Fix same textures with unmapped start being considered different (#7141)

* Fix same textures with unmapped start being considered different

* Consolidate IsInvalid check

* InvalidAddress const

* Fix typo

Co-authored-by: riperiperi <rhy3756547@hotmail.com>

---------

Co-authored-by: riperiperi <rhy3756547@hotmail.com>

src/Ryujinx.Memory/Range/IMultiRangeItem.cs

@@ -4,6 +4,22 @@ namespace Ryujinx.Memory.Range
     {
         MultiRange Range { get; }
 
-        ulong BaseAddress => Range.GetSubRange(0).Address;
+        ulong BaseAddress
+        {
+            get
+            {
+                for (int index = 0; index < Range.Count; index++)
+                {
+                    MemoryRange subRange = Range.GetSubRange(index);
+
+                    if (!MemoryRange.IsInvalid(ref subRange))
+                    {
+                        return subRange.Address;
+                    }
+                }
+
+                return MemoryRange.InvalidAddress;
+            }
+        }
     }
 }

src/Ryujinx.Memory/Range/MemoryRange.cs

@@ -5,6 +5,11 @@ namespace Ryujinx.Memory.Range
     /// </summary>
     public readonly record struct MemoryRange
     {
+        /// <summary>
+        /// Special address value used to indicate than an address is invalid.
+        /// </summary>
+        internal const ulong InvalidAddress = ulong.MaxValue;
+
         /// <summary>
         /// An empty memory range, with a null address and zero size.
         /// </summary>
@@ -58,13 +63,24 @@ namespace Ryujinx.Memory.Range
             return thisAddress < otherEndAddress && otherAddress < thisEndAddress;
         }
 
+        /// <summary>
+        /// Checks if a given sub-range of memory is invalid.
+        /// Those are used to represent unmapped memory regions (holes in the region mapping).
+        /// </summary>
+        /// <param name="subRange">Memory range to check</param>
+        /// <returns>True if the memory range is considered invalid, false otherwise</returns>
+        internal static bool IsInvalid(ref MemoryRange subRange)
+        {
+            return subRange.Address == InvalidAddress;
+        }
+
         /// <summary>
         /// Returns a string summary of the memory range.
         /// </summary>
         /// <returns>A string summary of the memory range</returns>
         public override string ToString()
         {
-            if (Address == ulong.MaxValue)
+            if (Address == InvalidAddress)
             {
                 return $"[Unmapped 0x{Size:X}]";
             }

src/Ryujinx.Memory/Range/MultiRangeList.cs

@@ -30,7 +30,7 @@ namespace Ryujinx.Memory.Range
             {
                 var subrange = range.GetSubRange(i);
 
-                if (IsInvalid(ref subrange))
+                if (MemoryRange.IsInvalid(ref subrange))
                 {
                     continue;
                 }
@@ -56,7 +56,7 @@ namespace Ryujinx.Memory.Range
             {
                 var subrange = range.GetSubRange(i);
 
-                if (IsInvalid(ref subrange))
+                if (MemoryRange.IsInvalid(ref subrange))
                 {
                     continue;
                 }
@@ -99,7 +99,7 @@ namespace Ryujinx.Memory.Range
             {
                 var subrange = range.GetSubRange(i);
 
-                if (IsInvalid(ref subrange))
+                if (MemoryRange.IsInvalid(ref subrange))
                 {
                     continue;
                 }
@@ -142,17 +142,6 @@ namespace Ryujinx.Memory.Range
             return overlapCount;
         }
 
-        /// <summary>
-        /// Checks if a given sub-range of memory is invalid.
-        /// Those are used to represent unmapped memory regions (holes in the region mapping).
-        /// </summary>
-        /// <param name="subRange">Memory range to checl</param>
-        /// <returns>True if the memory range is considered invalid, false otherwise</returns>
-        private static bool IsInvalid(ref MemoryRange subRange)
-        {
-            return subRange.Address == ulong.MaxValue;
-        }
-
         /// <summary>
         /// Gets all items on the list starting at the specified memory address.
         /// </summary>