diff options
Diffstat (limited to '')
-rw-r--r-- | libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jmemmac.c | 289 |
1 files changed, 289 insertions, 0 deletions
diff --git a/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jmemmac.c b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jmemmac.c new file mode 100644 index 0000000..a6f043e --- /dev/null +++ b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jmemmac.c | |||
@@ -0,0 +1,289 @@ | |||
1 | /* | ||
2 | * jmemmac.c | ||
3 | * | ||
4 | * Copyright (C) 1992-1997, 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 | * jmemmac.c provides an Apple Macintosh implementation of the system- | ||
9 | * dependent portion of the JPEG memory manager. | ||
10 | * | ||
11 | * If you use jmemmac.c, then you must define USE_MAC_MEMMGR in the | ||
12 | * JPEG_INTERNALS part of jconfig.h. | ||
13 | * | ||
14 | * jmemmac.c uses the Macintosh toolbox routines NewPtr and DisposePtr | ||
15 | * instead of malloc and free. It accurately determines the amount of | ||
16 | * memory available by using CompactMem. Notice that if left to its | ||
17 | * own devices, this code can chew up all available space in the | ||
18 | * application's zone, with the exception of the rather small "slop" | ||
19 | * factor computed in jpeg_mem_available(). The application can ensure | ||
20 | * that more space is left over by reducing max_memory_to_use. | ||
21 | * | ||
22 | * Large images are swapped to disk using temporary files and System 7.0+'s | ||
23 | * temporary folder functionality. | ||
24 | * | ||
25 | * Note that jmemmac.c depends on two features of MacOS that were first | ||
26 | * introduced in System 7: FindFolder and the FSSpec-based calls. | ||
27 | * If your application uses jmemmac.c and is run under System 6 or earlier, | ||
28 | * and the jpeg library decides it needs a temporary file, it will abort, | ||
29 | * printing error messages about requiring System 7. (If no temporary files | ||
30 | * are created, it will run fine.) | ||
31 | * | ||
32 | * If you want to use jmemmac.c in an application that might be used with | ||
33 | * System 6 or earlier, then you should remove dependencies on FindFolder | ||
34 | * and the FSSpec calls. You will need to replace FindFolder with some | ||
35 | * other mechanism for finding a place to put temporary files, and you | ||
36 | * should replace the FSSpec calls with their HFS equivalents: | ||
37 | * | ||
38 | * FSpDelete -> HDelete | ||
39 | * FSpGetFInfo -> HGetFInfo | ||
40 | * FSpCreate -> HCreate | ||
41 | * FSpOpenDF -> HOpen *** Note: not HOpenDF *** | ||
42 | * FSMakeFSSpec -> (fill in spec by hand.) | ||
43 | * | ||
44 | * (Use HOpen instead of HOpenDF. HOpen is just a glue-interface to PBHOpen, | ||
45 | * which is on all HFS macs. HOpenDF is a System 7 addition which avoids the | ||
46 | * ages-old problem of names starting with a period.) | ||
47 | * | ||
48 | * Contributed by Sam Bushell (jsam@iagu.on.net) and | ||
49 | * Dan Gildor (gyld@in-touch.com). | ||
50 | */ | ||
51 | |||
52 | #define JPEG_INTERNALS | ||
53 | #include "jinclude.h" | ||
54 | #include "jpeglib.h" | ||
55 | #include "jmemsys.h" /* import the system-dependent declarations */ | ||
56 | |||
57 | #ifndef USE_MAC_MEMMGR /* make sure user got configuration right */ | ||
58 | You forgot to define USE_MAC_MEMMGR in jconfig.h. /* deliberate syntax error */ | ||
59 | #endif | ||
60 | |||
61 | #include <Memory.h> /* we use the MacOS memory manager */ | ||
62 | #include <Files.h> /* we use the MacOS File stuff */ | ||
63 | #include <Folders.h> /* we use the MacOS HFS stuff */ | ||
64 | #include <Script.h> /* for smSystemScript */ | ||
65 | #include <Gestalt.h> /* we use Gestalt to test for specific functionality */ | ||
66 | |||
67 | #ifndef TEMP_FILE_NAME /* can override from jconfig.h or Makefile */ | ||
68 | #define TEMP_FILE_NAME "JPG%03d.TMP" | ||
69 | #endif | ||
70 | |||
71 | static int next_file_num; /* to distinguish among several temp files */ | ||
72 | |||
73 | |||
74 | /* | ||
75 | * Memory allocation and freeing are controlled by the MacOS library | ||
76 | * routines NewPtr() and DisposePtr(), which allocate fixed-address | ||
77 | * storage. Unfortunately, the IJG library isn't smart enough to cope | ||
78 | * with relocatable storage. | ||
79 | */ | ||
80 | |||
81 | GLOBAL(void *) | ||
82 | jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject) | ||
83 | { | ||
84 | return (void *) NewPtr(sizeofobject); | ||
85 | } | ||
86 | |||
87 | GLOBAL(void) | ||
88 | jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject) | ||
89 | { | ||
90 | DisposePtr((Ptr) object); | ||
91 | } | ||
92 | |||
93 | |||
94 | /* | ||
95 | * "Large" objects are treated the same as "small" ones. | ||
96 | * NB: we include FAR keywords in the routine declarations simply for | ||
97 | * consistency with the rest of the IJG code; FAR should expand to empty | ||
98 | * on rational architectures like the Mac. | ||
99 | */ | ||
100 | |||
101 | GLOBAL(void FAR *) | ||
102 | jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject) | ||
103 | { | ||
104 | return (void FAR *) NewPtr(sizeofobject); | ||
105 | } | ||
106 | |||
107 | GLOBAL(void) | ||
108 | jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject) | ||
109 | { | ||
110 | DisposePtr((Ptr) object); | ||
111 | } | ||
112 | |||
113 | |||
114 | /* | ||
115 | * This routine computes the total memory space available for allocation. | ||
116 | */ | ||
117 | |||
118 | GLOBAL(long) | ||
119 | jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed, | ||
120 | long max_bytes_needed, long already_allocated) | ||
121 | { | ||
122 | long limit = cinfo->mem->max_memory_to_use - already_allocated; | ||
123 | long slop, mem; | ||
124 | |||
125 | /* Don't ask for more than what application has told us we may use */ | ||
126 | if (max_bytes_needed > limit && limit > 0) | ||
127 | max_bytes_needed = limit; | ||
128 | /* Find whether there's a big enough free block in the heap. | ||
129 | * CompactMem tries to create a contiguous block of the requested size, | ||
130 | * and then returns the size of the largest free block (which could be | ||
131 | * much more or much less than we asked for). | ||
132 | * We add some slop to ensure we don't use up all available memory. | ||
133 | */ | ||
134 | slop = max_bytes_needed / 16 + 32768L; | ||
135 | mem = CompactMem(max_bytes_needed + slop) - slop; | ||
136 | if (mem < 0) | ||
137 | mem = 0; /* sigh, couldn't even get the slop */ | ||
138 | /* Don't take more than the application says we can have */ | ||
139 | if (mem > limit && limit > 0) | ||
140 | mem = limit; | ||
141 | return mem; | ||
142 | } | ||
143 | |||
144 | |||
145 | /* | ||
146 | * Backing store (temporary file) management. | ||
147 | * Backing store objects are only used when the value returned by | ||
148 | * jpeg_mem_available is less than the total space needed. You can dispense | ||
149 | * with these routines if you have plenty of virtual memory; see jmemnobs.c. | ||
150 | */ | ||
151 | |||
152 | |||
153 | METHODDEF(void) | ||
154 | read_backing_store (j_common_ptr cinfo, backing_store_ptr info, | ||
155 | void FAR * buffer_address, | ||
156 | long file_offset, long byte_count) | ||
157 | { | ||
158 | long bytes = byte_count; | ||
159 | long retVal; | ||
160 | |||
161 | if ( SetFPos ( info->temp_file, fsFromStart, file_offset ) != noErr ) | ||
162 | ERREXIT(cinfo, JERR_TFILE_SEEK); | ||
163 | |||
164 | retVal = FSRead ( info->temp_file, &bytes, | ||
165 | (unsigned char *) buffer_address ); | ||
166 | if ( retVal != noErr || bytes != byte_count ) | ||
167 | ERREXIT(cinfo, JERR_TFILE_READ); | ||
168 | } | ||
169 | |||
170 | |||
171 | METHODDEF(void) | ||
172 | write_backing_store (j_common_ptr cinfo, backing_store_ptr info, | ||
173 | void FAR * buffer_address, | ||
174 | long file_offset, long byte_count) | ||
175 | { | ||
176 | long bytes = byte_count; | ||
177 | long retVal; | ||
178 | |||
179 | if ( SetFPos ( info->temp_file, fsFromStart, file_offset ) != noErr ) | ||
180 | ERREXIT(cinfo, JERR_TFILE_SEEK); | ||
181 | |||
182 | retVal = FSWrite ( info->temp_file, &bytes, | ||
183 | (unsigned char *) buffer_address ); | ||
184 | if ( retVal != noErr || bytes != byte_count ) | ||
185 | ERREXIT(cinfo, JERR_TFILE_WRITE); | ||
186 | } | ||
187 | |||
188 | |||
189 | METHODDEF(void) | ||
190 | close_backing_store (j_common_ptr cinfo, backing_store_ptr info) | ||
191 | { | ||
192 | FSClose ( info->temp_file ); | ||
193 | FSpDelete ( &(info->tempSpec) ); | ||
194 | } | ||
195 | |||
196 | |||
197 | /* | ||
198 | * Initial opening of a backing-store object. | ||
199 | * | ||
200 | * This version uses FindFolder to find the Temporary Items folder, | ||
201 | * and puts the temporary file in there. | ||
202 | */ | ||
203 | |||
204 | GLOBAL(void) | ||
205 | jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info, | ||
206 | long total_bytes_needed) | ||
207 | { | ||
208 | short tmpRef, vRefNum; | ||
209 | long dirID; | ||
210 | FInfo finderInfo; | ||
211 | FSSpec theSpec; | ||
212 | Str255 fName; | ||
213 | OSErr osErr; | ||
214 | long gestaltResponse = 0; | ||
215 | |||
216 | /* Check that FSSpec calls are available. */ | ||
217 | osErr = Gestalt( gestaltFSAttr, &gestaltResponse ); | ||
218 | if ( ( osErr != noErr ) | ||
219 | || !( gestaltResponse & (1<<gestaltHasFSSpecCalls) ) ) | ||
220 | ERREXITS(cinfo, JERR_TFILE_CREATE, "- System 7.0 or later required"); | ||
221 | /* TO DO: add a proper error message to jerror.h. */ | ||
222 | |||
223 | /* Check that FindFolder is available. */ | ||
224 | osErr = Gestalt( gestaltFindFolderAttr, &gestaltResponse ); | ||
225 | if ( ( osErr != noErr ) | ||
226 | || !( gestaltResponse & (1<<gestaltFindFolderPresent) ) ) | ||
227 | ERREXITS(cinfo, JERR_TFILE_CREATE, "- System 7.0 or later required."); | ||
228 | /* TO DO: add a proper error message to jerror.h. */ | ||
229 | |||
230 | osErr = FindFolder ( kOnSystemDisk, kTemporaryFolderType, kCreateFolder, | ||
231 | &vRefNum, &dirID ); | ||
232 | if ( osErr != noErr ) | ||
233 | ERREXITS(cinfo, JERR_TFILE_CREATE, "- temporary items folder unavailable"); | ||
234 | /* TO DO: Try putting the temp files somewhere else. */ | ||
235 | |||
236 | /* Keep generating file names till we find one that's not in use */ | ||
237 | for (;;) { | ||
238 | next_file_num++; /* advance counter */ | ||
239 | |||
240 | sprintf(info->temp_name, TEMP_FILE_NAME, next_file_num); | ||
241 | strcpy ( (Ptr)fName+1, info->temp_name ); | ||
242 | *fName = strlen (info->temp_name); | ||
243 | osErr = FSMakeFSSpec ( vRefNum, dirID, fName, &theSpec ); | ||
244 | |||
245 | if ( (osErr = FSpGetFInfo ( &theSpec, &finderInfo ) ) != noErr ) | ||
246 | break; | ||
247 | } | ||
248 | |||
249 | osErr = FSpCreate ( &theSpec, '????', '????', smSystemScript ); | ||
250 | if ( osErr != noErr ) | ||
251 | ERREXITS(cinfo, JERR_TFILE_CREATE, info->temp_name); | ||
252 | |||
253 | osErr = FSpOpenDF ( &theSpec, fsRdWrPerm, &(info->temp_file) ); | ||
254 | if ( osErr != noErr ) | ||
255 | ERREXITS(cinfo, JERR_TFILE_CREATE, info->temp_name); | ||
256 | |||
257 | info->tempSpec = theSpec; | ||
258 | |||
259 | info->read_backing_store = read_backing_store; | ||
260 | info->write_backing_store = write_backing_store; | ||
261 | info->close_backing_store = close_backing_store; | ||
262 | TRACEMSS(cinfo, 1, JTRC_TFILE_OPEN, info->temp_name); | ||
263 | } | ||
264 | |||
265 | |||
266 | /* | ||
267 | * These routines take care of any system-dependent initialization and | ||
268 | * cleanup required. | ||
269 | */ | ||
270 | |||
271 | GLOBAL(long) | ||
272 | jpeg_mem_init (j_common_ptr cinfo) | ||
273 | { | ||
274 | next_file_num = 0; | ||
275 | |||
276 | /* max_memory_to_use will be initialized to FreeMem()'s result; | ||
277 | * the calling application might later reduce it, for example | ||
278 | * to leave room to invoke multiple JPEG objects. | ||
279 | * Note that FreeMem returns the total number of free bytes; | ||
280 | * it may not be possible to allocate a single block of this size. | ||
281 | */ | ||
282 | return FreeMem(); | ||
283 | } | ||
284 | |||
285 | GLOBAL(void) | ||
286 | jpeg_mem_term (j_common_ptr cinfo) | ||
287 | { | ||
288 | /* no work */ | ||
289 | } | ||