workspace/libs/kephal/outputs/xrandr/edid.h

   1 /*
   2  *   Copyright 2008 Aike J Sommer <dev@aikesommer.name>
   3  *
   4  *   This program is free software; you can redistribute it and/or modify
   5  *   it under the terms of the GNU General Public License as
   6  *   published by the Free Software Foundation; either version 2,
   7  *   or (at your option) any later version.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details
  13  *
  14  *   You should have received a copy of the GNU Library General Public
  15  *   License along with this program; if not, write to the
  16  *   Free Software Foundation, Inc.,
  17  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18  */
  19
  20
  21 #ifndef KEPHAL_EDID_H
  22 #define KEPHAL_EDID_H
  23
  24 #define EDID_HEADER "\x00\xff\xff\xff\xff\xff\xff\x00"
  25 #define EDID_HEADER_SIZE 8
  26 #define EDID_TEST_HEADER(x) (memcmp(x, EDID_HEADER, EDID_HEADER_SIZE) == 0)
  27
  28 #define EDID_VENDOR_START 8
  29 #define EDID_VENDOR_1(x) ('@' + ((x[EDID_VENDOR_START] & 0x7c) >> 2))
  30 #define EDID_VENDOR_2(x) ('@' + ((x[EDID_VENDOR_START] & 0x03) << 3) + ((x[EDID_VENDOR_START + 1] & 0xe0) >> 5))
  31 #define EDID_VENDOR_3(x) ('@' + (x[EDID_VENDOR_START + 1] & 0x1f))
  32
  33 #define EDID_PRODUCT_ID_START (EDID_VENDOR_START + 2)
  34 #define EDID_PRODUCT_ID(x) (x[EDID_PRODUCT_ID_START] | (x[EDID_PRODUCT_ID_START + 1] << 8))
  35
  36 #define EDID_SERIAL_NUMBER_START (EDID_PRODUCT_ID_START + 2)
  37 #define EDID_SERIAL_NUMBER(x) (x[EDID_SERIAL_NUMBER_START] | (x[EDID_SERIAL_NUMBER_START + 1] << 8) | (x[EDID_SERIAL_NUMBER_START + 2] << 16) | (x[EDID_SERIAL_NUMBER_START + 3] << 24))
  38
  39 #endif // KEPHAL_EDID_H
  40