canvas/source/vcl/canvascustomsprite.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 <sal/config.h>
  22
  23 #include <basegfx/point/b2dpoint.hxx>
  24 #include <cppuhelper/supportsservice.hxx>
  25 #include <comphelper/diagnose_ex.hxx>
  26 #include <vcl/outdev.hxx>
  27
  28 #include "canvascustomsprite.hxx"
  29
  30 using namespace ::com::sun::star;
  31
  32
  33 namespace vclcanvas
  34 {
  35
  36     CanvasCustomSprite::CanvasCustomSprite( const geometry::RealSize2D&               rSpriteSize,
  37                                             rendering::XGraphicDevice&                rDevice,
  38                                             const ::canvas::SpriteSurface::Reference& rOwningSpriteCanvas,
  39                                             const OutDevProviderSharedPtr&            rOutDevProvider,
  40                                             bool                                      bShowSpriteBounds )
  41     {
  42         ENSURE_OR_THROW( rOwningSpriteCanvas &&
  43                          rOutDevProvider,
  44                          "CanvasCustomSprite::CanvasCustomSprite(): Invalid sprite canvas" );
  45
  46         // setup back buffer
  47
  48
  49         const ::Size aSize(
  50             static_cast<sal_Int32>( std::max( 1.0,
  51                                                 ceil( rSpriteSize.Width ))),  // round up to nearest int,
  52                                                                               // enforce sprite to have at
  53                                                                                // least (1,1) pixel size
  54             static_cast<sal_Int32>( std::max( 1.0,
  55                                                 ceil( rSpriteSize.Height ))) );
  56
  57         // create content backbuffer in screen depth
  58         BackBufferSharedPtr pBackBuffer = std::make_shared<BackBuffer>( rOutDevProvider->getOutDev() );
  59         pBackBuffer->setSize( aSize );
  60
  61         // create mask backbuffer
  62         BackBufferSharedPtr pBackBufferMask = std::make_shared<BackBuffer>( rOutDevProvider->getOutDev() );
  63         pBackBufferMask->setSize( aSize );
  64
  65         // TODO(F1): Implement alpha vdev (could prolly enable
  66         // antialiasing again, then)
  67
  68         // disable font antialiasing (causes ugly shadows otherwise)
  69         pBackBuffer->getOutDev().SetAntialiasing( AntialiasingFlags::DisableText );
  70         pBackBufferMask->getOutDev().SetAntialiasing( AntialiasingFlags::DisableText );
  71
  72         // set mask vdev drawmode, such that everything is painted
  73         // black. That leaves us with a binary image, white for
  74         // background, black for painted content
  75         pBackBufferMask->getOutDev().SetDrawMode( DrawModeFlags::BlackLine | DrawModeFlags::BlackFill | DrawModeFlags::BlackText |
  76                                                   DrawModeFlags::BlackGradient | DrawModeFlags::BlackBitmap );
  77
  78
  79         // setup canvas helper
  80
  81
  82         // always render into back buffer, don't preserve state (it's
  83         // our private VDev, after all), have notion of alpha
  84         maCanvasHelper.init( rDevice,
  85                              pBackBuffer,
  86                              false,
  87                              true );
  88         maCanvasHelper.setBackgroundOutDev( pBackBufferMask );
  89
  90
  91         // setup sprite helper
  92
  93
  94         maSpriteHelper.init( rSpriteSize,
  95                              rOwningSpriteCanvas,
  96                              pBackBuffer,
  97                              pBackBufferMask,
  98                              bShowSpriteBounds );
  99
 100         // clear sprite to 100% transparent
 101         maCanvasHelper.clear();
 102     }
 103
 104     OUString SAL_CALL CanvasCustomSprite::getImplementationName()
 105     {
 106         return u"VCLCanvas.CanvasCustomSprite"_ustr;
 107     }
 108
 109     sal_Bool SAL_CALL CanvasCustomSprite::supportsService( const OUString& ServiceName )
 110     {
 111         return cppu::supportsService( this, ServiceName );
 112     }
 113
 114     uno::Sequence< OUString > SAL_CALL CanvasCustomSprite::getSupportedServiceNames()
 115     {
 116         return { u"com.sun.star.rendering.CanvasCustomSprite"_ustr };
 117     }
 118
 119     // Sprite
 120     void CanvasCustomSprite::redraw( OutputDevice& rOutDev,
 121                                      bool          bBufferedUpdate ) const
 122     {
 123         SolarMutexGuard aGuard;
 124
 125         redraw( rOutDev, maSpriteHelper.getPosPixel(), bBufferedUpdate );
 126     }
 127
 128     void CanvasCustomSprite::redraw( OutputDevice&              rOutDev,
 129                                      const ::basegfx::B2DPoint& rOrigOutputPos,
 130                                      bool                       bBufferedUpdate ) const
 131     {
 132         SolarMutexGuard aGuard;
 133
 134         maSpriteHelper.redraw( rOutDev,
 135                                rOrigOutputPos,
 136                                mbSurfaceDirty,
 137                                bBufferedUpdate );
 138
 139         mbSurfaceDirty = false;
 140     }
 141
 142     bool CanvasCustomSprite::repaint( const GraphicObjectSharedPtr& rGrf,
 143                                       const rendering::ViewState&   viewState,
 144                                       const rendering::RenderState& renderState,
 145                                       const ::Point&                rPt,
 146                                       const ::Size&                 rSz,
 147                                       const GraphicAttr&            rAttr ) const
 148     {
 149         SolarMutexGuard aGuard;
 150
 151         mbSurfaceDirty = true;
 152
 153         return maCanvasHelper.repaint( rGrf, viewState, renderState, rPt, rSz, rAttr );
 154     }
 155
 156 }
 157
 158 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */