/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/*

 * This file is part of the LibreOffice project.

 *

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/.

 *

 * This file incorporates work covered by the following license notice:

 *

 *   Licensed to the Apache Software Foundation (ASF) under one or more

 *   contributor license agreements. See the NOTICE file distributed

 *   with this work for additional information regarding copyright

 *   ownership. The ASF licenses this file to you under the Apache

 *   License, Version 2.0 (the "License"); you may not use this file

 *   except in compliance with the License. You may obtain a copy of

 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .

 */

#include <sal/config.h>

#include <basegfx/utils/canvastools.hxx>

#include <basegfx/utils/unopolypolygon.hxx>

#include <canvas/canvastools.hxx>

#include <tools/mapunit.hxx>

#include <tools/stream.hxx>

#include <vcl/canvastools.hxx>

#include <vcl/dibtools.hxx>

#include "canvasbitmap.hxx"

#include "devicehelper.hxx"

using namespace ::com::sun::star;

namespace vclcanvas

{

    DeviceHelper::DeviceHelper()

    {}

    void DeviceHelper::init( const OutDevProviderSharedPtr& rOutDev )

    {

        mpOutDev = rOutDev;

    }

    geometry::RealSize2D DeviceHelper::getPhysicalResolution()

    {

        if( !mpOutDev )

            return ::canvastools::createInfiniteSize2D(); // we're disposed

        // Map a one-by-one millimeter box to pixel

        OutputDevice& rOutDev = mpOutDev->getOutDev();

        const MapMode aOldMapMode( rOutDev.GetMapMode() );

        rOutDev.SetMapMode( MapMode(MapUnit::MapMM) );

        const Size aPixelSize( rOutDev.LogicToPixel(Size(1,1)) );

        rOutDev.SetMapMode( aOldMapMode );

        return vcl::unotools::size2DFromSize( aPixelSize );

    }

    geometry::RealSize2D DeviceHelper::getPhysicalSize()

    {

        if( !mpOutDev )

            return ::canvastools::createInfiniteSize2D(); // we're disposed

        // Map the pixel dimensions of the output window to millimeter

        OutputDevice& rOutDev = mpOutDev->getOutDev();

        const MapMode aOldMapMode( rOutDev.GetMapMode() );

        rOutDev.SetMapMode( MapMode(MapUnit::MapMM) );

        const Size aLogSize( rOutDev.PixelToLogic(rOutDev.GetOutputSizePixel()) );

        rOutDev.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 )

    {

        uno::Reference< rendering::XLinePolyPolygon2D > xPoly;

        if( !mpOutDev )

            return xPoly; // we're disposed

        xPoly.set( new ::basegfx::unotools::UnoPolyPolygon(

                       ::basegfx::unotools::polyPolygonFromPoint2DSequenceSequence( points ) ) );

        // vcl only handles even_odd polygons

        xPoly->setFillRule(rendering::FillRule_EVEN_ODD);

        return xPoly;

    }

    uno::Reference< rendering::XBezierPolyPolygon2D > DeviceHelper::createCompatibleBezierPolyPolygon(

        const uno::Reference< rendering::XGraphicDevice >&                      ,

        const uno::Sequence< uno::Sequence< geometry::RealBezierSegment2D > >&  points )

    {

        uno::Reference< rendering::XBezierPolyPolygon2D > xPoly;

        if( !mpOutDev )

            return xPoly; // we're disposed

        xPoly.set( new ::basegfx::unotools::UnoPolyPolygon(

                       ::basegfx::unotools::polyPolygonFromBezier2DSequenceSequence( points ) ) );

        // vcl only handles even_odd polygons

        xPoly->setFillRule(rendering::FillRule_EVEN_ODD);

        return xPoly;

    }

    uno::Reference< rendering::XBitmap > DeviceHelper::createCompatibleBitmap(

        const uno::Reference< rendering::XGraphicDevice >& rDevice,

        const geometry::IntegerSize2D&                     size )

    {

        if( !mpOutDev )

            return uno::Reference< rendering::XBitmap >(); // we're disposed

        return uno::Reference< rendering::XBitmap >(

            new CanvasBitmap( vcl::unotools::sizeFromIntegerSize2D(size),

                              false,

                              *rDevice,

                              mpOutDev ) );

    }

    uno::Reference< rendering::XVolatileBitmap > DeviceHelper::createVolatileBitmap(

        const uno::Reference< rendering::XGraphicDevice >&  ,

        const geometry::IntegerSize2D&                       )

    {

        return uno::Reference< rendering::XVolatileBitmap >();

    }

    uno::Reference< rendering::XBitmap > DeviceHelper::createCompatibleAlphaBitmap(

        const uno::Reference< rendering::XGraphicDevice >& rDevice,

        const geometry::IntegerSize2D&                     size )

    {

        if( !mpOutDev )

            return uno::Reference< rendering::XBitmap >(); // we're disposed

        return uno::Reference< rendering::XBitmap >(

            new CanvasBitmap( vcl::unotools::sizeFromIntegerSize2D(size),

                              true,

                              *rDevice,

                              mpOutDev ) );

    }

    uno::Reference< rendering::XVolatileBitmap > DeviceHelper::createVolatileAlphaBitmap(

        const uno::Reference< rendering::XGraphicDevice >&  ,

        const geometry::IntegerSize2D&                       )

    {

        return uno::Reference< rendering::XVolatileBitmap >();

    }

    void DeviceHelper::disposing()

    {

        // release all references

        mpOutDev.reset();

    }

    uno::Any DeviceHelper::isAccelerated() const

    {

        return css::uno::Any(false);

    }

    uno::Any DeviceHelper::getDeviceHandle() const

    {

        if( !mpOutDev )

            return uno::Any();

        return uno::Any(

            reinterpret_cast< sal_Int64 >(&mpOutDev->getOutDev()) );

    }

    uno::Any DeviceHelper::getSurfaceHandle() const

    {

        return getDeviceHandle();

    }

    namespace

    {

        uno::Reference<rendering::XColorSpace>& GetDeviceColorSpace()

        {

            static uno::Reference<rendering::XColorSpace> xColorSpace =

            []()

            {

                auto xTmp = canvastools::getStdColorSpace();

                assert( xTmp.is() );

                return xTmp;

            }();

            return xColorSpace;

        };

    }

    uno::Reference<rendering::XColorSpace> const & DeviceHelper::getColorSpace() const

    {

        // always the same

        return GetDeviceColorSpace();

    }

    void DeviceHelper::dumpScreenContent() const

    {

        static sal_Int32 nFilePostfixCount(0);

        if( !mpOutDev )

            return;

        OUString aFilename = "dbg_frontbuffer" + OUString::number(nFilePostfixCount) + ".bmp";

        SvFileStream aStream( aFilename, StreamMode::STD_READWRITE );

        const ::Point aEmptyPoint;

        OutputDevice& rOutDev = mpOutDev->getOutDev();

        bool bOldMap( rOutDev.IsMapModeEnabled() );

        rOutDev.EnableMapMode( false );

        WriteDIB(rOutDev.GetBitmap(aEmptyPoint, rOutDev.GetOutputSizePixel()), aStream, false);

        rOutDev.EnableMapMode( bOldMap );

        ++nFilePostfixCount;

    }

}

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