Support ozone=1 compositor_unittests with OSMesa

ui/gl/gl_implementation_ozone.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "base/base_paths.h"
-#include "base/command_line.h"
-#include "base/files/file_path.h"
-#include "base/logging.h"
-#include "base/native_library.h"
-#include "base/path_service.h"
 #include "ui/base/ozone/surface_factory_ozone.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_egl_api_implementation.h"
 #include "ui/gl/gl_gl_api_implementation.h"
 #include "ui/gl/gl_implementation.h"
+#include "ui/gl/gl_implementation_linux.h"
 #include "ui/gl/gl_osmesa_api_implementation.h"
 
 namespace gfx {
 
 namespace {
 
 void GL_BINDING_CALL MarshalClearDepthToClearDepthf(GLclampd depth) {
   glClearDepthf(static_cast<GLclampf>(depth));
 }
 
 void GL_BINDING_CALL MarshalDepthRangeToDepthRangef(GLclampd z_near,
                                                     GLclampd z_far) {
   glDepthRangef(static_cast<GLclampf>(z_near), static_cast<GLclampf>(z_far));
 }
 
 }  // namespace
 
 void GetAllowedGLImplementations(std::vector<GLImplementation>* impls) {
   impls->push_back(kGLImplementationEGLGLES2);
+  impls->push_back(kGLImplementationOSMesaGL);
 }
 
 bool InitializeGLBindings(GLImplementation implementation) {
   // Prevent reinitialization with a different implementation. Once the gpu
   // unit tests have initialized with kGLImplementationMock, we don't want to
   // later switch to another GL implementation.
   if (GetGLImplementation() != kGLImplementationNone)
     return true;
 
   switch (implementation) {
+    case kGLImplementationOSMesaGL:
+      return InitializeGLBindingsOSMesaGL();
     case kGLImplementationEGLGLES2:
       if (!ui::SurfaceFactoryOzone::GetInstance()->LoadEGLGLES2Bindings())
         return false;
       SetGLImplementation(kGLImplementationEGLGLES2);
       InitializeGLBindingsGL();
       InitializeGLBindingsEGL();
 
       // These two functions take single precision float rather than double
       // precision float parameters in GLES.
       ::gfx::g_driver_gl.fn.glClearDepthFn = MarshalClearDepthToClearDepthf;
       ::gfx::g_driver_gl.fn.glDepthRangeFn = MarshalDepthRangeToDepthRangef;
       break;
     case kGLImplementationMockGL: {
       SetGLGetProcAddressProc(GetMockGLProcAddress);
       SetGLImplementation(kGLImplementationMockGL);
       InitializeGLBindingsGL();
       break;
     }
     default:
       NOTIMPLEMENTED()
-          << "Unsupported GL type for NativeSurfaceLinux GL implementation";
+          << "Unsupported GL type for Ozone surface implementation";
       return false;
   }
 
   return true;
 }
 
 bool InitializeGLExtensionBindings(GLImplementation implementation,
                                    GLContext* context) {
   switch (implementation) {
+    case kGLImplementationOSMesaGL:
+      InitializeGLExtensionBindingsGL(context);
+      InitializeGLExtensionBindingsOSMESA(context);
+      break;
     case kGLImplementationEGLGLES2:
       InitializeGLExtensionBindingsGL(context);
       InitializeGLExtensionBindingsEGL(context);
       break;
     case kGLImplementationMockGL:
       InitializeGLExtensionBindingsGL(context);
       break;
     default:
       return false;
   }
@@ skipping 15 matching lines @@
   switch (GetGLImplementation()) {
     case kGLImplementationEGLGLES2:
       return GetGLWindowSystemBindingInfoEGL(info);
     default:
       return false;
   }
   return false;
 }
 
 }  // namespace gfx