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1<?xml version="1.0"?>
2<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
3 "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd">
4<refentry id="libg3d-iff">
5<refmeta>
6<refentrytitle role="top_of_page" id="libg3d-iff.top_of_page">iff</refentrytitle>
7<manvolnum>3</manvolnum>
8<refmiscinfo>LIBG3D Library</refmiscinfo>
9</refmeta>
10
11<refnamediv>
12<refname>iff</refname>
13<refpurpose>IFF file helper functions</refpurpose>
14<!--[<xref linkend="desc" endterm="desc.title"/>]-->
15</refnamediv>
16
17<refsynopsisdiv id="libg3d-iff.synopsis" role="synopsis">
18<title role="synopsis.title">Synopsis</title>
19
20<synopsis>
21
22#include &lt;g3d/iff.h&gt;
23
24#define <link linkend="G3D-IFF-PAD1:CAPS">G3D_IFF_PAD1</link>
25#define <link linkend="G3D-IFF-PAD2:CAPS">G3D_IFF_PAD2</link>
26#define <link linkend="G3D-IFF-PAD4:CAPS">G3D_IFF_PAD4</link>
27#define <link linkend="G3D-IFF-PAD8:CAPS">G3D_IFF_PAD8</link>
28#define <link linkend="G3D-IFF-LE:CAPS">G3D_IFF_LE</link>
29#define <link linkend="G3D-IFF-LEN16:CAPS">G3D_IFF_LEN16</link>
30#define <link linkend="G3D-IFF-SUBCHUNK-LEN16:CAPS">G3D_IFF_SUBCHUNK_LEN16</link>
31#define <link linkend="G3D-IFF-MKID:CAPS">G3D_IFF_MKID</link> (a,b,c,d)
32<link linkend="gboolean">gboolean</link> <link linkend="g3d-iff-check">g3d_iff_check</link> (<link linkend="G3DStream">G3DStream</link> *stream,
33 <link linkend="guint32">guint32</link> *id,
34 <link linkend="gsize">gsize</link> *len);
35<link linkend="gsize">gsize</link> <link linkend="g3d-iff-read-chunk">g3d_iff_read_chunk</link> (<link linkend="G3DStream">G3DStream</link> *stream,
36 <link linkend="guint32">guint32</link> *id,
37 <link linkend="gsize">gsize</link> *len,
38 <link linkend="guint32">guint32</link> flags);
39<link linkend="gpointer">gpointer</link> <link linkend="g3d-iff-handle-chunk">g3d_iff_handle_chunk</link> (<link linkend="G3DIffGlobal">G3DIffGlobal</link> *global,
40 <link linkend="G3DIffLocal">G3DIffLocal</link> *plocal,
41 <link linkend="G3DIffChunkInfo">G3DIffChunkInfo</link> *chunks,
42 <link linkend="guint32">guint32</link> flags);
43<link linkend="gboolean">gboolean</link> <link linkend="g3d-iff-chunk-matches">g3d_iff_chunk_matches</link> (<link linkend="guint32">guint32</link> id,
44 <link linkend="gchar">gchar</link> *tid);
45<link linkend="gboolean">gboolean</link> <link linkend="g3d-iff-read-ctnr">g3d_iff_read_ctnr</link> (<link linkend="G3DIffGlobal">G3DIffGlobal</link> *global,
46 <link linkend="G3DIffLocal">G3DIffLocal</link> *local,
47 <link linkend="G3DIffChunkInfo">G3DIffChunkInfo</link> *chunks,
48 <link linkend="guint32">guint32</link> flags);
49<link linkend="gchar">gchar</link>* <link linkend="g3d-iff-id-to-text">g3d_iff_id_to_text</link> (<link linkend="guint32">guint32</link> id);
50<link linkend="FILE:CAPS">FILE</link>* <link linkend="g3d-iff-open">g3d_iff_open</link> (const <link linkend="gchar">gchar</link> *filename,
51 <link linkend="guint32">guint32</link> *id,
52 <link linkend="guint32">guint32</link> *len);
53<link linkend="int">int</link> <link linkend="g3d-iff-readchunk">g3d_iff_readchunk</link> (<link linkend="FILE:CAPS">FILE</link> *f,
54 <link linkend="guint32">guint32</link> *id,
55 <link linkend="guint32">guint32</link> *len,
56 <link linkend="guint32">guint32</link> flags);
57<link linkend="gboolean">gboolean</link> (<link linkend="G3DIffChunkCallback">*G3DIffChunkCallback</link>) (<link linkend="G3DIffGlobal">G3DIffGlobal</link> *global,
58 <link linkend="G3DIffLocal">G3DIffLocal</link> *local);
59#define <link linkend="g3d-iff-chunk-callback">g3d_iff_chunk_callback</link>
60 <link linkend="G3DIffChunkInfo">G3DIffChunkInfo</link>;
61#define <link linkend="g3d-iff-chunk-info">g3d_iff_chunk_info</link>
62 <link linkend="G3DIffGlobal">G3DIffGlobal</link>;
63#define <link linkend="g3d-iff-gdata">g3d_iff_gdata</link>
64 <link linkend="G3DIffLocal">G3DIffLocal</link>;
65#define <link linkend="g3d-iff-ldata">g3d_iff_ldata</link>
66</synopsis>
67</refsynopsisdiv>
68
69
70
71
72
73
74
75
76
77<refsect1 id="libg3d-iff.description" role="desc">
78<title role="desc.title">Description</title>
79<para>
80These are helper functions to read data from the Interchange File Format
81(IFF).</para>
82<para>
83
84</para>
85</refsect1>
86
87<refsect1 id="libg3d-iff.details" role="details">
88<title role="details.title">Details</title>
89<refsect2 id="G3D-IFF-PAD1:CAPS" role="macro">
90<title>G3D_IFF_PAD1</title>
91<indexterm zone="G3D-IFF-PAD1:CAPS"><primary>G3D_IFF_PAD1</primary></indexterm><programlisting>#define G3D_IFF_PAD1 0x01
92</programlisting>
93<para>
94No padding is done after chunks.</para>
95<para>
96
97</para></refsect2>
98<refsect2 id="G3D-IFF-PAD2:CAPS" role="macro">
99<title>G3D_IFF_PAD2</title>
100<indexterm zone="G3D-IFF-PAD2:CAPS"><primary>G3D_IFF_PAD2</primary></indexterm><programlisting>#define G3D_IFF_PAD2 0x02
101</programlisting>
102<para>
103Chunks are 2-byte aligned</para>
104<para>
105
106</para></refsect2>
107<refsect2 id="G3D-IFF-PAD4:CAPS" role="macro">
108<title>G3D_IFF_PAD4</title>
109<indexterm zone="G3D-IFF-PAD4:CAPS"><primary>G3D_IFF_PAD4</primary></indexterm><programlisting>#define G3D_IFF_PAD4 0x04
110</programlisting>
111<para>
112Chunks are 4-byte aligned</para>
113<para>
114
115</para></refsect2>
116<refsect2 id="G3D-IFF-PAD8:CAPS" role="macro">
117<title>G3D_IFF_PAD8</title>
118<indexterm zone="G3D-IFF-PAD8:CAPS"><primary>G3D_IFF_PAD8</primary></indexterm><programlisting>#define G3D_IFF_PAD8 0x08
119</programlisting>
120<para>
121Chunks are 8-byte aligned</para>
122<para>
123
124</para></refsect2>
125<refsect2 id="G3D-IFF-LE:CAPS" role="macro">
126<title>G3D_IFF_LE</title>
127<indexterm zone="G3D-IFF-LE:CAPS"><primary>G3D_IFF_LE</primary></indexterm><programlisting>#define G3D_IFF_LE 0x40 /* little endian */
128</programlisting>
129<para>
130The file has little-endian data.</para>
131<para>
132
133</para></refsect2>
134<refsect2 id="G3D-IFF-LEN16:CAPS" role="macro">
135<title>G3D_IFF_LEN16</title>
136<indexterm zone="G3D-IFF-LEN16:CAPS"><primary>G3D_IFF_LEN16</primary></indexterm><programlisting>#define G3D_IFF_LEN16 0x20
137</programlisting>
138<para>
139All chunks have 16-bit sizes.</para>
140<para>
141
142</para></refsect2>
143<refsect2 id="G3D-IFF-SUBCHUNK-LEN16:CAPS" role="macro">
144<title>G3D_IFF_SUBCHUNK_LEN16</title>
145<indexterm zone="G3D-IFF-SUBCHUNK-LEN16:CAPS"><primary>G3D_IFF_SUBCHUNK_LEN16</primary></indexterm><programlisting>#define G3D_IFF_SUBCHUNK_LEN16 0x10
146</programlisting>
147<para>
148All chunks except the toplevel ones have 16-bit sizes.</para>
149<para>
150
151</para></refsect2>
152<refsect2 id="G3D-IFF-MKID:CAPS" role="macro">
153<title>G3D_IFF_MKID()</title>
154<indexterm zone="G3D-IFF-MKID:CAPS"><primary>G3D_IFF_MKID</primary></indexterm><programlisting>#define G3D_IFF_MKID(a,b,c,d)</programlisting>
155<para>
156Generate an IFF chunk identifier from character representation, e.g.
157G3D_IFF_MKID('F','O','R','M').</para>
158<para>
159
160</para><variablelist role="params">
161<varlistentry><term><parameter>a</parameter>&nbsp;:</term>
162<listitem><simpara> first byte
163</simpara></listitem></varlistentry>
164<varlistentry><term><parameter>b</parameter>&nbsp;:</term>
165<listitem><simpara> second byte
166</simpara></listitem></varlistentry>
167<varlistentry><term><parameter>c</parameter>&nbsp;:</term>
168<listitem><simpara> third byte
169</simpara></listitem></varlistentry>
170<varlistentry><term><parameter>d</parameter>&nbsp;:</term>
171<listitem><simpara> fourth byte
172</simpara></listitem></varlistentry>
173</variablelist></refsect2>
174<refsect2 id="g3d-iff-check" role="function">
175<title>g3d_iff_check ()</title>
176<indexterm zone="g3d-iff-check"><primary>g3d_iff_check</primary></indexterm><programlisting><link linkend="gboolean">gboolean</link> g3d_iff_check (<link linkend="G3DStream">G3DStream</link> *stream,
177 <link linkend="guint32">guint32</link> *id,
178 <link linkend="gsize">gsize</link> *len);</programlisting>
179<para>
180Checks a stream for a valid IFF signature and reads the top level container.</para>
181<para>
182
183</para><variablelist role="params">
184<varlistentry><term><parameter>stream</parameter>&nbsp;:</term>
185<listitem><simpara> stream containing IFF file to check
186</simpara></listitem></varlistentry>
187<varlistentry><term><parameter>id</parameter>&nbsp;:</term>
188<listitem><simpara> top level ID (out)
189</simpara></listitem></varlistentry>
190<varlistentry><term><parameter>len</parameter>&nbsp;:</term>
191<listitem><simpara> length of top level container (out)
192</simpara></listitem></varlistentry>
193<varlistentry><term><emphasis>Returns</emphasis>&nbsp;:</term><listitem><simpara> TRUE on success (valid IFF), FALSE else
194</simpara></listitem></varlistentry>
195</variablelist></refsect2>
196<refsect2 id="g3d-iff-read-chunk" role="function">
197<title>g3d_iff_read_chunk ()</title>
198<indexterm zone="g3d-iff-read-chunk"><primary>g3d_iff_read_chunk</primary></indexterm><programlisting><link linkend="gsize">gsize</link> g3d_iff_read_chunk (<link linkend="G3DStream">G3DStream</link> *stream,
199 <link linkend="guint32">guint32</link> *id,
200 <link linkend="gsize">gsize</link> *len,
201 <link linkend="guint32">guint32</link> flags);</programlisting>
202<para>
203Reads one chunk header from an IFF file.</para>
204<para>
205
206</para><variablelist role="params">
207<varlistentry><term><parameter>stream</parameter>&nbsp;:</term>
208<listitem><simpara> stream to read from
209</simpara></listitem></varlistentry>
210<varlistentry><term><parameter>id</parameter>&nbsp;:</term>
211<listitem><simpara> ID of chunk (out)
212</simpara></listitem></varlistentry>
213<varlistentry><term><parameter>len</parameter>&nbsp;:</term>
214<listitem><simpara> length of chunk (excluding header) (out)
215</simpara></listitem></varlistentry>
216<varlistentry><term><parameter>flags</parameter>&nbsp;:</term>
217<listitem><simpara> flags
218</simpara></listitem></varlistentry>
219<varlistentry><term><emphasis>Returns</emphasis>&nbsp;:</term><listitem><simpara> real length of chunk including header and possible padding byte
220</simpara></listitem></varlistentry>
221</variablelist></refsect2>
222<refsect2 id="g3d-iff-handle-chunk" role="function">
223<title>g3d_iff_handle_chunk ()</title>
224<indexterm zone="g3d-iff-handle-chunk"><primary>g3d_iff_handle_chunk</primary></indexterm><programlisting><link linkend="gpointer">gpointer</link> g3d_iff_handle_chunk (<link linkend="G3DIffGlobal">G3DIffGlobal</link> *global,
225 <link linkend="G3DIffLocal">G3DIffLocal</link> *plocal,
226 <link linkend="G3DIffChunkInfo">G3DIffChunkInfo</link> *chunks,
227 <link linkend="guint32">guint32</link> flags);</programlisting>
228<para>
229Handle an IFF chunk based on chunk description.</para>
230<para>
231
232</para><variablelist role="params">
233<varlistentry><term><parameter>global</parameter>&nbsp;:</term>
234<listitem><simpara> global data
235</simpara></listitem></varlistentry>
236<varlistentry><term><parameter>plocal</parameter>&nbsp;:</term>
237<listitem><simpara> local data of parent chunk, must not be NULL
238</simpara></listitem></varlistentry>
239<varlistentry><term><parameter>chunks</parameter>&nbsp;:</term>
240<listitem><simpara> chunk description list
241</simpara></listitem></varlistentry>
242<varlistentry><term><parameter>flags</parameter>&nbsp;:</term>
243<listitem><simpara> IFF flags
244</simpara></listitem></varlistentry>
245<varlistentry><term><emphasis>Returns</emphasis>&nbsp;:</term><listitem><simpara> level object for siblings, may be NULL.
246</simpara></listitem></varlistentry>
247</variablelist></refsect2>
248<refsect2 id="g3d-iff-chunk-matches" role="function">
249<title>g3d_iff_chunk_matches ()</title>
250<indexterm zone="g3d-iff-chunk-matches"><primary>g3d_iff_chunk_matches</primary></indexterm><programlisting><link linkend="gboolean">gboolean</link> g3d_iff_chunk_matches (<link linkend="guint32">guint32</link> id,
251 <link linkend="gchar">gchar</link> *tid);</programlisting>
252<para>
253Check whether <parameter>id</parameter> and <parameter>tid</parameter> match.</para>
254<para>
255
256</para><variablelist role="params">
257<varlistentry><term><parameter>id</parameter>&nbsp;:</term>
258<listitem><simpara> IFF identifier
259</simpara></listitem></varlistentry>
260<varlistentry><term><parameter>tid</parameter>&nbsp;:</term>
261<listitem><simpara> textual representation of identifier
262</simpara></listitem></varlistentry>
263<varlistentry><term><emphasis>Returns</emphasis>&nbsp;:</term><listitem><simpara> TRUE on match, FALSE else.
264</simpara></listitem></varlistentry>
265</variablelist></refsect2>
266<refsect2 id="g3d-iff-read-ctnr" role="function">
267<title>g3d_iff_read_ctnr ()</title>
268<indexterm zone="g3d-iff-read-ctnr"><primary>g3d_iff_read_ctnr</primary></indexterm><programlisting><link linkend="gboolean">gboolean</link> g3d_iff_read_ctnr (<link linkend="G3DIffGlobal">G3DIffGlobal</link> *global,
269 <link linkend="G3DIffLocal">G3DIffLocal</link> *local,
270 <link linkend="G3DIffChunkInfo">G3DIffChunkInfo</link> *chunks,
271 <link linkend="guint32">guint32</link> flags);</programlisting>
272<para>
273Read subchunks in current chunk and handle them appropriately.</para>
274<para>
275
276</para><variablelist role="params">
277<varlistentry><term><parameter>global</parameter>&nbsp;:</term>
278<listitem><simpara> global data
279</simpara></listitem></varlistentry>
280<varlistentry><term><parameter>local</parameter>&nbsp;:</term>
281<listitem><simpara> local data of current chunk, must not be NULL
282</simpara></listitem></varlistentry>
283<varlistentry><term><parameter>chunks</parameter>&nbsp;:</term>
284<listitem><simpara> chunk description list
285</simpara></listitem></varlistentry>
286<varlistentry><term><parameter>flags</parameter>&nbsp;:</term>
287<listitem><simpara> IFF flags
288</simpara></listitem></varlistentry>
289<varlistentry><term><emphasis>Returns</emphasis>&nbsp;:</term><listitem><simpara> TRUE on success, FALSE else.
290</simpara></listitem></varlistentry>
291</variablelist></refsect2>
292<refsect2 id="g3d-iff-id-to-text" role="function">
293<title>g3d_iff_id_to_text ()</title>
294<indexterm zone="g3d-iff-id-to-text"><primary>g3d_iff_id_to_text</primary></indexterm><programlisting><link linkend="gchar">gchar</link>* g3d_iff_id_to_text (<link linkend="guint32">guint32</link> id);</programlisting>
295<para>
296Get the text representation of an IFF chunk identifier.</para>
297<para>
298
299</para><variablelist role="params">
300<varlistentry><term><parameter>id</parameter>&nbsp;:</term>
301<listitem><simpara> an IFF identifier
302</simpara></listitem></varlistentry>
303<varlistentry><term><emphasis>Returns</emphasis>&nbsp;:</term><listitem><simpara> a newly allocated string containing the text identifier.
304</simpara></listitem></varlistentry>
305</variablelist></refsect2>
306<refsect2 id="g3d-iff-open" role="function">
307<title>g3d_iff_open ()</title>
308<indexterm zone="g3d-iff-open"><primary>g3d_iff_open</primary></indexterm><programlisting><link linkend="FILE:CAPS">FILE</link>* g3d_iff_open (const <link linkend="gchar">gchar</link> *filename,
309 <link linkend="guint32">guint32</link> *id,
310 <link linkend="guint32">guint32</link> *len);</programlisting>
311<para>
312Opens an IFF file, checks it and reads its top level container.</para>
313<para>
314
315</para><variablelist role="params">
316<varlistentry><term><parameter>filename</parameter>&nbsp;:</term>
317<listitem><simpara> file name of IFF file
318</simpara></listitem></varlistentry>
319<varlistentry><term><parameter>id</parameter>&nbsp;:</term>
320<listitem><simpara> top level ID (out)
321</simpara></listitem></varlistentry>
322<varlistentry><term><parameter>len</parameter>&nbsp;:</term>
323<listitem><simpara> length of top level container (out)
324</simpara></listitem></varlistentry>
325<varlistentry><term><emphasis>Returns</emphasis>&nbsp;:</term><listitem><simpara> the file pointer of open file or NULL in case of an error
326</simpara></listitem></varlistentry>
327</variablelist></refsect2>
328<refsect2 id="g3d-iff-readchunk" role="function">
329<title>g3d_iff_readchunk ()</title>
330<indexterm zone="g3d-iff-readchunk"><primary>g3d_iff_readchunk</primary></indexterm><programlisting><link linkend="int">int</link> g3d_iff_readchunk (<link linkend="FILE:CAPS">FILE</link> *f,
331 <link linkend="guint32">guint32</link> *id,
332 <link linkend="guint32">guint32</link> *len,
333 <link linkend="guint32">guint32</link> flags);</programlisting>
334<para>
335Reads one chunk header from an IFF file.</para>
336<para>
337
338</para><variablelist role="params">
339<varlistentry><term><parameter>f</parameter>&nbsp;:</term>
340<listitem><simpara> the open IFF file pointer
341</simpara></listitem></varlistentry>
342<varlistentry><term><parameter>id</parameter>&nbsp;:</term>
343<listitem><simpara> ID of chunk (out)
344</simpara></listitem></varlistentry>
345<varlistentry><term><parameter>len</parameter>&nbsp;:</term>
346<listitem><simpara> length of chunk (excluding header) (out)
347</simpara></listitem></varlistentry>
348<varlistentry><term><parameter>flags</parameter>&nbsp;:</term>
349<listitem><simpara> flags
350</simpara></listitem></varlistentry>
351<varlistentry><term><emphasis>Returns</emphasis>&nbsp;:</term><listitem><simpara> real length of chunk including header and possible padding byte
352</simpara></listitem></varlistentry>
353</variablelist></refsect2>
354<refsect2 id="G3DIffChunkCallback" role="function">
355<title>G3DIffChunkCallback ()</title>
356<indexterm zone="G3DIffChunkCallback"><primary>G3DIffChunkCallback</primary></indexterm><programlisting><link linkend="gboolean">gboolean</link> (*G3DIffChunkCallback) (<link linkend="G3DIffGlobal">G3DIffGlobal</link> *global,
357 <link linkend="G3DIffLocal">G3DIffLocal</link> *local);</programlisting>
358<para>
359IFF callback function prototype.</para>
360<para>
361
362</para><variablelist role="params">
363<varlistentry><term><parameter>global</parameter>&nbsp;:</term>
364<listitem><simpara> the global data
365</simpara></listitem></varlistentry>
366<varlistentry><term><parameter>local</parameter>&nbsp;:</term>
367<listitem><simpara> the local data
368</simpara></listitem></varlistentry>
369<varlistentry><term><emphasis>Returns</emphasis>&nbsp;:</term><listitem><simpara> TRUE on success, FALSE else.
370</simpara></listitem></varlistentry>
371</variablelist></refsect2>
372<refsect2 id="g3d-iff-chunk-callback" role="macro">
373<title>g3d_iff_chunk_callback</title>
374<indexterm zone="g3d-iff-chunk-callback"><primary>g3d_iff_chunk_callback</primary></indexterm><programlisting>#define g3d_iff_chunk_callback G3DIffChunkCallback
375</programlisting>
376<para>
377IFF chunk callback (deprecated).</para>
378<para>
379
380</para></refsect2>
381<refsect2 id="G3DIffChunkInfo" role="struct">
382<title>G3DIffChunkInfo</title>
383<indexterm zone="G3DIffChunkInfo"><primary>G3DIffChunkInfo</primary></indexterm><programlisting>typedef struct {
384 gchar *id;
385 gchar *description;
386 gboolean container;
387 G3DIffChunkCallback callback;
388} G3DIffChunkInfo;
389</programlisting>
390<para>
391A chunk type description.</para>
392<para>
393
394</para><variablelist role="struct">
395<varlistentry>
396<term><link linkend="gchar">gchar</link>&nbsp;*<structfield>id</structfield>;</term>
397<listitem><simpara> identifier of chunk
398</simpara></listitem>
399</varlistentry>
400<varlistentry>
401<term><link linkend="gchar">gchar</link>&nbsp;*<structfield>description</structfield>;</term>
402<listitem><simpara> human-readable description of chunk type
403</simpara></listitem>
404</varlistentry>
405<varlistentry>
406<term><link linkend="gboolean">gboolean</link>&nbsp;<structfield>container</structfield>;</term>
407<listitem><simpara> TRUE if this chunk contains sub-chunks
408</simpara></listitem>
409</varlistentry>
410<varlistentry>
411<term><link linkend="G3DIffChunkCallback">G3DIffChunkCallback</link>&nbsp;<structfield>callback</structfield>;</term>
412<listitem><simpara> function to be called if such a chunk is found
413</simpara></listitem>
414</varlistentry>
415</variablelist></refsect2>
416<refsect2 id="g3d-iff-chunk-info" role="macro">
417<title>g3d_iff_chunk_info</title>
418<indexterm zone="g3d-iff-chunk-info"><primary>g3d_iff_chunk_info</primary></indexterm><programlisting>#define g3d_iff_chunk_info G3DIffChunkInfo
419</programlisting>
420<para>
421IFF chunk description (deprecated).</para>
422<para>
423
424</para></refsect2>
425<refsect2 id="G3DIffGlobal" role="struct">
426<title>G3DIffGlobal</title>
427<indexterm zone="G3DIffGlobal"><primary>G3DIffGlobal</primary></indexterm><programlisting>typedef struct {
428 G3DContext *context;
429 G3DModel *model;
430 G3DStream *stream;
431 guint32 flags;
432 gpointer user_data;
433 FILE *f;
434 long int max_fpos;
435} G3DIffGlobal;
436</programlisting>
437<para>
438The plugin-global data to be given to IFF callback functions.</para>
439<para>
440
441</para><variablelist role="struct">
442<varlistentry>
443<term><link linkend="G3DContext">G3DContext</link>&nbsp;*<structfield>context</structfield>;</term>
444<listitem><simpara> a valid context
445</simpara></listitem>
446</varlistentry>
447<varlistentry>
448<term><link linkend="G3DModel">G3DModel</link>&nbsp;*<structfield>model</structfield>;</term>
449<listitem><simpara> a model
450</simpara></listitem>
451</varlistentry>
452<varlistentry>
453<term><link linkend="G3DStream">G3DStream</link>&nbsp;*<structfield>stream</structfield>;</term>
454<listitem><simpara> the stream to read model from
455</simpara></listitem>
456</varlistentry>
457<varlistentry>
458<term><link linkend="guint32">guint32</link>&nbsp;<structfield>flags</structfield>;</term>
459<listitem><simpara> IFF flags
460</simpara></listitem>
461</varlistentry>
462<varlistentry>
463<term><link linkend="gpointer">gpointer</link>&nbsp;<structfield>user_data</structfield>;</term>
464<listitem><simpara> to be used by plugin
465</simpara></listitem>
466</varlistentry>
467<varlistentry>
468<term><link linkend="FILE:CAPS">FILE</link>&nbsp;*<structfield>f</structfield>;</term>
469<listitem><simpara> file to read model from (DEPRECATED)
470</simpara></listitem>
471</varlistentry>
472<varlistentry>
473<term>long&nbsp;<link linkend="int">int</link>&nbsp;<structfield>max_fpos</structfield>;</term>
474<listitem><simpara> maximum file position (DEPRECATED)
475</simpara></listitem>
476</varlistentry>
477</variablelist></refsect2>
478<refsect2 id="g3d-iff-gdata" role="macro">
479<title>g3d_iff_gdata</title>
480<indexterm zone="g3d-iff-gdata"><primary>g3d_iff_gdata</primary></indexterm><programlisting>#define g3d_iff_gdata G3DIffGlobal
481</programlisting>
482<para>
483IFF global data (deprecated).</para>
484<para>
485
486</para></refsect2>
487<refsect2 id="G3DIffLocal" role="struct">
488<title>G3DIffLocal</title>
489<indexterm zone="G3DIffLocal"><primary>G3DIffLocal</primary></indexterm><programlisting>typedef struct {
490 guint32 id;
491 guint32 parent_id;
492 gpointer object;
493 gint32 level;
494 gpointer level_object;
495 gint32 nb;
496 gboolean finalize;
497} G3DIffLocal;
498</programlisting>
499<para>
500The function-local data for IFF callback functions.</para>
501<para>
502
503</para><variablelist role="struct">
504<varlistentry>
505<term><link linkend="guint32">guint32</link>&nbsp;<structfield>id</structfield>;</term>
506<listitem><simpara> chunk identifier
507</simpara></listitem>
508</varlistentry>
509<varlistentry>
510<term><link linkend="guint32">guint32</link>&nbsp;<structfield>parent_id</structfield>;</term>
511<listitem><simpara> parent chunk identifier
512</simpara></listitem>
513</varlistentry>
514<varlistentry>
515<term><link linkend="gpointer">gpointer</link>&nbsp;<structfield>object</structfield>;</term>
516<listitem><simpara> an object set by parent callbacks, may be NULL
517</simpara></listitem>
518</varlistentry>
519<varlistentry>
520<term><link linkend="gint32">gint32</link>&nbsp;<structfield>level</structfield>;</term>
521<listitem><simpara> level of chunk
522</simpara></listitem>
523</varlistentry>
524<varlistentry>
525<term><link linkend="gpointer">gpointer</link>&nbsp;<structfield>level_object</structfield>;</term>
526<listitem><simpara> object shared by callbacks on the same level, may be NULL
527</simpara></listitem>
528</varlistentry>
529<varlistentry>
530<term><link linkend="gint32">gint32</link>&nbsp;<structfield>nb</structfield>;</term>
531<listitem><simpara> number of bytes remaining in chunk, has to be decremented after
532correctly after reading from stream
533</simpara></listitem>
534</varlistentry>
535<varlistentry>
536<term><link linkend="gboolean">gboolean</link>&nbsp;<structfield>finalize</structfield>;</term>
537<listitem><simpara> for container chunks the callback function is called before
538and after processing possible sub-chunks, the second time <parameter>finalize</parameter> is set
539to TRUE
540</simpara></listitem>
541</varlistentry>
542</variablelist></refsect2>
543<refsect2 id="g3d-iff-ldata" role="macro">
544<title>g3d_iff_ldata</title>
545<indexterm zone="g3d-iff-ldata"><primary>g3d_iff_ldata</primary></indexterm><programlisting>#define g3d_iff_ldata G3DIffLocal
546</programlisting>
547<para>
548IFF local data (deprecated).</para>
549<para>
550
551</para></refsect2>
552
553</refsect1>
554
555
556
557
558</refentry>
generated by cgit v1.1 at 2025-01-13 18:39:08 +0000