Module: wine Branch: master Commit: 0ee74e9f815fbab8ef61eac724ba311b9f775b60 URL: https://gitlab.winehq.org/wine/wine/-/commit/0ee74e9f815fbab8ef61eac724ba311...
Author: Zebediah Figura zfigura@codeweavers.com Date: Tue Jul 26 18:28:42 2022 -0500
d3d9: Cache the output mode list.
Garou: Mark of the Wolves calls IDirect3D9::GetAdapterModeCount() on every frame. This results in calling EnumDisplaySettingsExW() once per available mode, which is a very slow operation, both on Windows and Wine.
Manual testing shows that Windows caches the mode list (as well as the adapter list, which is already cached in Wine) in Direct3D 9 and lower. Calls to GetAdapterModeCount() and EnumAdapterDisplayModes() are fast, and they also do not change if monitors are added or removed.
DXGI behaves differently, however. The list of outputs attached to an adapter is cached—that is, calls to IDXGIAdapter::EnumOutputs() are fast, and return stale data. However, at least some other calls are slow and do not seem to be cached, including IDXGIOutput::GetDisplayModeList() and IDXGIOutput::GetDesc().
ddraw is also slow and uncached. Since all testing was done on Windows 10 (for lack of available older hardware to test with) it is not unlikely that ddraw was reimplemented over dxgi on newer Windows, and that older Windows versions would be fast and cached, but this is speculation. In any case I have not included patches to cache ddraw modes.
Tests were done on Windows 10 21H2, both on real hardware with NVidia drivers and on software drivers via qemu/KVM. In the latter case only speed could be tested, but this was consistent with the results from the NVidia machine.
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dlls/d3d8/directx.c | 4 ++-- dlls/d3d9/directx.c | 11 +++++------ dlls/ddraw/ddraw.c | 2 +- dlls/dxgi/output.c | 4 ++-- dlls/wined3d/directx.c | 21 +++++++++++++-------- dlls/wined3d/wined3d.spec | 4 ++-- dlls/wined3d/wined3d_private.h | 1 + include/wine/wined3d.h | 4 ++-- 8 files changed, 28 insertions(+), 23 deletions(-)