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#include "core/html/canvas/WebGLUniformLocation.h"
30
31namespace blink {
32
33PassRefPtrWillBeRawPtr<WebGLUniformLocation> WebGLUniformLocation::create(WebGLProgram* program, GLint location)
34{
35    return adoptRefWillBeNoop(new WebGLUniformLocation(program, location));
36}
37
38WebGLUniformLocation::WebGLUniformLocation(WebGLProgram* program, GLint location)
39    : m_program(program)
40    , m_location(location)
41{
42    ASSERT(m_program);
43    m_linkCount = m_program->linkCount();
44}
45
46WebGLProgram* WebGLUniformLocation::program() const
47{
48    // If the program has been linked again, then this UniformLocation is no
49    // longer valid.
50    if (m_program->linkCount() != m_linkCount)
51        return 0;
52    return m_program.get();
53}
54
55GLint WebGLUniformLocation::location() const
56{
57    // If the program has been linked again, then this UniformLocation is no
58    // longer valid.
59    ASSERT(m_program->linkCount() == m_linkCount);
60    return m_location;
61}
62
63void WebGLUniformLocation::trace(Visitor* visitor)
64{
65    visitor->trace(m_program);
66}
67
68}
69