[idd] capture: execute texture frame graphs

idd/LGIdd/LGIdd.vcxproj

@@ -43,6 +43,7 @@
     <ClCompile Include="display\CMonitorContext.cpp" />
     <ClCompile Include="capture\CFrameBufferPool.cpp" />
     <ClCompile Include="capture\CFrameBufferResource.cpp" />
+    <ClCompile Include="capture\CFrameExec.cpp" />
     <ClCompile Include="capture\CFrameGraph.cpp" />
     <ClCompile Include="capture\CFrameTex.cpp" />
     <ClCompile Include="capture\CFrameProcessor.cpp" />
@@ -62,6 +63,7 @@
     <ClCompile Include="postprocess\effect\CColorTransformEffect.cpp" />
     <ClCompile Include="postprocess\effect\CComputeEffect.cpp" />
     <ClCompile Include="postprocess\effect\CDownsampleEffect.cpp" />
+    <ClCompile Include="postprocess\effect\CFormatEffect.cpp" />
     <ClCompile Include="postprocess\effect\CHDR16to10Effect.cpp" />
     <ClCompile Include="postprocess\effect\CRGB24Effect.cpp" />
     <ClCompile Include="transport\CControlHub.cpp" />
@@ -99,6 +101,7 @@
     <ClInclude Include="display\CMonitorContext.h" />
     <ClInclude Include="capture\CFrameBufferPool.h" />
     <ClInclude Include="capture\CFrameBufferResource.h" />
+    <ClInclude Include="capture\CFrameExec.h" />
     <ClInclude Include="capture\CFrameGraph.h" />
     <ClInclude Include="capture\CFrameTex.h" />
     <ClInclude Include="capture\CFrameProcessor.h" />
@@ -119,6 +122,7 @@
     <ClInclude Include="postprocess\effect\CColorTransformEffect.h" />
     <ClInclude Include="postprocess\effect\CComputeEffect.h" />
     <ClInclude Include="postprocess\effect\CDownsampleEffect.h" />
+    <ClInclude Include="postprocess\effect\CFormatEffect.h" />
     <ClInclude Include="postprocess\effect\CHDR16to10Effect.h" />
     <ClInclude Include="postprocess\effect\CRGB24Effect.h" />
     <ClInclude Include="transport\CControlHub.h" />

idd/LGIdd/LGIdd.vcxproj.filters

@@ -97,6 +97,9 @@
     <ClInclude Include="capture\CFrameBufferResource.h">
       <Filter>Capture</Filter>
     </ClInclude>
+    <ClInclude Include="capture\CFrameExec.h">
+      <Filter>Capture</Filter>
+    </ClInclude>
     <ClInclude Include="capture\CFrameGraph.h">
       <Filter>Capture</Filter>
     </ClInclude>
@@ -157,6 +160,9 @@
     <ClInclude Include="postprocess\effect\CDownsampleEffect.h">
       <Filter>Post-processing\Effects</Filter>
     </ClInclude>
+    <ClInclude Include="postprocess\effect\CFormatEffect.h">
+      <Filter>Post-processing\Effects</Filter>
+    </ClInclude>
     <ClInclude Include="postprocess\effect\CHDR16to10Effect.h">
       <Filter>Post-processing\Effects</Filter>
     </ClInclude>
@@ -294,6 +300,9 @@
     <ClCompile Include="capture\CFrameBufferResource.cpp">
       <Filter>Capture</Filter>
     </ClCompile>
+    <ClCompile Include="capture\CFrameExec.cpp">
+      <Filter>Capture</Filter>
+    </ClCompile>
     <ClCompile Include="capture\CFrameGraph.cpp">
       <Filter>Capture</Filter>
     </ClCompile>
@@ -351,6 +360,9 @@
     <ClCompile Include="postprocess\effect\CDownsampleEffect.cpp">
       <Filter>Post-processing\Effects</Filter>
     </ClCompile>
+    <ClCompile Include="postprocess\effect\CFormatEffect.cpp">
+      <Filter>Post-processing\Effects</Filter>
+    </ClCompile>
     <ClCompile Include="postprocess\effect\CHDR16to10Effect.cpp">
       <Filter>Post-processing\Effects</Filter>
     </ClCompile>

idd/LGIdd/capture/CFrameExec.cpp

@@ -0,0 +1,773 @@
+/**
+ * Looking Glass
+ * Copyright © 2017-2026 The Looking Glass Authors
+ * https://looking-glass.io
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc., 59
+ * Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "capture/CFrameExec.h"
+
+#include "d3d/CD3D11Device.h"
+#include "d3d/CD3D12Device.h"
+#include "d3d/CInteropPool.h"
+#include "d3d/CInteropResource.h"
+#include "postprocess/effect/CColorTransformEffect.h"
+#include "postprocess/effect/CDownsampleEffect.h"
+#include "postprocess/effect/CFormatEffect.h"
+#include "postprocess/effect/CHDR16to10Effect.h"
+#include "transport/CTexHub.h"
+
+#include <cstring>
+#include <new>
+#include <utility>
+
+namespace
+{
+  static const unsigned EXEC_LANES = 2;
+  static const unsigned EXEC_SLOTS = 4;
+
+  enum class ExecOp : uint8_t
+  {
+    COPY,
+    CAL,
+    LUT,
+    SCALE,
+    HDR10,
+    FORMAT,
+  };
+
+  D12FrameFormat MakeFormat(const FrameProfile& profile,
+    unsigned width, unsigned height,
+    const std::shared_ptr<const D12ColorTransform>& transform,
+    D3D12_RESOURCE_FLAGS flags = D3D12_RESOURCE_FLAG_NONE)
+  {
+    D12FrameFormat format = {};
+    D12::Set(format,
+      Frame::Store(profile, FrameStorage::D3D12_TEXTURE),
+      width, height, flags);
+    format.colorTransform = transform;
+    return format;
+  }
+
+  bool Copy(ID3D12GraphicsCommandList * list,
+    ID3D12Resource * src, ID3D12Resource * dst)
+  {
+    if (!list || !src || !dst || src == dst)
+      return false;
+
+    const D3D12_RESOURCE_DESC in  = src->GetDesc();
+    const D3D12_RESOURCE_DESC out = dst->GetDesc();
+    if (!D12::Same(in, out, D12::DescCmp::COPY))
+      return false;
+
+    // Leave the immutable input in COMMON. COPY_SOURCE is promoted
+    // implicitly, allowing the legacy and texture queues to read it without
+    // cross-queue state ownership. Only this private destination transitions.
+    D3D12_RESOURCE_BARRIER barrier = {};
+    barrier.Type = D3D12_RESOURCE_BARRIER_TYPE_TRANSITION;
+    barrier.Transition.pResource   = dst;
+    barrier.Transition.StateBefore = D3D12_RESOURCE_STATE_COMMON;
+    barrier.Transition.StateAfter  = D3D12_RESOURCE_STATE_COPY_DEST;
+    barrier.Transition.Subresource = D3D12_RESOURCE_BARRIER_ALL_SUBRESOURCES;
+    list->ResourceBarrier(1, &barrier);
+    list->CopyResource(dst, src);
+    std::swap(barrier.Transition.StateBefore,
+      barrier.Transition.StateAfter);
+    list->ResourceBarrier(1, &barrier);
+    return true;
+  }
+
+  CfgResult CfgFromTex(TexResult result)
+  {
+    switch (result)
+    {
+      case TexResult::OK:
+        return CfgResult::ACCEPTED;
+      case TexResult::BUSY:
+        return CfgResult::RETRY;
+      case TexResult::REJECTED:
+        return CfgResult::REJECTED;
+      case TexResult::FAILED:
+        return CfgResult::FAILED;
+    }
+    return CfgResult::FAILED;
+  }
+
+  bool Supports(ID3D12Device3 * device, ExecOp op,
+    DXGI_FORMAT src, DXGI_FORMAT dst)
+  {
+    if (op == ExecOp::COPY)
+      return true;
+    D3D12_FEATURE_DATA_FORMAT_SUPPORT input = { src };
+    D3D12_FEATURE_DATA_FORMAT_SUPPORT output = { dst };
+    if (!device || FAILED(device->CheckFeatureSupport(
+          D3D12_FEATURE_FORMAT_SUPPORT, &input, sizeof(input))) ||
+        FAILED(device->CheckFeatureSupport(
+          D3D12_FEATURE_FORMAT_SUPPORT, &output, sizeof(output))))
+      return false;
+    const D3D12_FORMAT_SUPPORT1 read = op == ExecOp::SCALE ?
+      D3D12_FORMAT_SUPPORT1_SHADER_SAMPLE :
+      D3D12_FORMAT_SUPPORT1_SHADER_LOAD;
+    return (input.Support1 & read) == read &&
+      (output.Support2 & D3D12_FORMAT_SUPPORT2_UAV_TYPED_STORE) != 0;
+  }
+}
+
+struct CFrameExec::Core : std::enable_shared_from_this<CFrameExec::Core>
+{
+  struct Fx
+  {
+    ExecOp                                  op = ExecOp::COPY;
+    ComPtr<ID3D12Resource>                  scratch;
+    std::unique_ptr<CColorTransformEffect>  color;
+    std::unique_ptr<CDownsampleEffect>      scale;
+    std::unique_ptr<CHDR16to10Effect>       hdr;
+    std::unique_ptr<CFormatEffect>          convert;
+
+    bool Init(const ComPtr<ID3D12Device3>& device, ExecOp selected,
+      const D12FrameFormat& src, const D12FrameFormat& dst, bool exported)
+    {
+      op = selected;
+
+      PostProcessStatus status = PostProcessStatus::SUCCESS;
+      D12FrameFormat    output = src;
+      output.desc.Flags        = dst.desc.Flags;
+      switch (op)
+      {
+        case ExecOp::COPY:
+          if (src.desc.Width  != dst.desc.Width  ||
+              src.desc.Height != dst.desc.Height ||
+              src.desc.Format != dst.desc.Format)
+            return false;
+          break;
+
+        case ExecOp::CAL:
+          color.reset(new (std::nothrow)
+            CColorTransformEffect(CalPart::MATRIX, true));
+          if (!color || !color->Init(device))
+            return false;
+          status = color->Cfg(device, src, output);
+          break;
+
+        case ExecOp::LUT:
+          color.reset(new (std::nothrow)
+            CColorTransformEffect(CalPart::LUT, true));
+          if (!color || !color->Init(device))
+            return false;
+          status = color->Cfg(device, src, output);
+          break;
+
+        case ExecOp::SCALE:
+          scale.reset(new (std::nothrow)
+            CDownsampleEffect(dst.width, dst.height));
+          if (!scale || !scale->Init(device))
+            return false;
+          status = scale->Cfg(device, src, output);
+          break;
+
+        case ExecOp::HDR10:
+          hdr.reset(new (std::nothrow) CHDR16to10Effect);
+          if (!hdr || !hdr->Init(device))
+            return false;
+          status = hdr->Cfg(device, src, output);
+          break;
+
+        case ExecOp::FORMAT:
+          convert.reset(new (std::nothrow) CFormatEffect);
+          if (!convert || !convert->Init(device))
+            return false;
+          status = convert->Cfg(device, src, dst);
+          output = dst;
+          break;
+      }
+
+      if (status != PostProcessStatus::SUCCESS ||
+          !D12::Same(output, dst, D12::FormatCmp::IMAGE))
+        return false;
+
+      if (!exported && !PostProcessUtil::CreateDefaultTexture(
+          device, dst.desc, scratch))
+        return false;
+      return true;
+    }
+
+    bool Run(const ComPtr<ID3D12Device3>& device,
+      const ComPtr<ID3D12GraphicsCommandList>& list,
+      ID3D12Resource * src, ID3D12Resource * dst)
+    {
+      if (!src || !dst)
+        return false;
+      if (op == ExecOp::COPY)
+        return Copy(list.Get(), src, dst);
+
+      ComPtr<ID3D12Resource> input = src;
+      RECT rect = {};
+      unsigned count = 0;
+      switch (op)
+      {
+        case ExecOp::CAL:
+        case ExecOp::LUT:
+          return color && color->Run(
+            device, list, input, dst, &rect, &count);
+        case ExecOp::SCALE:
+          return scale && scale->Run(
+            device, list, input, dst, &rect, &count);
+        case ExecOp::HDR10:
+          return hdr && hdr->Run(
+            device, list, input, dst, &rect, &count);
+        case ExecOp::FORMAT:
+          return convert && convert->Run(
+            device, list, input, dst, &rect, &count);
+        case ExecOp::COPY:
+          break;
+      }
+      return false;
+    }
+  };
+
+  struct Lane
+  {
+    Fx nodes[FRAME_GRAPH_MAX_NODES];
+  };
+
+  CSRWLock                      runLock;
+  std::shared_ptr<CD3D11Device> d11;
+  std::shared_ptr<CD3D12Device> d12;
+  ComPtr<ID3D12Device3>         device;
+  CTexHub                      * hub = nullptr;
+  CFrameGraph                   graph;
+  CD3D12CommandQueue            queue;
+  CTexPool                      pools[FRAME_GRAPH_MAX_NODES];
+  CInteropPool                  interop[FRAME_GRAPH_MAX_NODES];
+  Lane                          lanes[EXEC_LANES];
+  D12FrameFormat                formats[FRAME_GRAPH_MAX_NODES]  = {};
+  ExecOp                        ops[FRAME_GRAPH_MAX_NODES]      = {};
+  bool                          exported[FRAME_GRAPH_MAX_NODES] = {};
+  bool                          d11Node[FRAME_GRAPH_MAX_NODES]  = {};
+  unsigned                      readers[FRAME_GRAPH_MAX_NODES]  = {};
+  unsigned                      nodeCount                       = 0;
+  unsigned                      leafCount                       = 0;
+  unsigned                      nextLane                        = 0;
+  bool                          live                            = false;
+  std::atomic<bool>             forceFull { true };
+
+  ~Core()
+  {
+    // Effect descriptor heaps, scratch textures, and pool destinations are
+    // referenced by submitted lists. Drain before member destruction.
+    queue.WaitForIdle();
+  }
+
+  static bool Select(const GraphNode& parent,
+    const GraphNode& node, ExecOp& op)
+  {
+    switch (node.op)
+    {
+      case FrameOp::CAL:
+        op = ExecOp::CAL;
+        return true;
+      case FrameOp::LUT:
+        op = ExecOp::LUT;
+        return true;
+      case FrameOp::SCALE:
+        op = ExecOp::SCALE;
+        return true;
+      case FrameOp::HDR10:
+        if (parent.profile.signal == FrameSignal::SCRGB_LINEAR &&
+            node.profile.signal == FrameSignal::PQ_BT2020)
+        {
+          op = ExecOp::HDR10;
+          return true;
+        }
+        break;
+      case FrameOp::SDR:
+      case FrameOp::SCRGB:
+        break;
+      case FrameOp::SRC:
+        return false;
+    }
+
+    if (parent.width == node.width && parent.height == node.height &&
+        Frame::Same(parent.profile, node.profile))
+    {
+      op = ExecOp::COPY;
+      return true;
+    }
+    if (parent.width == node.width && parent.height == node.height &&
+        parent.profile.signal == FrameSignal::SRGB &&
+        node.profile.signal == FrameSignal::SRGB &&
+        parent.profile.pixel != node.profile.pixel)
+    {
+      op = ExecOp::FORMAT;
+      return true;
+    }
+    return false;
+  }
+
+  CfgResult Init(const CFrameGraph& source,
+    const std::shared_ptr<CD3D11Device>& d11Device,
+    const std::shared_ptr<CD3D12Device>& d12Device, CTexHub& texHub)
+  {
+    d11    = d11Device;
+    d12    = d12Device;
+    hub    = &texHub;
+    graph  = source;
+    device = d12 ? d12->GetDevice() : nullptr;
+    if (!d11 || !d12 || !device || !graph.Generation())
+      return CfgResult::FAILED;
+
+    const GraphNode * nodes = graph.Nodes(nodeCount);
+    const GraphLeaf * leaves = graph.Leaves(leafCount);
+    if (!nodes || !leaves || !nodeCount ||
+        nodeCount > FRAME_GRAPH_MAX_NODES ||
+        leafCount > TRANSPORT_MAX_INSTANCES)
+      return CfgResult::REJECTED;
+
+    unsigned texLeaves = 0;
+    for (unsigned leaf = 0; leaf < leafCount; ++leaf)
+      if (leaves[leaf].tex)
+      {
+        if (!leaves[leaf].node || leaves[leaf].node >= nodeCount)
+          return CfgResult::REJECTED;
+        exported[leaves[leaf].node] = true;
+        ++readers[leaves[leaf].node];
+        d11Node[leaves[leaf].node] |=
+          leaves[leaf].cfg.profile.storage ==
+            FrameStorage::D3D11_TEXTURE;
+        ++texLeaves;
+      }
+
+    if (!texLeaves)
+      return CfgResult::ACCEPTED;
+    if (!nodes[0].texRefs || !queue.Init(device.Get(),
+        D3D12_COMMAND_LIST_TYPE_DIRECT, L"Frame Graph",
+        CD3D12CommandSlot::FAST, EXEC_LANES, false, true))
+      return CfgResult::FAILED;
+
+    const GraphCfg& cfg = graph.Cfg();
+    formats[0] = MakeFormat(cfg.src, cfg.srcWidth, cfg.srcHeight,
+      cfg.transform);
+
+    for (unsigned node = 1; node < nodeCount; ++node)
+    {
+      if (!nodes[node].texRefs)
+        continue;
+      if (nodes[node].texRefs > nodes[node].refs ||
+          nodes[node].parent >= node ||
+          !nodes[nodes[node].parent].texRefs ||
+          !Select(nodes[nodes[node].parent], nodes[node], ops[node]))
+        return CfgResult::REJECTED;
+
+      D3D12_RESOURCE_FLAGS flags = ops[node] == ExecOp::COPY &&
+        exported[node] ?
+        D3D12_RESOURCE_FLAG_NONE :
+        D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS;
+      if (exported[node] && readers[node] > 1)
+        flags |= D3D12_RESOURCE_FLAG_ALLOW_SIMULTANEOUS_ACCESS;
+      formats[node] = MakeFormat(nodes[node].profile,
+        nodes[node].width, nodes[node].height, cfg.transform, flags);
+      if (!Supports(device.Get(), ops[node],
+          formats[nodes[node].parent].desc.Format,
+          formats[node].desc.Format))
+        return CfgResult::REJECTED;
+
+      if (exported[node])
+      {
+        const FrameProfile profile = Frame::Store(
+          nodes[node].profile, FrameStorage::D3D12_TEXTURE);
+        const TexResult result = pools[node].Init(device.Get(),
+          graph.Generation(), node, profile, formats[node].desc,
+          D3D12_RESOURCE_STATE_COMMON, EXEC_SLOTS, graph.Shared(node));
+        if (result != TexResult::OK)
+          return CfgFromTex(result);
+        if (d11Node[node])
+        {
+          const TexResult interopResult = interop[node].Init(d11, d12);
+          if (interopResult != TexResult::OK)
+            return CfgFromTex(interopResult);
+        }
+      }
+    }
+
+    for (unsigned lane = 0; lane < EXEC_LANES; ++lane)
+      for (unsigned node = 1; node < nodeCount; ++node)
+        if (nodes[node].texRefs && !lanes[lane].nodes[node].Init(
+            device, ops[node], formats[nodes[node].parent], formats[node],
+            exported[node]))
+          return CfgResult::REJECTED;
+
+    live = true;
+    return CfgResult::ACCEPTED;
+  }
+
+  FrameContentRef Content(uint64_t serial, const D12FrameFormat& format,
+    uint64_t captureTime, bool full, FrameDamage damage,
+    const RECT * rects, unsigned count)
+  {
+    if (!serial || count > FRAME_DAMAGE_MAX ||
+        (count && !rects) ||
+        (damage == FrameDamage::RECTS) != (count != 0))
+      return {};
+
+    FrameContent * raw = new (std::nothrow) FrameContent;
+    if (!raw)
+      return {};
+    raw->serial      = serial;
+    raw->captureTime = captureTime;
+    raw->damage      = full ? FrameDamage::FULL : damage;
+    raw->count       = raw->damage == FrameDamage::RECTS ? count : 0;
+    if (raw->count)
+      memcpy(raw->rects, rects, raw->count * sizeof(*rects));
+    raw->format      = format;
+
+    try
+    {
+      return FrameContentRef(raw);
+    }
+    catch (const std::bad_alloc&)
+    {
+      return {};
+    }
+  }
+
+  TexResult Run(CInteropResource& src, const D12FrameFormat& sourceFormat,
+    uint64_t serial, uint64_t captureTime, uint64_t postStart,
+    FrameDamage damage, const RECT * rects, unsigned count) noexcept
+  {
+    if (!live)
+      return TexResult::OK;
+
+    CSRWExclusiveLock run = CSRWExclusiveLock::Try(runLock);
+    if (!run)
+    {
+      Atomic::Store(forceFull, true, std::memory_order_release);
+      return TexResult::BUSY;
+    }
+    const bool full = Atomic::Swap(forceFull, false, std::memory_order_acq_rel);
+
+    ID3D12Resource * source = src.GetRes().Get();
+    if (!source)
+    {
+      Atomic::Store(forceFull, true, std::memory_order_release);
+      return TexResult::REJECTED;
+    }
+    const D3D12_RESOURCE_DESC actual = source->GetDesc();
+    if (!D12::Same(actual, sourceFormat.desc, D12::DescCmp::COPY))
+    {
+      Atomic::Store(forceFull, true, std::memory_order_release);
+      return TexResult::REJECTED;
+    }
+
+    const FrameContentRef content = Content(
+      serial, sourceFormat, captureTime, full, damage, rects, count);
+    FrameDesc check;
+    unsigned first = 0;
+    while (++first < nodeCount && !exported[first]) {}
+    if (!content || first == nodeCount ||
+        !graph.Desc(first, content, check))
+    {
+      Atomic::Store(forceFull, true, std::memory_order_release);
+      return TexResult::REJECTED;
+    }
+
+    CD3D12CommandSlot * slot = nullptr;
+    unsigned lane = 0;
+    for (unsigned attempt = 0; attempt < EXEC_LANES; ++attempt)
+    {
+      lane = (nextLane + attempt) % EXEC_LANES;
+      slot = queue.Try(lane);
+      if (slot)
+      {
+        nextLane = (lane + 1) % EXEC_LANES;
+        break;
+      }
+    }
+    if (!slot)
+    {
+      Atomic::Store(forceFull, true, std::memory_order_release);
+      return queue.Failed() ? TexResult::FAILED : TexResult::BUSY;
+    }
+
+    TexWrite writes[FRAME_GRAPH_MAX_NODES];
+    const GraphNode * nodes = graph.Nodes(nodeCount);
+    TexResult result = TexResult::OK;
+    for (unsigned node = 1; node < nodeCount; ++node)
+      if (exported[node])
+      {
+        result = pools[node].Try(writes[node]);
+        if (result != TexResult::OK)
+          break;
+      }
+    if (result != TexResult::OK)
+    {
+      for (unsigned node = 1; node < nodeCount; ++node)
+        writes[node].Cancel();
+      slot->Cancel();
+      Atomic::Store(forceFull, true, std::memory_order_release);
+      return result;
+    }
+
+    if (!src.Signal() || !src.Sync(*slot))
+    {
+      for (unsigned node = 1; node < nodeCount; ++node)
+        writes[node].Cancel();
+      slot->Cancel();
+      Atomic::Store(forceFull, true, std::memory_order_release);
+      return TexResult::FAILED;
+    }
+
+    ComPtr<ID3D12GraphicsCommandList> list = slot->GetGfxList();
+    ID3D12Resource * outputs[FRAME_GRAPH_MAX_NODES] = {};
+    outputs[0] = source;
+    bool recorded = !!list && !!outputs[0];
+    for (unsigned node = 1; recorded && node < nodeCount; ++node)
+      if (nodes[node].texRefs)
+      {
+        ID3D12Resource * output = exported[node] ?
+          writes[node].Get() : lanes[lane].nodes[node].scratch.Get();
+        recorded = output && lanes[lane].nodes[node].Run(
+          device, list, outputs[nodes[node].parent], output);
+        outputs[node] = output;
+      }
+
+    if (!recorded)
+    {
+      for (unsigned node = 1; node < nodeCount; ++node)
+        writes[node].Cancel();
+      slot->Cancel();
+      Atomic::Store(forceFull, true, std::memory_order_release);
+      return TexResult::FAILED;
+    }
+
+    D12Sync sync;
+    if (!slot->Execute(&sync))
+    {
+      const bool submitted = slot->HasSubmittedWork();
+      for (unsigned node = 1; node < nodeCount; ++node)
+        if (submitted)
+          writes[node].Fail(sync);
+        else
+          writes[node].Cancel();
+      Atomic::Store(forceFull, true, std::memory_order_release);
+      return TexResult::FAILED;
+    }
+
+    const FrameTime time = { postStart, 0, 0, 0, false, false };
+    TexLease leases[FRAME_GRAPH_MAX_NODES];
+    const std::shared_ptr<void> hold = shared_from_this();
+    bool sealed = true;
+    for (unsigned node = 1; node < nodeCount; ++node)
+      if (exported[node])
+      {
+        FrameDesc desc;
+        if (!graph.Desc(node, content, desc) ||
+            !writes[node].Seal(desc, time, sync, leases[node], hold))
+        {
+          sealed = false;
+          break;
+        }
+      }
+    if (!sealed)
+    {
+      for (unsigned node = 1; node < nodeCount; ++node)
+      {
+        if (writes[node])
+          writes[node].Fail(sync);
+        leases[node].Reset();
+      }
+      Atomic::Store(forceFull, true, std::memory_order_release);
+      return TexResult::FAILED;
+    }
+
+    bool dropped = false;
+    bool failed  = false;
+    const GraphLeaf * leaves = graph.Leaves(leafCount);
+    for (unsigned leaf = 0; leaf < leafCount; ++leaf)
+    {
+      if (!leaves[leaf].tex)
+        continue;
+
+      FrameIn frame;
+      frame.graph = graph.Generation();
+      if (!graph.Desc(leaf, content, frame.desc))
+      {
+        dropped = true;
+        continue;
+      }
+
+      PushResult pushed = PushResult::STALE;
+      const unsigned node = leaves[leaf].node;
+      if (leaves[leaf].cfg.profile.storage ==
+          FrameStorage::D3D12_TEXTURE)
+      {
+        pushed = hub->Push(frame, leases[node]);
+      }
+      else
+      {
+        D11Lease lease;
+        const TexResult opened = interop[node].Get(leases[node], lease);
+        if (opened == TexResult::OK)
+          pushed = hub->Push(frame, std::move(lease));
+        else if (opened == TexResult::BUSY)
+          pushed = PushResult::BUSY;
+        else
+        {
+          pushed = opened == TexResult::REJECTED ?
+            PushResult::REJECTED : PushResult::FAILED;
+          hub->Fault(frame, pushed);
+        }
+      }
+
+      if (pushed == PushResult::BUSY || pushed == PushResult::STALE)
+        dropped = true;
+      else if (pushed == PushResult::FAILED)
+        failed = true;
+    }
+
+    if (dropped)
+      Atomic::Store(forceFull, true, std::memory_order_release);
+    if (failed)
+      return TexResult::FAILED;
+    return dropped ? TexResult::BUSY : TexResult::OK;
+  }
+};
+
+CFrameExec::~CFrameExec()
+{
+  Reset();
+}
+
+bool CFrameExec::Init(const std::shared_ptr<CD3D11Device>& d11,
+  const std::shared_ptr<CD3D12Device>& d12, CTexHub& hub)
+{
+  if (!d11 || !d12 || !d11->GetDevice() || !d12->GetDevice())
+    return false;
+  CSRWExclusiveLock lock(m_lock);
+  if (m_d11 || m_d12 || m_hub)
+    return false;
+  m_d11 = d11;
+  m_d12 = d12;
+  m_hub = &hub;
+  return true;
+}
+
+void CFrameExec::Reset()
+{
+  std::shared_ptr<Core> active;
+  std::shared_ptr<Core> pending;
+  {
+    CSRWExclusiveLock lock(m_lock);
+    active  = std::move(m_active);
+    pending = std::move(m_pending);
+    m_hub   = nullptr;
+    m_d12.reset();
+    m_d11.reset();
+  }
+  pending.reset();
+  active.reset();
+}
+
+uint64_t CFrameExec::NextSerial()
+{
+  return Atomic::Next(m_serial);
+}
+
+CfgResult CFrameExec::Prep(const CFrameGraph& graph) noexcept
+{
+  std::shared_ptr<CD3D11Device> d11;
+  std::shared_ptr<CD3D12Device> d12;
+  CTexHub * hub = nullptr;
+  {
+    CSRWSharedLock lock(m_lock);
+    if (m_pending)
+      return CfgResult::REJECTED;
+    d11 = m_d11;
+    d12 = m_d12;
+    hub = m_hub;
+  }
+  if (!d11 || !d12 || !hub)
+    return CfgResult::FAILED;
+
+  std::shared_ptr<Core> next;
+  try
+  {
+    next.reset(new (std::nothrow) Core);
+  }
+  catch (const std::bad_alloc&)
+  {
+    return CfgResult::FAILED;
+  }
+  if (!next)
+    return CfgResult::FAILED;
+
+  CfgResult result = CfgResult::FAILED;
+  try
+  {
+    result = next->Init(graph, d11, d12, *hub);
+  }
+  catch (...)
+  {
+    return CfgResult::FAILED;
+  }
+  if (result != CfgResult::ACCEPTED)
+    return result;
+
+  {
+    CSRWExclusiveLock lock(m_lock);
+    if (m_pending || m_d11 != d11 || m_d12 != d12 || m_hub != hub)
+      return CfgResult::RETRY;
+    m_pending = next;
+  }
+  return CfgResult::ACCEPTED;
+}
+
+void CFrameExec::Commit() noexcept
+{
+  std::shared_ptr<Core> old;
+  {
+    CSRWExclusiveLock lock(m_lock);
+    if (!m_pending)
+      return;
+    old      = std::move(m_active);
+    m_active = std::move(m_pending);
+  }
+  old.reset();
+}
+
+void CFrameExec::Abort() noexcept
+{
+  std::shared_ptr<Core> drop;
+  {
+    CSRWExclusiveLock lock(m_lock);
+    drop = std::move(m_pending);
+  }
+  drop.reset();
+}
+
+TexResult CFrameExec::Run(CInteropResource& src,
+  const D12FrameFormat& format, uint64_t captureTime, uint64_t postStart,
+  FrameDamage damage, const RECT * rects, unsigned count) noexcept
+{
+  std::shared_ptr<Core> core;
+  {
+    CSRWSharedLock lock(m_lock);
+    core = m_active;
+  }
+  if (!core || !core->live)
+    return TexResult::OK;
+  return core->Run(src, format, NextSerial(), captureTime, postStart,
+    damage, rects, count);
+}

idd/LGIdd/capture/CFrameExec.h

@@ -0,0 +1,71 @@
+/**
+ * Looking Glass
+ * Copyright © 2017-2026 The Looking Glass Authors
+ * https://looking-glass.io
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc., 59
+ * Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#pragma once
+
+#include "Atomic.h"
+#include "CSRWLock.h"
+#include "capture/CFrameGraph.h"
+#include "capture/CFrameTex.h"
+#include "transport/ITexStage.h"
+
+#include <memory>
+
+class CInteropResource;
+class CTexHub;
+struct CD3D11Device;
+struct CD3D12Device;
+
+// Transactional executor for texture-backed transport routes. Every product
+// is materialized in executor-owned storage before the acquired IddCx surface
+// is released. A graph containing only legacy routes remains fully dormant.
+class CFrameExec final : public ITexStage
+{
+private:
+  struct Core;
+
+  mutable CSRWLock               m_lock;
+  std::shared_ptr<CD3D11Device>  m_d11;
+  std::shared_ptr<CD3D12Device>  m_d12;
+  CTexHub                      * m_hub = nullptr;
+  std::shared_ptr<Core>          m_active;
+  std::shared_ptr<Core>          m_pending;
+  std::atomic<uint64_t>          m_serial { 0 };
+
+  uint64_t NextSerial();
+
+public:
+  CFrameExec() = default;
+  ~CFrameExec();
+  CFrameExec(const CFrameExec&) = delete;
+  CFrameExec& operator=(const CFrameExec&) = delete;
+
+  bool Init(const std::shared_ptr<CD3D11Device>& d11,
+    const std::shared_ptr<CD3D12Device>& d12, CTexHub& hub);
+  void Reset();
+
+  CfgResult Prep(const CFrameGraph& graph) noexcept override;
+  void Commit() noexcept override;
+  void Abort() noexcept override;
+
+  TexResult Run(CInteropResource& src, const D12FrameFormat& format,
+    uint64_t captureTime, uint64_t postStart, FrameDamage damage,
+    const RECT * rects, unsigned count) noexcept;
+};

idd/LGIdd/capture/CFrameGraph.cpp

@@ -241,7 +241,7 @@ unsigned CFrameGraph::Checkpoint(const FrameProfile& requested)
 }
 
 bool CFrameGraph::Add(BackendId id, uint32_t epoch, bool required,
-  bool primary, const FrameCfg& cfg)
+  bool primary, bool tex, const FrameCfg& cfg)
 {
   if (!id || !epoch || !Can(cfg) ||
       m_leafCount == TRANSPORT_MAX_INSTANCES)
@@ -266,11 +266,16 @@ bool CFrameGraph::Add(BackendId id, uint32_t epoch, bool required,
   leaf.node     = node;
   leaf.required = required;
   leaf.primary  = primary;
+  leaf.tex      = tex;
   leaf.cfg      = cfg;
 
   for (unsigned current = node;
        current != FRAME_GRAPH_ROOT; current = m_nodes[current].parent)
+  {
     ++m_nodes[current].refs;
+    if (tex)
+      ++m_nodes[current].texRefs;
+  }
   return true;
 }
 
@@ -284,6 +289,9 @@ bool CFrameGraph::Seal()
     if (!m_leaves[i].id || !m_leaves[i].epoch ||
         !m_leaves[i].node || m_leaves[i].node >= m_nodeCount)
       return false;
+  for (unsigned i = 0; i < m_nodeCount; ++i)
+    if (!m_nodes[i].refs || m_nodes[i].texRefs > m_nodes[i].refs)
+      return false;
 
   m_sealed = true;
   return true;
@@ -324,17 +332,19 @@ bool CFrameGraph::Want(FrameSignal signal) const
 
 bool CFrameGraph::Shared(unsigned node) const
 {
-  if (!m_sealed || !node || node >= m_nodeCount)
+  if (!m_sealed || !node || node >= m_nodeCount ||
+      !m_nodes[node].texRefs)
     return false;
   for (unsigned i = 0; i < m_leafCount; ++i)
-    if (m_leaves[i].node                == node &&
+    if (m_leaves[i].tex                         &&
+        m_leaves[i].node                == node &&
         m_leaves[i].cfg.profile.storage == FrameStorage::D3D11_TEXTURE)
       return true;
   return false;
 }
 
-bool CFrameGraph::Desc(unsigned leaf, const FrameContentRef& content,
+bool CFrameGraph::Desc(unsigned nodeIndex,
-  LeafDesc& desc) const
+  const FrameContentRef& content, FrameDesc& desc) const
 {
   if (!content)
     return false;
@@ -343,11 +353,14 @@ bool CFrameGraph::Desc(unsigned leaf, const FrameContentRef& content,
   FrameProfile sourceProfile;
   const bool validProfile = D12::Profile(source,
     FrameStorage::D3D12_TEXTURE, sourceProfile);
+  const auto effectiveTransform =
+    D12::Transform(source.colorTransform);
   if (!validProfile || !Frame::Same(sourceProfile, m_cfg.src))
     return false;
 
   if (!m_sealed                                                ||
-      leaf                         >= m_leafCount           ||
+      !nodeIndex                                               ||
+      nodeIndex                    >= m_nodeCount              ||
       !content->serial                                         ||
       source.width                 != m_cfg.srcWidth           ||
       source.height                != m_cfg.srcHeight          ||
@@ -361,41 +374,57 @@ bool CFrameGraph::Desc(unsigned leaf, const FrameContentRef& content,
       source.desc.DepthOrArraySize != 1                        ||
       source.desc.MipLevels        != 1                        ||
       source.desc.SampleDesc.Count != 1                        ||
+      effectiveTransform           != m_cfg.transform          ||
       !Frame::Valid(content->damage, content->rects, content->count,
         m_cfg.srcWidth, m_cfg.srcHeight))
     return false;
 
-  const GraphLeaf& route = m_leaves[leaf];
+  const GraphNode& node = m_nodes[nodeIndex];
-  const GraphNode& node  = m_nodes[route.node];
+  FrameDesc result;
-  desc.id      = route.id;
+  result.content = content;
-  desc.epoch   = route.epoch;
+  result.damage  = content->damage;
-  desc.node    = route.node;
+  result.count   = content->count;
-  desc.profile = route.cfg.profile;
-
-  desc.frame         = FrameDesc {};
-  desc.frame.content = content;
-  desc.frame.damage  = content->damage;
-  desc.frame.count   = content->count;
   if (content->count)
-    memcpy(desc.frame.rects, content->rects,
+    memcpy(result.rects, content->rects,
       content->count * sizeof(*content->rects));
-  desc.frame.format  = content->format;
+  result.format  = content->format;
 
   // A scaled checkpoint has a different damage coordinate space. Until the
   // executor owns exact edge transforms, preserve correctness by making any
   // partial source damage a full node update.
-  if (desc.frame.damage == FrameDamage::RECTS &&
+  if (result.damage == FrameDamage::RECTS &&
       (node.width != m_cfg.srcWidth || node.height != m_cfg.srcHeight))
   {
-    desc.frame.damage = FrameDamage::FULL;
+    result.damage = FrameDamage::FULL;
-    desc.frame.count  = 0;
+    result.count  = 0;
   }
 
-  D12FrameFormat& format = desc.frame.format;
+  D12FrameFormat& output = result.format;
-  if (!D12::Set(format, node.profile, node.width, node.height))
+  if (!D12::Set(output, node.profile, node.width, node.height))
     return false;
   // Calibration/LUT nodes have already consumed this transform.
-  format.colorTransform.reset();
+  output.colorTransform.reset();
+
+  desc = result;
+  return true;
+}
+
+bool CFrameGraph::Desc(unsigned leaf, const FrameContentRef& content,
+  LeafDesc& desc) const
+{
+  if (!m_sealed || leaf >= m_leafCount)
+    return false;
+
+  const GraphLeaf& route = m_leaves[leaf];
+  LeafDesc result;
+  if (!Desc(route.node, content, result.frame))
+    return false;
+
+  result.id      = route.id;
+  result.epoch   = route.epoch;
+  result.node    = route.node;
+  result.profile = route.cfg.profile;
+  desc = result;
   return true;
 }
 

idd/LGIdd/capture/CFrameGraph.h

@@ -75,7 +75,9 @@ struct GraphNode
 {
   FrameOp      op      = FrameOp::SRC;
   unsigned     parent  = FRAME_GRAPH_ROOT;
+  // refs covers every route; texRefs is the direct texture-route closure.
   unsigned     refs    = 0;
+  unsigned     texRefs = 0;
   unsigned     width   = 0;
   unsigned     height  = 0;
   FrameProfile profile;
@@ -88,6 +90,7 @@ struct GraphLeaf
   unsigned  node     = 0;
   bool      required = false;
   bool      primary  = false;
+  bool      tex      = false;
   FrameCfg  cfg;
 };
 
@@ -149,13 +152,15 @@ public:
   bool Begin(const GraphCfg& cfg);
   bool Can(const FrameCfg& cfg) const;
   bool Add(BackendId id, uint32_t epoch, bool required, bool primary,
-    const FrameCfg& cfg);
+    bool tex, const FrameCfg& cfg);
   bool Seal();
   bool Stamp(uint64_t generation);
   bool Same(const GraphCfg& cfg) const;
   bool Want(FrameSignal signal) const;
   bool Need(FrameOp op) const;
   bool Shared(unsigned node) const;
+  bool Desc(unsigned node, const FrameContentRef& content,
+    FrameDesc& desc) const;
   bool Desc(unsigned leaf, const FrameContentRef& content,
     LeafDesc& desc) const;
 

idd/LGIdd/capture/CFrameTex.cpp

@@ -297,11 +297,13 @@ CFrameTex::CFrameTex(uint64_t graphValue, uint64_t poolValue,
   const FrameProfile& profileValue,
   const FrameDesc& frameValue, const FrameTime& timeValue,
   const ComPtr<ID3D12Resource>& res,
-  const D12Sync& sync, D3D12_RESOURCE_STATES state, bool sharedValue) :
+  const D12Sync& sync, D3D12_RESOURCE_STATES state, bool sharedValue,
+  const std::shared_ptr<void>& hold) :
   m_res(res),
   m_sync(sync),
   m_state(state),
   m_shared(sharedValue),
+  m_hold(hold),
   graph(graphValue),
   pool(poolValue),
   node(nodeValue),
@@ -378,7 +380,8 @@ ID3D12Resource * TexWrite::Get() const
 }
 
 bool TexWrite::Seal(const FrameDesc& frame, const FrameTime& time,
-  const D12Sync& sync, TexLease& lease)
+  const D12Sync& sync, TexLease& lease,
+  const std::shared_ptr<void>& hold)
 {
   if (!m_core || !sync.Valid())
     return false;
@@ -415,7 +418,7 @@ bool TexWrite::Seal(const FrameDesc& frame, const FrameTime& time,
 
   CFrameTex * raw = new (std::nothrow) CFrameTex(core->graph, core->id,
     core->node, m_index, m_version, core->profile, desc, time, resource,
-    sync, core->read, core->shared);
+    sync, core->read, core->shared, hold);
   if (!raw)
   {
     core->Drop(index, generation);
@@ -445,6 +448,13 @@ bool TexWrite::Seal(const FrameDesc& frame, const FrameTime& time,
   return true;
 }
 
+void TexWrite::Fail(const D12Sync& sync)
+{
+  if (m_core)
+    m_core->Fail(m_index, m_version, sync);
+  Clear();
+}
+
 void TexWrite::Cancel()
 {
   if (m_core)

idd/LGIdd/capture/CFrameTex.h

@@ -60,12 +60,14 @@ private:
   D12Sync                 m_sync;
   D3D12_RESOURCE_STATES   m_state;
   bool                    m_shared;
+  std::shared_ptr<void>    m_hold;
 
   CFrameTex(uint64_t graph, uint64_t pool, unsigned node, unsigned slot,
     uint64_t version, const FrameProfile& profile, const FrameDesc& frame,
     const FrameTime& time, const ComPtr<ID3D12Resource>& res,
     const D12Sync& sync,
-    D3D12_RESOURCE_STATES state, bool shared);
+    D3D12_RESOURCE_STATES state, bool shared,
+    const std::shared_ptr<void>& hold);
 
 public:
   CFrameTex(const CFrameTex&) = delete;
@@ -141,15 +143,17 @@ public:
   // Seal only after producer commands restore the texture to the pool's
   // configured immutable state and Execute returns this exact sync point.
   bool Seal(const FrameDesc& frame, const FrameTime& time,
-    const D12Sync& sync, TexLease& lease);
+    const D12Sync& sync, TexLease& lease,
+    const std::shared_ptr<void>& hold = {});
+  void Fail(const D12Sync& sync);
   void Cancel();
 };
 
 // One pool owns interchangeable textures for a single graph node. Reset stops
 // acquisition and drains every sealed producer point. Existing writers and
 // leases keep the retired core alive. Reset invalidates writers; a writer
-// which already submitted must still Seal so its point is safely drained,
+// which already submitted must still Seal or Fail so its point is safely
-// but it will not publish a product from the retired generation.
+// drained, but it will not publish a product from the retired generation.
 // The configured state is the promised state presented to every consumer;
 // it is not queried from D3D12. Consumers may read but never transition or
 // write a shared product.

idd/LGIdd/capture/CSwapChainProcessor.cpp

@@ -161,6 +161,12 @@ bool CSwapChainProcessor::InitializePipeline()
     return false;
 
   m_resPool.Init(m_dx11Device, m_dx12Device);
+  if (!m_exec.Init(m_dx11Device, m_dx12Device,
+      m_devContext->GetTransport().Tex()))
+  {
+    DEBUG_ERROR("Failed to initialize the frame graph executor");
+    return false;
+  }
   const bool enableEffects = !m_dx11Device->IsSoftware();
   if (!enableEffects)
     DEBUG_INFO("Software render adapter: post-processing disabled");
@@ -233,6 +239,7 @@ CSwapChainProcessor::~CSwapChainProcessor()
   // Drain in-flight GPU work / completion callbacks before releasing the
   // resources they reference. The swap chain was already released in the
   // worker epilogue, so this does not hold an IddCx frame.
+  m_exec.Reset();
   if (m_dx12Device)
   {
     m_dx12Device->WaitForIdle();
@@ -565,7 +572,7 @@ void CSwapChainProcessor::CfgGraph()
 
   m_graphPending = false;
   const CfgResult result =
-    transport.Cfg(m_graphCfg, m_graphRev, m_graph);
+    transport.Cfg(m_graphCfg, m_graphRev, m_graph, &m_exec);
   if (result == CfgResult::ACCEPTED)
   {
     m_graphRetryAt = 0;
@@ -659,6 +666,8 @@ bool CSwapChainProcessor::SwapChainNewFrame(ComPtr<IDXGIResource> acquiredBuffer
 
   D12FrameFormat srcFormat = {};
   srcFormat.desc           = srcDesc;
+  srcFormat.dataWidth      = (unsigned)srcDesc.Width;
+  srcFormat.dataHeight     = srcDesc.Height;
   srcFormat.width          = (unsigned)srcDesc.Width;
   srcFormat.height         = srcDesc.Height;
   srcFormat.format         = D12::Type(srcDesc.Format);
@@ -825,6 +834,22 @@ bool CSwapChainProcessor::SwapChainNewFrame(ComPtr<IDXGIResource> acquiredBuffer
   if (needsReconfigure || postProcessFormatChanged || frameMetadataChanged)
     m_transport.ForceFrame();
 
+  const FrameDamage texDamage = noImageUpdate ? FrameDamage::NONE :
+    (fullDamage || !resolvedDirtyRectCount ?
+      FrameDamage::FULL : FrameDamage::RECTS);
+  const unsigned texRectCount = texDamage == FrameDamage::RECTS ?
+    resolvedDirtyRectCount : 0;
+  // This call is a no-op for the current legacy-only LGMP graph. When a
+  // texture route is selected, every read of the borrowed source is submitted
+  // here before FinishedProcessingFrame releases the IddCx surface.
+  const TexResult texResult = m_exec.Run(*srcRes, srcFormat, captureTime,
+    postProcessStart, texDamage, dirtyRects, texRectCount);
+  if (texResult == TexResult::FAILED && m_haveGraphCfg)
+  {
+    m_graphPending = true;
+    m_graphRetryAt = CFrameScheduler::Nanotime() + GRAPH_RETRY_NS;
+  }
+
   const FrameSubmission submission =
   {
     srcRes,

idd/LGIdd/capture/CSwapChainProcessor.h

@@ -25,6 +25,7 @@
 #include "d3d/CD3D12Device.h"
 #include "display/IddCxCompat.h"
 #include "d3d/CInteropResourcePool.h"
+#include "capture/CFrameExec.h"
 #include "capture/CFrameGraph.h"
 #include "capture/CFrameProcessor.h"
 #include "postprocess/D12FrameFormat.h"
@@ -57,6 +58,7 @@ private:
   HANDLE                           m_newFrameEvent;
 
   CInteropResourcePool             m_resPool;
+  CFrameExec                       m_exec;
   CFrameGraph                      m_graph;
   GraphCfg                         m_graphCfg;
   bool                             m_haveGraphCfg    = false;

idd/LGIdd/d3d/CD3D12CommandQueue.cpp

@@ -507,6 +507,21 @@ void CD3D12CommandQueue::DeInit()
   m_qpcFrequency    = 0;
 }
 
+CD3D12CommandSlot * CD3D12CommandQueue::Try(UINT slotIndex)
+{
+  if (slotIndex >= m_slotCount)
+    return nullptr;
+
+  CD3D12CommandSlot& slot = m_slots[slotIndex];
+  if (slot.Acquire())
+    return &slot;
+
+  // The GPU may already be finished while its thread-pool callback is
+  // still pending. Complete it here without waiting for callback dispatch.
+  slot.OnCompletion(false);
+  return slot.Acquire() ? &slot : nullptr;
+}
+
 CD3D12CommandSlot * CD3D12CommandQueue::Acquire(UINT slotIndex)
 {
   if (slotIndex >= m_slotCount)
@@ -515,14 +530,8 @@ CD3D12CommandSlot * CD3D12CommandQueue::Acquire(UINT slotIndex)
   const ULONGLONG deadline = GetTickCount64() + 100;
   for (;;)
   {
-    if (m_slots[slotIndex].Acquire())
+    if (CD3D12CommandSlot * slot = Try(slotIndex))
-      return &m_slots[slotIndex];
+      return slot;
-
-    // The GPU may already be finished while its thread-pool callback is
-    // still pending. Complete it here before sleeping on callback dispatch.
-    m_slots[slotIndex].OnCompletion(false);
-    if (m_slots[slotIndex].Acquire())
-      return &m_slots[slotIndex];
     if (Atomic::Load(m_failed, std::memory_order_acquire))
       break;
 
@@ -549,16 +558,7 @@ CD3D12CommandSlot * CD3D12CommandQueue::Acquire()
   // The unindexed path is used for immediate software publication. Keep at
   // most one copy in flight so a newer frame is dropped instead of queued
   // behind bandwidth-bound work which is already stale.
-  CD3D12CommandSlot& slot = m_slots[0];
+  return Try(0);
-  if (slot.Acquire())
-    return &slot;
-
-  // Complete already-fenced work without waiting for callback dispatch.
-  slot.OnCompletion(false);
-  if (slot.Acquire())
-    return &slot;
-
-  return nullptr;
 }
 
 void CD3D12CommandQueue::WaitForIdle()

idd/LGIdd/d3d/CD3D12CommandQueue.h

@@ -201,7 +201,12 @@ class CD3D12CommandQueue
       UINT slotCount, bool enableTiming = false, bool sharedFence = false);
     void DeInit();
 
+    CD3D12CommandSlot * Try(UINT slotIndex);
     CD3D12CommandSlot * Acquire(UINT slotIndex);
     CD3D12CommandSlot * Acquire();
+    bool Failed() const
+    {
+      return Atomic::Load(m_failed, std::memory_order_acquire);
+    }
     void WaitForIdle();
 };

idd/LGIdd/postprocess/effect/CColorTransformEffect.cpp

@@ -165,6 +165,20 @@ bool CColorTransformEffect::Init(const ComPtr<ID3D12Device3>& device)
 PostProcessStatus CColorTransformEffect::SetFormat(
   const ComPtr<ID3D12Device3>& device,
   const D12FrameFormat& src, D12FrameFormat& dst)
+{
+  return Set(device, src, dst, true);
+}
+
+PostProcessStatus CColorTransformEffect::Cfg(
+  const ComPtr<ID3D12Device3>& device,
+  const D12FrameFormat& src, D12FrameFormat& dst)
+{
+  return Set(device, src, dst, false);
+}
+
+PostProcessStatus CColorTransformEffect::Set(
+  const ComPtr<ID3D12Device3>& device,
+  const D12FrameFormat& src, D12FrameFormat& dst, bool own)
 {
   const auto transform = D12::Transform(src.colorTransform);
   if (!transform)
@@ -205,10 +219,15 @@ PostProcessStatus CColorTransformEffect::SetFormat(
 
   D3D12_RESOURCE_DESC desc = src.desc;
   desc.Format = dstFormat;
-  desc.Flags  = D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS;
+  desc.Flags  = own ? D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS :
-  if (!m_dst || m_dst->GetDesc().Width  != desc.Width  ||
+    dst.desc.Flags;
+  if (!(desc.Flags & D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS))
+    return PostProcessStatus::FAILED;
+  if (own &&
+      (!m_dst                                      ||
+       m_dst->GetDesc().Width  != desc.Width       ||
        m_dst->GetDesc().Height != desc.Height      ||
-                m_dst->GetDesc().Format != desc.Format)
+       m_dst->GetDesc().Format != desc.Format))
   {
     if (!CreateDefaultTexture(device, desc, m_dst))
       return PostProcessStatus::FAILED;
@@ -230,6 +249,7 @@ PostProcessStatus CColorTransformEffect::SetFormat(
 
   m_srcFormat = src.desc.Format;
   m_dstFormat = dstFormat;
+  m_outDesc   = desc;
   m_threadsX  = Groups((unsigned)desc.Width);
   m_threadsY  = Groups(desc.Height);
 
@@ -245,6 +265,30 @@ ComPtr<ID3D12Resource> CColorTransformEffect::Run(
   const ComPtr<ID3D12GraphicsCommandList>& commandList,
   const ComPtr<ID3D12Resource>& src, RECT dirtyRects[],
   unsigned * nbDirtyRects)
+{
+  if (!m_dst || !Draw(device, commandList, src, m_dst.Get(),
+      dirtyRects, nbDirtyRects))
+    return nullptr;
+  return m_dst;
+}
+
+bool CColorTransformEffect::Run(
+  const ComPtr<ID3D12Device3>& device,
+  const ComPtr<ID3D12GraphicsCommandList>& commandList,
+  const ComPtr<ID3D12Resource>& src, ID3D12Resource * dst,
+  RECT dirtyRects[], unsigned * nbDirtyRects)
+{
+  if (!device || !commandList || !src || src.Get() == dst || !IsDst(dst))
+    return false;
+  return Draw(device, commandList, src, dst,
+    dirtyRects, nbDirtyRects);
+}
+
+bool CColorTransformEffect::Draw(
+  const ComPtr<ID3D12Device3>& device,
+  const ComPtr<ID3D12GraphicsCommandList>& commandList,
+  const ComPtr<ID3D12Resource>& src, ID3D12Resource * dst,
+  RECT dirtyRects[], unsigned * nbDirtyRects)
 {
   UNREFERENCED_PARAMETER(dirtyRects);
   UNREFERENCED_PARAMETER(nbDirtyRects);
@@ -261,7 +305,7 @@ ComPtr<ID3D12Resource> CColorTransformEffect::Run(
       m_uploadPending = false;
   }
 
-  TransitionDst(commandList, D3D12_RESOURCE_STATE_COMMON,
+  TransitionDst(commandList, dst, D3D12_RESOURCE_STATE_COMMON,
     D3D12_RESOURCE_STATE_UNORDERED_ACCESS);
 
   CBV(device, 0, m_constBuffer.Get(), sizeof(m_consts));
@@ -275,10 +319,10 @@ ComPtr<ID3D12Resource> CColorTransformEffect::Run(
   device->CreateShaderResourceView(
     m_lutBuffer.Get(), &lutDesc, Handle(device, 2));
 
-  UAV(device, 3, m_dst.Get(), m_dstFormat);
+  UAV(device, 3, dst, m_dstFormat);
   Dispatch(commandList);
 
-  TransitionDst(commandList, D3D12_RESOURCE_STATE_UNORDERED_ACCESS,
+  TransitionDst(commandList, dst, D3D12_RESOURCE_STATE_UNORDERED_ACCESS,
     D3D12_RESOURCE_STATE_COMMON);
-  return m_dst;
+  return true;
 }

idd/LGIdd/postprocess/effect/CColorTransformEffect.h

@@ -51,6 +51,13 @@ private:
   CalPart                m_part;
   bool                   m_keepSignal;
 
+  PostProcessStatus Set(const ComPtr<ID3D12Device3>& device,
+    const D12FrameFormat& src, D12FrameFormat& dst, bool own);
+  bool Draw(const ComPtr<ID3D12Device3>& device,
+    const ComPtr<ID3D12GraphicsCommandList>& commandList,
+    const ComPtr<ID3D12Resource>& src, ID3D12Resource * dst,
+    RECT dirtyRects[], unsigned * nbDirtyRects);
+
 public:
   explicit CColorTransformEffect(CalPart part = CalPart::ALL,
     bool keepSignal = false) :
@@ -62,9 +69,17 @@ public:
 
   PostProcessStatus SetFormat(const ComPtr<ID3D12Device3>& device,
     const D12FrameFormat& src, D12FrameFormat& dst) override;
+  // Configures shader state without allocating the legacy-owned output.
+  PostProcessStatus Cfg(const ComPtr<ID3D12Device3>& device,
+    const D12FrameFormat& src, D12FrameFormat& dst);
 
   ComPtr<ID3D12Resource> Run(const ComPtr<ID3D12Device3>& device,
     const ComPtr<ID3D12GraphicsCommandList>& commandList,
     const ComPtr<ID3D12Resource>& src, RECT dirtyRects[],
     unsigned * nbDirtyRects) override;
+  // dst must match Cfg's output and be in COMMON; Run restores COMMON.
+  bool Run(const ComPtr<ID3D12Device3>& device,
+    const ComPtr<ID3D12GraphicsCommandList>& commandList,
+    const ComPtr<ID3D12Resource>& src, ID3D12Resource * dst,
+    RECT dirtyRects[], unsigned * nbDirtyRects);
 };

idd/LGIdd/postprocess/effect/CComputeEffect.cpp

@@ -280,11 +280,27 @@ void CComputeEffect::UAV(const ComPtr<ID3D12Device3>& device, UINT index,
 void CComputeEffect::TransitionDst(
   const ComPtr<ID3D12GraphicsCommandList>& commandList,
   D3D12_RESOURCE_STATES before, D3D12_RESOURCE_STATES after)
+{
+  TransitionDst(commandList, m_dst.Get(), before, after);
+}
+
+bool CComputeEffect::IsDst(ID3D12Resource * dst) const
+{
+  if (!dst)
+    return false;
+
+  return D12::Same(dst->GetDesc(), m_outDesc);
+}
+
+void CComputeEffect::TransitionDst(
+  const ComPtr<ID3D12GraphicsCommandList>& commandList,
+  ID3D12Resource * dst, D3D12_RESOURCE_STATES before,
+  D3D12_RESOURCE_STATES after)
 {
   D3D12_RESOURCE_BARRIER barrier = {};
   barrier.Type  = D3D12_RESOURCE_BARRIER_TYPE_TRANSITION;
   barrier.Flags = D3D12_RESOURCE_BARRIER_FLAG_NONE;
-  barrier.Transition.pResource   = m_dst.Get();
+  barrier.Transition.pResource   = dst;
   barrier.Transition.StateBefore = before;
   barrier.Transition.StateAfter  = after;
   barrier.Transition.Subresource = D3D12_RESOURCE_BARRIER_ALL_SUBRESOURCES;

idd/LGIdd/postprocess/effect/CComputeEffect.h

@@ -61,6 +61,7 @@ protected:
   ComPtr<ID3D12PipelineState>  m_pso;
   ComPtr<ID3D12DescriptorHeap> m_descHeap;
   ComPtr<ID3D12Resource>       m_dst;
+  D3D12_RESOURCE_DESC          m_outDesc = {};
   unsigned                     m_threadsX = 0;
   unsigned                     m_threadsY = 0;
 
@@ -81,6 +82,11 @@ protected:
   void UAV(const ComPtr<ID3D12Device3>& device, UINT index,
     ID3D12Resource * resource, DXGI_FORMAT format) const;
 
+  bool IsDst(ID3D12Resource * dst) const;
+
   void TransitionDst(const ComPtr<ID3D12GraphicsCommandList>& commandList,
     D3D12_RESOURCE_STATES before, D3D12_RESOURCE_STATES after);
+  void TransitionDst(const ComPtr<ID3D12GraphicsCommandList>& commandList,
+    ID3D12Resource * dst, D3D12_RESOURCE_STATES before,
+    D3D12_RESOURCE_STATES after);
 };

idd/LGIdd/postprocess/effect/CDownsampleEffect.cpp

@@ -156,6 +156,20 @@ bool CDownsampleEffect::Init(const ComPtr<ID3D12Device3>& device, bool report)
 PostProcessStatus CDownsampleEffect::SetFormat(
   const ComPtr<ID3D12Device3>& device,
   const D12FrameFormat& src, D12FrameFormat& dst)
+{
+  return Set(device, src, dst, true);
+}
+
+PostProcessStatus CDownsampleEffect::Cfg(
+  const ComPtr<ID3D12Device3>& device,
+  const D12FrameFormat& src, D12FrameFormat& dst)
+{
+  return Set(device, src, dst, false);
+}
+
+PostProcessStatus CDownsampleEffect::Set(
+  const ComPtr<ID3D12Device3>& device,
+  const D12FrameFormat& src, D12FrameFormat& dst, bool own)
 {
   unsigned targetX = m_targetX;
   unsigned targetY = m_targetY;
@@ -174,9 +188,12 @@ PostProcessStatus CDownsampleEffect::SetFormat(
   D3D12_RESOURCE_DESC desc = src.desc;
   desc.Width  = targetX;
   desc.Height = targetY;
-  desc.Flags  = D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS;
+  desc.Flags  = own ? D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS :
+    dst.desc.Flags;
+  if (!(desc.Flags & D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS))
+    return PostProcessStatus::FAILED;
 
-  if (!CreateDefaultTexture(device, desc, m_dst))
+  if (own && !CreateDefaultTexture(device, desc, m_dst))
     return PostProcessStatus::FAILED;
 
   m_consts.width  = (float)targetX;
@@ -190,6 +207,7 @@ PostProcessStatus CDownsampleEffect::SetFormat(
   }
   m_threadsX = Groups((unsigned)desc.Width);
   m_threadsY = Groups(desc.Height);
+  m_outDesc  = desc;
   m_format   = src.desc.Format;
   m_scaleX   = (double)desc.Width  / src.desc.Width;
   m_scaleY   = (double)desc.Height / src.desc.Height;
@@ -225,19 +243,43 @@ ComPtr<ID3D12Resource> CDownsampleEffect::Run(
   const ComPtr<ID3D12GraphicsCommandList>& commandList,
   const ComPtr<ID3D12Resource>& src, RECT dirtyRects[],
   unsigned * nbDirtyRects)
+{
+  if (!m_dst || !Draw(device, commandList, src, m_dst.Get(),
+      dirtyRects, nbDirtyRects))
+    return nullptr;
+  return m_dst;
+}
+
+bool CDownsampleEffect::Run(
+  const ComPtr<ID3D12Device3>& device,
+  const ComPtr<ID3D12GraphicsCommandList>& commandList,
+  const ComPtr<ID3D12Resource>& src, ID3D12Resource * dst,
+  RECT dirtyRects[], unsigned * nbDirtyRects)
+{
+  if (!device || !commandList || !src || src.Get() == dst || !IsDst(dst))
+    return false;
+  return Draw(device, commandList, src, dst,
+    dirtyRects, nbDirtyRects);
+}
+
+bool CDownsampleEffect::Draw(
+  const ComPtr<ID3D12Device3>& device,
+  const ComPtr<ID3D12GraphicsCommandList>& commandList,
+  const ComPtr<ID3D12Resource>& src, ID3D12Resource * dst,
+  RECT dirtyRects[], unsigned * nbDirtyRects)
 {
   UNREFERENCED_PARAMETER(dirtyRects);
   UNREFERENCED_PARAMETER(nbDirtyRects);
 
-  TransitionDst(commandList, D3D12_RESOURCE_STATE_COMMON,
+  TransitionDst(commandList, dst, D3D12_RESOURCE_STATE_COMMON,
     D3D12_RESOURCE_STATE_UNORDERED_ACCESS);
 
   CBV(device, 0, m_constBuffer.Get(), sizeof(m_consts));
   SRV(device, 1, src.Get(), m_format);
-  UAV(device, 2, m_dst.Get(), m_format);
+  UAV(device, 2, dst, m_format);
   Dispatch(commandList);
 
-  TransitionDst(commandList, D3D12_RESOURCE_STATE_UNORDERED_ACCESS,
+  TransitionDst(commandList, dst, D3D12_RESOURCE_STATE_UNORDERED_ACCESS,
     D3D12_RESOURCE_STATE_COMMON);
-  return m_dst;
+  return true;
 }

idd/LGIdd/postprocess/effect/CDownsampleEffect.h

@@ -55,6 +55,12 @@ private:
 
   bool ParseRules(const std::wstring& value, bool report);
   const Rule * MatchRule(unsigned width, unsigned height) const;
+  PostProcessStatus Set(const ComPtr<ID3D12Device3>& device,
+    const D12FrameFormat& src, D12FrameFormat& dst, bool own);
+  bool Draw(const ComPtr<ID3D12Device3>& device,
+    const ComPtr<ID3D12GraphicsCommandList>& commandList,
+    const ComPtr<ID3D12Resource>& src, ID3D12Resource * dst,
+    RECT dirtyRects[], unsigned * nbDirtyRects);
 
 public:
   CDownsampleEffect() = default;
@@ -67,6 +73,9 @@ public:
 
   PostProcessStatus SetFormat(const ComPtr<ID3D12Device3>& device,
     const D12FrameFormat& src, D12FrameFormat& dst) override;
+  // Configures shader state without allocating the legacy-owned output.
+  PostProcessStatus Cfg(const ComPtr<ID3D12Device3>& device,
+    const D12FrameFormat& src, D12FrameFormat& dst);
 
   void AdjustDamage(RECT dirtyRects[], unsigned * nbDirtyRects) override;
 
@@ -74,4 +83,9 @@ public:
     const ComPtr<ID3D12GraphicsCommandList>& commandList,
     const ComPtr<ID3D12Resource>& src, RECT dirtyRects[],
     unsigned * nbDirtyRects) override;
+  // dst must match Cfg's output and be in COMMON; Run restores COMMON.
+  bool Run(const ComPtr<ID3D12Device3>& device,
+    const ComPtr<ID3D12GraphicsCommandList>& commandList,
+    const ComPtr<ID3D12Resource>& src, ID3D12Resource * dst,
+    RECT dirtyRects[], unsigned * nbDirtyRects);
 };

idd/LGIdd/postprocess/effect/CFormatEffect.cpp

@@ -0,0 +1,164 @@
+/**
+ * Looking Glass
+ * Copyright © 2017-2026 The Looking Glass Authors
+ * https://looking-glass.io
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc., 59
+ * Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "CFormatEffect.h"
+
+#include "CDebug.h"
+
+using namespace PostProcessUtil;
+
+namespace
+{
+  bool IsSDR8(const D12FrameFormat& format)
+  {
+    if (format.hdr || format.hdrPQ)
+      return false;
+
+    switch (format.format)
+    {
+      case FRAME_TYPE_BGRA:
+        return format.desc.Format == DXGI_FORMAT_B8G8R8A8_UNORM;
+      case FRAME_TYPE_RGBA:
+        return format.desc.Format == DXGI_FORMAT_R8G8B8A8_UNORM;
+      default:
+        return false;
+    }
+  }
+}
+
+bool CFormatEffect::Init(const ComPtr<ID3D12Device3>& device)
+{
+  D3D12_DESCRIPTOR_RANGE ranges[] =
+  {
+    Range(D3D12_DESCRIPTOR_RANGE_TYPE_SRV, 0),
+    Range(D3D12_DESCRIPTOR_RANGE_TYPE_UAV, 0),
+  };
+
+  const char * shader =
+    "Texture2D<float4> src : register(t0);\n"
+    "RWTexture2D<float4> dst : register(u0);\n"
+    "[numthreads(" POST_PROCESS_THREADS_STR ", "
+      POST_PROCESS_THREADS_STR ", 1)]\n"
+    "void main(uint3 dt : SV_DispatchThreadID)\n"
+    "{\n"
+    "  dst[dt.xy] = src[dt.xy];\n"
+    "}\n";
+
+  return InitCompute(device, ranges, ARRAYSIZE(ranges), nullptr, 0, shader);
+}
+
+PostProcessStatus CFormatEffect::SetFormat(
+  const ComPtr<ID3D12Device3>& device,
+  const D12FrameFormat& src, D12FrameFormat& dst)
+{
+  return Cfg(device, src, dst);
+}
+
+PostProcessStatus CFormatEffect::Cfg(
+  const ComPtr<ID3D12Device3>& device,
+  const D12FrameFormat& src, const D12FrameFormat& dst)
+{
+  UNREFERENCED_PARAMETER(device);
+
+  if (src.desc.Dimension != D3D12_RESOURCE_DIMENSION_TEXTURE2D ||
+      dst.desc.Dimension != D3D12_RESOURCE_DIMENSION_TEXTURE2D ||
+      !src.desc.Width                                          ||
+      !src.desc.Height                                         ||
+      src.desc.Width     != dst.desc.Width                     ||
+      src.desc.Height    != dst.desc.Height                    ||
+      !IsSDR8(src)                                             ||
+      !IsSDR8(dst))
+  {
+    DEBUG_ERROR("Unsupported texture format conversion");
+    return PostProcessStatus::FAILED;
+  }
+
+  if (src.desc.Format == dst.desc.Format)
+    return PostProcessStatus::BYPASS_EFFECT;
+
+  if (!(dst.desc.Flags & D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS))
+  {
+    DEBUG_ERROR("Format conversion destination does not allow UAV access");
+    return PostProcessStatus::FAILED;
+  }
+
+  m_srcDesc   = src.desc;
+  m_outDesc   = dst.desc;
+  m_srcFormat = src.desc.Format;
+  m_dstFormat = dst.desc.Format;
+  m_threadsX  = Groups((unsigned)dst.desc.Width);
+  m_threadsY  = Groups(dst.desc.Height);
+  return PostProcessStatus::SUCCESS;
+}
+
+ComPtr<ID3D12Resource> CFormatEffect::Run(
+  const ComPtr<ID3D12Device3>& device,
+  const ComPtr<ID3D12GraphicsCommandList>& commandList,
+  const ComPtr<ID3D12Resource>& src, RECT dirtyRects[],
+  unsigned * nbDirtyRects)
+{
+  UNREFERENCED_PARAMETER(device);
+  UNREFERENCED_PARAMETER(commandList);
+  UNREFERENCED_PARAMETER(src);
+  UNREFERENCED_PARAMETER(dirtyRects);
+  UNREFERENCED_PARAMETER(nbDirtyRects);
+  return nullptr;
+}
+
+bool CFormatEffect::IsSrc(ID3D12Resource * src) const
+{
+  if (!src)
+    return false;
+
+  return D12::Same(src->GetDesc(), m_srcDesc, D12::DescCmp::VIEW);
+}
+
+bool CFormatEffect::Run(
+  const ComPtr<ID3D12Device3>& device,
+  const ComPtr<ID3D12GraphicsCommandList>& commandList,
+  const ComPtr<ID3D12Resource>& src, ID3D12Resource * dst,
+  RECT dirtyRects[], unsigned * nbDirtyRects)
+{
+  if (!device || !commandList || !IsSrc(src.Get()) ||
+      src.Get() == dst || !IsDst(dst))
+    return false;
+  return Draw(device, commandList, src, dst, dirtyRects, nbDirtyRects);
+}
+
+bool CFormatEffect::Draw(
+  const ComPtr<ID3D12Device3>& device,
+  const ComPtr<ID3D12GraphicsCommandList>& commandList,
+  const ComPtr<ID3D12Resource>& src, ID3D12Resource * dst,
+  RECT dirtyRects[], unsigned * nbDirtyRects)
+{
+  UNREFERENCED_PARAMETER(dirtyRects);
+  UNREFERENCED_PARAMETER(nbDirtyRects);
+
+  TransitionDst(commandList, dst, D3D12_RESOURCE_STATE_COMMON,
+    D3D12_RESOURCE_STATE_UNORDERED_ACCESS);
+
+  SRV(device, 0, src.Get(), m_srcFormat);
+  UAV(device, 1, dst, m_dstFormat);
+  Dispatch(commandList);
+
+  TransitionDst(commandList, dst, D3D12_RESOURCE_STATE_UNORDERED_ACCESS,
+    D3D12_RESOURCE_STATE_COMMON);
+  return true;
+}

idd/LGIdd/postprocess/effect/CFormatEffect.h

@@ -0,0 +1,57 @@
+/**
+ * Looking Glass
+ * Copyright © 2017-2026 The Looking Glass Authors
+ * https://looking-glass.io
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc., 59
+ * Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#pragma once
+
+#include "CComputeEffect.h"
+
+class CFormatEffect : public CComputeEffect
+{
+private:
+  D3D12_RESOURCE_DESC m_srcDesc   = {};
+  DXGI_FORMAT         m_srcFormat = DXGI_FORMAT_UNKNOWN;
+  DXGI_FORMAT         m_dstFormat = DXGI_FORMAT_UNKNOWN;
+
+  bool IsSrc(ID3D12Resource * src) const;
+  bool Draw(const ComPtr<ID3D12Device3>& device,
+    const ComPtr<ID3D12GraphicsCommandList>& commandList,
+    const ComPtr<ID3D12Resource>& src, ID3D12Resource * dst,
+    RECT dirtyRects[], unsigned * nbDirtyRects);
+
+public:
+  const char * GetName() const override { return "Format"; }
+
+  bool Init(const ComPtr<ID3D12Device3>& device);
+
+  PostProcessStatus SetFormat(const ComPtr<ID3D12Device3>& device,
+    const D12FrameFormat& src, D12FrameFormat& dst) override;
+  PostProcessStatus Cfg(const ComPtr<ID3D12Device3>& device,
+    const D12FrameFormat& src, const D12FrameFormat& dst);
+
+  ComPtr<ID3D12Resource> Run(const ComPtr<ID3D12Device3>& device,
+    const ComPtr<ID3D12GraphicsCommandList>& commandList,
+    const ComPtr<ID3D12Resource>& src, RECT dirtyRects[],
+    unsigned * nbDirtyRects) override;
+  // dst must match Cfg's output and be in COMMON; Run restores COMMON.
+  bool Run(const ComPtr<ID3D12Device3>& device,
+    const ComPtr<ID3D12GraphicsCommandList>& commandList,
+    const ComPtr<ID3D12Resource>& src, ID3D12Resource * dst,
+    RECT dirtyRects[], unsigned * nbDirtyRects);
+};

idd/LGIdd/postprocess/effect/CHDR16to10Effect.cpp

@@ -87,17 +87,35 @@ bool CHDR16to10Effect::Init(const ComPtr<ID3D12Device3>& device)
 PostProcessStatus CHDR16to10Effect::SetFormat(
   const ComPtr<ID3D12Device3>& device,
   const D12FrameFormat& src, D12FrameFormat& dst)
+{
+  return Set(device, src, dst, true);
+}
+
+PostProcessStatus CHDR16to10Effect::Cfg(
+  const ComPtr<ID3D12Device3>& device,
+  const D12FrameFormat& src, D12FrameFormat& dst)
+{
+  return Set(device, src, dst, false);
+}
+
+PostProcessStatus CHDR16to10Effect::Set(
+  const ComPtr<ID3D12Device3>& device,
+  const D12FrameFormat& src, D12FrameFormat& dst, bool own)
 {
   if (src.desc.Format != DXGI_FORMAT_R16G16B16A16_FLOAT || !src.hdr)
     return PostProcessStatus::BYPASS_EFFECT;
 
   D3D12_RESOURCE_DESC desc = src.desc;
   desc.Format = DXGI_FORMAT_R10G10B10A2_UNORM;
-  desc.Flags  = D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS;
+  desc.Flags  = own ? D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS :
-
+    dst.desc.Flags;
-  if (!CreateDefaultTexture(device, desc, m_dst))
+  if (!(desc.Flags & D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS))
     return PostProcessStatus::FAILED;
 
+  if (own && !CreateDefaultTexture(device, desc, m_dst))
+    return PostProcessStatus::FAILED;
+
+  m_outDesc  = desc;
   m_threadsX = Groups((unsigned)desc.Width);
   m_threadsY = Groups(desc.Height);
 
@@ -118,19 +136,43 @@ ComPtr<ID3D12Resource> CHDR16to10Effect::Run(
   const ComPtr<ID3D12GraphicsCommandList>& commandList,
   const ComPtr<ID3D12Resource>& src, RECT dirtyRects[],
   unsigned * nbDirtyRects)
+{
+  if (!m_dst || !Draw(device, commandList, src, m_dst.Get(),
+      dirtyRects, nbDirtyRects))
+    return nullptr;
+  return m_dst;
+}
+
+bool CHDR16to10Effect::Run(
+  const ComPtr<ID3D12Device3>& device,
+  const ComPtr<ID3D12GraphicsCommandList>& commandList,
+  const ComPtr<ID3D12Resource>& src, ID3D12Resource * dst,
+  RECT dirtyRects[], unsigned * nbDirtyRects)
+{
+  if (!device || !commandList || !src || src.Get() == dst || !IsDst(dst))
+    return false;
+  return Draw(device, commandList, src, dst,
+    dirtyRects, nbDirtyRects);
+}
+
+bool CHDR16to10Effect::Draw(
+  const ComPtr<ID3D12Device3>& device,
+  const ComPtr<ID3D12GraphicsCommandList>& commandList,
+  const ComPtr<ID3D12Resource>& src, ID3D12Resource * dst,
+  RECT dirtyRects[], unsigned * nbDirtyRects)
 {
   UNREFERENCED_PARAMETER(dirtyRects);
   UNREFERENCED_PARAMETER(nbDirtyRects);
 
-  TransitionDst(commandList, D3D12_RESOURCE_STATE_COMMON,
+  TransitionDst(commandList, dst, D3D12_RESOURCE_STATE_COMMON,
     D3D12_RESOURCE_STATE_UNORDERED_ACCESS);
 
   CBV(device, 0, m_constBuffer.Get(), sizeof(m_consts));
   SRV(device, 1, src.Get(), DXGI_FORMAT_R16G16B16A16_FLOAT);
-  UAV(device, 2, m_dst.Get(), DXGI_FORMAT_R10G10B10A2_UNORM);
+  UAV(device, 2, dst, DXGI_FORMAT_R10G10B10A2_UNORM);
   Dispatch(commandList);
 
-  TransitionDst(commandList, D3D12_RESOURCE_STATE_UNORDERED_ACCESS,
+  TransitionDst(commandList, dst, D3D12_RESOURCE_STATE_UNORDERED_ACCESS,
     D3D12_RESOURCE_STATE_COMMON);
-  return m_dst;
+  return true;
 }

idd/LGIdd/postprocess/effect/CHDR16to10Effect.h

@@ -31,6 +31,13 @@ private:
   } m_consts = { 80.0f };
   ComPtr<ID3D12Resource> m_constBuffer;
 
+  PostProcessStatus Set(const ComPtr<ID3D12Device3>& device,
+    const D12FrameFormat& src, D12FrameFormat& dst, bool own);
+  bool Draw(const ComPtr<ID3D12Device3>& device,
+    const ComPtr<ID3D12GraphicsCommandList>& commandList,
+    const ComPtr<ID3D12Resource>& src, ID3D12Resource * dst,
+    RECT dirtyRects[], unsigned * nbDirtyRects);
+
 public:
   const char * GetName() const override { return "HDR16to10"; }
 
@@ -38,9 +45,17 @@ public:
 
   PostProcessStatus SetFormat(const ComPtr<ID3D12Device3>& device,
     const D12FrameFormat& src, D12FrameFormat& dst) override;
+  // Configures shader state without allocating the legacy-owned output.
+  PostProcessStatus Cfg(const ComPtr<ID3D12Device3>& device,
+    const D12FrameFormat& src, D12FrameFormat& dst);
 
   ComPtr<ID3D12Resource> Run(const ComPtr<ID3D12Device3>& device,
     const ComPtr<ID3D12GraphicsCommandList>& commandList,
     const ComPtr<ID3D12Resource>& src, RECT dirtyRects[],
     unsigned * nbDirtyRects) override;
+  // dst must match Cfg's output and be in COMMON; Run restores COMMON.
+  bool Run(const ComPtr<ID3D12Device3>& device,
+    const ComPtr<ID3D12GraphicsCommandList>& commandList,
+    const ComPtr<ID3D12Resource>& src, ID3D12Resource * dst,
+    RECT dirtyRects[], unsigned * nbDirtyRects);
 };

idd/LGIdd/transport/CTexHub.cpp

@@ -490,6 +490,24 @@ void CTexHub::Abort(CTexStage& stage) noexcept
   drop.reset();
 }
 
+void CTexHub::Fault(
+  const FrameIn& frame, PushResult result) noexcept
+{
+  if (result != PushResult::REJECTED && result != PushResult::FAILED)
+    return;
+
+  std::shared_ptr<CTexSet> set;
+  unsigned index;
+  ITexSink * sink = nullptr;
+  if (!Enter(frame, true, set, index, sink))
+  {
+    if (set)
+      Leave(set, TRANSPORT_MAX_INSTANCES);
+    return;
+  }
+  Finish(set, index, result);
+}
+
 PushResult CTexHub::Push(FrameIn frame, TexLease lease) noexcept
 {
   std::shared_ptr<CTexSet> set;

idd/LGIdd/transport/CTexHub.h

@@ -102,7 +102,6 @@ private:
 
   static bool Match(const FaultRec& fault, BackendId id, uint32_t epoch,
     const FrameCfg& cfg, bool anyCfg = false);
-
   bool Enter(const FrameIn& frame, bool lease,
     std::shared_ptr<CTexSet>& set, unsigned& route, ITexSink *& sink);
   void Finish(const std::shared_ptr<CTexSet>& set, unsigned route,
@@ -135,6 +134,7 @@ private:
   void Stop();
 
 public:
+  void Fault(const FrameIn& frame, PushResult result) noexcept;
   PushResult Push(FrameIn frame, TexLease lease) noexcept;
   PushResult Push(FrameIn frame, D11Lease lease) noexcept;
 };

idd/LGIdd/transport/CTransportManager.cpp

@@ -1254,7 +1254,7 @@ CfgResult CTransportManager::Cfg(const GraphCfg& cfg,
           break;
 
         if (!next.Add(route.id, route.epoch, route.required,
-              route.primary, candidate))
+              route.primary, route.texSink != nullptr, candidate))
         {
           route.transport->Abort();
           routeResult = CfgResult::FAILED;