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35 <table align=center><tr><td><font size=-1>[<a href="ft2-index.html">Index</a>]</font></td>
36 <td width="100%"></td>
37 <td><font size=-1>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>
38 <center><h1>FreeType-2.4.3 API Reference</h1></center>
44 <table align=center cellspacing=5 cellpadding=0 border=0>
45 <tr><td></td><td><a href="#FT_Memory">FT_Memory</a></td><td></td><td><a href="#FT_MemoryRec">FT_MemoryRec</a></td><td></td><td><a href="#FT_Stream_CloseFunc">FT_Stream_CloseFunc</a></td></tr>
46 <tr><td></td><td><a href="#FT_Alloc_Func">FT_Alloc_Func</a></td><td></td><td><a href="#FT_Stream">FT_Stream</a></td><td></td><td><a href="#FT_StreamRec">FT_StreamRec</a></td></tr>
47 <tr><td></td><td><a href="#FT_Free_Func">FT_Free_Func</a></td><td></td><td><a href="#FT_StreamDesc">FT_StreamDesc</a></td><td></td><td></td></tr>
48 <tr><td></td><td><a href="#FT_Realloc_Func">FT_Realloc_Func</a></td><td></td><td><a href="#FT_Stream_IoFunc">FT_Stream_IoFunc</a></td><td></td><td></td></tr>
51 <table align=center width="87%"><tr><td>
52 <p>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.</p>
53 </td></tr></table><br>
54 <table align=center width="75%"><tr><td>
55 <h4><a name="FT_Memory">FT_Memory</a></h4>
56 <table align=center width="87%"><tr><td>
57 Defined in FT_SYSTEM_H (freetype/ftsystem.h).
58 </td></tr></table><br>
59 <table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
61 <span class="keyword">typedef</span> <span class="keyword">struct</span> FT_MemoryRec_* <b>FT_Memory</b>;
64 <table align=center width="87%"><tr><td>
65 <p>A handle to a given memory manager object, defined with an <a href="ft2-system_interface.html#FT_MemoryRec">FT_MemoryRec</a> structure.</p>
66 </td></tr></table><br>
69 <table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td>
70 <td width="100%"></td>
71 <td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>
73 <table align=center width="75%"><tr><td>
74 <h4><a name="FT_Alloc_Func">FT_Alloc_Func</a></h4>
75 <table align=center width="87%"><tr><td>
76 Defined in FT_SYSTEM_H (freetype/ftsystem.h).
77 </td></tr></table><br>
78 <table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
80 <span class="keyword">typedef</span> <span class="keyword">void</span>*
81 (*<b>FT_Alloc_Func</b>)( <a href="ft2-system_interface.html#FT_Memory">FT_Memory</a> memory,
82 <span class="keyword">long</span> size );
85 <table align=center width="87%"><tr><td>
86 <p>A function used to allocate ‘size’ bytes from ‘memory’.</p>
87 </td></tr></table><br>
88 <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>input</b></em></td></tr><tr><td>
90 <table cellpadding=3 border=0>
91 <tr valign=top><td><b>memory</b></td><td>
92 <p>A handle to the source memory manager.</p>
94 <tr valign=top><td><b>size</b></td><td>
95 <p>The size in bytes to allocate.</p>
99 <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>return</b></em></td></tr><tr><td>
100 <p>Address of new memory block. 0 in case of failure.</p>
104 <table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td>
105 <td width="100%"></td>
106 <td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>
108 <table align=center width="75%"><tr><td>
109 <h4><a name="FT_Free_Func">FT_Free_Func</a></h4>
110 <table align=center width="87%"><tr><td>
111 Defined in FT_SYSTEM_H (freetype/ftsystem.h).
112 </td></tr></table><br>
113 <table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
115 <span class="keyword">typedef</span> <span class="keyword">void</span>
116 (*<b>FT_Free_Func</b>)( <a href="ft2-system_interface.html#FT_Memory">FT_Memory</a> memory,
117 <span class="keyword">void</span>* block );
120 <table align=center width="87%"><tr><td>
121 <p>A function used to release a given block of memory.</p>
122 </td></tr></table><br>
123 <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>input</b></em></td></tr><tr><td>
125 <table cellpadding=3 border=0>
126 <tr valign=top><td><b>memory</b></td><td>
127 <p>A handle to the source memory manager.</p>
129 <tr valign=top><td><b>block</b></td><td>
130 <p>The address of the target memory block.</p>
136 <table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td>
137 <td width="100%"></td>
138 <td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>
140 <table align=center width="75%"><tr><td>
141 <h4><a name="FT_Realloc_Func">FT_Realloc_Func</a></h4>
142 <table align=center width="87%"><tr><td>
143 Defined in FT_SYSTEM_H (freetype/ftsystem.h).
144 </td></tr></table><br>
145 <table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
147 <span class="keyword">typedef</span> <span class="keyword">void</span>*
148 (*<b>FT_Realloc_Func</b>)( <a href="ft2-system_interface.html#FT_Memory">FT_Memory</a> memory,
149 <span class="keyword">long</span> cur_size,
150 <span class="keyword">long</span> new_size,
151 <span class="keyword">void</span>* block );
154 <table align=center width="87%"><tr><td>
155 <p>A function used to re-allocate a given block of memory.</p>
156 </td></tr></table><br>
157 <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>input</b></em></td></tr><tr><td>
159 <table cellpadding=3 border=0>
160 <tr valign=top><td><b>memory</b></td><td>
161 <p>A handle to the source memory manager.</p>
163 <tr valign=top><td><b>cur_size</b></td><td>
164 <p>The block's current size in bytes.</p>
166 <tr valign=top><td><b>new_size</b></td><td>
167 <p>The block's requested new size.</p>
169 <tr valign=top><td><b>block</b></td><td>
170 <p>The block's current address.</p>
174 <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>return</b></em></td></tr><tr><td>
175 <p>New block address. 0 in case of memory shortage.</p>
177 <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>note</b></em></td></tr><tr><td>
178 <p>In case of error, the old block must still be available.</p>
182 <table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td>
183 <td width="100%"></td>
184 <td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>
186 <table align=center width="75%"><tr><td>
187 <h4><a name="FT_MemoryRec">FT_MemoryRec</a></h4>
188 <table align=center width="87%"><tr><td>
189 Defined in FT_SYSTEM_H (freetype/ftsystem.h).
190 </td></tr></table><br>
191 <table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
193 <span class="keyword">struct</span> FT_MemoryRec_
195 <span class="keyword">void</span>* user;
196 <a href="ft2-system_interface.html#FT_Alloc_Func">FT_Alloc_Func</a> alloc;
197 <a href="ft2-system_interface.html#FT_Free_Func">FT_Free_Func</a> free;
198 <a href="ft2-system_interface.html#FT_Realloc_Func">FT_Realloc_Func</a> realloc;
202 <table align=center width="87%"><tr><td>
203 <p>A structure used to describe a given memory manager to FreeType 2.</p>
204 </td></tr></table><br>
205 <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>fields</b></em></td></tr><tr><td>
207 <table cellpadding=3 border=0>
208 <tr valign=top><td><b>user</b></td><td>
209 <p>A generic typeless pointer for user data.</p>
211 <tr valign=top><td><b>alloc</b></td><td>
212 <p>A pointer type to an allocation function.</p>
214 <tr valign=top><td><b>free</b></td><td>
215 <p>A pointer type to an memory freeing function.</p>
217 <tr valign=top><td><b>realloc</b></td><td>
218 <p>A pointer type to a reallocation function.</p>
224 <table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td>
225 <td width="100%"></td>
226 <td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>
228 <table align=center width="75%"><tr><td>
229 <h4><a name="FT_Stream">FT_Stream</a></h4>
230 <table align=center width="87%"><tr><td>
231 Defined in FT_SYSTEM_H (freetype/ftsystem.h).
232 </td></tr></table><br>
233 <table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
235 <span class="keyword">typedef</span> <span class="keyword">struct</span> FT_StreamRec_* <b>FT_Stream</b>;
238 <table align=center width="87%"><tr><td>
239 <p>A handle to an input stream.</p>
240 </td></tr></table><br>
243 <table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td>
244 <td width="100%"></td>
245 <td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>
247 <table align=center width="75%"><tr><td>
248 <h4><a name="FT_StreamDesc">FT_StreamDesc</a></h4>
249 <table align=center width="87%"><tr><td>
250 Defined in FT_SYSTEM_H (freetype/ftsystem.h).
251 </td></tr></table><br>
252 <table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
254 <span class="keyword">typedef</span> <span class="keyword">union</span> FT_StreamDesc_
256 <span class="keyword">long</span> value;
257 <span class="keyword">void</span>* pointer;
259 } <b>FT_StreamDesc</b>;
262 <table align=center width="87%"><tr><td>
263 <p>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.</p>
264 </td></tr></table><br>
267 <table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td>
268 <td width="100%"></td>
269 <td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>
271 <table align=center width="75%"><tr><td>
272 <h4><a name="FT_Stream_IoFunc">FT_Stream_IoFunc</a></h4>
273 <table align=center width="87%"><tr><td>
274 Defined in FT_SYSTEM_H (freetype/ftsystem.h).
275 </td></tr></table><br>
276 <table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
278 <span class="keyword">typedef</span> <span class="keyword">unsigned</span> <span class="keyword">long</span>
279 (*<b>FT_Stream_IoFunc</b>)( <a href="ft2-system_interface.html#FT_Stream">FT_Stream</a> stream,
280 <span class="keyword">unsigned</span> <span class="keyword">long</span> offset,
281 <span class="keyword">unsigned</span> <span class="keyword">char</span>* buffer,
282 <span class="keyword">unsigned</span> <span class="keyword">long</span> count );
285 <table align=center width="87%"><tr><td>
286 <p>A function used to seek and read data from a given input stream.</p>
287 </td></tr></table><br>
288 <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>input</b></em></td></tr><tr><td>
290 <table cellpadding=3 border=0>
291 <tr valign=top><td><b>stream</b></td><td>
292 <p>A handle to the source stream.</p>
294 <tr valign=top><td><b>offset</b></td><td>
295 <p>The offset of read in stream (always from start).</p>
297 <tr valign=top><td><b>buffer</b></td><td>
298 <p>The address of the read buffer.</p>
300 <tr valign=top><td><b>count</b></td><td>
301 <p>The number of bytes to read from the stream.</p>
305 <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>return</b></em></td></tr><tr><td>
306 <p>The number of bytes effectively read by the stream.</p>
308 <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>note</b></em></td></tr><tr><td>
309 <p>This function might be called to perform a seek or skip operation with a ‘count’ of 0. A non-zero return value then indicates an error.</p>
313 <table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td>
314 <td width="100%"></td>
315 <td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>
317 <table align=center width="75%"><tr><td>
318 <h4><a name="FT_Stream_CloseFunc">FT_Stream_CloseFunc</a></h4>
319 <table align=center width="87%"><tr><td>
320 Defined in FT_SYSTEM_H (freetype/ftsystem.h).
321 </td></tr></table><br>
322 <table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
324 <span class="keyword">typedef</span> <span class="keyword">void</span>
325 (*<b>FT_Stream_CloseFunc</b>)( <a href="ft2-system_interface.html#FT_Stream">FT_Stream</a> stream );
328 <table align=center width="87%"><tr><td>
329 <p>A function used to close a given input stream.</p>
330 </td></tr></table><br>
331 <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>input</b></em></td></tr><tr><td>
333 <table cellpadding=3 border=0>
334 <tr valign=top><td><b>stream</b></td><td>
335 <p>A handle to the target stream.</p>
341 <table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td>
342 <td width="100%"></td>
343 <td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>
345 <table align=center width="75%"><tr><td>
346 <h4><a name="FT_StreamRec">FT_StreamRec</a></h4>
347 <table align=center width="87%"><tr><td>
348 Defined in FT_SYSTEM_H (freetype/ftsystem.h).
349 </td></tr></table><br>
350 <table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
352 <span class="keyword">typedef</span> <span class="keyword">struct</span> FT_StreamRec_
354 <span class="keyword">unsigned</span> <span class="keyword">char</span>* base;
355 <span class="keyword">unsigned</span> <span class="keyword">long</span> size;
356 <span class="keyword">unsigned</span> <span class="keyword">long</span> pos;
358 <a href="ft2-system_interface.html#FT_StreamDesc">FT_StreamDesc</a> descriptor;
359 <a href="ft2-system_interface.html#FT_StreamDesc">FT_StreamDesc</a> pathname;
360 <a href="ft2-system_interface.html#FT_Stream_IoFunc">FT_Stream_IoFunc</a> read;
361 <a href="ft2-system_interface.html#FT_Stream_CloseFunc">FT_Stream_CloseFunc</a> close;
363 <a href="ft2-system_interface.html#FT_Memory">FT_Memory</a> memory;
364 <span class="keyword">unsigned</span> <span class="keyword">char</span>* cursor;
365 <span class="keyword">unsigned</span> <span class="keyword">char</span>* limit;
367 } <b>FT_StreamRec</b>;
370 <table align=center width="87%"><tr><td>
371 <p>A structure used to describe an input stream.</p>
372 </td></tr></table><br>
373 <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>input</b></em></td></tr><tr><td>
375 <table cellpadding=3 border=0>
376 <tr valign=top><td><b>base</b></td><td>
377 <p>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.</p>
379 <tr valign=top><td><b>size</b></td><td>
380 <p>The stream size in bytes.</p>
382 <tr valign=top><td><b>pos</b></td><td>
383 <p>The current position within the stream.</p>
385 <tr valign=top><td><b>descriptor</b></td><td>
386 <p>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.</p>
388 <tr valign=top><td><b>pathname</b></td><td>
389 <p>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).</p>
391 <tr valign=top><td><b>read</b></td><td>
392 <p>The stream's input function.</p>
394 <tr valign=top><td><b>close</b></td><td>
395 <p>The stream's close function.</p>
397 <tr valign=top><td><b>memory</b></td><td>
398 <p>The memory manager to use to preload frames. This is set internally by FreeType and shouldn't be touched by stream implementations.</p>
400 <tr valign=top><td><b>cursor</b></td><td>
401 <p>This field is set and used internally by FreeType when parsing frames.</p>
403 <tr valign=top><td><b>limit</b></td><td>
404 <p>This field is set and used internally by FreeType when parsing frames.</p>
410 <table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td>
411 <td width="100%"></td>
412 <td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>