132 lines
4.3 KiB
C++
132 lines
4.3 KiB
C++
/*************************************************************************
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2008 by Sun Microsystems, Inc.
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* $RCSfile: cairo_cairo.cxx,v $
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* $Revision: 1.8 $
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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*
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************************************************************************/
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// MARKER(update_precomp.py): autogen include statement, do not remove
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#include "precompiled_canvas.hxx"
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/****************************************************************************************
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* Platform independent part of surface backends for OpenOffice.org Cairo Canvas *
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* For rest of the functions, see platform specific cairo_<platform>_cairo.cxx *
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****************************************************************************************/
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#include "cairo_cairo.hxx"
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namespace cairo
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{
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/**
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* Surface::getCairo: Create Cairo for the Canvas surface
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*
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* @return new Cairo or NULL
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**/
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Cairo* Surface::getCairo()
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{
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Cairo *cr = NULL;
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if (mpSurface) {
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cr = cairo_create( mpSurface );
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}
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return cr;
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}
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// This is needed to distinguish support for Cairo versions < 1.2.
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#if !defined (USE_CAIRO10_APIS)
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/**
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* Surface::~Surface: Destroy the Canvas surface
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*
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* Cairo itself takes care of freeing any resources, such as
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* image data and other references related to the surface.
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*
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**/
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Surface::~Surface()
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{
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if( mpSurface )
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{
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cairo_surface_destroy( mpSurface );
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mpSurface = NULL;
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}
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}
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/**
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* Surface::getSimilar: Create new similar Canvas surface
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* @param aContent format of the new surface (cairo_content_t from cairo/src/cairo.h)
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* @param width width of the new surface
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* @param height height of the new surface
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*
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* Creates a new Canvas surface. This should create platform native surface, even though
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* generic function is used.
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*
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* Cairo surface from aContent (cairo_content_t)
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*
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* @return new surface or NULL
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**/
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Surface* Surface::getSimilar( Content aContent, int width, int height )
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{
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// This should create platform native Cairo surface on ALL platforms.
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return new Surface( cairo_surface_create_similar( mpSurface, aContent, width, height ) );
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// For example on Mac OS X, cairo_surface_create_similar() actually results in native surface,
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// equivalent to cairo_quartz_surface_create()
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}
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#endif // !defined (USE_CAIRO10_APIS)
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/**
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* Surface::createVirtualDevice: Create new VCL virtual device
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*
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* Creates a new virtual device in VCL, with the current mpSurface contents as data.
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* This is used by e.g. cairo_canvashelper_text.cxx to make VCL draw text on the cairo surface.
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*
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* @return new virtual device
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**/
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VirtualDevice* Surface::createVirtualDevice()
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{
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// struct SystemGraphicsData in vcl/inc/sysdata.hxx
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SystemGraphicsData aSystemGraphicsData;
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aSystemGraphicsData.nSize = sizeof(SystemGraphicsData);
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fillSystemGraphicsData( aSystemGraphicsData );
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/**
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* Contrary to the description of
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* VirtualDevice(SystemGraphicsData*, nBitCount); (in vcl/inc/virdev.hxx)
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* at least X11 behaves differently, i.e. nBitCount is color depth, not just 1 or 0.
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**/
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return new VirtualDevice( &aSystemGraphicsData,
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sal::static_int_cast<USHORT>(getDepth()) );
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}
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} // namespace cairo
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