1/*
2 * Copyright (c) 2010, Google 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 are
6 * met:
7 *     * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 *     * Redistributions in binary form must reproduce the above
10 * copyright notice, this list of conditions and the following disclaimer
11 * in the documentation and/or other materials provided with the
12 * distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
15 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
16 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
17 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
18 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
19 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
20 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#ifndef WebGLContextAttributes_h
28#define WebGLContextAttributes_h
29
30#include "bindings/v8/ScriptWrappable.h"
31#include "core/html/canvas/CanvasContextAttributes.h"
32#include "core/platform/graphics/GraphicsContext3D.h"
33#include "wtf/PassRefPtr.h"
34
35namespace WebCore {
36
37class WebGLContextAttributes : public CanvasContextAttributes, public ScriptWrappable {
38public:
39    virtual ~WebGLContextAttributes();
40
41    // Create a new attributes object
42    static PassRefPtr<WebGLContextAttributes> create();
43
44    // Create a new attributes object initialized with preexisting attributes
45    static PassRefPtr<WebGLContextAttributes> create(GraphicsContext3D::Attributes attributes);
46
47    // Whether or not the drawing buffer has an alpha channel; default=true
48    bool alpha() const;
49    void setAlpha(bool alpha);
50
51    // Whether or not the drawing buffer has a depth buffer; default=true
52    bool depth() const;
53    void setDepth(bool depth);
54
55    // Whether or not the drawing buffer has a stencil buffer; default=true
56    bool stencil() const;
57    void setStencil(bool stencil);
58
59    // Whether or not the drawing buffer is antialiased; default=true
60    bool antialias() const;
61    void setAntialias(bool antialias);
62
63    // Whether or not to treat the values in the drawing buffer as
64    // though their alpha channel has already been multiplied into the
65    // color channels; default=true
66    bool premultipliedAlpha() const;
67    void setPremultipliedAlpha(bool premultipliedAlpha);
68
69    // Whether or not to preserve the drawing buffer after presentation to the
70    // screen; default=false
71    bool preserveDrawingBuffer() const;
72    void setPreserveDrawingBuffer(bool);
73
74    // Fetches a copy of the attributes stored in this object in a
75    // form that can be used to initialize a GraphicsContext3D.
76    GraphicsContext3D::Attributes attributes() const;
77
78protected:
79    WebGLContextAttributes();
80    WebGLContextAttributes(GraphicsContext3D::Attributes attributes);
81
82private:
83    GraphicsContext3D::Attributes m_attrs;
84};
85
86} // namespace WebCore
87
88#endif // WebGLContextAttributes_h
89