mirror of
https://github.com/id-Software/DOOM-3-BFG.git
synced 2024-11-25 13:31:12 +00:00
91 lines
2.8 KiB
C++
91 lines
2.8 KiB
C++
/*
|
|
* jcomapi.c
|
|
*
|
|
* Copyright (C) 1994, Thomas G. Lane.
|
|
* This file is part of the Independent JPEG Group's software.
|
|
* For conditions of distribution and use, see the accompanying README file.
|
|
*
|
|
* This file contains application interface routines that are used for both
|
|
* compression and decompression.
|
|
*/
|
|
|
|
#define JPEG_INTERNALS
|
|
#include "jinclude.h"
|
|
#include "jpeglib.h"
|
|
|
|
|
|
/*
|
|
* Abort processing of a JPEG compression or decompression operation,
|
|
* but don't destroy the object itself.
|
|
*
|
|
* For this, we merely clean up all the nonpermanent memory pools.
|
|
* Note that temp files (virtual arrays) are not allowed to belong to
|
|
* the permanent pool, so we will be able to close all temp files here.
|
|
* Closing a data source or destination, if necessary, is the application's
|
|
* responsibility.
|
|
*/
|
|
|
|
GLOBAL void
|
|
jpeg_abort( j_common_ptr cinfo ) {
|
|
int pool;
|
|
|
|
/* Releasing pools in reverse order might help avoid fragmentation
|
|
* with some (brain-damaged) malloc libraries.
|
|
*/
|
|
for ( pool = JPOOL_NUMPOOLS - 1; pool > JPOOL_PERMANENT; pool-- ) {
|
|
( *cinfo->mem->free_pool )( cinfo, pool );
|
|
}
|
|
|
|
/* Reset overall state for possible reuse of object */
|
|
cinfo->global_state = ( cinfo->is_decompressor ? DSTATE_START : CSTATE_START );
|
|
}
|
|
|
|
|
|
/*
|
|
* Destruction of a JPEG object.
|
|
*
|
|
* Everything gets deallocated except the master jpeg_compress_struct itself
|
|
* and the error manager struct. Both of these are supplied by the application
|
|
* and must be freed, if necessary, by the application. (Often they are on
|
|
* the stack and so don't need to be freed anyway.)
|
|
* Closing a data source or destination, if necessary, is the application's
|
|
* responsibility.
|
|
*/
|
|
|
|
GLOBAL void
|
|
jpeg_destroy( j_common_ptr cinfo ) {
|
|
/* We need only tell the memory manager to release everything. */
|
|
/* NB: mem pointer is NULL if memory mgr failed to initialize. */
|
|
if ( cinfo->mem != NULL ) {
|
|
( *cinfo->mem->self_destruct )( cinfo );
|
|
}
|
|
cinfo->mem = NULL; /* be safe if jpeg_destroy is called twice */
|
|
cinfo->global_state = 0;/* mark it destroyed */
|
|
}
|
|
|
|
|
|
/*
|
|
* Convenience routines for allocating quantization and Huffman tables.
|
|
* (Would jutils.c be a more reasonable place to put these?)
|
|
*/
|
|
|
|
GLOBAL JQUANT_TBL *
|
|
jpeg_alloc_quant_table( j_common_ptr cinfo ) {
|
|
JQUANT_TBL * tbl;
|
|
|
|
tbl = (JQUANT_TBL *)
|
|
( *cinfo->mem->alloc_small )( cinfo, JPOOL_PERMANENT, SIZEOF( JQUANT_TBL ) );
|
|
tbl->sent_table = FALSE;/* make sure this is false in any new table */
|
|
return tbl;
|
|
}
|
|
|
|
|
|
GLOBAL JHUFF_TBL *
|
|
jpeg_alloc_huff_table( j_common_ptr cinfo ) {
|
|
JHUFF_TBL * tbl;
|
|
|
|
tbl = (JHUFF_TBL *)
|
|
( *cinfo->mem->alloc_small )( cinfo, JPOOL_PERMANENT, SIZEOF( JHUFF_TBL ) );
|
|
tbl->sent_table = FALSE;/* make sure this is false in any new table */
|
|
return tbl;
|
|
}
|