Improved GPU command lists decoding (#499)

* Better implementation of the DMA pusher, misc fixes

* Remove some debug code

* Correct RGBX8 format

* Add support for linked Texture Sampler Control

* Attempt to fix upside down screen issue

Ryujinx.Graphics/GpuResourceManager.cs

@@ -117,7 +117,7 @@ namespace Ryujinx.Graphics
             return false;
         }
 
-        private bool MemoryRegionModified(NvGpuVmm Vmm, long Position, long Size, NvGpuBufferType Type)
+        public bool MemoryRegionModified(NvGpuVmm Vmm, long Position, long Size, NvGpuBufferType Type)
         {
             HashSet<long> Uploaded = UploadedKeys[(int)Type];
 
@@ -136,5 +136,10 @@ namespace Ryujinx.Graphics
                 UploadedKeys[Index].Clear();
             }
         }
+
+        public void ClearPbCache(NvGpuBufferType Type)
+        {
+            UploadedKeys[(int)Type].Clear();
+        }
     }
 }