The chain copy that clears the emulated textureCompressionBC only knew a
handful of structure sizes, so a valid chain such as
VkPhysicalDeviceTimelineSemaphoreFeatures -> VkPhysicalDeviceFeatures2 was
passed on unchanged and the compat layer refused the bit. Size every
structure that may extend VkDeviceCreateInfo from a table generated from the
Vulkan registry (gen_device_chain.py, Vulkan-Headers 1.3.275, the headers
the build compiles with), and copy onto the heap instead of a fixed buffer.
Only a structure newer than those headers still passes the chain unchanged.
Add a regression test that runs the layer between a simulated loader and a
mock driver: the timeline-semaphore chain, pEnabledFeatures, an unknown
structure, the caller's structures left untouched, per-device YCbCr sampler
tracking with handle reuse, and the KHR calibrated-timestamp forwarding. CI
installs libvulkan-dev for it.
- Clear textureCompressionBC in a copy of the device-create chain (every
structure up to the VkPhysicalDeviceFeatures2 that enables it) instead of
writing the caller's structure; a chain led by a structure of unknown size
is passed on unchanged.
- Track YCbCr samplers per device in a growable list, drop them on
vkDestroySampler and device teardown, and fail sampler creation rather
than leave one untracked when the list cannot grow.
- Fail descriptor set layout creation with VK_ERROR_OUT_OF_HOST_MEMORY when
a replacement sampler array cannot be allocated, instead of passing the
original YCbCr samplers to the driver.
Detect Samsung's Vulkan HAL (vulkan.samsung.so) and its sgpu render node
alongside PowerVR, and run Xclipse through the same libhybris bridge:
- VK_LAYER_DROIDDECK_xclipse (tools/linuxfs/xclipse-layer), built with the
glibc preloads and enabled only on Xclipse: sets bionic's environ for the
driver's shader compiler, avoids immutable YCbCr samplers in compute
layouts, forwards the KHR calibrated-timestamp entry points to the EXT
ones, and reports textureCompressionBC and BC4/BC5 filtering over the
compat layer's BC emulation.
- Upstream DXVK 2.6.2, pinned as a tar.gz component and selected on Xclipse:
the driver has 128 bytes of push constants, DXVK 3 needs 256.
- android_wlegl accepts a zero stride and passes it through unchanged:
Samsung's gralloc records none for GPU-only buffers.
Tested on a Galaxy A56 (Xclipse 540, driver 24.0.560): Steam Big Picture
and PICO PARK (D3D9).
Stefan Zijlstra