Fix #824/SNOW-466: Window Creation Error related to FSAA

- Linux only: Retry window creation with lower FSAA samples if it
fails.
- All platforms: save actual FSAA level into RenderFSAASamples after
window is created.

This exapnds on the patch from SNOW-466 by Robin Cornelius.

1 files changed, 7 insertions, 0 deletions

diff --git a/linden/indra/newview/llviewerwindow.cpp b/linden/indra/newview/llviewerwindow.cpp
index 57580cf..e6b207b 100644
--- a/linden/indra/newview/llviewerwindow.cpp
+++ b/linden/indra/newview/llviewerwindow.cpp
@@ -1278,6 +1278,13 @@ LLViewerWindow::LLViewerWindow(
         LLAppViewer::instance()->forceExit(1);
         }
         
+        const U32 real_fsaa = mWindow->getFSAASamples();
+        if (real_fsaa != gSavedSettings.getU32("RenderFSAASamples"))
+        {
+                LL_WARNS("Window") << "Window created with reduced anti-aliasing samples: " << real_fsaa << "x FSAA." << LL_ENDL;
+                gSavedSettings.setU32("RenderFSAASamples", real_fsaa);
+        }
+
         // Get the real window rect the window was created with (since there are various OS-dependent reasons why
         // the size of a window or fullscreen context may have been adjusted slightly...)
         F32 ui_scale_factor = gSavedSettings.getF32("UIScaleFactor");