/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html is in libcogl-doc 1.22.2-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 | <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>CoglBuffer: The Buffer Interface: Cogl 2.0 Reference Manual</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
<link rel="home" href="index.html" title="Cogl 2.0 Reference Manual">
<link rel="up" href="cogl-buffer-apis.html" title="Allocating GPU Memory">
<link rel="prev" href="cogl-buffer-apis.html" title="Allocating GPU Memory">
<link rel="next" href="cogl-2.0-experimental-CoglAttributeBuffer---Buffers-of-vertex-attributes.html" title="CoglAttributeBuffer: Buffers of vertex attributes">
<meta name="generator" content="GTK-Doc V1.25 (XML mode)">
<link rel="stylesheet" href="style.css" type="text/css">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle">
<td width="100%" align="left" class="shortcuts">
<a href="#" class="shortcut">Top</a><span id="nav_description"> <span class="dim">|</span>
<a href="#cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.description" class="shortcut">Description</a></span>
</td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td>
<td><a accesskey="u" href="cogl-buffer-apis.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td>
<td><a accesskey="p" href="cogl-buffer-apis.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td>
<td><a accesskey="n" href="cogl-2.0-experimental-CoglAttributeBuffer---Buffers-of-vertex-attributes.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td>
</tr></table>
<div class="refentry">
<a name="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.top_of_page"></a>CoglBuffer: The Buffer Interface</span></h2>
<p>CoglBuffer: The Buffer Interface — Common buffer functions, including data upload APIs</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.stability-level"></a><h2>Stability Level</h2>
<acronym title="Unstable interfaces are experimental or transitional. They are typically used to
give outside developers early access to new or rapidly changing technology, or
to provide an interim solution to a problem where a more general solution is
anticipated. No claims are made about either source or binary compatibility from
one minor release to the next.
The Unstable interface level is a warning that these interfaces are subject to
change without warning and should not be used in unbundled products.
Given such caveats, customer impact need not be a factor when considering
incompatible changes to an Unstable interface in a major or minor release.
Nonetheless, when such changes are introduced, the changes should still be
mentioned in the release notes for the affected release.
"><span class="acronym">Unstable</span></acronym>, unless otherwise indicated
</div>
<div class="refsect1">
<a name="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglBool" title="CoglBool"><span class="returnvalue">CoglBool</span></a>
</td>
<td class="function_name">
<a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#cogl-is-buffer" title="cogl_is_buffer ()">cogl_is_buffer</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">unsigned <span class="returnvalue">int</span>
</td>
<td class="function_name">
<a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#cogl-buffer-get-size" title="cogl_buffer_get_size ()">cogl_buffer_get_size</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#cogl-buffer-set-update-hint" title="cogl_buffer_set_update_hint ()">cogl_buffer_set_update_hint</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#CoglBufferUpdateHint" title="enum CoglBufferUpdateHint"><span class="returnvalue">CoglBufferUpdateHint</span></a>
</td>
<td class="function_name">
<a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#cogl-buffer-get-update-hint" title="cogl_buffer_get_update_hint ()">cogl_buffer_get_update_hint</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span> *
</td>
<td class="function_name">
<a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#cogl-buffer-map" title="cogl_buffer_map ()">cogl_buffer_map</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span> *
</td>
<td class="function_name">
<a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#cogl-buffer-map-range" title="cogl_buffer_map_range ()">cogl_buffer_map_range</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#cogl-buffer-unmap" title="cogl_buffer_unmap ()">cogl_buffer_unmap</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglBool" title="CoglBool"><span class="returnvalue">CoglBool</span></a>
</td>
<td class="function_name">
<a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#cogl-buffer-set-data" title="cogl_buffer_set_data ()">cogl_buffer_set_data</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#CoglPixelBuffer" title="CoglPixelBuffer"><span class="returnvalue">CoglPixelBuffer</span></a> *
</td>
<td class="function_name">
<a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#cogl-pixel-buffer-new" title="cogl_pixel_buffer_new ()">cogl_pixel_buffer_new</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglBool" title="CoglBool"><span class="returnvalue">CoglBool</span></a>
</td>
<td class="function_name">
<a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#cogl-is-pixel-buffer" title="cogl_is_pixel_buffer ()">cogl_is_pixel_buffer</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody>
<tr>
<td class="typedef_keyword">typedef</td>
<td class="function_name"><a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#CoglBuffer" title="CoglBuffer">CoglBuffer</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#CoglBufferUpdateHint" title="enum CoglBufferUpdateHint">CoglBufferUpdateHint</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#CoglBufferAccess" title="enum CoglBufferAccess">CoglBufferAccess</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#CoglBufferMapHint" title="enum CoglBufferMapHint">CoglBufferMapHint</a></td>
</tr>
<tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#CoglPixelBuffer" title="CoglPixelBuffer">CoglPixelBuffer</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.description"></a><h2>Description</h2>
<p>The CoglBuffer API provides a common interface to manipulate
buffers that have been allocated either via <a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#cogl-pixel-buffer-new" title="cogl_pixel_buffer_new ()"><code class="function">cogl_pixel_buffer_new()</code></a>
or <a class="link" href="cogl-2.0-experimental-CoglAttributeBuffer---Buffers-of-vertex-attributes.html#cogl-attribute-buffer-new" title="cogl_attribute_buffer_new ()"><code class="function">cogl_attribute_buffer_new()</code></a>. The API allows you to upload data
to these buffers and define usage hints that help Cogl manage your
buffer optimally.</p>
<p>Data can either be uploaded by supplying a pointer and size so Cogl
can copy your data, or you can <code class="function">mmap()</code> a CoglBuffer and then you can
copy data to the buffer directly.</p>
<p>One of the most common uses for CoglBuffers is to upload texture
data asynchronously since the ability to mmap the buffers into
the CPU makes it possible for another thread to handle the IO
of loading an image file and unpacking it into the mapped buffer
without blocking other Cogl operations.</p>
</div>
<div class="refsect1">
<a name="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="cogl-is-buffer"></a><h3>cogl_is_buffer ()</h3>
<pre class="programlisting"><a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglBool" title="CoglBool"><span class="returnvalue">CoglBool</span></a>
cogl_is_buffer (<em class="parameter"><code><span class="type">void</span> *object</code></em>);</pre>
<p>Checks whether <em class="parameter"><code>buffer</code></em>
is a buffer object.</p>
<div class="refsect3">
<a name="cogl-is-buffer.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>object</p></td>
<td class="parameter_description"><p>a buffer object</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="cogl-is-buffer.returns"></a><h4>Returns</h4>
<p> <code class="literal">TRUE</code> if the handle is a CoglBuffer, and <code class="literal">FALSE</code> otherwise</p>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.2">1.2</a></p>
<p class="stability">Stability Level: <acronym title="Unstable interfaces are experimental or transitional. They are typically used to
give outside developers early access to new or rapidly changing technology, or
to provide an interim solution to a problem where a more general solution is
anticipated. No claims are made about either source or binary compatibility from
one minor release to the next.
The Unstable interface level is a warning that these interfaces are subject to
change without warning and should not be used in unbundled products.
Given such caveats, customer impact need not be a factor when considering
incompatible changes to an Unstable interface in a major or minor release.
Nonetheless, when such changes are introduced, the changes should still be
mentioned in the release notes for the affected release.
"><span class="acronym">Unstable</span></acronym></p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-buffer-get-size"></a><h3>cogl_buffer_get_size ()</h3>
<pre class="programlisting">unsigned <span class="returnvalue">int</span>
cogl_buffer_get_size (<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#CoglBuffer" title="CoglBuffer"><span class="type">CoglBuffer</span></a> *buffer</code></em>);</pre>
<p>Retrieves the size of buffer</p>
<div class="refsect3">
<a name="cogl-buffer-get-size.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>buffer</p></td>
<td class="parameter_description"><p>a buffer object</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="cogl-buffer-get-size.returns"></a><h4>Returns</h4>
<p> the size of the buffer in bytes</p>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.2">1.2</a></p>
<p class="stability">Stability Level: <acronym title="Unstable interfaces are experimental or transitional. They are typically used to
give outside developers early access to new or rapidly changing technology, or
to provide an interim solution to a problem where a more general solution is
anticipated. No claims are made about either source or binary compatibility from
one minor release to the next.
The Unstable interface level is a warning that these interfaces are subject to
change without warning and should not be used in unbundled products.
Given such caveats, customer impact need not be a factor when considering
incompatible changes to an Unstable interface in a major or minor release.
Nonetheless, when such changes are introduced, the changes should still be
mentioned in the release notes for the affected release.
"><span class="acronym">Unstable</span></acronym></p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-buffer-set-update-hint"></a><h3>cogl_buffer_set_update_hint ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
cogl_buffer_set_update_hint (<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#CoglBuffer" title="CoglBuffer"><span class="type">CoglBuffer</span></a> *buffer</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#CoglBufferUpdateHint" title="enum CoglBufferUpdateHint"><span class="type">CoglBufferUpdateHint</span></a> hint</code></em>);</pre>
<p>Sets the update hint on a buffer. See <a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#CoglBufferUpdateHint" title="enum CoglBufferUpdateHint"><span class="type">CoglBufferUpdateHint</span></a> for a description
of the available hints.</p>
<div class="refsect3">
<a name="cogl-buffer-set-update-hint.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>buffer</p></td>
<td class="parameter_description"><p>a buffer object</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>hint</p></td>
<td class="parameter_description"><p>the new hint</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.2">1.2</a></p>
<p class="stability">Stability Level: <acronym title="Unstable interfaces are experimental or transitional. They are typically used to
give outside developers early access to new or rapidly changing technology, or
to provide an interim solution to a problem where a more general solution is
anticipated. No claims are made about either source or binary compatibility from
one minor release to the next.
The Unstable interface level is a warning that these interfaces are subject to
change without warning and should not be used in unbundled products.
Given such caveats, customer impact need not be a factor when considering
incompatible changes to an Unstable interface in a major or minor release.
Nonetheless, when such changes are introduced, the changes should still be
mentioned in the release notes for the affected release.
"><span class="acronym">Unstable</span></acronym></p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-buffer-get-update-hint"></a><h3>cogl_buffer_get_update_hint ()</h3>
<pre class="programlisting"><a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#CoglBufferUpdateHint" title="enum CoglBufferUpdateHint"><span class="returnvalue">CoglBufferUpdateHint</span></a>
cogl_buffer_get_update_hint (<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#CoglBuffer" title="CoglBuffer"><span class="type">CoglBuffer</span></a> *buffer</code></em>);</pre>
<p>Retrieves the update hints set using <a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#cogl-buffer-set-update-hint" title="cogl_buffer_set_update_hint ()"><code class="function">cogl_buffer_set_update_hint()</code></a></p>
<div class="refsect3">
<a name="cogl-buffer-get-update-hint.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>buffer</p></td>
<td class="parameter_description"><p>a buffer object</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="cogl-buffer-get-update-hint.returns"></a><h4>Returns</h4>
<p> the <a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#CoglBufferUpdateHint" title="enum CoglBufferUpdateHint"><span class="type">CoglBufferUpdateHint</span></a> currently used by the buffer</p>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.2">1.2</a></p>
<p class="stability">Stability Level: <acronym title="Unstable interfaces are experimental or transitional. They are typically used to
give outside developers early access to new or rapidly changing technology, or
to provide an interim solution to a problem where a more general solution is
anticipated. No claims are made about either source or binary compatibility from
one minor release to the next.
The Unstable interface level is a warning that these interfaces are subject to
change without warning and should not be used in unbundled products.
Given such caveats, customer impact need not be a factor when considering
incompatible changes to an Unstable interface in a major or minor release.
Nonetheless, when such changes are introduced, the changes should still be
mentioned in the release notes for the affected release.
"><span class="acronym">Unstable</span></acronym></p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-buffer-map"></a><h3>cogl_buffer_map ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> *
cogl_buffer_map (<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#CoglBuffer" title="CoglBuffer"><span class="type">CoglBuffer</span></a> *buffer</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#CoglBufferAccess" title="enum CoglBufferAccess"><span class="type">CoglBufferAccess</span></a> access</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#CoglBufferMapHint" title="enum CoglBufferMapHint"><span class="type">CoglBufferMapHint</span></a> hints</code></em>);</pre>
<p>Maps the buffer into the application address space for direct
access. This is equivalent to calling <a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#cogl-buffer-map-range" title="cogl_buffer_map_range ()"><code class="function">cogl_buffer_map_range()</code></a> with
zero as the offset and the size of the entire buffer as the size.</p>
<p>It is strongly recommended that you pass
<a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#COGL-BUFFER-MAP-HINT-DISCARD:CAPS"><code class="literal">COGL_BUFFER_MAP_HINT_DISCARD</code></a> as a hint if you are going to replace
all the buffer's data. This way if the buffer is currently being
used by the GPU then the driver won't have to stall the CPU and
wait for the hardware to finish because it can instead allocate a
new buffer to map.</p>
<p>The behaviour is undefined if you access the buffer in a way
conflicting with the <em class="parameter"><code>access</code></em>
mask you pass. It is also an error to
release your last reference while the buffer is mapped.</p>
<div class="refsect3">
<a name="cogl-buffer-map.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>buffer</p></td>
<td class="parameter_description"><p>a buffer object</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>access</p></td>
<td class="parameter_description"><p>how the mapped buffer will be used by the application</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>hints</p></td>
<td class="parameter_description"><p>A mask of <a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#CoglBufferMapHint" title="enum CoglBufferMapHint"><span class="type">CoglBufferMapHint</span></a>s that tell Cogl how
the data will be modified once mapped.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="cogl-buffer-map.returns"></a><h4>Returns</h4>
<p> A pointer to the mapped memory or
<code class="literal">NULL</code> is the call fails. </p>
<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.2">1.2</a></p>
<p class="stability">Stability Level: <acronym title="Unstable interfaces are experimental or transitional. They are typically used to
give outside developers early access to new or rapidly changing technology, or
to provide an interim solution to a problem where a more general solution is
anticipated. No claims are made about either source or binary compatibility from
one minor release to the next.
The Unstable interface level is a warning that these interfaces are subject to
change without warning and should not be used in unbundled products.
Given such caveats, customer impact need not be a factor when considering
incompatible changes to an Unstable interface in a major or minor release.
Nonetheless, when such changes are introduced, the changes should still be
mentioned in the release notes for the affected release.
"><span class="acronym">Unstable</span></acronym></p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-buffer-map-range"></a><h3>cogl_buffer_map_range ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> *
cogl_buffer_map_range (<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#CoglBuffer" title="CoglBuffer"><span class="type">CoglBuffer</span></a> *buffer</code></em>,
<em class="parameter"><code><span class="type">size_t</span> offset</code></em>,
<em class="parameter"><code><span class="type">size_t</span> size</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#CoglBufferAccess" title="enum CoglBufferAccess"><span class="type">CoglBufferAccess</span></a> access</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#CoglBufferMapHint" title="enum CoglBufferMapHint"><span class="type">CoglBufferMapHint</span></a> hints</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Exception-handling.html#CoglError" title="CoglError"><span class="type">CoglError</span></a> **error</code></em>);</pre>
<p>Maps a sub-region of the buffer into the application's address space
for direct access.</p>
<p>It is strongly recommended that you pass
<a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#COGL-BUFFER-MAP-HINT-DISCARD:CAPS"><code class="literal">COGL_BUFFER_MAP_HINT_DISCARD</code></a> as a hint if you are going to replace
all the buffer's data. This way if the buffer is currently being
used by the GPU then the driver won't have to stall the CPU and
wait for the hardware to finish because it can instead allocate a
new buffer to map. You can pass
<a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#COGL-BUFFER-MAP-HINT-DISCARD-RANGE:CAPS"><code class="literal">COGL_BUFFER_MAP_HINT_DISCARD_RANGE</code></a> instead if you want the
regions outside of the mapping to be retained.</p>
<p>The behaviour is undefined if you access the buffer in a way
conflicting with the <em class="parameter"><code>access</code></em>
mask you pass. It is also an error to
release your last reference while the buffer is mapped.</p>
<div class="refsect3">
<a name="cogl-buffer-map-range.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>buffer</p></td>
<td class="parameter_description"><p>a buffer object</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>offset</p></td>
<td class="parameter_description"><p>Offset within the buffer to start the mapping</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>size</p></td>
<td class="parameter_description"><p>The size of data to map</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>access</p></td>
<td class="parameter_description"><p>how the mapped buffer will be used by the application</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>hints</p></td>
<td class="parameter_description"><p>A mask of <a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#CoglBufferMapHint" title="enum CoglBufferMapHint"><span class="type">CoglBufferMapHint</span></a>s that tell Cogl how
the data will be modified once mapped.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>A <a class="link" href="cogl-2.0-experimental-Exception-handling.html#CoglError" title="CoglError"><span class="type">CoglError</span></a> for catching exceptional errors</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="cogl-buffer-map-range.returns"></a><h4>Returns</h4>
<p> A pointer to the mapped memory or
<code class="literal">NULL</code> is the call fails. </p>
<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>
</div>
<p class="since">Since: 2.0</p>
<p class="stability">Stability Level: <acronym title="Unstable interfaces are experimental or transitional. They are typically used to
give outside developers early access to new or rapidly changing technology, or
to provide an interim solution to a problem where a more general solution is
anticipated. No claims are made about either source or binary compatibility from
one minor release to the next.
The Unstable interface level is a warning that these interfaces are subject to
change without warning and should not be used in unbundled products.
Given such caveats, customer impact need not be a factor when considering
incompatible changes to an Unstable interface in a major or minor release.
Nonetheless, when such changes are introduced, the changes should still be
mentioned in the release notes for the affected release.
"><span class="acronym">Unstable</span></acronym></p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-buffer-unmap"></a><h3>cogl_buffer_unmap ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
cogl_buffer_unmap (<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#CoglBuffer" title="CoglBuffer"><span class="type">CoglBuffer</span></a> *buffer</code></em>);</pre>
<p>Unmaps a buffer previously mapped by <a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#cogl-buffer-map" title="cogl_buffer_map ()"><code class="function">cogl_buffer_map()</code></a>.</p>
<div class="refsect3">
<a name="cogl-buffer-unmap.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>buffer</p></td>
<td class="parameter_description"><p>a buffer object</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.2">1.2</a></p>
<p class="stability">Stability Level: <acronym title="Unstable interfaces are experimental or transitional. They are typically used to
give outside developers early access to new or rapidly changing technology, or
to provide an interim solution to a problem where a more general solution is
anticipated. No claims are made about either source or binary compatibility from
one minor release to the next.
The Unstable interface level is a warning that these interfaces are subject to
change without warning and should not be used in unbundled products.
Given such caveats, customer impact need not be a factor when considering
incompatible changes to an Unstable interface in a major or minor release.
Nonetheless, when such changes are introduced, the changes should still be
mentioned in the release notes for the affected release.
"><span class="acronym">Unstable</span></acronym></p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-buffer-set-data"></a><h3>cogl_buffer_set_data ()</h3>
<pre class="programlisting"><a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglBool" title="CoglBool"><span class="returnvalue">CoglBool</span></a>
cogl_buffer_set_data (<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#CoglBuffer" title="CoglBuffer"><span class="type">CoglBuffer</span></a> *buffer</code></em>,
<em class="parameter"><code><span class="type">size_t</span> offset</code></em>,
<em class="parameter"><code>const <span class="type">void</span> *data</code></em>,
<em class="parameter"><code><span class="type">size_t</span> size</code></em>);</pre>
<p>Updates part of the buffer with new data from <em class="parameter"><code>data</code></em>
. Where to put this new
data is controlled by <em class="parameter"><code>offset</code></em>
and <em class="parameter"><code>offset</code></em>
+ <em class="parameter"><code>data</code></em>
should be less than the
buffer size.</p>
<div class="refsect3">
<a name="cogl-buffer-set-data.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>buffer</p></td>
<td class="parameter_description"><p>a buffer object</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>offset</p></td>
<td class="parameter_description"><p>destination offset (in bytes) in the buffer</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>data</p></td>
<td class="parameter_description"><p>a pointer to the data to be copied into the buffer</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>size</p></td>
<td class="parameter_description"><p>number of bytes to copy</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="cogl-buffer-set-data.returns"></a><h4>Returns</h4>
<p> <code class="literal">TRUE</code> is the operation succeeded, <code class="literal">FALSE</code> otherwise</p>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.2">1.2</a></p>
<p class="stability">Stability Level: <acronym title="Unstable interfaces are experimental or transitional. They are typically used to
give outside developers early access to new or rapidly changing technology, or
to provide an interim solution to a problem where a more general solution is
anticipated. No claims are made about either source or binary compatibility from
one minor release to the next.
The Unstable interface level is a warning that these interfaces are subject to
change without warning and should not be used in unbundled products.
Given such caveats, customer impact need not be a factor when considering
incompatible changes to an Unstable interface in a major or minor release.
Nonetheless, when such changes are introduced, the changes should still be
mentioned in the release notes for the affected release.
"><span class="acronym">Unstable</span></acronym></p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-pixel-buffer-new"></a><h3>cogl_pixel_buffer_new ()</h3>
<pre class="programlisting"><a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#CoglPixelBuffer" title="CoglPixelBuffer"><span class="returnvalue">CoglPixelBuffer</span></a> *
cogl_pixel_buffer_new (<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-The-Top-Level-Context.html#CoglContext" title="CoglContext"><span class="type">CoglContext</span></a> *context</code></em>,
<em class="parameter"><code><span class="type">size_t</span> size</code></em>,
<em class="parameter"><code>const <span class="type">void</span> *data</code></em>);</pre>
<p>Declares a new <a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#CoglPixelBuffer" title="CoglPixelBuffer"><span class="type">CoglPixelBuffer</span></a> of <em class="parameter"><code>size</code></em>
bytes to contain arrays of
pixels. Once declared, data can be set using <a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#cogl-buffer-set-data" title="cogl_buffer_set_data ()"><code class="function">cogl_buffer_set_data()</code></a>
or by mapping it into the application's address space using
<a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#cogl-buffer-map" title="cogl_buffer_map ()"><code class="function">cogl_buffer_map()</code></a>.</p>
<p>If <em class="parameter"><code>data</code></em>
isn't <code class="literal">NULL</code> then <em class="parameter"><code>size</code></em>
bytes will be read from <em class="parameter"><code>data</code></em>
and
immediately copied into the new buffer.</p>
<div class="refsect3">
<a name="cogl-pixel-buffer-new.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>context</p></td>
<td class="parameter_description"><p>A <a class="link" href="cogl-2.0-experimental-The-Top-Level-Context.html#CoglContext" title="CoglContext"><span class="type">CoglContext</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>size</p></td>
<td class="parameter_description"><p>The number of bytes to allocate for the pixel data.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>data</p></td>
<td class="parameter_description"><p>An optional pointer to vertex data to upload immediately</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="cogl-pixel-buffer-new.returns"></a><h4>Returns</h4>
<p> a newly allocated <a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#CoglPixelBuffer" title="CoglPixelBuffer"><span class="type">CoglPixelBuffer</span></a>. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
<p class="since">Since: 1.10</p>
<p class="stability">Stability Level: <acronym title="Unstable interfaces are experimental or transitional. They are typically used to
give outside developers early access to new or rapidly changing technology, or
to provide an interim solution to a problem where a more general solution is
anticipated. No claims are made about either source or binary compatibility from
one minor release to the next.
The Unstable interface level is a warning that these interfaces are subject to
change without warning and should not be used in unbundled products.
Given such caveats, customer impact need not be a factor when considering
incompatible changes to an Unstable interface in a major or minor release.
Nonetheless, when such changes are introduced, the changes should still be
mentioned in the release notes for the affected release.
"><span class="acronym">Unstable</span></acronym></p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-is-pixel-buffer"></a><h3>cogl_is_pixel_buffer ()</h3>
<pre class="programlisting"><a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglBool" title="CoglBool"><span class="returnvalue">CoglBool</span></a>
cogl_is_pixel_buffer (<em class="parameter"><code><span class="type">void</span> *object</code></em>);</pre>
<p>Checks whether <em class="parameter"><code>object</code></em>
is a pixel buffer.</p>
<div class="refsect3">
<a name="cogl-is-pixel-buffer.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>object</p></td>
<td class="parameter_description"><p>a <a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#CoglObject" title="CoglObject"><span class="type">CoglObject</span></a> to test</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="cogl-is-pixel-buffer.returns"></a><h4>Returns</h4>
<p> <code class="literal">TRUE</code> if the <em class="parameter"><code>object</code></em>
is a pixel buffer, and <code class="literal">FALSE</code>
otherwise</p>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.2">1.2</a></p>
<p class="stability">Stability Level: <acronym title="Unstable interfaces are experimental or transitional. They are typically used to
give outside developers early access to new or rapidly changing technology, or
to provide an interim solution to a problem where a more general solution is
anticipated. No claims are made about either source or binary compatibility from
one minor release to the next.
The Unstable interface level is a warning that these interfaces are subject to
change without warning and should not be used in unbundled products.
Given such caveats, customer impact need not be a factor when considering
incompatible changes to an Unstable interface in a major or minor release.
Nonetheless, when such changes are introduced, the changes should still be
mentioned in the release notes for the affected release.
"><span class="acronym">Unstable</span></acronym></p>
</div>
</div>
<div class="refsect1">
<a name="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="CoglBuffer"></a><h3>CoglBuffer</h3>
<pre class="programlisting">typedef void CoglBuffer;
</pre>
</div>
<hr>
<div class="refsect2">
<a name="CoglBufferUpdateHint"></a><h3>enum CoglBufferUpdateHint</h3>
<p>The update hint on a buffer allows the user to give some detail on how often
the buffer data is going to be updated.</p>
<div class="refsect3">
<a name="CoglBufferUpdateHint.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="COGL-BUFFER-UPDATE-HINT-STATIC:CAPS"></a>COGL_BUFFER_UPDATE_HINT_STATIC</p></td>
<td class="enum_member_description">
<p>the buffer will not change over time</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="COGL-BUFFER-UPDATE-HINT-DYNAMIC:CAPS"></a>COGL_BUFFER_UPDATE_HINT_DYNAMIC</p></td>
<td class="enum_member_description">
<p>the buffer will change from time to time</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="COGL-BUFFER-UPDATE-HINT-STREAM:CAPS"></a>COGL_BUFFER_UPDATE_HINT_STREAM</p></td>
<td class="enum_member_description">
<p>the buffer will be used once or a couple of
times</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.2">1.2</a></p>
<p class="stability">Stability Level: <acronym title="Unstable interfaces are experimental or transitional. They are typically used to
give outside developers early access to new or rapidly changing technology, or
to provide an interim solution to a problem where a more general solution is
anticipated. No claims are made about either source or binary compatibility from
one minor release to the next.
The Unstable interface level is a warning that these interfaces are subject to
change without warning and should not be used in unbundled products.
Given such caveats, customer impact need not be a factor when considering
incompatible changes to an Unstable interface in a major or minor release.
Nonetheless, when such changes are introduced, the changes should still be
mentioned in the release notes for the affected release.
"><span class="acronym">Unstable</span></acronym></p>
</div>
<hr>
<div class="refsect2">
<a name="CoglBufferAccess"></a><h3>enum CoglBufferAccess</h3>
<p>The access hints for <a class="link" href="cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html#cogl-buffer-set-update-hint" title="cogl_buffer_set_update_hint ()"><code class="function">cogl_buffer_set_update_hint()</code></a></p>
<div class="refsect3">
<a name="CoglBufferAccess.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="COGL-BUFFER-ACCESS-READ:CAPS"></a>COGL_BUFFER_ACCESS_READ</p></td>
<td class="enum_member_description">
<p>the buffer will be read</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="COGL-BUFFER-ACCESS-WRITE:CAPS"></a>COGL_BUFFER_ACCESS_WRITE</p></td>
<td class="enum_member_description">
<p>the buffer will written to</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="COGL-BUFFER-ACCESS-READ-WRITE:CAPS"></a>COGL_BUFFER_ACCESS_READ_WRITE</p></td>
<td class="enum_member_description">
<p>the buffer will be used for both reading and
writing</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.2">1.2</a></p>
<p class="stability">Stability Level: <acronym title="Unstable interfaces are experimental or transitional. They are typically used to
give outside developers early access to new or rapidly changing technology, or
to provide an interim solution to a problem where a more general solution is
anticipated. No claims are made about either source or binary compatibility from
one minor release to the next.
The Unstable interface level is a warning that these interfaces are subject to
change without warning and should not be used in unbundled products.
Given such caveats, customer impact need not be a factor when considering
incompatible changes to an Unstable interface in a major or minor release.
Nonetheless, when such changes are introduced, the changes should still be
mentioned in the release notes for the affected release.
"><span class="acronym">Unstable</span></acronym></p>
</div>
<hr>
<div class="refsect2">
<a name="CoglBufferMapHint"></a><h3>enum CoglBufferMapHint</h3>
<p>Hints to Cogl about how you are planning to modify the data once it
is mapped.</p>
<div class="refsect3">
<a name="CoglBufferMapHint.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="COGL-BUFFER-MAP-HINT-DISCARD:CAPS"></a>COGL_BUFFER_MAP_HINT_DISCARD</p></td>
<td class="enum_member_description">
<p>Tells Cogl that you plan to replace
all the buffer's contents. When this flag is used to map a
buffer, the entire contents of the buffer become undefined, even
if only a subregion of the buffer is mapped.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="COGL-BUFFER-MAP-HINT-DISCARD-RANGE:CAPS"></a>COGL_BUFFER_MAP_HINT_DISCARD_RANGE</p></td>
<td class="enum_member_description">
<p>Tells Cogl that you plan to
replace all the contents of the mapped region. The contents of
the region specified are undefined after this flag is used to
map a buffer.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix06.html#api-index-1.4">1.4</a></p>
<p class="stability">Stability Level: <acronym title="Unstable interfaces are experimental or transitional. They are typically used to
give outside developers early access to new or rapidly changing technology, or
to provide an interim solution to a problem where a more general solution is
anticipated. No claims are made about either source or binary compatibility from
one minor release to the next.
The Unstable interface level is a warning that these interfaces are subject to
change without warning and should not be used in unbundled products.
Given such caveats, customer impact need not be a factor when considering
incompatible changes to an Unstable interface in a major or minor release.
Nonetheless, when such changes are introduced, the changes should still be
mentioned in the release notes for the affected release.
"><span class="acronym">Unstable</span></acronym></p>
</div>
<hr>
<div class="refsect2">
<a name="CoglPixelBuffer"></a><h3>CoglPixelBuffer</h3>
<pre class="programlisting">typedef struct _CoglPixelBuffer CoglPixelBuffer;</pre>
</div>
</div>
</div>
<div class="footer">
<hr>Generated by GTK-Doc V1.25</div>
</body>
</html>
|