ViewerInstance: do not take write lock at each render

NatronGitHub · Mar 21, 2018 · e897d30 · e897d30
1 parent 02ea16a
commit e897d30
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Showing 2 changed files with 6 additions and 1 deletion.
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -10,7 +10,7 @@
 - Fix crash when Viewer/maxNodeUiOpened=1 in the preferences
 - Fix bug where an exported PyPlug would not have a correct Python syntax if a string had a backslash followed by newline (as may be seen in Shadertoy sources).
 - Fix behaviour of loop/bounce in the Read node when there is a time offset #1734.
-- G'MIC plugins by Tobias Fleischer are now bundled with the binary distributions.
+- G'MIC plugins by Tobias Fleischer are now bundled with the binary distributions (beta).
 - Fix bug where the "&" character was not displayed in the plugin creation menus.
 
 

diff --git a/Engine/ViewerInstance.cpp b/Engine/ViewerInstance.cpp
@@ -945,7 +945,12 @@ ViewerInstance::setupMinimalUpdateViewerParams(const SequenceTime time,
     }
 
     // Fill the gamma LUT if it has never been filled yet
+    bool gammaLookupEmpty;
     {
+        QReadLocker k(&_imp->gammaLookupMutex);
+        gammaLookupEmpty = _imp->gammaLookup.empty();
+    }
+    if (gammaLookupEmpty) {
         QWriteLocker k(&_imp->gammaLookupMutex);
         if ( _imp->gammaLookup.empty() ) {
             _imp->fillGammaLut(outArgs->params->gamma);