GUACAMOLE-1302: Add VNC support for forcing lossless compression.
diff --git a/src/protocols/vnc/settings.c b/src/protocols/vnc/settings.c
index 691e708..a476b2c 100644
--- a/src/protocols/vnc/settings.c
+++ b/src/protocols/vnc/settings.c
@@ -91,6 +91,8 @@
"wol-broadcast-addr",
"wol-udp-port",
"wol-wait-time",
+
+ "force-lossless",
NULL
};
@@ -373,6 +375,12 @@
*/
IDX_WOL_WAIT_TIME,
+ /**
+ * "true" if all graphical updates for this connection should use lossless
+ * compresion only, "false" or blank otherwise.
+ */
+ IDX_FORCE_LOSSLESS,
+
VNC_ARGS_COUNT
};
@@ -432,6 +440,11 @@
guac_user_parse_args_int(user, GUAC_VNC_CLIENT_ARGS, argv,
IDX_COLOR_DEPTH, 0);
+ /* Lossless compression */
+ settings->lossless =
+ guac_user_parse_args_boolean(user, GUAC_VNC_CLIENT_ARGS, argv,
+ IDX_FORCE_LOSSLESS, false);
+
#ifdef ENABLE_VNC_REPEATER
/* Set repeater parameters if specified */
settings->dest_host =
diff --git a/src/protocols/vnc/settings.h b/src/protocols/vnc/settings.h
index 6d1c657..76139bd 100644
--- a/src/protocols/vnc/settings.h
+++ b/src/protocols/vnc/settings.h
@@ -77,6 +77,12 @@
*/
bool read_only;
+ /**
+ * Whether all graphical updates for this connection should use lossless
+ * compression only.
+ */
+ bool lossless;
+
#ifdef ENABLE_VNC_REPEATER
/**
* The VNC host to connect to, if using a repeater.
diff --git a/src/protocols/vnc/vnc.c b/src/protocols/vnc/vnc.c
index ade8278..4dcf861 100644
--- a/src/protocols/vnc/vnc.c
+++ b/src/protocols/vnc/vnc.c
@@ -435,6 +435,10 @@
vnc_client->display = guac_common_display_alloc(client,
rfb_client->width, rfb_client->height);
+ /* Use lossless compression only if requested (otherwise, use default
+ * heuristics) */
+ guac_common_display_set_lossless(vnc_client->display, settings->lossless);
+
/* If not read-only, set an appropriate cursor */
if (settings->read_only == 0) {
if (settings->remote_cursor)