slideshow/source/engine/slidebitmap.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20
  21 #include <tools/diagnose_ex.h>
  22 #include <slidebitmap.hxx>
  23
  24 #include <com/sun/star/rendering/XCanvas.hpp>
  25 #include <com/sun/star/rendering/XBitmap.hpp>
  26 #include <comphelper/anytostring.hxx>
  27 #include <cppuhelper/exc_hlp.hxx>
  28
  29 #include <basegfx/matrix/b2dhommatrix.hxx>
  30 #include <basegfx/matrix/b2dhommatrixtools.hxx>
  31
  32 #include <canvas/canvastools.hxx>
  33 #include <basegfx/utils/canvastools.hxx>
  34
  35
  36 using namespace ::com::sun::star;
  37
  38 namespace slideshow
  39 {
  40     namespace internal
  41     {
  42
  43         SlideBitmap::SlideBitmap( const ::cppcanvas::BitmapSharedPtr& rBitmap ) :
  44             maOutputPos(),
  45             maClipPoly(),
  46             mxBitmap()
  47         {
  48             if( rBitmap )
  49                 mxBitmap = rBitmap->getUNOBitmap();
  50
  51             ENSURE_OR_THROW( mxBitmap.is(), "SlideBitmap::SlideBitmap(): Invalid bitmap" );
  52         }
  53
  54         bool SlideBitmap::draw( const ::cppcanvas::CanvasSharedPtr& rCanvas ) const
  55         {
  56             ENSURE_OR_RETURN_FALSE( rCanvas && rCanvas->getUNOCanvas().is(),
  57                                "SlideBitmap::draw(): Invalid canvas" );
  58
  59             // selectively only copy the transformation from current viewstate,
  60             // don't want no clipping here.
  61             rendering::ViewState aViewState;
  62             aViewState.AffineTransform = rCanvas->getViewState().AffineTransform;
  63
  64             rendering::RenderState aRenderState;
  65             ::canvas::tools::initRenderState( aRenderState );
  66
  67             const basegfx::B2DHomMatrix aTranslation(basegfx::utils::createTranslateB2DHomMatrix(maOutputPos));
  68             ::canvas::tools::setRenderStateTransform( aRenderState, aTranslation );
  69
  70             try
  71             {
  72                 if( maClipPoly.count() )
  73                 {
  74                     // TODO(P1): Buffer the clip polygon
  75                     aRenderState.Clip =
  76                         ::basegfx::unotools::xPolyPolygonFromB2DPolyPolygon(
  77                             rCanvas->getUNOCanvas()->getDevice(),
  78                             maClipPoly );
  79                 }
  80
  81                 rCanvas->getUNOCanvas()->drawBitmap( mxBitmap,
  82                                                      aViewState,
  83                                                      aRenderState );
  84             }
  85             catch( uno::Exception& )
  86             {
  87                 SAL_WARN( "slideshow", comphelper::anyToString( cppu::getCaughtException() ) );
  88                 return false;
  89             }
  90
  91             return true;
  92         }
  93
  94         ::basegfx::B2ISize SlideBitmap::getSize() const
  95         {
  96             return ::basegfx::unotools::b2ISizeFromIntegerSize2D( mxBitmap->getSize() );
  97         }
  98
  99         void SlideBitmap::move( const ::basegfx::B2DPoint& rNewPos )
 100         {
 101             maOutputPos = rNewPos;
 102         }
 103
 104         void SlideBitmap::clip( const ::basegfx::B2DPolyPolygon& rClipPoly )
 105         {
 106             maClipPoly = rClipPoly;
 107         }
 108
 109         const css::uno::Reference< css::rendering::XBitmap >&  SlideBitmap::getXBitmap()
 110         {
 111         return mxBitmap;
 112         }
 113
 114     }
 115 }
 116
 117 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */