    /* -*- 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 <sal/log.hxx>

    #include <algorithm>

    #include <basegfx/matrix/b2dhommatrix.hxx>
    #include <basegfx/point/b2dpoint.hxx>
    #include <basegfx/utils/canvastools.hxx>
    #include <com/sun/star/rendering/CompositeOperation.hpp>
    #include <com/sun/star/rendering/PathCapType.hpp>
    #include <com/sun/star/rendering/PathJoinType.hpp>
    #include <com/sun/star/rendering/RepaintResult.hpp>
    #include <com/sun/star/rendering/TexturingMode.hpp>
    #include <rtl/math.hxx>
    #include <tools/diagnose_ex.h>

    #include <canvas/canvastools.hxx>

    #include "dx_bitmapcanvashelper.hxx"
    #include "dx_canvasfont.hxx"
    #include "dx_impltools.hxx"
    #include "dx_spritecanvas.hxx"
    #include "dx_textlayout.hxx"

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

    namespace dxcanvas
    {
        BitmapCanvasHelper::BitmapCanvasHelper() :
            mpTarget()
        {}

        void BitmapCanvasHelper::disposing()
        {
            mpTarget.reset();
            CanvasHelper::disposing();
        }

        void BitmapCanvasHelper::setTarget( const IBitmapSharedPtr& rTarget )
        {
            ENSURE_OR_THROW( rTarget,
                              "BitmapCanvasHelper::setTarget(): Invalid target" );
            ENSURE_OR_THROW( !mpTarget.get(),
                              "BitmapCanvasHelper::setTarget(): target set, old target would be overwritten" );

            mpTarget = rTarget;
            CanvasHelper::setTarget(rTarget);
        }

        void BitmapCanvasHelper::setTarget( const IBitmapSharedPtr&   rTarget,
                                            const ::basegfx::B2ISize& rOutputOffset )
        {
            ENSURE_OR_THROW( rTarget,
                             "BitmapCanvasHelper::setTarget(): invalid target" );
            ENSURE_OR_THROW( !mpTarget.get(),
                             "BitmapCanvasHelper::setTarget(): target set, old target would be overwritten" );

            mpTarget = rTarget;
            CanvasHelper::setTarget(rTarget,rOutputOffset);
        }

        void BitmapCanvasHelper::clear()
        {
            if( needOutput() )
            {
                GraphicsSharedPtr pGraphics( mpTarget->getGraphics() );

                Gdiplus::Color aClearColor = hasAlpha() ?
                    Gdiplus::Color( 0,255,255,255 ) : Gdiplus::Color(Gdiplus::ARGB(Gdiplus::Color::White));

                ENSURE_OR_THROW(
                    Gdiplus::Ok == pGraphics->SetCompositingMode(
                        Gdiplus::CompositingModeSourceCopy ), // force set, don't blend
                    "BitmapCanvasHelper::clear(): GDI+ SetCompositingMode call failed" );
                ENSURE_OR_THROW(
                    Gdiplus::Ok == pGraphics->Clear( aClearColor ),
                    "BitmapCanvasHelper::clear(): GDI+ Clear call failed" );
            }
        }

        uno::Reference< rendering::XCachedPrimitive > BitmapCanvasHelper::drawTextLayout( const rendering::XCanvas*                       /*pCanvas*/,
                                                                                          const uno::Reference< rendering::XTextLayout >& xLayoutetText,
                                                                                          const rendering::ViewState&                     viewState,
                                                                                          const rendering::RenderState&                   renderState )
        {
            ENSURE_OR_THROW( xLayoutetText.is(),
                              "BitmapCanvasHelper::drawTextLayout: layout is NULL");

            if( needOutput() )
            {
                TextLayout* pTextLayout =
                    dynamic_cast< TextLayout* >( xLayoutetText.get() );

                ENSURE_OR_THROW( pTextLayout,
                                    "BitmapCanvasHelper::drawTextLayout(): TextLayout not compatible with this canvas" );

                pTextLayout->draw( mpTarget->getGraphics(),
                                   viewState,
                                   renderState,
                                   maOutputOffset,
                                   mpDevice,
                                   mpTarget->hasAlpha() );
            }

            return uno::Reference< rendering::XCachedPrimitive >(nullptr);
        }

        void BitmapCanvasHelper::copyRect( const rendering::XCanvas*                            /*pCanvas*/,
                                           const uno::Reference< rendering::XBitmapCanvas >&    /*sourceCanvas*/,
                                           const geometry::RealRectangle2D&                     /*sourceRect*/,
                                           const rendering::ViewState&                          /*sourceViewState*/,
                                           const rendering::RenderState&                        /*sourceRenderState*/,
                                           const geometry::RealRectangle2D&                     /*destRect*/,
                                           const rendering::ViewState&                          /*destViewState*/,
                                           const rendering::RenderState&                        /*destRenderState*/ )
        {
            // TODO(F2): copyRect NYI
        }

        geometry::IntegerSize2D BitmapCanvasHelper::getSize()
        {
            if( !mpTarget )
                return geometry::IntegerSize2D(1, 1);

            return basegfx::unotools::integerSize2DFromB2ISize(mpTarget->getSize());
        }

        uno::Reference< rendering::XBitmap > BitmapCanvasHelper::getScaledBitmap( const geometry::RealSize2D& /*newSize*/,
                                                                                  bool                        /*beFast*/ )
        {
            // TODO(F1):
            return uno::Reference< rendering::XBitmap >();
        }

        uno::Sequence< sal_Int8 > BitmapCanvasHelper::getData( rendering::IntegerBitmapLayout&     bitmapLayout,
                                                               const geometry::IntegerRectangle2D& rect )
        {
            SAL_INFO( "canvas.directx", "::dxcanvas::BitmapCanvasHelper::getData()" );

            ENSURE_OR_THROW( mpTarget,
                              "::dxcanvas::BitmapCanvasHelper::getData(): disposed" );

            if( !mpTarget )
                return uno::Sequence< sal_Int8 >();

            bitmapLayout = getMemoryLayout();
            return mpTarget->getData(bitmapLayout,rect);
        }

        void BitmapCanvasHelper::setData( const uno::Sequence< sal_Int8 >&      data,
                                          const rendering::IntegerBitmapLayout& bitmapLayout,
                                          const geometry::IntegerRectangle2D&   rect )
        {
            SAL_INFO( "canvas.directx", "::dxcanvas::BitmapCanvasHelper::setData()" );

            ENSURE_OR_THROW( mpTarget,
                              "::dxcanvas::BitmapCanvasHelper::setData(): disposed" );

            if( !mpTarget )
                return;

            mpTarget->setData(data,bitmapLayout,rect);
        }

        void BitmapCanvasHelper::setPixel( const uno::Sequence< sal_Int8 >&       color,
                                           const rendering::IntegerBitmapLayout&  bitmapLayout,
                                           const geometry::IntegerPoint2D&        pos )
        {
            SAL_INFO( "canvas.directx", "::dxcanvas::BitmapCanvasHelper::setPixel()" );

            ENSURE_OR_THROW( mpTarget,
                              "::dxcanvas::BitmapCanvasHelper::setPixel(): disposed" );

            if( !mpTarget )
                return;

            mpTarget->setPixel(color,bitmapLayout,pos);
        }

        uno::Sequence< sal_Int8 > BitmapCanvasHelper::getPixel( rendering::IntegerBitmapLayout&   bitmapLayout,
                                                                const geometry::IntegerPoint2D&   pos )
        {
            SAL_INFO( "canvas.directx", "::dxcanvas::BitmapCanvasHelper::getPixel()" );

            ENSURE_OR_THROW( mpTarget,
                              "::dxcanvas::BitmapCanvasHelper::getPixel(): disposed" );

            if( !mpTarget )
                return uno::Sequence< sal_Int8 >();

            bitmapLayout = getMemoryLayout();
            return mpTarget->getPixel(bitmapLayout,pos);
        }

        uno::Reference< rendering::XBitmapPalette > BitmapCanvasHelper::getPalette()
        {
            // TODO(F1): Palette bitmaps NYI
            return uno::Reference< rendering::XBitmapPalette >();
        }

        rendering::IntegerBitmapLayout BitmapCanvasHelper::getMemoryLayout()
        {
            if( !mpTarget )
                return rendering::IntegerBitmapLayout(); // we're disposed

            return ::canvas::tools::getStdMemoryLayout(getSize());
        }
        bool BitmapCanvasHelper::hasAlpha() const
        {
            return mpTarget && mpTarget->hasAlpha();
        }
    }

    /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

↑ V547 Expression '!mpTarget' is always false.

↑ V547 Expression '!mpTarget' is always false.

↑ V547 Expression '!mpTarget' is always false.

↑ V547 Expression '!mpTarget' is always false.