- Tracks which kind of raster was done (Z-ordered vs linear) throughout the application.
- This allows to identify if data is in the expected format or not.
- Those strange offsets noted in some games seem to match to subpixel addressing.
For example, when scaling down by a factor of 4, a pixel offset of 2 will end up inside pixel 0 of the output
- In blit engine logic there is a tendancy to over-allocate so as to avoid having to sticth together textures later
- Sometimes this can lead to out of bounds access and crash applications, so memory must be validated
- Detect writes to the display output memory and handle it specially.
It already defines a known 2D region.
- Try and detect situations where raw transfers would be of benefit.
- It is possible to have a RTV<->DSV transfer with compatible-sized formats.
Mark the depth size as typeless in such a situation to avoid crossing the aspect barrier with the API.
- Allows sections reclaimed by the surface store due to overlap/inheritance to be identified and removed.
- Additionally, potentially lowers the number of flushes required per block with multiple overlaps improving efficiency and theoretically performance.
- Reject writes to RTT if the source data is of unknown origin.
non-RTT data and only 1 line in length is suspicious and often GPU data like programs or other rendering inputs.
- Attempt to identify blit operations that will be flushed immediately
after and just do them on CPU instead if the transformation is trivial.
- If only a single blit section is contributing to an atlas merge op, the
threshold should be 100%. The only acceptable result here is a
truncation.
- Raise passing 'score' from 50% to 90% to filter out very incomplete
merge operations.
- Catch unfit sections passing the match test; possible for blit_dst
data but will likely be always harmless. Disabled in release builds by default.
subresource_layout::dim_in_texel
- These two are not always linked when working with compressed textures.
The actual texels extend past the actual size of the image if the size
is not aligned. e.g if height is 1, the real height is 4, but its not
possible to determine this from the aligned size. It could be 1, 2, 3 or
4 for example.
- Fixes image out-of-bounds writes when uploading from CPU
- If either source data or dest is a render target, do image operations on the GPU same as before
- If swizzle is desired, use CPU fallback
- If no scaling and no format conversion is required, use CPU fallback
- If scaling is desired and the transfer target is in local memory, use the GPU
- When doing trivial copies, use the routine in rsx_methods instead of
duplicating code. Also has the benefit of better range checking.
- When commiting a block as fbo, keep blit_dst data as well.
- Avoids removing (and losing data from) blit targets that just happen to share a page with a framebuffer.
- Uncacheable resources can be reused as soon as they're made visible to the draw call.
- Since they're likely to be reused every draw call until the shader changes, it is important to reuse as much as possible
