Add a new option: -n/--no-window

This option will allow scrcpy to record the stream without display.
Signed-off-by: NRomain Vimont <rom@rom1v.com>

app/src/main.c

@@ -16,6 +16,7 @@ struct args {
     const char *record_filename;
     enum recorder_format record_format;
     SDL_bool fullscreen;
+    SDL_bool no_window;
     SDL_bool help;
     SDL_bool version;
     SDL_bool show_touches;
@@ -57,6 +58,9 @@ static void usage(const char *arg0) {
         "        is preserved.\n"
         "        Default is %d%s.\n"
         "\n"
+        "    -n, --no-window\n"
+        "        Do not show window (only when screen recording is enabled).\n"
+        "\n"
         "    -p, --port port\n"
         "        Set the TCP port the client listens on.\n"
         "        Default is %d.\n"
@@ -260,6 +264,7 @@ static SDL_bool parse_args(struct args *args, int argc, char *argv[]) {
         {"fullscreen",    no_argument,       NULL, 'f'},
         {"help",          no_argument,       NULL, 'h'},
         {"max-size",      required_argument, NULL, 'm'},
+        {"no-window",     no_argument,       NULL, 'n'},
         {"port",          required_argument, NULL, 'p'},
         {"record",        required_argument, NULL, 'r'},
         {"record-format", required_argument, NULL, 'f'},
@@ -269,7 +274,7 @@ static SDL_bool parse_args(struct args *args, int argc, char *argv[]) {
         {NULL,            0,                 NULL, 0  },
     };
     int c;
-    while ((c = getopt_long(argc, argv, "b:c:fF:hm:p:r:s:tTv", long_options, NULL)) != -1) {
+    while ((c = getopt_long(argc, argv, "b:c:fF:hm:np:r:s:tTv", long_options, NULL)) != -1) {
         switch (c) {
             case 'b':
                 if (!parse_bit_rate(optarg, &args->bit_rate)) {
@@ -295,6 +300,9 @@ static SDL_bool parse_args(struct args *args, int argc, char *argv[]) {
                     return SDL_FALSE;
                 }
                 break;
+            case 'n':
+                args->no_window = SDL_TRUE;
+                break;
             case 'p':
                 if (!parse_port(optarg, &args->port)) {
                     return SDL_FALSE;
@@ -321,6 +329,16 @@ static SDL_bool parse_args(struct args *args, int argc, char *argv[]) {
         }
     }
 
+    if (args->no_window && !args->record_filename) {
+        LOGE("-n/--no-window requires screen recording (-r/--record)");
+        return SDL_FALSE;
+    }
+
+    if (args->no_window && args->fullscreen) {
+        LOGE("-f/--fullscreen-window is incompatible with -n/--no-window");
+        return SDL_FALSE;
+    }
+
     int index = optind;
     if (index < argc) {
         LOGE("Unexpected additional argument: %s", argv[index]);
@@ -401,6 +419,7 @@ int main(int argc, char *argv[]) {
         .show_touches = args.show_touches,
         .fullscreen = args.fullscreen,
         .always_on_top = args.always_on_top,
+        .no_window = args.no_window,
     };
     int res = scrcpy(&options) ? 0 : 1;
 

app/src/scrcpy.h

@@ -15,6 +15,7 @@ struct scrcpy_options {
     SDL_bool show_touches;
     SDL_bool fullscreen;
     SDL_bool always_on_top;
+    SDL_bool no_window;
 };
 
 SDL_bool scrcpy(const struct scrcpy_options *options);

app/src/screen.h

@@ -17,6 +17,7 @@ struct screen {
     struct size windowed_window_size;
     SDL_bool has_frame;
     SDL_bool fullscreen;
+    SDL_bool no_window;
 };
 
 #define SCREEN_INITIALIZER {  \
@@ -33,6 +34,7 @@ struct screen {
     },                        \
     .has_frame = SDL_FALSE,   \
     .fullscreen = SDL_FALSE,  \
+    .no_window = SDL_FALSE,   \
 }
 
 // init SDL and set appropriate hints