1 /*
2 * Copyright (C) 2009 Apple Inc. All rights reserved.
3 * Copyright (C) 2009 Google Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include "config.h"
28
29 #if ENABLE(3D_CANVAS)
30
31 #include "WebGLArrayBuffer.h"
32 #include "WebGLUnsignedShortArray.h"
33
34 namespace WebCore {
35
create(unsigned length)36 PassRefPtr<WebGLUnsignedShortArray> WebGLUnsignedShortArray::create(unsigned length)
37 {
38 RefPtr<WebGLArrayBuffer> buffer = WebGLArrayBuffer::create(length * sizeof(unsigned short));
39 return create(buffer, 0, length);
40 }
41
create(unsigned short * array,unsigned length)42 PassRefPtr<WebGLUnsignedShortArray> WebGLUnsignedShortArray::create(unsigned short* array, unsigned length)
43 {
44 RefPtr<WebGLUnsignedShortArray> a = WebGLUnsignedShortArray::create(length);
45 for (unsigned i = 0; i < length; ++i)
46 a->set(i, array[i]);
47 return a;
48 }
49
create(PassRefPtr<WebGLArrayBuffer> buffer,int byteOffset,unsigned length)50 PassRefPtr<WebGLUnsignedShortArray> WebGLUnsignedShortArray::create(PassRefPtr<WebGLArrayBuffer> buffer,
51 int byteOffset,
52 unsigned length)
53 {
54 // Make sure the offset results in valid alignment.
55 if ((byteOffset % sizeof(unsigned short)) != 0) {
56 return NULL;
57 }
58
59 if (buffer) {
60 // Check to make sure we are talking about a valid region of
61 // the given WebGLArrayBuffer's storage.
62 if ((byteOffset + (length * sizeof(unsigned short))) > buffer->byteLength())
63 return NULL;
64 }
65
66 return adoptRef(new WebGLUnsignedShortArray(buffer, byteOffset, length));
67 }
68
WebGLUnsignedShortArray(PassRefPtr<WebGLArrayBuffer> buffer,int byteOffset,unsigned length)69 WebGLUnsignedShortArray::WebGLUnsignedShortArray(PassRefPtr<WebGLArrayBuffer> buffer,
70 int byteOffset,
71 unsigned length)
72 : WebGLArray(buffer, byteOffset)
73 , m_size(length)
74 {
75 }
76
length() const77 unsigned WebGLUnsignedShortArray::length() const {
78 return m_size;
79 }
80
byteLength() const81 unsigned WebGLUnsignedShortArray::byteLength() const {
82 return m_size * sizeof(unsigned short);
83 }
84
slice(unsigned offset,unsigned length)85 PassRefPtr<WebGLArray> WebGLUnsignedShortArray::slice(unsigned offset, unsigned length) {
86 // Check to make sure the specified region is within the bounds of
87 // the WebGLArrayBuffer.
88 unsigned startByte = m_byteOffset + offset * sizeof(unsigned short);
89 unsigned limitByte = startByte + length * sizeof(unsigned short);
90 unsigned bufferLength = buffer()->byteLength();
91 if (startByte >= bufferLength || limitByte > bufferLength)
92 return 0;
93 return create(buffer(), startByte, length);
94 }
95
set(WebGLUnsignedShortArray * array,unsigned offset,ExceptionCode & ec)96 void WebGLUnsignedShortArray::set(WebGLUnsignedShortArray* array, unsigned offset, ExceptionCode& ec) {
97 setImpl(array, offset * sizeof(unsigned short), ec);
98 }
99
100 }
101
102 #endif // ENABLE(3D_CANVAS)
103