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

2010-01-31 08:48:41 +00:00 · 2010-01-31 08:48:41 +00:00 · b2b32aea5b
parent 312944e2f7
commit b2b32aea5b
1 changed files with 2 additions and 0 deletions
--- a/panda/src/windisplay/winDetectDx.h
+++ b/panda/src/windisplay/winDetectDx.h
@ -538,6 +538,8 @@ static int get_display_information (DisplaySearchParameters &display_search_para
          else {
            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;