X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=theme.lua;h=bbc086a4e86f478dde7c2b66eabe8f64e78a0aee;hb=f006b5b162841dbc764fb620025b87a3272ac79a;hp=d7c281dd3faacb3b62312fe0273e8b8199dc1038;hpb=bd7755947b1c46f046cb9ddcff5bcfbf2d151fa1;p=nageru

diff --git a/theme.lua b/theme.lua
index d7c281d..bbc086a 100644
--- a/theme.lua
+++ b/theme.lua
@@ -333,6 +333,41 @@ function channel_signal(channel)
 	end
 end
 
+-- API ENTRY POINT
+-- Called every frame. Returns the color (if any) to paint around the given
+-- channel. Returns a CSS color (typically to mark live and preview signals);
+-- "transparent" is allowed.
+-- Will never be called for live (0) or preview (1).
+function channel_color(channel)
+	if channel_involved_in(channel, live_signal_num) then
+		return "#f00"
+	end
+	if channel_involved_in(channel, preview_signal_num) then
+		return "#0f0"
+	end
+	return "transparent"
+end
+
+function channel_involved_in(channel, signal_num)
+	if signal_num == INPUT0_SIGNAL_NUM then
+		return channel == 2
+	end
+	if signal_num == INPUT1_SIGNAL_NUM then
+		return channel == 3
+	end
+	if signal_num == SBS_SIGNAL_NUM then
+		return (channel == 2 or channel == 3)
+	end
+	if signal_num == STATIC_SIGNAL_NUM then
+		return (channel == 5)
+	end
+	if signal_num == FADE_SIGNAL_NUM then
+		return (channel_involved_in(channel, fade_src_signal) or
+		        channel_involved_in(channel, fade_dst_signal))
+	end
+	return false
+end
+
 -- API ENTRY POINT
 -- Returns if a given channel supports setting white balance (starting from 2).
 -- Called only once for each channel, at the start of the program.