Merge pull request #1241 from Unity-Technologies/fix/BufferPyramid2

Fixed PyramidBuffer out of range copy

ScriptableRenderPipeline/HDRenderPipeline/HDRP/RenderPipelineResources/BufferPyramidProcessor.cs

                     1
                 );
 
-                var dstMipWidthToCopy = Mathf.Min(dest.rt.width, dstWorkMip.width);
-                var dstMipHeightToCopy = Mathf.Min(dest.rt.height, dstWorkMip.height);
+                var dstMipWidthToCopy = Mathf.Min(targetTexture.rt.width >> (i + 1), dstWorkMip.width);
+                var dstMipHeightToCopy = Mathf.Min(targetTexture.rt.height >> (i + 1), dstWorkMip.height);
 
                 // If we could bind texture mips as UAV we could avoid this copy...(which moreover copies more than the needed viewport if not fullscreen)
                 cmd.CopyTexture(mips[i], 0, 0, 0, 0, dstMipWidthToCopy, dstMipHeightToCopy, targetTexture, 0, i + 1, 0, 0);
                 var dest = mips[i];
 
                 var srcMip = new RectInt(0, 0, srcRect.width >> i, srcRect.height >> i);
-                //var dstMip = new RectInt(0, 0, srcMip.width >> 1, srcMip.height >> 1);
                 var srcWorkMip = new RectInt(
                     0,
                     0,
                     1
                 );
 
-                var dstMipWidthToCopy = Mathf.Min(dest.width, dstWorkMip.width);
-                var dstMipHeightToCopy = Mathf.Min(dest.height, dstWorkMip.height);
+                var dstMipWidthToCopy = Mathf.Min(targetTexture.width >> (i + 1), dstWorkMip.width);
+                var dstMipHeightToCopy = Mathf.Min(targetTexture.height >> (i + 1), dstWorkMip.height);
 
                 // If we could bind texture mips as UAV we could avoid this copy...(which moreover copies more than the needed viewport if not fullscreen)
                 cmd.CopyTexture(