tdf#144289 invert / disable default OpenGL support

... and as a result drop setting a default in SalSvpInstance.

This is also more consistent: now you must explicitly implement
CreateOpenGLContext() and set "m_bSupportsOpenGL = true".

Change-Id: I591580bf134907213b8308e0843c278d2f470ed3
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/121632
Tested-by: Jenkins
Reviewed-by: Jan-Marek Glogowski <glogow@fbihome.de>
(cherry picked from commit 50238bddf0e95169007cb90479cca86849a19007)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/121635
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>

7 files changed, 8 insertions, 5 deletions

diff --git a/vcl/headless/svpinst.cxx b/vcl/headless/svpinst.cxx
index 71efed967af3..b9e93d6782c7 100644
--- a/vcl/headless/svpinst.cxx
+++ b/vcl/headless/svpinst.cxx
@@ -86,8 +86,6 @@ SvpSalInstance::SvpSalInstance( std::unique_ptr<SalYieldMutex> pMutex )
 #if !defined(ANDROID) && !defined(IOS)
     pthread_atfork(nullptr, nullptr, atfork_child);
 #endif
-
-    m_bSupportsOpenGL = false;
 }
 
 SvpSalInstance::~SvpSalInstance()
diff --git a/vcl/inc/salinst.hxx b/vcl/inc/salinst.hxx
index 1c61dc029cc6..9694d30f4939 100644
--- a/vcl/inc/salinst.hxx
+++ b/vcl/inc/salinst.hxx
@@ -80,7 +80,7 @@ private:
 
 protected:
     bool m_bSupportsBitmap32 = false;
-    bool m_bSupportsOpenGL = true;
+    bool m_bSupportsOpenGL = false;
 
 public:
     SalInstance(std::unique_ptr<comphelper::SolarMutex> pMutex);
@@ -158,6 +158,7 @@ public:
     // may return NULL to disable session management, only used by X11 backend
     virtual std::unique_ptr<SalSession> CreateSalSession();
 
+    // also needs to set m_bSupportsOpenGL = true in your SalInstance implementation!
     virtual OpenGLContext*  CreateOpenGLContext();
 
     virtual weld::Builder* CreateBuilder(weld::Widget* pParent, const OUString& rUIRoot, const OUString& rUIFile);
diff --git a/vcl/osx/salinst.cxx b/vcl/osx/salinst.cxx
index 75aea4d5415a..10306ac4c6c3 100644
--- a/vcl/osx/salinst.cxx
+++ b/vcl/osx/salinst.cxx
@@ -350,6 +350,7 @@ AquaSalInstance::AquaSalInstance()
 
     ImplSVData* pSVData = ImplGetSVData();
     pSVData->maAppData.mxToolkitName = OUString("osx");
+    m_bSupportsOpenGL = true;
 }
 
 AquaSalInstance::~AquaSalInstance()
diff --git a/vcl/qt5/Qt5Instance.cxx b/vcl/qt5/Qt5Instance.cxx
index f1e34d2761b1..c1e82aa6a0d9 100644
--- a/vcl/qt5/Qt5Instance.cxx
+++ b/vcl/qt5/Qt5Instance.cxx
@@ -246,8 +246,8 @@ Qt5Instance::Qt5Instance(std::unique_ptr<QApplication>& pQApp, bool bUseCairo)
     connect(QGuiApplication::inputMethod(), &QInputMethod::localeChanged, this,
             &Qt5Instance::localeChanged);
 
-#ifdef EMSCRIPTEN
-    m_bSupportsOpenGL = false;
+#ifndef EMSCRIPTEN
+    m_bSupportsOpenGL = true;
 #endif
 }
 
diff --git a/vcl/unx/generic/app/salinst.cxx b/vcl/unx/generic/app/salinst.cxx
index ad81916a5894..0df3b9b5c0e5 100644
--- a/vcl/unx/generic/app/salinst.cxx
+++ b/vcl/unx/generic/app/salinst.cxx
@@ -72,6 +72,7 @@ X11SalInstance::X11SalInstance(std::unique_ptr<SalYieldMutex> pMutex)
 {
     ImplSVData* pSVData = ImplGetSVData();
     pSVData->maAppData.mxToolkitName = OUString("x11");
+    m_bSupportsOpenGL = true;
 #if HAVE_FEATURE_SKIA
     X11SkiaSalGraphicsImpl::prepareSkia();
 #if SKIA_USE_BITMAP32
diff --git a/vcl/unx/gtk3/gtkinst.cxx b/vcl/unx/gtk3/gtkinst.cxx
index c4a516ca5d41..9fccb99779b6 100644
--- a/vcl/unx/gtk3/gtkinst.cxx
+++ b/vcl/unx/gtk3/gtkinst.cxx
@@ -211,6 +211,7 @@ GtkInstance::GtkInstance( std::unique_ptr<SalYieldMutex> pMutex )
     , bNeedsInit(true)
     , m_pLastCairoFontOptions(nullptr)
 {
+    m_bSupportsOpenGL = true;
 }
 
 //We want to defer initializing gtk until we are after uno has been
diff --git a/vcl/win/app/salinst.cxx b/vcl/win/app/salinst.cxx
index f2981bbd9d1c..dd35317040d4 100644
--- a/vcl/win/app/salinst.cxx
+++ b/vcl/win/app/salinst.cxx
@@ -384,6 +384,7 @@ WinSalInstance::WinSalInstance()
 {
     ImplSVData* pSVData = ImplGetSVData();
     pSVData->maAppData.mxToolkitName = OUString("win");
+    m_bSupportsOpenGL = true;
 #if HAVE_FEATURE_SKIA
     WinSkiaSalGraphicsImpl::prepareSkia();
 #if SKIA_USE_BITMAP32