1/*
2 * Copyright (C) 2011 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27
28#include "core/html/canvas/OESVertexArrayObject.h"
29
30#include "bindings/core/v8/ExceptionState.h"
31#include "core/html/canvas/WebGLRenderingContextBase.h"
32#include "core/html/canvas/WebGLVertexArrayObjectOES.h"
33
34namespace blink {
35
36OESVertexArrayObject::OESVertexArrayObject(WebGLRenderingContextBase* context)
37    : WebGLExtension(context)
38{
39    context->extensionsUtil()->ensureExtensionEnabled("GL_OES_vertex_array_object");
40}
41
42OESVertexArrayObject::~OESVertexArrayObject()
43{
44}
45
46WebGLExtensionName OESVertexArrayObject::name() const
47{
48    return OESVertexArrayObjectName;
49}
50
51PassRefPtrWillBeRawPtr<OESVertexArrayObject> OESVertexArrayObject::create(WebGLRenderingContextBase* context)
52{
53    return adoptRefWillBeNoop(new OESVertexArrayObject(context));
54}
55
56PassRefPtrWillBeRawPtr<WebGLVertexArrayObjectOES> OESVertexArrayObject::createVertexArrayOES()
57{
58    if (isLost())
59        return nullptr;
60
61    RefPtrWillBeRawPtr<WebGLVertexArrayObjectOES> o = WebGLVertexArrayObjectOES::create(m_context, WebGLVertexArrayObjectOES::VaoTypeUser);
62    m_context->addContextObject(o.get());
63    return o.release();
64}
65
66void OESVertexArrayObject::deleteVertexArrayOES(WebGLVertexArrayObjectOES* arrayObject)
67{
68    if (!arrayObject || isLost())
69        return;
70
71    if (!arrayObject->isDefaultObject() && arrayObject == m_context->m_boundVertexArrayObject)
72        m_context->setBoundVertexArrayObject(nullptr);
73
74    arrayObject->deleteObject(m_context->webContext());
75}
76
77GLboolean OESVertexArrayObject::isVertexArrayOES(WebGLVertexArrayObjectOES* arrayObject)
78{
79    if (!arrayObject || isLost())
80        return 0;
81
82    if (!arrayObject->hasEverBeenBound())
83        return 0;
84
85    return m_context->webContext()->isVertexArrayOES(arrayObject->object());
86}
87
88void OESVertexArrayObject::bindVertexArrayOES(WebGLVertexArrayObjectOES* arrayObject)
89{
90    if (isLost())
91        return;
92
93    if (arrayObject && (arrayObject->isDeleted() || !arrayObject->validate(0, context()))) {
94        m_context->webContext()->synthesizeGLError(GL_INVALID_OPERATION);
95        return;
96    }
97
98    if (arrayObject && !arrayObject->isDefaultObject() && arrayObject->object()) {
99        m_context->webContext()->bindVertexArrayOES(arrayObject->object());
100
101        arrayObject->setHasEverBeenBound();
102        m_context->setBoundVertexArrayObject(arrayObject);
103    } else {
104        m_context->webContext()->bindVertexArrayOES(0);
105        m_context->setBoundVertexArrayObject(nullptr);
106    }
107}
108
109bool OESVertexArrayObject::supported(WebGLRenderingContextBase* context)
110{
111    return context->extensionsUtil()->supportsExtension("GL_OES_vertex_array_object");
112}
113
114const char* OESVertexArrayObject::extensionName()
115{
116    return "OES_vertex_array_object";
117}
118
119} // namespace blink
120