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PL286/external/pdfium/public/fpdf_sysfontinfo.h

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// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#ifndef PUBLIC_FPDF_SYSFONTINFO_H_
#define PUBLIC_FPDF_SYSFONTINFO_H_
// NOLINTNEXTLINE(build/include)
#include "fpdfview.h"
/* Character sets for the font */
#define FXFONT_ANSI_CHARSET 0
#define FXFONT_DEFAULT_CHARSET 1
#define FXFONT_SYMBOL_CHARSET 2
#define FXFONT_SHIFTJIS_CHARSET 128
#define FXFONT_HANGEUL_CHARSET 129
#define FXFONT_GB2312_CHARSET 134
#define FXFONT_CHINESEBIG5_CHARSET 136
/* Font pitch and family flags */
#define FXFONT_FF_FIXEDPITCH 1
#define FXFONT_FF_ROMAN (1 << 4)
#define FXFONT_FF_SCRIPT (4 << 4)
/* Typical weight values */
#define FXFONT_FW_NORMAL 400
#define FXFONT_FW_BOLD 700
// Exported Functions
#ifdef __cplusplus
extern "C" {
#endif
/**
* Interface: FPDF_SYSFONTINFO
* Interface for getting system font information and font mapping
*/
typedef struct _FPDF_SYSFONTINFO {
/**
* Version number of the interface. Currently must be 1.
**/
int version;
/**
* Method: Release
* Give implementation a chance to release any data after the
* interface is no longer used
* Interface Version:
* 1
* Implementation Required:
* No
* Comments:
* Called by Foxit SDK during the final cleanup process.
* Parameters:
* pThis - Pointer to the interface structure itself
* Return Value:
* None
*/
void (*Release)(struct _FPDF_SYSFONTINFO* pThis);
/**
* Method: EnumFonts
* Enumerate all fonts installed on the system
* Interface Version:
* 1
* Implementation Required:
* No
* Comments:
* Implementation should call FPDF_AddIntalledFont() function for
* each font found.
* Only TrueType/OpenType and Type1 fonts are accepted by Foxit SDK.
* Parameters:
* pThis - Pointer to the interface structure itself
* pMapper - An opaque pointer to internal font mapper, used
* when calling FPDF_AddInstalledFont
* Return Value:
* None
*/
void (*EnumFonts)(struct _FPDF_SYSFONTINFO* pThis, void* pMapper);
/**
* Method: MapFont
* Use the system font mapper to get a font handle from requested
*parameters
* Interface Version:
* 1
* Implementation Required:
* Yes only if GetFont method is not implemented.
* Comments:
* If the system supports native font mapper (like Windows),
*implementation can implement this method to get a font handle.
* Otherwise, Foxit SDK will do the mapping and then call GetFont
*method.
* Only TrueType/OpenType and Type1 fonts are accepted by Foxit SDK.
* Parameters:
* pThis - Pointer to the interface structure itself
* weight - Weight of the requested font. 400 is normal and
*700 is bold.
* bItalic - Italic option of the requested font, TRUE or
*FALSE.
* charset - Character set identifier for the requested font.
*See above defined constants.
* pitch_family - A combination of flags. See above defined
*constants.
* face - Typeface name. Currently use system local encoding
*only.
* bExact - Pointer to a boolean value receiving the indicator
*whether mapper found the exact match.
* If mapper is not sure whether it's exact match,
*ignore this paramter.
* Return Value:
* An opaque pointer for font handle, or NULL if system mapping is
*not supported.
**/
void* (*MapFont)(struct _FPDF_SYSFONTINFO* pThis,
int weight,
FPDF_BOOL bItalic,
int charset,
int pitch_family,
const char* face,
FPDF_BOOL* bExact);
/**
* Method: GetFont
* Get a handle to a particular font by its internal ID
* Interface Version:
* 1
* Implementation Required:
* Yes only if MapFont method is not implemented.
* Comments:
* If the system mapping not supported, Foxit SDK will do the font
*mapping and use this method to get a font handle.
* Parameters:
* pThis - Pointer to the interface structure itself
* face - Typeface name. Currently use system local encoding
*only.
* Return Value:
* An opaque pointer for font handle.
**/
void* (*GetFont)(struct _FPDF_SYSFONTINFO* pThis, const char* face);
/**
* Method: GetFontData
* Get font data from a font
* Interface Version:
* 1
* Implementation Required:
* Yes
* Comments:
* Can read either full font file, or a particular TrueType/OpenType
*table
* Parameters:
* pThis - Pointer to the interface structure itself
* hFont - Font handle returned by MapFont or GetFont method
* table - TrueType/OpenType table identifier (refer to
*TrueType specification).
* 0 for the whole font file.
* buffer - The buffer receiving the font data. Can be NULL if
*not provided
* buf_size - Buffer size, can be zero if not provided
* Return Value:
* Number of bytes needed, if buffer not provided or not large
*enough,
* or number of bytes written into buffer otherwise.
**/
unsigned long (*GetFontData)(struct _FPDF_SYSFONTINFO* pThis,
void* hFont,
unsigned int table,
unsigned char* buffer,
unsigned long buf_size);
/**
* Method: GetFaceName
* Get face name from a font handle
* Interface Version:
* 1
* Implementation Required:
* No
* Parameters:
* pThis - Pointer to the interface structure itself
* hFont - Font handle returned by MapFont or GetFont method
* buffer - The buffer receiving the face name. Can be NULL if
*not provided
* buf_size - Buffer size, can be zero if not provided
* Return Value:
* Number of bytes needed, if buffer not provided or not large
*enough,
* or number of bytes written into buffer otherwise.
**/
unsigned long (*GetFaceName)(struct _FPDF_SYSFONTINFO* pThis,
void* hFont,
char* buffer,
unsigned long buf_size);
/**
* Method: GetFontCharset
* Get character set information for a font handle
* Interface Version:
* 1
* Implementation Required:
* No
* Parameters:
* pThis - Pointer to the interface structure itself
* hFont - Font handle returned by MapFont or GetFont method
* Return Value:
* Character set identifier. See defined constants above.
**/
int (*GetFontCharset)(struct _FPDF_SYSFONTINFO* pThis, void* hFont);
/**
* Method: DeleteFont
* Delete a font handle
* Interface Version:
* 1
* Implementation Required:
* Yes
* Parameters:
* pThis - Pointer to the interface structure itself
* hFont - Font handle returned by MapFont or GetFont method
* Return Value:
* None
**/
void (*DeleteFont)(struct _FPDF_SYSFONTINFO* pThis, void* hFont);
} FPDF_SYSFONTINFO;
/**
* Struct: FPDF_CharsetFontMap
* Provides the name of a font to use for a given charset value.
**/
typedef struct FPDF_CharsetFontMap_ {
int charset; // Character Set Enum value, see FXFONT_*_CHARSET above.
const char* fontname; // Name of default font to use with that charset.
} FPDF_CharsetFontMap;
/**
* Function: FPDF_GetDefaultTTFMap
* Returns a pointer to the default character set to TT Font name map. The
* map is an array of FPDF_CharsetFontMap structs, with its end indicated
* by a { -1, NULL } entry.
* Parameters:
* None.
* Return Value:
* Pointer to the Charset Font Map.
**/
DLLEXPORT const FPDF_CharsetFontMap* STDCALL FPDF_GetDefaultTTFMap();
/**
* Function: FPDF_AddInstalledFont
* Add a system font to the list in Foxit SDK.
* Comments:
* This function is only called during the system font list building
*process.
* Parameters:
* mapper - Opaque pointer to Foxit font mapper
* face - The font face name
* charset - Font character set. See above defined constants.
* Return Value:
* None.
**/
DLLEXPORT void STDCALL FPDF_AddInstalledFont(void* mapper,
const char* face,
int charset);
/**
* Function: FPDF_SetSystemFontInfo
* Set the system font info interface into Foxit SDK
* Comments:
* Platform support implementation should implement required methods of
*FFDF_SYSFONTINFO interface,
* then call this function during SDK initialization process.
* Parameters:
* pFontInfo - Pointer to a FPDF_SYSFONTINFO structure
* Return Value:
* None
**/
DLLEXPORT void STDCALL FPDF_SetSystemFontInfo(FPDF_SYSFONTINFO* pFontInfo);
/**
* Function: FPDF_GetDefaultSystemFontInfo
* Get default system font info interface for current platform
* Comments:
* For some platforms Foxit SDK implement a default version of system
*font info interface.
* The default implementation can be used in FPDF_SetSystemFontInfo
*function.
* Parameters:
* None
* Return Value:
* Pointer to a FPDF_SYSFONTINFO structure describing the default
*interface.
* Or NULL if the platform doesn't have a default interface.
* Application should call FPDF_FreeDefaultSystemFontInfo to free the
*returned pointer.
**/
DLLEXPORT FPDF_SYSFONTINFO* STDCALL FPDF_GetDefaultSystemFontInfo();
/**
* Function: FPDF_FreeDefaultSystemFontInfo
* Free a default system font info interface
* Comments:
* This function should be called on the output from
*FPDF_SetSystemFontInfo once it is no longer needed by the client.
* Parameters:
* pFontInfo - Pointer to a FPDF_SYSFONTINFO structure
* Return Value:
* None
**/
DLLEXPORT void FPDF_FreeDefaultSystemFontInfo(FPDF_SYSFONTINFO* pFontInfo);
#ifdef __cplusplus
}
#endif
#endif // PUBLIC_FPDF_SYSFONTINFO_H_