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

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 * This file is part of the LibreOffice project.

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 * 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 <sal/log.hxx>

#include <canvas/canvastools.hxx>

#include <comphelper/diagnose_ex.hxx>

#include <vcl/bitmap.hxx>

#include <vcl/BitmapTools.hxx>

#include <vcl/canvastools.hxx>

#include "canvasbitmap.hxx"

#include "canvasbitmaphelper.hxx"

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

namespace vclcanvas

{

    CanvasBitmapHelper::CanvasBitmapHelper()

    {

    }

    void CanvasBitmapHelper::init( const ::Bitmap&                rBitmap,

                                   rendering::XGraphicDevice&     rDevice,

                                   const OutDevProviderSharedPtr& rOutDevReference )

    {

        mpOutDevReference = rOutDevReference;

        mpBackBuffer = std::make_shared<BitmapBackBuffer>( rBitmap, rOutDevReference->getOutDev() );

        // forward new settings to base class (ref device, output

        // surface, no protection (own backbuffer), alpha depends on

        // whether BmpEx is transparent or not)

        CanvasHelper::init( rDevice,

                            mpBackBuffer,

                            false,

                            rBitmap.HasAlpha() );

    }

    void CanvasBitmapHelper::disposing()

    {

        mpBackBuffer.reset();

        mpOutDevReference.reset();

        // forward to base class

        CanvasHelper::disposing();

    }

    geometry::IntegerSize2D CanvasBitmapHelper::getSize() const

    {

        if( !mpBackBuffer )

            return geometry::IntegerSize2D();

        return vcl::unotools::integerSize2DFromSize( mpBackBuffer->getBitmapSizePixel() );

    }

    void CanvasBitmapHelper::clear()

    {

        // are we disposed?

        if( mpBackBuffer )

            mpBackBuffer->clear(); // alpha vdev needs special treatment

    }

    uno::Reference< rendering::XBitmap > CanvasBitmapHelper::getScaledBitmap( const geometry::RealSize2D&   newSize,

                                                                              bool                          beFast )

    {

        ENSURE_OR_THROW( mpDevice,

                          "disposed CanvasHelper" );

        SAL_INFO( "canvas.vcl", "::vclcanvas::CanvasBitmapHelper::getScaledBitmap()" );

        if( !mpBackBuffer || mpDevice )

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

        ::Bitmap aRes( mpBackBuffer->getBitmapReference() );

        aRes.Scale( vcl::unotools::sizeFromRealSize2D(newSize),

                     beFast ? BmpScaleFlag::Default : BmpScaleFlag::BestQuality );

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

            new CanvasBitmap( aRes, *mpDevice, mpOutDevReference ) );

    }

    uno::Sequence< sal_Int8 > CanvasBitmapHelper::getData( rendering::IntegerBitmapLayout&      rLayout,

                                                           const geometry::IntegerRectangle2D&  rect )

    {

        SAL_INFO( "canvas.vcl", "::vclcanvas::CanvasBitmapHelper::getData()" );

        if( !mpBackBuffer )

            return uno::Sequence< sal_Int8 >(); // we're disposed

        rLayout = getMemoryLayout();

        // TODO(F1): Support more formats.

        const Size aBmpSize( mpBackBuffer->getBitmapReference().GetSizePixel() );

        rLayout.ScanLines = aBmpSize.Height();

        rLayout.ScanLineBytes = aBmpSize.Width()*4;

        rLayout.ScanLineStride = rLayout.ScanLineBytes;

        uno::Sequence< sal_Int8 > aRes = vcl::bitmap::CanvasExtractBitmapData(mpBackBuffer->getBitmapReference(), rect);

        return aRes;

    }

    uno::Sequence< sal_Int8 > CanvasBitmapHelper::getPixel( rendering::IntegerBitmapLayout& rLayout,

                                                            const geometry::IntegerPoint2D& pos )

    {

        SAL_INFO( "canvas.vcl", "::vclcanvas::CanvasBitmapHelper::getPixel()" );

        if( !mpBackBuffer )

            return uno::Sequence< sal_Int8 >(); // we're disposed

        rLayout = getMemoryLayout();

        rLayout.ScanLines = 1;

        rLayout.ScanLineBytes = 4;

        rLayout.ScanLineStride = rLayout.ScanLineBytes;

        const Size aBmpSize( mpBackBuffer->getBitmapReference().GetSizePixel() );

        ENSURE_ARG_OR_THROW( pos.X >= 0 && pos.X < aBmpSize.Width(),

                         "X coordinate out of bounds" );

        ENSURE_ARG_OR_THROW( pos.Y >= 0 && pos.Y < aBmpSize.Height(),

                         "Y coordinate out of bounds" );

        ::Color aColor = mpBackBuffer->getBitmapReference().GetPixelColor(pos.X, pos.Y);

        uno::Sequence< sal_Int8 > aRes( 4 );

        sal_Int8* pRes = aRes.getArray();

        pRes[ 0 ] = aColor.GetRed();

        pRes[ 1 ] = aColor.GetGreen();

        pRes[ 2 ] = aColor.GetBlue();

        pRes[ 3 ] = aColor.GetAlpha();

        return aRes;

    }

    rendering::IntegerBitmapLayout CanvasBitmapHelper::getMemoryLayout() const

    {

        if( !mpOutDevProvider )

            return rendering::IntegerBitmapLayout(); // we're disposed

        rendering::IntegerBitmapLayout aBitmapLayout( ::canvastools::getStdMemoryLayout(getSize()) );

        if ( !hasAlpha() )

            aBitmapLayout.ColorSpace = canvastools::getStdColorSpaceWithoutAlpha();

        return aBitmapLayout;

    }

    ::Bitmap CanvasBitmapHelper::getBitmap() const

    {

        if( !mpBackBuffer )

            return ::Bitmap(); // we're disposed

        else

            return mpBackBuffer->getBitmapReference();

    }

}

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