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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 // This file implements the GLContextWGL and PbufferGLContext classes. | |
| 6 | |
| 7 #include "ui/gfx/gl/gl_context_wgl.h" | |
| 8 | |
| 9 #include "base/debug/trace_event.h" | |
| 10 #include "base/logging.h" | |
| 11 #include "ui/gfx/gl/gl_bindings.h" | |
| 12 #include "ui/gfx/gl/gl_implementation.h" | |
| 13 #include "ui/gfx/gl/gl_surface_wgl.h" | |
| 14 | |
| 15 namespace gfx { | |
| 16 | |
| 17 GLContextWGL::GLContextWGL(GLShareGroup* share_group) | |
| 18 : GLContext(share_group), | |
| 19 context_(NULL) { | |
| 20 } | |
| 21 | |
| 22 GLContextWGL::~GLContextWGL() { | |
| 23 Destroy(); | |
| 24 } | |
| 25 | |
| 26 std::string GLContextWGL::GetExtensions() { | |
| 27 const char* extensions = NULL; | |
| 28 if (wglGetExtensionsStringARB) | |
| 29 extensions = wglGetExtensionsStringARB(GLSurfaceWGL::GetDisplayDC()); | |
| 30 else if (wglGetExtensionsStringEXT) | |
| 31 extensions = wglGetExtensionsStringEXT(); | |
| 32 | |
| 33 if (extensions) | |
| 34 return GLContext::GetExtensions() + " " + extensions; | |
| 35 | |
| 36 return GLContext::GetExtensions(); | |
| 37 } | |
| 38 | |
| 39 bool GLContextWGL::Initialize( | |
| 40 GLSurface* compatible_surface, GpuPreference gpu_preference) { | |
| 41 // Get the handle of another initialized context in the share group _before_ | |
| 42 // setting context_. Otherwise this context will be considered initialized | |
| 43 // and could potentially be returned by GetHandle. | |
| 44 HGLRC share_handle = static_cast<HGLRC>(share_group()->GetHandle()); | |
| 45 | |
| 46 context_ = wglCreateContext( | |
| 47 static_cast<HDC>(compatible_surface->GetHandle())); | |
| 48 if (!context_) { | |
| 49 LOG(ERROR) << "Failed to create GL context."; | |
| 50 Destroy(); | |
| 51 return false; | |
| 52 } | |
| 53 | |
| 54 if (share_handle) { | |
| 55 if (!wglShareLists(share_handle, context_)) { | |
| 56 LOG(ERROR) << "Could not share GL contexts."; | |
| 57 Destroy(); | |
| 58 return false; | |
| 59 } | |
| 60 } | |
| 61 | |
| 62 return true; | |
| 63 } | |
| 64 | |
| 65 void GLContextWGL::Destroy() { | |
| 66 if (context_) { | |
| 67 wglDeleteContext(context_); | |
| 68 context_ = NULL; | |
| 69 } | |
| 70 } | |
| 71 | |
| 72 bool GLContextWGL::MakeCurrent(GLSurface* surface) { | |
| 73 DCHECK(context_); | |
| 74 if (IsCurrent(surface)) | |
| 75 return true; | |
| 76 | |
| 77 TRACE_EVENT0("gpu", "GLContextWGL::MakeCurrent"); | |
| 78 | |
| 79 if (!wglMakeCurrent(static_cast<HDC>(surface->GetHandle()), context_)) { | |
| 80 LOG(ERROR) << "Unable to make gl context current."; | |
| 81 return false; | |
| 82 } | |
| 83 | |
| 84 SetCurrent(this, surface); | |
| 85 if (!InitializeExtensionBindings()) { | |
| 86 ReleaseCurrent(surface); | |
| 87 return false; | |
| 88 } | |
| 89 | |
| 90 if (!surface->OnMakeCurrent(this)) { | |
| 91 LOG(ERROR) << "Could not make current."; | |
| 92 return false; | |
| 93 } | |
| 94 | |
| 95 return true; | |
| 96 } | |
| 97 | |
| 98 void GLContextWGL::ReleaseCurrent(GLSurface* surface) { | |
| 99 if (!IsCurrent(surface)) | |
| 100 return; | |
| 101 | |
| 102 SetCurrent(NULL, NULL); | |
| 103 wglMakeCurrent(NULL, NULL); | |
| 104 } | |
| 105 | |
| 106 bool GLContextWGL::IsCurrent(GLSurface* surface) { | |
| 107 bool native_context_is_current = | |
| 108 wglGetCurrentContext() == context_; | |
| 109 | |
| 110 // If our context is current then our notion of which GLContext is | |
| 111 // current must be correct. On the other hand, third-party code | |
| 112 // using OpenGL might change the current context. | |
| 113 DCHECK(!native_context_is_current || (GetCurrent() == this)); | |
| 114 | |
| 115 if (!native_context_is_current) | |
| 116 return false; | |
| 117 | |
| 118 if (surface) { | |
| 119 if (wglGetCurrentDC() != surface->GetHandle()) | |
| 120 return false; | |
| 121 } | |
| 122 | |
| 123 return true; | |
| 124 } | |
| 125 | |
| 126 void* GLContextWGL::GetHandle() { | |
| 127 return context_; | |
| 128 } | |
| 129 | |
| 130 void GLContextWGL::SetSwapInterval(int interval) { | |
| 131 DCHECK(IsCurrent(NULL)); | |
| 132 if (gfx::g_WGL_EXT_swap_control) { | |
| 133 wglSwapIntervalEXT(interval); | |
| 134 } else { | |
| 135 LOG(WARNING) << | |
| 136 "Could not disable vsync: driver does not " | |
| 137 "support WGL_EXT_swap_control"; | |
| 138 } | |
| 139 } | |
| 140 | |
| 141 } // namespace gfx | |
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Chromium Code Reviews
Issue 10392068:
ui: Move gl/ directory out of gfx/, up to ui/. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src