DRM backend + Session interface + EGL

CMake/FindGBM.cmake

@@ -0,0 +1,39 @@
+#.rst:
+# FindGBM
+# -------
+#
+# Find GBM library
+#
+# Try to find GBM library on UNIX systems. The following values are defined
+#
+# ::
+#
+#   GBM_FOUND         - True if gbm is available
+#   GBM_INCLUDE_DIRS  - Include directories for gbm
+#   GBM_LIBRARIES     - List of libraries for gbm
+#   GBM_DEFINITIONS   - List of definitions for gbm
+#
+#=============================================================================
+# Copyright (c) 2015 Jari Vetoniemi
+#
+# Distributed under the OSI-approved BSD License (the "License");
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+
+set_package_properties(GBM PROPERTIES
+   URL "http://www.mesa3d.org/"
+   DESCRIPTION "Generic buffer manager")
+
+find_package(PkgConfig)
+pkg_check_modules(PC_GBM QUIET gbm)
+find_library(GBM_LIBRARIES NAMES gbm HINTS ${PC_GBM_LIBRARY_DIRS})
+find_path(GBM_INCLUDE_DIRS gbm.h HINTS ${PC_GBM_INCLUDE_DIRS})
+
+set(GBM_DEFINITIONS ${PC_GBM_CFLAGS_OTHER})
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(GBM DEFAULT_MSG GBM_INCLUDE_DIRS GBM_LIBRARIES)
+mark_as_advanced(GBM_INCLUDE_DIRS GBM_LIBRARIES GBM_DEFINITIONS)

CMake/FindSystemd.cmake

@@ -0,0 +1,40 @@
+#.rst:
+# FindSystemd
+# -------
+#
+# Find Systemd library
+#
+# Try to find Systemd library on UNIX systems. The following values are defined
+#
+# ::
+#
+#   SYSTEMD_FOUND         - True if Systemd is available
+#   SYSTEMD_INCLUDE_DIRS  - Include directories for Systemd
+#   SYSTEMD_LIBRARIES     - List of libraries for Systemd
+#   SYSTEMD_DEFINITIONS   - List of definitions for Systemd
+#
+#=============================================================================
+# Copyright (c) 2015 Jari Vetoniemi
+#
+# Distributed under the OSI-approved BSD License (the "License");
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+
+include(FeatureSummary)
+set_package_properties(Systemd PROPERTIES
+   URL "http://freedesktop.org/wiki/Software/systemd/"
+   DESCRIPTION "System and Service Manager")
+
+find_package(PkgConfig)
+pkg_check_modules(PC_SYSTEMD QUIET libsystemd)
+find_library(SYSTEMD_LIBRARIES NAMES systemd ${PC_SYSTEMD_LIBRARY_DIRS})
+find_path(SYSTEMD_INCLUDE_DIRS systemd/sd-login.h HINTS ${PC_SYSTEMD_INCLUDE_DIRS})
+
+set(SYSTEMD_DEFINITIONS ${PC_SYSTEMD_CFLAGS_OTHER})
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(SYSTEMD DEFAULT_MSG SYSTEMD_INCLUDE_DIRS SYSTEMD_LIBRARIES)
+mark_as_advanced(SYSTEMD_INCLUDE_DIRS SYSTEMD_LIBRARIES SYSTEMD_DEFINITIONS)

CMakeLists.txt

@@ -48,9 +48,10 @@ find_package(WaylandProtocols REQUIRED)
 find_package(EGL REQUIRED)
 find_package(GLESv2 REQUIRED)
 find_package(DRM REQUIRED)
+find_package(GBM REQUIRED)
 find_package(LibInput REQUIRED)
-find_package(Udev)
-find_package(Dbus)
+find_package(Udev REQUIRED)
+find_package(Systemd)
 
 include(Wayland)
 include(Manpage)
@@ -60,5 +61,6 @@ include_directories(include)
 add_subdirectory(backend)
 add_subdirectory(common)
 add_subdirectory(wayland)
+add_subdirectory(session)
 
 add_subdirectory(example)

backend/CMakeLists.txt

@@ -1,17 +1,30 @@
 include_directories(
 	${PROTOCOLS_INCLUDE_DIRS}
 	${WAYLAND_INCLUDE_DIR}
+	${DRM_INCLUDE_DIRS}
 )
 
 add_library(wlr-backend
-    wayland/backend.c
-    wayland/registry.c
-    wayland/wl_seat.c
-    wayland/wl_output.c
+    #wayland/backend.c
+    #wayland/registry.c
+    #wayland/wl_seat.c
+    #wayland/wl_output.c
+    drm/backend.c
+    drm/drm.c
+    drm/udev.c
+    backend.c
+    egl.c
 )
 
 target_link_libraries(wlr-backend
     wlr-common
     wlr-wayland
     ${WAYLAND_LIBRARIES}
+    ${DRM_LIBRARIES}
+    ${GBM_LIBRARIES}
+    ${GLESv2_LIBRARIES}
+    ${EGL_LIBRARIES}
+    ${SYSTEMD_LIBRARIES}
+    ${UDEV_LIBRARIES}
+    ${GBM_LIBRARIES}
 )

backend/backend.c

@@ -0,0 +1,36 @@
+#include <wayland-server.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include "common/log.h"
+#include "backend.h"
+
+struct wlr_backend *wlr_backend_create(const struct wlr_backend_impl *impl,
+		struct wlr_backend_state *state) {
+	struct wlr_backend *backend = calloc(1, sizeof(struct wlr_backend));
+	if (!backend) {
+		wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
+		return NULL;
+	}
+	backend->state = state;
+	backend->impl = impl;
+	wl_signal_init(&backend->events.output_add);
+	wl_signal_init(&backend->events.output_remove);
+	wl_signal_init(&backend->events.keyboard_add);
+	wl_signal_init(&backend->events.keyboard_remove);
+	wl_signal_init(&backend->events.pointer_add);
+	wl_signal_init(&backend->events.pointer_remove);
+	wl_signal_init(&backend->events.touch_add);
+	wl_signal_init(&backend->events.touch_remove);
+	return backend;
+}
+
+bool wlr_backend_init(struct wlr_backend *backend) {
+	return backend->impl->init(backend->state);
+}
+
+void wlr_backend_destroy(struct wlr_backend *backend) {
+	backend->impl->destroy(backend->state);
+	// TODO: free outputs
+	free(backend);
+}

backend/drm/backend.c

@@ -0,0 +1,103 @@
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <wayland-server.h>
+
+#include <wlr/session.h>
+#include <wlr/common/list.h>
+
+#include "backend.h"
+#include "backend/drm/backend.h"
+#include "backend/drm/drm.h"
+#include "backend/drm/udev.h"
+#include "common/log.h"
+
+static bool wlr_drm_backend_init(struct wlr_backend_state *state) {
+	wlr_drm_scan_connectors(state);
+	return true;
+}
+
+static void wlr_drm_backend_destroy(struct wlr_backend_state *state) {
+	if (!state) {
+		return;
+	}
+	// TODO: free outputs in shared backend code
+	wlr_drm_renderer_free(&state->renderer);
+	wlr_udev_free(&state->udev);
+	wlr_session_close_file(state->session, state->fd);
+	wlr_session_finish(state->session);
+	wl_event_source_remove(state->drm_event);
+	free(state);
+}
+
+static struct wlr_backend_impl backend_impl = {
+	.init = wlr_drm_backend_init,
+	.destroy = wlr_drm_backend_destroy
+};
+
+struct wlr_backend *wlr_drm_backend_create(struct wl_display *display,
+		struct wlr_session *session) {
+	struct wlr_backend_state *state = calloc(1, sizeof(struct wlr_backend_state));
+	if (!state) {
+		wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
+		return NULL;
+	}
+
+	struct wlr_backend *backend = wlr_backend_create(&backend_impl, state);
+	if (!backend) {
+		wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
+		return NULL;
+	}
+
+	state->backend = backend;
+	state->session = session;
+	state->outputs = list_create();
+	if (!state->outputs) {
+		wlr_log(L_ERROR, "Failed to allocate list");
+		goto error_backend;
+	}
+
+	if (!wlr_udev_init(display, &state->udev)) {
+		wlr_log(L_ERROR, "Failed to start udev");
+		goto error_list;
+	}
+
+	state->fd = wlr_udev_find_gpu(&state->udev, state->session);
+	if (state->fd == -1) {
+		wlr_log(L_ERROR, "Failed to open DRM device");
+		goto error_udev;
+	}
+
+	struct wl_event_loop *event_loop = wl_display_get_event_loop(display);
+
+	state->drm_event = wl_event_loop_add_fd(event_loop, state->fd,
+		WL_EVENT_READABLE, wlr_drm_event, NULL);
+	if (!state->drm_event) {
+		wlr_log(L_ERROR, "Failed to create DRM event source");
+		goto error_fd;
+	}
+
+	// TODO: what is the difference between the per-output renderer and this
+	// one?
+	if (!wlr_drm_renderer_init(&state->renderer, state->fd)) {
+		wlr_log(L_ERROR, "Failed to initialize renderer");
+		goto error_event;
+	}
+
+	return backend;
+
+error_event:
+	wl_event_source_remove(state->drm_event);
+error_fd:
+	wlr_session_close_file(state->session, state->fd);
+error_udev:
+	wlr_udev_free(&state->udev);
+error_list:
+	list_free(state->outputs);
+error_backend:
+	free(state);
+	free(backend);
+	return NULL;
+}