tdf#38835: strip out non-trivial globals before main

Allocate the fixed texture vector on first use instead of before main. This
should make startup very, very slightly faster.

Tested by just starting up a writer document. Let me know if there are other
tests I should be doing.

Change-Id: Iaf752327b86c131a0241786485b30030a4f987c4
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/93939
Tested-by: Jenkins
Reviewed-by: Luboš Luňák <l.lunak@collabora.com>

1 files changed, 12 insertions, 14 deletions

diff --git a/vcl/opengl/salbmp.cxx b/vcl/opengl/salbmp.cxx
index 4c8261858023..abb9731b6d45 100644
--- a/vcl/opengl/salbmp.cxx
+++ b/vcl/opengl/salbmp.cxx
@@ -91,10 +91,6 @@ sal_uInt32 lclBytesPerRow(sal_uInt16 nBits, int nWidth)
     }
     return 0;
 }
-
-typedef std::vector<std::unique_ptr< FixedTextureAtlasManager > > TextureAtlasVector;
-static vcl::DeleteOnDeinit< TextureAtlasVector > gTextureAtlases(new TextureAtlasVector);
-
 }
 
 OpenGLSalBitmap::OpenGLSalBitmap()
@@ -313,16 +309,18 @@ void lclInstantiateTexture(OpenGLTexture& rTexture, const int nWidth, const int
 {
     if (nWidth == nHeight)
     {
-        TextureAtlasVector &sTextureAtlases = *gTextureAtlases.get();
-        if (sTextureAtlases.empty())
-        {
-            sTextureAtlases.push_back(std::make_unique<FixedTextureAtlasManager>(8, 8, 16));
-            sTextureAtlases.push_back(std::make_unique<FixedTextureAtlasManager>(8, 8, 24));
-            sTextureAtlases.push_back(std::make_unique<FixedTextureAtlasManager>(8, 8, 32));
-            sTextureAtlases.push_back(std::make_unique<FixedTextureAtlasManager>(8, 8, 48));
-            sTextureAtlases.push_back(std::make_unique<FixedTextureAtlasManager>(8, 8, 64));
-        }
-        for (std::unique_ptr<FixedTextureAtlasManager> & pTextureAtlas : sTextureAtlases)
+        typedef std::vector<std::unique_ptr<FixedTextureAtlasManager>> TextureAtlasVector;
+        static vcl::DeleteOnDeinit<TextureAtlasVector> aTextureAtlases([]() {
+            TextureAtlasVector* p = new TextureAtlasVector;
+            p->reserve(5);
+            p->push_back(std::make_unique<FixedTextureAtlasManager>(8, 8, 16));
+            p->push_back(std::make_unique<FixedTextureAtlasManager>(8, 8, 24));
+            p->push_back(std::make_unique<FixedTextureAtlasManager>(8, 8, 32));
+            p->push_back(std::make_unique<FixedTextureAtlasManager>(8, 8, 48));
+            p->push_back(std::make_unique<FixedTextureAtlasManager>(8, 8, 64));
+            return p;
+        }());
+        for (std::unique_ptr<FixedTextureAtlasManager>& pTextureAtlas : *aTextureAtlases.get())
         {
             if (nWidth == pTextureAtlas->GetSubtextureSize())
             {