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 <canvas/debug.hxx>
  22 #include <tools/diagnose_ex.h>
  23 #include <canvas/verbosetrace.hxx>
  24 #include <cppuhelper/supportsservice.hxx>
  25
  26 #include <rtl/math.hxx>
  27
  28 #include <vcl/outdev.hxx>
  29 #include <vcl/bitmap.hxx>
  30 #include <vcl/alpha.hxx>
  31 #include <vcl/bitmapex.hxx>
  32 #include <vcl/canvastools.hxx>
  33
  34 #include <basegfx/matrix/b2dhommatrix.hxx>
  35 #include <basegfx/point/b2dpoint.hxx>
  36 #include <basegfx/tools/canvastools.hxx>
  37 #include <basegfx/polygon/b2dpolygon.hxx>
  38 #include <basegfx/polygon/b2dpolygontools.hxx>
  39 #include <basegfx/polygon/b2dpolypolygontools.hxx>
  40 #include <basegfx/numeric/ftools.hxx>
  41
  42 #include <canvas/canvastools.hxx>
  43
  44 #include "canvascustomsprite.hxx"
  45
  46 using namespace ::com::sun::star;
  47
  48
  49 namespace vclcanvas
  50 {
  51
  52     CanvasCustomSprite::CanvasCustomSprite( const geometry::RealSize2D&               rSpriteSize,
  53                                             rendering::XGraphicDevice&                rDevice,
  54                                             const ::canvas::SpriteSurface::Reference& rOwningSpriteCanvas,
  55                                             const OutDevProviderSharedPtr&            rOutDevProvider,
  56                                             bool                                      bShowSpriteBounds )
  57     {
  58         ENSURE_OR_THROW( rOwningSpriteCanvas.get() &&
  59                          rOutDevProvider,
  60                          "CanvasCustomSprite::CanvasCustomSprite(): Invalid sprite canvas" );
  61
  62         // setup back buffer
  63
  64
  65         const ::Size aSize(
  66             static_cast<sal_Int32>( ::std::max( 1.0,
  67                                                 ceil( rSpriteSize.Width ))),  // round up to nearest int,
  68                                                                               // enforce sprite to have at
  69                                                                                // least (1,1) pixel size
  70             static_cast<sal_Int32>( ::std::max( 1.0,
  71                                                 ceil( rSpriteSize.Height ))) );
  72
  73         // create content backbuffer in screen depth
  74         BackBufferSharedPtr pBackBuffer( new BackBuffer( rOutDevProvider->getOutDev() ) );
  75         pBackBuffer->setSize( aSize );
  76
  77         // create mask backbuffer, with one bit color depth
  78         BackBufferSharedPtr pBackBufferMask( new BackBuffer( rOutDevProvider->getOutDev(),
  79                                                              true ) );
  80         pBackBufferMask->setSize( aSize );
  81
  82         // TODO(F1): Implement alpha vdev (could prolly enable
  83         // antialiasing again, then)
  84
  85         // disable font antialiasing (causes ugly shadows otherwise)
  86         pBackBuffer->getOutDev().SetAntialiasing( AntialiasingFlags::DisableText );
  87         pBackBufferMask->getOutDev().SetAntialiasing( AntialiasingFlags::DisableText );
  88
  89         // set mask vdev drawmode, such that everything is painted
  90         // black. That leaves us with a binary image, white for
  91         // background, black for painted content
  92         pBackBufferMask->getOutDev().SetDrawMode( DrawModeFlags::BlackLine | DrawModeFlags::BlackFill | DrawModeFlags::BlackText |
  93                                                   DrawModeFlags::BlackGradient | DrawModeFlags::BlackBitmap );
  94
  95
  96         // setup canvas helper
  97
  98
  99         // always render into back buffer, don't preserve state (it's
 100         // our private VDev, after all), have notion of alpha
 101         maCanvasHelper.init( rDevice,
 102                              pBackBuffer,
 103                              false,
 104                              true );
 105         maCanvasHelper.setBackgroundOutDev( pBackBufferMask );
 106
 107
 108         // setup sprite helper
 109
 110
 111         maSpriteHelper.init( rSpriteSize,
 112                              rOwningSpriteCanvas,
 113                              pBackBuffer,
 114                              pBackBufferMask,
 115                              bShowSpriteBounds );
 116
 117         // clear sprite to 100% transparent
 118         maCanvasHelper.clear();
 119     }
 120
 121     OUString SAL_CALL CanvasCustomSprite::getImplementationName() throw( uno::RuntimeException, std::exception )
 122     {
 123         return OUString( "VCLCanvas.CanvasCustomSprite" );
 124     }
 125
 126     sal_Bool SAL_CALL CanvasCustomSprite::supportsService( const OUString& ServiceName ) throw( uno::RuntimeException, std::exception )
 127     {
 128         return cppu::supportsService( this, ServiceName );
 129     }
 130
 131     uno::Sequence< OUString > SAL_CALL CanvasCustomSprite::getSupportedServiceNames()  throw( uno::RuntimeException, std::exception )
 132     {
 133         uno::Sequence< OUString > aRet(1);
 134         aRet[0] = "com.sun.star.rendering.CanvasCustomSprite";
 135
 136         return aRet;
 137     }
 138
 139     // Sprite
 140     void CanvasCustomSprite::redraw( OutputDevice& rOutDev,
 141                                      bool          bBufferedUpdate ) const
 142     {
 143         SolarMutexGuard aGuard;
 144
 145         redraw( rOutDev, maSpriteHelper.getPosPixel(), bBufferedUpdate );
 146     }
 147
 148     void CanvasCustomSprite::redraw( OutputDevice&              rOutDev,
 149                                      const ::basegfx::B2DPoint& rOrigOutputPos,
 150                                      bool                       bBufferedUpdate ) const
 151     {
 152         SolarMutexGuard aGuard;
 153
 154         maSpriteHelper.redraw( rOutDev,
 155                                rOrigOutputPos,
 156                                mbSurfaceDirty,
 157                                bBufferedUpdate );
 158
 159         mbSurfaceDirty = false;
 160     }
 161
 162     bool CanvasCustomSprite::repaint( const GraphicObjectSharedPtr& rGrf,
 163                                       const rendering::ViewState&   viewState,
 164                                       const rendering::RenderState& renderState,
 165                                       const ::Point&                rPt,
 166                                       const ::Size&                 rSz,
 167                                       const GraphicAttr&            rAttr ) const
 168     {
 169         SolarMutexGuard aGuard;
 170
 171         mbSurfaceDirty = true;
 172
 173         return maCanvasHelper.repaint( rGrf, viewState, renderState, rPt, rSz, rAttr );
 174     }
 175
 176 }
 177
 178 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */