher level.
The main benefit is that we can reject renderables that are not visible
a bit faster.
The VulkanProgram constructor was bailing out early and emitting a
warning because it saw that one of the stages wasn't fulfilled.
However it's okay for a pipeline to be missing a compute program.
Fixes regression that started with fabba73b1.
this case was causing uninitialized variables to be used creating a
false positive "shadows on" in the first cascade.
The main change here is to bail out as soon as we know there is no shadowing.
we attempted to select a shader which processed the required number of
component, but were always selecting the 4-components version.
this should improve blur performance for VSM.
