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      1 /*
      2  * Copyright (C) 2009 Apple 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/WebGLObject.h"
     29 
     30 namespace WebCore {
     31 
     32 WebGLObject::WebGLObject(WebGLRenderingContext*)
     33     : m_object(0)
     34     , m_attachmentCount(0)
     35     , m_deleted(false)
     36 {
     37 }
     38 
     39 WebGLObject::~WebGLObject()
     40 {
     41 }
     42 
     43 void WebGLObject::setObject(Platform3DObject object)
     44 {
     45     // object==0 && m_deleted==false indicating an uninitialized state;
     46     ASSERT(!m_object && !m_deleted);
     47     m_object = object;
     48 }
     49 
     50 void WebGLObject::deleteObject(GraphicsContext3D* context3d)
     51 {
     52     m_deleted = true;
     53     if (!m_object)
     54         return;
     55 
     56     if (!hasGroupOrContext())
     57         return;
     58 
     59     if (!m_attachmentCount) {
     60         if (!context3d)
     61             context3d = getAGraphicsContext3D();
     62 
     63         if (context3d)
     64             deleteObjectImpl(context3d, m_object);
     65 
     66         m_object = 0;
     67     }
     68 }
     69 
     70 void WebGLObject::detach()
     71 {
     72     m_attachmentCount = 0; // Make sure OpenGL resource is deleted.
     73     }
     74 
     75 
     76 void WebGLObject::onDetached(GraphicsContext3D* context3d)
     77 {
     78     if (m_attachmentCount)
     79         --m_attachmentCount;
     80     if (m_deleted)
     81         deleteObject(context3d);
     82 }
     83 
     84 }
     85