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// Copyright 2021 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/ozone/platform/wayland/host/wayland_buffer_backing.h"
#include "base/check_op.h"
#include "ui/ozone/platform/wayland/host/wayland_buffer_handle.h"
#include "ui/ozone/platform/wayland/host/wayland_connection.h"
namespace ui {
WaylandBufferBacking::WaylandBufferBacking(const WaylandConnection* connection,
uint32_t buffer_id,
const gfx::Size& size,
uint32_t format)
: connection_(connection),
format_(format),
buffer_id_(buffer_id),
size_(size) {
DCHECK(connection_);
DCHECK_NE(buffer_id_, kInvalidBufferId);
}
WaylandBufferBacking::~WaylandBufferBacking() = default;
bool WaylandBufferBacking::UseExplicitSyncRelease() const {
return connection_->SupportsExplicitSync();
}
WaylandBufferHandle* WaylandBufferBacking::EnsureBufferHandle(
WaylandSurface* requestor) {
if (UseExplicitSyncRelease())
requestor = nullptr;
auto& buffer_handle = buffer_handles_[requestor];
if (buffer_handle)
return buffer_handle.get();
// Assign the anonymous handle to the |requestor|.
auto& anonymous_handle = buffer_handles_[nullptr];
if (anonymous_handle) {
buffer_handle.swap(anonymous_handle);
return buffer_handle.get();
}
// The requested wl_buffer object is not requested.
buffer_handle = std::make_unique<WaylandBufferHandle>(this);
// Create wl_buffer associated with the internal Buffer.
RequestBufferHandle(base::BindOnce(&WaylandBufferHandle::OnWlBufferCreated,
buffer_handle->AsWeakPtr()));
return buffer_handle.get();
}
WaylandBufferHandle* WaylandBufferBacking::GetBufferHandle(
WaylandSurface* requestor) {
DCHECK(requestor);
if (UseExplicitSyncRelease()) {
requestor = nullptr;
DCHECK_LE(buffer_handles_.size(), 1u);
}
return buffer_handles_[requestor].get();
}
} // namespace ui
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