[PATCH] fbdev: Add an fbdev compositor backend using pixman and evdev
Vasily Khoruzhick
anarsoul at gmail.com
Tue Jan 15 07:13:09 PST 2013
On Tue, Jan 15, 2013 at 5:08 PM, Philip Withnall <philip at tecnocode.co.uk> wrote:
> This is an initial version of an fbdev backend for Weston. I don't
> consider it polished; I'm just looking for rough feedback at the
> moment. The work is also available as a gitorious branch if anyone
> prefers that:
> https://gitorious.org/~pwithnall/weston/pwithnalls-weston/commits/compositor-fbdev
>
> One concern I have is that a lot of the input/evdev code was copied
> verbatim from the rpi backend. It should probably be factored out into
> evdev.c or something.
>
>
> Initial version of a frame buffer backend using pixman to render to fbdev.
> This has been tested against nouveaufb but nothing else. Much of the code
> came straight from the rpi backend (and copyright has been attributed
> accordingly).
>
> The behaviour of this backend on less modern frame buffers has yet to be
> tested.
Hi Philip,
in general it looks OK to me, few notes:
1. It would be nice to use fb memory if there's enough space for 2 framebuffers.
2. You can do pageflip using xres_virtual, yres_virtual, and
xoffset/yoffset from fb_var_screen_info
3. Too much code duplication (evdev part, vt switching), maybe it's
time to unify that code from rpi,drm and fbdev backends?
Regards
Vasily
> Signed-off-by: Philip Withnall <philip at tecnocode.co.uk>
> ---
> configure.ac | 10 +
> src/Makefile.am | 26 +-
> src/compositor-fbdev.c | 828 +++++++++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 863 insertions(+), 1 deletion(-)
> create mode 100644 src/compositor-fbdev.c
>
> diff --git a/configure.ac b/configure.ac
> index 64505dd..57a444b 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -154,6 +154,16 @@ fi
> AM_CONDITIONAL(INSTALL_RPI_COMPOSITOR, test "x$have_bcm_host" = "xyes")
>
>
> +AC_ARG_ENABLE([fbdev-compositor], [ --enable-fbdev-compositor],,
> + enable_fbdev_compositor=yes)
> +AM_CONDITIONAL([ENABLE_FBDEV_COMPOSITOR],
> + [test x$enable_fbdev_compositor = xyes])
> +AS_IF([test x$enable_fbdev_compositor = xyes], [
> + AC_DEFINE([BUILD_FBDEV_COMPOSITOR], [1], [Build the fbdev compositor])
> + PKG_CHECK_MODULES([FBDEV_COMPOSITOR], [libudev >= 136 mtdev >= 1.1.0])
> +])
> +
> +
> AC_ARG_WITH(cairo-glesv2,
> AS_HELP_STRING([--with-cairo-glesv2],
> [Use GLESv2 cairo instead of full GL]))
> diff --git a/src/Makefile.am b/src/Makefile.am
> index cbfa911..efa819d 100644
> --- a/src/Makefile.am
> +++ b/src/Makefile.am
> @@ -84,7 +84,8 @@ module_LTLIBRARIES = \
> $(x11_backend) \
> $(drm_backend) \
> $(wayland_backend) \
> - $(headless_backend)
> + $(headless_backend) \
> + $(fbdev_backend)
>
> # Do not install, since the binary produced via autotools is unusable.
> # The real backend is built by the Android build system.
> @@ -195,6 +196,29 @@ headless_backend_la_CFLAGS = \
> headless_backend_la_SOURCES = compositor-headless.c
> endif
>
> +if ENABLE_FBDEV_COMPOSITOR
> +fbdev_backend = fbdev-backend.la
> +fbdev_backend_la_LDFLAGS = -module -avoid-version
> +fbdev_backend_la_LIBADD = \
> + $(COMPOSITOR_LIBS) \
> + $(FBDEV_COMPOSITOR_LIBS) \
> + ../shared/libshared.la \
> + $(NULL)
> +fbdev_backend_la_CFLAGS = \
> + $(COMPOSITOR_CFLAGS) \
> + $(FBDEV_COMPOSITOR_CFLAGS) \
> + $(PIXMAN_CFLAGS) \
> + $(GCC_CFLAGS) \
> + $(NULL)
> +fbdev_backend_la_SOURCES = \
> + compositor-fbdev.c \
> + tty.c \
> + evdev.c \
> + evdev.h \
> + evdev-touchpad.c \
> + $(NULL)
> +endif
> +
> if ENABLE_DESKTOP_SHELL
> desktop_shell = desktop-shell.la
> desktop_shell_la_LDFLAGS = -module -avoid-version
> diff --git a/src/compositor-fbdev.c b/src/compositor-fbdev.c
> new file mode 100644
> index 0000000..f81534b
> --- /dev/null
> +++ b/src/compositor-fbdev.c
> @@ -0,0 +1,828 @@
> +/*
> + * Copyright © 2008-2011 Kristian Høgsberg
> + * Copyright © 2011 Intel Corporation
> + * Copyright © 2012 Raspberry Pi Foundation
> + * Copyright © 2013 Philip Withnall
> + *
> + * Permission to use, copy, modify, distribute, and sell this software and
> + * its documentation for any purpose is hereby granted without fee, provided
> + * that the above copyright notice appear in all copies and that both that
> + * copyright notice and this permission notice appear in supporting
> + * documentation, and that the name of the copyright holders not be used in
> + * advertising or publicity pertaining to distribution of the software
> + * without specific, written prior permission. The copyright holders make
> + * no representations about the suitability of this software for any
> + * purpose. It is provided "as is" without express or implied warranty.
> + *
> + * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
> + * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
> + * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
> + * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
> + * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
> + * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
> + * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
> + */
> +
> +#define _GNU_SOURCE
> +
> +#include <errno.h>
> +#include <stdlib.h>
> +#include <stdio.h>
> +#include <string.h>
> +#include <math.h>
> +#include <sys/mman.h>
> +#include <sys/types.h>
> +#include <fcntl.h>
> +#include <unistd.h>
> +#include <linux/fb.h>
> +
> +#include <libudev.h>
> +
> +#include "config.h"
> +
> +#include "compositor.h"
> +#include "pixman-renderer.h"
> +#include "evdev.h"
> +
> +/* Enabling this debugging incurs a significant performance hit */
> +#if 0
> +#define DBG(...) \
> + weston_log(__VA_ARGS__)
> +#else
> +#define DBG(...) do {} while (0)
> +#endif
> +
> +struct fbdev_compositor;
> +struct fbdev_output;
> +
> +struct fbdev_output {
> + struct fbdev_compositor *compositor;
> + struct weston_output base;
> +
> + struct weston_mode mode;
> + struct wl_event_source *finish_frame_timer;
> +
> + /* Frame buffer details. */
> + struct fb_fix_screeninfo fixed_info;
> + struct fb_var_screeninfo variable_info;
> + void *fb;
> + size_t fb_len;
> +
> + /* pixman details. */
> + pixman_image_t *hw_surface;
> + pixman_image_t *shadow_surface;
> + void *shadow_buf;
> + uint8_t depth;
> +};
> +
> +struct fbdev_seat {
> + struct weston_seat base;
> + struct wl_list devices_list;
> +
> + struct udev_monitor *udev_monitor;
> + struct wl_event_source *udev_monitor_source;
> + char *seat_id;
> +};
> +
> +struct fbdev_compositor {
> + struct weston_compositor base;
> + uint32_t prev_state;
> +
> + struct udev *udev;
> + struct tty *tty;
> +};
> +
> +struct fbdev_parameters {
> + int tty;
> + char *device;
> +};
> +
> +static inline struct fbdev_output *
> +to_fbdev_output(struct weston_output *base)
> +{
> + return container_of(base, struct fbdev_output, base);
> +}
> +
> +static inline struct fbdev_seat *
> +to_fbdev_seat(struct weston_seat *base)
> +{
> + return container_of(base, struct fbdev_seat, base);
> +}
> +
> +static inline struct fbdev_compositor *
> +to_fbdev_compositor(struct weston_compositor *base)
> +{
> + return container_of(base, struct fbdev_compositor, base);
> +}
> +
> +static void
> +fbdev_output_repaint(struct weston_output *base, pixman_region32_t *damage)
> +{
> + struct fbdev_output *output = to_fbdev_output(base);
> + struct weston_compositor *ec = output->base.compositor;
> + pixman_box32_t *rects;
> + int nrects, i, src_x, src_y, x1, y1, x2, y2, width, height;
> +
> + /* Repaint the damaged region onto the back buffer. */
> + pixman_renderer_output_set_buffer(base, output->shadow_surface);
> + ec->renderer->repaint_output(base, damage);
> +
> + /* Transform and composite onto the frame buffer. */
> + width = pixman_image_get_width(output->shadow_surface);
> + height = pixman_image_get_height(output->shadow_surface);
> + rects = pixman_region32_rectangles(damage, &nrects);
> +
> + for (i = 0; i < nrects; i++) {
> + switch (base->transform) {
> + default:
> + case WL_OUTPUT_TRANSFORM_NORMAL:
> + x1 = rects[i].x1;
> + x2 = rects[i].x2;
> + y1 = rects[i].y1;
> + y2 = rects[i].y2;
> + break;
> + case WL_OUTPUT_TRANSFORM_180:
> + x1 = width - rects[i].x2;
> + x2 = width - rects[i].x1;
> + y1 = height - rects[i].y2;
> + y2 = height - rects[i].y1;
> + break;
> + case WL_OUTPUT_TRANSFORM_90:
> + x1 = height - rects[i].y2;
> + x2 = height - rects[i].y1;
> + y1 = rects[i].x1;
> + y2 = rects[i].x2;
> + break;
> + case WL_OUTPUT_TRANSFORM_270:
> + x1 = rects[i].y1;
> + x2 = rects[i].y2;
> + y1 = width - rects[i].x2;
> + y2 = width - rects[i].x1;
> + break;
> + }
> + src_x = x1;
> + src_y = y1;
> +
> + pixman_image_composite32(PIXMAN_OP_SRC,
> + output->shadow_surface, /* src */
> + NULL /* mask */,
> + output->hw_surface, /* dest */
> + src_x, src_y, /* src_x, src_y */
> + 0, 0, /* mask_x, mask_y */
> + x1, y1, /* dest_x, dest_y */
> + x2 - x1, /* width */
> + y2 - y1 /* height */);
> + }
> +
> + /* Update the damage region. */
> + pixman_region32_subtract(&ec->primary_plane.damage,
> + &ec->primary_plane.damage, damage);
> +
> + /* Schedule the end of the frame. TODO: Sync this to FB clock? */
> + wl_event_source_timer_update(output->finish_frame_timer, 10);
> +}
> +
> +static int
> +finish_frame_handler(void *data)
> +{
> + struct fbdev_output *output = data;
> + uint32_t msec;
> + struct timeval tv;
> +
> + gettimeofday(&tv, NULL);
> + msec = tv.tv_sec * 1000 + tv.tv_usec / 1000;
> + weston_output_finish_frame(&output->base, msec);
> +
> + return 1;
> +}
> +
> +static int
> +fbdev_frame_buffer_create(struct fbdev_output *output, const char *fb_dev)
> +{
> + int retval = -1;
> + int fd = -1;
> +
> + /* Open the frame buffer device. */
> + fd = open (fb_dev, O_RDWR);
> + if (fd < 0) {
> + weston_log("Failed to open frame buffer device ‘%s’: %s\n",
> + fb_dev, strerror(errno));
> + goto err;
> + }
> +
> + /* Grab the screen info. */
> + if (ioctl(fd, FBIOGET_FSCREENINFO, &output->fixed_info) < 0 ||
> + ioctl(fd, FBIOGET_VSCREENINFO, &output->variable_info) < 0) {
> + weston_log("Failed to get frame buffer info: %s\n",
> + strerror(errno));
> + goto err;
> + }
> +
> + /* Map the frame buffer. */
> + output->fb = mmap (NULL, output->fixed_info.smem_len,
> + PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
> + if (output->fb == NULL) {
> + weston_log("Failed to mmap frame buffer: %s\n",
> + strerror(errno));
> + goto err;
> + }
> +
> + /* Success! */
> + output->fb_len = output->fixed_info.smem_len;
> + retval = 0;
> +
> +err:
> + if (fd >= 0)
> + close (fd);
> +
> + return retval;
> +}
> +
> +static void
> +fbdev_frame_buffer_destroy(struct fbdev_output *output)
> +{
> + if (munmap(output->fb, output->fb_len) < 0)
> + weston_log("Failed to munmap frame buffer: %s\n",
> + strerror(errno));
> +
> + output->fb = NULL;
> + output->fb_len = 0;
> +}
> +
> +static void fbdev_output_destroy(struct weston_output *base);
> +
> +static int
> +fbdev_output_create(struct fbdev_compositor *compositor,
> + struct fbdev_parameters *param)
> +{
> + struct fbdev_output *output;
> + pixman_transform_t transform;
> + int shadow_width, shadow_height;
> + int width, height;
> + pixman_format_code_t pixman_format;
> + struct wl_event_loop *loop;
> +
> + output = calloc(1, sizeof *output);
> + if (!output)
> + return -1;
> +
> + output->compositor = compositor;
> +
> + /* Create the frame buffer. */
> + if (fbdev_frame_buffer_create(output, param->device) < 0) {
> + weston_log("Creating frame buffer failed.\n");
> + goto out_free;
> + }
> +
> + /* Check its properties. TODO: Try a bit harder to support other
> + * formats, including setting the preferred format in the hardware. */
> + if (output->variable_info.bits_per_pixel != 32 ||
> + output->variable_info.red.offset != 16 ||
> + output->variable_info.red.length != 8 ||
> + output->variable_info.red.msb_right != 0 ||
> + output->variable_info.green.offset != 8 ||
> + output->variable_info.green.length != 8 ||
> + output->variable_info.green.msb_right != 0 ||
> + output->variable_info.blue.offset != 0 ||
> + output->variable_info.blue.length != 8 ||
> + output->variable_info.blue.msb_right != 0) {
> + weston_log("Frame buffer doesn't support x8r8g8b8 format.\n");
> + goto out_fb;
> + }
> +
> + pixman_format = PIXMAN_x8r8g8b8;
> +
> + output->base.repaint = fbdev_output_repaint;
> + output->base.destroy = fbdev_output_destroy;
> + output->base.assign_planes = NULL;
> + output->base.set_backlight = NULL;
> + output->base.set_dpms = NULL;
> + output->base.switch_mode = NULL;
> +
> + /* only one static mode in list */
> + output->mode.flags =
> + WL_OUTPUT_MODE_CURRENT | WL_OUTPUT_MODE_PREFERRED;
> + output->mode.width = output->variable_info.xres;
> + output->mode.height = output->variable_info.yres;
> + output->mode.refresh = 60000; /* 60kHz, TODO: this is a guess */
> + wl_list_init(&output->base.mode_list);
> + wl_list_insert(&output->base.mode_list, &output->mode.link);
> +
> + output->base.current = &output->mode;
> + output->base.origin = &output->mode;
> + output->base.subpixel = WL_OUTPUT_SUBPIXEL_UNKNOWN;
> + output->base.make = "fbdev";
> + output->base.model = output->fixed_info.id;
> +
> + weston_output_init(&output->base, &compositor->base,
> + 0, 0, output->variable_info.width,
> + output->variable_info.height,
> + WL_OUTPUT_TRANSFORM_NORMAL);
> +
> + /* Create a pixman image to wrap the memory mapped frame buffer. */
> + width = output->variable_info.xres;
> + height = output->variable_info.yres;
> +
> + output->hw_surface =
> + pixman_image_create_bits(pixman_format, width, height,
> + output->fb,
> + output->fixed_info.line_length);
> +
> + pixman_transform_init_identity(&transform);
> + switch (output->base.transform) {
> + default:
> + case WL_OUTPUT_TRANSFORM_NORMAL:
> + shadow_width = width;
> + shadow_height = height;
> + pixman_transform_rotate(&transform,
> + NULL, 0, 0);
> + pixman_transform_translate(&transform, NULL,
> + 0, 0);
> + break;
> + case WL_OUTPUT_TRANSFORM_180:
> + shadow_width = width;
> + shadow_height = height;
> + pixman_transform_rotate(&transform,
> + NULL, -pixman_fixed_1, 0);
> + pixman_transform_translate(NULL, &transform,
> + pixman_int_to_fixed(shadow_width),
> + pixman_int_to_fixed(shadow_height));
> + break;
> + case WL_OUTPUT_TRANSFORM_270:
> + shadow_width = height;
> + shadow_height = width;
> + pixman_transform_rotate(&transform,
> + NULL, 0, pixman_fixed_1);
> + pixman_transform_translate(&transform,
> + NULL,
> + pixman_int_to_fixed(shadow_width),
> + 0);
> + break;
> + case WL_OUTPUT_TRANSFORM_90:
> + shadow_width = height;
> + shadow_height = width;
> + pixman_transform_rotate(&transform,
> + NULL, 0, -pixman_fixed_1);
> + pixman_transform_translate(&transform,
> + NULL,
> + 0,
> + pixman_int_to_fixed(shadow_height));
> + break;
> + }
> + output->shadow_buf = malloc(width * height * (output->variable_info.bits_per_pixel / 8));
> + output->shadow_surface = pixman_image_create_bits(pixman_format, shadow_width, shadow_height,
> + output->shadow_buf, shadow_width * (output->variable_info.bits_per_pixel / 8));
> + /* No need in transform for normal output */
> + if (output->base.transform != WL_OUTPUT_TRANSFORM_NORMAL)
> + pixman_image_set_transform(output->shadow_surface, &transform);
> +
> + if (pixman_renderer_output_create(&output->base) < 0)
> + goto out_output;
> +
> + loop = wl_display_get_event_loop(compositor->base.wl_display);
> + output->finish_frame_timer =
> + wl_event_loop_add_timer(loop, finish_frame_handler, output);
> +
> + wl_list_insert(compositor->base.output_list.prev, &output->base.link);
> +
> + weston_log("fbdev output %d×%d px\n",
> + output->mode.width, output->mode.height);
> + weston_log_continue(STAMP_SPACE "guessing %d Hz and 96 dpi\n",
> + output->mode.refresh / 1000);
> +
> + return 0;
> +
> +out_output:
> + weston_output_destroy(&output->base);
> +out_fb:
> + fbdev_frame_buffer_destroy(output);
> +out_free:
> + free(output);
> +
> + return -1;
> +}
> +
> +static void
> +fbdev_output_destroy(struct weston_output *base)
> +{
> + struct fbdev_output *output = to_fbdev_output(base);
> +
> + DBG("%s\n", __func__);
> +
> + pixman_renderer_output_destroy(base);
> +
> + pixman_image_unref(output->hw_surface);
> + output->hw_surface = NULL;
> +
> + pixman_image_unref(output->shadow_surface);
> + output->shadow_surface = NULL;
> +
> + fbdev_frame_buffer_destroy(output);
> +
> + wl_list_remove(&output->base.link);
> + weston_output_destroy(&output->base);
> +
> + free(output);
> +}
> +
> +static void
> +fbdev_led_update(struct weston_seat *seat_base, enum weston_led leds)
> +{
> + struct fbdev_seat *seat = to_fbdev_seat(seat_base);
> + struct evdev_device *device;
> +
> + wl_list_for_each(device, &seat->devices_list, link)
> + evdev_led_update(device, leds);
> +}
> +
> +static const char default_seat[] = "seat0";
> +
> +static void
> +device_added(struct udev_device *udev_device, struct fbdev_seat *master)
> +{
> + struct evdev_device *device;
> + const char *devnode;
> + const char *device_seat;
> + int fd;
> +
> + device_seat = udev_device_get_property_value(udev_device, "ID_SEAT");
> + if (!device_seat)
> + device_seat = default_seat;
> +
> + if (strcmp(device_seat, master->seat_id))
> + return;
> +
> + devnode = udev_device_get_devnode(udev_device);
> +
> + /* Use non-blocking mode so that we can loop on read on
> + * evdev_device_data() until all events on the fd are
> + * read. mtdev_get() also expects this. */
> + fd = open(devnode, O_RDWR | O_NONBLOCK | O_CLOEXEC);
> + if (fd < 0) {
> + weston_log("opening input device '%s' failed.\n", devnode);
> + return;
> + }
> +
> + device = evdev_device_create(&master->base, devnode, fd);
> + if (!device) {
> + close(fd);
> + weston_log("not using input device '%s'.\n", devnode);
> + return;
> + }
> +
> + wl_list_insert(master->devices_list.prev, &device->link);
> +}
> +
> +static void
> +evdev_add_devices(struct udev *udev, struct weston_seat *seat_base)
> +{
> + struct fbdev_seat *seat = to_fbdev_seat(seat_base);
> + struct udev_enumerate *e;
> + struct udev_list_entry *entry;
> + struct udev_device *device;
> + const char *path, *sysname;
> +
> + e = udev_enumerate_new(udev);
> + udev_enumerate_add_match_subsystem(e, "input");
> + udev_enumerate_scan_devices(e);
> + udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(e)) {
> + path = udev_list_entry_get_name(entry);
> + device = udev_device_new_from_syspath(udev, path);
> +
> + sysname = udev_device_get_sysname(device);
> + if (strncmp("event", sysname, 5) != 0) {
> + udev_device_unref(device);
> + continue;
> + }
> +
> + device_added(device, seat);
> +
> + udev_device_unref(device);
> + }
> + udev_enumerate_unref(e);
> +
> + evdev_notify_keyboard_focus(&seat->base, &seat->devices_list);
> +
> + if (wl_list_empty(&seat->devices_list)) {
> + weston_log(
> + "warning: no input devices on entering Weston. "
> + "Possible causes:\n"
> + "\t- no permissions to read /dev/input/event*\n"
> + "\t- seats misconfigured "
> + "(Weston backend option 'seat', "
> + "udev device property ID_SEAT)\n");
> + }
> +}
> +
> +static int
> +evdev_udev_handler(int fd, uint32_t mask, void *data)
> +{
> + struct fbdev_seat *seat = data;
> + struct udev_device *udev_device;
> + struct evdev_device *device, *next;
> + const char *action;
> + const char *devnode;
> +
> + udev_device = udev_monitor_receive_device(seat->udev_monitor);
> + if (!udev_device)
> + return 1;
> +
> + action = udev_device_get_action(udev_device);
> + if (!action)
> + goto out;
> +
> + if (strncmp("event", udev_device_get_sysname(udev_device), 5) != 0)
> + goto out;
> +
> + if (!strcmp(action, "add")) {
> + device_added(udev_device, seat);
> + }
> + else if (!strcmp(action, "remove")) {
> + devnode = udev_device_get_devnode(udev_device);
> + wl_list_for_each_safe(device, next, &seat->devices_list, link)
> + if (!strcmp(device->devnode, devnode)) {
> + weston_log("input device %s, %s removed\n",
> + device->devname, device->devnode);
> + evdev_device_destroy(device);
> + break;
> + }
> + }
> +
> +out:
> + udev_device_unref(udev_device);
> +
> + return 0;
> +}
> +
> +static int
> +evdev_enable_udev_monitor(struct udev *udev, struct weston_seat *seat_base)
> +{
> + struct fbdev_seat *master = to_fbdev_seat(seat_base);
> + struct wl_event_loop *loop;
> + struct weston_compositor *c = master->base.compositor;
> + int fd;
> +
> + master->udev_monitor = udev_monitor_new_from_netlink(udev, "udev");
> + if (!master->udev_monitor) {
> + weston_log("udev: failed to create the udev monitor\n");
> + return 0;
> + }
> +
> + udev_monitor_filter_add_match_subsystem_devtype(master->udev_monitor,
> + "input", NULL);
> +
> + if (udev_monitor_enable_receiving(master->udev_monitor)) {
> + weston_log("udev: failed to bind the udev monitor\n");
> + udev_monitor_unref(master->udev_monitor);
> + return 0;
> + }
> +
> + loop = wl_display_get_event_loop(c->wl_display);
> + fd = udev_monitor_get_fd(master->udev_monitor);
> + master->udev_monitor_source =
> + wl_event_loop_add_fd(loop, fd, WL_EVENT_READABLE,
> + evdev_udev_handler, master);
> + if (!master->udev_monitor_source) {
> + udev_monitor_unref(master->udev_monitor);
> + return 0;
> + }
> +
> + return 1;
> +}
> +
> +static void
> +evdev_disable_udev_monitor(struct weston_seat *seat_base)
> +{
> + struct fbdev_seat *seat = to_fbdev_seat(seat_base);
> +
> + if (!seat->udev_monitor)
> + return;
> +
> + udev_monitor_unref(seat->udev_monitor);
> + seat->udev_monitor = NULL;
> + wl_event_source_remove(seat->udev_monitor_source);
> + seat->udev_monitor_source = NULL;
> +}
> +
> +static void
> +evdev_input_create(struct weston_compositor *c, struct udev *udev,
> + const char *seat_id)
> +{
> + struct fbdev_seat *seat;
> +
> + seat = malloc(sizeof *seat);
> + if (seat == NULL)
> + return;
> +
> + memset(seat, 0, sizeof *seat);
> + weston_seat_init(&seat->base, c);
> + seat->base.led_update = fbdev_led_update;
> +
> + wl_list_init(&seat->devices_list);
> + seat->seat_id = strdup(seat_id);
> + if (!evdev_enable_udev_monitor(udev, &seat->base)) {
> + free(seat->seat_id);
> + free(seat);
> + return;
> + }
> +
> + evdev_add_devices(udev, &seat->base);
> +}
> +
> +static void
> +evdev_remove_devices(struct weston_seat *seat_base)
> +{
> + struct fbdev_seat *seat = to_fbdev_seat(seat_base);
> + struct evdev_device *device, *next;
> +
> + wl_list_for_each_safe(device, next, &seat->devices_list, link)
> + evdev_device_destroy(device);
> +
> + if (seat->base.seat.keyboard)
> + notify_keyboard_focus_out(&seat->base);
> +}
> +
> +static void
> +evdev_input_destroy(struct weston_seat *seat_base)
> +{
> + struct fbdev_seat *seat = to_fbdev_seat(seat_base);
> +
> + evdev_remove_devices(seat_base);
> + evdev_disable_udev_monitor(&seat->base);
> +
> + weston_seat_release(seat_base);
> + free(seat->seat_id);
> + free(seat);
> +}
> +
> +static void
> +fbdev_compositor_destroy(struct weston_compositor *base)
> +{
> + struct fbdev_compositor *compositor = to_fbdev_compositor(base);
> + struct weston_seat *seat, *next;
> +
> + /* Destroy all inputs. */
> + wl_list_for_each_safe(seat, next, &compositor->base.seat_list, link)
> + evdev_input_destroy(seat);
> +
> + /* Destroy the output. */
> + weston_compositor_shutdown(&compositor->base);
> +
> + /* Chain up. */
> + compositor->base.renderer->destroy(&compositor->base);
> + tty_destroy(compositor->tty);
> +
> + free(compositor);
> +}
> +
> +static void
> +vt_func(struct weston_compositor *base, int event)
> +{
> + struct fbdev_compositor *compositor = to_fbdev_compositor(base);
> + struct weston_seat *seat;
> + struct weston_output *output;
> +
> + switch (event) {
> + case TTY_ENTER_VT:
> + weston_log("entering VT\n");
> + compositor->base.focus = 1;
> + compositor->base.state = compositor->prev_state;
> + weston_compositor_damage_all(&compositor->base);
> + wl_list_for_each(seat, &compositor->base.seat_list, link) {
> + evdev_add_devices(compositor->udev, seat);
> + evdev_enable_udev_monitor(compositor->udev, seat);
> + }
> + break;
> + case TTY_LEAVE_VT:
> + weston_log("leaving VT\n");
> + wl_list_for_each(seat, &compositor->base.seat_list, link) {
> + evdev_disable_udev_monitor(seat);
> + evdev_remove_devices(seat);
> + }
> +
> + compositor->base.focus = 0;
> + compositor->prev_state = compositor->base.state;
> + compositor->base.state = WESTON_COMPOSITOR_SLEEPING;
> +
> + /* If we have a repaint scheduled (from the idle handler), make
> + * sure we cancel that so we don't try to pageflip when we're
> + * vt switched away. The SLEEPING state will prevent
> + * further attemps at repainting. When we switch
> + * back, we schedule a repaint, which will process
> + * pending frame callbacks. */
> +
> + wl_list_for_each(output,
> + &compositor->base.output_list, link) {
> + output->repaint_needed = 0;
> + }
> +
> + break;
> + };
> +}
> +
> +static void
> +fbdev_restore(struct weston_compositor *base)
> +{
> + struct fbdev_compositor *compositor = to_fbdev_compositor(base);
> +
> + tty_reset(compositor->tty);
> +}
> +
> +static void
> +switch_vt_binding(struct wl_seat *seat, uint32_t time, uint32_t key, void *data)
> +{
> + struct fbdev_compositor *ec = data;
> +
> + tty_activate_vt(ec->tty, key - KEY_F1 + 1);
> +}
> +
> +static struct weston_compositor *
> +fbdev_compositor_create(struct wl_display *display, int argc, char *argv[],
> + const char *config_file, struct fbdev_parameters *param)
> +{
> + struct fbdev_compositor *compositor;
> + const char *seat = default_seat;
> + uint32_t key;
> +
> + weston_log("initializing fbdev backend\n");
> +
> + compositor = calloc(1, sizeof *compositor);
> + if (compositor == NULL)
> + return NULL;
> +
> + if (weston_compositor_init(&compositor->base, display, argc, argv,
> + config_file) < 0)
> + goto out_free;
> +
> + compositor->udev = udev_new();
> + if (compositor->udev == NULL) {
> + weston_log("Failed to initialize udev context.\n");
> + goto out_compositor;
> + }
> +
> + /* Set up the TTY. */
> + compositor->tty = tty_create(&compositor->base, vt_func, param->tty);
> + if (!compositor->tty) {
> + weston_log("Failed to initialize tty.\n");
> + goto out_udev;
> + }
> +
> + compositor->base.destroy = fbdev_compositor_destroy;
> + compositor->base.restore = fbdev_restore;
> +
> + compositor->base.focus = 1;
> + compositor->prev_state = WESTON_COMPOSITOR_ACTIVE;
> +
> + for (key = KEY_F1; key < KEY_F9; key++)
> + weston_compositor_add_key_binding(&compositor->base, key,
> + MODIFIER_CTRL | MODIFIER_ALT,
> + switch_vt_binding,
> + compositor);
> +
> + if (pixman_renderer_init(&compositor->base) < 0)
> + goto out_tty;
> +
> + if (fbdev_output_create(compositor, param) < 0)
> + goto out_pixman;
> +
> + evdev_input_create(&compositor->base, compositor->udev, seat);
> +
> + return &compositor->base;
> +
> +out_pixman:
> + compositor->base.renderer->destroy(&compositor->base);
> +
> +out_tty:
> + tty_destroy(compositor->tty);
> +
> +out_udev:
> + udev_unref(compositor->udev);
> +
> +out_compositor:
> + weston_compositor_shutdown(&compositor->base);
> +
> +out_free:
> + free(compositor);
> +
> + return NULL;
> +}
> +
> +WL_EXPORT struct weston_compositor *
> +backend_init(struct wl_display *display, int argc, char *argv[],
> + const char *config_file)
> +{
> + struct fbdev_parameters param = {
> + .tty = 0, /* default to current tty */
> + .device = "/dev/fb0", /* default frame buffer */
> + };
> +
> + const struct weston_option fbdev_options[] = {
> + { WESTON_OPTION_INTEGER, "tty", 0, ¶m.tty },
> + { WESTON_OPTION_STRING, "device", 0, ¶m.device },
> + };
> +
> + parse_options(fbdev_options, ARRAY_LENGTH(fbdev_options), argc, argv);
> +
> + return fbdev_compositor_create(display, argc, argv, config_file,
> + ¶m);
> +}
> --
> 1.7.11.7
>
>
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> wayland-devel at lists.freedesktop.org
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