Convert channel_signal() and supports_set_wb() to imperative versions.

[nageru] / nageru / theme.lua

diff --git a/nageru/theme.lua b/nageru/theme.lua
index c524d566deb1a2ddf057ad5a0b6f25265f97e6a5..6137cae6c0705fd39fb6c6631f0a9c7b38fb7838 100644 (file)
--- a/nageru/theme.lua
+++ b/nageru/theme.lua
@@ -112,6 +112,23 @@ static_scene:finalize()
 
 -- Set some global state.
 Nageru.set_num_channels(4)  -- Can only be called at the start of the program.
+
+-- Set some global state. Unless marked otherwise, these can only be set once,
+-- at the start of the program.
+Nageru.set_num_channels(4)
+
+-- Sets, for each channel, which signal it corresponds to (starting from 0).
+-- The information is used for whether right-click on the channel should bring up
+-- an input selector or not. Only call this for channels that actually correspond
+-- directly to a signal (ie., live inputs, not live (0) or preview (1)).
+Nageru.set_channel_signal(2, 0)
+Nageru.set_channel_signal(3, 1)
+
+-- Set whether a given channel supports setting white balance. (Default is false.)
+Nageru.set_supports_wb(2, true)
+Nageru.set_supports_wb(3, true)
+
+-- These can be set at any time.
 Nageru.set_channel_name(SBS_SIGNAL_NUM + 2, "Side-by-side")
 Nageru.set_channel_name(STATIC_SIGNAL_NUM + 2, "Static picture")
 
@@ -119,25 +136,6 @@ function is_plain_signal(num)
        return num == INPUT0_SIGNAL_NUM or num == INPUT1_SIGNAL_NUM
 end
 
--- API ENTRY POINT
--- Returns, given a channel number, which signal it corresponds to (starting from 0).
--- Should return -1 if the channel does not correspond to a simple signal
--- (one connected to a capture card, or a video input). The information is used for
--- whether right-click on the channel should bring up a context menu or not,
--- typically containing an input selector, resolution menu etc.
---
--- Called once for each channel, at the start of the program.
--- Will never be called for live (0) or preview (1).
-function channel_signal(channel)
-       if channel == 2 then
-               return 0
-       elseif channel == 3 then
-               return 1
-       else
-               return -1
-       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);
@@ -173,13 +171,6 @@ function channel_involved_in(channel, signal_num)
        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.
-function supports_set_wb(channel)
-       return is_plain_signal(channel - 2)
-end
-
 -- API ENTRY POINT
 -- Gets called with a new gray point when the white balance is changing.
 -- The color is in linear light (not sRGB gamma).