ui: Move gl/ directory out of gfx/, up to ui/.

ui/gfx/gl/gl_fence.cc

-// Copyright (c) 2011 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 "ui/gfx/gl/gl_fence.h"
-
-#include "base/compiler_specific.h"
-#include "ui/gfx/gl/gl_bindings.h"
-#include "ui/gfx/gl/gl_context.h"
-
-namespace {
-
-class GLFenceNVFence: public gfx::GLFence {
- public:
-  GLFenceNVFence() {
-    // What if either of these GL calls fails? TestFenceNV will return true.
-    // See spec:
-    // http://www.opengl.org/registry/specs/NV/fence.txt
-    //
-    // What should happen if TestFenceNV is called for a name before SetFenceNV
-    // is called?
-    //     We generate an INVALID_OPERATION error, and return TRUE.
-    //     This follows the semantics for texture object names before
-    //     they are bound, in that they acquire their state upon binding.
-    //     We will arbitrarily return TRUE for consistency.
-    glGenFencesNV(1, &fence_);
-    glSetFenceNV(fence_, GL_ALL_COMPLETED_NV);
-    glFlush();
-  }
-
-  virtual bool HasCompleted() OVERRIDE {
-    return IsContextLost() || glTestFenceNV(fence_);
-  }
-
- private:
-  ~GLFenceNVFence() {
-    glDeleteFencesNV(1, &fence_);
-  }
-
-  GLuint fence_;
-};
-
-class GLFenceARBSync: public gfx::GLFence {
- public:
-  GLFenceARBSync() {
-    sync_ = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
-    glFlush();
-  }
-
-  virtual bool HasCompleted() OVERRIDE {
-    // Handle the case where FenceSync failed.
-    if (!sync_ || IsContextLost())
-      return true;
-
-    GLsizei length = 0;
-    GLsizei value = 0;
-    glGetSynciv(sync_,
-                GL_SYNC_STATUS,
-                1,  // bufSize
-                &length,
-                &value);
-    return length == 1 && value == GL_SIGNALED;
-  }
-
- private:
-  ~GLFenceARBSync() {
-    glDeleteSync(sync_);
-  }
-
-  GLsync sync_;
-};
-
-}  // namespace
-
-namespace gfx {
-
-GLFence::GLFence() {
-}
-
-GLFence::~GLFence() {
-}
-
-// static
-GLFence* GLFence::Create() {
-  if (gfx::g_GL_NV_fence) {
-    return new GLFenceNVFence();
-  } else if (gfx::g_GL_ARB_sync) {
-    return new GLFenceARBSync();
-  } else {
-    return NULL;
-  }
-}
-
-// static
-bool GLFence::IsContextLost() {
-  if (!gfx::g_GL_ARB_robustness)
-    return false;
-
-  if (!gfx::GLContext::GetCurrent() ||
-      !gfx::GLContext::GetCurrent()->
-          WasAllocatedUsingARBRobustness())
-    return false;
-
-  GLenum status = glGetGraphicsResetStatusARB();
-  return status != GL_NO_ERROR;
-}
-
-}  // namespace gfx