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// Copyright 2019 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_zwp_linux_dmabuf.h"
#include <drm_fourcc.h>
#include <linux-dmabuf-unstable-v1-client-protocol.h>
#include <algorithm>
#include "base/logging.h"
#include "ui/gfx/linux/drm_util_linux.h"
#include "ui/ozone/platform/wayland/host/wayland_buffer_factory.h"
#include "ui/ozone/platform/wayland/host/wayland_connection.h"
namespace ui {
namespace {
constexpr uint32_t kMinVersion = 1;
constexpr uint32_t kMaxVersion = 3;
} // namespace
// static
constexpr char WaylandZwpLinuxDmabuf::kInterfaceName[];
// static
void WaylandZwpLinuxDmabuf::Instantiate(WaylandConnection* connection,
wl_registry* registry,
uint32_t name,
const std::string& interface,
uint32_t version) {
CHECK_EQ(interface, kInterfaceName) << "Expected \"" << kInterfaceName
<< "\" but got \"" << interface << "\"";
auto* buffer_factory = connection->buffer_factory();
if (buffer_factory->wayland_zwp_dmabuf_ ||
!wl::CanBind(interface, version, kMinVersion, kMaxVersion)) {
return;
}
auto zwp_linux_dmabuf = wl::Bind<zwp_linux_dmabuf_v1>(
registry, name, std::min(version, kMaxVersion));
if (!zwp_linux_dmabuf) {
LOG(ERROR) << "Failed to bind zwp_linux_dmabuf_v1";
return;
}
buffer_factory->wayland_zwp_dmabuf_ = std::make_unique<WaylandZwpLinuxDmabuf>(
zwp_linux_dmabuf.release(), connection);
}
WaylandZwpLinuxDmabuf::WaylandZwpLinuxDmabuf(
zwp_linux_dmabuf_v1* zwp_linux_dmabuf,
WaylandConnection* connection)
: zwp_linux_dmabuf_(zwp_linux_dmabuf), connection_(connection) {
static constexpr zwp_linux_dmabuf_v1_listener kDmabufListener = {
.format = &OnFormat,
.modifier = &OnModifiers,
};
zwp_linux_dmabuf_v1_add_listener(zwp_linux_dmabuf_.get(), &kDmabufListener,
this);
// A roundtrip after binding guarantees that the client has received all
// supported formats.
connection_->RoundTripQueue();
}
WaylandZwpLinuxDmabuf::~WaylandZwpLinuxDmabuf() = default;
void WaylandZwpLinuxDmabuf::CreateBuffer(const base::ScopedFD& fd,
const gfx::Size& size,
const std::vector<uint32_t>& strides,
const std::vector<uint32_t>& offsets,
const std::vector<uint64_t>& modifiers,
uint32_t format,
uint32_t planes_count,
wl::OnRequestBufferCallback callback) {
// Params will be destroyed immediately if create_immed is available.
// Otherwise, they will be destroyed after Wayland notifies a new buffer is
// created or failed to be created.
wl::Object<zwp_linux_buffer_params_v1> params(
zwp_linux_dmabuf_v1_create_params(zwp_linux_dmabuf_.get()));
for (size_t i = 0; i < planes_count; i++) {
zwp_linux_buffer_params_v1_add(params.get(), fd.get(), i /* plane id */,
offsets[i], strides[i], modifiers[i] >> 32,
modifiers[i] & UINT32_MAX);
}
// It's possible to avoid waiting until the buffer is created and have it
// immediately. This method is only available since the protocol version 2.
if (CanCreateBufferImmed()) {
wl::Object<wl_buffer> buffer(zwp_linux_buffer_params_v1_create_immed(
params.get(), size.width(), size.height(), format, 0));
std::move(callback).Run(std::move(buffer));
} else {
static constexpr zwp_linux_buffer_params_v1_listener
kLinuxBufferParamsListener = {.created = &OnCreated,
.failed = &OnFailed};
zwp_linux_buffer_params_v1_add_listener(params.get(),
&kLinuxBufferParamsListener, this);
zwp_linux_buffer_params_v1_create(params.get(), size.width(), size.height(),
format, 0);
// Store the |params| with the corresponding |callback| to identify newly
// created buffer and notify the client about it via the |callback|.
pending_params_.emplace(std::move(params), std::move(callback));
}
connection_->Flush();
}
bool WaylandZwpLinuxDmabuf::CanCreateBufferImmed() const {
return wl::get_version_of_object(zwp_linux_dmabuf_.get()) >=
ZWP_LINUX_BUFFER_PARAMS_V1_CREATE_IMMED_SINCE_VERSION;
}
void WaylandZwpLinuxDmabuf::AddSupportedFourCCFormatAndModifier(
uint32_t fourcc_format,
std::optional<uint64_t> modifier) {
// Return on not supported fourcc formats.
if (!IsValidBufferFormat(fourcc_format))
return;
uint64_t format_modifier = modifier.value_or(DRM_FORMAT_MOD_INVALID);
// If the buffer format has already been stored, it must be another supported
// modifier sent by the Wayland compositor.
gfx::BufferFormat format = GetBufferFormatFromFourCCFormat(fourcc_format);
auto it = supported_buffer_formats_with_modifiers_.find(format);
if (it != supported_buffer_formats_with_modifiers_.end()) {
if (format_modifier != DRM_FORMAT_MOD_INVALID)
it->second.emplace_back(format_modifier);
return;
} else {
std::vector<uint64_t> modifiers;
if (format_modifier != DRM_FORMAT_MOD_INVALID)
modifiers.emplace_back(format_modifier);
supported_buffer_formats_with_modifiers_.emplace(format,
std::move(modifiers));
}
}
void WaylandZwpLinuxDmabuf::NotifyRequestCreateBufferDone(
zwp_linux_buffer_params_v1* params,
wl_buffer* new_buffer) {
auto it = std::ranges::find(pending_params_, params, [](const auto& item) {
return item.first.get();
});
CHECK(it != pending_params_.end());
std::move(it->second).Run(wl::Object<wl_buffer>(new_buffer));
pending_params_.erase(it);
connection_->Flush();
}
// static
void WaylandZwpLinuxDmabuf::OnModifiers(void* data,
zwp_linux_dmabuf_v1* linux_dmabuf,
uint32_t format,
uint32_t modifier_hi,
uint32_t modifier_lo) {
if (auto* self = static_cast<WaylandZwpLinuxDmabuf*>(data)) {
uint64_t modifier = static_cast<uint64_t>(modifier_hi) << 32 | modifier_lo;
self->AddSupportedFourCCFormatAndModifier(format, {modifier});
}
}
// static
void WaylandZwpLinuxDmabuf::OnFormat(void* data,
zwp_linux_dmabuf_v1* linux_dmabuf,
uint32_t format) {
if (auto* self = static_cast<WaylandZwpLinuxDmabuf*>(data)) {
self->AddSupportedFourCCFormatAndModifier(format, std::nullopt);
}
}
// static
void WaylandZwpLinuxDmabuf::OnCreated(void* data,
zwp_linux_buffer_params_v1* params,
wl_buffer* new_buffer) {
if (auto* self = static_cast<WaylandZwpLinuxDmabuf*>(data)) {
self->NotifyRequestCreateBufferDone(params, new_buffer);
}
}
// static
void WaylandZwpLinuxDmabuf::OnFailed(void* data,
zwp_linux_buffer_params_v1* params) {
if (auto* self = static_cast<WaylandZwpLinuxDmabuf*>(data)) {
self->NotifyRequestCreateBufferDone(params, nullptr);
}
}
} // namespace ui
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