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buffer_cache: Bring back CPU path (#3679)

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It was reported this resulted in a noticeable 10+ fps drop in Driveclub so bring it back just with check to avoid it if the source range is an image alias
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TheTurtle
2025-10-01 22:22:48 +03:00
committed by GitHub
parent 6fb64a8054
commit 0134b8c3a8
1 changed files with 10 additions and 0 deletions
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10
src/video_core/buffer_cache/buffer_cache.cpp
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@@ -365,6 +365,16 @@ void BufferCache::InlineData(VAddr address, const void* value, u32 num_bytes, bo
} }
void BufferCache::CopyBuffer(VAddr dst, VAddr src, u32 num_bytes, bool dst_gds, bool src_gds) { void BufferCache::CopyBuffer(VAddr dst, VAddr src, u32 num_bytes, bool dst_gds, bool src_gds) {
if (!dst_gds && !IsRegionGpuModified(dst, num_bytes)) {
if (!src_gds && !IsRegionGpuModified(src, num_bytes) &&
!texture_cache.FindImageFromRange(src, num_bytes)) {
// Both buffers were not transferred to GPU yet. Can safely copy in host memory.
memcpy(std::bit_cast<void*>(dst), std::bit_cast<void*>(src), num_bytes);
return;
}
// Without a readback there's nothing we can do with this
// Fallback to creating dst buffer on GPU to at least have this data there
}
texture_cache.InvalidateMemoryFromGPU(dst, num_bytes); texture_cache.InvalidateMemoryFromGPU(dst, num_bytes);
auto& src_buffer = [&] -> const Buffer& { auto& src_buffer = [&] -> const Buffer& {
if (src_gds) { if (src_gds) {