This changes the default shader loading strategy, implemented in the
Metal driver, to compile the `MTLLibrary` on demand when the pipeline
is created, which reduces cold startup time on IPHONE target OSs.
Normally, the `MTLLibrary` is compiled from Metal source asynchronously
when Godot calls
`RenderingDeviceDriverMetal::shader_create_from_bytecode`; however, this
changes this behaviour on mobile platforms to do it on demand when the
pipeline is created, as noted in #96052, Godot will ask to create
many more shaders from bytecode than are initially required. Mobile
OSs like iOS are limited to compiling to shader libraries concurrently,
which results in a significant bottleneck.
This is not the default for macOS, as it can concurrently compile many
shaders at once, resulting in faster startup times for the Godot editor.
VMA handles memory allocation on certain devices better than our custom VK code, so we might as well use it
Co-authored-by: Matias N. Goldberg <dark_sylinc@yahoo.com.ar>
This avoids crashing on devices when a number of varyings greater than the device limit is used.
For now this accurately prints an error when compiling the shader, but the error text only pops up in the editor if the number of user varyings is above the limit.
PR #90993 needed to get rid of VMA_MEMORY_USAGE_AUTO_PREFER_HOST because
we no longer used vmaCreateBuffer so we could specify the allocation
callbacks.
This however resulted in the wrong memory pool being chosen, causing
signficant performance slowdown.
Indicate additional preferred flags to help VMA select the proper pool.
Fixes#101905
This is a followup to PR #101344 (commit
0e06eb80bc).
Some of them were not an issue because Godot was initializing all
members, but they were "fixed" just in case since it could become a
problem in the future.
Valgrind was specifically complaining about HashMapData &
GlobalPipelineData.
This change improves performance of the AgX tonemapper by allowing two matrix multiplications to be combined into one. This comes at the cost of loss of color information that could be correctly interpreted as positive RGB values in the Rec. 2020 color space. Additionally, an insignificant amount of error is intentionally introduced to the input color value to prevent the need for a second max function call before log2. The final negative color clipping has been removed to allow the tonemapper to return negative RGB values, similar to other tonemappers in Godot.
