buffer_cache: Add extra bytes to guest SSBOs

Bind extra bytes beyond the guest API's bound range.
This is due to some games like Astral Chain operating out of bounds.
Binding the whole map range would be technically correct, but games
have large maps that make this approach unaffordable for now.

1 files changed, 7 insertions, 1 deletions

diff --git a/src/video_core/buffer_cache/buffer_cache.h b/src/video_core/buffer_cache/buffer_cache.h
index a296036f4..2a6844ab1 100644
--- a/src/video_core/buffer_cache/buffer_cache.h
+++ b/src/video_core/buffer_cache/buffer_cache.h
@@ -1243,9 +1243,15 @@ typename BufferCache<P>::Binding BufferCache<P>::StorageBufferBinding(GPUVAddr s
     if (!cpu_addr || size == 0) {
         return NULL_BINDING;
     }
+    // HACK(Rodrigo): This is the number of bytes bound in host beyond the guest API's range.
+    // It exists due to some games like Astral Chain operate out of bounds.
+    // Binding the whole map range would be technically correct, but games have large maps that make
+    // this approach unaffordable for now.
+    static constexpr u32 arbitrary_extra_bytes = 0xc000;
+    const u32 bytes_to_map_end = static_cast<u32>(gpu_memory.BytesToMapEnd(gpu_addr));
     const Binding binding{
         .cpu_addr = *cpu_addr,
-        .size = size,
+        .size = std::min(size + arbitrary_extra_bytes, bytes_to_map_end),
         .buffer_id = BufferId{},
     };
     return binding;