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// Copyright 2012 The Chromium Authors
// 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_context_egl.h"
#include "ui/gl/gl_display.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_surface_egl.h"
#include "ui/gl/gl_version_info.h"
#if BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_LINUX)
#define USE_GL_FENCE_ANDROID_NATIVE_FENCE_SYNC
#include "ui/gl/gl_fence_android_native_fence_sync.h"
#endif
#if BUILDFLAG(IS_WIN)
#include "ui/gl/gl_fence_win.h"
#endif
namespace gl {
GLFence::GLFence() {
}
GLFence::~GLFence() {
}
bool GLFence::IsSupported() {
DCHECK(g_current_gl_version && g_current_gl_driver);
GLDisplayEGL* display = GLDisplayEGL::GetDisplayForCurrentContext();
return g_current_gl_version->is_es3 ||
(display && display->ext->b_EGL_KHR_fence_sync) ||
g_current_gl_driver->ext.b_GL_NV_fence;
}
std::unique_ptr<GLFence> GLFence::Create() {
DCHECK(GLContext::GetCurrent())
<< "Trying to create fence with no context";
std::unique_ptr<GLFence> fence;
GLDisplayEGL* display = GLDisplayEGL::GetDisplayForCurrentContext();
if (display && display->ext->b_EGL_KHR_fence_sync &&
display->ext->b_EGL_KHR_wait_sync) {
// Prefer GLFenceEGL which doesn't require GL context switching.
fence = GLFenceEGL::Create();
DCHECK(fence);
DCHECK(GLFence::IsSupported());
return fence;
}
if (g_current_gl_version->is_es3) {
// Prefer ARB_sync which supports server-side wait.
fence = std::make_unique<GLFenceARB>();
DCHECK(fence);
#if !BUILDFLAG(IS_APPLE)
} else if (display && display->ext->b_EGL_KHR_fence_sync) {
fence = GLFenceEGL::Create();
DCHECK(fence);
#endif // IS_APPLE
} else if (g_current_gl_driver->ext.b_GL_NV_fence) {
fence = std::make_unique<GLFenceNV>();
DCHECK(fence);
}
DCHECK_EQ(!!fence.get(), GLFence::IsSupported());
return fence;
}
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();
}
bool GLFence::IsGpuFenceSupported() {
#if defined(USE_GL_FENCE_ANDROID_NATIVE_FENCE_SYNC)
return gl::GLSurfaceEGL::GetGLDisplayEGL()
->IsAndroidNativeFenceSyncSupported();
#elif BUILDFLAG(IS_WIN)
return gl::GLFenceWin::IsSupported();
#else
return false;
#endif
}
// static
std::unique_ptr<GLFence> GLFence::CreateFromGpuFence(
const gfx::GpuFence& gpu_fence) {
DCHECK(IsGpuFenceSupported());
#if defined(USE_GL_FENCE_ANDROID_NATIVE_FENCE_SYNC)
return GLFenceAndroidNativeFenceSync::CreateFromGpuFence(gpu_fence);
#elif BUILDFLAG(IS_WIN)
return GLFenceWin::CreateFromGpuFence(gpu_fence);
#else
NOTREACHED();
#endif
}
// static
std::unique_ptr<GLFence> GLFence::CreateForGpuFence() {
DCHECK(IsGpuFenceSupported());
#if defined(USE_GL_FENCE_ANDROID_NATIVE_FENCE_SYNC)
return GLFenceAndroidNativeFenceSync::CreateForGpuFence();
#elif BUILDFLAG(IS_WIN)
return GLFenceWin::CreateForGpuFence();
#else
NOTREACHED();
#endif
}
std::unique_ptr<gfx::GpuFence> GLFence::GetGpuFence() {
return nullptr;
}
} // namespace gl
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