3 files changed, 41 insertions, 15 deletions

diff --git a/servers/audio_server.cpp b/servers/audio_server.cpp
index a030871754..c3b0de6d9a 100644
--- a/servers/audio_server.cpp
+++ b/servers/audio_server.cpp
@@ -172,6 +172,12 @@ void AudioServer::_driver_process(int p_frames, int32_t *p_buffer) {
 
 	int todo = p_frames;
 
+	if (channel_count != get_channel_count()) {
+		// Amount of channels changed due to a device change
+		// reinitialize the buses channels and buffers
+		init_channels_and_buffers();
+	}
+
 	while (todo) {
 
 		if (to_mix == 0) {
@@ -485,8 +491,8 @@ void AudioServer::set_bus_count(int p_count) {
 		}
 
 		buses[i] = memnew(Bus);
-		buses[i]->channels.resize(get_channel_count());
-		for (int j = 0; j < get_channel_count(); j++) {
+		buses[i]->channels.resize(channel_count);
+		for (int j = 0; j < channel_count; j++) {
 			buses[i]->channels[j].buffer.resize(buffer_size);
 		}
 		buses[i]->name = attempt;
@@ -557,8 +563,8 @@ void AudioServer::add_bus(int p_at_pos) {
 	}
 
 	Bus *bus = memnew(Bus);
-	bus->channels.resize(get_channel_count());
-	for (int j = 0; j < get_channel_count(); j++) {
+	bus->channels.resize(channel_count);
+	for (int j = 0; j < channel_count; j++) {
 		bus->channels[j].buffer.resize(buffer_size);
 	}
 	bus->name = attempt;
@@ -860,17 +866,29 @@ bool AudioServer::is_bus_channel_active(int p_bus, int p_channel) const {
 	return buses[p_bus]->channels[p_channel].active;
 }
 
+void AudioServer::init_channels_and_buffers() {
+	channel_count = get_channel_count();
+	temp_buffer.resize(channel_count);
+
+	for (int i = 0; i < temp_buffer.size(); i++) {
+		temp_buffer[i].resize(buffer_size);
+	}
+
+	for (int i = 0; i < buses.size(); i++) {
+		buses[i]->channels.resize(channel_count);
+		for (int j = 0; j < channel_count; j++) {
+			buses[i]->channels[j].buffer.resize(buffer_size);
+		}
+	}
+}
+
 void AudioServer::init() {
 
 	channel_disable_threshold_db = GLOBAL_DEF("audio/channel_disable_threshold_db", -60.0);
 	channel_disable_frames = float(GLOBAL_DEF("audio/channel_disable_time", 2.0)) * get_mix_rate();
 	buffer_size = 1024; //hardcoded for now
 
-	temp_buffer.resize(get_channel_count());
-
-	for (int i = 0; i < temp_buffer.size(); i++) {
-		temp_buffer[i].resize(buffer_size);
-	}
+	init_channels_and_buffers();
 
 	mix_count = 0;
 	set_bus_count(1);
@@ -1052,8 +1070,8 @@ void AudioServer::set_bus_layout(const Ref<AudioBusLayout> &p_bus_layout) {
 		bus_map[bus->name] = bus;
 		buses[i] = bus;
 
-		buses[i]->channels.resize(get_channel_count());
-		for (int j = 0; j < get_channel_count(); j++) {
+		buses[i]->channels.resize(channel_count);
+		for (int j = 0; j < channel_count; j++) {
 			buses[i]->channels[j].buffer.resize(buffer_size);
 		}
 		_update_bus_effects(i);
@@ -1154,6 +1172,7 @@ AudioServer::AudioServer() {
 	audio_data_max_mem = 0;
 	audio_data_lock = Mutex::create();
 	mix_frames = 0;
+	channel_count = 0;
 	to_mix = 0;
 }
 
diff --git a/servers/audio_server.h b/servers/audio_server.h
index 188d38db94..a8be48b4c3 100644
--- a/servers/audio_server.h
+++ b/servers/audio_server.h
@@ -130,6 +130,7 @@ private:
 	float channel_disable_threshold_db;
 	uint32_t channel_disable_frames;
 
+	int channel_count;
 	int to_mix;
 
 	struct Bus {
@@ -186,6 +187,8 @@ private:
 
 	Mutex *audio_data_lock;
 
+	void init_channels_and_buffers();
+
 	void _mix_step();
 
 	struct CallbackItem {
diff --git a/servers/visual/visual_server_canvas.cpp b/servers/visual/visual_server_canvas.cpp
index 3e6e524117..dd8d07f00d 100644
--- a/servers/visual/visual_server_canvas.cpp
+++ b/servers/visual/visual_server_canvas.cpp
@@ -440,13 +440,17 @@ void VisualServerCanvas::canvas_item_add_polyline(RID p_item, const Vector<Point
 			if (p_antialiased) {
 				pline->line_colors.push_back(Color(1, 1, 1, 1));
 			}
-		}
-		if (p_colors.size() == 1) {
+		} else if (p_colors.size() == 1) {
 			pline->triangle_colors = p_colors;
 			pline->line_colors = p_colors;
 		} else {
-			pline->triangle_colors.resize(pline->triangles.size());
-			pline->line_colors.resize(pline->lines.size());
+			if (p_colors.size() != p_points.size()) {
+				pline->triangle_colors.push_back(p_colors[0]);
+				pline->line_colors.push_back(p_colors[0]);
+			} else {
+				pline->triangle_colors.resize(pline->triangles.size());
+				pline->line_colors.resize(pline->lines.size());
+			}
 		}
 
 		for (int i = 0; i < p_points.size(); i++) {