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popn: fix subscreen redraw option causing graphical glitches (#854)

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## Link to GitHub Issue or related Pull Request, if one exists
#0

## Description of change
Old behavior: Forced redraw presented the subscreen every main frame,
even when the game already presented it, causing duplicate presents and
tearing in popn (was fine in sdvx)

New behavior: Forced redraw acts as a fallback, presenting only when the
game skips or fails a subscreen update.

## Testing
Popn - no more glitching
Nabla - no regression
This commit is contained in:
bicarus
2026-08-06 04:14:31 -07:00
committed by GitHub
parent 4959a58de3
commit b53447bed5
6 changed files with 55 additions and 3 deletions
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src/spice2x/hooks/graphics/backends/d3d9/d3d9_device.h
+1
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@@ -262,6 +262,7 @@ struct WrappedIDirect3DDevice9 : IDirect3DDevice9Ex {
std::atomic_ulong refs = 1;
WrappedIDirect3DSwapChain9 *main_swapchain = nullptr;
WrappedIDirect3DSwapChain9 *implicit_sub_swapchain = nullptr;
WrappedIDirect3DSwapChain9 *sub_swapchain[3] = { nullptr, nullptr, nullptr };
FakeIDirect3DSwapChain9 *fake_sub_swapchain[3] = { nullptr, nullptr, nullptr };