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Diffstat (limited to 'drawinglayer/source/tools/emfppath.cxx')
| -rw-r--r-- | drawinglayer/source/tools/emfppath.cxx | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/drawinglayer/source/tools/emfppath.cxx b/drawinglayer/source/tools/emfppath.cxx new file mode 100644 index 000000000..1f16c292c --- /dev/null +++ b/drawinglayer/source/tools/emfppath.cxx @@ -0,0 +1,228 @@ +/* -*- 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 <basegfx/point/b2dpoint.hxx> +#include <basegfx/polygon/b2dpolygon.hxx> +#include <basegfx/polygon/b2dpolypolygon.hxx> +#include <o3tl/safeint.hxx> +#include <sal/log.hxx> +#include "emfppath.hxx" + +namespace +{ + const unsigned char nTopBitInt7 = 0x80; + const unsigned char nSignBitInt7 = 0x40; + // include the sign bit so if it's negative we get + // that "missing" bit pre-set to 1 + const unsigned char nValueMaskInt7 = 0x7F; +} + +namespace emfplushelper +{ + // see 2.2.2.21 EmfPlusInteger7 + // 2.2.2.22 EmfPlusInteger15 + // and 2.2.2.37 EmfPlusPointR Object + static sal_Int16 GetEmfPlusInteger(SvStream& s) + { + unsigned char u8(0); + s.ReadUChar(u8); + + bool bIsEmfPlusInteger15 = u8 & nTopBitInt7; + bool bNegative = u8 & nSignBitInt7; + unsigned char val1 = u8 & nValueMaskInt7; + if (bNegative) + val1 |= nTopBitInt7; + if (!bIsEmfPlusInteger15) + { + return static_cast<signed char>(val1); + } + + s.ReadUChar(u8); + sal_uInt16 nRet = (val1 << 8) | u8; + return static_cast<sal_Int16>(nRet); + } + + EMFPPath::EMFPPath (sal_Int32 _nPoints, bool bLines) + { + if (_nPoints<0 || o3tl::make_unsigned(_nPoints)>SAL_MAX_INT32 / (2 * sizeof(float))) + { + _nPoints = SAL_MAX_INT32 / (2 * sizeof(float)); + } + + nPoints = _nPoints; + pPoints.reset( new float [nPoints*2] ); + + if (!bLines) + pPointTypes.reset( new sal_uInt8 [_nPoints] ); + } + + EMFPPath::~EMFPPath () + { + } + + void EMFPPath::Read (SvStream& s, sal_uInt32 pathFlags) + { + for (int i = 0; i < nPoints; i ++) + { + if (pathFlags & 0x800) + { + // EMFPlusPointR: points are stored in EMFPlusInteger7 or + // EMFPlusInteger15 objects, see section 2.2.2.21/22 + // If 0x800 bit is set, the 0x4000 bit is undefined and must be ignored + sal_Int32 x = GetEmfPlusInteger(s); + sal_Int32 y = GetEmfPlusInteger(s); + pPoints [i*2] = x; + pPoints [i*2 + 1] = y; + SAL_INFO("drawinglayer", "EMF+\t\t\tEmfPlusPointR [x,y]: " << x << ", " << y); + } + else if (pathFlags & 0x4000) + { + // EMFPlusPoint: stored in signed short 16bit integer format + sal_Int16 x, y; + + s.ReadInt16( x ).ReadInt16( y ); + SAL_INFO ("drawinglayer", "EMF+\t\t\tEmfPlusPoint [x,y]: " << x << "," << y); + pPoints [i*2] = x; + pPoints [i*2 + 1] = y; + } + else + { + // EMFPlusPointF: stored in Single (float) format + s.ReadFloat( pPoints [i*2] ).ReadFloat( pPoints [i*2 + 1] ); + SAL_INFO ("drawinglayer", "EMF+\t EMFPlusPointF [x,y]: " << pPoints [i*2] << "," << pPoints [i*2 + 1]); + } + } + + if (pPointTypes) + { + for (int i = 0; i < nPoints; i++) + { + s.ReadUChar(pPointTypes[i]); + SAL_INFO("drawinglayer", "EMF+\tpoint type: " << static_cast<int>(pPointTypes[i])); + } + } + + aPolygon.clear(); + } + + ::basegfx::B2DPolyPolygon& EMFPPath::GetPolygon (EmfPlusHelperData const & rR, bool bMapIt, bool bAddLineToCloseShape) + { + ::basegfx::B2DPolygon polygon; + aPolygon.clear (); + int last_normal = 0, p = 0; + ::basegfx::B2DPoint prev, mapped; + bool hasPrev = false; + + for (int i = 0; i < nPoints; i ++) + { + if (p && pPointTypes && (pPointTypes [i] == 0)) + { + aPolygon.append (polygon); + last_normal = i; + p = 0; + polygon.clear (); + } + + if (bMapIt) + mapped = rR.Map (pPoints [i*2], pPoints [i*2 + 1]); + else + mapped = ::basegfx::B2DPoint (pPoints [i*2], pPoints [i*2 + 1]); + + if (pPointTypes) + { + if ((pPointTypes [i] & 0x07) == 3) + { + if (((i - last_normal )% 3) == 1) + { + polygon.setNextControlPoint (p - 1, mapped); + SAL_INFO ("drawinglayer", "EMF+\t\tPolygon append next: " << p - 1 << " mapped: " << mapped.getX () << "," << mapped.getY ()); + continue; + } + else if (((i - last_normal) % 3) == 2) + { + prev = mapped; + hasPrev = true; + continue; + } + } + else + { + last_normal = i; + } + } + + polygon.append (mapped); + SAL_INFO ("drawinglayer", "EMF+\t\tPolygon append point: " << pPoints [i*2] << "," << pPoints [i*2 + 1] << " mapped: " << mapped.getX () << ":" << mapped.getY ()); + + if (hasPrev) + { + polygon.setPrevControlPoint (p, prev); + SAL_INFO ("drawinglayer", "EMF+\t\tPolygon append prev: " << p << " mapped: " << prev.getX () << "," << prev.getY ()); + hasPrev = false; + } + + p ++; + + if (pPointTypes && (pPointTypes [i] & 0x80)) + { + // closed polygon + polygon.setClosed (true); + aPolygon.append (polygon); + SAL_INFO ("drawinglayer", "EMF+\t\tClose polygon"); + last_normal = i + 1; + p = 0; + polygon.clear (); + } + } + + // Draw an extra line between the last point and the first point, to close the shape. + if (bAddLineToCloseShape) + { + polygon.setClosed (true); + } + + if (polygon.count ()) + { + aPolygon.append (polygon); + +#if OSL_DEBUG_LEVEL > 1 + for (unsigned int i=0; i<aPolygon.count(); i++) { + polygon = aPolygon.getB2DPolygon(i); + SAL_INFO ("drawinglayer", "EMF+\t\tPolygon: " << i); + for (unsigned int j=0; j<polygon.count(); j++) { + ::basegfx::B2DPoint point = polygon.getB2DPoint(j); + SAL_INFO ("drawinglayer", "EMF+\t\t\tPoint: " << point.getX() << "," << point.getY()); + if (polygon.isPrevControlPointUsed(j)) { + point = polygon.getPrevControlPoint(j); + SAL_INFO ("drawinglayer", "EMF+\t\t\tPrev: " << point.getX() << "," << point.getY()); + } + if (polygon.isNextControlPointUsed(j)) { + point = polygon.getNextControlPoint(j); + SAL_INFO ("drawinglayer", "EMF+\t\t\tNext: " << point.getX() << "," << point.getY()); + } + } + } +#endif + } + + return aPolygon; + } +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |