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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 <osl/diagnose.h>
#include <sal/log.hxx>
#include <fontsubset.hxx>
#include <sft.hxx>
FontSubsetInfo::FontSubsetInfo()
: m_nAscent( 0)
, m_nDescent( 0)
, m_nCapHeight( 0)
, m_nFontType( FontType::NO_FONT)
, mpInFontBytes( nullptr)
, mnInByteLength( 0)
, meInFontType( FontType::NO_FONT)
, mpSftTTFont( nullptr)
, mnReqFontTypeMask( FontType::NO_FONT )
, mpOutFile(nullptr)
, mpReqFontName(nullptr)
, mpReqGlyphIds(nullptr)
, mpReqEncodedIds(nullptr)
, mnReqGlyphCount(0)
{
}
FontSubsetInfo::~FontSubsetInfo()
{
}
// prepare subsetting for fonts where the input font file is mapped
void FontSubsetInfo::LoadFont(
FontType eInFontType,
const unsigned char* pInFontBytes, int nInByteLength)
{
SAL_WARN_IF( (mpSftTTFont != nullptr), "vcl", "Subset from SFT and from mapped font-file requested");
meInFontType = eInFontType;
mpInFontBytes = pInFontBytes;
mnInByteLength = nInByteLength;
}
// prepare subsetting for fonts that are known to the SFT-parser
void FontSubsetInfo::LoadFont( vcl::TrueTypeFont* pSftTTFont )
{
SAL_WARN_IF( (mpInFontBytes != nullptr), "vcl", "Subset from SFT and from mapped font-file requested");
mpSftTTFont = pSftTTFont;
meInFontType = FontType::ANY_SFNT;
}
bool FontSubsetInfo::CreateFontSubset(
FontType nReqFontTypeMask,
FILE* pOutFile, const char* pReqFontName,
const sal_GlyphId* pReqGlyphIds, const sal_uInt8* pReqEncodedIds, int nReqGlyphCount,
sal_Int32* pOutGlyphWidths)
{
// prepare request details needed by all underlying subsetters
mnReqFontTypeMask = nReqFontTypeMask;
mpOutFile = pOutFile;
mpReqFontName = pReqFontName;
mpReqGlyphIds = pReqGlyphIds;
mpReqEncodedIds = pReqEncodedIds;
mnReqGlyphCount = nReqGlyphCount;
// TODO: move the glyphid/encid/notdef reshuffling from the callers to here
// dispatch to underlying subsetters
bool bOK = false;
// TODO: better match available input-type to possible subset-types
switch( meInFontType) {
case FontType::SFNT_TTF:
case FontType::SFNT_CFF:
case FontType::ANY_SFNT:
bOK = CreateFontSubsetFromSfnt( pOutGlyphWidths);
break;
case FontType::CFF_FONT:
bOK = CreateFontSubsetFromCff( pOutGlyphWidths);
break;
case FontType::TYPE1_PFA:
case FontType::TYPE1_PFB:
case FontType::ANY_TYPE1:
bOK = CreateFontSubsetFromType1( pOutGlyphWidths);
break;
case FontType::NO_FONT:
default:
OSL_FAIL( "unhandled type in CreateFontSubset()");
break;
}
return bOK;
}
// TODO: move function to sft.cxx to replace dummy implementation
bool FontSubsetInfo::CreateFontSubsetFromSfnt( sal_Int32* pOutGlyphWidths )
{
// handle SFNT_CFF fonts
int nCffLength = 0;
const sal_uInt8* pCffBytes = nullptr;
if( GetSfntTable( mpSftTTFont, vcl::O_CFF, &pCffBytes, &nCffLength))
{
LoadFont( FontType::CFF_FONT, pCffBytes, nCffLength);
const bool bOK = CreateFontSubsetFromCff( pOutGlyphWidths);
return bOK;
}
// handle SFNT_TTF fonts
// by forwarding the subset request to AG's sft subsetter
#if 1 // TODO: remove conversion tp 16bit glyphids when sft-subsetter has been updated
std::vector<sal_uInt16> aShortGlyphIds;
aShortGlyphIds.reserve(mnReqGlyphCount);
for (int i = 0; i < mnReqGlyphCount; ++i)
aShortGlyphIds.push_back(static_cast<sal_uInt16>(mpReqGlyphIds[i]));
// remove const_cast when sft-subsetter is const-correct
sal_uInt8* pEncArray = const_cast<sal_uInt8*>( mpReqEncodedIds );
#endif
vcl::SFErrCodes nSFTErr = vcl::SFErrCodes::BadArg;
if( mnReqFontTypeMask & FontType::TYPE42_FONT )
{
nSFTErr = CreateT42FromTTGlyphs( mpSftTTFont, mpOutFile, mpReqFontName,
aShortGlyphIds.data(), pEncArray, mnReqGlyphCount );
}
else if( mnReqFontTypeMask & FontType::TYPE3_FONT )
{
nSFTErr = CreateT3FromTTGlyphs( mpSftTTFont, mpOutFile, mpReqFontName,
aShortGlyphIds.data(), pEncArray, mnReqGlyphCount,
0 /* 0 = horizontal, 1 = vertical */ );
}
else if( mnReqFontTypeMask & FontType::SFNT_TTF )
{
// TODO: use CreateTTFromTTGlyphs()
// TODO: move functionality from callers here
}
return (nSFTErr != vcl::SFErrCodes::Ok);
}
// TODO: replace dummy implementation
bool FontSubsetInfo::CreateFontSubsetFromType1( const sal_Int32* /*pOutGlyphWidths*/)
{
SAL_WARN("vcl.fonts",
"CreateFontSubsetFromType1: replace dummy implementation.");
return false;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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