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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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12
idd/LGIdd/capture/CFrameBufferResource.h
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@@ -37,13 +37,6 @@ using namespace Microsoft::WRL;
class CFrameBufferResource
{
private:
enum ResourceType
{
RESOURCE_NONE,
RESOURCE_BUFFER,
RESOURCE_TEXTURE,
};
unsigned m_frameIndex = 0;
uint8_t * m_base = nullptr;
size_t m_size = 0;
@@ -62,16 +55,13 @@ class CFrameBufferResource
unsigned m_copyPitch = 0;
unsigned m_copyBytesPerPixel = 0;
unsigned m_candidateIndex = 0;
ResourceType m_type = RESOURCE_NONE;
D3D12_RESOURCE_DESC m_desc = {};
std::atomic<bool> m_completionHandled = false;
ComPtr<ID3D12Resource> m_res;
void * m_map = nullptr;
public:
bool Init(CD3D12Device * dx12, unsigned frameIndex, uint8_t * base,
uint64_t heapOffset, size_t size, size_t maxFrameSize,
const D3D12_RESOURCE_DESC * textureDesc = nullptr);
uint64_t heapOffset, size_t size, size_t maxFrameSize);
void Reset();
unsigned GetFrameIndex() { return m_frameIndex; }