Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 94 insertions, 0 deletions

diff --git a/vcl/inc/fontsubset.hxx b/vcl/inc/fontsubset.hxx
new file mode 100644
index 000000000..54fa20946
--- /dev/null
+++ b/vcl/inc/fontsubset.hxx
@@ -0,0 +1,94 @@
+/* -*- 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 .
+ */
+
+#ifndef INCLUDED_VCL_INC_FONTSUBSET_HXX
+#define INCLUDED_VCL_INC_FONTSUBSET_HXX
+
+#include <rtl/ustring.hxx>
+#include <tools/gen.hxx>
+#include <o3tl/typed_flags_set.hxx>
+
+#include <vcl/dllapi.h>
+#include <vcl/glyphitem.hxx>
+
+namespace vcl { struct TrueTypeFont; }         ///< SFT's idea of a TTF font
+
+enum class FontType {
+    NO_FONT     = 0,
+    SFNT_TTF    = 1<<1,                     ///< SFNT container with TrueType glyphs
+    SFNT_CFF    = 1<<2,                     ///< SFNT container with CFF-container
+    TYPE1_PFA   = 1<<3,                     ///< PSType1 Postscript Font Ascii
+    TYPE1_PFB   = 1<<4,                     ///< PSType1 Postscript Font Binary
+    CFF_FONT    = 1<<5,                     ///< CFF-container with PSType2 glyphs
+    TYPE3_FONT  = 1<<6,                     ///< PSType3 Postscript font
+    TYPE42_FONT = 1<<7,                     ///< PSType42 wrapper for an SFNT_TTF
+    ANY_SFNT    = SFNT_TTF | SFNT_CFF,
+    ANY_TYPE1   = TYPE1_PFA | TYPE1_PFB
+};
+namespace o3tl {
+    template<> struct typed_flags<FontType> : is_typed_flags<FontType, (1<<8)-1> {};
+}
+
+class VCL_DLLPUBLIC FontSubsetInfo final
+{
+public:
+    explicit    FontSubsetInfo();
+                ~FontSubsetInfo();
+
+    void        LoadFont( FontType eInFontType,
+                    const unsigned char* pFontBytes, int nByteLength );
+    void        LoadFont( vcl::TrueTypeFont* pSftTrueTypeFont );
+
+    bool        CreateFontSubset( FontType nOutFontTypeMask,
+                    FILE* pOutFile, const char* pOutFontName,
+                    const sal_GlyphId* pGlyphIds, const sal_uInt8* pEncodedIds,
+                    int nReqGlyphCount, sal_Int32* pOutGlyphWidths = nullptr );
+
+public: // TODO: make subsetter results private and provide accessor methods instead
+        // subsetter-provided subset details needed by e.g. Postscript or PDF
+    OUString                m_aPSName;
+    int                     m_nAscent;          ///< all metrics in PS font units
+    int                     m_nDescent;
+    int                     m_nCapHeight;
+    tools::Rectangle               m_aFontBBox;
+    FontType                m_nFontType;        ///< font-type of subset result
+
+private:
+    // input-font-specific details
+    unsigned const char*    mpInFontBytes;
+    int                     mnInByteLength;
+    FontType                meInFontType;       ///< allowed mask of input font-types
+    vcl::TrueTypeFont*      mpSftTTFont;
+
+    // subset-request details
+    FontType                mnReqFontTypeMask;  ///< allowed subset-target font types
+    FILE*                   mpOutFile;
+    const char*             mpReqFontName;
+    const sal_GlyphId*      mpReqGlyphIds;
+    const sal_uInt8*        mpReqEncodedIds;
+    int                     mnReqGlyphCount;
+
+    bool    CreateFontSubsetFromCff( sal_Int32* pOutGlyphWidths );
+    bool    CreateFontSubsetFromSfnt( sal_Int32* pOutGlyphWidths );
+    static bool CreateFontSubsetFromType1( const sal_Int32* pOutGlyphWidths );
+};
+
+#endif // INCLUDED_VCL_INC_FONTSUBSET_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */