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[video_core] Fix a bug in buffer cache that caused flickering in some games when using fast buffering (#2584)

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This fixes a bug in the buffer cache that caused flickering in some games when using fast buffering. This fixes Kirby Star Allies, Yoshi's Crafted World, and possibly many others.

Reviewed-on: eden-emu/eden#2584
Reviewed-by: Lizzie <lizzie@eden-emu.dev>
Co-authored-by: MaranBr <maranbr@outlook.com>
Co-committed-by: MaranBr <maranbr@outlook.com>
This commit is contained in:
MaranBr 2025-09-26 05:13:08 +02:00 • committed by crueter
parent 86ddb51a87
commit 19eb8272b1
Signed by untrusted user: crueter
GPG key ID: 425ACD2D4830EBC6
1 changed files with 5 additions and 6 deletions
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11
src/video_core/buffer_cache/buffer_cache.h
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@ -792,6 +792,11 @@ void BufferCache<P>::BindHostGraphicsUniformBuffer(size_t stage, u32 index, u32
const u32 size = (std::min)(binding.size, (*channel_state->uniform_buffer_sizes)[stage][index]);
Buffer& buffer = slot_buffers[binding.buffer_id];
TouchBuffer(buffer, binding.buffer_id);
const bool sync_buffer = SynchronizeBuffer(buffer, device_addr, size);
if (sync_buffer) {
++channel_state->uniform_cache_hits[0];
}
++channel_state->uniform_cache_shots[0];
const bool use_fast_buffer = binding.buffer_id != NULL_BUFFER_ID &&
size <= channel_state->uniform_buffer_skip_cache_size &&
!memory_tracker.IsRegionGpuModified(device_addr, size);
@ -822,12 +827,6 @@ void BufferCache<P>::BindHostGraphicsUniformBuffer(size_t stage, u32 index, u32
device_memory.ReadBlockUnsafe(device_addr, span.data(), size);
return;
}
// Classic cached path
const bool sync_cached = SynchronizeBuffer(buffer, device_addr, size);
if (sync_cached) {
++channel_state->uniform_cache_hits[0];
}
++channel_state->uniform_cache_shots[0];
// Skip binding if it's not needed and if the bound buffer is not the fast version
// This exists to avoid instances where the fast buffer is bound and a GPU write happens