+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright (C) 2014 David Herrmann <dh.herrmann@gmail.com>
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-/*
- * Graphics Devices
- * The grdev layer provides generic access to graphics devices. The device
- * types are hidden in the implementation and exported in a generic way. The
- * grdev_session object forms the base layer. It loads, configures and prepares
- * any graphics devices associated with that session. Each session is totally
- * independent of other sessions and can be controlled separately.
- * The target devices on a session are called display. A display always
- * corresponds to a real display regardless how many pipes are needed to drive
- * that display. That is, an exported display might internally be created out
- * of arbitrary combinations of target pipes. However, this is meant as
- * implementation detail and API users must never assume details below the
- * display-level. That is, a display is the most low-level object exported.
- * Therefore, pipe-configuration and any low-level modesetting is hidden from
- * the public API. It is provided by the implementation, and it is the
- * implementation that decides how pipes are driven.
- *
- * The API users are free to ignore specific displays or combine them to create
- * larger screens. This often requires user-configuration so is dictated by
- * policy. The underlying pipe-configuration might be affected by these
- * high-level policies, but is never directly controlled by those. That means,
- * depending on the displays you use, it might affect how underlying resources
- * are assigned. However, users can never directly apply policies to the pipes,
- * but only to displays. In case specific hardware needs quirks on the pipe
- * level, we support that via hwdb, not via public user configuration.
- *
- * Right now, displays are limited to rgb32 memory-mapped framebuffers on the
- * primary plane. However, the grdev implementation can be easily extended to
- * allow more powerful access (including hardware-acceleration for 2D and 3D
- * compositing). So far, this wasn't needed so it is not exposed.
- */
-
-#pragma once
-
-#include <libudev.h>
-#include <stdbool.h>
-#include <stdlib.h>
-#include <systemd/sd-bus.h>
-#include <systemd/sd-event.h>
-#include "util.h"
-
-typedef struct grdev_fb grdev_fb;
-typedef struct grdev_display_target grdev_display_target;
-typedef struct grdev_display grdev_display;
-
-typedef struct grdev_event grdev_event;
-typedef struct grdev_session grdev_session;
-typedef struct grdev_context grdev_context;
-
-enum {
- /* clockwise rotation; we treat this is abelian group Z4 with ADD */
- GRDEV_ROTATE_0 = 0,
- GRDEV_ROTATE_90 = 1,
- GRDEV_ROTATE_180 = 2,
- GRDEV_ROTATE_270 = 3,
-};
-
-enum {
- /* flip states; we treat this as abelian group V4 with XOR */
- GRDEV_FLIP_NONE = 0x0,
- GRDEV_FLIP_HORIZONTAL = 0x1,
- GRDEV_FLIP_VERTICAL = 0x2,
-};
-
-/*
- * Displays
- */
-
-struct grdev_fb {
- uint32_t width;
- uint32_t height;
- uint32_t format;
- int32_t strides[4];
- void *maps[4];
-
- union {
- void *ptr;
- uint64_t u64;
- } data;
-
- void (*free_fn) (void *ptr);
-};
-
-struct grdev_display_target {
- uint32_t x;
- uint32_t y;
- uint32_t width;
- uint32_t height;
- unsigned int rotate;
- unsigned int flip;
- grdev_fb *front;
- grdev_fb *back;
-};
-
-void grdev_display_set_userdata(grdev_display *display, void *userdata);
-void *grdev_display_get_userdata(grdev_display *display);
-
-const char *grdev_display_get_name(grdev_display *display);
-uint32_t grdev_display_get_width(grdev_display *display);
-uint32_t grdev_display_get_height(grdev_display *display);
-
-bool grdev_display_is_enabled(grdev_display *display);
-void grdev_display_enable(grdev_display *display);
-void grdev_display_disable(grdev_display *display);
-
-const grdev_display_target *grdev_display_next_target(grdev_display *display, const grdev_display_target *prev);
-void grdev_display_flip_target(grdev_display *display, const grdev_display_target *target);
-
-#define GRDEV_DISPLAY_FOREACH_TARGET(_display, _t) \
- for ((_t) = grdev_display_next_target((_display), NULL); \
- (_t); \
- (_t) = grdev_display_next_target((_display), (_t)))
-
-/*
- * Events
- */
-
-enum {
- GRDEV_EVENT_DISPLAY_ADD,
- GRDEV_EVENT_DISPLAY_REMOVE,
- GRDEV_EVENT_DISPLAY_CHANGE,
- GRDEV_EVENT_DISPLAY_FRAME,
-};
-
-typedef void (*grdev_event_fn) (grdev_session *session, void *userdata, grdev_event *ev);
-
-struct grdev_event {
- unsigned int type;
- union {
- struct {
- grdev_display *display;
- } display_add, display_remove, display_change;
-
- struct {
- grdev_display *display;
- } display_frame;
- };
-};
-
-/*
- * Sessions
- */
-
-enum {
- GRDEV_SESSION_CUSTOM = (1 << 0),
- GRDEV_SESSION_MANAGED = (1 << 1),
-};
-
-int grdev_session_new(grdev_session **out,
- grdev_context *context,
- unsigned int flags,
- const char *name,
- grdev_event_fn event_fn,
- void *userdata);
-grdev_session *grdev_session_free(grdev_session *session);
-
-DEFINE_TRIVIAL_CLEANUP_FUNC(grdev_session*, grdev_session_free);
-
-bool grdev_session_is_enabled(grdev_session *session);
-void grdev_session_enable(grdev_session *session);
-void grdev_session_disable(grdev_session *session);
-
-void grdev_session_commit(grdev_session *session);
-void grdev_session_restore(grdev_session *session);
-
-void grdev_session_add_drm(grdev_session *session, struct udev_device *ud);
-void grdev_session_remove_drm(grdev_session *session, struct udev_device *ud);
-void grdev_session_hotplug_drm(grdev_session *session, struct udev_device *ud);
-
-/*
- * Contexts
- */
-
-int grdev_context_new(grdev_context **out, sd_event *event, sd_bus *sysbus);
-grdev_context *grdev_context_ref(grdev_context *context);
-grdev_context *grdev_context_unref(grdev_context *context);
-
-DEFINE_TRIVIAL_CLEANUP_FUNC(grdev_context*, grdev_context_unref);
~ianmdlvl / elogind.git / blobdiff