vcl/source/outdev/clipping.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 <osl/diagnose.h>
  22
  23 #include <tools/debug.hxx>
  24 #include <vcl/metaact.hxx>
  25 #include <vcl/virdev.hxx>
  26 #include <vcl/gdimtf.hxx>
  27 #include <vcl/outdev.hxx>
  28
  29 #include <salgdi.hxx>
  30
  31 void OutputDevice::SaveBackground(VirtualDevice& rSaveDevice,
  32                                   const Point& rPos, const Size& rSize, const Size& rBackgroundSize) const
  33 {
  34    rSaveDevice.DrawOutDev(Point(), rBackgroundSize, rPos, rSize, *this);
  35 }
  36
  37 vcl::Region OutputDevice::GetClipRegion() const
  38 {
  39
  40     return PixelToLogic( maRegion );
  41 }
  42
  43 void OutputDevice::SetClipRegion()
  44 {
  45
  46     if ( mpMetaFile )
  47         mpMetaFile->AddAction( new MetaClipRegionAction( vcl::Region(), false ) );
  48
  49     SetDeviceClipRegion( nullptr );
  50
  51     if( mpAlphaVDev )
  52         mpAlphaVDev->SetClipRegion();
  53 }
  54
  55 void OutputDevice::SetClipRegion( const vcl::Region& rRegion )
  56 {
  57
  58     if ( mpMetaFile )
  59         mpMetaFile->AddAction( new MetaClipRegionAction( rRegion, true ) );
  60
  61     if ( rRegion.IsNull() )
  62     {
  63         SetDeviceClipRegion( nullptr );
  64     }
  65     else
  66     {
  67         vcl::Region aRegion = LogicToPixel( rRegion );
  68         SetDeviceClipRegion( &aRegion );
  69     }
  70
  71     if( mpAlphaVDev )
  72         mpAlphaVDev->SetClipRegion( rRegion );
  73 }
  74
  75 bool OutputDevice::SelectClipRegion( const vcl::Region& rRegion, SalGraphics* pGraphics )
  76 {
  77     DBG_TESTSOLARMUTEX();
  78
  79     if( !pGraphics )
  80     {
  81         if( !mpGraphics && !AcquireGraphics() )
  82             return false;
  83         pGraphics = mpGraphics;
  84     }
  85
  86     bool bClipRegion = pGraphics->SetClipRegion( rRegion, this );
  87     OSL_ENSURE( bClipRegion, "OutputDevice::SelectClipRegion() - can't create region" );
  88     return bClipRegion;
  89 }
  90
  91 void OutputDevice::MoveClipRegion( tools::Long nHorzMove, tools::Long nVertMove )
  92 {
  93
  94     if ( mbClipRegion )
  95     {
  96         if( mpMetaFile )
  97             mpMetaFile->AddAction( new MetaMoveClipRegionAction( nHorzMove, nVertMove ) );
  98
  99         maRegion.Move( ImplLogicWidthToDevicePixel( nHorzMove ),
 100                        ImplLogicHeightToDevicePixel( nVertMove ) );
 101         mbInitClipRegion = true;
 102     }
 103
 104     if( mpAlphaVDev )
 105         mpAlphaVDev->MoveClipRegion( nHorzMove, nVertMove );
 106 }
 107
 108 void OutputDevice::IntersectClipRegion( const tools::Rectangle& rRect )
 109 {
 110
 111     if ( mpMetaFile )
 112         mpMetaFile->AddAction( new MetaISectRectClipRegionAction( rRect ) );
 113
 114     tools::Rectangle aRect = LogicToPixel( rRect );
 115     maRegion.Intersect( aRect );
 116     mbClipRegion        = true;
 117     mbInitClipRegion    = true;
 118
 119     if( mpAlphaVDev )
 120         mpAlphaVDev->IntersectClipRegion( rRect );
 121 }
 122
 123 void OutputDevice::IntersectClipRegion( const vcl::Region& rRegion )
 124 {
 125
 126     if(!rRegion.IsNull())
 127     {
 128         if ( mpMetaFile )
 129             mpMetaFile->AddAction( new MetaISectRegionClipRegionAction( rRegion ) );
 130
 131         vcl::Region aRegion = LogicToPixel( rRegion );
 132         maRegion.Intersect( aRegion );
 133         mbClipRegion        = true;
 134         mbInitClipRegion    = true;
 135     }
 136
 137     if( mpAlphaVDev )
 138         mpAlphaVDev->IntersectClipRegion( rRegion );
 139 }
 140
 141 void OutputDevice::InitClipRegion()
 142 {
 143     DBG_TESTSOLARMUTEX();
 144
 145     if ( mbClipRegion )
 146     {
 147         if ( maRegion.IsEmpty() )
 148             mbOutputClipped = true;
 149         else
 150         {
 151             mbOutputClipped = false;
 152
 153             // #102532# Respect output offset also for clip region
 154             vcl::Region aRegion = ClipToDeviceBounds(ImplPixelToDevicePixel(maRegion));
 155
 156             if ( aRegion.IsEmpty() )
 157             {
 158                 mbOutputClipped = true;
 159             }
 160             else
 161             {
 162                 mbOutputClipped = false;
 163                 SelectClipRegion( aRegion );
 164             }
 165         }
 166
 167         mbClipRegionSet = true;
 168     }
 169     else
 170     {
 171         if ( mbClipRegionSet )
 172         {
 173             if (mpGraphics)
 174                 mpGraphics->ResetClipRegion();
 175             mbClipRegionSet = false;
 176         }
 177
 178         mbOutputClipped = false;
 179     }
 180
 181     mbInitClipRegion = false;
 182 }
 183
 184 vcl::Region OutputDevice::ClipToDeviceBounds(vcl::Region aRegion) const
 185 {
 186     aRegion.Intersect(tools::Rectangle{mnOutOffX,
 187                                        mnOutOffY,
 188                                        mnOutOffX + GetOutputWidthPixel() - 1,
 189                                        mnOutOffY + GetOutputHeightPixel() - 1
 190                                       });
 191     return aRegion;
 192 }
 193
 194 vcl::Region OutputDevice::GetActiveClipRegion() const
 195 {
 196     return GetClipRegion();
 197 }
 198
 199 void OutputDevice::ClipToPaintRegion(tools::Rectangle& /*rDstRect*/)
 200 {
 201     // this is only used in Window, but we still need it as it's called
 202     // on in other clipping functions
 203 }
 204
 205 void OutputDevice::SetDeviceClipRegion( const vcl::Region* pRegion )
 206 {
 207     DBG_TESTSOLARMUTEX();
 208
 209     if ( !pRegion )
 210     {
 211         if ( mbClipRegion )
 212         {
 213             maRegion            = vcl::Region(true);
 214             mbClipRegion        = false;
 215             mbInitClipRegion    = true;
 216         }
 217     }
 218     else
 219     {
 220         maRegion            = *pRegion;
 221         mbClipRegion        = true;
 222         mbInitClipRegion    = true;
 223     }
 224 }
 225
 226 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */