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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/core/v8/ExceptionState.h"
     31 #include "core/html/canvas/WebGLRenderingContextBase.h"
     32 #include "core/html/canvas/WebGLVertexArrayObjectOES.h"
     33 
     34 namespace blink {
     35 
     36 OESVertexArrayObject::OESVertexArrayObject(WebGLRenderingContextBase* context)
     37     : WebGLExtension(context)
     38 {
     39     context->extensionsUtil()->ensureExtensionEnabled("GL_OES_vertex_array_object");
     40 }
     41 
     42 OESVertexArrayObject::~OESVertexArrayObject()
     43 {
     44 }
     45 
     46 WebGLExtensionName OESVertexArrayObject::name() const
     47 {
     48     return OESVertexArrayObjectName;
     49 }
     50 
     51 PassRefPtrWillBeRawPtr<OESVertexArrayObject> OESVertexArrayObject::create(WebGLRenderingContextBase* context)
     52 {
     53     return adoptRefWillBeNoop(new OESVertexArrayObject(context));
     54 }
     55 
     56 PassRefPtrWillBeRawPtr<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 
     66 void 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 
     77 GLboolean 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 
     88 void 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 
    109 bool OESVertexArrayObject::supported(WebGLRenderingContextBase* context)
    110 {
    111     return context->extensionsUtil()->supportsExtension("GL_OES_vertex_array_object");
    112 }
    113 
    114 const char* OESVertexArrayObject::extensionName()
    115 {
    116     return "OES_vertex_array_object";
    117 }
    118 
    119 } // namespace blink
    120