Revert of Move static GL binding initialization to //ui/gl/init.

ui/gl/gl_implementation_x11.cc

Index: ui/gl/gl_implementation_x11.cc
diff --git a/ui/gl/gl_implementation_x11.cc b/ui/gl/gl_implementation_x11.cc
index de19d7167a2d74a2695fd53dea3d344c92a7cbbb..776bb2d45a0ce419f674ac25b7f7efeb076f045c 100644
--- a/ui/gl/gl_implementation_x11.cc
+++ b/ui/gl/gl_implementation_x11.cc
@@ -2,16 +2,50 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "ui/gl/gl_implementation.h"
-
+#include <vector>
+
+#include "base/command_line.h"
+#include "base/logging.h"
+#include "base/path_service.h"
+#include "base/threading/thread_restrictions.h"
+#include "build/build_config.h"
+#include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_context_stub_with_extensions.h"
 #include "ui/gl/gl_egl_api_implementation.h"
 #include "ui/gl/gl_gl_api_implementation.h"
 #include "ui/gl/gl_glx_api_implementation.h"
+#include "ui/gl/gl_implementation.h"
 #include "ui/gl/gl_implementation_osmesa.h"
 #include "ui/gl/gl_osmesa_api_implementation.h"
+#include "ui/gl/gl_switches.h"
 
 namespace gl {
+namespace {
+
+// TODO(piman): it should be Desktop GL marshalling from double to float. Today
+// on native GLES, we do float->double->float.
+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));
+}
+
+#if defined(OS_OPENBSD)
+const char kGLLibraryName[] = "libGL.so";
+#else
+const char kGLLibraryName[] = "libGL.so.1";
+#endif
+
+const char kGLESv2LibraryName[] = "libGLESv2.so.2";
+const char kEGLLibraryName[] = "libEGL.so.1";
+
+const char kGLESv2ANGLELibraryName[] = "libGLESv2.so";
+const char kEGLANGLELibraryName[] = "libEGL.so";
+
+}  // namespace
 
 void GetAllowedGLImplementations(std::vector<GLImplementation>* impls) {
   impls->push_back(kGLImplementationDesktopGL);
@@ -19,11 +53,123 @@
   impls->push_back(kGLImplementationOSMesaGL);
 }
 
+bool InitializeStaticGLBindings(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.
+  DCHECK_EQ(kGLImplementationNone, GetGLImplementation());
+
+  // Allow the main thread or another to initialize these bindings
+  // after instituting restrictions on I/O. Going forward they will
+  // likely be used in the browser process on most platforms. The
+  // one-time initialization cost is small, between 2 and 5 ms.
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
+
+  switch (implementation) {
+    case kGLImplementationOSMesaGL:
+      return InitializeStaticGLBindingsOSMesaGL();
+    case kGLImplementationDesktopGL: {
+      base::NativeLibrary library = NULL;
+      const base::CommandLine* command_line =
+          base::CommandLine::ForCurrentProcess();
+
+      if (command_line->HasSwitch(switches::kTestGLLib))
+        library = LoadLibraryAndPrintError(
+            command_line->GetSwitchValueASCII(switches::kTestGLLib).c_str());
+
+      if (!library) {
+        library = LoadLibraryAndPrintError(kGLLibraryName);
+      }
+
+      if (!library)
+        return false;
+
+      GLGetProcAddressProc get_proc_address =
+          reinterpret_cast<GLGetProcAddressProc>(
+              base::GetFunctionPointerFromNativeLibrary(
+                  library, "glXGetProcAddress"));
+      if (!get_proc_address) {
+        LOG(ERROR) << "glxGetProcAddress not found.";
+        base::UnloadNativeLibrary(library);
+        return false;
+      }
+
+      SetGLGetProcAddressProc(get_proc_address);
+      AddGLNativeLibrary(library);
+      SetGLImplementation(kGLImplementationDesktopGL);
+
+      InitializeStaticGLBindingsGL();
+      InitializeStaticGLBindingsGLX();
+      break;
+    }
+    case kGLImplementationEGLGLES2: {
+      base::FilePath glesv2_path(kGLESv2LibraryName);
+      base::FilePath egl_path(kEGLLibraryName);
+
+      const base::CommandLine* command_line =
+          base::CommandLine::ForCurrentProcess();
+      if (command_line->GetSwitchValueASCII(switches::kUseGL) ==
+          kGLImplementationANGLEName) {
+        base::FilePath module_path;
+        if (!PathService::Get(base::DIR_MODULE, &module_path))
+          return false;
+
+        glesv2_path = module_path.Append(kGLESv2ANGLELibraryName);
+        egl_path = module_path.Append(kEGLANGLELibraryName);
+      }
+
+      base::NativeLibrary gles_library = LoadLibraryAndPrintError(glesv2_path);
+      if (!gles_library)
+        return false;
+      base::NativeLibrary egl_library = LoadLibraryAndPrintError(egl_path);
+      if (!egl_library) {
+        base::UnloadNativeLibrary(gles_library);
+        return false;
+      }
+
+      GLGetProcAddressProc get_proc_address =
+          reinterpret_cast<GLGetProcAddressProc>(
+              base::GetFunctionPointerFromNativeLibrary(
+                  egl_library, "eglGetProcAddress"));
+      if (!get_proc_address) {
+        LOG(ERROR) << "eglGetProcAddress not found.";
+        base::UnloadNativeLibrary(egl_library);
+        base::UnloadNativeLibrary(gles_library);
+        return false;
+      }
+
+      SetGLGetProcAddressProc(get_proc_address);
+      AddGLNativeLibrary(egl_library);
+      AddGLNativeLibrary(gles_library);
+      SetGLImplementation(kGLImplementationEGLGLES2);
+
+      InitializeStaticGLBindingsGL();
+      InitializeStaticGLBindingsEGL();
+
+      // These two functions take single precision float rather than double
+      // precision float parameters in GLES.
+      ::gl::g_driver_gl.fn.glClearDepthFn = MarshalClearDepthToClearDepthf;
+      ::gl::g_driver_gl.fn.glDepthRangeFn = MarshalDepthRangeToDepthRangef;
+      break;
+    }
+    case kGLImplementationMockGL: {
+      SetGLImplementation(kGLImplementationMockGL);
+      InitializeStaticGLBindingsGL();
+      break;
+    }
+    default:
+      return false;
+  }
+
+
+  return true;
+}
+
 bool InitializeDynamicGLBindings(GLImplementation implementation,
     GLContext* context) {
   switch (implementation) {
     case kGLImplementationOSMesaGL:
-    case kGLImplementationDesktopGL:
+   case kGLImplementationDesktopGL:
     case kGLImplementationEGLGLES2:
       InitializeDynamicGLBindingsGL(context);
       break;
@@ -33,15 +179,31 @@
             new GLContextStubWithExtensions());
         mock_context->SetGLVersionString("3.0");
         InitializeDynamicGLBindingsGL(mock_context.get());
-      } else {
+      } else
         InitializeDynamicGLBindingsGL(context);
-      }
       break;
     default:
       return false;
   }
 
   return true;
+}
+
+void InitializeDebugGLBindings() {
+  InitializeDebugGLBindingsEGL();
+  InitializeDebugGLBindingsGL();
+  InitializeDebugGLBindingsGLX();
+  InitializeDebugGLBindingsOSMESA();
+}
+
+void ClearGLBindings() {
+  ClearGLBindingsEGL();
+  ClearGLBindingsGL();
+  ClearGLBindingsGLX();
+  ClearGLBindingsOSMESA();
+  SetGLImplementation(kGLImplementationNone);
+
+  UnloadGLNativeLibraries();
 }
 
 bool GetGLWindowSystemBindingInfo(GLWindowSystemBindingInfo* info) {