canvas/source/cairo/cairo_canvas.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 #include <sal/config.h>
  21 #include <sal/log.hxx>
  22
  23 #include <com/sun/star/awt/Rectangle.hpp>
  24 #include <com/sun/star/lang/NoSupportException.hpp>
  25 #include <osl/mutex.hxx>
  26 #include <tools/diagnose_ex.h>
  27 #include <vcl/sysdata.hxx>
  28 #include <vcl/skia/SkiaHelper.hxx>
  29 #include <vcl/window.hxx>
  30 #include <cppuhelper/supportsservice.hxx>
  31
  32 #include "cairo_canvas.hxx"
  33
  34 using namespace ::cairo;
  35 using namespace ::com::sun::star;
  36
  37 namespace cairocanvas
  38 {
  39     Canvas::Canvas( const uno::Sequence< uno::Any >&                aArguments,
  40                     const uno::Reference< uno::XComponentContext >& /*rxContext*/ ) :
  41         maArguments(aArguments)
  42     {
  43     }
  44
  45     void Canvas::initialize()
  46     {
  47         // #i64742# Only perform initialization when not in probe mode
  48         if( !maArguments.hasElements() )
  49             return;
  50
  51         assert( !SkiaHelper::isVCLSkiaEnabled() );
  52
  53         /* maArguments:
  54            0: ptr to creating instance (Window or VirtualDevice)
  55            1: current bounds of creating instance
  56            2: bool, denoting always on top state for Window (always false for VirtualDevice)
  57            3: XWindow for creating Window (or empty for VirtualDevice)
  58            4: SystemGraphicsData as a streamed Any
  59          */
  60         SAL_INFO("canvas.cairo","Canvas created " <<  this);
  61
  62         ENSURE_ARG_OR_THROW( maArguments.getLength() >= 5 &&
  63                              maArguments[0].getValueTypeClass() == uno::TypeClass_HYPER &&
  64                              maArguments[4].getValueTypeClass() == uno::TypeClass_SEQUENCE,
  65                              "Canvas::initialize: wrong number of arguments, or wrong types" );
  66
  67         // We expect a single Any here, containing a pointer to a valid
  68         // VCL output device, on which to output (mostly needed for text)
  69         sal_Int64 nPtr = 0;
  70         maArguments[0] >>= nPtr;
  71         OutputDevice* pOutDev = reinterpret_cast<OutputDevice*>(nPtr);
  72         ENSURE_ARG_OR_THROW( pOutDev != nullptr,
  73                              "Canvas::initialize: invalid OutDev pointer" );
  74
  75         awt::Rectangle aBounds;
  76         maArguments[1] >>= aBounds;
  77
  78         uno::Sequence<sal_Int8> aSeq;
  79         maArguments[4] >>= aSeq;
  80
  81         const SystemGraphicsData* pSysData=reinterpret_cast<const SystemGraphicsData*>(aSeq.getConstArray());
  82         if( !pSysData || !pSysData->nSize )
  83             throw lang::NoSupportException( "Passed SystemGraphicsData invalid!" );
  84
  85         bool bHasCairo = pOutDev->SupportsCairo();
  86         ENSURE_ARG_OR_THROW(bHasCairo, "SpriteCanvas::SpriteCanvas: No Cairo capability");
  87
  88         // setup helper
  89         maDeviceHelper.init( *this, *pOutDev );
  90
  91         maCanvasHelper.init( basegfx::B2ISize(aBounds.Width, aBounds.Height), *this, this );
  92
  93         // forward surface to render on to canvashelper
  94         maCanvasHelper.setSurface( maDeviceHelper.getSurface(), false );
  95
  96         maArguments.realloc(0);
  97     }
  98
  99     Canvas::~Canvas()
 100     {
 101         SAL_INFO("canvas.cairo", "CairoCanvas destroyed" );
 102     }
 103
 104     void Canvas::disposeThis()
 105     {
 106         ::osl::MutexGuard aGuard( m_aMutex );
 107
 108         // forward to parent
 109         CanvasBaseT::disposeThis();
 110     }
 111
 112     OUString SAL_CALL Canvas::getServiceName(  )
 113     {
 114         return "com.sun.star.rendering.Canvas.Cairo";
 115     }
 116
 117     //  XServiceInfo
 118     sal_Bool Canvas::supportsService(const OUString& sServiceName)
 119     {
 120         return cppu::supportsService(this, sServiceName);
 121
 122     }
 123     OUString Canvas::getImplementationName()
 124     {
 125         return "com.sun.star.comp.rendering.Canvas.Cairo";
 126     }
 127     css::uno::Sequence< OUString > Canvas::getSupportedServiceNames()
 128     {
 129         return { getServiceName() };
 130     }
 131
 132     bool Canvas::repaint( const SurfaceSharedPtr&       pSurface,
 133                           const rendering::ViewState&   viewState,
 134                           const rendering::RenderState& renderState )
 135     {
 136         return maCanvasHelper.repaint( pSurface, viewState, renderState );
 137     }
 138
 139     SurfaceSharedPtr Canvas::getSurface()
 140     {
 141         return maDeviceHelper.getSurface();
 142     }
 143
 144     SurfaceSharedPtr Canvas::createSurface( const ::basegfx::B2ISize& rSize, int aContent )
 145     {
 146         return maDeviceHelper.createSurface( rSize, aContent );
 147     }
 148
 149     SurfaceSharedPtr Canvas::createSurface( ::Bitmap& rBitmap )
 150     {
 151         SurfaceSharedPtr pSurface;
 152
 153         BitmapSystemData aData;
 154         if( rBitmap.GetSystemData( aData ) ) {
 155             const Size& rSize = rBitmap.GetSizePixel();
 156
 157             pSurface = maDeviceHelper.createSurface( aData, rSize );
 158         }
 159
 160         return pSurface;
 161     }
 162
 163     SurfaceSharedPtr Canvas::changeSurface()
 164     {
 165         // non-modifiable surface here
 166         return SurfaceSharedPtr();
 167     }
 168
 169     OutputDevice* Canvas::getOutputDevice()
 170     {
 171         return maDeviceHelper.getOutputDevice();
 172     }
 173 }
 174
 175 extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
 176 com_sun_star_comp_rendering_Canvas_Cairo_get_implementation(
 177     css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& args)
 178 {
 179     rtl::Reference<cairocanvas::Canvas> p = new cairocanvas::Canvas(args, context);
 180     p->acquire();
 181     try {
 182         p->initialize();
 183     } catch (css::uno::Exception&) {
 184         p->dispose();
 185         p->release();
 186         throw;
 187     }
 188     return static_cast<cppu::OWeakObject*>(p.get());
 189 }
 190
 191
 192 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */