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 #ifndef CanvasObject_h

    27 #define CanvasObject_h

    28 

    29 #include <wtf/PassRefPtr.h>

    30 #include <wtf/RefCounted.h>

    31 

    32 #include "GraphicsContext3D.h"

    33 

    34 namespace WebCore {

    35 

    36     class WebGLRenderingContext;

    37     

    38     class CanvasObject : public RefCounted<CanvasObject> {

    39     public:

    40         virtual ~CanvasObject();

    41         

    42         Platform3DObject object() const { return m_object; }

    43         void setObject(Platform3DObject, bool shouldDeleteObject = true);

    44         void deleteObject();

    45         

    46         void detachContext()

    47         {

    48             deleteObject();

    49             m_context = 0;

    50         }

    51 

    52         WebGLRenderingContext* context() const { return m_context; }

    53 

    54         virtual bool isBuffer() const { return false; }

    55         virtual bool isFramebuffer() const { return false; }

    56         virtual bool isProgram() const { return false; }

    57         virtual bool isRenderbuffer() const { return false; }

    58         virtual bool isShader() const { return false; }

    59         virtual bool isTexture() const { return false; }

    60 

    61     protected:

    62         CanvasObject(WebGLRenderingContext*);

    63         virtual void _deleteObject(Platform3DObject) = 0;

    64     

    65     private:

    66         Platform3DObject m_object;

    67         // The shouldDeleteObject flag indicates whether this wrapper

    68         // owns the underlying resource and should delete it when the

    69         // wrapper is unreferenced for the last time and deleted. It

    70         // is only set to false for certain objects returned from get

    71         // queries. FIXME: should consider canonicalizing all of these

    72         // objects in the future.

    73         bool m_shouldDeleteObject;

    74         WebGLRenderingContext* m_context;

    75     };

    76     

    77 } // namespace WebCore

    78 

    79 #endif // CanvasObject_h