1/*
2 * Copyright (c) 2013, 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 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "config.h"
32
33#include "platform/graphics/gpu/WebGLImageBufferSurface.h"
34
35#include "platform/graphics/skia/GaneshUtils.h"
36#include "public/platform/Platform.h"
37#include "public/platform/WebGraphicsContext3DProvider.h"
38#include "third_party/skia/include/core/SkPixelRef.h"
39#include "wtf/PassOwnPtr.h"
40
41namespace blink {
42
43WebGLImageBufferSurface::WebGLImageBufferSurface(const IntSize& size, OpacityMode opacityMode)
44    : ImageBufferSurface(size, opacityMode)
45{
46    m_contextProvider = adoptPtr(Platform::current()->createSharedOffscreenGraphicsContext3DProvider());
47    if (!m_contextProvider)
48        return;
49    GrContext* gr = m_contextProvider->grContext();
50    if (!gr)
51        return;
52    ensureTextureBackedSkBitmap(gr, m_bitmap, size, kDefault_GrSurfaceOrigin, kRGBA_8888_GrPixelConfig);
53}
54
55WebGLImageBufferSurface::~WebGLImageBufferSurface()
56{
57}
58
59Platform3DObject WebGLImageBufferSurface::getBackingTexture() const
60{
61    GrTexture* texture = m_bitmap.getTexture();
62    if (!texture)
63        return 0;
64    return texture->getTextureHandle();
65}
66
67void WebGLImageBufferSurface::didModifyBackingTexture()
68{
69    if (!m_bitmap.isNull()) {
70        m_bitmap.pixelRef()->notifyPixelsChanged();
71    }
72}
73
74void WebGLImageBufferSurface::invalidateCachedBitmap()
75{
76    m_cachedBitmap.reset();
77}
78
79void WebGLImageBufferSurface::updateCachedBitmapIfNeeded()
80{
81    if (m_cachedBitmap.isNull() && m_bitmap.pixelRef()) {
82        (m_bitmap.pixelRef())->readPixels(&m_cachedBitmap);
83    }
84}
85
86} // namespace blink
87