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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 "build/build_config.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_implementation.h"
#include "ui/gl/gl_version_info.h"
#if defined(OS_MACOSX)
#include "ui/gl/gl_fence_apple.h"
#endif
namespace gl {
GLFence::GLFence() {
}
GLFence::~GLFence() {
}
bool GLFence::IsSupported() {
DCHECK(g_current_gl_version && g_current_gl_driver);
return g_current_gl_driver->ext.b_GL_ARB_sync ||
g_current_gl_version->is_es3 ||
g_current_gl_version->is_desktop_core_profile ||
#if defined(OS_MACOSX)
g_current_gl_driver->ext.b_GL_APPLE_fence ||
#else
g_driver_egl.ext.b_EGL_KHR_fence_sync ||
#endif
g_current_gl_driver->ext.b_GL_NV_fence;
}
GLFence* GLFence::Create() {
DCHECK(GLContext::GetCurrent())
<< "Trying to create fence with no context";
std::unique_ptr<GLFence> fence;
#if !defined(OS_MACOSX)
if (g_driver_egl.ext.b_EGL_KHR_fence_sync &&
g_driver_egl.ext.b_EGL_KHR_wait_sync) {
// Prefer GLFenceEGL which doesn't require GL context switching.
fence.reset(new GLFenceEGL);
} else
#endif
if (g_current_gl_driver->ext.b_GL_ARB_sync ||
g_current_gl_version->is_es3 ||
g_current_gl_version->is_desktop_core_profile) {
// Prefer ARB_sync which supports server-side wait.
fence.reset(new GLFenceARB);
#if defined(OS_MACOSX)
} else if (g_current_gl_driver->ext.b_GL_APPLE_fence) {
fence.reset(new GLFenceAPPLE);
#else
} else if (g_driver_egl.ext.b_EGL_KHR_fence_sync) {
fence.reset(new GLFenceEGL);
#endif
} else if (g_current_gl_driver->ext.b_GL_NV_fence) {
fence.reset(new GLFenceNV);
}
DCHECK_EQ(!!fence.get(), GLFence::IsSupported());
return fence.release();
}
bool GLFence::ResetSupported() {
// Resetting a fence to its original state isn't supported by default.
return false;
}
void GLFence::ResetState() {
NOTIMPLEMENTED();
}
void GLFence::Invalidate() {
NOTIMPLEMENTED();
}
} // namespace gl
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