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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <sal/config.h>
#include <sal/log.hxx>
#include <basegfx/polygon/b2dpolypolygon.hxx>
#include <basegfx/polygon/b2dpolygontriangulator.hxx>
#include <basegfx/polygon/b2dpolypolygontools.hxx>
#include <utility>
#include "surfaceproxy.hxx"
namespace canvas
{
SurfaceProxy::SurfaceProxy( std::shared_ptr<canvas::IColorBuffer> xBuffer,
PageManagerSharedPtr xPageManager ) :
mpPageManager(std::move( xPageManager )),
mpBuffer(std::move( xBuffer ))
{
const ::basegfx::B2ISize aImageSize(mpBuffer->getWidth(),mpBuffer->getHeight());
const ::basegfx::B2ISize aPageSize(mpPageManager->getPageSize());
const sal_Int32 aPageSizeX(aPageSize.getX());
const sal_Int32 aPageSizeY(aPageSize.getY());
const sal_Int32 aImageSizeX(aImageSize.getX());
const sal_Int32 aImageSizeY(aImageSize.getY());
// see if the size of the colorbuffer is larger than the size
// of a single page. if this is the case we divide the
// colorbuffer into as many surfaces as we need to get the
// whole area distributed. otherwise (the colorbuffer is
// smaller than the size of a single page) we search for free
// pages or create a new one.
// the incoming image is too large to fit into a single
// page. strategy: we split the image into rectangular
// areas that are as large as the maximum page size
// dictates and follow the strategy for fitting images.
size_t dwNumSurfaces(0);
for(sal_Int32 y=0; y<aImageSizeY; y+=aPageSizeY)
for(sal_Int32 x=0; x<aImageSizeX; x+=aPageSizeX)
++dwNumSurfaces;
maSurfaceList.reserve(dwNumSurfaces);
for(sal_Int32 y=0; y<aImageSizeY; y+=aPageSizeY)
{
for(sal_Int32 x=0; x<aImageSizeX; x+=aPageSizeX)
{
// the current surface is located at the position [x,y]
// and has the size [min(restx,pagesizex),min(resty,pagesizey)
::basegfx::B2IPoint aOffset(x,y);
::basegfx::B2ISize aSize( std::min( aImageSize.getX()-x,
aPageSize.getX() ),
std::min( aImageSize.getY()-y,
aPageSize.getY() ) );
maSurfaceList.push_back(
std::make_shared<Surface>(
mpPageManager,
mpBuffer,
aOffset,
aSize));
}
}
}
void SurfaceProxy::setColorBufferDirty()
{
for( const auto& rSurfacePtr : maSurfaceList )
rSurfacePtr->setColorBufferDirty();
}
bool SurfaceProxy::draw( double fAlpha,
const ::basegfx::B2DPoint& rPos,
const ::basegfx::B2DHomMatrix& rTransform )
{
for( const auto& rSurfacePtr : maSurfaceList )
rSurfacePtr->draw( fAlpha, rPos, rTransform );
return true;
}
bool SurfaceProxy::draw( double fAlpha,
const ::basegfx::B2DPoint& rPos,
const ::basegfx::B2DRange& rArea,
const ::basegfx::B2DHomMatrix& rTransform )
{
for( const auto& rSurfacePtr : maSurfaceList )
rSurfacePtr->drawRectangularArea( fAlpha, rPos, rArea, rTransform );
return true;
}
bool SurfaceProxy::draw( double fAlpha,
const ::basegfx::B2DPoint& rPos,
const ::basegfx::B2DPolyPolygon& rClipPoly,
const ::basegfx::B2DHomMatrix& rTransform )
{
const ::basegfx::triangulator::B2DTriangleVector& rTriangulatedVector(
::basegfx::triangulator::triangulate(rClipPoly));
// we have now an explicit ::B2DTriangle and ::B2DTriangleVector,
// but I do not know enough about 'drawWithClip' or 'clipTriangleListOnRange'
// to adapt to that. Convert back to old three-point-in-polygon convention
::basegfx::B2DPolygon aTriangulatedPolygon;
aTriangulatedPolygon.reserve(rTriangulatedVector.size() * 3);
for(const auto& rCandidate : rTriangulatedVector)
{
aTriangulatedPolygon.append(rCandidate.getA());
aTriangulatedPolygon.append(rCandidate.getB());
aTriangulatedPolygon.append(rCandidate.getC());
}
// dump polygons
SAL_INFO("canvas", "Original clip polygon: " << basegfx::utils::exportToSvgD( rClipPoly, true, true, false ));
SAL_INFO("canvas", "Triangulated polygon: " << basegfx::utils::exportToSvgD(basegfx::B2DPolyPolygon(aTriangulatedPolygon), true, true, false ));
for( const auto& rSurfacePtr : maSurfaceList )
rSurfacePtr->drawWithClip( fAlpha, rPos, aTriangulatedPolygon, rTransform );
return true;
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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