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1 // Copyright (c) 2012 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 "ui/gl/gl_surface.h" | |
6 | |
7 #include <memory> | |
8 | |
9 #include "base/logging.h" | |
10 #include "base/macros.h" | |
11 #include "base/trace_event/trace_event.h" | |
12 #include "ui/gl/gl_bindings.h" | |
13 #include "ui/gl/gl_context.h" | |
14 #include "ui/gl/gl_export.h" | |
15 #include "ui/gl/gl_implementation.h" | |
16 #include "ui/gl/gl_surface_osmesa.h" | |
17 #include "ui/gl/gl_surface_stub.h" | |
18 | |
19 namespace gl { | |
20 namespace { | |
21 | |
22 // A "no-op" surface. It is not required that a CGLContextObj have an | |
23 // associated drawable (pbuffer or fullscreen context) in order to be | |
24 // made current. Everywhere this surface type is used, we allocate an | |
25 // FBO at the user level as the drawable of the associated context. | |
26 class GL_EXPORT NoOpGLSurface : public GLSurface { | |
27 public: | |
28 explicit NoOpGLSurface(const gfx::Size& size) : size_(size) {} | |
29 | |
30 // Implement GLSurface. | |
31 bool Initialize(GLSurface::Format format) override { return true; } | |
32 void Destroy() override {} | |
33 bool IsOffscreen() override { return true; } | |
34 gfx::SwapResult SwapBuffers() override { | |
35 NOTREACHED() << "Cannot call SwapBuffers on a NoOpGLSurface."; | |
36 return gfx::SwapResult::SWAP_FAILED; | |
37 } | |
38 gfx::Size GetSize() override { return size_; } | |
39 void* GetHandle() override { return NULL; } | |
40 void* GetDisplay() override { return NULL; } | |
41 bool IsSurfaceless() const override { return true; } | |
42 | |
43 protected: | |
44 ~NoOpGLSurface() override {} | |
45 | |
46 private: | |
47 gfx::Size size_; | |
48 | |
49 DISALLOW_COPY_AND_ASSIGN(NoOpGLSurface); | |
50 }; | |
51 | |
52 } // namespace | |
53 | |
54 scoped_refptr<GLSurface> GLSurface::CreateViewGLSurface( | |
55 gfx::AcceleratedWidget window) { | |
56 TRACE_EVENT0("gpu", "GLSurface::CreateViewGLSurface"); | |
57 switch (GetGLImplementation()) { | |
58 case kGLImplementationDesktopGL: | |
59 case kGLImplementationDesktopGLCoreProfile: | |
60 case kGLImplementationAppleGL: { | |
61 NOTIMPLEMENTED() << "No onscreen support on Mac."; | |
62 return NULL; | |
63 } | |
64 case kGLImplementationOSMesaGL: { | |
65 scoped_refptr<GLSurface> surface(new GLSurfaceOSMesaHeadless()); | |
66 if (!surface->Initialize()) | |
67 return NULL; | |
68 return surface; | |
69 } | |
70 case kGLImplementationMockGL: | |
71 return new GLSurfaceStub; | |
72 default: | |
73 NOTREACHED(); | |
74 return NULL; | |
75 } | |
76 } | |
77 | |
78 scoped_refptr<GLSurface> GLSurface::CreateOffscreenGLSurface( | |
79 const gfx::Size& size) { | |
80 TRACE_EVENT0("gpu", "GLSurface::CreateOffscreenGLSurface"); | |
81 switch (GetGLImplementation()) { | |
82 case kGLImplementationOSMesaGL: { | |
83 scoped_refptr<GLSurface> surface( | |
84 new GLSurfaceOSMesa(SURFACE_OSMESA_RGBA, size)); | |
85 if (!surface->Initialize()) | |
86 return NULL; | |
87 | |
88 return surface; | |
89 } | |
90 case kGLImplementationDesktopGL: | |
91 case kGLImplementationDesktopGLCoreProfile: | |
92 case kGLImplementationAppleGL: { | |
93 scoped_refptr<GLSurface> surface(new NoOpGLSurface(size)); | |
94 if (!surface->Initialize()) | |
95 return NULL; | |
96 | |
97 return surface; | |
98 } | |
99 case kGLImplementationMockGL: | |
100 return new GLSurfaceStub; | |
101 default: | |
102 NOTREACHED(); | |
103 return NULL; | |
104 } | |
105 } | |
106 | |
107 } // namespace gl | |
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