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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/WebGLBuffer.h"
     29 
     30 #include "core/html/canvas/WebGLRenderingContextBase.h"
     31 
     32 namespace blink {
     33 
     34 PassRefPtrWillBeRawPtr<WebGLBuffer> WebGLBuffer::create(WebGLRenderingContextBase* ctx)
     35 {
     36     return adoptRefWillBeNoop(new WebGLBuffer(ctx));
     37 }
     38 
     39 WebGLBuffer::WebGLBuffer(WebGLRenderingContextBase* ctx)
     40     : WebGLSharedObject(ctx)
     41     , m_target(0)
     42 {
     43     setObject(ctx->webContext()->createBuffer());
     44 }
     45 
     46 WebGLBuffer::~WebGLBuffer()
     47 {
     48     // Delete the buffer's platform object. This object will have been
     49     // detached from the WebGLContextGroup if the group object was
     50     // finalized first. With Oilpan not enabled, it always will be,
     51     // but with Oilpan enabled, the WebGLBuffer might end up being
     52     // finalized first. In which case detachment is needed to ensure
     53     // that the platform object is indeed deleted.
     54     //
     55     // To keep the code regular, the trivial detach()ment is always
     56     // performed.
     57     detachAndDeleteObject();
     58 }
     59 
     60 void WebGLBuffer::deleteObjectImpl(blink::WebGraphicsContext3D* context3d, Platform3DObject object)
     61 {
     62       context3d->deleteBuffer(object);
     63 }
     64 
     65 void WebGLBuffer::setTarget(GLenum target)
     66 {
     67     // In WebGL, a buffer is bound to one target in its lifetime
     68     if (m_target)
     69         return;
     70     if (target == GL_ARRAY_BUFFER || target == GL_ELEMENT_ARRAY_BUFFER)
     71         m_target = target;
     72 }
     73 
     74 }
     75