X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=theme.lua;h=495f1fc3cbff2d752c36e504ef00a7081d7b6354;hb=e45ebd282e3c6c369475ef0987945eca62ef8f58;hp=04195f28f7d58f707cba5e8ec7ab5a109c290f1e;hpb=52e243fee63f15d7cc57ec24b72bcef5a3f0adcd;p=nageru

diff --git a/theme.lua b/theme.lua
index 04195f2..495f1fc 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.
@@ -400,8 +435,7 @@ function get_transitions(t)
 end
 
 -- API ENTRY POINT
--- Called when the user clicks a transition button. For our case,
--- we only do cuts, so we ignore the parameters; just switch live and preview.
+-- Called when the user clicks a transition button.
 function transition_clicked(num, t)
 	if num == 0 then
 		-- Cut.
@@ -820,9 +854,9 @@ end
 function calc_fade_progress(t, transition_start, transition_end)
 	local tt = (t - transition_start) / (transition_end - transition_start)
 	if tt < 0.0 then
-		tt = 0.0
+		return 0.0
 	elseif tt > 1.0 then
-		tt = 1.0
+		return 1.0
 	end
 
 	-- Make the fade look maybe a tad more natural, by pumping it