f896bbcffe
Change-Id: Iaf7d02bb236f81a38a67a1430a718b6c3c78efae Reviewed-on: https://gerrit.libreoffice.org/c/core/+/139708 Tested-by: Jenkins Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>
141 lines
6 KiB
C++
141 lines
6 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 <sal/config.h>
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#include <sal/log.hxx>
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#include <basegfx/polygon/b2dpolypolygon.hxx>
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#include <basegfx/polygon/b2dpolygontriangulator.hxx>
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#include <basegfx/polygon/b2dpolypolygontools.hxx>
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#include <utility>
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#include "surfaceproxy.hxx"
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namespace canvas
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{
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SurfaceProxy::SurfaceProxy( std::shared_ptr<canvas::IColorBuffer> xBuffer,
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PageManagerSharedPtr xPageManager ) :
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mpPageManager(std::move( xPageManager )),
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mpBuffer(std::move( xBuffer ))
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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.getWidth());
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const sal_Int32 aPageSizeY(aPageSize.getHeight());
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const sal_Int32 aImageSizeX(aImageSize.getWidth());
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const sal_Int32 aImageSizeY(aImageSize.getHeight());
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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.getWidth()-x,
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aPageSize.getWidth() ),
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std::min( aImageSize.getHeight()-y,
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aPageSize.getHeight() ) );
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maSurfaceList.push_back(
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std::make_shared<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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void SurfaceProxy::setColorBufferDirty()
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{
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for( const auto& rSurfacePtr : maSurfaceList )
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rSurfacePtr->setColorBufferDirty();
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}
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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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for( const auto& rSurfacePtr : maSurfaceList )
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rSurfacePtr->draw( fAlpha, rPos, rTransform );
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return true;
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}
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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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for( const auto& rSurfacePtr : maSurfaceList )
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rSurfacePtr->drawRectangularArea( fAlpha, rPos, rArea, rTransform );
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return true;
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}
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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::triangulator::B2DTriangleVector& rTriangulatedVector(
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::basegfx::triangulator::triangulate(rClipPoly));
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// we have now an explicit ::B2DTriangle and ::B2DTriangleVector,
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// but I do not know enough about 'drawWithClip' or 'clipTriangleListOnRange'
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// to adapt to that. Convert back to old three-point-in-polygon convention
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::basegfx::B2DPolygon aTriangulatedPolygon;
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aTriangulatedPolygon.reserve(rTriangulatedVector.size() * 3);
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for(const auto& rCandidate : rTriangulatedVector)
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{
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aTriangulatedPolygon.append(rCandidate.getA());
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aTriangulatedPolygon.append(rCandidate.getB());
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aTriangulatedPolygon.append(rCandidate.getC());
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}
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// dump polygons
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SAL_INFO("canvas", "Original clip polygon: " << basegfx::utils::exportToSvgD( rClipPoly, true, true, false ));
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SAL_INFO("canvas", "Triangulated polygon: " << basegfx::utils::exportToSvgD(basegfx::B2DPolyPolygon(aTriangulatedPolygon), true, true, false ));
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for( const auto& rSurfacePtr : maSurfaceList )
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rSurfacePtr->drawWithClip( fAlpha, rPos, aTriangulatedPolygon, 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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