vcl/headless/svpvd.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 #ifndef IOS
  21
  22 #include <headless/svpbmp.hxx>
  23 #include <headless/svpinst.hxx>
  24 #include <headless/svpvd.hxx>
  25 #include <headless/svpgdi.hxx>
  26
  27 #include <basegfx/vector/b2ivector.hxx>
  28 #include <comphelper/lok.hxx>
  29
  30 #include <cairo.h>
  31
  32 using namespace basegfx;
  33
  34 SvpSalVirtualDevice::SvpSalVirtualDevice(cairo_surface_t* pRefSurface, cairo_surface_t* pPreExistingTarget)
  35     : m_pRefSurface(pRefSurface)
  36     , m_pSurface(pPreExistingTarget)
  37     , m_bOwnsSurface(!pPreExistingTarget)
  38 {
  39     cairo_surface_reference(m_pRefSurface);
  40 }
  41
  42 SvpSalVirtualDevice::~SvpSalVirtualDevice()
  43 {
  44     if (m_bOwnsSurface)
  45         cairo_surface_destroy(m_pSurface);
  46     cairo_surface_destroy(m_pRefSurface);
  47 }
  48
  49 SvpSalGraphics* SvpSalVirtualDevice::AddGraphics(SvpSalGraphics* pGraphics)
  50 {
  51     pGraphics->setSurface(m_pSurface, m_aFrameSize);
  52     m_aGraphics.push_back(pGraphics);
  53     return pGraphics;
  54 }
  55
  56 SalGraphics* SvpSalVirtualDevice::AcquireGraphics()
  57 {
  58     return AddGraphics(new SvpSalGraphics());
  59 }
  60
  61 void SvpSalVirtualDevice::ReleaseGraphics( SalGraphics* pGraphics )
  62 {
  63     m_aGraphics.erase(std::remove(m_aGraphics.begin(), m_aGraphics.end(), dynamic_cast<SvpSalGraphics*>(pGraphics)), m_aGraphics.end());
  64     delete pGraphics;
  65 }
  66
  67 bool SvpSalVirtualDevice::SetSize( tools::Long nNewDX, tools::Long nNewDY )
  68 {
  69     return SetSizeUsingBuffer(nNewDX, nNewDY, nullptr);
  70 }
  71
  72 bool SvpSalVirtualDevice::CreateSurface(tools::Long nNewDX, tools::Long nNewDY, sal_uInt8 *const pBuffer)
  73 {
  74     if (m_pSurface)
  75     {
  76         cairo_surface_destroy(m_pSurface);
  77     }
  78
  79     if (pBuffer)
  80     {
  81         // The buffer should only be set by VirtualDevice::SetOutputSizePixelScaleOffsetAndLOKBuffer()
  82         // when used to draw a tile for LOK. It cannot be used for something else, because otherwise
  83         // this would need a way to detect whether this is a tiled paint that needs LOK handling
  84         // or whether it's that something else that just might happen to be called with LOK active.
  85         assert(comphelper::LibreOfficeKit::isActive());
  86         // Force scaling of the painting
  87         double fScale = comphelper::LibreOfficeKit::getDPIScale();
  88
  89         m_pSurface = cairo_image_surface_create_for_data(pBuffer, CAIRO_FORMAT_ARGB32,
  90                             nNewDX, nNewDY, cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, nNewDX));
  91         dl_cairo_surface_set_device_scale(m_pSurface, fScale, fScale);
  92     }
  93     else if(nNewDX <= 32 && nNewDY <= 32)
  94     {
  95         double fXScale, fYScale;
  96         dl_cairo_surface_get_device_scale(m_pRefSurface, &fXScale, &fYScale);
  97         nNewDX *= fXScale;
  98         nNewDY *= fYScale;
  99
 100         // Force image-based surface if small. Small VirtualDevice instances are often used for small
 101         // temporary bitmaps that will eventually have GetBitmap() called on them, which would cause
 102         // X Server roundtrip with Xlib-based surface, which may be way more costly than doing the drawing
 103         // in software (which should be fairly cheap for small surfaces anyway).
 104         m_pSurface = cairo_surface_create_similar_image(m_pRefSurface, CAIRO_FORMAT_ARGB32, nNewDX, nNewDY);
 105         dl_cairo_surface_set_device_scale(m_pSurface, fXScale, fYScale);
 106     }
 107     else
 108     {
 109         m_pSurface = cairo_surface_create_similar(m_pRefSurface, CAIRO_CONTENT_COLOR_ALPHA, nNewDX, nNewDY);
 110         // Device scale is inherited in this case.
 111     }
 112
 113     SAL_WARN_IF(cairo_surface_status(m_pSurface) != CAIRO_STATUS_SUCCESS, "vcl", "surface of size " << nNewDX << " by " << nNewDY << " creation failed with status of: " << cairo_status_to_string(cairo_surface_status(m_pSurface)));
 114     return cairo_surface_status(m_pSurface) == CAIRO_STATUS_SUCCESS;
 115 }
 116
 117 bool SvpSalVirtualDevice::SetSizeUsingBuffer( tools::Long nNewDX, tools::Long nNewDY,
 118         sal_uInt8 *const pBuffer)
 119 {
 120     bool bSuccess = true;
 121
 122     if (nNewDX == 0)
 123         nNewDX = 1;
 124     if (nNewDY == 0)
 125         nNewDY = 1;
 126
 127     if (!m_pSurface || m_aFrameSize.getX() != nNewDX ||
 128                        m_aFrameSize.getY() != nNewDY)
 129     {
 130         m_aFrameSize = basegfx::B2IVector(nNewDX, nNewDY);
 131
 132         if (m_bOwnsSurface)
 133             bSuccess = CreateSurface(nNewDX, nNewDY, pBuffer);
 134
 135         assert(m_pSurface);
 136
 137         // update device in existing graphics
 138         for (auto const& graphic : m_aGraphics)
 139             graphic->setSurface(m_pSurface, m_aFrameSize);
 140     }
 141
 142     return bSuccess;
 143 }
 144
 145 tools::Long SvpSalVirtualDevice::GetWidth() const
 146 {
 147     return m_pSurface ? m_aFrameSize.getX() : 0;
 148 }
 149
 150 tools::Long SvpSalVirtualDevice::GetHeight() const
 151 {
 152     return m_pSurface ? m_aFrameSize.getY() : 0;
 153 }
 154
 155 #endif
 156
 157 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */