Implement an option to remove window decorations

As well as clarity to the implementation there is some flexibilty here
if we might wish to control other video flags.

interface.c

@@ -167,6 +167,7 @@ static unsigned short *spinner_angle, spinner_size;
 
 static int width = DEFAULT_WIDTH, height = DEFAULT_HEIGHT,
     meter_scale = DEFAULT_METER_SCALE;
+static Uint32 video_flags = SDL_RESIZABLE;
 static float scale = DEFAULT_SCALE;
 static pthread_t ph;
 static struct selector selector;
@@ -1507,7 +1508,7 @@ static SDL_Surface* set_size(int w, int h, struct rect *r)
 {
     SDL_Surface *surface;
 
-    surface = SDL_SetVideoMode(w, h, 32, SDL_RESIZABLE);
+    surface = SDL_SetVideoMode(w, h, 32, video_flags);
     if (surface == NULL) {
         fprintf(stderr, "%s\n", SDL_GetError());
         return NULL;
@@ -1789,7 +1790,7 @@ static int parse_geometry(const char *s)
  * error
  */
 
-int interface_start(struct library *lib, const char *geo)
+int interface_start(struct library *lib, const char *geo, bool decor)
 {
     size_t n;
 
@@ -1798,6 +1799,9 @@ int interface_start(struct library *lib, const char *geo)
         return -1;
     }
 
+    if (!decor)
+        video_flags |= SDL_NOFRAME;
+
     for (n = 0; n < ndeck; n++) {
         if (timecoder_monitor_init(&deck[n].timecoder, zoom(SCOPE_SIZE)) == -1)
             return -1;

interface.h

@@ -23,7 +23,7 @@
 #include "deck.h"
 #include "library.h"
 
-int interface_start(struct library *lib, const char *geo);
+int interface_start(struct library *lib, const char *geo, bool decor);
 void interface_stop();
 
 #endif

xwax.1

@@ -86,6 +86,13 @@ to SDL, which may use it to set the display mode, or size of an X window.
 See the
 .B EXAMPLES.
 .TP
+.B \-\-no\-decor
+Request to the window manager to create a 'frameless' window which
+does not have the regular controls such as title bars and buttons.
+This can be useful in conjunction with the
+.B \-g
+flag for dedicated xwax installations.
+.TP
 .B \-h
 Display the help message and default values.
 .SH "ALSA DEVICE OPTIONS"

xwax.c

@@ -80,6 +80,7 @@ static void usage(FILE *fd)
       "  -k             Lock real-time memory into RAM\n"
       "  -q <n>         Real-time priority (0 for no priority, default %d)\n"
       "  -g <s>         Set display geometry (see man page)\n"
+      "  --no-decor     Request a window with no decorations\n"
       "  -h             Display this message to stdout and exit\n\n",
       DEFAULT_PRIORITY);
 
@@ -184,7 +185,7 @@ int main(int argc, char *argv[])
     int rc = -1, n, priority;
     const char *scanner, *geo;
     char *endptr;
-    bool use_mlock;
+    bool use_mlock, decor;
 
     struct library library;
 
@@ -212,6 +213,7 @@ int main(int argc, char *argv[])
 
     ndeck = 0;
     geo = "";
+    decor = true;
     nctl = 0;
     priority = DEFAULT_PRIORITY;
     importer = DEFAULT_IMPORTER;
@@ -501,6 +503,13 @@ int main(int argc, char *argv[])
             argv += 2;
             argc -= 2;
 
+        } else if (!strcmp(argv[0], "--no-decor")) {
+
+            decor = false;
+
+            argv++;
+            argc--;
+
         } else if (!strcmp(argv[0], "-i")) {
 
             /* Importer script for subsequent decks */
@@ -601,7 +610,7 @@ int main(int argc, char *argv[])
         goto out_rt;
     }
 
-    if (interface_start(&library, geo) == -1)
+    if (interface_start(&library, geo, decor) == -1)
         goto out_rt;
 
     if (rig_main() == -1)