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-rw-r--r--vcl/inc/opengl/salbmp.hxx4
-rw-r--r--vcl/inc/opengl/win/gdiimpl.hxx7
-rw-r--r--vcl/inc/opengl/x11/gdiimpl.hxx4
-rw-r--r--vcl/inc/openglgdiimpl.hxx10
-rw-r--r--vcl/inc/salgdi.hxx2
-rw-r--r--vcl/opengl/gdiimpl.cxx47
-rw-r--r--vcl/opengl/salbmp.cxx16
-rw-r--r--vcl/opengl/texture.cxx6
-rw-r--r--vcl/opengl/win/gdiimpl.cxx10
-rw-r--r--vcl/opengl/x11/gdiimpl.cxx10
-rw-r--r--vcl/source/app/svdata.cxx12
-rw-r--r--vcl/source/gdi/salgdilayout.cxx2
-rw-r--r--vcl/source/opengl/OpenGLContext.cxx48
-rw-r--r--vcl/unx/generic/window/salframe.cxx4
-rw-r--r--vcl/workben/vcldemo.cxx10
15 files changed, 71 insertions, 121 deletions
diff --git a/vcl/inc/opengl/salbmp.hxx b/vcl/inc/opengl/salbmp.hxx
index f189ea8bc204..1c425dae488b 100644
--- a/vcl/inc/opengl/salbmp.hxx
+++ b/vcl/inc/opengl/salbmp.hxx
@@ -39,7 +39,7 @@ class BitmapPalette;
class VCL_PLUGIN_PUBLIC OpenGLSalBitmap : public SalBitmap
{
private:
- OpenGLContext* mpContext;
+ rtl::Reference<OpenGLContext> mpContext;
OpenGLTexture maTexture;
bool mbDirtyTexture;
BitmapPalette maPalette;
@@ -89,7 +89,7 @@ public:
bool Create( const OpenGLTexture& rTex, long nX, long nY, long nWidth, long nHeight );
OpenGLTexture& GetTexture() const;
- static OpenGLContext* GetBitmapContext();
+ static rtl::Reference<OpenGLContext> GetBitmapContext();
private:
diff --git a/vcl/inc/opengl/win/gdiimpl.hxx b/vcl/inc/opengl/win/gdiimpl.hxx
index e1fa195286a6..04bb15194de6 100644
--- a/vcl/inc/opengl/win/gdiimpl.hxx
+++ b/vcl/inc/opengl/win/gdiimpl.hxx
@@ -14,8 +14,7 @@
#include "openglgdiimpl.hxx"
#include "win/salgdi.h"
-
-class OpenGLContext;
+#include <vcl/opengl/OpenGLContext.hxx>
class WinOpenGLSalGraphicsImpl : public OpenGLSalGraphicsImpl
{
@@ -31,8 +30,8 @@ public:
SalGeometryProvider *mpProvider);
protected:
- virtual OpenGLContext* CreateWinContext() SAL_OVERRIDE;
- virtual bool UseContext( OpenGLContext* pContext ) SAL_OVERRIDE;
+ virtual rtl::Reference<OpenGLContext> CreateWinContext() SAL_OVERRIDE;
+ virtual bool UseContext( const rtl::Reference<OpenGLContext> &pContext ) SAL_OVERRIDE;
public:
virtual void copyBits( const SalTwoRect& rPosAry, SalGraphics* pSrcGraphics ) SAL_OVERRIDE;
diff --git a/vcl/inc/opengl/x11/gdiimpl.hxx b/vcl/inc/opengl/x11/gdiimpl.hxx
index a87a9dec2de2..19804a8aff17 100644
--- a/vcl/inc/opengl/x11/gdiimpl.hxx
+++ b/vcl/inc/opengl/x11/gdiimpl.hxx
@@ -28,8 +28,8 @@ public:
virtual ~X11OpenGLSalGraphicsImpl();
protected:
- virtual OpenGLContext* CreateWinContext() SAL_OVERRIDE;
- virtual bool UseContext( OpenGLContext* pContext ) SAL_OVERRIDE;
+ virtual rtl::Reference<OpenGLContext> CreateWinContext() SAL_OVERRIDE;
+ virtual bool UseContext( const rtl::Reference<OpenGLContext> &pContext ) SAL_OVERRIDE;
bool RenderPixmap(X11Pixmap* pPixmap, X11Pixmap* pMask, int nX, int nY, TextureCombo& rCombo);
diff --git a/vcl/inc/openglgdiimpl.hxx b/vcl/inc/openglgdiimpl.hxx
index 62a51e1b6df1..71a9e803c8da 100644
--- a/vcl/inc/openglgdiimpl.hxx
+++ b/vcl/inc/openglgdiimpl.hxx
@@ -52,7 +52,7 @@ class VCL_DLLPUBLIC OpenGLSalGraphicsImpl : public SalGraphicsImpl
friend class OpenGLTests;
protected:
- OpenGLContext* mpContext;
+ rtl::Reference<OpenGLContext> mpContext;
SalGraphics& mrParent;
/// Pointer to the SalFrame or SalVirtualDevice
SalGeometryProvider* mpProvider;
@@ -137,19 +137,19 @@ protected:
bool ReleaseContext();
// retrieve the default context for offscreen rendering
- static OpenGLContext* GetDefaultContext();
+ static rtl::Reference<OpenGLContext> GetDefaultContext();
// create a new context for window rendering
- virtual OpenGLContext* CreateWinContext() = 0;
+ virtual rtl::Reference<OpenGLContext> CreateWinContext() = 0;
// check whether the given context can be used by this instance
- virtual bool UseContext( OpenGLContext* pContext ) = 0;
+ virtual bool UseContext( const rtl::Reference<OpenGLContext> &pContext ) = 0;
public:
OpenGLSalGraphicsImpl(SalGraphics& pParent, SalGeometryProvider *pProvider);
virtual ~OpenGLSalGraphicsImpl ();
- OpenGLContext* GetOpenGLContext();
+ rtl::Reference<OpenGLContext> GetOpenGLContext();
virtual void Init() SAL_OVERRIDE;
diff --git a/vcl/inc/salgdi.hxx b/vcl/inc/salgdi.hxx
index 16864276e357..033404991e38 100644
--- a/vcl/inc/salgdi.hxx
+++ b/vcl/inc/salgdi.hxx
@@ -93,7 +93,7 @@ public:
virtual SalGraphicsImpl* GetImpl() const = 0;
/// Check that our mpImpl is OpenGL and return the context, otherwise NULL.
- OpenGLContext* GetOpenGLContext() const;
+ rtl::Reference<OpenGLContext> GetOpenGLContext() const;
void setAntiAliasB2DDraw(bool bNew) { m_bAntiAliasB2DDraw = bNew; }
bool getAntiAliasB2DDraw() const { return m_bAntiAliasB2DDraw; }
diff --git a/vcl/opengl/gdiimpl.cxx b/vcl/opengl/gdiimpl.cxx
index 9a2d72e447b2..54873479b991 100644
--- a/vcl/opengl/gdiimpl.cxx
+++ b/vcl/opengl/gdiimpl.cxx
@@ -61,14 +61,14 @@ OpenGLSalGraphicsImpl::~OpenGLSalGraphicsImpl()
ReleaseContext();
}
-OpenGLContext* OpenGLSalGraphicsImpl::GetOpenGLContext()
+rtl::Reference<OpenGLContext> OpenGLSalGraphicsImpl::GetOpenGLContext()
{
if( !AcquireContext() )
return NULL;
return mpContext;
}
-OpenGLContext* OpenGLSalGraphicsImpl::GetDefaultContext()
+rtl::Reference<OpenGLContext> OpenGLSalGraphicsImpl::GetDefaultContext()
{
return ImplGetDefaultWindow()->GetGraphics()->GetOpenGLContext();
}
@@ -77,19 +77,14 @@ bool OpenGLSalGraphicsImpl::AcquireContext( )
{
ImplSVData* pSVData = ImplGetSVData();
- if( mpContext )
+ if( mpContext.is() )
{
if( mpContext->isInitialized() )
return true;
-#ifdef DBG_UTIL
- mpContext->DeRef(this);
-#else
- mpContext->DeRef();
-#endif
+ mpContext.clear();
}
-
- OpenGLContext* pContext = pSVData->maGDIData.mpLastContext;
+ OpenGLContext *pContext = pSVData->maGDIData.mpLastContext;
while( pContext )
{
// check if this context can be used by this SalGraphicsImpl instance
@@ -99,31 +94,17 @@ bool OpenGLSalGraphicsImpl::AcquireContext( )
}
if( pContext )
- {
-#ifdef DBG_UTIL
- pContext->AddRef(this);
-#else
- pContext->AddRef();
-#endif
- }
+ mpContext = pContext;
else
- pContext = mbOffscreen ? GetDefaultContext() : CreateWinContext();
+ mpContext = mbOffscreen ? GetDefaultContext() : CreateWinContext();
- mpContext = pContext;
- return (mpContext != NULL);
+ return mpContext.is();
}
bool OpenGLSalGraphicsImpl::ReleaseContext()
{
- if( mpContext )
- {
-#ifdef DBG_UTIL
- mpContext->DeRef(this);
-#else
- mpContext->DeRef();
-#endif
- }
- mpContext = NULL;
+ mpContext.clear();
+
return true;
}
@@ -132,7 +113,7 @@ void OpenGLSalGraphicsImpl::Init()
mbOffscreen = IsOffscreen();
// check if we can simply re-use the same context
- if( mpContext )
+ if( mpContext.is() )
{
if( !UseContext( mpContext ) )
ReleaseContext();
@@ -143,7 +124,7 @@ void OpenGLSalGraphicsImpl::Init()
maOffscreenTex.GetWidth() != GetWidth() ||
maOffscreenTex.GetHeight() != GetHeight() )
{
- if( mpContext ) // valid context
+ if( mpContext.is() ) // valid context
mpContext->ReleaseFramebuffer( maOffscreenTex );
maOffscreenTex = OpenGLTexture();
}
@@ -158,7 +139,7 @@ void OpenGLSalGraphicsImpl::DeInit()
// let it know. Other eg. VirtualDevice contexts which have
// references on and rely on this context continuing to work will
// get a shiny new context in AcquireContext:: next PreDraw.
- if( mpContext && !IsOffscreen() )
+ if( mpContext.is() && !IsOffscreen() )
mpContext->reset();
}
@@ -216,7 +197,7 @@ void OpenGLSalGraphicsImpl::ApplyProgramMatrices(float fPixelOffset)
void OpenGLSalGraphicsImpl::freeResources()
{
// TODO Delete shaders, programs and textures if not shared
- if( mbOffscreen && mpContext && mpContext->isInitialized() )
+ if( mbOffscreen && mpContext.is() && mpContext->isInitialized() )
{
mpContext->makeCurrent();
mpContext->ReleaseFramebuffer( maOffscreenTex );
diff --git a/vcl/opengl/salbmp.cxx b/vcl/opengl/salbmp.cxx
index 9084ae17dcde..fefa3817b8b2 100644
--- a/vcl/opengl/salbmp.cxx
+++ b/vcl/opengl/salbmp.cxx
@@ -595,7 +595,7 @@ void OpenGLSalBitmap::updateChecksum() const
OpenGLSalBitmap* pThis = const_cast<OpenGLSalBitmap*>(this);
- if (!mpContext)
+ if (!mpContext.is())
{
pThis->CreateTexture();
}
@@ -614,7 +614,7 @@ void OpenGLSalBitmap::updateChecksum() const
}
}
-OpenGLContext* OpenGLSalBitmap::GetBitmapContext()
+rtl::Reference<OpenGLContext> OpenGLSalBitmap::GetBitmapContext()
{
return ImplGetDefaultWindow()->GetGraphics()->GetOpenGLContext();
}
@@ -624,12 +624,14 @@ void OpenGLSalBitmap::makeCurrent()
ImplSVData* pSVData = ImplGetSVData();
// TODO: make sure we can really use the last used context
- mpContext = pSVData->maGDIData.mpLastContext;
- while( mpContext && !mpContext->isInitialized() )
- mpContext = mpContext->mpPrevContext;
- if( !mpContext )
+ OpenGLContext *pContext = pSVData->maGDIData.mpLastContext;
+ while( pContext && !pContext->isInitialized() )
+ pContext = pContext->mpPrevContext;
+ if( pContext )
+ mpContext = pContext;
+ else
mpContext = GetBitmapContext();
- assert(mpContext && "Couldn't get an OpenGL context");
+ assert(mpContext.is() && "Couldn't get an OpenGL context");
mpContext->makeCurrent();
}
diff --git a/vcl/opengl/texture.cxx b/vcl/opengl/texture.cxx
index 57bd7a60a946..9b3c60592ea5 100644
--- a/vcl/opengl/texture.cxx
+++ b/vcl/opengl/texture.cxx
@@ -113,8 +113,8 @@ ImplOpenGLTexture::~ImplOpenGLTexture()
// Check we have been correctly un-bound from all framebuffers.
ImplSVData* pSVData = ImplGetSVData();
- OpenGLContext* pContext = pSVData->maGDIData.mpLastContext;
- if (pContext)
+ rtl::Reference<OpenGLContext> pContext = pSVData->maGDIData.mpLastContext;
+ if (pContext.is())
pContext->UnbindTextureFromFramebuffers( mnTexture );
glDeleteTextures( 1, &mnTexture );
@@ -375,7 +375,7 @@ void OpenGLTexture::Read( GLenum nFormat, GLenum nType, sal_uInt8* pData )
{
// Retrieve current context
ImplSVData* pSVData = ImplGetSVData();
- OpenGLContext* pContext = pSVData->maGDIData.mpLastContext;
+ rtl::Reference<OpenGLContext> pContext = pSVData->maGDIData.mpLastContext;
OpenGLFramebuffer* pFramebuffer;
pFramebuffer = pContext->AcquireFramebuffer( *this );
diff --git a/vcl/opengl/win/gdiimpl.cxx b/vcl/opengl/win/gdiimpl.cxx
index 6896a024ec7d..30088a9deb88 100644
--- a/vcl/opengl/win/gdiimpl.cxx
+++ b/vcl/opengl/win/gdiimpl.cxx
@@ -29,21 +29,21 @@ void WinOpenGLSalGraphicsImpl::copyBits( const SalTwoRect& rPosAry, SalGraphics*
OpenGLSalGraphicsImpl::DoCopyBits( rPosAry, *pImpl );
}
-OpenGLContext* WinOpenGLSalGraphicsImpl::CreateWinContext()
+rtl::Reference<OpenGLContext> WinOpenGLSalGraphicsImpl::CreateWinContext()
{
- OpenGLContext* pContext = new OpenGLContext();
+ rtl::Reference<OpenGLContext> pContext = OpenGLContext::Create();
pContext->requestSingleBufferedRendering();
pContext->init( mrParent.mhLocalDC, mrParent.mhWnd );
return pContext;
}
-bool WinOpenGLSalGraphicsImpl::UseContext( OpenGLContext* pContext )
+bool WinOpenGLSalGraphicsImpl::UseContext( const rtl::Reference<OpenGLContext> &pContext )
{
- if( !pContext || !pContext->isInitialized() )
+ if( !pContext.is() || !pContext->isInitialized() )
return false;
if( IsOffscreen() )
return true;
- return ( pContext->getOpenGLWindow().hWnd == mrParent.mhWnd );
+ return pContext->getOpenGLWindow().hWnd == mrParent.mhWnd;
}
namespace
diff --git a/vcl/opengl/x11/gdiimpl.cxx b/vcl/opengl/x11/gdiimpl.cxx
index 4c592842d9d8..65b279b43f11 100644
--- a/vcl/opengl/x11/gdiimpl.cxx
+++ b/vcl/opengl/x11/gdiimpl.cxx
@@ -44,7 +44,7 @@ void X11OpenGLSalGraphicsImpl::Init()
OpenGLSalGraphicsImpl::Init();
}
-OpenGLContext* X11OpenGLSalGraphicsImpl::CreateWinContext()
+rtl::Reference<OpenGLContext> X11OpenGLSalGraphicsImpl::CreateWinContext()
{
X11WindowProvider *pProvider = dynamic_cast<X11WindowProvider*>(mrParent.m_pFrame);
@@ -52,13 +52,13 @@ OpenGLContext* X11OpenGLSalGraphicsImpl::CreateWinContext()
return NULL;
Window aWin = pProvider->GetX11Window();
- OpenGLContext* pContext = new OpenGLContext();
+ rtl::Reference<OpenGLContext> pContext = OpenGLContext::Create();
pContext->init( mrParent.GetXDisplay(), aWin,
mrParent.m_nXScreen.getXScreen() );
return pContext;
}
-bool X11OpenGLSalGraphicsImpl::UseContext( OpenGLContext* pContext )
+bool X11OpenGLSalGraphicsImpl::UseContext( const rtl::Reference<OpenGLContext> &pContext )
{
X11WindowProvider *pProvider = dynamic_cast<X11WindowProvider*>(mrParent.m_pFrame);
@@ -66,9 +66,9 @@ bool X11OpenGLSalGraphicsImpl::UseContext( OpenGLContext* pContext )
return false;
if( !pProvider )
- return ( pContext->getOpenGLWindow().win != None );
+ return pContext->getOpenGLWindow().win != None;
else
- return ( pContext->getOpenGLWindow().win == pProvider->GetX11Window() );
+ return pContext->getOpenGLWindow().win == pProvider->GetX11Window();
}
void X11OpenGLSalGraphicsImpl::copyBits( const SalTwoRect& rPosAry, SalGraphics* pSrcGraphics )
diff --git a/vcl/source/app/svdata.cxx b/vcl/source/app/svdata.cxx
index bfc2bb402ee7..ca815a2f3103 100644
--- a/vcl/source/app/svdata.cxx
+++ b/vcl/source/app/svdata.cxx
@@ -140,15 +140,9 @@ vcl::Window* ImplGetDefaultWindow()
pSVData->mpDefaultWin->SetText( OUString( "VCL ImplGetDefaultWindow" ) );
// Add a reference to the default context so it never gets deleted
- OpenGLContext* pContext = pSVData->mpDefaultWin->GetGraphics()->GetOpenGLContext();
- if( pContext )
- {
-#ifdef DBG_UTIL
- pContext->AddRef(NULL);
-#else
- pContext->AddRef();
-#endif
- }
+ rtl::Reference<OpenGLContext> pContext = pSVData->mpDefaultWin->GetGraphics()->GetOpenGLContext();
+ if( pContext.is() )
+ pContext->acquire();
}
Application::GetSolarMutex().release();
}
diff --git a/vcl/source/gdi/salgdilayout.cxx b/vcl/source/gdi/salgdilayout.cxx
index 46f76ffb33cc..945f7ae9f687 100644
--- a/vcl/source/gdi/salgdilayout.cxx
+++ b/vcl/source/gdi/salgdilayout.cxx
@@ -76,7 +76,7 @@ SalGraphics::~SalGraphics()
{
}
-OpenGLContext* SalGraphics::GetOpenGLContext() const
+rtl::Reference<OpenGLContext> SalGraphics::GetOpenGLContext() const
{
OpenGLSalGraphicsImpl *pImpl = dynamic_cast<OpenGLSalGraphicsImpl*>(GetImpl());
if (pImpl)
diff --git a/vcl/source/opengl/OpenGLContext.cxx b/vcl/source/opengl/OpenGLContext.cxx
index df8c6a60c18b..d070e3fb3b6b 100644
--- a/vcl/source/opengl/OpenGLContext.cxx
+++ b/vcl/source/opengl/OpenGLContext.cxx
@@ -58,7 +58,7 @@ OpenGLContext::OpenGLContext():
mpWindow(NULL),
m_pChildWindow(NULL),
mbInitialized(false),
- mnRefCount(1),
+ mnRefCount(0),
mbRequestLegacyContext(false),
mbUseDoubleBufferedRendering(true),
mnFramebufferCount(0),
@@ -93,6 +93,9 @@ OpenGLContext::OpenGLContext():
OpenGLContext::~OpenGLContext()
{
VCL_GL_INFO("vcl.opengl", "delete context: " << this);
+ assert (mnRefCount == 0);
+
+ mnRefCount = 1; // guard the shutdown paths.
reset();
ImplSVData* pSVData = ImplGetSVData();
@@ -106,42 +109,13 @@ OpenGLContext::~OpenGLContext()
pSVData->maGDIData.mpLastContext = mpPrevContext;
m_pChildWindow.disposeAndClear();
+ assert (mnRefCount == 1);
}
-#ifdef DBG_UTIL
-void OpenGLContext::AddRef(SalGraphicsImpl* pImpl)
-{
- assert(mnRefCount > 0);
- mnRefCount++;
-
- maParents.insert(pImpl);
-}
-
-void OpenGLContext::DeRef(SalGraphicsImpl* pImpl)
+rtl::Reference<OpenGLContext> OpenGLContext::Create()
{
-
- auto it = maParents.find(pImpl);
- if(it != maParents.end())
- maParents.erase(it);
-
- assert(mnRefCount > 0);
- if( --mnRefCount == 0 )
- delete this;
+ return rtl::Reference<OpenGLContext>(new OpenGLContext);
}
-#else
-void OpenGLContext::AddRef()
-{
- assert(mnRefCount > 0);
- mnRefCount++;
-}
-
-void OpenGLContext::DeRef()
-{
- assert(mnRefCount > 0);
- if( --mnRefCount == 0 )
- delete this;
-}
-#endif
void OpenGLContext::requestLegacyContext()
{
@@ -1337,8 +1311,8 @@ void OpenGLContext::clearCurrent()
// release all framebuffers from the old context so we can re-attach the
// texture in the new context
- OpenGLContext* pCurrentCtx = pSVData->maGDIData.mpLastContext;
- if( pCurrentCtx && pCurrentCtx->isCurrent() )
+ rtl::Reference<OpenGLContext> pCurrentCtx = pSVData->maGDIData.mpLastContext;
+ if( pCurrentCtx.is() && pCurrentCtx->isCurrent() )
pCurrentCtx->ReleaseFramebuffers();
}
@@ -1348,9 +1322,9 @@ void OpenGLContext::prepareForYield()
// release all framebuffers from the old context so we can re-attach the
// texture in the new context
- OpenGLContext* pCurrentCtx = pSVData->maGDIData.mpLastContext;
+ rtl::Reference<OpenGLContext> pCurrentCtx = pSVData->maGDIData.mpLastContext;
- if ( !pCurrentCtx )
+ if ( !pCurrentCtx.is() )
return; // Not using OpenGL
SAL_INFO("vcl.opengl", "Unbinding contexts in preparation for yield");
diff --git a/vcl/unx/generic/window/salframe.cxx b/vcl/unx/generic/window/salframe.cxx
index 2693580071a9..965d3b80f2c6 100644
--- a/vcl/unx/generic/window/salframe.cxx
+++ b/vcl/unx/generic/window/salframe.cxx
@@ -893,8 +893,8 @@ X11SalFrame::~X11SalFrame()
}
// reset all OpenGL contexts using this window
- OpenGLContext* pContext = ImplGetSVData()->maGDIData.mpLastContext;
- while( pContext )
+ rtl::Reference<OpenGLContext> pContext = ImplGetSVData()->maGDIData.mpLastContext;
+ while( pContext.is() )
{
if( pContext->getOpenGLWindow().win == mhWindow )
pContext->reset();
diff --git a/vcl/workben/vcldemo.cxx b/vcl/workben/vcldemo.cxx
index b6c96e280a0e..b3c6c86f63b3 100644
--- a/vcl/workben/vcldemo.cxx
+++ b/vcl/workben/vcldemo.cxx
@@ -1657,8 +1657,8 @@ class OpenGLTests
VclPtr<WorkWindow> mxWinB;
OpenGLSalGraphicsImpl *mpImplA;
OpenGLSalGraphicsImpl *mpImplB;
- OpenGLContext *mpA;
- OpenGLContext *mpB;
+ rtl::Reference<OpenGLContext> mpA;
+ rtl::Reference<OpenGLContext> mpB;
static OpenGLSalGraphicsImpl *getImpl(const VclPtr<OutputDevice> &xOut)
{
@@ -1682,7 +1682,7 @@ public:
mpA = mpImplA->GetOpenGLContext();
mpB = mpImplB->GetOpenGLContext();
- assert (mpA && mpB);
+ assert (mpA.is() && mpB.is());
assert (mpA != mpB);
}
~OpenGLTests()
@@ -1715,9 +1715,9 @@ public:
// get some other guys to leach off this context
VclPtrInstance<VirtualDevice> xVDev;
- OpenGLContext *pContext = getImpl(xVDev)->GetOpenGLContext();
+ rtl::Reference<OpenGLContext> pContext = getImpl(xVDev)->GetOpenGLContext();
VclPtrInstance<VirtualDevice> xVDev2;
- OpenGLContext *pContext2 = getImpl(xVDev)->GetOpenGLContext();
+ rtl::Reference<OpenGLContext> pContext2 = getImpl(xVDev)->GetOpenGLContext();
// sharing the same off-screen context.
assert(pContext == pContext2);