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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/WebGLRenderbuffer.h"
     29 
     30 #include "core/html/canvas/WebGLRenderingContextBase.h"
     31 
     32 namespace blink {
     33 
     34 PassRefPtrWillBeRawPtr<WebGLRenderbuffer> WebGLRenderbuffer::create(WebGLRenderingContextBase* ctx)
     35 {
     36     return adoptRefWillBeNoop(new WebGLRenderbuffer(ctx));
     37 }
     38 
     39 WebGLRenderbuffer::~WebGLRenderbuffer()
     40 {
     41 #if ENABLE(OILPAN)
     42     // This render buffer (heap) object must finalize itself.
     43     m_emulatedStencilBuffer.clear();
     44 #endif
     45     // Always call detach here to ensure that platform object deletion
     46     // happens with Oilpan enabled. It keeps the code regular to do it
     47     // with or without Oilpan enabled.
     48     //
     49     // See comment in WebGLBuffer's destructor for additional
     50     // information on why this is done for WebGLSharedObject-derived
     51     // objects.
     52     detachAndDeleteObject();
     53 }
     54 
     55 WebGLRenderbuffer::WebGLRenderbuffer(WebGLRenderingContextBase* ctx)
     56     : WebGLSharedObject(ctx)
     57     , m_internalFormat(GL_RGBA4)
     58     , m_width(0)
     59     , m_height(0)
     60     , m_hasEverBeenBound(false)
     61 {
     62     setObject(ctx->webContext()->createRenderbuffer());
     63 }
     64 
     65 void WebGLRenderbuffer::deleteObjectImpl(blink::WebGraphicsContext3D* context3d, Platform3DObject object)
     66 {
     67     context3d->deleteRenderbuffer(object);
     68     deleteEmulatedStencilBuffer(context3d);
     69 }
     70 
     71 void WebGLRenderbuffer::deleteEmulatedStencilBuffer(blink::WebGraphicsContext3D* context3d)
     72 {
     73     if (!m_emulatedStencilBuffer)
     74         return;
     75     m_emulatedStencilBuffer->deleteObject(context3d);
     76     m_emulatedStencilBuffer.clear();
     77 }
     78 
     79 void WebGLRenderbuffer::trace(Visitor* visitor)
     80 {
     81     visitor->trace(m_emulatedStencilBuffer);
     82     WebGLSharedObject::trace(visitor);
     83 }
     84 
     85 }
     86