Implement IsBlockContinous

This detects when a GPU Memory Block is not continous within host cpu
memory.

1 files changed, 8 insertions, 0 deletions

diff --git a/src/video_core/memory_manager.cpp b/src/video_core/memory_manager.cpp
index 18a8d2684..095a7e5a4 100644
--- a/src/video_core/memory_manager.cpp
+++ b/src/video_core/memory_manager.cpp
@@ -199,6 +199,14 @@ const u8* MemoryManager::GetPointer(GPUVAddr addr) const {
     return {};
 }
 
+bool MemoryManager::IsBlockContinous(const GPUVAddr start, const std::size_t size) {
+    const GPUVAddr end = start + size;
+    const auto host_ptr_start = reinterpret_cast<std::uintptr_t>(GetPointer(start));
+    const auto host_ptr_end = reinterpret_cast<std::uintptr_t>(GetPointer(end));
+    const std::size_t range = static_cast<std::size_t>(host_ptr_end - host_ptr_start);
+    return range == size;
+}
+
 void MemoryManager::ReadBlock(GPUVAddr src_addr, void* dest_buffer, const std::size_t size) const {
     std::size_t remaining_size{size};
     std::size_t page_index{src_addr >> page_bits};