Quake-III-Arena

Quake III Arena GPL Source Release
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jmemnobs.c (2667B)

      1 /*
      2  * jmemnobs.c
      3  *
      4  * Copyright (C) 1992-1994, Thomas G. Lane.
      5  * This file is part of the Independent JPEG Group's software.
      6  * For conditions of distribution and use, see the accompanying README file.
      7  *
      8  * This file provides a really simple implementation of the system-
      9  * dependent portion of the JPEG memory manager.  This implementation
     10  * assumes that no backing-store files are needed: all required space
     11  * can be obtained from ri.Malloc().
     12  * This is very portable in the sense that it'll compile on almost anything,
     13  * but you'd better have lots of main memory (or virtual memory) if you want
     14  * to process big images.
     15  * Note that the max_memory_to_use option is ignored by this implementation.
     16  */
     17 
     18 #define JPEG_INTERNALS
     19 #include "jinclude.h"
     20 #include "jpeglib.h"
     21 #include "jmemsys.h"		/* import the system-dependent declarations */
     22 
     23 #include "../renderer/tr_local.h"
     24 
     25 /*
     26  * Memory allocation and ri.Freeing are controlled by the regular library
     27  * routines ri.Malloc() and ri.Free().
     28  */
     29 
     30 GLOBAL void *
     31 jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
     32 {
     33   return (void *) ri.Malloc(sizeofobject);
     34 }
     35 
     36 GLOBAL void
     37 jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
     38 {
     39   ri.Free(object);
     40 }
     41 
     42 
     43 /*
     44  * "Large" objects are treated the same as "small" ones.
     45  * NB: although we include FAR keywords in the routine declarations,
     46  * this file won't actually work in 80x86 small/medium model; at least,
     47  * you probably won't be able to process useful-size images in only 64KB.
     48  */
     49 
     50 GLOBAL void FAR *
     51 jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
     52 {
     53   return (void FAR *) ri.Malloc(sizeofobject);
     54 }
     55 
     56 GLOBAL void
     57 jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
     58 {
     59   ri.Free(object);
     60 }
     61 
     62 
     63 /*
     64  * This routine computes the total memory space available for allocation.
     65  * Here we always say, "we got all you want bud!"
     66  */
     67 
     68 GLOBAL long
     69 jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
     70 		    long max_bytes_needed, long already_allocated)
     71 {
     72   return max_bytes_needed;
     73 }
     74 
     75 
     76 /*
     77  * Backing store (temporary file) management.
     78  * Since jpeg_mem_available always promised the moon,
     79  * this should never be called and we can just error out.
     80  */
     81 
     82 GLOBAL void
     83 jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
     84 			 long total_bytes_needed)
     85 {
     86   ERREXIT(cinfo, JERR_NO_BACKING_STORE);
     87 }
     88 
     89 
     90 /*
     91  * These routines take care of any system-dependent initialization and
     92  * cleanup required.  Here, there isn't any.
     93  */
     94 
     95 GLOBAL long
     96 jpeg_mem_init (j_common_ptr cinfo)
     97 {
     98   return 0;			/* just set max_memory_to_use to 0 */
     99 }
    100 
    101 GLOBAL void
    102 jpeg_mem_term (j_common_ptr cinfo)
    103 {
    104   /* no work */
    105 }