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1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "content/common/gpu/image_transport_surface.h" | |
6 | |
7 #include "base/macros.h" | |
8 #include "content/common/gpu/pass_through_image_transport_surface.h" | |
9 #include "ui/gfx/native_widget_types.h" | |
10 #include "ui/gl/gl_surface_osmesa.h" | |
11 | |
12 namespace content { | |
13 | |
14 scoped_refptr<gfx::GLSurface> ImageTransportSurfaceCreateNativeSurface( | |
15 GpuChannelManager* manager, | |
16 GpuCommandBufferStub* stub, | |
17 gpu::SurfaceHandle handle); | |
18 | |
19 namespace { | |
20 | |
21 // A subclass of GLSurfaceOSMesa that doesn't print an error message when | |
22 // SwapBuffers() is called. | |
23 class DRTSurfaceOSMesa : public gfx::GLSurfaceOSMesa { | |
24 public: | |
25 // Size doesn't matter, the surface is resized to the right size later. | |
26 DRTSurfaceOSMesa() | |
27 : GLSurfaceOSMesa(gfx::GLSurface::SURFACE_OSMESA_RGBA, gfx::Size(1, 1)) {} | |
28 | |
29 // Implement a subset of GLSurface. | |
30 gfx::SwapResult SwapBuffers() override; | |
31 | |
32 private: | |
33 ~DRTSurfaceOSMesa() override {} | |
34 DISALLOW_COPY_AND_ASSIGN(DRTSurfaceOSMesa); | |
35 }; | |
36 | |
37 gfx::SwapResult DRTSurfaceOSMesa::SwapBuffers() { | |
38 return gfx::SwapResult::SWAP_ACK; | |
39 } | |
40 | |
41 bool g_allow_os_mesa = false; | |
42 | |
43 } // namespace | |
44 | |
45 // static | |
46 scoped_refptr<gfx::GLSurface> ImageTransportSurface::CreateNativeSurface( | |
47 GpuChannelManager* manager, | |
48 GpuCommandBufferStub* stub, | |
49 gpu::SurfaceHandle surface_handle, | |
50 gfx::GLSurface::Format format) { | |
51 DCHECK_NE(surface_handle, gpu::kNullSurfaceHandle); | |
52 | |
53 switch (gfx::GetGLImplementation()) { | |
54 case gfx::kGLImplementationDesktopGL: | |
55 case gfx::kGLImplementationDesktopGLCoreProfile: | |
56 case gfx::kGLImplementationAppleGL: | |
57 return ImageTransportSurfaceCreateNativeSurface(manager, stub, | |
58 surface_handle); | |
59 default: | |
60 // Content shell in DRT mode spins up a gpu process which needs an | |
61 // image transport surface, but that surface isn't used to read pixel | |
62 // baselines. So this is mostly a dummy surface. | |
63 if (!g_allow_os_mesa) { | |
64 NOTREACHED(); | |
65 return nullptr; | |
66 } | |
67 scoped_refptr<gfx::GLSurface> surface(new DRTSurfaceOSMesa()); | |
68 if (!surface.get() || !surface->Initialize(format)) | |
69 return surface; | |
70 return scoped_refptr<gfx::GLSurface>(new PassThroughImageTransportSurface( | |
71 manager, stub, surface.get())); | |
72 } | |
73 } | |
74 | |
75 // static | |
76 void ImageTransportSurface::SetAllowOSMesaForTesting(bool allow) { | |
77 g_allow_os_mesa = allow; | |
78 } | |
79 | |
80 } // namespace content | |
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