// 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 "components/exo/wayland/zwp_linux_dmabuf.h"
#include "base/memory/raw_ptr.h"
#include <drm_fourcc.h>
#include <linux-dmabuf-unstable-v1-server-protocol.h>
#include "base/containers/contains.h"
#include "base/functional/bind.h"
#include "components/exo/buffer.h"
#include "components/exo/display.h"
#include "components/exo/wayland/server_util.h"
#include "components/exo/wayland/wayland_dmabuf_feedback_manager.h"
#include "ui/gfx/buffer_format_util.h"
#include "ui/gfx/linux/drm_util_linux.h"
namespace exo {
namespace wayland {
namespace {
////////////////////////////////////////////////////////////////////////////////
// wl_buffer_interface:
void buffer_destroy(wl_client* client, wl_resource* resource) {
wl_resource_destroy(resource);
}
const struct wl_buffer_interface buffer_implementation = {buffer_destroy};
void HandleBufferReleaseCallback(wl_resource* resource) {
wl_buffer_send_release(resource);
wl_client_flush(wl_resource_get_client(resource));
}
////////////////////////////////////////////////////////////////////////////////
// linux_buffer_params_interface:
struct LinuxBufferParams {
struct Plane {
base::ScopedFD fd;
uint32_t stride;
uint32_t offset;
uint64_t modifier;
};
explicit LinuxBufferParams(WaylandDmabufFeedbackManager* feedback_manager)
: feedback_manager(feedback_manager) {}
const raw_ptr<WaylandDmabufFeedbackManager> feedback_manager;
std::map<uint32_t, Plane> planes;
};
void linux_buffer_params_destroy(wl_client* client, wl_resource* resource) {
wl_resource_destroy(resource);
}
void linux_buffer_params_add(wl_client* client,
wl_resource* resource,
int32_t fd,
uint32_t plane_idx,
uint32_t offset,
uint32_t stride,
uint32_t modifier_hi,
uint32_t modifier_lo) {
LinuxBufferParams* linux_buffer_params =
GetUserDataAs<LinuxBufferParams>(resource);
const uint64_t modifier = (static_cast<uint64_t>(modifier_hi) << 32) | modifier_lo;
LinuxBufferParams::Plane plane{base::ScopedFD(fd), stride, offset, modifier};
bool inserted = linux_buffer_params->planes
.insert(std::make_pair(plane_idx, std::move(plane)))
.second;
if (!inserted) { // The plane was already there.
wl_resource_post_error(resource, ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_PLANE_SET,
"plane already set");
}
}
bool ValidateLinuxBufferParams(wl_resource* resource,
int32_t width,
int32_t height,
gfx::BufferFormat format,
uint32_t flags) {
if (width <= 0 || height <= 0) {
wl_resource_post_error(resource,
ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_INVALID_DIMENSIONS,
"invalid width or height");
return false;
}
if (flags & ZWP_LINUX_BUFFER_PARAMS_V1_FLAGS_INTERLACED) {
wl_resource_post_error(resource,
ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_INCOMPLETE,
"flags not supported");
return false;
}
LinuxBufferParams* linux_buffer_params =
GetUserDataAs<LinuxBufferParams>(resource);
size_t num_planes = linux_buffer_params->planes.size();
if (num_planes == 0) {
wl_resource_post_error(resource,
ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_INCOMPLETE,
"no planes given");
return false;
}
// Validate that we have planes 0..num_planes-1
for (uint32_t i = 0; i < num_planes; ++i) {
if (!base::Contains(linux_buffer_params->planes, i)) {
wl_resource_post_error(resource,
ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_INCOMPLETE,
"missing a plane");
return false;
}
}
// All planes must have the same modifier.
uint64_t modifier = linux_buffer_params->planes[0].modifier;
for (uint32_t i = 1; i < num_planes; ++i) {
if (linux_buffer_params->planes[i].modifier != modifier) {
wl_resource_post_error(resource,
ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_INVALID_FORMAT,
"all planes must have same modifier");
return false;
}
}
return true;
}
wl_resource* create_buffer(wl_client* client,
wl_resource* resource,
uint32_t buffer_id,
int32_t width,
int32_t height,
uint32_t format,
uint32_t flags) {
LinuxBufferParams* linux_buffer_params =
GetUserDataAs<LinuxBufferParams>(resource);
if (!linux_buffer_params->feedback_manager->IsFormatSupported(format)) {
wl_resource_post_error(resource,
ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_INVALID_FORMAT,
"format not supported");
return nullptr;
}
gfx::BufferFormat buffer_format = ui::GetBufferFormatFromFourCCFormat(format);
if (!ValidateLinuxBufferParams(resource, width, height, buffer_format,
flags)) {
return nullptr;
}
gfx::NativePixmapHandle handle;
handle.modifier = linux_buffer_params->planes[0].modifier;
for (uint32_t i = 0; i < linux_buffer_params->planes.size(); ++i) {
auto& plane = linux_buffer_params->planes[i];
handle.planes.emplace_back(plane.stride, plane.offset, 0,
std::move(plane.fd));
}
bool y_invert = (flags & ZWP_LINUX_BUFFER_PARAMS_V1_FLAGS_Y_INVERT) != 0;
std::unique_ptr<Buffer> buffer =
linux_buffer_params->feedback_manager->GetDisplay()
->CreateLinuxDMABufBuffer(gfx::Size(width, height), buffer_format,
std::move(handle), y_invert);
if (!buffer) {
zwp_linux_buffer_params_v1_send_failed(resource);
return nullptr;
}
wl_resource* buffer_resource =
wl_resource_create(client, &wl_buffer_interface, 1, buffer_id);
buffer->set_release_callback(base::BindRepeating(
&HandleBufferReleaseCallback, base::Unretained(buffer_resource)));
SetImplementation(buffer_resource, &buffer_implementation, std::move(buffer));
return buffer_resource;
}
void linux_buffer_params_create(wl_client* client,
wl_resource* resource,
int32_t width,
int32_t height,
uint32_t format,
uint32_t flags) {
wl_resource* buffer_resource =
create_buffer(client, resource, 0, width, height, format, flags);
if (buffer_resource)
zwp_linux_buffer_params_v1_send_created(resource, buffer_resource);
}
void linux_buffer_params_create_immed(wl_client* client,
wl_resource* resource,
uint32_t buffer_id,
int32_t width,
int32_t height,
uint32_t format,
uint32_t flags) {
create_buffer(client, resource, buffer_id, width, height, format, flags);
}
const struct zwp_linux_buffer_params_v1_interface
linux_buffer_params_implementation = {
linux_buffer_params_destroy, linux_buffer_params_add,
linux_buffer_params_create, linux_buffer_params_create_immed};
////////////////////////////////////////////////////////////////////////////////
// linux_dmabuf_interface:
void linux_dmabuf_destroy(wl_client* client, wl_resource* resource) {
wl_resource_destroy(resource);
}
void linux_dmabuf_create_params(wl_client* client,
wl_resource* resource,
uint32_t id) {
WaylandDmabufFeedbackManager* feedback_manager =
GetUserDataAs<WaylandDmabufFeedbackManager>(resource);
std::unique_ptr<LinuxBufferParams> linux_buffer_params =
std::make_unique<LinuxBufferParams>(feedback_manager);
wl_resource* linux_buffer_params_resource =
wl_resource_create(client, &zwp_linux_buffer_params_v1_interface,
wl_resource_get_version(resource), id);
SetImplementation(linux_buffer_params_resource,
&linux_buffer_params_implementation,
std::move(linux_buffer_params));
}
void linux_dmabuf_get_default_feedback(wl_client* client,
wl_resource* dma_buf_resource,
uint32_t feedback_id) {
WaylandDmabufFeedbackManager* feedback_manager =
static_cast<WaylandDmabufFeedbackManager*>(
wl_resource_get_user_data(dma_buf_resource));
feedback_manager->GetDefaultFeedback(client, dma_buf_resource, feedback_id);
}
void linux_dmabuf_get_surface_feedback(wl_client* client,
wl_resource* dma_buf_resource,
uint32_t feedback_id,
wl_resource* surface_resource) {
WaylandDmabufFeedbackManager* feedback_manager =
static_cast<WaylandDmabufFeedbackManager*>(
wl_resource_get_user_data(dma_buf_resource));
feedback_manager->GetSurfaceFeedback(client, dma_buf_resource, feedback_id,
surface_resource);
}
const struct zwp_linux_dmabuf_v1_interface linux_dmabuf_implementation = {
linux_dmabuf_destroy,
linux_dmabuf_create_params,
linux_dmabuf_get_default_feedback,
linux_dmabuf_get_surface_feedback,
};
} // namespace
void bind_linux_dmabuf(wl_client* client,
void* data,
uint32_t version,
uint32_t id) {
WaylandDmabufFeedbackManager* feedback_manager =
static_cast<WaylandDmabufFeedbackManager*>(data);
wl_resource* resource = wl_resource_create(
client, &zwp_linux_dmabuf_v1_interface,
std::min(version, feedback_manager->GetVersionSupportedByPlatform()), id);
wl_resource_set_implementation(resource, &linux_dmabuf_implementation,
feedback_manager, nullptr);
if (wl_resource_get_version(resource) <
ZWP_LINUX_DMABUF_V1_GET_DEFAULT_FEEDBACK_SINCE_VERSION) {
feedback_manager->SendFormatsAndModifiers(resource);
}
}
} // namespace wayland
} // namespace exo
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