renderer_vulkan: Import host memory for screenshots (#7132)

src/common/memory_detect.cpp

@@ -8,12 +8,11 @@
 #include <sysinfoapi.h>
 #else
 #include <sys/types.h>
+#include <unistd.h>
 #if defined(__APPLE__) || defined(__FreeBSD__)
 #include <sys/sysctl.h>
 #elif defined(__linux__)
 #include <sys/sysinfo.h>
-#else
-#include <unistd.h>
 #endif
 #endif
 
@@ -64,4 +63,14 @@ const MemoryInfo GetMemInfo() {
     return mem_info;
 }
 
+u64 GetPageSize() {
+#ifdef _WIN32
+    SYSTEM_INFO info;
+    ::GetSystemInfo(&info);
+    return static_cast<u64>(info.dwPageSize);
+#else
+    return static_cast<u64>(sysconf(_SC_PAGESIZE));
+#endif
+}
+
 } // namespace Common

src/common/memory_detect.h

@@ -19,4 +19,10 @@ struct MemoryInfo {
  */
 [[nodiscard]] const MemoryInfo GetMemInfo();
 
+/**
+ * Gets the page size of the host system
+ * @return Page size in bytes of the host system
+ */
+u64 GetPageSize();
+
 } // namespace Common