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      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/v8/ExceptionState.h"
     31 #include "core/html/canvas/WebGLRenderingContextBase.h"
     32 #include "core/html/canvas/WebGLVertexArrayObjectOES.h"
     33 
     34 namespace WebCore {
     35 
     36 OESVertexArrayObject::OESVertexArrayObject(WebGLRenderingContextBase* context)
     37     : WebGLExtension(context)
     38 {
     39     ScriptWrappable::init(this);
     40     context->extensionsUtil()->ensureExtensionEnabled("GL_OES_vertex_array_object");
     41 }
     42 
     43 OESVertexArrayObject::~OESVertexArrayObject()
     44 {
     45 }
     46 
     47 WebGLExtensionName OESVertexArrayObject::name() const
     48 {
     49     return OESVertexArrayObjectName;
     50 }
     51 
     52 PassRefPtr<OESVertexArrayObject> OESVertexArrayObject::create(WebGLRenderingContextBase* context)
     53 {
     54     return adoptRef(new OESVertexArrayObject(context));
     55 }
     56 
     57 PassRefPtr<WebGLVertexArrayObjectOES> OESVertexArrayObject::createVertexArrayOES()
     58 {
     59     if (isLost())
     60         return nullptr;
     61 
     62     RefPtr<WebGLVertexArrayObjectOES> o = WebGLVertexArrayObjectOES::create(m_context, WebGLVertexArrayObjectOES::VaoTypeUser);
     63     m_context->addContextObject(o.get());
     64     return o.release();
     65 }
     66 
     67 void OESVertexArrayObject::deleteVertexArrayOES(WebGLVertexArrayObjectOES* arrayObject)
     68 {
     69     if (!arrayObject || isLost())
     70         return;
     71 
     72     if (!arrayObject->isDefaultObject() && arrayObject == m_context->m_boundVertexArrayObject)
     73         m_context->setBoundVertexArrayObject(nullptr);
     74 
     75     arrayObject->deleteObject(m_context->webContext());
     76 }
     77 
     78 GLboolean OESVertexArrayObject::isVertexArrayOES(WebGLVertexArrayObjectOES* arrayObject)
     79 {
     80     if (!arrayObject || isLost())
     81         return 0;
     82 
     83     if (!arrayObject->hasEverBeenBound())
     84         return 0;
     85 
     86     return m_context->webContext()->isVertexArrayOES(arrayObject->object());
     87 }
     88 
     89 void OESVertexArrayObject::bindVertexArrayOES(WebGLVertexArrayObjectOES* arrayObject)
     90 {
     91     if (isLost())
     92         return;
     93 
     94     if (arrayObject && (arrayObject->isDeleted() || !arrayObject->validate(0, context()))) {
     95         m_context->webContext()->synthesizeGLError(GL_INVALID_OPERATION);
     96         return;
     97     }
     98 
     99     if (arrayObject && !arrayObject->isDefaultObject() && arrayObject->object()) {
    100         m_context->webContext()->bindVertexArrayOES(arrayObject->object());
    101 
    102         arrayObject->setHasEverBeenBound();
    103         m_context->setBoundVertexArrayObject(arrayObject);
    104     } else {
    105         m_context->webContext()->bindVertexArrayOES(0);
    106         m_context->setBoundVertexArrayObject(nullptr);
    107     }
    108 }
    109 
    110 bool OESVertexArrayObject::supported(WebGLRenderingContextBase* context)
    111 {
    112     return context->extensionsUtil()->supportsExtension("GL_OES_vertex_array_object");
    113 }
    114 
    115 const char* OESVertexArrayObject::extensionName()
    116 {
    117     return "OES_vertex_array_object";
    118 }
    119 
    120 } // namespace WebCore
    121