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// 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 "ui/gl/gl_fence.h"
#include "base/compiler_specific.h"
#include "ui/gl/gl_bindings.h"
#include "ui/gl/gl_context.h"
#include "ui/gl/gl_fence_arb.h"
#include "ui/gl/gl_fence_egl.h"
#include "ui/gl/gl_fence_nv.h"
#include "ui/gl/gl_gl_api_implementation.h"
#include "ui/gl/gl_version_info.h"
#if defined(OS_MACOSX)
#include "ui/gl/gl_fence_apple.h"
#endif
namespace gfx {
namespace {
// static
GLFence* CreateFence(bool flush) {
DCHECK(GLContext::GetCurrent())
<< "Trying to create fence with no context";
scoped_ptr<GLFence> fence;
// Prefer ARB_sync which supports server-side wait.
if (g_driver_gl.ext.b_GL_ARB_sync ||
GetGLVersionInfo()->is_es3) {
fence.reset(new GLFenceARB(flush));
#if defined(OS_MACOSX)
} else if (g_driver_gl.ext.b_GL_APPLE_fence) {
fence.reset(new GLFenceAPPLE(flush));
#else
} else if (g_driver_egl.ext.b_EGL_KHR_fence_sync) {
fence.reset(new GLFenceEGL(flush));
#endif
} else if (g_driver_gl.ext.b_GL_NV_fence) {
fence.reset(new GLFenceNV(flush));
}
DCHECK_EQ(!!fence.get(), GLFence::IsSupported());
return fence.release();
}
} // namespace
GLFence::GLFence() {
}
GLFence::~GLFence() {
}
bool GLFence::IsSupported() {
DCHECK(GetGLVersionInfo());
return g_driver_gl.ext.b_GL_ARB_sync || GetGLVersionInfo()->is_es3 ||
#if defined(OS_MACOSX)
g_driver_gl.ext.b_GL_APPLE_fence ||
#else
g_driver_egl.ext.b_EGL_KHR_fence_sync ||
#endif
g_driver_gl.ext.b_GL_NV_fence;
}
GLFence* GLFence::Create() {
return CreateFence(true);
}
GLFence* GLFence::CreateWithoutFlush() {
return CreateFence(false);
}
} // namespace gfx
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