canvas/source/vcl/canvasbitmaphelper.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.
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   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 #include <sal/config.h>
  21 #include <sal/log.hxx>
  22
  23 #include <canvas/canvastools.hxx>
  24 #include <comphelper/diagnose_ex.hxx>
  25 #include <vcl/bitmapex.hxx>
  26 #include <vcl/BitmapTools.hxx>
  27 #include <vcl/canvastools.hxx>
  28
  29 #include "canvasbitmap.hxx"
  30 #include "canvasbitmaphelper.hxx"
  31
  32
  33 using namespace ::com::sun::star;
  34
  35 namespace vclcanvas
  36 {
  37     CanvasBitmapHelper::CanvasBitmapHelper()
  38     {
  39     }
  40
  41     void CanvasBitmapHelper::init( const BitmapEx&                rBitmap,
  42                                    rendering::XGraphicDevice&     rDevice,
  43                                    const OutDevProviderSharedPtr& rOutDevReference )
  44     {
  45         mpOutDevReference = rOutDevReference;
  46         mpBackBuffer = std::make_shared<BitmapBackBuffer>( rBitmap, rOutDevReference->getOutDev() );
  47
  48         // forward new settings to base class (ref device, output
  49         // surface, no protection (own backbuffer), alpha depends on
  50         // whether BmpEx is transparent or not)
  51         CanvasHelper::init( rDevice,
  52                             mpBackBuffer,
  53                             false,
  54                             rBitmap.IsAlpha() );
  55     }
  56
  57     void CanvasBitmapHelper::disposing()
  58     {
  59         mpBackBuffer.reset();
  60         mpOutDevReference.reset();
  61
  62         // forward to base class
  63         CanvasHelper::disposing();
  64     }
  65
  66     geometry::IntegerSize2D CanvasBitmapHelper::getSize() const
  67     {
  68         if( !mpBackBuffer )
  69             return geometry::IntegerSize2D();
  70
  71         return vcl::unotools::integerSize2DFromSize( mpBackBuffer->getBitmapSizePixel() );
  72     }
  73
  74     void CanvasBitmapHelper::clear()
  75     {
  76         // are we disposed?
  77         if( mpBackBuffer )
  78             mpBackBuffer->clear(); // alpha vdev needs special treatment
  79     }
  80
  81     uno::Reference< rendering::XBitmap > CanvasBitmapHelper::getScaledBitmap( const geometry::RealSize2D&   newSize,
  82                                                                               bool                          beFast )
  83     {
  84         ENSURE_OR_THROW( mpDevice,
  85                           "disposed CanvasHelper" );
  86
  87         SAL_INFO( "canvas.vcl", "::vclcanvas::CanvasBitmapHelper::getScaledBitmap()" );
  88
  89         if( !mpBackBuffer || mpDevice )
  90             return uno::Reference< rendering::XBitmap >(); // we're disposed
  91
  92         BitmapEx aRes( mpBackBuffer->getBitmapReference() );
  93
  94         aRes.Scale( vcl::unotools::sizeFromRealSize2D(newSize),
  95                      beFast ? BmpScaleFlag::Default : BmpScaleFlag::BestQuality );
  96
  97         return uno::Reference< rendering::XBitmap >(
  98             new CanvasBitmap( aRes, *mpDevice, mpOutDevReference ) );
  99     }
 100
 101     uno::Sequence< sal_Int8 > CanvasBitmapHelper::getData( rendering::IntegerBitmapLayout&      rLayout,
 102                                                            const geometry::IntegerRectangle2D&  rect )
 103     {
 104         SAL_INFO( "canvas.vcl", "::vclcanvas::CanvasBitmapHelper::getData()" );
 105
 106         if( !mpBackBuffer )
 107             return uno::Sequence< sal_Int8 >(); // we're disposed
 108
 109         rLayout = getMemoryLayout();
 110
 111         // TODO(F1): Support more formats.
 112         const Size aBmpSize( mpBackBuffer->getBitmapReference().GetSizePixel() );
 113
 114         rLayout.ScanLines = aBmpSize.Height();
 115         rLayout.ScanLineBytes = aBmpSize.Width()*4;
 116         rLayout.ScanLineStride = rLayout.ScanLineBytes;
 117
 118         uno::Sequence< sal_Int8 > aRes = vcl::bitmap::CanvasExtractBitmapData(mpBackBuffer->getBitmapReference(), rect);
 119         return aRes;
 120     }
 121
 122     uno::Sequence< sal_Int8 > CanvasBitmapHelper::getPixel( rendering::IntegerBitmapLayout& rLayout,
 123                                                             const geometry::IntegerPoint2D& pos )
 124     {
 125         SAL_INFO( "canvas.vcl", "::vclcanvas::CanvasBitmapHelper::getPixel()" );
 126
 127         if( !mpBackBuffer )
 128             return uno::Sequence< sal_Int8 >(); // we're disposed
 129
 130         rLayout = getMemoryLayout();
 131         rLayout.ScanLines = 1;
 132         rLayout.ScanLineBytes = 4;
 133         rLayout.ScanLineStride = rLayout.ScanLineBytes;
 134
 135         const Size aBmpSize( mpBackBuffer->getBitmapReference().GetSizePixel() );
 136
 137         ENSURE_ARG_OR_THROW( pos.X >= 0 && pos.X < aBmpSize.Width(),
 138                          "X coordinate out of bounds" );
 139         ENSURE_ARG_OR_THROW( pos.Y >= 0 && pos.Y < aBmpSize.Height(),
 140                          "Y coordinate out of bounds" );
 141
 142         ::Color aColor = mpBackBuffer->getBitmapReference().GetPixelColor(pos.X, pos.Y);
 143
 144         uno::Sequence< sal_Int8 > aRes( 4 );
 145         sal_Int8* pRes = aRes.getArray();
 146         pRes[ 0 ] = aColor.GetRed();
 147         pRes[ 1 ] = aColor.GetGreen();
 148         pRes[ 2 ] = aColor.GetBlue();
 149         pRes[ 3 ] = 255 - aColor.GetAlpha();
 150
 151         return aRes;
 152     }
 153
 154     rendering::IntegerBitmapLayout CanvasBitmapHelper::getMemoryLayout() const
 155     {
 156         if( !mpOutDevProvider )
 157             return rendering::IntegerBitmapLayout(); // we're disposed
 158
 159         rendering::IntegerBitmapLayout aBitmapLayout( ::canvas::tools::getStdMemoryLayout(getSize()) );
 160         if ( !hasAlpha() )
 161             aBitmapLayout.ColorSpace = canvas::tools::getStdColorSpaceWithoutAlpha();
 162
 163         return aBitmapLayout;
 164     }
 165
 166     BitmapEx CanvasBitmapHelper::getBitmap() const
 167     {
 168         if( !mpBackBuffer )
 169             return BitmapEx(); // we're disposed
 170         else
 171             return mpBackBuffer->getBitmapReference();
 172     }
 173
 174 }
 175
 176 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */