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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
 *
 ************************************************************************/


#include "rtl/alloc.h"
#include <vcl/graph.hxx>
#include <vcl/bmpacc.hxx>
#include <vcl/svapp.hxx>
#include <svtools/fltcall.hxx>
#include <svl/solar.hrc>
#include <svtools/FilterConfigItem.hxx>

//============================ PCDReader ==================================

// Diese Aufloesungen sind in einer PCD-Datei enthalten:
enum PCDResolution {
    PCDRES_BASE16,  //  192 x  128
    PCDRES_BASE4,   //  384 x  256
    PCDRES_BASE,    //  768 x  512
    // Die folgenden sind komprimiert und koennen
    // von uns NICHT gelesen werden:
    PCDRES_4BASE,   // 1536 x 1024
    PCDRES_16BASE   // 3072 x 3072
};

class PCDReader {

private:

    sal_Bool bStatus;

    sal_uLong               nLastPercent;

    SvStream &m_rPCD;
    BitmapWriteAccess*  mpAcc;

    sal_uInt8               nOrientation;   // Ausrichtung des Bildes in der PCD-Datei:
                                        // 0 - Turmspitze zeigt nach oben
                                        // 1 - Turmspitze zeigt nach rechts
                                        // 2 - Turmspitze zeigt nach unten
                                        // 3 - Turmspitze zeigt nach links

    PCDResolution       eResolution;    // Welche Aufloesung wir haben wollen

    sal_uLong               nWidth;         // Breite des PCD-Bildes
    sal_uLong               nHeight;        // Hoehe des PCD-Bildes
    sal_uLong               nImagePos;      // Position des Bildes in der PCD-Datei

    // Temporare BLue-Green-Red-Bitmap
    sal_uLong               nBMPWidth;
    sal_uLong               nBMPHeight;

    void    MayCallback(sal_uLong nPercent);

    void    CheckPCDImagePacFile();
        // Prueft, ob es eine Photo-CD-Datei mit 'Image Pac' ist.

    void    ReadOrientation();
        // Liest die Ausrichtung und setzt nOrientation

    void    ReadImage(sal_uLong nMinPercent, sal_uLong nMaxPercent);

public:

    PCDReader(SvStream &rStream)<--- Member variable 'PCDReader::mpAcc' is not initialized in the constructor.<--- Member variable 'PCDReader::eResolution' is not initialized in the constructor.
        : m_rPCD(rStream)
    {
    }
    ~PCDReader() {}

    sal_Bool ReadPCD( Graphic & rGraphic, FilterConfigItem* pConfigItem );
};

//=================== Methoden von PCDReader ==============================

sal_Bool PCDReader::ReadPCD( Graphic & rGraphic, FilterConfigItem* pConfigItem )
{
    Bitmap       aBmp;

    bStatus      = sal_True;
    nLastPercent = 0;

    MayCallback( 0 );

    // Ist es eine PCD-Datei mit Bild ? ( setzt bStatus == sal_False, wenn nicht ):
    CheckPCDImagePacFile();

    // Orientierung des Bildes einlesen:
    ReadOrientation();

    // Welche Aufloesung wollen wir ?:
    eResolution = PCDRES_BASE;
    if ( pConfigItem )
    {
        sal_Int32 nResolution = pConfigItem->ReadInt32( String( RTL_CONSTASCII_USTRINGPARAM( "Resolution" ) ), 2 );
        if ( nResolution == 1 )
            eResolution = PCDRES_BASE4;
        else if ( nResolution == 0 )
            eResolution = PCDRES_BASE16;
    }
    // Groesse und Position (Position in PCD-Datei) des Bildes bestimmen:
    switch (eResolution)
    {
        case PCDRES_BASE16 :
            nWidth = 192;
            nHeight = 128;
            nImagePos = 8192;
            break;

        case PCDRES_BASE4 :
            nWidth = 384;
            nHeight = 256;
            nImagePos = 47104;
            break;

        case PCDRES_BASE :
            nWidth = 768;
            nHeight = 512;
            nImagePos = 196608;
            break;

        default:
            bStatus = sal_False;
    }
    if ( bStatus )
    {
        if ( ( nOrientation & 0x01 ) == 0 )
        {
            nBMPWidth = nWidth;
            nBMPHeight = nHeight;
        }
        else
        {
            nBMPWidth = nHeight;
            nBMPHeight = nWidth;
        }
        aBmp = Bitmap( Size( nBMPWidth, nBMPHeight ), 24 );
        if ( ( mpAcc = aBmp.AcquireWriteAccess() ) == sal_False )
            return sal_False;

        ReadImage( 5 ,65 );

        aBmp.ReleaseAccess( mpAcc ), mpAcc = NULL;
        rGraphic = aBmp;
    }
    return bStatus;
}

// -------------------------------------------------------------------------------------------

void PCDReader::MayCallback(sal_uLong /*nPercent*/)
{
/*
    if ( nPercent >= nLastPercent + 3 )
    {
        nLastPercent=nPercent;
        if ( pCallback != NULL && nPercent <= 100 && bStatus == sal_True )
        {
            if ( ( (*pCallback)( pCallerData, (sal_uInt16)nPercent ) ) == sal_True )
                bStatus = sal_False;
        }
    }
*/
}

// -------------------------------------------------------------------------------------------

void PCDReader::CheckPCDImagePacFile()
{
    char Buf[ 8 ];

    m_rPCD.Seek( 2048 );
    m_rPCD.Read( Buf, 7 );
    Buf[ 7 ] = 0;
    if (!rtl::OString(Buf).equalsL(RTL_CONSTASCII_STRINGPARAM("PCD_IPI")))
        bStatus = sal_False;
}

// -------------------------------------------------------------------------------------------

void PCDReader::ReadOrientation()
{
    if ( bStatus == sal_False )
        return;
    m_rPCD.Seek( 194635 );
    m_rPCD >> nOrientation;
    nOrientation &= 0x03;
}

// -------------------------------------------------------------------------------------------

void PCDReader::ReadImage(sal_uLong nMinPercent, sal_uLong nMaxPercent)
{
    sal_uLong  nx,ny,nW2,nH2,nYPair,ndy,nXPair;
    long   nL,nCb,nCr,nRed,nGreen,nBlue;
    sal_uInt8 * pt;
    sal_uInt8 * pL0; // Luminanz fuer jeden Pixel der 1. Zeile des aktuellen Zeilen-Paars
    sal_uInt8 * pL1; // Luminanz fuer jeden Pixel der 2. Zeile des aktuellen Zeilen-Paars
    sal_uInt8 * pCb; // Blau-Chrominanz fuer je 2x2 Pixel des aktuellen Zeilen-Paars
    sal_uInt8 * pCr; // Rot-Chrominanz fuer je 2x2 Pixel des aktuellen Zeilen-Paars
    sal_uInt8 * pL0N, * pL1N, * pCbN, * pCrN; // wie oben, nur fuer das naechste Zeilen-Paar

    if ( bStatus == sal_False )
        return;

    nW2=nWidth>>1;
    nH2=nHeight>>1;

    pL0 =(sal_uInt8*)rtl_allocateMemory( nWidth );
    pL1 =(sal_uInt8*)rtl_allocateMemory( nWidth );
    pCb =(sal_uInt8*)rtl_allocateMemory( nW2+1 );
    pCr =(sal_uInt8*)rtl_allocateMemory( nW2+1 );
    pL0N=(sal_uInt8*)rtl_allocateMemory( nWidth );
    pL1N=(sal_uInt8*)rtl_allocateMemory( nWidth );
    pCbN=(sal_uInt8*)rtl_allocateMemory( nW2+1 );
    pCrN=(sal_uInt8*)rtl_allocateMemory( nW2+1 );

    if ( pL0 == NULL || pL1 == NULL || pCb == NULL || pCr == NULL ||
        pL0N == NULL || pL1N == NULL || pCbN == NULL || pCrN == NULL)
    {
        rtl_freeMemory((void*)pL0 );
        rtl_freeMemory((void*)pL1 );
        rtl_freeMemory((void*)pCb );
        rtl_freeMemory((void*)pCr );
        rtl_freeMemory((void*)pL0N);
        rtl_freeMemory((void*)pL1N);
        rtl_freeMemory((void*)pCbN);
        rtl_freeMemory((void*)pCrN);
        bStatus = sal_False;
        return;
    }

    m_rPCD.Seek( nImagePos );

    // naechstes Zeilen-Paar := erstes Zeile-Paar:
    m_rPCD.Read( pL0N, nWidth );
    m_rPCD.Read( pL1N, nWidth );
    m_rPCD.Read( pCbN, nW2 );
    m_rPCD.Read( pCrN, nW2 );
    pCbN[ nW2 ] = pCbN[ nW2 - 1 ];
    pCrN[ nW2 ] = pCrN[ nW2 - 1 ];

    for ( nYPair = 0; nYPair < nH2; nYPair++ )
    {
        // aktuelles Zeilen-Paar := naechstes Zeilen-Paar
        pt=pL0; pL0=pL0N; pL0N=pt;
        pt=pL1; pL1=pL1N; pL1N=pt;
        pt=pCb; pCb=pCbN; pCbN=pt;
        pt=pCr; pCr=pCrN; pCrN=pt;

        // naechstes Zeilen-Paar holen:
        if ( nYPair < nH2 - 1 )
        {
            m_rPCD.Read( pL0N, nWidth );
            m_rPCD.Read( pL1N, nWidth );
            m_rPCD.Read( pCbN, nW2 );
            m_rPCD.Read( pCrN, nW2 );
            pCbN[nW2]=pCbN[ nW2 - 1 ];
            pCrN[nW2]=pCrN[ nW2 - 1 ];
        }
        else
        {
            for ( nXPair = 0; nXPair < nW2; nXPair++ )
            {
                pCbN[ nXPair ] = pCb[ nXPair ];
                pCrN[ nXPair ] = pCr[ nXPair ];
            }
        }

        // Schleife uber die beiden Zeilen des Zeilen-Paars:
        for ( ndy = 0; ndy < 2; ndy++ )
        {
            ny = ( nYPair << 1 ) + ndy;

            // Schleife ueber X:
            for ( nx = 0; nx < nWidth; nx++ )
            {
                // nL,nCb,nCr fuer den Pixel nx,ny holen/berechenen:
                nXPair = nx >> 1;
                if ( ndy == 0 )
                {
                    nL = (long)pL0[ nx ];
                    if (( nx & 1 ) == 0 )
                    {
                        nCb = (long)pCb[ nXPair ];
                        nCr = (long)pCr[ nXPair ];
                    }
                    else
                    {
                        nCb = ( ( (long)pCb[ nXPair ] ) + ( (long)pCb[ nXPair + 1 ] ) ) >> 1;
                        nCr = ( ( (long)pCr[ nXPair ] ) + ( (long)pCr[ nXPair + 1 ] ) ) >> 1;
                    }
                }
                else {
                    nL = pL1[ nx ];
                    if ( ( nx & 1 ) == 0 )
                    {
                        nCb = ( ( (long)pCb[ nXPair ] ) + ( (long)pCbN[ nXPair ] ) ) >> 1;
                        nCr = ( ( (long)pCr[ nXPair ] ) + ( (long)pCrN[ nXPair ] ) ) >> 1;
                    }
                    else
                    {
                        nCb = ( ( (long)pCb[ nXPair ] ) + ( (long)pCb[ nXPair + 1 ] ) +
                               ( (long)pCbN[ nXPair ] ) + ( (long)pCbN[ nXPair + 1 ] ) ) >> 2;
                        nCr = ( ( (long)pCr[ nXPair ] ) + ( (long)pCr[ nXPair + 1] ) +
                               ( (long)pCrN[ nXPair ] ) + ( (long)pCrN[ nXPair + 1 ] ) ) >> 2;
                    }
                }
                // Umwandlung von nL,nCb,nCr in nRed,nGreen,nBlue:
                nL *= 89024L;
                nCb -= 156;
                nCr -= 137;
                nRed = ( nL + nCr * 119374L + 0x8000 ) >> 16;
                if ( nRed < 0 )
                    nRed = 0;
                if ( nRed > 255)
                    nRed = 255;
                nGreen = ( nL - nCb * 28198L - nCr * 60761L + 0x8000 ) >> 16;
                if ( nGreen < 0 )
                    nGreen = 0;
                if ( nGreen > 255 )
                    nGreen = 255;
                nBlue = ( nL + nCb * 145352L + 0x8000 ) >> 16;
                if ( nBlue < 0 )
                    nBlue = 0;
                if ( nBlue > 255 )
                    nBlue = 255;

                // Farbwert in pBMPMap eintragen:
                if ( nOrientation < 2 )
                {
                    if ( nOrientation == 0 )
                        mpAcc->SetPixel( ny, nx, BitmapColor( (sal_uInt8)nRed, (sal_uInt8)nGreen, (sal_uInt8)nBlue ) );
                    else
                        mpAcc->SetPixel( nWidth - 1 - nx, ny, BitmapColor( (sal_uInt8)nRed, (sal_uInt8)nGreen, (sal_uInt8)nBlue ) );
                }
                else
                {
                    if ( nOrientation == 2 )
                        mpAcc->SetPixel( nHeight - 1 - ny, ( nWidth - 1 - nx ), BitmapColor( (sal_uInt8)nRed, (sal_uInt8)nGreen, (sal_uInt8)nBlue ) );
                    else
                        mpAcc->SetPixel( nx, ( nHeight - 1 - ny ), BitmapColor( (sal_uInt8)nRed, (sal_uInt8)nGreen, (sal_uInt8)nBlue ) );
                }
            }
        }

        if ( m_rPCD.GetError() )
            bStatus = sal_False;
        MayCallback( nMinPercent + ( nMaxPercent - nMinPercent ) * nYPair / nH2 );
        if ( bStatus == sal_False )
            break;
    }
    rtl_freeMemory((void*)pL0 );
    rtl_freeMemory((void*)pL1 );
    rtl_freeMemory((void*)pCb );
    rtl_freeMemory((void*)pCr );
    rtl_freeMemory((void*)pL0N);
    rtl_freeMemory((void*)pL1N);
    rtl_freeMemory((void*)pCbN);
    rtl_freeMemory((void*)pCrN);
}

//================== GraphicImport - die exportierte Funktion ================

extern "C" SAL_DLLPUBLIC_EXPORT sal_Bool __LOADONCALLAPI
GraphicImport(SvStream & rStream, Graphic & rGraphic, FilterConfigItem* pConfigItem, sal_Bool)
{
    PCDReader aPCDReader(rStream);
    return aPCDReader.ReadPCD(rGraphic, pConfigItem);
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */