175 lines
6.7 KiB
C++
175 lines
6.7 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <boost/bind.hpp>
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#include <basegfx/polygon/b2dpolygoncutandtouch.hxx>
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#include <basegfx/polygon/b2dpolygontriangulator.hxx>
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#include <basegfx/polygon/b2dpolypolygontools.hxx>
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#include "surfaceproxy.hxx"
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namespace canvas
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{
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// SurfaceProxy::SurfaceProxy
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SurfaceProxy::SurfaceProxy( const canvas::IColorBufferSharedPtr& pBuffer,
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const PageManagerSharedPtr& pPageManager ) :
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mpPageManager( pPageManager ),
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maSurfaceList(),
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mpBuffer( pBuffer )
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{
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const ::basegfx::B2ISize aImageSize(mpBuffer->getWidth(),mpBuffer->getHeight());
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const ::basegfx::B2ISize aPageSize(mpPageManager->getPageSize());
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const sal_Int32 aPageSizeX(aPageSize.getX());
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const sal_Int32 aPageSizeY(aPageSize.getY());
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const sal_Int32 aImageSizeX(aImageSize.getX());
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const sal_Int32 aImageSizeY(aImageSize.getY());
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// see if the size of the colorbuffer is larger than the size
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// of a single page. if this is the case we divide the
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// colorbuffer into as many surfaces as we need to get the
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// whole area distributed. otherwise (the colorbuffer is
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// smaller than the size of a single page) we search for free
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// pages or create a new one.
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// the incoming image is too large to fit into a single
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// page. strategy: we split the image into rectangular
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// areas that are as large as the maximum page size
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// dictates and follow the strategy for fitting images.
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size_t dwNumSurfaces(0);
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for(sal_Int32 y=0; y<aImageSizeY; y+=aPageSizeY)
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for(sal_Int32 x=0; x<aImageSizeX; x+=aPageSizeX)
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++dwNumSurfaces;
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maSurfaceList.reserve(dwNumSurfaces);
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for(sal_Int32 y=0; y<aImageSizeY; y+=aPageSizeY)
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{
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for(sal_Int32 x=0; x<aImageSizeX; x+=aPageSizeX)
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{
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// the current surface is located at the position [x,y]
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// and has the size [min(restx,pagesizex),min(resty,pagesizey)
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::basegfx::B2IPoint aOffset(x,y);
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::basegfx::B2ISize aSize( ::std::min( aImageSize.getX()-x,
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aPageSize.getX() ),
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::std::min( aImageSize.getY()-y,
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aPageSize.getY() ) );
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maSurfaceList.push_back(
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SurfaceSharedPtr(
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new Surface(
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mpPageManager,
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mpBuffer,
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aOffset,
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aSize)));
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}
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}
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}
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// SurfaceProxy::setColorBufferDirty
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void SurfaceProxy::setColorBufferDirty()
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{
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::std::for_each( maSurfaceList.begin(),
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maSurfaceList.end(),
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::boost::mem_fn(&Surface::setColorBufferDirty));
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}
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// SurfaceProxy::draw
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bool SurfaceProxy::draw( double fAlpha,
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const ::basegfx::B2DPoint& rPos,
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const ::basegfx::B2DHomMatrix& rTransform )
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{
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::std::for_each( maSurfaceList.begin(),
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maSurfaceList.end(),
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::boost::bind( &Surface::draw,
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_1,
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fAlpha,
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::boost::cref(rPos),
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::boost::cref(rTransform)));
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return true;
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}
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// SurfaceProxy::draw
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bool SurfaceProxy::draw( double fAlpha,
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const ::basegfx::B2DPoint& rPos,
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const ::basegfx::B2DRange& rArea,
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const ::basegfx::B2DHomMatrix& rTransform )
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{
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::std::for_each( maSurfaceList.begin(),
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maSurfaceList.end(),
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::boost::bind(&Surface::drawRectangularArea,
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_1,
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fAlpha,
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::boost::cref(rPos),
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::boost::cref(rArea),
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::boost::cref(rTransform)));
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return true;
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}
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// SurfaceProxy::draw
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bool SurfaceProxy::draw( double fAlpha,
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const ::basegfx::B2DPoint& rPos,
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const ::basegfx::B2DPolyPolygon& rClipPoly,
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const ::basegfx::B2DHomMatrix& rTransform )
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{
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const ::basegfx::B2DPolygon& rTriangulatedPolygon(
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::basegfx::triangulator::triangulate(rClipPoly));
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#if OSL_DEBUG_LEVEL > 2
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// dump polygons
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OSL_TRACE( "Original clip polygon: %s\n"
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"Triangulated polygon: %s\n",
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OUStringToOString(
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basegfx::tools::exportToSvgD( rClipPoly, true, true, false ),
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RTL_TEXTENCODING_ASCII_US).getStr(),
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OUStringToOString(
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basegfx::tools::exportToSvgD(
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basegfx::B2DPolyPolygon(rTriangulatedPolygon), true, true, false ),
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RTL_TEXTENCODING_ASCII_US).getStr() );
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#endif
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::std::for_each( maSurfaceList.begin(),
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maSurfaceList.end(),
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::boost::bind(&Surface::drawWithClip,
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_1,
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fAlpha,
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::boost::cref(rPos),
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::boost::cref(rTriangulatedPolygon),
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::boost::cref(rTransform)));
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return true;
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}
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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