1/*
2 * Copyright (c) 2010, Google Inc. All rights reserved.
3 * Copyright (c) 2012, Collabora Ltd.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 *     * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *     * Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following disclaimer
13 * in the documentation and/or other materials provided with the
14 * distribution.
15 *     * Neither the name of Google Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include "config.h"
33
34#if ENABLE(ACCELERATED_2D_CANVAS) || USE(3D_GRAPHICS)
35
36#include "DrawingBuffer.h"
37
38#include "Extensions3D.h"
39
40namespace WebCore {
41
42DrawingBuffer::DrawingBuffer(GraphicsContext3D* context,
43                             const IntSize& size,
44                             bool multisampleExtensionSupported,
45                             bool packedDepthStencilExtensionSupported,
46                             PreserveDrawingBuffer preserveDrawingBuffer,
47                             AlphaRequirement alpha)
48    : m_preserveDrawingBuffer(preserveDrawingBuffer)
49    , m_alpha(alpha)
50    , m_frontColorBuffer(0)
51    , m_separateFrontTexture(false)
52{
53}
54
55DrawingBuffer::~DrawingBuffer()
56{
57}
58
59#if USE(ACCELERATED_COMPOSITING)
60void DrawingBuffer::prepareBackBuffer()
61{
62}
63
64bool DrawingBuffer::requiresCopyFromBackToFrontBuffer() const
65{
66    return false;
67}
68
69unsigned DrawingBuffer::frontColorBuffer() const
70{
71    return colorBuffer();
72}
73
74void DrawingBuffer::paintCompositedResultsToCanvas(ImageBuffer*)
75{
76}
77
78void DrawingBuffer::clearPlatformLayer()
79{
80}
81#endif
82
83}
84
85#endif
86