cairo_devicehelper.cxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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#include <sal/config.h>
#include <sal/log.hxx>
 
#include <basegfx/utils/canvastools.hxx>
#include <basegfx/utils/unopolypolygon.hxx>
#include <tools/stream.hxx>
#include <vcl/bitmapex.hxx>
#include <vcl/canvastools.hxx>
#include <vcl/dibtools.hxx>
 
#include <canvas/canvastools.hxx>
 
#include "cairo_canvasbitmap.hxx"
#include "cairo_devicehelper.hxx"
 
using namespace ::cairo;
using namespace ::com::sun::star;
 
namespace cairocanvas
{
    DeviceHelper::DeviceHelper() :
        mpSurfaceProvider( nullptr ),
        mpRefDevice( nullptr )
    {
    }
 
    void DeviceHelper::implInit( SurfaceProvider& rSurfaceProvider,
                                 OutputDevice&    rRefDevice )
    {
        mpSurfaceProvider = &rSurfaceProvider;
        mpRefDevice = &rRefDevice;
 
        // no own surface, this is handled by derived classes
    }
 
    void DeviceHelper::init( SurfaceProvider& rSurfaceProvider,
                             OutputDevice&    rRefDevice )
    {
        implInit(rSurfaceProvider, rRefDevice);
 
        OutputDevice* pOutDev = getOutputDevice();
        mpSurface = pOutDev->CreateSurface(pOutDev->GetOutOffXPixel(),
                                           pOutDev->GetOutOffYPixel(),
                                           pOutDev->GetOutputWidthPixel(),
                                           pOutDev->GetOutputHeightPixel());
    }
 
    void DeviceHelper::disposing()
    {
        // release all references
        mpSurface.reset();
        mpRefDevice = nullptr;
        mpSurfaceProvider = nullptr;
    }
 
    void DeviceHelper::setSize( const ::basegfx::B2ISize& rSize )
    {
        SAL_INFO(
            "canvas.cairo",
            "device size " << rSize.getX() << " x " << rSize.getY());
 
        if( !mpRefDevice )
            return; // disposed
 
        OutputDevice* pOutDev = getOutputDevice();
 
        // X11 only
        bool bReuseSurface = mpSurface &&
                             mpSurface->Resize(rSize.getX() + pOutDev->GetOutOffXPixel(),
                                               rSize.getY() + pOutDev->GetOutOffYPixel());
 
        if (!bReuseSurface)
        {
            mpSurface = pOutDev->CreateSurface(
                pOutDev->GetOutOffXPixel(),
                pOutDev->GetOutOffYPixel(),
                rSize.getX(), rSize.getY() );
        }
    }
 
    geometry::RealSize2D DeviceHelper::getPhysicalResolution()
    {
        // Map a one-by-one millimeter box to pixel
        const MapMode aOldMapMode( mpRefDevice->GetMapMode() );
        mpRefDevice->SetMapMode( MapMode(MapUnit::MapMM) );
        const Size aPixelSize( mpRefDevice->LogicToPixel(Size(1,1)) );
        mpRefDevice->SetMapMode( aOldMapMode );
 
        return vcl::unotools::size2DFromSize( aPixelSize );
    }
 
    geometry::RealSize2D DeviceHelper::getPhysicalSize()
    {
        if( !mpRefDevice )
            return ::canvas::tools::createInfiniteSize2D(); // we're disposed
 
        // Map the pixel dimensions of the output window to millimeter
        const MapMode aOldMapMode( mpRefDevice->GetMapMode() );
        mpRefDevice->SetMapMode( MapMode(MapUnit::MapMM) );
        const Size aLogSize( mpRefDevice->PixelToLogic(mpRefDevice->GetOutputSizePixel()) );
        mpRefDevice->SetMapMode( aOldMapMode );
 
        return vcl::unotools::size2DFromSize( aLogSize );
    }
 
    uno::Reference< rendering::XLinePolyPolygon2D > DeviceHelper::createCompatibleLinePolyPolygon(
        const uno::Reference< rendering::XGraphicDevice >&              ,
        const uno::Sequence< uno::Sequence< geometry::RealPoint2D > >&  points )
    {
        // disposed?
        if( !mpSurfaceProvider )
            return uno::Reference< rendering::XLinePolyPolygon2D >(); // we're disposed
 
        return uno::Reference< rendering::XLinePolyPolygon2D >(
            new ::basegfx::unotools::UnoPolyPolygon(
                ::basegfx::unotools::polyPolygonFromPoint2DSequenceSequence( points ) ) );
    }
 
    uno::Reference< rendering::XBezierPolyPolygon2D > DeviceHelper::createCompatibleBezierPolyPolygon(
        const uno::Reference< rendering::XGraphicDevice >&                      ,
        const uno::Sequence< uno::Sequence< geometry::RealBezierSegment2D > >&  points )
    {
        // disposed?
        if( !mpSurfaceProvider )
            return uno::Reference< rendering::XBezierPolyPolygon2D >(); // we're disposed
 
        return uno::Reference< rendering::XBezierPolyPolygon2D >(
            new ::basegfx::unotools::UnoPolyPolygon(
                ::basegfx::unotools::polyPolygonFromBezier2DSequenceSequence( points ) ) );
    }
 
    uno::Reference< rendering::XBitmap > DeviceHelper::createCompatibleBitmap(
        const uno::Reference< rendering::XGraphicDevice >&  rDevice,
        const geometry::IntegerSize2D&                      size )
    {
        // disposed?
        if( !mpSurfaceProvider )
            return uno::Reference< rendering::XBitmap >(); // we're disposed
 
        return uno::Reference< rendering::XBitmap >(
            new CanvasBitmap(
                ::basegfx::unotools::b2ISizeFromIntegerSize2D( size ),
                SurfaceProviderRef(mpSurfaceProvider),
                rDevice.get(),
                false ));
    }
 
    uno::Reference< rendering::XVolatileBitmap > DeviceHelper::createVolatileBitmap(
        const uno::Reference< rendering::XGraphicDevice >&  ,
        const geometry::IntegerSize2D&                      /*size*/ )
    {
        return uno::Reference< rendering::XVolatileBitmap >();
    }
 
    uno::Reference< rendering::XBitmap > DeviceHelper::createCompatibleAlphaBitmap(
        const uno::Reference< rendering::XGraphicDevice >&  rDevice,
        const geometry::IntegerSize2D&                      size )
    {
        // disposed?
        if( !mpSurfaceProvider )
            return uno::Reference< rendering::XBitmap >(); // we're disposed
 
        return uno::Reference< rendering::XBitmap >(
            new CanvasBitmap(
                ::basegfx::unotools::b2ISizeFromIntegerSize2D( size ),
                SurfaceProviderRef(mpSurfaceProvider),
                rDevice.get(),
                true ));
    }
 
    uno::Reference< rendering::XVolatileBitmap > DeviceHelper::createVolatileAlphaBitmap(
        const uno::Reference< rendering::XGraphicDevice >&  ,
        const geometry::IntegerSize2D&                      /*size*/ )
    {
        return uno::Reference< rendering::XVolatileBitmap >();
    }
 
    uno::Any DeviceHelper::isAccelerated() const
    {
        return css::uno::Any(false);
    }
 
    uno::Any DeviceHelper::getDeviceHandle() const
    {
        return uno::Any( reinterpret_cast< sal_Int64 >(mpRefDevice.get()) );
    }
 
    uno::Any DeviceHelper::getSurfaceHandle() const
    {
        return uno::Any();
    }
 
    uno::Reference<rendering::XColorSpace> const & DeviceHelper::getColorSpace() const
    {
        static uno::Reference<rendering::XColorSpace> SPACE = vcl::unotools::createStandardColorSpace();
        // always the same
        return SPACE;
    }
 
    void DeviceHelper::dumpScreenContent() const
    {
        static sal_Int32 nFilePostfixCount(0);
 
        if( !mpRefDevice )
            return;
 
        OUString aFilename = "dbg_frontbuffer" + OUString::number(nFilePostfixCount) + ".bmp";
 
        SvFileStream aStream( aFilename, StreamMode::STD_READWRITE );
 
        const ::Point aEmptyPoint;
        bool bOldMap( mpRefDevice->IsMapModeEnabled() );
        mpRefDevice->EnableMapMode( false );
        const ::BitmapEx aTempBitmap(mpRefDevice->GetBitmapEx(aEmptyPoint, mpRefDevice->GetOutputSizePixel()));
        WriteDIB(aTempBitmap, aStream, false);
        mpRefDevice->EnableMapMode( bOldMap );
 
        ++nFilePostfixCount;
    }
 
    SurfaceSharedPtr DeviceHelper::createSurface( const ::basegfx::B2ISize& rSize, int aContent )
    {
        if( mpSurface )
            return mpSurface->getSimilar( aContent, rSize.getX(), rSize.getY() );
 
        return SurfaceSharedPtr();
    }
 
    SurfaceSharedPtr DeviceHelper::createSurface( BitmapSystemData const & rData, const Size& rSize )
    {
        if (mpRefDevice)
            return mpRefDevice->CreateBitmapSurface(rData, rSize);
 
        return SurfaceSharedPtr();
    }
}
 
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