mirror of
https://github.com/nillerusr/source-engine.git
synced 2024-12-23 06:36:54 +00:00
347 lines
9.9 KiB
C
347 lines
9.9 KiB
C
/***************************************************************************/
|
|
/* */
|
|
/* ftsystem.h */
|
|
/* */
|
|
/* FreeType low-level system interface definition (specification). */
|
|
/* */
|
|
/* Copyright 1996-2001, 2002, 2005 by */
|
|
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
|
|
/* */
|
|
/* This file is part of the FreeType project, and may only be used, */
|
|
/* modified, and distributed under the terms of the FreeType project */
|
|
/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
|
|
/* this file you indicate that you have read the license and */
|
|
/* understand and accept it fully. */
|
|
/* */
|
|
/***************************************************************************/
|
|
|
|
|
|
#ifndef __FTSYSTEM_H__
|
|
#define __FTSYSTEM_H__
|
|
|
|
|
|
#include <ft2build.h>
|
|
|
|
|
|
FT_BEGIN_HEADER
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Section> */
|
|
/* system_interface */
|
|
/* */
|
|
/* <Title> */
|
|
/* System Interface */
|
|
/* */
|
|
/* <Abstract> */
|
|
/* How FreeType manages memory and i/o. */
|
|
/* */
|
|
/* <Description> */
|
|
/* This section contains various definitions related to memory */
|
|
/* management and i/o access. You need to understand this */
|
|
/* information if you want to use a custom memory manager or you own */
|
|
/* i/o streams. */
|
|
/* */
|
|
/*************************************************************************/
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* M E M O R Y M A N A G E M E N T */
|
|
/* */
|
|
/*************************************************************************/
|
|
|
|
|
|
/*************************************************************************
|
|
*
|
|
* @type:
|
|
* FT_Memory
|
|
*
|
|
* @description:
|
|
* A handle to a given memory manager object, defined with an
|
|
* @FT_MemoryRec structure.
|
|
*
|
|
*/
|
|
typedef struct FT_MemoryRec_* FT_Memory;
|
|
|
|
|
|
/*************************************************************************
|
|
*
|
|
* @functype:
|
|
* FT_Alloc_Func
|
|
*
|
|
* @description:
|
|
* A function used to allocate `size' bytes from `memory'.
|
|
*
|
|
* @input:
|
|
* memory ::
|
|
* A handle to the source memory manager.
|
|
*
|
|
* size ::
|
|
* The size in bytes to allocate.
|
|
*
|
|
* @return:
|
|
* Address of new memory block. 0 in case of failure.
|
|
*
|
|
*/
|
|
typedef void*
|
|
(*FT_Alloc_Func)( FT_Memory memory,
|
|
long size );
|
|
|
|
|
|
/*************************************************************************
|
|
*
|
|
* @functype:
|
|
* FT_Free_Func
|
|
*
|
|
* @description:
|
|
* A function used to release a given block of memory.
|
|
*
|
|
* @input:
|
|
* memory ::
|
|
* A handle to the source memory manager.
|
|
*
|
|
* block ::
|
|
* The address of the target memory block.
|
|
*
|
|
*/
|
|
typedef void
|
|
(*FT_Free_Func)( FT_Memory memory,
|
|
void* block );
|
|
|
|
|
|
/*************************************************************************
|
|
*
|
|
* @functype:
|
|
* FT_Realloc_Func
|
|
*
|
|
* @description:
|
|
* A function used to re-allocate a given block of memory.
|
|
*
|
|
* @input:
|
|
* memory ::
|
|
* A handle to the source memory manager.
|
|
*
|
|
* cur_size ::
|
|
* The block's current size in bytes.
|
|
*
|
|
* new_size ::
|
|
* The block's requested new size.
|
|
*
|
|
* block ::
|
|
* The block's current address.
|
|
*
|
|
* @return:
|
|
* New block address. 0 in case of memory shortage.
|
|
*
|
|
* @note:
|
|
* In case of error, the old block must still be available.
|
|
*
|
|
*/
|
|
typedef void*
|
|
(*FT_Realloc_Func)( FT_Memory memory,
|
|
long cur_size,
|
|
long new_size,
|
|
void* block );
|
|
|
|
|
|
/*************************************************************************
|
|
*
|
|
* @struct:
|
|
* FT_MemoryRec
|
|
*
|
|
* @description:
|
|
* A structure used to describe a given memory manager to FreeType 2.
|
|
*
|
|
* @fields:
|
|
* user ::
|
|
* A generic typeless pointer for user data.
|
|
*
|
|
* alloc ::
|
|
* A pointer type to an allocation function.
|
|
*
|
|
* free ::
|
|
* A pointer type to an memory freeing function.
|
|
*
|
|
* realloc ::
|
|
* A pointer type to a reallocation function.
|
|
*
|
|
*/
|
|
struct FT_MemoryRec_
|
|
{
|
|
void* user;
|
|
FT_Alloc_Func alloc;
|
|
FT_Free_Func free;
|
|
FT_Realloc_Func realloc;
|
|
};
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* I / O M A N A G E M E N T */
|
|
/* */
|
|
/*************************************************************************/
|
|
|
|
|
|
/*************************************************************************
|
|
*
|
|
* @type:
|
|
* FT_Stream
|
|
*
|
|
* @description:
|
|
* A handle to an input stream.
|
|
*
|
|
*/
|
|
typedef struct FT_StreamRec_* FT_Stream;
|
|
|
|
|
|
/*************************************************************************
|
|
*
|
|
* @struct:
|
|
* FT_StreamDesc
|
|
*
|
|
* @description:
|
|
* A union type used to store either a long or a pointer. This is used
|
|
* to store a file descriptor or a `FILE*' in an input stream.
|
|
*
|
|
*/
|
|
typedef union FT_StreamDesc_
|
|
{
|
|
long value;
|
|
void* pointer;
|
|
|
|
} FT_StreamDesc;
|
|
|
|
|
|
/*************************************************************************
|
|
*
|
|
* @functype:
|
|
* FT_Stream_IoFunc
|
|
*
|
|
* @description:
|
|
* A function used to seek and read data from a given input stream.
|
|
*
|
|
* @input:
|
|
* stream ::
|
|
* A handle to the source stream.
|
|
*
|
|
* offset ::
|
|
* The offset of read in stream (always from start).
|
|
*
|
|
* buffer ::
|
|
* The address of the read buffer.
|
|
*
|
|
* count ::
|
|
* The number of bytes to read from the stream.
|
|
*
|
|
* @return:
|
|
* The number of bytes effectively read by the stream.
|
|
*
|
|
* @note:
|
|
* This function might be called to perform a seek or skip operation
|
|
* with a `count' of 0.
|
|
*
|
|
*/
|
|
typedef unsigned long
|
|
(*FT_Stream_IoFunc)( FT_Stream stream,
|
|
unsigned long offset,
|
|
unsigned char* buffer,
|
|
unsigned long count );
|
|
|
|
|
|
/*************************************************************************
|
|
*
|
|
* @functype:
|
|
* FT_Stream_CloseFunc
|
|
*
|
|
* @description:
|
|
* A function used to close a given input stream.
|
|
*
|
|
* @input:
|
|
* stream ::
|
|
* A handle to the target stream.
|
|
*
|
|
*/
|
|
typedef void
|
|
(*FT_Stream_CloseFunc)( FT_Stream stream );
|
|
|
|
|
|
/*************************************************************************
|
|
*
|
|
* @struct:
|
|
* FT_StreamRec
|
|
*
|
|
* @description:
|
|
* A structure used to describe an input stream.
|
|
*
|
|
* @input:
|
|
* base ::
|
|
* For memory-based streams, this is the address of the first stream
|
|
* byte in memory. This field should always be set to NULL for
|
|
* disk-based streams.
|
|
*
|
|
* size ::
|
|
* The stream size in bytes.
|
|
*
|
|
* pos ::
|
|
* The current position within the stream.
|
|
*
|
|
* descriptor ::
|
|
* This field is a union that can hold an integer or a pointer. It is
|
|
* used by stream implementations to store file descriptors or `FILE*'
|
|
* pointers.
|
|
*
|
|
* pathname ::
|
|
* This field is completely ignored by FreeType. However, it is often
|
|
* useful during debugging to use it to store the stream's filename
|
|
* (where available).
|
|
*
|
|
* read ::
|
|
* The stream's input function.
|
|
*
|
|
* close ::
|
|
* The stream;s close function.
|
|
*
|
|
* memory ::
|
|
* The memory manager to use to preload frames. This is set
|
|
* internally by FreeType and shouldn't be touched by stream
|
|
* implementations.
|
|
*
|
|
* cursor ::
|
|
* This field is set and used internally by FreeType when parsing
|
|
* frames.
|
|
*
|
|
* limit ::
|
|
* This field is set and used internally by FreeType when parsing
|
|
* frames.
|
|
*
|
|
*/
|
|
typedef struct FT_StreamRec_
|
|
{
|
|
unsigned char* base;
|
|
unsigned long size;
|
|
unsigned long pos;
|
|
|
|
FT_StreamDesc descriptor;
|
|
FT_StreamDesc pathname;
|
|
FT_Stream_IoFunc read;
|
|
FT_Stream_CloseFunc close;
|
|
|
|
FT_Memory memory;
|
|
unsigned char* cursor;
|
|
unsigned char* limit;
|
|
|
|
} FT_StreamRec;
|
|
|
|
|
|
/* */
|
|
|
|
|
|
FT_END_HEADER
|
|
|
|
#endif /* __FTSYSTEM_H__ */
|
|
|
|
|
|
/* END */
|