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 WebGLProgram_h

    27 #define WebGLProgram_h

    28 

    29 #include "CanvasObject.h"

    30 

    31 #include <wtf/PassRefPtr.h>

    32 #include <wtf/RefCounted.h>

    33 #include <wtf/Vector.h>

    34 

    35 namespace WebCore {

    36     

    37     class WebGLProgram : public CanvasObject {

    38     public:

    39         virtual ~WebGLProgram() { deleteObject(); }

    40         

    41         static PassRefPtr<WebGLProgram> create(WebGLRenderingContext*);

    42 

    43         // cacheActiveAttribLocation() is only called once after linkProgram()

    44         // succeeds.

    45         bool cacheActiveAttribLocations();

    46         int numActiveAttribLocations() const;

    47         int getActiveAttribLocation(int index) const;

    48 

    49         bool isUsingVertexAttrib0() const;

    50 

    51         // Return true means getProgramParameter(LINK_STATUS) should return

    52         // false; return false means we should actually call

    53         // getProgramParameter(LINK_STATUS) to find out.

    54         bool isLinkFailureFlagSet() const { return m_linkFailure; }

    55         void setLinkFailureFlag(bool failed) { m_linkFailure = failed; }

    56 

    57     protected:

    58         WebGLProgram(WebGLRenderingContext*);

    59         

    60         virtual void _deleteObject(Platform3DObject);

    61 

    62     private:

    63         virtual bool isProgram() const { return true; }

    64 

    65         Vector<int> m_activeAttribLocations;

    66 

    67         bool m_linkFailure;

    68     };

    69     

    70 } // namespace WebCore

    71 

    72 #endif // WebGLProgram_h