diff options
Diffstat (limited to 'plugins/wacom/gsd-wacom-oled-helper.c')
| -rw-r--r-- | plugins/wacom/gsd-wacom-oled-helper.c | 422 |
1 files changed, 422 insertions, 0 deletions
diff --git a/plugins/wacom/gsd-wacom-oled-helper.c b/plugins/wacom/gsd-wacom-oled-helper.c new file mode 100644 index 0000000..86f2891 --- /dev/null +++ b/plugins/wacom/gsd-wacom-oled-helper.c @@ -0,0 +1,422 @@ +/* + * Copyright (C) 2012 Przemo Firszt <przemo@firszt.eu> + * + * The code is derived from gsd-wacom-led-helper.c + * written by: + * Copyright (C) 2010-2011 Richard Hughes <richard@hughsie.com> + * Copyright (C) 2012 Bastien Nocera <hadess@hadess.net> + * + * Licensed under the GNU General Public License Version 2 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ +#include <unistd.h> + +#include <stdlib.h> +#include "config.h" + +#include <glib.h> +#include <locale.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <gudev/gudev.h> + +#include "gsd-wacom-oled-constants.h" + +#define USB_PIXELS_PER_BYTE 2 +#define BT_PIXELS_PER_BYTE 8 +#define USB_BUF_LEN OLED_HEIGHT * OLED_WIDTH / USB_PIXELS_PER_BYTE +#define BT_BUF_LEN OLED_WIDTH * OLED_HEIGHT / BT_PIXELS_PER_BYTE + +static void +oled_scramble_icon (guchar *image) +{ + guchar buf[USB_BUF_LEN]; + int x, y, i; + guchar l1, l2, h1, h2; + + for (i = 0; i < USB_BUF_LEN; i++) + buf[i] = image[i]; + + for (y = 0; y < (OLED_HEIGHT / 2); y++) { + for (x = 0; x < (OLED_WIDTH / 2); x++) { + l1 = (0x0F & (buf[OLED_HEIGHT - 1 - x + OLED_WIDTH * y])); + l2 = (0x0F & (buf[OLED_HEIGHT - 1 - x + OLED_WIDTH * y] >> 4)); + h1 = (0xF0 & (buf[OLED_WIDTH - 1 - x + OLED_WIDTH * y] << 4)); + h2 = (0xF0 & (buf[OLED_WIDTH - 1 - x + OLED_WIDTH * y])); + + image[2 * x + OLED_WIDTH * y] = h1 | l1; + image[2 * x + 1 + OLED_WIDTH * y] = h2 | l2; + } + } +} + +static void +oled_bt_scramble_icon (guchar *input_image) +{ + unsigned char image[BT_BUF_LEN]; + unsigned mask; + unsigned s1; + unsigned s2; + unsigned r1 ; + unsigned r2 ; + unsigned r; + unsigned char buf[256]; + int i, w, x, y, z; + + for (i = 0; i < BT_BUF_LEN; i++) + image[i] = input_image[i]; + + for (x = 0; x < 32; x++) { + for (y = 0; y < 8; y++) + buf[(8 * x) + (7 - y)] = image[(8 * x) + y]; + } + + /* Change 76543210 into GECA6420 as required by Intuos4 WL + * HGFEDCBA HFDB7531 + */ + for (x = 0; x < 4; x++) { + for (y = 0; y < 4; y++) { + for (z = 0; z < 8; z++) { + mask = 0x0001; + r1 = 0; + r2 = 0; + i = (x << 6) + (y << 4) + z; + s1 = buf[i]; + s2 = buf[i+8]; + for (w = 0; w < 8; w++) { + r1 |= (s1 & mask); + r2 |= (s2 & mask); + s1 <<= 1; + s2 <<= 1; + mask <<= 2; + } + r = r1 | (r2 << 1); + i = (x << 6) + (y << 4) + (z << 1); + image[i] = 0xFF & r; + image[i+1] = (0xFF00 & r) >> 8; + } + } + } + for (i = 0; i < BT_BUF_LEN; i++) + input_image[i] = image[i]; +} + +static void +gsd_wacom_oled_convert_1_bit (guchar *image) +{ + guchar buf[BT_BUF_LEN]; + guchar b0, b1, b2, b3, b4, b5, b6, b7; + int i; + + for (i = 0; i < BT_BUF_LEN; i++) { + b0 = 0b10000000 & (image[(4 * i) + 0] >> 0); + b1 = 0b01000000 & (image[(4 * i) + 0] << 3); + b2 = 0b00100000 & (image[(4 * i) + 1] >> 2); + b3 = 0b00010000 & (image[(4 * i) + 1] << 1); + b4 = 0b00001000 & (image[(4 * i) + 2] >> 4); + b5 = 0b00000100 & (image[(4 * i) + 2] >> 1); + b6 = 0b00000010 & (image[(4 * i) + 3] >> 6); + b7 = 0b00000001 & (image[(4 * i) + 3] >> 3); + buf[i] = b0 | b1 | b2 | b3 | b4 | b5 | b6 | b7; + } + for (i = 0; i < BT_BUF_LEN; i++) + image[i] = buf[i]; +} + +static int +gsd_wacom_oled_prepare_buf (guchar *image, GsdWacomOledType type) +{ + int len = 0; + + switch (type) { + case GSD_WACOM_OLED_TYPE_USB: + /* Image has to be scrambled for devices connected over USB ... */ + oled_scramble_icon (image); + len = USB_BUF_LEN; + break; + case GSD_WACOM_OLED_TYPE_BLUETOOTH: + /* ... but for bluetooth it has to be converted to 1 bit colour instead of scrambling */ + gsd_wacom_oled_convert_1_bit (image); + len = BT_BUF_LEN; + break; + case GSD_WACOM_OLED_TYPE_RAW_BLUETOOTH: + /* Image has also to be scrambled for devices connected over BT using the raw API ... */ + gsd_wacom_oled_convert_1_bit (image); + len = BT_BUF_LEN; + oled_bt_scramble_icon (image); + break; + default: + g_assert_not_reached (); + } + + return len; +} + +static gboolean +gsd_wacom_oled_helper_write (const gchar *filename, gchar *buffer, GsdWacomOledType type, GError **error) +{ + guchar *image; + gint retval; + gsize length; + gint fd = -1; + gboolean ret = TRUE; + + fd = open (filename, O_WRONLY); + if (fd < 0) { + ret = FALSE; + g_set_error (error, 1, 0, "Failed to open filename: %s", filename); + goto out; + } + + image = g_base64_decode (buffer, &length); + if (length != USB_BUF_LEN) { + ret = FALSE; + g_set_error (error, 1, 0, "Base64 buffer has length of %" G_GSIZE_FORMAT " (expected %i)", length, USB_BUF_LEN); + goto out; + } + if (!image) { + ret = FALSE; + g_set_error (error, 1, 0, "Decoding base64 buffer failed"); + goto out; + } + + length = gsd_wacom_oled_prepare_buf (image, type); + if (!length) { + ret = FALSE; + g_set_error (error, 1, 0, "Invalid image buffer length"); + goto out; + } + + retval = write (fd, image, length); + if (retval != length) { + ret = FALSE; + g_set_error (error, 1, 0, "Writing to %s failed", filename); + } + + g_free (image); +out: + if (fd >= 0) + close (fd); + return ret; +} + +static char * +get_oled_sysfs_path (GUdevDevice *device, + int button_num) +{ + char *status; + char *filename; + + status = g_strdup_printf ("button%d_rawimg", button_num); + filename = g_build_filename (g_udev_device_get_sysfs_path (device), "wacom_led", status, NULL); + g_free (status); + + return filename; +} + +static char * +get_bt_oled_sysfs_path (GUdevDevice *device, int button_num) +{ + char *status; + char *filename; + + status = g_strdup_printf ("/oled%i_img", button_num); + filename = g_build_filename (g_udev_device_get_sysfs_path (device), status, NULL); + g_free (status); + return filename; +} + +static char * +get_bt_oled_filename (GUdevClient *client, GUdevDevice *device, int button_num) +{ + GUdevDevice *hid_dev; + const char *dev_uniq; + GList *hid_list; + GList *element; + const char *dev_hid_uniq; + char *filename = NULL; + + dev_uniq = g_udev_device_get_property (device, "UNIQ"); + + hid_list = g_udev_client_query_by_subsystem (client, "hid"); + element = g_list_first(hid_list); + while (element) { + hid_dev = (GUdevDevice*)element->data; + dev_hid_uniq = g_udev_device_get_property (hid_dev, "HID_UNIQ"); + if (g_strrstr (dev_uniq, dev_hid_uniq)){ + filename = get_bt_oled_sysfs_path (hid_dev, button_num); + g_object_unref (hid_dev); + break; + } + g_object_unref (hid_dev); + element = g_list_next(element); + } + g_list_free(hid_list); + return filename; +} + +static char * +get_oled_sys_path (GUdevClient *client, + GUdevDevice *device, + int button_num, + gboolean usb, + GsdWacomOledType *type) +{ + GUdevDevice *parent; + char *filename = NULL; + + /* check for new unified hid implementation first */ + parent = g_udev_device_get_parent_with_subsystem (device, "hid", NULL); + if (parent) { + filename = get_oled_sysfs_path (parent, button_num); + g_object_unref (parent); + if(g_file_test (filename, G_FILE_TEST_EXISTS)) { + *type = usb ? GSD_WACOM_OLED_TYPE_USB : GSD_WACOM_OLED_TYPE_RAW_BLUETOOTH; + return filename; + } + g_clear_pointer (&filename, g_free); + } + + /* old kernel */ + if (usb) { + parent = g_udev_device_get_parent_with_subsystem (device, "usb", "usb_interface"); + if (!parent) + goto no_parent; + + filename = get_oled_sysfs_path (parent, button_num); + *type = GSD_WACOM_OLED_TYPE_USB; + } else if (g_strrstr (g_udev_device_get_property (device, "DEVPATH"), "bluetooth")) { + parent = g_udev_device_get_parent_with_subsystem (device, "input", NULL); + if (!parent) + goto no_parent; + + filename = get_bt_oled_filename (client, parent, button_num); + *type = GSD_WACOM_OLED_TYPE_BLUETOOTH; + } else { + g_critical ("Not an expected device: '%s'", + g_udev_device_get_device_file (device)); + goto out_err; + } + + g_object_unref (parent); + + return filename; + +no_parent: + g_debug ("Could not find proper parent device for '%s'", + g_udev_device_get_device_file (device)); + +out_err: + return NULL; +} + + +int main (int argc, char **argv) +{ + GOptionContext *context; + GUdevClient *client; + GUdevDevice *device; + int uid, euid; + char *filename; + GError *error = NULL; + const char * const subsystems[] = { "input", NULL }; + int ret = 1; + gboolean usb; + GsdWacomOledType type; + + char *path = NULL; + char *buffer = NULL; + int button_num = -1; + + const GOptionEntry options[] = { + { "path", '\0', 0, G_OPTION_ARG_FILENAME, &path, "Device path for the Wacom device", NULL }, + { "buffer", '\0', 0, G_OPTION_ARG_STRING, &buffer, "Image to set base64 encoded", NULL }, + { "button", '\0', 0, G_OPTION_ARG_INT, &button_num, "Which button icon to set", NULL }, + { NULL} + }; + + /* get calling process */ + uid = getuid (); + euid = geteuid (); + if (uid != 0 || euid != 0) { + g_print ("This program can only be used by the root user\n"); + return 1; + } + + context = g_option_context_new (NULL); + g_option_context_set_summary (context, "GNOME Settings Daemon Wacom OLED Icon Helper"); + g_option_context_add_main_entries (context, options, NULL); + g_option_context_parse (context, &argc, &argv, NULL); + + if (path == NULL || + button_num < 0 || + buffer == NULL) { + char *txt; + + txt = g_option_context_get_help (context, FALSE, NULL); + g_print ("%s", txt); + g_free (txt); + + g_option_context_free (context); + + return 1; + } + g_option_context_free (context); + + client = g_udev_client_new (subsystems); + device = g_udev_client_query_by_device_file (client, path); + if (device == NULL) { + g_critical ("Could not find device '%s' in udev database", path); + goto out; + } + + if (g_udev_device_get_property_as_boolean (device, "ID_INPUT_TABLET") == FALSE && + g_udev_device_get_property_as_boolean (device, "ID_INPUT_TOUCHPAD") == FALSE) { + g_critical ("Device '%s' is not a Wacom tablet", path); + goto out; + } + + if (g_strcmp0 (g_udev_device_get_property (device, "ID_BUS"), "usb") != 0) + usb = FALSE; + else + usb = TRUE; + + filename = get_oled_sys_path (client, device, button_num, usb, &type); + if (!filename) + goto out; + + if (gsd_wacom_oled_helper_write (filename, buffer, type, &error) == FALSE) { + g_critical ("Could not set OLED icon for '%s': %s", path, error->message); + g_error_free (error); + g_free (filename); + goto out; + } + g_free (filename); + + g_debug ("Successfully set OLED icon for '%s', button %d", path, button_num); + + ret = 0; + +out: + g_free (path); + g_free (buffer); + + g_clear_object (&device); + g_clear_object (&client); + + return ret; +} |