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-common.h"
   9 #include "qemu/bswap.h"
  10 #include "qemu/cutils.h"
  11 #include "hw/display/edid.h"
  12
  13 static qemu_edid_info info;
  14
  15 static void usage(FILE *out)
  16 {
  17     fprintf(out,
  18             "\n"
  19             "This is a test tool for the qemu edid generator.\n"
  20             "\n"
  21             "Typically you'll pipe the output into edid-decode\n"
  22             "to check if the generator works correctly.\n"
  23             "\n"
  24             "usage: qemu-edid <options>\n"
  25             "options:\n"
  26             "    -h             print this text\n"
  27             "    -o <file>      set output file (stdout by default)\n"
  28             "    -v <vendor>    set monitor vendor (three letters)\n"
  29             "    -n <name>      set monitor name\n"
  30             "    -s <serial>    set monitor serial\n"
  31             "    -d <dpi>       set display resolution\n"
  32             "    -x <prefx>     set preferred width\n"
  33             "    -y <prefy>     set preferred height\n"
  34             "    -X <maxx>      set maximum width\n"
  35             "    -Y <maxy>      set maximum height\n"
  36             "\n");
  37 }
  38
  39 int main(int argc, char *argv[])
  40 {
  41     FILE *outfile = NULL;
  42     uint8_t blob[256];
  43     int rc;
  44
  45     for (;;) {
  46         rc = getopt(argc, argv, "ho:x:y:X:Y:d:v:n:s:");
  47         if (rc == -1) {
  48             break;
  49         }
  50         switch (rc) {
  51         case 'o':
  52             if (outfile) {
  53                 fprintf(stderr, "outfile specified twice\n");
  54                 exit(1);
  55             }
  56             outfile = fopen(optarg, "w");
  57             if (outfile == NULL) {
  58                 fprintf(stderr, "open %s: %s\n", optarg, strerror(errno));
  59                 exit(1);
  60             }
  61             break;
  62         case 'x':
  63             if (qemu_strtoui(optarg, NULL, 10, &info.prefx) < 0) {
  64                 fprintf(stderr, "not a number: %s\n", optarg);
  65                 exit(1);
  66             }
  67             break;
  68         case 'y':
  69             if (qemu_strtoui(optarg, NULL, 10, &info.prefy) < 0) {
  70                 fprintf(stderr, "not a number: %s\n", optarg);
  71                 exit(1);
  72             }
  73             break;
  74         case 'X':
  75             if (qemu_strtoui(optarg, NULL, 10, &info.maxx) < 0) {
  76                 fprintf(stderr, "not a number: %s\n", optarg);
  77                 exit(1);
  78             }
  79             break;
  80         case 'Y':
  81             if (qemu_strtoui(optarg, NULL, 10, &info.maxy) < 0) {
  82                 fprintf(stderr, "not a number: %s\n", optarg);
  83                 exit(1);
  84             }
  85             break;
  86         case 'd':
  87             if (qemu_strtoui(optarg, NULL, 10, &info.dpi) < 0) {
  88                 fprintf(stderr, "not a number: %s\n", optarg);
  89                 exit(1);
  90             }
  91             break;
  92         case 'v':
  93             info.vendor = optarg;
  94             break;
  95         case 'n':
  96             info.name = optarg;
  97             break;
  98         case 's':
  99             info.serial = optarg;
 100             break;
 101         case 'h':
 102             usage(stdout);
 103             exit(0);
 104         default:
 105             usage(stderr);
 106             exit(1);
 107         }
 108     }
 109
 110     if (outfile == NULL) {
 111         outfile = stdout;
 112     }
 113
 114     memset(blob, 0, sizeof(blob));
 115     qemu_edid_generate(blob, sizeof(blob), &info);
 116     fwrite(blob, sizeof(blob), 1, outfile);
 117     fflush(outfile);
 118
 119     exit(0);
 120 }