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Always allocate at least 2048 slots for pixel history

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* This means that any 'degenerate' cases of only one event or so on will
  still have enough slots to be able to handle reasonable amount of
  overdraw. The only case that will fail is if every event has loads of
  hits, but on average there should be enough slots allocated.
This commit is contained in:
baldurk
2017-01-11 17:23:39 +00:00
parent 6358517ac2
commit 9077203f71
1 changed files with 7 additions and 2 deletions
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renderdoc/driver/d3d11/d3d11_analyse.cpp
+7 -2
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@@ -4759,9 +4759,14 @@ vector<PixelModification> D3D11DebugManager::PixelHistory(vector<EventUsage> eve
details.texFmt == DXGI_FORMAT_D32_FLOAT_S8X24_UINT)
details.texFmt = DXGI_FORMAT_R32G32B32A32_UINT;
// define a texture that we can copy before/after results into
// define a texture that we can copy before/after results into.
// We always allocate at least 2048 slots, to allow for pixel history that only touches a couple
// of events still being able to overdraw many times. The idea being that if we're taking the
// history over many events, then the events which don't take up any slots or only one will mostly
// dominate over those that take more than the average. If we only have one or two candidate
// events then at least 2048 slots gives a huge amount of potential overdraw.
D3D11_TEXTURE2D_DESC pixstoreDesc = {
RDCMIN(2048U, AlignUp16(pixstoreSlots)),
2048U,
RDCMAX(1U, (pixstoreSlots / 2048) + 1),
1U,
1U,