1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<title>AllegroGL: Texture Routines</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<link href="navtree.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="navtree.js"></script>
<script type="text/javascript" src="resize.js"></script>
<script type="text/javascript">
$(document).ready(initResizable);
</script>
<link href="alleggl.css" rel="stylesheet" type="text/css"/>
</head>
<body>
<!-- Generated by Doxygen 1.7.3 -->
<div id="top">
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
<tbody>
<tr style="height: 56px;">
<td style="padding-left: 0.5em;">
<div id="projectname">AllegroGL <span id="projectnumber">0.4.4</span></div>
</td>
</tr>
</tbody>
</table>
</div>
<div id="navrow1" class="tabs">
<ul class="tablist">
<li><a href="index.html"><span>Main Page</span></a></li>
<li><a href="pages.html"><span>Related Pages</span></a></li>
<li><a href="modules.html"><span>Modules</span></a></li>
<li><a href="files.html"><span>Files</span></a></li>
</ul>
</div>
</div>
<div id="side-nav" class="ui-resizable side-nav-resizable">
<div id="nav-tree">
<div id="nav-tree-contents">
</div>
</div>
<div id="splitbar" style="-moz-user-select:none;"
class="ui-resizable-handle">
</div>
</div>
<script type="text/javascript">
initNavTree('group__texture.html','');
</script>
<div id="doc-content">
<div class="header">
<div class="headertitle">
<h1>Texture Routines</h1> </div>
</div>
<div class="contents">
<p>AllegroGL provides functions to allow using Allegro BITMAP objects to be used as OpenGL textures.
<a href="#_details">More...</a></p>
<h2><a name="member-group"></a>
Texture routines</h2>
<ul>
<li>int <a class="el" href="group__texture.html#gab5393ecc10a2a31da7eb80c889af89ac">allegro_gl_use_mipmapping</a> (int enable)
<dl class="el"><dd class="mdescRight">Tell AllegroGL to use Mipmapping or not when generating textures via its functions. <a href="#gab5393ecc10a2a31da7eb80c889af89ac"></a><br/></dl><li>int <a class="el" href="group__texture.html#ga1d88f4ebc7ed1ecd65640b72ea46a71e">allegro_gl_use_alpha_channel</a> (int enable)
<dl class="el"><dd class="mdescRight">Tell AllegroGL to use Alpha channel or not when generating textures via its functions. <a href="#ga1d88f4ebc7ed1ecd65640b72ea46a71e"></a><br/></dl><li>int <a class="el" href="group__texture.html#ga3ec0a1c4c6656f13c8398bab7a1293f2">allegro_gl_flip_texture</a> (int enable)
<dl class="el"><dd class="mdescRight">Tell AllegroGL to flip the texture vertically or not when generating textures via its functions, to conform to the usual OpenGL texture coordinate system (increasing upwards). <a href="#ga3ec0a1c4c6656f13c8398bab7a1293f2"></a><br/></dl><li>int <a class="el" href="group__texture.html#ga6996c14538e18b1614f91d34b2d4d691">allegro_gl_check_texture</a> (BITMAP *bmp)
<dl class="el"><dd class="mdescRight">Checks whether the specified bitmap is of the proper size for texturing. <a href="#ga6996c14538e18b1614f91d34b2d4d691"></a><br/></dl><li>int <a class="el" href="group__texture.html#gab0cf4dc0ddcb45f5b067d08aed1c88e6">allegro_gl_check_texture_ex</a> (int flags, BITMAP *bmp, GLint internal_format)
<dl class="el"><dd class="mdescRight">Checks whether the specified bitmap is of the proper size for texturing. <a href="#gab0cf4dc0ddcb45f5b067d08aed1c88e6"></a><br/></dl><li>GLint <a class="el" href="group__texture.html#ga2392fe7a8dd6db65532160821804aa68">allegro_gl_get_texture_format</a> (BITMAP *bmp)
<dl class="el"><dd class="mdescRight">Returns the OpenGL internal texture format for this bitmap. <a href="#ga2392fe7a8dd6db65532160821804aa68"></a><br/></dl><li>GLint <a class="el" href="group__texture.html#ga5d535e8af776dd449cc4755b9e3585b1">allegro_gl_set_texture_format</a> (GLint format)
<dl class="el"><dd class="mdescRight">Sets the color format you'd like OpenGL to use for its textures. <a href="#ga5d535e8af776dd449cc4755b9e3585b1"></a><br/></dl><li><a class="anchor" id="ga59f7129dd541d2e5a291d36bf90b7289"></a><!-- doxytag: member="texture::allegro_gl_get_bitmap_type" ref="ga59f7129dd541d2e5a291d36bf90b7289" args="(BITMAP *bmp)" -->
GLenum <a class="el" href="group__texture.html#ga59f7129dd541d2e5a291d36bf90b7289">allegro_gl_get_bitmap_type</a> (BITMAP *bmp)
<dl class="el"><dd class="mdescRight">AllegroGL will generate mipmaps for this texture. <br/></dl><li><a class="anchor" id="ga83b2b13cb35dd4b4e9e874173a246581"></a><!-- doxytag: member="texture::allegro_gl_get_bitmap_color_format" ref="ga83b2b13cb35dd4b4e9e874173a246581" args="(BITMAP *bmp)" -->
GLenum <a class="el" href="group__texture.html#ga83b2b13cb35dd4b4e9e874173a246581">allegro_gl_get_bitmap_color_format</a> (BITMAP *bmp)
<dl class="el"><dd class="mdescRight">AllegroGL will generate mipmaps for this texture. <br/></dl><li>GLuint <a class="el" href="group__texture.html#gae071354f76bc28e1bafbd90bdecbc0c9">allegro_gl_make_texture</a> (BITMAP *bmp)
<dl class="el"><dd class="mdescRight">Uploads an Allegro BITMAP to the GL driver as a texture. <a href="#gae071354f76bc28e1bafbd90bdecbc0c9"></a><br/></dl><li>GLuint <a class="el" href="group__texture.html#gaeb33dfbbc1725f5132c10ac32ef6800d">allegro_gl_make_masked_texture</a> (BITMAP *bmp)
<dl class="el"><dd class="mdescRight">Uploads an Allegro BITMAP to the GL driver as a texture. <a href="#gaeb33dfbbc1725f5132c10ac32ef6800d"></a><br/></dl><li>GLuint <a class="el" href="group__texture.html#gaf3a48c555068e7051171255c1011150a">allegro_gl_make_texture_ex</a> (int flags, BITMAP *bmp, GLint internal_format)
<dl class="el"><dd class="mdescRight">Uploads an Allegro BITMAP to the GL driver as a texture. <a href="#gaf3a48c555068e7051171255c1011150a"></a><br/></dl><li><a class="anchor" id="gabaf179e577a9328a751e92e3603f0746"></a><!-- doxytag: member="texture::AGL_TEXTURE_MIPMAP" ref="gabaf179e577a9328a751e92e3603f0746" args="" -->
#define <a class="el" href="group__texture.html#gabaf179e577a9328a751e92e3603f0746">AGL_TEXTURE_MIPMAP</a>   0x01
<dl class="el"><dd class="mdescRight">AllegroGL will generate mipmaps for this texture. <br/></dl><li><a class="anchor" id="ga8cc859eadf1610b424cd9188e716f432"></a><!-- doxytag: member="texture::AGL_TEXTURE_HAS_ALPHA" ref="ga8cc859eadf1610b424cd9188e716f432" args="" -->
#define <a class="el" href="group__texture.html#ga8cc859eadf1610b424cd9188e716f432">AGL_TEXTURE_HAS_ALPHA</a>   0x02
<dl class="el"><dd class="mdescRight">Tell AllegroGL that the bitmap had an alpha channel, so it should be preserved when generating the texture. <br/></dl><li>#define <a class="el" href="group__texture.html#gadeffe4feb290278035beacedb284a010">AGL_TEXTURE_FLIP</a>   0x04
<dl class="el"><dd class="mdescRight">Flip the texture on the x-axis. <a href="#gadeffe4feb290278035beacedb284a010"></a><br/></dl><li>#define <a class="el" href="group__texture.html#gaba184d573c65f33b35d1d57936607d08">AGL_TEXTURE_MASKED</a>   0x08
<dl class="el"><dd class="mdescRight">Generate an alpha channel for this texture, based on the Allegro mask color. <a href="#gaba184d573c65f33b35d1d57936607d08"></a><br/></dl><li>#define <a class="el" href="group__texture.html#gaa8b7246edc7ec019ec3b434eb0cacdf2">AGL_TEXTURE_RESCALE</a>   0x10
<dl class="el"><dd class="mdescRight">Tell AllegroGL to allow rescaling of the bitmap. <a href="#gaa8b7246edc7ec019ec3b434eb0cacdf2"></a><br/></dl><li><a class="anchor" id="gad67cfdfd21ef2cae75b03cb871e57f4a"></a><!-- doxytag: member="texture::AGL_TEXTURE_ALPHA_ONLY" ref="gad67cfdfd21ef2cae75b03cb871e57f4a" args="" -->
#define <a class="el" href="group__texture.html#gad67cfdfd21ef2cae75b03cb871e57f4a">AGL_TEXTURE_ALPHA_ONLY</a>   0x20
<dl class="el"><dd class="mdescRight">Tell AllegroGL that the specified BITMAP is an 8-bpp alpha-only BITMAP. <br/></dl></ul>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<p>AllegroGL provides functions to allow using Allegro BITMAP objects to be used as OpenGL textures. </p>
<hr/><h2>Define Documentation</h2>
<a class="anchor" id="gadeffe4feb290278035beacedb284a010"></a><!-- doxytag: member="alleggl.h::AGL_TEXTURE_FLIP" ref="gadeffe4feb290278035beacedb284a010" args="" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">#define AGL_TEXTURE_FLIP   0x04</td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Flip the texture on the x-axis. </p>
<p>OpenGL uses the bottom-left corner of the texture as (0,0), so if you need your texture to be flipped to make (0,0) the top-left corner, you need to use this flag. </p>
<p>Definition at line <a class="el" href="alleggl_8h_source.html#l00529">529</a> of file <a class="el" href="alleggl_8h_source.html">alleggl.h</a>.</p>
<p>Referenced by <a class="el" href="fontconv_8c_source.html#l00688">allegro_gl_convert_allegro_font_ex()</a>.</p>
</div>
</div>
<a class="anchor" id="gaba184d573c65f33b35d1d57936607d08"></a><!-- doxytag: member="alleggl.h::AGL_TEXTURE_MASKED" ref="gaba184d573c65f33b35d1d57936607d08" args="" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">#define AGL_TEXTURE_MASKED   0x08</td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Generate an alpha channel for this texture, based on the Allegro mask color. </p>
<p>Make sure the target format supports an alpha channel. </p>
<p>Definition at line <a class="el" href="alleggl_8h_source.html#l00534">534</a> of file <a class="el" href="alleggl_8h_source.html">alleggl.h</a>.</p>
<p>Referenced by <a class="el" href="fontconv_8c_source.html#l00688">allegro_gl_convert_allegro_font_ex()</a>.</p>
</div>
</div>
<a class="anchor" id="gaa8b7246edc7ec019ec3b434eb0cacdf2"></a><!-- doxytag: member="alleggl.h::AGL_TEXTURE_RESCALE" ref="gaa8b7246edc7ec019ec3b434eb0cacdf2" args="" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">#define AGL_TEXTURE_RESCALE   0x10</td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Tell AllegroGL to allow rescaling of the bitmap. </p>
<p>By default, AllegroGL will not rescale the bitmap to fit into a texture. You can override this behavior by using this flag. </p>
<p>Definition at line <a class="el" href="alleggl_8h_source.html#l00540">540</a> of file <a class="el" href="alleggl_8h_source.html">alleggl.h</a>.</p>
</div>
</div>
<hr/><h2>Function Documentation</h2>
<a class="anchor" id="gab5393ecc10a2a31da7eb80c889af89ac"></a><!-- doxytag: member="alleggl.h::allegro_gl_use_mipmapping" ref="gab5393ecc10a2a31da7eb80c889af89ac" args="(int enable)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int allegro_gl_use_mipmapping </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>enable</em></td><td>)</td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Tell AllegroGL to use Mipmapping or not when generating textures via its functions. </p>
<p>This will not affect outside OpenGL states. Default is FALSE (off).</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="group__texture.html#ga6996c14538e18b1614f91d34b2d4d691" title="Checks whether the specified bitmap is of the proper size for texturing.">allegro_gl_check_texture()</a>, <a class="el" href="group__texture.html#gae071354f76bc28e1bafbd90bdecbc0c9" title="Uploads an Allegro BITMAP to the GL driver as a texture.">allegro_gl_make_texture()</a> <a class="el" href="group__texture.html#gaeb33dfbbc1725f5132c10ac32ef6800d" title="Uploads an Allegro BITMAP to the GL driver as a texture.">allegro_gl_make_masked_texture()</a></dd></dl>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">enable</td><td>Set to TRUE to enable mipmapping, FALSE otherwise. </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>The previous mode (either TRUE or FALSE).</dd></dl>
<dl class="deprecated"><dt><b><a class="el" href="deprecated.html#_deprecated000017">Deprecated:</a></b></dt><dd></dd></dl>
<p>Definition at line <a class="el" href="texture_8c_source.html#l00415">415</a> of file <a class="el" href="texture_8c_source.html">texture.c</a>.</p>
</div>
</div>
<a class="anchor" id="ga1d88f4ebc7ed1ecd65640b72ea46a71e"></a><!-- doxytag: member="alleggl.h::allegro_gl_use_alpha_channel" ref="ga1d88f4ebc7ed1ecd65640b72ea46a71e" args="(int enable)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int allegro_gl_use_alpha_channel </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>enable</em></td><td>)</td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Tell AllegroGL to use Alpha channel or not when generating textures via its functions. </p>
<p>This will not affect outside OpenGL states. Default is FALSE (off).</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="group__texture.html#ga6996c14538e18b1614f91d34b2d4d691" title="Checks whether the specified bitmap is of the proper size for texturing.">allegro_gl_check_texture()</a>, <a class="el" href="group__texture.html#gae071354f76bc28e1bafbd90bdecbc0c9" title="Uploads an Allegro BITMAP to the GL driver as a texture.">allegro_gl_make_texture()</a>, <a class="el" href="group__texture.html#gaeb33dfbbc1725f5132c10ac32ef6800d" title="Uploads an Allegro BITMAP to the GL driver as a texture.">allegro_gl_make_masked_texture()</a></dd></dl>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">enable</td><td>Set to TRUE to enable textures with alpha channel, FALSE otherwise. </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>The previous mode (either TRUE or FALSE).</dd></dl>
<dl class="deprecated"><dt><b><a class="el" href="deprecated.html#_deprecated000018">Deprecated:</a></b></dt><dd></dd></dl>
<p>Definition at line <a class="el" href="texture_8c_source.html#l00439">439</a> of file <a class="el" href="texture_8c_source.html">texture.c</a>.</p>
</div>
</div>
<a class="anchor" id="ga3ec0a1c4c6656f13c8398bab7a1293f2"></a><!-- doxytag: member="alleggl.h::allegro_gl_flip_texture" ref="ga3ec0a1c4c6656f13c8398bab7a1293f2" args="(int enable)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int allegro_gl_flip_texture </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>enable</em></td><td>)</td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Tell AllegroGL to flip the texture vertically or not when generating textures via its functions, to conform to the usual OpenGL texture coordinate system (increasing upwards). </p>
<p>Default is TRUE (on).</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="group__texture.html#ga6996c14538e18b1614f91d34b2d4d691" title="Checks whether the specified bitmap is of the proper size for texturing.">allegro_gl_check_texture()</a>, <a class="el" href="group__texture.html#gae071354f76bc28e1bafbd90bdecbc0c9" title="Uploads an Allegro BITMAP to the GL driver as a texture.">allegro_gl_make_texture()</a>, <a class="el" href="group__texture.html#gaeb33dfbbc1725f5132c10ac32ef6800d" title="Uploads an Allegro BITMAP to the GL driver as a texture.">allegro_gl_make_masked_texture()</a></dd></dl>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">enable</td><td>Set to TRUE to enable textures with alpha channel, FALSE otherwise. </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>The previous mode (either TRUE or FALSE).</dd></dl>
<dl class="deprecated"><dt><b><a class="el" href="deprecated.html#_deprecated000019">Deprecated:</a></b></dt><dd></dd></dl>
<p>Definition at line <a class="el" href="texture_8c_source.html#l00464">464</a> of file <a class="el" href="texture_8c_source.html">texture.c</a>.</p>
</div>
</div>
<a class="anchor" id="ga6996c14538e18b1614f91d34b2d4d691"></a><!-- doxytag: member="alleggl.h::allegro_gl_check_texture" ref="ga6996c14538e18b1614f91d34b2d4d691" args="(BITMAP *bmp)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int allegro_gl_check_texture </td>
<td>(</td>
<td class="paramtype">BITMAP * </td>
<td class="paramname"><em>bmp</em></td><td>)</td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Checks whether the specified bitmap is of the proper size for texturing. </p>
<p>This checks for the card's limit on texture sizes.</p>
<p><b>Important</b> <b>note:</b> allegro_gl_check_texture does not depend on the current state of the texture memory of the driver. This function may return TRUE although there is not enough memory to currently make the texture resident. You may check if the texture is actually resident with glAreTexturesResident().</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="group__texture.html#gab0cf4dc0ddcb45f5b067d08aed1c88e6" title="Checks whether the specified bitmap is of the proper size for texturing.">allegro_gl_check_texture_ex()</a>, <a class="el" href="group__texture.html#gaf3a48c555068e7051171255c1011150a" title="Uploads an Allegro BITMAP to the GL driver as a texture.">allegro_gl_make_texture_ex()</a></dd></dl>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">bmp</td><td>The bitmap to be converted to a texture.</td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>TRUE if the bitmap can be made a texture of, FALSE otherwise.</dd></dl>
<dl class="deprecated"><dt><b><a class="el" href="deprecated.html#_deprecated000020">Deprecated:</a></b></dt><dd></dd></dl>
<p>Definition at line <a class="el" href="texture_8c_source.html#l00557">557</a> of file <a class="el" href="texture_8c_source.html">texture.c</a>.</p>
<p>References <a class="el" href="texture_8c_source.html#l00495">allegro_gl_check_texture_ex()</a>.</p>
</div>
</div>
<a class="anchor" id="gab0cf4dc0ddcb45f5b067d08aed1c88e6"></a><!-- doxytag: member="alleggl.h::allegro_gl_check_texture_ex" ref="gab0cf4dc0ddcb45f5b067d08aed1c88e6" args="(int flags, BITMAP *bmp, GLint internal_format)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int allegro_gl_check_texture_ex </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>flags</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">BITMAP * </td>
<td class="paramname"><em>bmp</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">GLint </td>
<td class="paramname"><em>internal_format</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Checks whether the specified bitmap is of the proper size for texturing. </p>
<p>This checks for the card's limit on texture sizes.</p>
<p>The parameters to this function are identical to those of <a class="el" href="group__texture.html#gaf3a48c555068e7051171255c1011150a" title="Uploads an Allegro BITMAP to the GL driver as a texture.">allegro_gl_make_texture_ex()</a>.</p>
<p><b>Important</b> <b>note:</b> allegro_gl_check_texture does not depend on the current state of the texture memory of the driver. This function may return TRUE although there is not enough memory to currently make the texture resident. You may check if the texture is actually resident with glAreTexturesResident().</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="group__texture.html#gaf3a48c555068e7051171255c1011150a" title="Uploads an Allegro BITMAP to the GL driver as a texture.">allegro_gl_make_texture_ex()</a></dd></dl>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">flags</td><td>The bitmap conversion flags. </td></tr>
<tr><td class="paramname">bmp</td><td>The bitmap to be converted to a texture. </td></tr>
<tr><td class="paramname">internal_format</td><td>The internal format to convert to.</td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>TRUE if the bitmap can be made a texture of, FALSE otherwise. </dd></dl>
<p>Definition at line <a class="el" href="texture_8c_source.html#l00495">495</a> of file <a class="el" href="texture_8c_source.html">texture.c</a>.</p>
<p>References <a class="el" href="texture_8c_source.html#l01165">allegro_gl_make_texture_ex()</a>.</p>
<p>Referenced by <a class="el" href="texture_8c_source.html#l00557">allegro_gl_check_texture()</a>, and <a class="el" href="fontconv_8c_source.html#l00688">allegro_gl_convert_allegro_font_ex()</a>.</p>
</div>
</div>
<a class="anchor" id="ga2392fe7a8dd6db65532160821804aa68"></a><!-- doxytag: member="alleggl.h::allegro_gl_get_texture_format" ref="ga2392fe7a8dd6db65532160821804aa68" args="(BITMAP *bmp)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">GLint allegro_gl_get_texture_format </td>
<td>(</td>
<td class="paramtype">BITMAP * </td>
<td class="paramname"><em>bmp</em></td><td>)</td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Returns the OpenGL internal texture format for this bitmap. </p>
<p>If left to default, it returns the number of color components in the bitmap. Otherwise, it simply returns the user defined value. If the bitmap parameter is NULL, then it returns the currently set format, or -1 if none were previously set. 8 bpp bitmaps are assumed to be alpha channels only (GL_ALPHA8) by default.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="group__texture.html#ga5d535e8af776dd449cc4755b9e3585b1" title="Sets the color format you'd like OpenGL to use for its textures.">allegro_gl_set_texture_format()</a>, <a class="el" href="group__texture.html#gae071354f76bc28e1bafbd90bdecbc0c9" title="Uploads an Allegro BITMAP to the GL driver as a texture.">allegro_gl_make_texture()</a></dd></dl>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">bmp</td><td>The bitmap to get the information of. </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>The OpenGL internal texture format.</dd></dl>
<dl class="deprecated"><dt><b><a class="el" href="deprecated.html#_deprecated000015">Deprecated:</a></b></dt><dd></dd></dl>
<p>Definition at line <a class="el" href="texture_8c_source.html#l00248">248</a> of file <a class="el" href="texture_8c_source.html">texture.c</a>.</p>
<p>Referenced by <a class="el" href="fontconv_8c_source.html#l00623">allegro_gl_convert_allegro_font()</a>.</p>
</div>
</div>
<a class="anchor" id="ga5d535e8af776dd449cc4755b9e3585b1"></a><!-- doxytag: member="alleggl.h::allegro_gl_set_texture_format" ref="ga5d535e8af776dd449cc4755b9e3585b1" args="(GLint format)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">GLint allegro_gl_set_texture_format </td>
<td>(</td>
<td class="paramtype">GLint </td>
<td class="paramname"><em>format</em></td><td>)</td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Sets the color format you'd like OpenGL to use for its textures. </p>
<p>You can pass any of the available GL_* constants that describe the internal format (GL_ALPHA4...GL_RGBA16). It is recommended that you check for the availability of the format from the client, using <a class="el" href="group__core.html#ga444d507eaeb5ba800787f6a81827615d" title="Returns the OpenGL version number of the client (the computer the program is running on)...">allegro_gl_opengl_version()</a>. No checking will be done as to the validity of the format. The format is a recommendation to the driver, so there is no guarentee that the actual format used will be the one you chose - this is implementation dependant. This call will affect all subsequent calls to <a class="el" href="group__texture.html#gae071354f76bc28e1bafbd90bdecbc0c9" title="Uploads an Allegro BITMAP to the GL driver as a texture.">allegro_gl_make_texture()</a> and <a class="el" href="group__texture.html#gaeb33dfbbc1725f5132c10ac32ef6800d" title="Uploads an Allegro BITMAP to the GL driver as a texture.">allegro_gl_make_masked_texture()</a>.</p>
<p>To revert to the default AllegroGL format, pass -1 as the format.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="group__texture.html#ga2392fe7a8dd6db65532160821804aa68" title="Returns the OpenGL internal texture format for this bitmap.">allegro_gl_get_texture_format()</a></dd></dl>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">format</td><td>The OpenGL internal texture format. </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>The previous value of the texture format.</dd></dl>
<dl class="deprecated"><dt><b><a class="el" href="deprecated.html#_deprecated000016">Deprecated:</a></b></dt><dd></dd></dl>
<p>Definition at line <a class="el" href="texture_8c_source.html#l00282">282</a> of file <a class="el" href="texture_8c_source.html">texture.c</a>.</p>
</div>
</div>
<a class="anchor" id="gae071354f76bc28e1bafbd90bdecbc0c9"></a><!-- doxytag: member="alleggl.h::allegro_gl_make_texture" ref="gae071354f76bc28e1bafbd90bdecbc0c9" args="(BITMAP *bmp)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">GLuint allegro_gl_make_texture </td>
<td>(</td>
<td class="paramtype">BITMAP * </td>
<td class="paramname"><em>bmp</em></td><td>)</td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Uploads an Allegro BITMAP to the GL driver as a texture. </p>
<dl class="deprecated"><dt><b><a class="el" href="deprecated.html#_deprecated000021">Deprecated:</a></b></dt><dd></dd></dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="group__texture.html#gaf3a48c555068e7051171255c1011150a" title="Uploads an Allegro BITMAP to the GL driver as a texture.">allegro_gl_make_texture_ex()</a> </dd></dl>
<p>Definition at line <a class="el" href="texture_8c_source.html#l01383">1383</a> of file <a class="el" href="texture_8c_source.html">texture.c</a>.</p>
<p>References <a class="el" href="texture_8c_source.html#l01165">allegro_gl_make_texture_ex()</a>.</p>
</div>
</div>
<a class="anchor" id="gaeb33dfbbc1725f5132c10ac32ef6800d"></a><!-- doxytag: member="alleggl.h::allegro_gl_make_masked_texture" ref="gaeb33dfbbc1725f5132c10ac32ef6800d" args="(BITMAP *bmp)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">GLuint allegro_gl_make_masked_texture </td>
<td>(</td>
<td class="paramtype">BITMAP * </td>
<td class="paramname"><em>bmp</em></td><td>)</td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Uploads an Allegro BITMAP to the GL driver as a texture. </p>
<dl class="deprecated"><dt><b><a class="el" href="deprecated.html#_deprecated000022">Deprecated:</a></b></dt><dd></dd></dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="group__texture.html#gaf3a48c555068e7051171255c1011150a" title="Uploads an Allegro BITMAP to the GL driver as a texture.">allegro_gl_make_texture_ex()</a> </dd></dl>
<p>Definition at line <a class="el" href="texture_8c_source.html#l01402">1402</a> of file <a class="el" href="texture_8c_source.html">texture.c</a>.</p>
<p>References <a class="el" href="texture_8c_source.html#l01165">allegro_gl_make_texture_ex()</a>.</p>
</div>
</div>
<a class="anchor" id="gaf3a48c555068e7051171255c1011150a"></a><!-- doxytag: member="alleggl.h::allegro_gl_make_texture_ex" ref="gaf3a48c555068e7051171255c1011150a" args="(int flags, BITMAP *bmp, GLint internal_format)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">GLuint allegro_gl_make_texture_ex </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>flags</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">BITMAP * </td>
<td class="paramname"><em>bmp</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">GLint </td>
<td class="paramname"><em>internal_format</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Uploads an Allegro BITMAP to the GL driver as a texture. </p>
<p>The bitmap must be a memory bitmap (note that it can be a subbitmap).</p>
<p>Each bitmap will be converted to a single texture object, with all its size limitations imposed by the video driver and hardware.</p>
<p>The bitmap should conform to the size limitations imposed by the video driver. That is, if ARB_texture_non_power_of_two is not supported, then the BITMAP must be power-of-two sized. Otherwise, AllegroGL will pick the best format for the bitmap.</p>
<p>The original bitmap will NOT be modified.</p>
<p>The flags parameter controls how the texture is generated. It can be a logical OR (|) of any of the following:</p>
<p><a class="el" href="group__texture.html#gabaf179e577a9328a751e92e3603f0746" title="AllegroGL will generate mipmaps for this texture.">AGL_TEXTURE_MIPMAP</a> <a class="el" href="group__texture.html#ga8cc859eadf1610b424cd9188e716f432" title="Tell AllegroGL that the bitmap had an alpha channel, so it should be preserved when generating the te...">AGL_TEXTURE_HAS_ALPHA</a> <a class="el" href="group__texture.html#gadeffe4feb290278035beacedb284a010" title="Flip the texture on the x-axis.">AGL_TEXTURE_FLIP</a> <a class="el" href="group__texture.html#gaba184d573c65f33b35d1d57936607d08" title="Generate an alpha channel for this texture, based on the Allegro mask color.">AGL_TEXTURE_MASKED</a> <a class="el" href="group__texture.html#gaa8b7246edc7ec019ec3b434eb0cacdf2" title="Tell AllegroGL to allow rescaling of the bitmap.">AGL_TEXTURE_RESCALE</a></p>
<p>AllegroGL will create a texture with the specified texel format. The texel format should be any of the valid formats that can be specified to glTexImage2D(). No validity checks will be performed by AllegroGL. If you want AllegroGL to automatically determine the format to use based on the BITMAP, use -1 as the format specifier.</p>
<p>A valid GL Rendering Context must have been established, which means you cannot use this function before having called set_gfx_mode() with a valid OpenGL mode.</p>
<p><b>Important</b> <b>note:</b> on 32 bit bitmap in RGBA mode, the alpha channel created by Allegro is set to all 0 by default. This will cause the texture to not show up in 32bpp modes if alpha is set. You will need to fill in the alpha channel manually if you need an alpha channel.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">bmp</td><td>The bitmap to be converted to a texture. </td></tr>
<tr><td class="paramname">flags</td><td>The conversion flags. </td></tr>
<tr><td class="paramname">internal_format</td><td>The texture format to convert to.</td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>GLuint The texture handle, or 0 on failure </dd></dl>
<p>Definition at line <a class="el" href="texture_8c_source.html#l01165">1165</a> of file <a class="el" href="texture_8c_source.html">texture.c</a>.</p>
<p>References <a class="el" href="glext_8c_source.html#l00055">allegro_gl_extensions_GL</a>.</p>
<p>Referenced by <a class="el" href="texture_8c_source.html#l00495">allegro_gl_check_texture_ex()</a>, <a class="el" href="fontconv_8c_source.html#l00688">allegro_gl_convert_allegro_font_ex()</a>, <a class="el" href="texture_8c_source.html#l01402">allegro_gl_make_masked_texture()</a>, and <a class="el" href="texture_8c_source.html#l01383">allegro_gl_make_texture()</a>.</p>
</div>
</div>
</div>
</div>
<div id="nav-path" class="navpath">
<ul>
<li class="footer">Generated on Thu May 19 2011 23:20:20 for AllegroGL by 
<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.7.3 </li>
</ul>
</div>
</body>
</html>
|
