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[idd] capture: preserve software copy row pitch

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Use an explicit placed buffer for software frame copies so the D3D copy
uses the same row pitch published through KVMFR.

GetCopyableFootprints describes buffer copies and cannot be used to infer
the physical layout of a placed row-major texture. This caused padded
resolutions to use the wrong row starts in every consumer.

Keep the copy direct to IVSHMEM without a staging or CPU copy.
This commit is contained in:
Geoffrey McRae
2026-08-07 21:10:37 +10:00
parent 1de52f6e8a
commit e470f9d8ae
8 changed files with 34 additions and 173 deletions
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5
idd/LGIdd/d3d/CD3D12Device.cpp
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@@ -120,9 +120,6 @@ CD3D12Device::InitResult CD3D12Device::Init(
D3D12_HEAP_DESC heapDesc = m_transportHeap->GetDesc();
alignSize = heapDesc.Alignment;
m_directTextureSupported =
(heapDesc.Flags & D3D12_HEAP_FLAG_SHARED_CROSS_ADAPTER) &&
!(heapDesc.Flags & D3D12_HEAP_FLAG_DENY_NON_RT_DS_TEXTURES);
// test that the heap is usable
if (!HeapTest())
@@ -136,8 +133,6 @@ CD3D12Device::InitResult CD3D12Device::Init(
}
DEBUG_INFO("Using transport memory as a D3D12 heap");
if (!m_directTextureSupported)
DEBUG_WARN("Transport memory does not support placed textures");
}
if (!m_copyQueue.Init(m_device.Get(), D3D12_COMMAND_LIST_TYPE_COPY,