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Fix longstanding bug with the FPU being forced into single-precision mode on Windows

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rdb 2010-01-31 08:48:41 +00:00
parent 312944e2f7
commit b2b32aea5b
1 changed files with 2 additions and 0 deletions
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panda/src/windisplay/winDetectDx.h
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@ -538,6 +538,8 @@ static int get_display_information (DisplaySearchParameters &display_search_para
else { else {
behavior_flags = D3DCREATE_SOFTWARE_VERTEXPROCESSING; behavior_flags = D3DCREATE_SOFTWARE_VERTEXPROCESSING;
} }
// This is important to prevent DirectX from forcing the FPU into single-precision mode.
behavior_flags |= D3DCREATE_FPU_PRESERVE;
HRESULT result; HRESULT result;