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Side by Side Diff: ppapi/api/ppb_var_array_buffer.idl

Issue 9405009: Updated documentation (added <code></code> and some other changes). (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src/
Patch Set: Created 8 years, 10 months ago
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1 /* Copyright (c) 2012 The Chromium Authors. All rights reserved. 1 /* Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 * Use of this source code is governed by a BSD-style license that can be 2 * Use of this source code is governed by a BSD-style license that can be
3 * found in the LICENSE file. 3 * found in the LICENSE file.
4 */ 4 */
5 5
6 /** 6 /**
7 * This file defines the <code>PPB_VarArrayBuffer</code> struct. 7 * This file defines the <code>PPB_VarArrayBuffer</code> struct providing.
dmichael (off chromium) 2012/02/15 17:59:35 nit: extra period.
jond 2012/02/16 21:23:51 Done.
8 * a way to interact with JavaScript ArrayBuffers.
8 */ 9 */
9 10
10 label Chrome { 11 label Chrome {
11 M18 = 1.0 12 M18 = 1.0
12 }; 13 };
13 14
14 /** 15 /**
15 * PPB_VarArrayBuffer API. This provides a way to interact with JavaScript 16 * The <code>PPB_VarArrayBuffer</code> interface provides a way to interact
16 * ArrayBuffers, which represent a contiguous sequence of bytes. To manage the 17 * with JavaScript ArrayBuffers, which represent a contiguous sequence of
17 * reference count for a VarArrayBuffer, please see PPB_Var. Note that 18 * bytes. Refer to <code>PPB_Var</code> to manage the reference count for a
dmichael (off chromium) 2012/02/15 17:59:35 Maybe "Use" instead of "Refer to"?
jond 2012/02/16 21:23:51 Done.
18 * these Vars are not part of the embedding page's DOM, and can only be shared 19 * <code>VarArrayBuffer</code>. Note that these Vars are not part of the
19 * with JavaScript via pp::Instance's PostMessage and HandleMessage functions. 20 * embedding page's DOM, and can only be shared with JavaScript using the
21 * <code>PostMessage</code> and <code>HandleMessage</code> functions of
22 * <code>pp::Instance</code>.
20 */ 23 */
21 [macro="PPB_VAR_ARRAY_BUFFER_INTERFACE"] 24 [macro="PPB_VAR_ARRAY_BUFFER_INTERFACE"]
22 interface PPB_VarArrayBuffer { 25 interface PPB_VarArrayBuffer {
23 /** 26 /**
24 * Create a zero-initialized VarArrayBuffer. 27 * Create() creates a zero-initialized <code>VarArrayBuffer</code>.
25 * 28 *
26 * @param[in] size_in_bytes The size of the ArrayBuffer that will be created. 29 * @param[in] size_in_bytes The size of the <code>ArrayBuffer</code> to
30 * be created.
27 * 31 *
28 * @return A PP_Var which represents a VarArrayBuffer of the requested size 32 * @return A <code>PP_Var</code> representing a <code>VarArrayBuffer</code>
29 * with a reference count of 1. 33 * of the requested size and with a reference count of 1.
30 */ 34 */
31 PP_Var Create([in] uint32_t size_in_bytes); 35 PP_Var Create([in] uint32_t size_in_bytes);
32 36
33 /** 37 /**
34 * Retrieves the length of the VarArrayBuffer in bytes. On success, 38 * ByteLength() retrieves the length of the <code>VarArrayBuffer</code> in
35 * byte_length is set to the length of the given ArrayBuffer var. On failure, 39 * bytes. On success, <code>byte_length</code> is set to the length of the
36 * byte_length is unchanged (this could happen, for instance, if the given 40 * given <code>ArrayBuffer</code> var. On failure, <code>byte_length</code>
37 * PP_Var is not of type PP_VARTYPE_ARRAY_BUFFER). Note that ByteLength() will 41 * is unchanged (this could happen, for instance, if the given
38 * successfully retrieve the the size of an ArrayBuffer even if the 42 * <code>PP_Var</code> is not of type <code>PP_VARTYPE_ARRAY_BUFFER</code>).
39 * ArrayBuffer is not currently mapped. 43 * Note that ByteLength() will successfully retrieve the the size of an
dmichael (off chromium) 2012/02/15 17:59:35 extra "the"
jond 2012/02/16 21:23:51 Done.
44 * <code>ArrayBuffer</code> even if the <code>ArrayBuffer</code> is not
45 * currently mapped.
40 * 46 *
41 * @param[in] array The ArrayBuffer whose length should be returned. 47 * @param[in] array The <code>ArrayBuffer</code> whose length should be
48 * returned.
42 * 49 *
43 * @param[out] byte_length A variable which is set to the length of the given 50 * @param[out] byte_length A variable which is set to the length of the given
44 * ArrayBuffer on success. 51 * <code>ArrayBuffer</code> on success.
45 * 52 *
46 * @return PP_TRUE on success, PP_FALSE on failure. 53 * @return <code>PP_TRUE</code> on success, <code>PP_FALSE</code> on failure.
47 */ 54 */
48 PP_Bool ByteLength([in] PP_Var array, [out] uint32_t byte_length); 55 PP_Bool ByteLength([in] PP_Var array, [out] uint32_t byte_length);
49 56
50 /** 57 /**
51 * Maps the ArrayBuffer in to the module's address space and returns a pointer 58 * Map() maps the <code>ArrayBuffer</code> in to the module's address space
52 * to the beginning of the buffer for the given ArrayBuffer PP_Var. Note that 59 * and returns a pointer to the beginning of the buffer for the given
53 * calling Map() can be a relatively expensive operation. Use care when 60 * <code>ArrayBuffer PP_Var</code>. Note that calling Map() can be a relativel y
dmichael (off chromium) 2012/02/15 17:59:35 >80 character line
54 * calling it in performance-critical code. For example, you should call it 61 * expensive operation. Use care when calling it in performance-critical code.
55 * only once when looping over an ArrayBuffer: 62 * For example, you should call it only once when looping over an
63 * <code>ArrayBuffer</code>.
56 * 64 *
57 * <code> 65 * <strong>Example:</strong>
66 *
67 * @code
dmichael (off chromium) 2012/02/15 17:59:35 <code>
jond 2012/02/16 21:23:51 Actually, I've been asked to go back to @code @end
58 * char* data = (char*)(array_buffer_if.Map(array_buffer_var)); 68 * char* data = (char*)(array_buffer_if.Map(array_buffer_var));
59 * uint32_t byte_length = 0; 69 * uint32_t byte_length = 0;
60 * PP_Bool ok = array_buffer_if.ByteLength(array_buffer_var, &byte_length); 70 * PP_Bool ok = array_buffer_if.ByteLength(array_buffer_var, &byte_length);
61 * if (!ok) 71 * if (!ok)
62 * return DoSomethingBecauseMyVarIsNotAnArrayBuffer(); 72 * return DoSomethingBecauseMyVarIsNotAnArrayBuffer();
63 * for (uint32_t i = 0; i < byte_length; ++i) 73 * for (uint32_t i = 0; i < byte_length; ++i)
64 * data[i] = 'A'; 74 * data[i] = 'A';
65 * </code> 75 * @endcode
dmichael (off chromium) 2012/02/15 17:59:35 </code>
jond 2012/02/16 21:23:51 Actually, I've been asked to go back to @code @end
dmichael (off chromium) 2012/02/16 22:43:21 Weird. I thought they worked the same. Okay.
66 * 76 *
67 * @param[in] array The ArrayBuffer whose internal buffer should be returned. 77 * @param[in] array The <code>ArrayBuffer</code> whose internal buffer should
78 * be returned.
68 * 79 *
69 * @return A pointer to the internal buffer for this ArrayBuffer. Returns NULL 80 * @return A pointer to the internal buffer for this
70 * if the given PP_Var is not of type PP_VARTYPE_ARRAY_BUFFER. 81 * <code>ArrayBuffer</code>. Returns <code>NULL</code>
82 * if the given <code>PP_Var</code> is not of type
83 * <code>PP_VARTYPE_ARRAY_BUFFER</code>.
71 */ 84 */
72 mem_t Map([in] PP_Var array); 85 mem_t Map([in] PP_Var array);
73 86
74 /** 87 /**
75 * Unmaps the given ArrayBuffer var from the module address space. Use this if 88 * Unmap() unmaps the given <code>ArrayBuffer</code> var from the module
76 * you want to save memory but might want to Map the buffer again later. The 89 * address space. Use this if you want to save memory but might want to call
77 * PP_Var remains valid and should still be released using PPB_Var when you 90 * Map() to map the buffer again later. The <code>PP_Var</code> remains valid
78 * are done with the ArrayBuffer. 91 * and should still be released using <code>PPB_Var</code> when you are done
92 * with the <code>ArrayBuffer</code>.
79 * 93 *
80 * @param[in] array The ArrayBuffer which should be released. 94 * @param[in] array The <code>ArrayBuffer</code> to be released.
81 */ 95 */
82 void Unmap([in] PP_Var array); 96 void Unmap([in] PP_Var array);
83 }; 97 };
84 98
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