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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 .
*/
/**
* @file ttcr.hxx
* @brief TrueType font creator
*/
#ifndef INCLUDED_VCL_SOURCE_FONTSUBSET_TTCR_HXX
#define INCLUDED_VCL_SOURCE_FONTSUBSET_TTCR_HXX
#include <sft.hxx>
namespace vcl
{
struct TrueTypeCreator;
/* TrueType data types */
typedef struct {
sal_uInt16 aw;
sal_Int16 lsb;
} longHorMetrics;
/* A generic base class for all TrueType tables */
struct TrueTypeTable {
sal_uInt32 tag; /* table tag */
sal_uInt8 *rawdata; /* raw data allocated by GetRawData_*() */
void *data; /* table specific data */
};
/** Error codes for most functions */
enum TTCRErrCodes {
TTCR_OK, /**< no error */
TTCR_ZEROGLYPHS, /**< At least one glyph should be defined */
TTCR_UNKNOWN, /**< Unknown TrueType table */
TTCR_NONAMES, /**< 'name' table does not contain any names */
TTCR_NAMETOOLONG, /**< 'name' table is too long (string data > 64K) */
TTCR_POSTFORMAT /**< unsupported format of a 'post' table */
};
/**
* TrueTypeCreator constructor.
* Allocates all internal structures.
*/
void TrueTypeCreatorNewEmpty(sal_uInt32 tag, TrueTypeCreator **_this);
/**
* Adds a TrueType table to the TrueType creator.
*/
void AddTable(TrueTypeCreator *_this, TrueTypeTable *table);
/**
* Removes a TrueType table from the TrueType creator if it is stored there.
* It also calls a TrueTypeTable destructor.
* Note: all generic tables (with tag 0) will be removed if this function is
* called with the second argument of 0.
* @return value of SFErrCodes type
*/
void RemoveTable(TrueTypeCreator *_this, sal_uInt32 tag);
/**
* Writes a TrueType font generated by the TrueTypeCreator to a segment of
* memory that this method allocates. When it is not needed anymore the caller
* is supposed to call free() on it.
* @return value of SFErrCodes type
*/
SFErrCodes StreamToMemory(TrueTypeCreator *_this, sal_uInt8 **ptr, sal_uInt32 *length);
/**
* Writes a TrueType font generated by the TrueTypeCreator to a file
* @return value of SFErrCodes type
*/
SFErrCodes StreamToFile(TrueTypeCreator *_this, const char* fname);
/**
* This function converts the data of a TrueType table to a raw array of bytes.
* It may allocates the memory for it and returns the size of the raw data in bytes.
* If memory is allocated it does not need to be freed by the caller of this function,
* since the pointer to it is stored in the TrueTypeTable and it is freed by the destructor
* @return TTCRErrCode
*
*/
int GetRawData(TrueTypeTable *, sal_uInt8 **ptr, sal_uInt32 *len, sal_uInt32 *tag);
/**
*
* Creates a new raw TrueType table. The difference between this constructor and
* TrueTypeTableNew_tag constructors is that the latter create structured tables
* while this constructor just copies memory pointed to by ptr to its buffer
* and stores its length. This constructor is suitable for data that is not
* supposed to be processed in any way, just written to the resulting TTF file.
*/
TrueTypeTable *TrueTypeTableNew(sal_uInt32 tag,
sal_uInt32 nbytes,
const sal_uInt8* ptr);
/**
* Creates a new 'head' table for a TrueType font.
* Allocates memory for it. Since a lot of values in the 'head' table depend on the
* rest of the tables in the TrueType font this table should be the last one added
* to the font.
*/
TrueTypeTable *TrueTypeTableNew_head(sal_uInt32 fontRevision,
sal_uInt16 flags,
sal_uInt16 unitsPerEm,
const sal_uInt8 *created,
sal_uInt16 macStyle,
sal_uInt16 lowestRecPPEM,
sal_Int16 fontDirectionHint);
/**
* Creates a new 'hhea' table for a TrueType font.
* Allocates memory for it and stores it in the hhea pointer.
*/
TrueTypeTable *TrueTypeTableNew_hhea(sal_Int16 ascender,
sal_Int16 descender,
sal_Int16 linegap,
sal_Int16 caretSlopeRise,
sal_Int16 caretSlopeRun);
/**
* Creates a new empty 'loca' table for a TrueType font.
*
* INTERNAL: gets called only from ProcessTables();
*/
TrueTypeTable *TrueTypeTableNew_loca();
/**
* Creates a new 'maxp' table based on an existing maxp table.
* If maxp is 0, a new empty maxp table is created
* size specifies the size of existing maxp table for
* error-checking purposes
*/
TrueTypeTable *TrueTypeTableNew_maxp( const sal_uInt8* maxp, int size);
/**
* Creates a new empty 'glyf' table.
*/
TrueTypeTable *TrueTypeTableNew_glyf();
/**
* Creates a new empty 'cmap' table.
*/
TrueTypeTable *TrueTypeTableNew_cmap();
/**
* Creates a new 'name' table. If n != 0 the table gets populated by
* the Name Records stored in the nr array. This function allocates
* memory for its own copy of NameRecords, so nr array has to
* be explicitly deallocated when it is not needed.
*/
TrueTypeTable *TrueTypeTableNew_name(int n, NameRecord const *nr);
/**
* Creates a new 'post' table of one of the supported formats
*/
TrueTypeTable *TrueTypeTableNew_post(sal_Int32 format,
sal_Int32 italicAngle,
sal_Int16 underlinePosition,
sal_Int16 underlineThickness,
sal_uInt32 isFixedPitch);
// Table manipulation functions
/**
* Add a character/glyph pair to a cmap table
*/
void cmapAdd(TrueTypeTable *, sal_uInt32 id, sal_uInt32 c, sal_uInt32 g);
/**
* Add a glyph to a glyf table.
*
* @return glyphID of the glyph in the new font
*
* NOTE: This function does not duplicate GlyphData, so memory will be
* deallocated in the table destructor
*/
sal_uInt32 glyfAdd(TrueTypeTable *, GlyphData *glyphdata, TrueTypeFont *fnt);
/**
* Query the number of glyphs currently stored in the 'glyf' table
*
*/
sal_uInt32 glyfCount(const TrueTypeTable *);
} // namespace
extern "C"
{
/**
* Destructor for the TrueTypeTable object.
*/
void TrueTypeTableDispose(void *);
/**
* TrueTypeCreator destructor. It calls destructors for all TrueTypeTables added to it.
*/
void TrueTypeCreatorDispose(vcl::TrueTypeCreator *_this);
}
#endif // INCLUDED_VCL_SOURCE_FONTSUBSET_TTCR_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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