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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_context.h" | |
6 | |
7 #include "base/logging.h" | |
8 #include "base/macros.h" | |
9 #include "base/memory/ref_counted.h" | |
10 #include "base/sys_info.h" | |
11 #include "ui/gl/gl_bindings.h" | |
12 #include "ui/gl/gl_context_egl.h" | |
13 #include "ui/gl/gl_context_osmesa.h" | |
14 #include "ui/gl/gl_context_stub.h" | |
15 #include "ui/gl/gl_implementation.h" | |
16 #include "ui/gl/gl_surface.h" | |
17 | |
18 namespace gl { | |
19 | |
20 namespace { | |
21 | |
22 // Used to render into an already current context+surface, | |
23 // that we do not have ownership of (draw callback). | |
24 // TODO(boliu): Make this inherit from GLContextEGL. | |
25 class GLNonOwnedContext : public GLContextReal { | |
26 public: | |
27 GLNonOwnedContext(GLShareGroup* share_group); | |
28 | |
29 // Implement GLContext. | |
30 bool Initialize(GLSurface* compatible_surface, | |
31 GpuPreference gpu_preference) override; | |
32 bool MakeCurrent(GLSurface* surface) override; | |
33 void ReleaseCurrent(GLSurface* surface) override {} | |
34 bool IsCurrent(GLSurface* surface) override { return true; } | |
35 void* GetHandle() override { return nullptr; } | |
36 void OnSetSwapInterval(int interval) override {} | |
37 std::string GetExtensions() override; | |
38 | |
39 protected: | |
40 ~GLNonOwnedContext() override {} | |
41 | |
42 private: | |
43 EGLDisplay display_; | |
44 | |
45 DISALLOW_COPY_AND_ASSIGN(GLNonOwnedContext); | |
46 }; | |
47 | |
48 GLNonOwnedContext::GLNonOwnedContext(GLShareGroup* share_group) | |
49 : GLContextReal(share_group), display_(nullptr) {} | |
50 | |
51 bool GLNonOwnedContext::Initialize(GLSurface* compatible_surface, | |
52 GpuPreference gpu_preference) { | |
53 display_ = eglGetDisplay(EGL_DEFAULT_DISPLAY); | |
54 return true; | |
55 } | |
56 | |
57 bool GLNonOwnedContext::MakeCurrent(GLSurface* surface) { | |
58 SetCurrent(surface); | |
59 SetRealGLApi(); | |
60 return true; | |
61 } | |
62 | |
63 std::string GLNonOwnedContext::GetExtensions() { | |
64 const char* extensions = eglQueryString(display_, EGL_EXTENSIONS); | |
65 if (!extensions) | |
66 return GLContext::GetExtensions(); | |
67 | |
68 return GLContext::GetExtensions() + " " + extensions; | |
69 } | |
70 | |
71 } // anonymous namespace | |
72 | |
73 // static | |
74 scoped_refptr<GLContext> GLContext::CreateGLContext( | |
75 GLShareGroup* share_group, | |
76 GLSurface* compatible_surface, | |
77 GpuPreference gpu_preference) { | |
78 scoped_refptr<GLContext> context; | |
79 switch (GetGLImplementation()) { | |
80 case kGLImplementationMockGL: | |
81 return scoped_refptr<GLContext>(new GLContextStub(share_group)); | |
82 case kGLImplementationOSMesaGL: | |
83 context = new GLContextOSMesa(share_group); | |
84 break; | |
85 default: | |
86 if (compatible_surface->GetHandle()) | |
87 context = new GLContextEGL(share_group); | |
88 else | |
89 context = new GLNonOwnedContext(share_group); | |
90 break; | |
91 } | |
92 | |
93 if (!context->Initialize(compatible_surface, gpu_preference)) | |
94 return nullptr; | |
95 | |
96 return context; | |
97 } | |
98 | |
99 } | |
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