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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 #if ENABLE(WEBGL)
     29 
     30 #include "OESVertexArrayObject.h"
     31 
     32 #include "Extensions3D.h"
     33 #include "WebGLRenderingContext.h"
     34 #include "WebGLVertexArrayObjectOES.h"
     35 
     36 namespace WebCore {
     37 
     38 OESVertexArrayObject::OESVertexArrayObject(WebGLRenderingContext* context)
     39     : WebGLExtension()
     40     , m_context(context)
     41 {
     42 }
     43 
     44 OESVertexArrayObject::~OESVertexArrayObject()
     45 {
     46 }
     47 
     48 WebGLExtension::ExtensionName OESVertexArrayObject::getName() const
     49 {
     50     return OESVertexArrayObjectName;
     51 }
     52 
     53 PassRefPtr<OESVertexArrayObject> OESVertexArrayObject::create(WebGLRenderingContext* context)
     54 {
     55     return adoptRef(new OESVertexArrayObject(context));
     56 }
     57 
     58 PassRefPtr<WebGLVertexArrayObjectOES> OESVertexArrayObject::createVertexArrayOES()
     59 {
     60     if (m_context->isContextLost())
     61         return 0;
     62 
     63     RefPtr<WebGLVertexArrayObjectOES> o = WebGLVertexArrayObjectOES::create(m_context, WebGLVertexArrayObjectOES::VaoTypeUser);
     64     m_context->addObject(o.get());
     65     return o.release();
     66 }
     67 
     68 void OESVertexArrayObject::deleteVertexArrayOES(WebGLVertexArrayObjectOES* arrayObject)
     69 {
     70     if (!arrayObject || m_context->isContextLost())
     71         return;
     72 
     73     arrayObject->deleteObject();
     74 }
     75 
     76 GC3Dboolean OESVertexArrayObject::isVertexArrayOES(WebGLVertexArrayObjectOES* arrayObject)
     77 {
     78     if (!arrayObject || m_context->isContextLost())
     79         return 0;
     80 
     81     if (!arrayObject->hasEverBeenBound())
     82         return 0;
     83 
     84     Extensions3D* extensions = m_context->graphicsContext3D()->getExtensions();
     85     return extensions->isVertexArrayOES(arrayObject->object());
     86 }
     87 
     88 void OESVertexArrayObject::bindVertexArrayOES(WebGLVertexArrayObjectOES* arrayObject, ExceptionCode& ec)
     89 {
     90     UNUSED_PARAM(ec);
     91     if (m_context->isContextLost())
     92         return;
     93 
     94     if (arrayObject && arrayObject->context() != m_context) {
     95         m_context->graphicsContext3D()->synthesizeGLError(GraphicsContext3D::INVALID_OPERATION);
     96         return;
     97     }
     98 
     99     Extensions3D* extensions = m_context->graphicsContext3D()->getExtensions();
    100     if (arrayObject && !arrayObject->isDefaultObject() && arrayObject->object()) {
    101         extensions->bindVertexArrayOES(arrayObject->object());
    102 
    103         arrayObject->setHasEverBeenBound();
    104         m_context->setBoundVertexArrayObject(arrayObject);
    105     } else {
    106         extensions->bindVertexArrayOES(0);
    107 
    108         m_context->setBoundVertexArrayObject(0);
    109     }
    110 
    111     m_context->cleanupAfterGraphicsCall(false);
    112 }
    113 
    114 } // namespace WebCore
    115 
    116 #endif // ENABLE(WEBGL)
    117