Co-authored-by: crueter <crueter@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/88
This implements the use of VK_FILTER_CUBIC_EXT as a replacement for the software-based bicubic window adapting filter, used primarily for texture sampling in upscaled or downscaled surfaces such as UI, transparency effects, and screen-space elements in Unreal Engine 4 titles.
The Vulkan cubic filter is now conditionally enabled if the following are satisfied:
The device supports VK_EXT_filter_cubic
The format used supports VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_CUBIC_BIT_EXT
This change improves visual quality while reducing GPU workload by offloading cubic filtering to the driver instead of running custom sampling code in shaders. On supported hardware (e.g. desktop GPUs or high-end Adreno/AMD devices), it results in smoother transitions, improved transparency sampling, and better fidelity with lower shader complexity.
Fallback to the original software bicubic logic remains in place for devices lacking the extension or format capability.
Tested on several UE4 titles and confirmed to preserve or enhance visual output, especially in alpha-blended and UI-heavy scenes.
Co-authored-by: lizzie <lizzie@eden-emu.dev>
Co-committed-by: lizzie <lizzie@eden-emu.dev>
A shim that translates between the IQtiMapper(2,3,4) API used by newer Adreno graphics drivers and gralloc1, which is the only available gralloc API on sdm845.
Method
Exposes the same ABI as the newer mapper blobs and stubs enough functions to force the HAL to fallback to the 2.0 mapper/mapperextension API which is then shimmed with a passthrough to gralloc1. The blobs can then be patched to load the stub libs instead, see the blob-patcher script.
The code is fairly ugly but functional enough for the purpose, some functions are missing and will need to be implemented in the case that the driver starts using them.
Building
Chuck into a lineage tree, then:
make vendor.qti.hardware.display.mappershim
make vendor.qti.hardware.display.mapperextensionsshim
make android.hardware.graphics.mappershim
lizzie
b66adfe04c