Port TG emissive appearances (#17194)

* Light

* Righto

* West solar screen was offset by two pixels

* Turns out the optimization makes most matrices moot

* Gotta do it like or else you get upwards of 6 extra atoms instead of 1

code/modules/lighting/emissive_blocker.dm

@@ -0,0 +1,40 @@
+/**
+  * Internal atom that copies an appearance on to the blocker plane
+  *
+  * This means that the atom in question will block any emissive sprites.
+  * This should only be used internally. If you are directly creating more of these,
+  * you're almost guaranteed to be doing something wrong.
+  */
+/atom/movable/emissive_blocker
+	name = "emissive blocker"
+	plane = EMISSIVE_PLANE
+	layer = FLOAT_LAYER
+	mouse_opacity = MOUSE_OPACITY_TRANSPARENT
+	appearance_flags = EMISSIVE_APPEARANCE_FLAGS
+
+/atom/movable/emissive_blocker/Initialize(mapload, source)
+	. = ..()
+	verbs.Cut() //Cargo culting from lighting object, this maybe affects memory usage?
+
+	render_source = source
+	color = EM_BLOCK_COLOR
+
+/atom/movable/emissive_blocker/ex_act(severity)
+	return FALSE
+
+/atom/movable/emissive_blocker/singularity_act()
+	return
+
+/atom/movable/emissive_blocker/singularity_pull()
+	return
+
+/atom/movable/emissive_blocker/blob_act()
+	return
+
+/atom/movable/emissive_blocker/onTransitZ()
+	return
+
+//Prevents people from moving these after creation, because they shouldn't be.
+/atom/movable/emissive_blocker/forceMove(atom/destination, no_tp = FALSE, harderforce = FALSE)
+	if(harderforce)
+		return ..()

code/modules/mob/living/carbon/human/human_defines.dm

@@ -3,6 +3,7 @@
 	hud_possible = list(HEALTH_HUD,STATUS_HUD,ID_HUD,WANTED_HUD,IMPMINDSHIELD_HUD,IMPCHEM_HUD,IMPTRACK_HUD,SPECIALROLE_HUD,GLAND_HUD)
 	pressure_resistance = 25
 	mob_biotypes = MOB_ORGANIC | MOB_HUMANOID
+	blocks_emissive = EMISSIVE_BLOCK_UNIQUE
 	//Marking colour and style
 	var/list/m_colours = DEFAULT_MARKING_COLOURS //All colours set to #000000.
 	var/list/m_styles = DEFAULT_MARKING_STYLES //All markings set to None.

code/modules/mob/living/carbon/human/update_icons.dm

@@ -533,6 +533,8 @@ GLOBAL_LIST_EMPTY(damage_icon_parts)
 	overlays.Cut() // Force all overlays to regenerate
 	update_fire()
 	update_icons()
+	update_emissive_block()
+
 /* --------------------------------------- */
 //vvvvvv UPDATE_INV PROCS vvvvvv
 

code/modules/mob/living/silicon/robot/robot.dm

@@ -12,6 +12,7 @@ GLOBAL_LIST_INIT(robot_verbs_default, list(
 	bubble_icon = "robot"
 	universal_understand = 1
 	deathgasp_on_death = TRUE
+	blocks_emissive = EMISSIVE_BLOCK_UNIQUE
 
 	var/sight_mode = 0
 	var/custom_name = ""

code/modules/mob/living/simple_animal/parrot.dm

@@ -33,6 +33,7 @@
 	icon_dead = "parrot_dead"
 	pass_flags = PASSTABLE
 	can_collar = TRUE
+	blocks_emissive = EMISSIVE_BLOCK_UNIQUE
 
 	var/list/clean_speak = list(
 		"Hi",

code/modules/mob/mob_defines.dm

@@ -6,6 +6,7 @@
 	throwforce = 10
 	dont_save = TRUE //to avoid it messing up in buildmode saving
 	var/datum/mind/mind
+	blocks_emissive = EMISSIVE_BLOCK_GENERIC
 
 	var/stat = 0 //Whether a mob is alive or dead. TODO: Move this to living - Nodrak