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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 
43 namespace blink {
44 
AcceleratedImageBufferSurface(const IntSize & size,OpacityMode opacityMode,int msaaSampleCount)45 AcceleratedImageBufferSurface::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 
getBackingTexture() const63 Platform3DObject 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