1 files changed, 163 insertions, 0 deletions
diff --git a/vcl/source/fontsubset/fontsubset.cxx b/vcl/source/fontsubset/fontsubset.cxx
new file mode 100644
index 000000000..bd663d8bc
--- /dev/null
+++ b/vcl/source/fontsubset/fontsubset.cxx
@@ -0,0 +1,163 @@
+/* -*- 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
+    sal_uInt32 nCffLength = 0;
+    const sal_uInt8* pCffBytes = mpSftTTFont->table(vcl::O_CFF, nCffLength);
+    if (pCffBytes)
+    {
+        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: */