Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1346 insertions, 0 deletions

diff --git a/slideshow/source/engine/opengl/TransitionerImpl.cxx b/slideshow/source/engine/opengl/TransitionerImpl.cxx
new file mode 100644
index 000000000..faef77988
--- /dev/null
+++ b/slideshow/source/engine/opengl/TransitionerImpl.cxx
@@ -0,0 +1,1346 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2008 by Sun Microsystems, Inc.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#include <sal/types.h>
+
+#include <memory>
+
+#include <com/sun/star/beans/XFastPropertySet.hpp>
+#include <com/sun/star/rendering/IntegerBitmapLayout.hpp>
+#include <com/sun/star/rendering/ColorComponentTag.hpp>
+#include <com/sun/star/rendering/ColorSpaceType.hpp>
+#include <com/sun/star/rendering/RenderingIntent.hpp>
+#include <com/sun/star/util/Endianness.hpp>
+#include <com/sun/star/animations/TransitionType.hpp>
+#undef IN
+#undef OUT
+#include <com/sun/star/animations/TransitionSubType.hpp>
+#include <com/sun/star/presentation/XTransitionFactory.hpp>
+#include <com/sun/star/presentation/XTransition.hpp>
+#include <com/sun/star/presentation/XSlideShowView.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/rendering/XIntegerBitmap.hpp>
+#include <com/sun/star/geometry/IntegerSize2D.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+
+#include <cppuhelper/compbase.hxx>
+#include <cppuhelper/basemutex.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <rtl/ref.hxx>
+#include <sal/log.hxx>
+
+#include <canvas/canvastools.hxx>
+
+#include <tools/diagnose_ex.h>
+
+#include <vcl/canvastools.hxx>
+#include <vcl/opengl/OpenGLContext.hxx>
+#include <vcl/opengl/OpenGLHelper.hxx>
+#include <vcl/syschild.hxx>
+#include <vcl/window.hxx>
+
+#include "TransitionImpl.hxx"
+
+#if OSL_DEBUG_LEVEL > 0
+#include <chrono>
+#endif
+
+using namespace ::com::sun::star;
+using ::com::sun::star::beans::XFastPropertySet;
+using ::com::sun::star::uno::Any;
+using ::com::sun::star::uno::Reference;
+using ::com::sun::star::uno::Sequence;
+using ::com::sun::star::uno::UNO_QUERY;
+using ::com::sun::star::uno::UNO_QUERY_THROW;
+
+namespace
+{
+
+typedef cppu::WeakComponentImplHelper<presentation::XTransition> OGLTransitionerImplBase;
+
+#if OSL_DEBUG_LEVEL > 0
+class TimerContext
+{
+public:
+    explicit TimerContext(OUString const& rWhat)
+        : m_aWhat(rWhat)
+        , m_StartTime(std::chrono::steady_clock::now())
+    {
+    }
+    ~TimerContext()
+    {
+        auto const aDuration(std::chrono::steady_clock::now() - m_StartTime);
+        SAL_INFO("slideshow.opengl", m_aWhat << " took: " << std::chrono::duration_cast<std::chrono::microseconds>(aDuration).count());
+    }
+private:
+    OUString const m_aWhat;
+    std::chrono::steady_clock::time_point const m_StartTime;
+};
+#endif
+
+struct OGLFormat
+{
+    GLint  nInternalFormat;
+    GLenum eFormat;
+    GLenum eType;
+};
+
+/* channel ordering: (0:rgba, 1:bgra, 2:argb, 3:abgr)
+ */
+int calcComponentOrderIndex(const uno::Sequence<sal_Int8>& rTags)
+{
+    using namespace rendering::ColorComponentTag;
+
+    static const sal_Int8 aOrderTable[] =
+    {
+        RGB_RED, RGB_GREEN, RGB_BLUE, ALPHA,
+        RGB_BLUE, RGB_GREEN, RGB_RED, ALPHA,
+        ALPHA, RGB_RED, RGB_GREEN, RGB_BLUE,
+        ALPHA, RGB_BLUE, RGB_GREEN, RGB_RED,
+    };
+
+    const sal_Int32 nNumComps(rTags.getLength());
+    const sal_Int8* pLine=aOrderTable;
+    for(int i=0; i<4; ++i)
+    {
+        int j=0;
+        while( j<4 && j<nNumComps && pLine[j] == rTags[j] )
+            ++j;
+
+        // all of the line passed, this is a match!
+        if( j==nNumComps )
+            return i;
+
+        pLine+=4;
+    }
+
+    return -1;
+}
+
+/** This is the Transitioner class for OpenGL 3D transitions in
+ * slideshow. This class is implicitly
+ * constructed from XTransitionFactory.
+*/
+class OGLTransitionerImpl : private cppu::BaseMutex, public OGLTransitionerImplBase
+{
+public:
+    OGLTransitionerImpl();
+    OGLTransitionerImpl(const OGLTransitionerImpl&) = delete;
+    OGLTransitionerImpl& operator=(const OGLTransitionerImpl&) = delete;
+    bool setTransition( const std::shared_ptr<OGLTransitionImpl>& pOGLTransition );
+    bool initialize( const Reference< presentation::XSlideShowView >& xView,
+            const Reference< rendering::XBitmap >& xLeavingSlide,
+            const Reference< rendering::XBitmap >& xEnteringSlide );
+
+    // XTransition
+    virtual void SAL_CALL update( double nTime ) override;
+    virtual void SAL_CALL viewChanged( const Reference< presentation::XSlideShowView >& rView,
+                       const Reference< rendering::XBitmap >& rLeavingBitmap,
+                       const Reference< rendering::XBitmap >& rEnteringBitmap ) override;
+
+protected:
+    void disposeTextures();
+
+    // WeakComponentImplHelperBase
+    virtual void SAL_CALL disposing() override;
+
+    bool isDisposed() const
+    {
+        return (rBHelper.bDisposed || rBHelper.bInDispose);
+    }
+
+    void createTexture( GLuint* texID,
+            bool useMipmap,
+            const uno::Sequence<sal_Int8>& data,
+            const OGLFormat* pFormat );
+    const OGLFormat* chooseFormats();
+
+private:
+    void impl_initializeFlags( bool const bGLXPresent );
+
+    void impl_dispose();
+
+    void setSlides( const Reference< rendering::XBitmap >& xLeavingSlide , const uno::Reference< rendering::XBitmap >& xEnteringSlide );
+    void impl_prepareSlides();
+
+    void impl_createTexture( bool useMipmap, const uno::Sequence<sal_Int8>& data, const OGLFormat* pFormat );
+
+    bool initWindowFromSlideShowView( const uno::Reference< presentation::XSlideShowView >& xView );
+    /** After the window has been created, and the slides have been set, we'll initialize the slides with OpenGL.
+    */
+    void GLInitSlides();
+
+    bool impl_prepareTransition();
+
+private:
+    rtl::Reference<OpenGLContext> mpContext;
+
+    /** OpenGL handle to the leaving slide's texture
+    */
+    GLuint maLeavingSlideGL;
+    /** OpenGL handle to the entering slide's texture
+    */
+    GLuint maEnteringSlideGL;
+
+    Reference< presentation::XSlideShowView > mxView;
+    Reference< rendering::XIntegerBitmap > mxLeavingBitmap;
+    Reference< rendering::XIntegerBitmap > mxEnteringBitmap;
+
+    /** raw bytes of the entering bitmap
+    */
+    uno::Sequence<sal_Int8> maEnteringBytes;
+
+    /** raw bytes of the leaving bitmap
+    */
+    uno::Sequence<sal_Int8> maLeavingBytes;
+
+    bool mbRestoreSync;
+
+    /** the form the raw bytes are in for the bitmaps
+    */
+    rendering::IntegerBitmapLayout maSlideBitmapLayout;
+
+    /** the size of the slides
+    */
+    geometry::IntegerSize2D maSlideSize;
+
+    /** Our Transition to be used.
+    */
+    std::shared_ptr<OGLTransitionImpl> mpTransition;
+
+public:
+    /** whether we are running on ATI fglrx with bug related to textures
+     */
+    bool mbBrokenTexturesATI;
+
+    /** GL version
+     */
+    float mnGLVersion;
+
+    /**
+       Whether the display has GLX extension on X11, always true otherwise (?)
+     */
+    bool mbValidOpenGLContext;
+
+#if OSL_DEBUG_LEVEL > 0
+    std::chrono::steady_clock::time_point m_UpdateStartTime;
+    std::chrono::steady_clock::time_point m_UpdateEndTime;
+    std::chrono::steady_clock::time_point m_StartTime;
+    std::chrono::steady_clock::time_point m_EndTime;
+    std::chrono::steady_clock::duration m_TotalUpdateDuration;
+    int mnFrameCount;
+#endif
+};
+
+bool OGLTransitionerImpl::initialize( const Reference< presentation::XSlideShowView >& xView,
+        const Reference< rendering::XBitmap >& xLeavingSlide,
+        const Reference< rendering::XBitmap >& xEnteringSlide )
+{
+    bool const bValidContext( initWindowFromSlideShowView( xView ) );
+    impl_initializeFlags( bValidContext );
+
+    setSlides( xLeavingSlide, xEnteringSlide );
+
+    return mbValidOpenGLContext;
+}
+
+void OGLTransitionerImpl::impl_initializeFlags( bool const bValidContext )
+{
+    mbValidOpenGLContext = bValidContext;
+    if ( bValidContext ) {
+        CHECK_GL_ERROR();
+
+        mnGLVersion = OpenGLHelper::getGLVersion();
+        SAL_INFO("slideshow.opengl", "GL version: " << mnGLVersion << "" );
+
+#if defined( UNX ) && !defined( MACOSX )
+        const GLubyte* vendor = glGetString( GL_VENDOR );
+        /* TODO: check for version once the bug in fglrx driver is fixed */
+        mbBrokenTexturesATI = (vendor && strcmp( reinterpret_cast<const char *>(vendor), "ATI Technologies Inc." ) == 0 );
+#endif
+
+        CHECK_GL_ERROR();
+    }
+}
+
+bool OGLTransitionerImpl::initWindowFromSlideShowView( const Reference< presentation::XSlideShowView >& xView )
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    if (isDisposed())
+        return false;
+
+    mxView = xView;
+    if( !mxView.is() )
+        return false;
+
+#if OSL_DEBUG_LEVEL > 0
+    TimerContext aTimerContext("initWindowFromSlideShowView");
+#endif
+
+    /// take the XSlideShowView and extract the parent window from it. see viewmediashape.cxx
+    uno::Reference< rendering::XCanvas > xCanvas(mxView->getCanvas(), uno::UNO_QUERY_THROW);
+    uno::Sequence< uno::Any > aDeviceParams;
+    ::canvas::tools::getDeviceInfo( xCanvas, aDeviceParams );
+
+    OUString aImplName;
+    aDeviceParams[ 0 ] >>= aImplName;
+
+    sal_Int64 aVal = 0;
+    aDeviceParams[1] >>= aVal;
+
+    mpContext = OpenGLContext::Create();
+
+    OutputDevice* pDevice = reinterpret_cast<OutputDevice*>(aVal);
+    vcl::Window* pWindow = pDevice ? pDevice->GetOwnerWindow() : nullptr;
+
+    if( !mpContext->init( pWindow) ) {
+        mpContext->requestLegacyContext();
+        if( !mpContext->init( pWindow ) )
+            return false;
+    }
+    SAL_INFO("slideshow.opengl", "created the context");
+
+    mpContext->makeCurrent();
+    CHECK_GL_ERROR();
+
+    awt::Rectangle aCanvasArea = mxView->getCanvasArea();
+    mpContext->setWinPosAndSize(Point(aCanvasArea.X, aCanvasArea.Y), Size(aCanvasArea.Width, aCanvasArea.Height));
+    SAL_INFO("slideshow.opengl", "canvas area: " << aCanvasArea.X << "," << aCanvasArea.Y << " - " << aCanvasArea.Width << "x" << aCanvasArea.Height);
+
+    CHECK_GL_ERROR();
+    glEnable(GL_CULL_FACE);
+    CHECK_GL_ERROR();
+    glCullFace(GL_BACK);
+    CHECK_GL_ERROR();
+    glClearColor (0, 0, 0, 0);
+    CHECK_GL_ERROR();
+    glClear(GL_COLOR_BUFFER_BIT);
+    CHECK_GL_ERROR();
+
+    mpContext->swapBuffers();
+
+    CHECK_GL_ERROR();
+
+    return true;
+}
+
+void OGLTransitionerImpl::setSlides( const uno::Reference< rendering::XBitmap >& xLeavingSlide,
+                                     const uno::Reference< rendering::XBitmap >& xEnteringSlide )
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    if (isDisposed())
+        return;
+
+    mxLeavingBitmap.set( xLeavingSlide , UNO_QUERY_THROW );
+    mxEnteringBitmap.set( xEnteringSlide , UNO_QUERY_THROW );
+
+    maSlideSize = mxLeavingBitmap->getSize();
+    SAL_INFO("slideshow.opengl", "leaving bitmap area: " << maSlideSize.Width << "x" << maSlideSize.Height);
+    maSlideSize = mxEnteringBitmap->getSize();
+    SAL_INFO("slideshow.opengl", "entering bitmap area: " << maSlideSize.Width << "x" << maSlideSize.Height);
+
+    //to avoid annoying flashing under X entering and leaving slides with opengl effects set the leaving
+    //bitmap as the background pixmap of the opengl child window and the entering bitmap as the background
+    //pixmap of the non-opengl parent window. If any expose events occur around the start and end of
+    //the transition then those windows are default filled by X with the desired start/end image so there's
+    //no visible flash
+    SystemChildWindow* pChildWindow = mpContext->getChildWindow();
+    if (!pChildWindow)
+        return;
+
+    css::uno::Reference<css::beans::XFastPropertySet> xEnteringFastPropertySet(mxEnteringBitmap, css::uno::UNO_QUERY);
+    css::uno::Reference<css::beans::XFastPropertySet> xLeavingFastPropertySet(mxLeavingBitmap, css::uno::UNO_QUERY);
+    css::uno::Sequence<css::uno::Any> aEnteringBitmap;
+    css::uno::Sequence<css::uno::Any> aLeavingBitmap;
+    if (xEnteringFastPropertySet && xLeavingFastPropertySet)
+    {
+        xEnteringFastPropertySet->getFastPropertyValue(1) >>= aEnteringBitmap;
+        xLeavingFastPropertySet->getFastPropertyValue(1) >>= aLeavingBitmap;
+    }
+    if (aEnteringBitmap.getLength() == 3 && aLeavingBitmap.getLength() == 3)
+        pChildWindow->SetLeaveEnterBackgrounds(aLeavingBitmap, aEnteringBitmap);
+}
+
+
+void OGLTransitionerImpl::impl_prepareSlides()
+{
+    geometry::IntegerRectangle2D aSlideRect;
+    aSlideRect.X1 = 0;
+    aSlideRect.X2 = maSlideSize.Width;
+    aSlideRect.Y1 = 0;
+    aSlideRect.Y2 = maSlideSize.Height;
+
+    CHECK_GL_ERROR();
+    mpContext->sync();
+    CHECK_GL_ERROR();
+
+    maLeavingBytes = mxLeavingBitmap->getData(maSlideBitmapLayout, aSlideRect);
+    maEnteringBytes = mxEnteringBitmap->getData(maSlideBitmapLayout, aSlideRect);
+
+    CHECK_GL_ERROR();
+    GLInitSlides();
+
+    SAL_WARN_IF(maSlideBitmapLayout.PlaneStride != 0, "slideshow.opengl","only handle no plane stride now");
+
+    mpContext->sync();
+
+    CHECK_GL_ERROR();
+
+    // synchronized X still gives us much smoother play
+    // I suspect some issues in above code in slideshow
+    // synchronize whole transition for now
+    const GLWindow& rGLWindow(mpContext->getOpenGLWindow());
+    mbRestoreSync = rGLWindow.Synchronize(true);
+}
+
+bool OGLTransitionerImpl::impl_prepareTransition()
+{
+    if( mpTransition && mpTransition->getSettings().mnRequiredGLVersion <= mnGLVersion )
+        return mpTransition->prepare( maLeavingSlideGL, maEnteringSlideGL, mpContext.get() );
+    return false;
+}
+
+bool OGLTransitionerImpl::setTransition( const std::shared_ptr<OGLTransitionImpl>& pTransition )
+{
+    if ( mpTransition ) // already initialized
+        return true;
+
+    mpTransition = pTransition;
+
+    mpContext->makeCurrent();
+    CHECK_GL_ERROR();
+
+    bool succeeded = impl_prepareTransition();
+    if (!succeeded) {
+        mpTransition = nullptr;
+        return false;
+    }
+
+    impl_prepareSlides();
+
+    // tdf#91456: When the OpenGL context is initialized but nothing has been rendered on it
+    // it can happen, that an "empty" screen is drawn. Therefore, drawing the content of time 0
+    // onto the context
+    update(0);
+
+    return true;
+}
+
+void OGLTransitionerImpl::createTexture( GLuint* texID,
+                     bool useMipmap,
+                     const uno::Sequence<sal_Int8>& data,
+                     const OGLFormat* pFormat )
+{
+    CHECK_GL_ERROR();
+    glDeleteTextures( 1, texID );
+    glGenTextures( 1, texID );
+    glBindTexture( GL_TEXTURE_2D, *texID );
+    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER );
+    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER );
+    CHECK_GL_ERROR();
+
+    impl_createTexture( useMipmap, data, pFormat );
+
+    SAL_WARN_IF(!glIsTexture(*texID), "slideshow.opengl", "Can't generate Leaving slide textures in OpenGL");
+    CHECK_GL_ERROR();
+}
+
+class OGLColorSpace : public cppu::WeakImplHelper< css::rendering::XIntegerBitmapColorSpace >
+{
+private:
+    uno::Sequence< sal_Int8 >  maComponentTags;
+    uno::Sequence< sal_Int32 > maBitCounts;
+
+    virtual sal_Int8 SAL_CALL getType(  ) override
+    {
+        return rendering::ColorSpaceType::RGB;
+    }
+    virtual uno::Sequence< sal_Int8 > SAL_CALL getComponentTags(  ) override
+    {
+        return maComponentTags;
+    }
+    virtual sal_Int8 SAL_CALL getRenderingIntent(  ) override
+    {
+        return rendering::RenderingIntent::PERCEPTUAL;
+    }
+    virtual uno::Sequence< beans::PropertyValue > SAL_CALL getProperties(  ) override
+    {
+        return uno::Sequence< beans::PropertyValue >();
+    }
+    virtual uno::Sequence< double > SAL_CALL convertColorSpace( const uno::Sequence< double >& deviceColor,
+                                                                const uno::Reference< rendering::XColorSpace >& targetColorSpace ) override
+    {
+        // TODO(P3): if we know anything about target
+        // colorspace, this can be greatly sped up
+        uno::Sequence<rendering::ARGBColor> aIntermediate(
+            convertToARGB(deviceColor));
+        return targetColorSpace->convertFromARGB(aIntermediate);
+    }
+    virtual uno::Sequence< rendering::RGBColor > SAL_CALL convertToRGB( const uno::Sequence< double >& deviceColor ) override
+    {
+        const double*  pIn( deviceColor.getConstArray() );
+        const std::size_t nLen( deviceColor.getLength() );
+        ENSURE_ARG_OR_THROW2(nLen%4==0,
+                                "number of channels no multiple of 4",
+                                static_cast<rendering::XColorSpace*>(this), 0);
+
+        uno::Sequence< rendering::RGBColor > aRes(nLen/4);
+        rendering::RGBColor* pOut( aRes.getArray() );
+        for( std::size_t i=0; i<nLen; i+=4 )
+        {
+            *pOut++ = rendering::RGBColor(pIn[0],pIn[1],pIn[2]);
+            pIn += 4;
+        }
+        return aRes;
+    }
+    virtual uno::Sequence< rendering::ARGBColor > SAL_CALL convertToARGB( const uno::Sequence< double >& deviceColor ) override
+    {
+        const double*  pIn( deviceColor.getConstArray() );
+        const std::size_t nLen( deviceColor.getLength() );
+        ENSURE_ARG_OR_THROW2(nLen%4==0,
+                                "number of channels no multiple of 4",
+                                static_cast<rendering::XColorSpace*>(this), 0);
+
+        uno::Sequence< rendering::ARGBColor > aRes(nLen/4);
+        rendering::ARGBColor* pOut( aRes.getArray() );
+        for( std::size_t i=0; i<nLen; i+=4 )
+        {
+            *pOut++ = rendering::ARGBColor(pIn[3],pIn[0],pIn[1],pIn[2]);
+            pIn += 4;
+        }
+        return aRes;
+    }
+    virtual uno::Sequence< rendering::ARGBColor > SAL_CALL convertToPARGB( const uno::Sequence< double >& deviceColor ) override
+    {
+        const double*  pIn( deviceColor.getConstArray() );
+        const std::size_t nLen( deviceColor.getLength() );
+        ENSURE_ARG_OR_THROW2(nLen%4==0,
+                                "number of channels no multiple of 4",
+                                static_cast<rendering::XColorSpace*>(this), 0);
+
+        uno::Sequence< rendering::ARGBColor > aRes(nLen/4);
+        rendering::ARGBColor* pOut( aRes.getArray() );
+        for( std::size_t i=0; i<nLen; i+=4 )
+        {
+            *pOut++ = rendering::ARGBColor(pIn[3],pIn[3]*pIn[0],pIn[3]*pIn[1],pIn[3]*pIn[2]);
+            pIn += 4;
+        }
+        return aRes;
+    }
+    virtual uno::Sequence< double > SAL_CALL convertFromRGB( const uno::Sequence< rendering::RGBColor >& rgbColor ) override
+    {
+        const sal_Int32 nLen( rgbColor.getLength() );
+
+        uno::Sequence< double > aRes(nLen*4);
+        double* pColors=aRes.getArray();
+        for( const rendering::RGBColor& rIn : rgbColor )
+        {
+            *pColors++ = rIn.Red;
+            *pColors++ = rIn.Green;
+            *pColors++ = rIn.Blue;
+            *pColors++ = 1.0;
+        }
+        return aRes;
+    }
+    virtual uno::Sequence< double > SAL_CALL convertFromARGB( const uno::Sequence< rendering::ARGBColor >& rgbColor ) override
+    {
+        const sal_Int32 nLen( rgbColor.getLength() );
+
+        uno::Sequence< double > aRes(nLen*4);
+        double* pColors=aRes.getArray();
+        for( const rendering::ARGBColor& rIn : rgbColor )
+        {
+            *pColors++ = rIn.Red;
+            *pColors++ = rIn.Green;
+            *pColors++ = rIn.Blue;
+            *pColors++ = rIn.Alpha;
+        }
+        return aRes;
+    }
+    virtual uno::Sequence< double > SAL_CALL convertFromPARGB( const uno::Sequence< rendering::ARGBColor >& rgbColor ) override
+    {
+        const sal_Int32 nLen( rgbColor.getLength() );
+
+        uno::Sequence< double > aRes(nLen*4);
+        double* pColors=aRes.getArray();
+        for( const rendering::ARGBColor& rIn : rgbColor )
+        {
+            *pColors++ = rIn.Red/rIn.Alpha;
+            *pColors++ = rIn.Green/rIn.Alpha;
+            *pColors++ = rIn.Blue/rIn.Alpha;
+            *pColors++ = rIn.Alpha;
+        }
+        return aRes;
+    }
+
+    // XIntegerBitmapColorSpace
+    virtual sal_Int32 SAL_CALL getBitsPerPixel(  ) override
+    {
+        return 32;
+    }
+    virtual uno::Sequence< sal_Int32 > SAL_CALL getComponentBitCounts(  ) override
+    {
+        return maBitCounts;
+    }
+    virtual sal_Int8 SAL_CALL getEndianness(  ) override
+    {
+        return util::Endianness::LITTLE;
+    }
+    virtual uno::Sequence<double> SAL_CALL convertFromIntegerColorSpace( const uno::Sequence< sal_Int8 >& deviceColor,
+                                                                            const uno::Reference< rendering::XColorSpace >& targetColorSpace ) override
+    {
+        if( dynamic_cast<OGLColorSpace*>(targetColorSpace.get()) )
+        {
+            const sal_Int32  nLen( deviceColor.getLength() );
+            ENSURE_ARG_OR_THROW2(nLen%4==0,
+                                    "number of channels no multiple of 4",
+                                    static_cast<rendering::XColorSpace*>(this), 0);
+
+            uno::Sequence<double> aRes(nLen);
+            std::transform(deviceColor.begin(), deviceColor.end(), aRes.getArray(),
+                           vcl::unotools::toDoubleColor);
+            return aRes;
+        }
+        else
+        {
+            // TODO(P3): if we know anything about target
+            // colorspace, this can be greatly sped up
+            uno::Sequence<rendering::ARGBColor> aIntermediate(
+                convertIntegerToARGB(deviceColor));
+            return targetColorSpace->convertFromARGB(aIntermediate);
+        }
+    }
+    virtual uno::Sequence< sal_Int8 > SAL_CALL convertToIntegerColorSpace( const uno::Sequence< sal_Int8 >& deviceColor,
+                                                                                const uno::Reference< rendering::XIntegerBitmapColorSpace >& targetColorSpace ) override
+    {
+        if( dynamic_cast<OGLColorSpace*>(targetColorSpace.get()) )
+        {
+            // it's us, so simply pass-through the data
+            return deviceColor;
+        }
+        else
+        {
+            // TODO(P3): if we know anything about target
+            // colorspace, this can be greatly sped up
+            uno::Sequence<rendering::ARGBColor> aIntermediate(
+                convertIntegerToARGB(deviceColor));
+            return targetColorSpace->convertIntegerFromARGB(aIntermediate);
+        }
+    }
+    virtual uno::Sequence< rendering::RGBColor > SAL_CALL convertIntegerToRGB( const uno::Sequence< sal_Int8 >& deviceColor ) override
+    {
+        const sal_Int8* pIn( deviceColor.getConstArray() );
+        const std::size_t  nLen( deviceColor.getLength() );
+        ENSURE_ARG_OR_THROW2(nLen%4==0,
+                                "number of channels no multiple of 4",
+                                static_cast<rendering::XColorSpace*>(this), 0);
+
+        uno::Sequence< rendering::RGBColor > aRes(nLen/4);
+        rendering::RGBColor* pOut( aRes.getArray() );
+        for( std::size_t i=0; i<nLen; i+=4 )
+        {
+            *pOut++ = rendering::RGBColor(
+                vcl::unotools::toDoubleColor(pIn[0]),
+                vcl::unotools::toDoubleColor(pIn[1]),
+                vcl::unotools::toDoubleColor(pIn[2]));
+            pIn += 4;
+        }
+        return aRes;
+    }
+
+    virtual uno::Sequence< rendering::ARGBColor > SAL_CALL convertIntegerToARGB( const uno::Sequence< sal_Int8 >& deviceColor ) override
+    {
+        const sal_Int8* pIn( deviceColor.getConstArray() );
+        const std::size_t  nLen( deviceColor.getLength() );
+        ENSURE_ARG_OR_THROW2(nLen%4==0,
+                                "number of channels no multiple of 4",
+                                static_cast<rendering::XColorSpace*>(this), 0);
+
+        uno::Sequence< rendering::ARGBColor > aRes(nLen/4);
+        rendering::ARGBColor* pOut( aRes.getArray() );
+        for( std::size_t i=0; i<nLen; i+=4 )
+        {
+            *pOut++ = rendering::ARGBColor(
+                vcl::unotools::toDoubleColor(pIn[3]),
+                vcl::unotools::toDoubleColor(pIn[0]),
+                vcl::unotools::toDoubleColor(pIn[1]),
+                vcl::unotools::toDoubleColor(pIn[2]));
+            pIn += 4;
+        }
+        return aRes;
+    }
+
+    virtual uno::Sequence< rendering::ARGBColor > SAL_CALL convertIntegerToPARGB( const uno::Sequence< sal_Int8 >& deviceColor ) override
+    {
+        const sal_Int8* pIn( deviceColor.getConstArray() );
+        const std::size_t  nLen( deviceColor.getLength() );
+        ENSURE_ARG_OR_THROW2(nLen%4==0,
+                                "number of channels no multiple of 4",
+                                static_cast<rendering::XColorSpace*>(this), 0);
+
+        uno::Sequence< rendering::ARGBColor > aRes(nLen/4);
+        rendering::ARGBColor* pOut( aRes.getArray() );
+        for( std::size_t i=0; i<nLen; i+=4 )
+        {
+            const sal_Int8 nAlpha( pIn[3] );
+            *pOut++ = rendering::ARGBColor(
+                vcl::unotools::toDoubleColor(nAlpha),
+                vcl::unotools::toDoubleColor(nAlpha*pIn[0]),
+                vcl::unotools::toDoubleColor(nAlpha*pIn[1]),
+                vcl::unotools::toDoubleColor(nAlpha*pIn[2]));
+            pIn += 4;
+        }
+        return aRes;
+    }
+
+    virtual uno::Sequence< sal_Int8 > SAL_CALL convertIntegerFromRGB( const uno::Sequence< rendering::RGBColor >& rgbColor ) override
+    {
+        const sal_Int32 nLen( rgbColor.getLength() );
+
+        uno::Sequence< sal_Int8 > aRes(nLen*4);
+        sal_Int8* pColors=aRes.getArray();
+        for( const rendering::RGBColor& rIn : rgbColor )
+        {
+            *pColors++ = vcl::unotools::toByteColor(rIn.Red);
+            *pColors++ = vcl::unotools::toByteColor(rIn.Green);
+            *pColors++ = vcl::unotools::toByteColor(rIn.Blue);
+            *pColors++ = -1;
+        }
+        return aRes;
+    }
+
+    virtual uno::Sequence< sal_Int8 > SAL_CALL convertIntegerFromARGB( const uno::Sequence< rendering::ARGBColor >& rgbColor ) override
+    {
+        const sal_Int32 nLen( rgbColor.getLength() );
+
+        uno::Sequence< sal_Int8 > aRes(nLen*4);
+        sal_Int8* pColors=aRes.getArray();
+        for( const rendering::ARGBColor& rIn : rgbColor )
+        {
+            *pColors++ = vcl::unotools::toByteColor(rIn.Red);
+            *pColors++ = vcl::unotools::toByteColor(rIn.Green);
+            *pColors++ = vcl::unotools::toByteColor(rIn.Blue);
+            *pColors++ = vcl::unotools::toByteColor(rIn.Alpha);
+        }
+        return aRes;
+    }
+
+    virtual uno::Sequence< sal_Int8 > SAL_CALL convertIntegerFromPARGB( const uno::Sequence< rendering::ARGBColor >& rgbColor ) override
+    {
+        const sal_Int32 nLen( rgbColor.getLength() );
+
+        uno::Sequence< sal_Int8 > aRes(nLen*4);
+        sal_Int8* pColors=aRes.getArray();
+        for( const rendering::ARGBColor& rIn : rgbColor )
+        {
+            *pColors++ = vcl::unotools::toByteColor(rIn.Red/rIn.Alpha);
+            *pColors++ = vcl::unotools::toByteColor(rIn.Green/rIn.Alpha);
+            *pColors++ = vcl::unotools::toByteColor(rIn.Blue/rIn.Alpha);
+            *pColors++ = vcl::unotools::toByteColor(rIn.Alpha);
+        }
+        return aRes;
+    }
+
+public:
+    OGLColorSpace() :
+        maComponentTags(4),
+        maBitCounts(4)
+    {
+        sal_Int8*  pTags = maComponentTags.getArray();
+        sal_Int32* pBitCounts = maBitCounts.getArray();
+        pTags[0] = rendering::ColorComponentTag::RGB_RED;
+        pTags[1] = rendering::ColorComponentTag::RGB_GREEN;
+        pTags[2] = rendering::ColorComponentTag::RGB_BLUE;
+        pTags[3] = rendering::ColorComponentTag::ALPHA;
+
+        pBitCounts[0] =
+        pBitCounts[1] =
+        pBitCounts[2] =
+        pBitCounts[3] = 8;
+    }
+};
+
+struct OGLColorSpaceHolder : public rtl::StaticWithInit<uno::Reference<rendering::XIntegerBitmapColorSpace>, OGLColorSpaceHolder>
+{
+    uno::Reference<rendering::XIntegerBitmapColorSpace> operator()()
+    {
+        return new OGLColorSpace();
+    }
+};
+
+uno::Reference<rendering::XIntegerBitmapColorSpace> const &
+getOGLColorSpace()
+{
+    return OGLColorSpaceHolder::get();
+}
+
+void buildMipmaps(
+    GLint internalFormat, GLsizei width, GLsizei height, GLenum format,
+    GLenum type, const void * data)
+{
+    if (epoxy_has_gl_extension("GL_ARB_framebuffer_object")) {
+        glTexImage2D(
+            GL_TEXTURE_2D, 0, internalFormat, width, height, 0, format, type,
+            data);
+        glGenerateMipmap(GL_TEXTURE_2D);
+    } else {
+        glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);
+        glTexImage2D(
+            GL_TEXTURE_2D, 0, internalFormat, width, height, 0, format, type,
+            data);
+        glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_FALSE);
+    }
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameteri(
+        GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+}
+
+void OGLTransitionerImpl::impl_createTexture(
+                     bool useMipmap,
+                     const uno::Sequence<sal_Int8>& data,
+                     const OGLFormat* pFormat )
+{
+    if( !pFormat )
+    {
+        CHECK_GL_ERROR();
+        // force-convert color to ARGB8888 int color space
+        uno::Sequence<sal_Int8> tempBytes(
+            maSlideBitmapLayout.ColorSpace->convertToIntegerColorSpace(
+                data,
+                getOGLColorSpace()));
+        buildMipmaps(     GL_RGBA,
+                          maSlideSize.Width,
+                          maSlideSize.Height,
+                          GL_RGBA,
+                          GL_UNSIGNED_BYTE,
+                          &tempBytes[0]);
+
+        if (epoxy_has_gl_extension("GL_EXT_texture_filter_anisotropic"))
+        {
+            //anistropic filtering (to make texturing not suck when looking at polygons from oblique angles)
+            GLfloat largest_supported_anisotropy;
+            glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &largest_supported_anisotropy);
+            glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, largest_supported_anisotropy);
+        }
+    } else {
+        if( mpTransition && !mbBrokenTexturesATI && !useMipmap) {
+            glTexImage2D( GL_TEXTURE_2D, 0, pFormat->nInternalFormat, maSlideSize.Width, maSlideSize.Height, 0, pFormat->eFormat, pFormat->eType, &data[0] );
+            glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST);
+            glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST);
+        } else {
+            buildMipmaps( pFormat->nInternalFormat, maSlideSize.Width, maSlideSize.Height, pFormat->eFormat, pFormat->eType, &data[0] );
+
+            if (epoxy_has_gl_extension("GL_EXT_texture_filter_anisotropic"))
+            {
+                //anistropic filtering (to make texturing not suck when looking at polygons from oblique angles)
+                GLfloat largest_supported_anisotropy;
+                glGetFloatv( GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &largest_supported_anisotropy );
+                glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, largest_supported_anisotropy );
+            }
+        }
+    }
+    CHECK_GL_ERROR();
+}
+
+const OGLFormat* OGLTransitionerImpl::chooseFormats()
+{
+    const OGLFormat* pDetectedFormat=nullptr;
+    uno::Reference<rendering::XIntegerBitmapColorSpace> xIntColorSpace(
+        maSlideBitmapLayout.ColorSpace);
+
+    if( xIntColorSpace->getType() == rendering::ColorSpaceType::RGB ||
+        xIntColorSpace->getType() == rendering::ColorSpaceType::SRGB )
+    {
+        /* table for canvas->OGL format mapping. outer index is number
+           of color components (0:3, 1:4), then comes bits per pixel
+           (0:16, 1:24, 2:32), then channel ordering: (0:rgba, 1:bgra,
+           2:argb, 3:abgr)
+         */
+        static const OGLFormat lcl_RGB24[] =
+        {
+            // 24 bit RGB
+            {3, GL_BGR, GL_UNSIGNED_BYTE},
+            {3, GL_RGB, GL_UNSIGNED_BYTE},
+            {3, GL_BGR, GL_UNSIGNED_BYTE},
+            {3, GL_RGB, GL_UNSIGNED_BYTE}
+        };
+
+#if defined(GL_VERSION_1_2) && defined(GLU_VERSION_1_3)
+        // more format constants available
+        static const OGLFormat lcl_RGB16[] =
+        {
+            // 16 bit RGB
+            {3, GL_RGB, GL_UNSIGNED_SHORT_5_6_5_REV},
+            {3, GL_RGB, GL_UNSIGNED_SHORT_5_6_5},
+            {3, GL_RGB, GL_UNSIGNED_SHORT_5_6_5_REV},
+            {3, GL_RGB, GL_UNSIGNED_SHORT_5_6_5}
+        };
+
+        static const OGLFormat lcl_ARGB16_4[] =
+        {
+            // 16 bit ARGB
+            {4, GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4_REV},
+            {4, GL_BGRA, GL_UNSIGNED_SHORT_4_4_4_4_REV},
+            {4, GL_BGRA, GL_UNSIGNED_SHORT_4_4_4_4},
+            {4, GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4}
+        };
+
+        static const OGLFormat lcl_ARGB16_5[] =
+        {
+            // 16 bit ARGB
+            {4, GL_RGBA, GL_UNSIGNED_SHORT_1_5_5_5_REV},
+            {4, GL_BGRA, GL_UNSIGNED_SHORT_1_5_5_5_REV},
+            {4, GL_BGRA, GL_UNSIGNED_SHORT_5_5_5_1},
+            {4, GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1}
+        };
+
+        static const OGLFormat lcl_ARGB32[] =
+        {
+            // 32 bit ARGB
+            {4, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8_REV},
+            {4, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV},
+            {4, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8},
+            {4, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8}
+        };
+
+        const uno::Sequence<sal_Int8> aComponentTags(
+            xIntColorSpace->getComponentTags());
+        const uno::Sequence<sal_Int32> aComponentBitcounts(
+            xIntColorSpace->getComponentBitCounts());
+        const sal_Int32 nNumComponents( aComponentBitcounts.getLength() );
+        const sal_Int32 nBitsPerPixel( xIntColorSpace->getBitsPerPixel() );
+
+        // supported component ordering?
+        const int nComponentOrderIndex(
+            calcComponentOrderIndex(aComponentTags));
+        if( nComponentOrderIndex != -1 )
+        {
+            switch( nBitsPerPixel )
+            {
+                case 16:
+                    if( nNumComponents == 3 )
+                    {
+                        pDetectedFormat = &lcl_RGB16[nComponentOrderIndex];
+                    }
+                    else if( nNumComponents == 4 )
+                    {
+                        if( aComponentBitcounts[1] == 4 )
+                        {
+                            pDetectedFormat = &lcl_ARGB16_4[nComponentOrderIndex];
+                        }
+                        else if( aComponentBitcounts[1] == 5 )
+                        {
+                            pDetectedFormat = &lcl_ARGB16_5[nComponentOrderIndex];
+                        }
+                    }
+                    break;
+                case 24:
+                    if( nNumComponents == 3 )
+                    {
+                        pDetectedFormat = &lcl_RGB24[nComponentOrderIndex];
+                    }
+                    break;
+                case 32:
+                    if ( nNumComponents == 4 )
+                    {
+                        pDetectedFormat = &lcl_ARGB32[nComponentOrderIndex];
+                    }
+                    break;
+            }
+        }
+#else
+        const uno::Sequence<sal_Int8> aComponentTags(
+            xIntColorSpace->getComponentTags());
+        const int nComponentOrderIndex(calcComponentOrderIndex(aComponentTags));
+        if( aComponentTags.getLength() == 3 &&
+            nComponentOrderIndex != -1 &&
+            xIntColorSpace->getBitsPerPixel() == 24 )
+        {
+            pDetectedFormat = &lcl_RGB24[nComponentOrderIndex];
+        }
+#endif
+    }
+
+    return pDetectedFormat;
+}
+
+void OGLTransitionerImpl::GLInitSlides()
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    if (isDisposed() || !mpTransition || mpTransition->getSettings().mnRequiredGLVersion > mnGLVersion)
+        return;
+
+#if OSL_DEBUG_LEVEL > 0
+    TimerContext aTimerContext("texture creation");
+#endif
+
+    mpContext->makeCurrent();
+
+    const OGLFormat* pFormat = chooseFormats();
+
+    CHECK_GL_ERROR();
+    createTexture( &maLeavingSlideGL,
+           mpTransition->getSettings().mbUseMipMapLeaving,
+           maLeavingBytes,
+           pFormat );
+
+    createTexture( &maEnteringSlideGL,
+           mpTransition->getSettings().mbUseMipMapEntering,
+           maEnteringBytes,
+           pFormat );
+
+    CHECK_GL_ERROR();
+    mpContext->sync();
+    CHECK_GL_ERROR();
+}
+
+void SAL_CALL OGLTransitionerImpl::update( double nTime )
+{
+#if OSL_DEBUG_LEVEL > 0
+    mnFrameCount ++;
+    m_UpdateStartTime = std::chrono::steady_clock::now();
+    if( mnFrameCount == 1 ) {
+        m_StartTime = m_UpdateStartTime;
+        m_TotalUpdateDuration = std::chrono::seconds(0);
+    }
+#endif
+    osl::MutexGuard const guard( m_aMutex );
+
+    if (isDisposed() || !mbValidOpenGLContext || !mpTransition || mpTransition->getSettings().mnRequiredGLVersion > mnGLVersion)
+        return;
+
+    mpContext->makeCurrent();
+    CHECK_GL_ERROR();
+
+    glEnable(GL_DEPTH_TEST);
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+    CHECK_GL_ERROR();
+
+    const GLWindow& rGLWindow(mpContext->getOpenGLWindow());
+    mpTransition->display(nTime, maLeavingSlideGL, maEnteringSlideGL,
+                          maSlideSize.Width, maSlideSize.Height,
+                          static_cast<double>(rGLWindow.Width),
+                          static_cast<double>(rGLWindow.Height),
+                          mpContext.get());
+
+    mpContext->swapBuffers();
+
+    mpContext->show();
+    mpContext->sync();
+    CHECK_GL_ERROR();
+
+#if OSL_DEBUG_LEVEL > 0
+    m_UpdateEndTime = std::chrono::steady_clock::now();
+
+    SAL_INFO("slideshow.opengl", "update time: " << nTime);
+    SAL_INFO("slideshow.opengl", "update took: " << std::chrono::duration_cast<std::chrono::milliseconds>(m_UpdateEndTime - m_UpdateStartTime).count());
+    m_TotalUpdateDuration += m_UpdateEndTime - m_UpdateStartTime;
+#endif
+}
+
+void SAL_CALL OGLTransitionerImpl::viewChanged( const Reference< presentation::XSlideShowView >& rView,
+                        const Reference< rendering::XBitmap >& rLeavingBitmap,
+                        const Reference< rendering::XBitmap >& rEnteringBitmap )
+{
+    SAL_INFO("slideshow.opengl", "transitioner: view changed");
+
+    impl_dispose();
+
+    initWindowFromSlideShowView( rView );
+    setSlides( rLeavingBitmap, rEnteringBitmap );
+    impl_prepareSlides();
+    impl_prepareTransition();
+}
+
+void OGLTransitionerImpl::disposeTextures()
+{
+    if (!mbValidOpenGLContext)
+        return;
+
+    mpContext->makeCurrent();
+    CHECK_GL_ERROR();
+
+    glDeleteTextures(1,&maLeavingSlideGL);
+    maLeavingSlideGL = 0;
+    glDeleteTextures(1,&maEnteringSlideGL);
+    maEnteringSlideGL = 0;
+
+    CHECK_GL_ERROR();
+}
+
+void OGLTransitionerImpl::impl_dispose()
+{
+    if (mbValidOpenGLContext)
+    {
+        mpContext->makeCurrent();
+        CHECK_GL_ERROR();
+    }
+
+    if( mpTransition && mpTransition->getSettings().mnRequiredGLVersion <= mnGLVersion )
+        mpTransition->finish();
+    disposeTextures();
+    if( mpContext.is() )
+        mpContext->dispose();
+    mpContext.clear();
+}
+
+// we are about to be disposed (someone call dispose() on us)
+void OGLTransitionerImpl::disposing()
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+#if OSL_DEBUG_LEVEL > 0
+    SAL_INFO("slideshow.opengl", "dispose " << this);
+    if( mnFrameCount ) {
+        m_EndTime = std::chrono::steady_clock::now();
+        auto const duration = m_EndTime - m_StartTime;
+        SAL_INFO("slideshow.opengl",
+                "whole transition (frames: " << mnFrameCount
+                << ") took: " << std::chrono::duration_cast<std::chrono::microseconds>(duration).count()
+                << " fps: "
+                << ((static_cast<double>(mnFrameCount)*1000000000.0)/std::chrono::duration_cast<std::chrono::nanoseconds>(duration).count())
+                << " time spent in updates: " << std::chrono::duration_cast<std::chrono::microseconds>(m_TotalUpdateDuration).count()
+                << " percentage of transition time: "
+                << (100*((static_cast<double>(std::chrono::duration_cast<std::chrono::nanoseconds>(m_TotalUpdateDuration).count()))/(static_cast<double>(std::chrono::duration_cast<std::chrono::nanoseconds>(duration).count()))))
+                << '%'
+            );
+    }
+#endif
+
+    if (mbRestoreSync && mpContext.is()) {
+        // try to reestablish synchronize state
+        const char* sal_synchronize = getenv("SAL_SYNCHRONIZE");
+        mpContext->getOpenGLWindow().Synchronize(sal_synchronize && *sal_synchronize == '1' );
+    }
+
+    impl_dispose();
+
+    mpTransition.reset();
+
+    mxLeavingBitmap.clear();
+    mxEnteringBitmap.clear();
+    mxView.clear();
+}
+
+OGLTransitionerImpl::OGLTransitionerImpl()
+    : OGLTransitionerImplBase(m_aMutex)
+    , mpContext()
+    , maLeavingSlideGL(0)
+    , maEnteringSlideGL(0)
+    , mxView()
+    , maEnteringBytes()
+    , maLeavingBytes()
+    , mbRestoreSync(false)
+    , maSlideBitmapLayout()
+    , maSlideSize()
+    , mbBrokenTexturesATI(false)
+    , mnGLVersion(0)
+    , mbValidOpenGLContext(false)
+#if OSL_DEBUG_LEVEL > 0
+    , mnFrameCount(0)
+#endif
+{
+}
+
+typedef cppu::WeakComponentImplHelper<presentation::XTransitionFactory, lang::XServiceInfo> OGLTransitionFactoryImplBase;
+
+class OGLTransitionFactoryImpl : private cppu::BaseMutex, public OGLTransitionFactoryImplBase
+{
+public:
+    explicit OGLTransitionFactoryImpl() :
+        OGLTransitionFactoryImplBase(m_aMutex)
+    {}
+
+    // XServiceInfo
+    virtual Sequence< OUString > SAL_CALL getSupportedServiceNames() override
+    {
+        return { "com.sun.star.presentation.TransitionFactory" };
+    }
+    virtual OUString SAL_CALL getImplementationName() override
+    {
+        return "com.sun.star.comp.presentation.OGLTransitionFactory";
+    }
+    virtual sal_Bool SAL_CALL supportsService(const OUString& aServiceName) override
+    {
+        return cppu::supportsService(this, aServiceName);
+    }
+
+    // XTransitionFactory
+    virtual sal_Bool SAL_CALL hasTransition( sal_Int16 transitionType, sal_Int16 transitionSubType ) override
+    {
+        if( !OpenGLHelper::supportsOpenGL())
+            return false;
+        // A set of css::animation::TransitionSubType that don't have any meaning (in the SMIL 2.0
+        // standard) for MISCSHAPEWIPE have been chosen to refer to some of these "fancy" optional
+        // transitions. (The only subtypes of 'miscShapeWipe' defined in the standard are 'heart'
+        // and 'keyhole'.) The set of subtypes used seems to be a bit random; it starts from the
+        // beginning of the list (in the order (numeric) in our TransitionSubType set of constants)
+        // but then jumps a bit randomly. The numeric values as such have no meaning, but still.
+
+        if( transitionType == animations::TransitionType::MISCSHAPEWIPE ) {
+            switch( transitionSubType )
+            {
+                case animations::TransitionSubType::LEFTTORIGHT:        //   1
+                case animations::TransitionSubType::TOPTOBOTTOM:        //   2
+                case animations::TransitionSubType::TOPLEFT:            //   3
+                case animations::TransitionSubType::TOPRIGHT:           //   4
+                case animations::TransitionSubType::BOTTOMRIGHT:        //   5
+                case animations::TransitionSubType::BOTTOMLEFT:         //   6
+                case animations::TransitionSubType::TOPCENTER:          //   7
+                case animations::TransitionSubType::RIGHTCENTER:        //   8
+                case animations::TransitionSubType::BOTTOMCENTER:       //   9
+                case animations::TransitionSubType::CORNERSIN:          //  11
+                case animations::TransitionSubType::CORNERSOUT:         //  12
+                case animations::TransitionSubType::VERTICAL:           //  13
+                case animations::TransitionSubType::HORIZONTAL:         //  14
+                case animations::TransitionSubType::DIAMOND:            //  26
+                case animations::TransitionSubType::CIRCLE:             //  27
+                case animations::TransitionSubType::HEART:              //  31
+                case animations::TransitionSubType::FANOUTHORIZONTAL:   //  55
+                case animations::TransitionSubType::ACROSS:             // 108
+                    return true;
+
+                default:
+                    return false;
+            }
+        } else if( transitionType == animations::TransitionType::FADE && transitionSubType == animations::TransitionSubType::CROSSFADE ) {
+            return true;
+        } else if( transitionType == animations::TransitionType::FADE && transitionSubType == animations::TransitionSubType::FADEOVERCOLOR ) {
+            return true;
+        } else if( transitionType == animations::TransitionType::IRISWIPE && transitionSubType == animations::TransitionSubType::DIAMOND ) {
+            return true;
+        } else if( transitionType == animations::TransitionType::ZOOM && transitionSubType == animations::TransitionSubType::ROTATEIN ) {
+            return true;
+        } else
+            return false;
+    }
+
+    virtual uno::Reference< presentation::XTransition > SAL_CALL createTransition(
+        sal_Int16                                             transitionType,
+        sal_Int16                                             transitionSubType,
+        sal_Int32                                             transitionFadeColor,
+        const uno::Reference< presentation::XSlideShowView >& view,
+        const uno::Reference< rendering::XBitmap >&           leavingBitmap,
+        const uno::Reference< rendering::XBitmap >&           enteringBitmap ) override
+    {
+        if( !hasTransition( transitionType, transitionSubType ) )
+            return uno::Reference< presentation::XTransition >();
+
+        rtl::Reference< OGLTransitionerImpl > xRes( new OGLTransitionerImpl() );
+        if ( !xRes->initialize( view, leavingBitmap, enteringBitmap ) )
+            return uno::Reference< presentation::XTransition >();
+
+        std::shared_ptr<OGLTransitionImpl> pTransition;
+
+        if( transitionType == animations::TransitionType::MISCSHAPEWIPE ) {
+            switch( transitionSubType )
+                {
+                case animations::TransitionSubType::LEFTTORIGHT:
+                    pTransition = makeFallLeaving();
+                    break;
+                case animations::TransitionSubType::TOPTOBOTTOM:
+                    pTransition = makeTurnAround();
+                    break;
+                case animations::TransitionSubType::TOPLEFT:
+                    pTransition = makeIris();
+                    break;
+                case animations::TransitionSubType::TOPRIGHT:
+                    pTransition = makeTurnDown();
+                    break;
+                case animations::TransitionSubType::BOTTOMRIGHT:
+                    pTransition = makeRochade();
+                    break;
+                case animations::TransitionSubType::BOTTOMLEFT:
+                    pTransition = makeVenetianBlinds( true, 8 );
+                    break;
+                case animations::TransitionSubType::TOPCENTER:
+                    pTransition = makeVenetianBlinds( false, 6 );
+                    break;
+                case animations::TransitionSubType::RIGHTCENTER:
+                    pTransition = makeStatic();
+                    break;
+                case animations::TransitionSubType::BOTTOMCENTER:
+                    pTransition = makeDissolve();
+                    break;
+                case animations::TransitionSubType::CORNERSIN:
+                    pTransition = makeInsideCubeFaceToLeft();
+                    break;
+                case animations::TransitionSubType::CORNERSOUT:
+                    pTransition = makeOutsideCubeFaceToLeft();
+                    break;
+                case animations::TransitionSubType::VERTICAL:
+                    pTransition = makeVortex();
+                    break;
+                case animations::TransitionSubType::HORIZONTAL:
+                    pTransition = makeRipple();
+                    break;
+                case animations::TransitionSubType::CIRCLE:
+                    pTransition = makeRevolvingCircles(8,128);
+                    break;
+                case animations::TransitionSubType::FANOUTHORIZONTAL:
+                    pTransition = makeHelix(20);
+                    break;
+                case animations::TransitionSubType::ACROSS:
+                    pTransition = makeNByMTileFlip(8,6);
+                    break;
+                case animations::TransitionSubType::DIAMOND:
+                    pTransition = makeGlitter();
+                    break;
+                case animations::TransitionSubType::HEART:
+                    pTransition = makeHoneycomb();
+                    break;
+                }
+        } else if( transitionType == animations::TransitionType::FADE && transitionSubType == animations::TransitionSubType::CROSSFADE ) {
+            pTransition = makeFadeSmoothly();
+        } else if( transitionType == animations::TransitionType::FADE && transitionSubType == animations::TransitionSubType::FADEOVERCOLOR ) {
+            pTransition = makeFadeThroughColor( transitionFadeColor == 0xffffff );
+        } else if( transitionType == animations::TransitionType::IRISWIPE && transitionSubType == animations::TransitionSubType::DIAMOND ) {
+            pTransition = makeDiamond();
+        } else if( transitionType == animations::TransitionType::ZOOM && transitionSubType == animations::TransitionSubType::ROTATEIN ) {
+            pTransition = makeNewsflash();
+        }
+
+        if ( !pTransition || !xRes->setTransition(pTransition) )
+            return uno::Reference< presentation::XTransition >();
+
+        return xRes;
+    }
+};
+
+}
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+slideshow_OGLTransitionFactoryImpl_get_implementation(
+    css::uno::XComponentContext* , css::uno::Sequence<css::uno::Any> const&)
+{
+    return cppu::acquire(new OGLTransitionFactoryImpl());
+}
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */