root/Source/core/html/canvas/WebGLContextAttributes.h

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INCLUDED FROM


/*
 * Copyright (c) 2010, Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
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 * in the documentation and/or other materials provided with the
 * distribution.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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#ifndef WebGLContextAttributes_h
#define WebGLContextAttributes_h

#include "bindings/v8/ScriptWrappable.h"
#include "core/html/canvas/CanvasContextAttributes.h"
#include "public/platform/WebGraphicsContext3D.h"
#include "wtf/PassRefPtr.h"

namespace WebCore {

class Settings;

class WebGLContextAttributes FINAL : public CanvasContextAttributes, public ScriptWrappable {
public:
    virtual ~WebGLContextAttributes();

    // Create a new attributes object
    static PassRefPtr<WebGLContextAttributes> create();

    // Create a copy of this object.
    PassRefPtr<WebGLContextAttributes> clone() const;

    // Whether or not the drawing buffer has an alpha channel; default=true
    bool alpha() const;
    void setAlpha(bool);

    // Whether or not the drawing buffer has a depth buffer; default=true
    bool depth() const;
    void setDepth(bool);

    // Whether or not the drawing buffer has a stencil buffer; default=false
    bool stencil() const;
    void setStencil(bool);

    // Whether or not the drawing buffer is antialiased; default=true
    bool antialias() const;
    void setAntialias(bool);

    // Whether or not to treat the values in the drawing buffer as
    // though their alpha channel has already been multiplied into the
    // color channels; default=true
    bool premultipliedAlpha() const;
    void setPremultipliedAlpha(bool);

    // Whether or not to preserve the drawing buffer after presentation to the
    // screen; default=false
    bool preserveDrawingBuffer() const;
    void setPreserveDrawingBuffer(bool);

    // Whether or not to fail context creation if performance will be
    // significantly degraded compared to a native GL context; default=false
    bool failIfMajorPerformanceCaveat() const;
    void setFailIfMajorPerformanceCaveat(bool);

    // Set up the attributes that can be used to initialize a WebGraphicsContext3D.
    // It's mostly based on WebGLContextAttributes, but would be adjusted based
    // on settings.
    blink::WebGraphicsContext3D::Attributes attributes(const blink::WebString&, Settings*) const;

protected:
    WebGLContextAttributes();
    WebGLContextAttributes(const WebGLContextAttributes&);

private:
    bool m_alpha;
    bool m_depth;
    bool m_stencil;
    bool m_antialias;
    bool m_premultipliedAlpha;
    bool m_preserveDrawingBuffer;
    bool m_failIfMajorPerformanceCaveat;
};

} // namespace WebCore

#endif // WebGLContextAttributes_h

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