From: Mikko Rasa <tdb@tdb.fi>
Date: Tue, 25 Jan 2022 18:14:17 +0000 (+0200)
Subject: Align staging memory with an alignment suitable for image transfers
X-Git-Url: http://git.tdb.fi/?a=commitdiff_plain;h=e9d24b3844110f8a545083bb0acbc504737aca88;p=libs%2Fgl.git

Align staging memory with an alignment suitable for image transfers

The source data needs to be aligned at a multiple of the texel size.  48
bytes is divisible by almost all possible pixel sizes.
---

diff --git a/source/backends/vulkan/transferqueue.cpp b/source/backends/vulkan/transferqueue.cpp
index 4ad50d86..f6f3c6f5 100644
--- a/source/backends/vulkan/transferqueue.cpp
+++ b/source/backends/vulkan/transferqueue.cpp
@@ -27,7 +27,8 @@ void TransferQueue::allocate_staging(PendingTransfer &transfer, size_t size)
 	transfer.size = size;
 	transfer.staging_address = static_cast<char *>(i->mapped_address)+transfer.offset;
 
-	i->used += size;
+	i->used += size+47;
+	i->used -= i->used%48;
 	++i->async_count;
 }