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Author SHA1 Message Date
riperiperi
4b60371e64
Return mapped buffer pointer directly for flush, WriteableRegion for textures (#2494)
* Return mapped buffer pointer directly for flush, WriteableRegion for textures

A few changes here to generally improve performance, even for platforms not using the persistent buffer flush.

- Texture and buffer flush now return a ReadOnlySpan<byte>. It's guaranteed that this span is pinned in memory, but it will be overwritten on the next flush from that thread, so it is expected that the data is used before calling again.
- As a result, persistent mappings no longer copy to a new array - rather the persistent map is returned directly as a Span<>. A similar host array is used for the glGet flushes instead of allocating new arrays each time.
- Texture flushes now do their layout conversion into a WriteableRegion when the texture is not MultiRange, which allows the flush to happen directly into guest memory rather than into a temporary span, then copied over. This avoids another copy when doing layout conversion.

Overall, this saves 1 data copy for buffer flush, 1 copy for linear textures with matching source/target stride, and 2 copies for block textures or linear textures with mismatching strides.

* Fix tests

* Fix array pointer for Mesa/Intel path

* Address some feedback

* Update method for getting array pointer.
2021-07-19 19:10:54 -03:00
gdkchan
df820a72de
Implement clear buffer (fast path) (#1902)
* Implement clear buffer (fast path)

* Remove blank line
2021-01-13 08:50:54 +11:00
gdkchan
812e32f775
Fix transform feedback errors caused by host pause/resume and multiple uses (#1634)
* Fix transform feedback errors caused by host pause/resume

* Fix TFB being used as something else issue with copies

* This is supposed to be StreamCopy
2020-10-25 17:23:42 -03:00
gdkchan
5011640b30
Spanify Graphics Abstraction Layer (#1226)
* Spanify Graphics Abstraction Layer

* Be explicit about BufferHandle size
2020-05-23 11:46:09 +02:00
gdkchan
b8e3909d80 Add a GetSpan method to the memory manager and use it on GPU (#877) 2020-01-13 10:27:50 +11:00
gdk
1876b346fe Initial work 2020-01-09 02:13:00 +01:00