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 = (qemu_edid_info) {
  13     .prefx = 1024,
  14     .prefy = 768,
  15 };
  16
  17 static void usage(FILE *out)
  18 {
  19     fprintf(out,
  20             "\n"
  21             "This is a test tool for the qemu edid generator.\n"
  22             "\n"
  23             "Typically you'll pipe the output into edid-decode\n"
  24             "to check if the generator works correctly.\n"
  25             "\n"
  26             "usage: qemu-edid <options>\n"
  27             "options:\n"
  28             "    -h             print this text\n"
  29             "    -o <file>      set output file (stdout by default)\n"
  30             "    -v <vendor>    set monitor vendor (three letters)\n"
  31             "    -n <name>      set monitor name\n"
  32             "    -s <serial>    set monitor serial\n"
  33             "    -d <dpi>       set display resolution\n"
  34             "    -x <prefx>     set preferred width\n"
  35             "    -y <prefy>     set preferred height\n"
  36             "    -X <maxx>      set maximum width\n"
  37             "    -Y <maxy>      set maximum height\n"
  38             "\n");
  39 }
  40
  41 int main(int argc, char *argv[])
  42 {
  43     FILE *outfile = NULL;
  44     uint8_t blob[256];
  45     uint32_t dpi = 100;
  46     int rc;
  47
  48     for (;;) {
  49         rc = getopt(argc, argv, "ho:x:y:X:Y:d:v:n:s:");
  50         if (rc == -1) {
  51             break;
  52         }
  53         switch (rc) {
  54         case 'o':
  55             if (outfile) {
  56                 fprintf(stderr, "outfile specified twice\n");
  57                 exit(1);
  58             }
  59             outfile = fopen(optarg, "w");
  60             if (outfile == NULL) {
  61                 fprintf(stderr, "open %s: %s\n", optarg, strerror(errno));
  62                 exit(1);
  63             }
  64             break;
  65         case 'x':
  66             if (qemu_strtoui(optarg, NULL, 10, &info.prefx) < 0) {
  67                 fprintf(stderr, "not a number: %s\n", optarg);
  68                 exit(1);
  69             }
  70             break;
  71         case 'y':
  72             if (qemu_strtoui(optarg, NULL, 10, &info.prefy) < 0) {
  73                 fprintf(stderr, "not a number: %s\n", optarg);
  74                 exit(1);
  75             }
  76             break;
  77         case 'X':
  78             if (qemu_strtoui(optarg, NULL, 10, &info.maxx) < 0) {
  79                 fprintf(stderr, "not a number: %s\n", optarg);
  80                 exit(1);
  81             }
  82             break;
  83         case 'Y':
  84             if (qemu_strtoui(optarg, NULL, 10, &info.maxy) < 0) {
  85                 fprintf(stderr, "not a number: %s\n", optarg);
  86                 exit(1);
  87             }
  88             break;
  89         case 'd':
  90             if (qemu_strtoui(optarg, NULL, 10, &dpi) < 0) {
  91                 fprintf(stderr, "not a number: %s\n", optarg);
  92                 exit(1);
  93             }
  94             break;
  95         case 'v':
  96             info.vendor = optarg;
  97             break;
  98         case 'n':
  99             info.name = optarg;
 100             break;
 101         case 's':
 102             info.serial = optarg;
 103             break;
 104         case 'h':
 105             usage(stdout);
 106             exit(0);
 107         default:
 108             usage(stderr);
 109             exit(1);
 110         }
 111     }
 112
 113     if (outfile == NULL) {
 114         outfile = stdout;
 115     }
 116
 117     info.width_mm = qemu_edid_dpi_to_mm(dpi, info.prefx);
 118     info.height_mm = qemu_edid_dpi_to_mm(dpi, info.prefy);
 119
 120     memset(blob, 0, sizeof(blob));
 121     qemu_edid_generate(blob, sizeof(blob), &info);
 122     fwrite(blob, sizeof(blob), 1, outfile);
 123     fflush(outfile);
 124
 125     exit(0);
 126 }