rhi: Improve srb layout serialization helpers

Be idiomatic and return the output iterator one past the last element.
Otherwise passing in a plain pointer (as exercised by the autotest now)
fails to function because we write over the same 4 elements again and
again for each binding.

Pick-to: 6.2
Change-Id: If74463fa5140ffa2b1d5be97b71868848ad46614
Reviewed-by: Andy Nichols <andy.nichols@qt.io>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/gui/rhi/qrhi.cpp b/src/gui/rhi/qrhi.cpp
index acea9a780a..f4855cd046 100644
--- a/src/gui/rhi/qrhi.cpp
+++ b/src/gui/rhi/qrhi.cpp
@@ -3052,7 +3052,7 @@ void QRhiImplementation::updateLayoutDesc(QRhiShaderResourceBindings *srb)
         const QRhiShaderResourceBinding::Data *d = b.data();
         srb->m_layoutDescHash ^= uint(d->binding) ^ uint(d->stage) ^ uint(d->type)
             ^ uint(d->type == QRhiShaderResourceBinding::SampledTexture ? d->u.stex.count : 1);
-        d->serialize(layoutDescAppender);
+        layoutDescAppender = d->serialize(layoutDescAppender);
     }
 }