qemu-edid.c

   1 /*
   2  * QEMU EDID test tool.
   3  *
   4  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   5  * See the COPYING file in the top-level directory.
   6  */
   7 #include "qemu/osdep.h"
   8 #include "qemu/bswap.h"
   9 #include "qemu/cutils.h"
  10 #include "hw/display/edid.h"
  11
  12 static qemu_edid_info info;
  13
  14 static void usage(FILE *out)
  15 {
  16     fprintf(out,
  17             "\n"
  18             "This is a test tool for the qemu edid generator.\n"
  19             "\n"
  20             "Typically you'll pipe the output into edid-decode\n"
  21             "to check if the generator works correctly.\n"
  22             "\n"
  23             "usage: qemu-edid <options>\n"
  24             "options:\n"
  25             "    -h             print this text\n"
  26             "    -o <file>      set output file (stdout by default)\n"
  27             "    -v <vendor>    set monitor vendor (three letters)\n"
  28             "    -n <name>      set monitor name\n"
  29             "    -s <serial>    set monitor serial\n"
  30             "    -d <dpi>       set display resolution\n"
  31             "    -x <prefx>     set preferred width\n"
  32             "    -y <prefy>     set preferred height\n"
  33             "    -X <maxx>      set maximum width\n"
  34             "    -Y <maxy>      set maximum height\n"
  35             "\n");
  36 }
  37
  38 int main(int argc, char *argv[])
  39 {
  40     FILE *outfile = NULL;
  41     uint8_t blob[256];
  42     int rc;
  43
  44     for (;;) {
  45         rc = getopt(argc, argv, "ho:x:y:X:Y:d:v:n:s:");
  46         if (rc == -1) {
  47             break;
  48         }
  49         switch (rc) {
  50         case 'o':
  51             if (outfile) {
  52                 fprintf(stderr, "outfile specified twice\n");
  53                 exit(1);
  54             }
  55             outfile = fopen(optarg, "w");
  56             if (outfile == NULL) {
  57                 fprintf(stderr, "open %s: %s\n", optarg, strerror(errno));
  58                 exit(1);
  59             }
  60             break;
  61         case 'x':
  62             if (qemu_strtoui(optarg, NULL, 10, &info.prefx) < 0) {
  63                 fprintf(stderr, "not a number: %s\n", optarg);
  64                 exit(1);
  65             }
  66             break;
  67         case 'y':
  68             if (qemu_strtoui(optarg, NULL, 10, &info.prefy) < 0) {
  69                 fprintf(stderr, "not a number: %s\n", optarg);
  70                 exit(1);
  71             }
  72             break;
  73         case 'X':
  74             if (qemu_strtoui(optarg, NULL, 10, &info.maxx) < 0) {
  75                 fprintf(stderr, "not a number: %s\n", optarg);
  76                 exit(1);
  77             }
  78             break;
  79         case 'Y':
  80             if (qemu_strtoui(optarg, NULL, 10, &info.maxy) < 0) {
  81                 fprintf(stderr, "not a number: %s\n", optarg);
  82                 exit(1);
  83             }
  84             break;
  85         case 'd':
  86             if (qemu_strtoui(optarg, NULL, 10, &info.dpi) < 0) {
  87                 fprintf(stderr, "not a number: %s\n", optarg);
  88                 exit(1);
  89             }
  90             break;
  91         case 'v':
  92             info.vendor = optarg;
  93             break;
  94         case 'n':
  95             info.name = optarg;
  96             break;
  97         case 's':
  98             info.serial = optarg;
  99             break;
 100         case 'h':
 101             usage(stdout);
 102             exit(0);
 103         default:
 104             usage(stderr);
 105             exit(1);
 106         }
 107     }
 108
 109     if (outfile == NULL) {
 110         outfile = stdout;
 111     }
 112
 113     memset(blob, 0, sizeof(blob));
 114     qemu_edid_generate(blob, sizeof(blob), &info);
 115     fwrite(blob, sizeof(blob), 1, outfile);
 116     fflush(outfile);
 117
 118     exit(0);
 119 }