components/exo/wayland/zwp_linux_dmabuf.cc - chromium/src - Git at Google

 // 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
	// 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