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// Copyright 2018 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/android/egl_fence_utils.h"
#include "ui/gl/gl_fence_android_native_fence_sync.h"
namespace gl {
base::ScopedFD CreateEglFenceAndExportFd() {
std::unique_ptr<gl::GLFenceAndroidNativeFenceSync> android_native_fence =
gl::GLFenceAndroidNativeFenceSync::CreateForGpuFence();
if (!android_native_fence) {
LOG(ERROR) << "Failed to create android native fence sync object.";
return base::ScopedFD();
}
std::unique_ptr<gfx::GpuFence> gpu_fence =
android_native_fence->GetGpuFence();
if (!gpu_fence) {
LOG(ERROR) << "Unable to get a gpu fence object.";
return base::ScopedFD();
}
gfx::GpuFenceHandle fence_handle = gpu_fence->GetGpuFenceHandle().Clone();
if (fence_handle.is_null()) {
LOG(ERROR) << "Gpu fence handle is null";
return base::ScopedFD();
}
return fence_handle.Release();
}
bool InsertEglFenceAndWait(base::ScopedFD acquire_fence_fd) {
int fence_fd = acquire_fence_fd.release();
// If fence_fd is -1, we do not need synchronization fence and image is ready
// to be used immediately. Also we dont need to close any fd. Else we need to
// create a sync fence which is used to signal when the buffer is ready to be
// consumed.
if (fence_fd == -1)
return true;
// Create attribute-value list with the fence_fd.
EGLint attribs[] = {EGL_SYNC_NATIVE_FENCE_FD_ANDROID, fence_fd, EGL_NONE};
// Create and insert the fence sync gl command using the helper class in
// gl_fence_egl.h. This method takes the ownership of the file descriptor if
// it succeeds.
std::unique_ptr<gl::GLFenceEGL> egl_fence(
gl::GLFenceEGL::Create(EGL_SYNC_NATIVE_FENCE_ANDROID, attribs));
// If above method fails to create an egl_fence, we need to close the file
// descriptor.
if (egl_fence == nullptr) {
// Create a scoped FD to close fence_fd.
base::ScopedFD temp_fd(fence_fd);
LOG(ERROR) << " Failed to created egl fence object ";
return false;
}
// Make the server wait and not the client.
egl_fence->ServerWait();
return true;
}
} // namespace gl
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