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#include "platform/graphics/gpu/AcceleratedImageBufferSurface.h"
33
34#include "public/platform/Platform.h"
35#include "public/platform/WebGraphicsContext3DProvider.h"
36#include "third_party/skia/include/core/SkCanvas.h"
37#include "third_party/skia/include/core/SkDevice.h"
38#include "third_party/skia/include/gpu/GrRenderTarget.h"
39#include "third_party/skia/include/gpu/GrTexture.h"
40#include "wtf/PassOwnPtr.h"
41#include "wtf/RefPtr.h"
42
43namespace blink {
44
45AcceleratedImageBufferSurface::AcceleratedImageBufferSurface(const IntSize& size, OpacityMode opacityMode, int msaaSampleCount)
46    : ImageBufferSurface(size, opacityMode)
47{
48    m_contextProvider = adoptPtr(blink::Platform::current()->createSharedOffscreenGraphicsContext3DProvider());
49    if (!m_contextProvider)
50        return;
51    GrContext* grContext = m_contextProvider->grContext();
52    if (!grContext)
53        return;
54
55    SkAlphaType alphaType = (Opaque == opacityMode) ? kOpaque_SkAlphaType : kPremul_SkAlphaType;
56    SkImageInfo info = SkImageInfo::MakeN32(size.width(), size.height(), alphaType);
57    m_surface = adoptPtr(SkSurface::NewScratchRenderTarget(grContext, info, msaaSampleCount));
58    if (!m_surface.get())
59        return;
60    clear();
61}
62
63Platform3DObject AcceleratedImageBufferSurface::getBackingTexture() const
64{
65    GrRenderTarget* renderTarget = m_surface->getCanvas()->getTopDevice()->accessRenderTarget();
66    if (renderTarget) {
67        return renderTarget->asTexture()->getTextureHandle();
68    }
69    return 0;
70}
71
72} // namespace blink
73