- the clear color was broken since we switched dot EVSM
- use the scissor instead of the viewport, it makes it easier to compute
the uv-scale.
- the min/max lod level wasn't reset properly
- also clamp the minimum shadowmap size to 8, and document it.
We make better use of the framegraph, by using a pass per shadowmap,
instead of generating all shadowmaps in a single framegraph pass.
This allows us to use less temporary memory when blurring, but also
simplifies the code.
This is still somewhat work-in-progress, but good enough to be useful.
Some caveats:
- large blurs don't work well with cascades
- the implementation uses more memory than it could
This allows clients to obtain the extras strings for the asset and
for individual nodes. Note that extras for buffer views, accessors, etc
are not supported, although C++ clients can access the raw cgltf data
directly if they need to.
Filament uses a handful of known UBO, the code for creating their
interface block is not needed in filament (via filabridge), so
reorganize things so that we can move that code to filamat.
On the other hand, filament needs the C structure corresponding to
the UBO, to find the fields offset and ubo size and name.
We now have a UibStructs.h in filabridge which only defines C struct
with a static name for the interface block's.
This should slightly reduce the size of filament proper.
We also now have a new helper TypedUniformBuffer<> which simply holds
one of these structs (or an array), and allows to set the fields
directly and more naturally from C++. std140 alignment is now left to
the caller, when going through that class.
- use EVSM (exponential VSM), helps a lot with light bleeding
- don't apply shadow biases with VSM
- improve VSM user settings: added more controls, expose to java
- minor code cleanups:
- rename some structures
- remove unused parameters
- remove unused uniforms
VSM requires shadow receivers to be in the shadowmap, instead of
handling this in the shadow mapping code, we're handling it in
FScene::prepare(), which guarantees it'll ripple everywhere it needs to.
When creating a texture with a swizzle, the swizzle should be applied to
the image view only when sampling from that texture. When a swizzled
texture is used as a render target attachment, the image view should not
have any swizzle applied.
- OpenGL ES on Android
- Metal on MacOS/iOS
- Vulkan everywhere else (Linux/Windows)
The main change here is that OpenGL is no longer the default on
desktop.
Most of our samples have a `-a` option that can be use to specify the
desired backend.
1) Add a missing destroyTexture to the test, which I believe fixed
the Metal assert that I was seeing, as well as some Vulkan validation
warnings.
2) Add a flushAndWait() utility to BackendTest, which is useful for
diagnostics.
3) Fix a layout validation issue in VulkanSwapChain for empty render
passes.
This reworks how we compute the bloom buffer size. The main changes are:
- The BloomOptions.resolution is changed to height instead of minor axis.
This keeps a consistant look of the bloom regardless of the viewport.
- The anamorphism setting now dilates the bloom rather than to compress
it (in the other direction), which maintains the same amount of bloom.
However, the resolution decreases meaning that the user might need to
adjust resolution and/or levels.
- limit the resolution do 2048 which is gles minspec.
We were disabling the color pass render target clear when a skybox
was present. This optimization doesn't work when the viewport is not
full. Currently there is no way to know that, so we disable this
optimization for now. Performance loss is not expected to be significant
if present at all.
We were automatically clearing the color pass render target when
the view was translucent -- the idea was that when it gets blended at
the end it wouldn't override the content of the render target.
Unfortunately, this doesn't work when the rendertarget is imported,
because in that case, it's not actually blended, we're just rendering
into it directly. The clear would then erase the previous content.
This is fixed by moving the clearing decision in the execute closure and
piggy-backing on the computed discard flag. Discard means clear.
The discard flag will be set for newly created buffers and not for an
imported target that needs to keep its content.
An imported target shouldn't specify the discardStart flags, those
are calculated from the graph. However, it needs to specify "keep" flags,
to take into account constaints that the graph cannot see (due to the fact
that it's imported into the graph). i.e. the imported target may have
content that needs to be preserved.
An imported target can specify a clear color and clear flags that will
override the flags from the logical Descriptor -- this is a way to
delay the swapchain clear to when we're actually rendering into it
(which usually happens in the very last pass).
When the source of a blit refers to an imported render target,
we can't create a HwRenderTarget from it because the resource
is not a real texture and doesn't have a HwTexture.
However, it can be converted back to the HwRenderTarget it
represents, using the FrameGraph's declareRenderPass API.
It's a slightly strange usage of this API, but not technically
wrong.
This is the main fix for bug #4085
Philip Rideout
Mathias Agopian
Ben Doherty
Romain Guy