9 files changed, 61 insertions, 84 deletions
diff --git a/game/src/GameSession/GameSession.tscn b/game/src/GameSession/GameSession.tscn
index b993acf..98b43dd 100644
--- a/game/src/GameSession/GameSession.tscn
+++ b/game/src/GameSession/GameSession.tscn
@@ -69,7 +69,6 @@ grow_horizontal = 0
 [connection signal="province_selected" from="MapView" to="ProvinceOverviewPanel" method="_on_province_selected"]
 [connection signal="options_button_pressed" from="GameSessionMenu" to="OptionsMenu" method="show"]
 [connection signal="game_session_menu_button_pressed" from="MapControlPanel" to="." method="_on_game_session_menu_button_pressed"]
-[connection signal="mapmode_changed" from="MapControlPanel" to="MapView" method="_update_colour_texture"]
 [connection signal="minimap_clicked" from="MapControlPanel" to="MapView" method="_on_minimap_clicked"]
 [connection signal="mouse_entered" from="MapControlPanel" to="MapView" method="_on_mouse_exited_viewport"]
 [connection signal="mouse_exited" from="MapControlPanel" to="MapView" method="_on_mouse_entered_viewport"]
diff --git a/game/src/GameSession/MapControlPanel.gd b/game/src/GameSession/MapControlPanel.gd
index 73d7e06..508f692 100644
--- a/game/src/GameSession/MapControlPanel.gd
+++ b/game/src/GameSession/MapControlPanel.gd
@@ -1,7 +1,6 @@
 extends PanelContainer
 
 signal game_session_menu_button_pressed
-signal mapmode_changed
 signal map_view_camera_changed(near_left : Vector2, far_left : Vector2, far_right : Vector2, near_right : Vector2)
 signal minimap_clicked(pos_clicked : Vector2)
 signal zoom_in_button_pressed
@@ -40,7 +39,7 @@ func _on_game_session_menu_button_pressed() -> void:
 # * UIFUN-129, UIFUN-133
 func _mapmode_pressed(button : BaseButton) -> void:
 	GameSingleton.set_mapmode(button.tooltip_text)
-	mapmode_changed.emit()
+	GameSingleton.update_colour_image()
 
 func _on_map_view_camera_changed(near_left : Vector2, far_left : Vector2, far_right : Vector2, near_right : Vector2) -> void:
 	map_view_camera_changed.emit(near_left, far_left, far_right, near_right)
diff --git a/game/src/GameSession/MapControlPanel.tscn b/game/src/GameSession/MapControlPanel.tscn
index 18b1c3f..ae4c3dc 100644
--- a/game/src/GameSession/MapControlPanel.tscn
+++ b/game/src/GameSession/MapControlPanel.tscn
@@ -1,9 +1,12 @@
 [gd_scene load_steps=7 format=3 uid="uid://g524p8lr574w"]
 
 [ext_resource type="Script" path="res://src/GameSession/MapControlPanel.gd" id="1_ign64"]
-[ext_resource type="Texture2D" uid="uid://c0sm1jfu4kyv3" path="res://art/ui/minimap.png" id="2_r613r"]
+[ext_resource type="Shader" path="res://src/GameSession/Minimap.gdshader" id="2_rinsg"]
 [ext_resource type="Script" path="res://src/GameSession/Minimap.gd" id="3_s4dml"]
-[ext_resource type="Texture2D" uid="uid://vr1hq2stk8ny" path="res://art/ui/minimap_frame.png" id="4_f1exl"]
+
+[sub_resource type="ShaderMaterial" id="ShaderMaterial_bhuqb"]
+shader = ExtResource("2_rinsg")
+shader_parameter/province_shape_subdivisions = null
 
 [sub_resource type="InputEventAction" id="InputEventAction_5nck3"]
 action = &"ui_cancel"
@@ -41,28 +44,21 @@ columns = 11
 [node name="Minimap" type="PanelContainer" parent="MapPanelMargin/MapPanelList/MapDisplayList"]
 editor_description = "UI-549"
 layout_mode = 2
+size_flags_horizontal = 4
+size_flags_vertical = 4
 mouse_filter = 1
 
-[node name="MinimapTexture" type="TextureRect" parent="MapPanelMargin/MapPanelList/MapDisplayList/Minimap"]
+[node name="MinimapTexture" type="ColorRect" parent="MapPanelMargin/MapPanelList/MapDisplayList/Minimap"]
 editor_description = "UI-751, FS-338"
+material = SubResource("ShaderMaterial_bhuqb")
 layout_mode = 2
-texture = ExtResource("2_r613r")
+color = Color(0.921569, 0.835294, 0.701961, 1)
 
-[node name="ViewportQuad" type="Control" parent="MapPanelMargin/MapPanelList/MapDisplayList/Minimap"]
+[node name="ViewportQuad" type="Control" parent="MapPanelMargin/MapPanelList/MapDisplayList/Minimap" node_paths=PackedStringArray("_minimap_texture")]
 layout_mode = 2
 mouse_filter = 2
 script = ExtResource("3_s4dml")
-
-[node name="Frame" type="NinePatchRect" parent="MapPanelMargin/MapPanelList/MapDisplayList/Minimap"]
-layout_mode = 2
-texture = ExtResource("4_f1exl")
-draw_center = false
-patch_margin_left = 10
-patch_margin_top = 10
-patch_margin_right = 10
-patch_margin_bottom = 10
-axis_stretch_horizontal = 1
-axis_stretch_vertical = 1
+_minimap_texture = NodePath("../MinimapTexture")
 
 [node name="AuxiliaryPanel" type="VBoxContainer" parent="MapPanelMargin/MapPanelList"]
 editor_description = "UI-761"
diff --git a/game/src/GameSession/MapView.gd b/game/src/GameSession/MapView.gd
index e74ea59..340083f 100644
--- a/game/src/GameSession/MapView.gd
+++ b/game/src/GameSession/MapView.gd
@@ -12,12 +12,6 @@ const _action_zoom_out : StringName = &"map_zoom_out"
 const _action_drag : StringName = &"map_drag"
 const _action_click : StringName = &"map_click"
 
-const _shader_param_province_index : StringName = &"province_index_tex"
-const _shader_param_province_colour : StringName = &"province_colour_tex"
-const _shader_param_hover_index : StringName = &"hover_index"
-const _shader_param_selected_index : StringName = &"selected_index"
-const _shader_param_terrain_tile_factor : StringName = &"terrain_tile_factor"
-
 @export var _camera : Camera3D
 
 @export var _cardinal_move_speed : float = 1.0
@@ -40,9 +34,6 @@ var _mouse_over_viewport : bool = true
 @export var _map_mesh_instance : MeshInstance3D
 var _map_mesh : MapMesh
 var _map_shader_material : ShaderMaterial
-var _map_image_size : Vector2
-var _map_province_colour_image : Image
-var _map_province_colour_texture : ImageTexture
 var _map_mesh_corner : Vector2
 var _map_mesh_dims : Vector2
 
@@ -68,42 +59,19 @@ func _ready():
 
 	# Shader Material
 	var map_material := _map_mesh_instance.get_active_material(0)
-	if map_material == null:
-		push_error("Map mesh is missing material!")
-		return
-	if not map_material is ShaderMaterial:
-		push_error("Invalid map mesh material class: ", map_material.get_class())
+	if Events.ShaderManager.set_up_shader(map_material, true) != OK:
+		push_error("Failed to set up map shader")
 		return
 	_map_shader_material = map_material
 
-	# Province index textures
-	var map_province_index_images := GameSingleton.get_province_index_images()
-	if map_province_index_images == null or map_province_index_images.is_empty():
-		push_error("Failed to get province index image!")
-		return
-	var province_index_texture := Texture2DArray.new()
-	if province_index_texture.create_from_images(map_province_index_images) != OK:
-		push_error("Failed to generate province index texture array!")
-		return
-	_map_shader_material.set_shader_parameter(_shader_param_province_index, province_index_texture)
-
-	# Province colour texture
-	_map_province_colour_image = GameSingleton.get_province_colour_image()
-	if _map_province_colour_image == null:
-		push_error("Failed to get province colour image!")
-		return
-	_map_province_colour_texture = ImageTexture.create_from_image(_map_province_colour_image)
-	_map_shader_material.set_shader_parameter(_shader_param_province_colour, _map_province_colour_texture)
-
 	if not _map_mesh_instance.mesh is MapMesh:
 		push_error("Invalid map mesh class: ", _map_mesh_instance.mesh.get_class(), "(expected MapMesh)")
 		return
 	_map_mesh = _map_mesh_instance.mesh
 
 	# Set map mesh size and get bounds
-	_map_image_size = Vector2(Vector2i(GameSingleton.get_width(), GameSingleton.get_height()))
-	_map_mesh.aspect_ratio = _map_image_size.x / _map_image_size.y
-	_map_shader_material.set_shader_parameter(_shader_param_terrain_tile_factor, _map_image_size.y / 64.0)
+	_map_mesh.aspect_ratio = GameSingleton.get_aspect_ratio()
+	_map_shader_material.set_shader_parameter(Events.ShaderManager.param_terrain_tile_factor, float(GameSingleton.get_height()) / 64.0)
 	var map_mesh_aabb := _map_mesh.get_core_aabb() * _map_mesh_instance.transform
 	_map_mesh_corner = Vector2(
 		min(map_mesh_aabb.position.x, map_mesh_aabb.end.x),
@@ -121,10 +89,6 @@ func _notification(what : int):
 		NOTIFICATION_WM_MOUSE_EXIT: # Mouse out of window
 			_on_mouse_exited_viewport()
 
-func _update_colour_texture() -> void:
-	GameSingleton.update_colour_image()
-	_map_province_colour_texture.update(_map_province_colour_image)
-
 func _world_to_map_coords(pos : Vector3) -> Vector2:
 	return (Vector2(pos.x, pos.z) - _map_mesh_corner) / _map_mesh_dims
 
@@ -154,7 +118,7 @@ func _unhandled_input(event : InputEvent):
 		# Check if the mouse is outside of bounds
 		if _map_mesh.is_valid_uv_coord(_mouse_pos_map):
 			var selected_index := GameSingleton.get_province_index_from_uv_coords(_mouse_pos_map)
-			_map_shader_material.set_shader_parameter(_shader_param_selected_index, selected_index)
+			_map_shader_material.set_shader_parameter(Events.ShaderManager.param_selected_index, selected_index)
 			province_selected.emit(selected_index)
 		else:
 			print("Clicked outside the map!")
@@ -251,7 +215,7 @@ func _update_mouse_map_position() -> void:
 	_mouse_pos_map = _viewport_to_map_coords(_mouse_pos_viewport)
 	var hover_index := GameSingleton.get_province_index_from_uv_coords(_mouse_pos_map)
 	if _mouse_over_viewport:
-		_map_shader_material.set_shader_parameter(_shader_param_hover_index, hover_index)
+		_map_shader_material.set_shader_parameter(Events.ShaderManager.param_hover_index, hover_index)
 
 func _on_mouse_entered_viewport():
 	_mouse_over_viewport = true
diff --git a/game/src/GameSession/MapView.tscn b/game/src/GameSession/MapView.tscn
index c8934c5..efbad4e 100644
--- a/game/src/GameSession/MapView.tscn
+++ b/game/src/GameSession/MapView.tscn
@@ -7,6 +7,7 @@
 [sub_resource type="ShaderMaterial" id="ShaderMaterial_tayeg"]
 render_priority = 0
 shader = ExtResource("1_upocn")
+shader_parameter/province_index_subdivisions = null
 shader_parameter/hover_index = null
 shader_parameter/selected_index = null
 shader_parameter/terrain_tile_factor = null
diff --git a/game/src/GameSession/Minimap.gd b/game/src/GameSession/Minimap.gd
index 25c7cac..05c662b 100644
--- a/game/src/GameSession/Minimap.gd
+++ b/game/src/GameSession/Minimap.gd
@@ -4,8 +4,15 @@ signal minimap_clicked(pos_clicked : Vector2)
 
 const _action_click : StringName = &"map_click"
 
+@export var _minimap_texture : Control
+
 var _viewport_points : PackedVector2Array
 
+func _ready():
+	_minimap_texture.custom_minimum_size = Vector2(GameSingleton.get_aspect_ratio(), 1.0) * 150
+	if Events.ShaderManager.set_up_shader(_minimap_texture.get_material(), false) != OK:
+		push_error("Failed to set up minimap shader")
+
 # REQUIREMENTS
 # * SS-80
 # * UI-752
diff --git a/game/src/GameSession/Minimap.gdshader b/game/src/GameSession/Minimap.gdshader
new file mode 100644
index 0000000..9afd470
--- /dev/null
+++ b/game/src/GameSession/Minimap.gdshader
@@ -0,0 +1,7 @@
+shader_type canvas_item;
+
+#include "ProvinceIndexSampler.gdshaderinc"
+
+void fragment() {
+	COLOR.rgb = mix(COLOR.rgb, vec3(0.5), float(read_uvec3(UV).b != 0u));
+}
diff --git a/game/src/GameSession/ProvinceIndexSampler.gdshaderinc b/game/src/GameSession/ProvinceIndexSampler.gdshaderinc
new file mode 100644
index 0000000..65f73d8
--- /dev/null
+++ b/game/src/GameSession/ProvinceIndexSampler.gdshaderinc
@@ -0,0 +1,18 @@
+
+// Province shape texture
+uniform sampler2DArray province_shape_tex : repeat_enable, filter_nearest;
+// Province shape subdivisions
+uniform vec2 province_shape_subdivisions;
+
+uvec3 vec3_to_uvec3(vec3 v) {
+	return uvec3(v * 255.0);
+}
+uvec3 read_uvec3(vec2 uv) {
+	uv *= province_shape_subdivisions;
+	vec2 subdivision_coords = mod(floor(uv),  province_shape_subdivisions);
+	float idx = subdivision_coords.x + subdivision_coords.y * province_shape_subdivisions.x;
+	return vec3_to_uvec3(texture(province_shape_tex, vec3(uv, idx)).rgb);
+}
+uint uvec2_to_uint(uvec2 v) {
+	return (v.y << 8u) | v.x;
+}
diff --git a/game/src/GameSession/TerrainMap.gdshader b/game/src/GameSession/TerrainMap.gdshader
index 305a34b..05928f3 100644
--- a/game/src/GameSession/TerrainMap.gdshader
+++ b/game/src/GameSession/TerrainMap.gdshader
@@ -2,40 +2,26 @@ shader_type spatial;
 
 render_mode unshaded;
 
-// Cosmetic farmlands terrain texture
-uniform sampler2D farmlands_tex: source_color, repeat_enable, filter_linear;
-// Province index texture
-uniform sampler2DArray province_index_tex : source_color, repeat_enable, filter_nearest;
+#include "ProvinceIndexSampler.gdshaderinc"
+
 // Province colour texture
 uniform sampler2D province_colour_tex: source_color, repeat_enable, filter_nearest;
 // Index of the mouse over the map mesh
 uniform uint hover_index;
 // Index of the currently selected province
 uniform uint selected_index;
+// Cosmetic farmlands terrain texture
+uniform sampler2D farmlands_tex: source_color, repeat_enable, filter_linear;
 // The number of times the terrain textures should tile vertically
 uniform float terrain_tile_factor;
 
-uvec2 vec2_to_uvec2(vec2 v) {
-	return uvec2(v * 255.0);
-}
-uvec2 read_uvec2(vec2 uv) {
-	float width_divisions = float(textureSize(province_index_tex, 0).z);
-	uv.x *= width_divisions;
-	float idx = mod(floor(uv.x),  width_divisions);
-	return vec2_to_uvec2(texture(province_index_tex, vec3(uv, idx)).rg);
-}
-uint uvec2_to_uint(uvec2 v) {
-	return (v.y << 8u) | v.x;
-}
-
 const vec3 water_colour = vec3(0, 0, 1);
 
 vec3 get_terrain_colour(vec2 uv, vec2 corner, vec2 half_pixel_size, vec2 terrain_uv) {
-	uvec2 index_split = read_uvec2(fma(corner, half_pixel_size, uv));
-	uint index = uvec2_to_uint(index_split);
-	vec4 province_data = texelFetch(province_colour_tex, ivec2(index_split), 0);
-	vec3 province_colour = province_data.rgb;
-	float is_land = province_data.a;
+	uvec3 province_data = read_uvec3(fma(corner, half_pixel_size, uv));
+	uint index = uvec2_to_uint(province_data.rg);
+	float is_land = float(province_data.b != 0u);
+	vec3 province_colour = texelFetch(province_colour_tex, ivec2(province_data.rg), 0).rgb;
 	vec3 farmlands_colour = texture(farmlands_tex, terrain_uv).rgb;
 	vec3 terrain_colour = mix(water_colour, farmlands_colour, is_land);
 	float mix_val = 0.4 + float(index == hover_index) * 0.2 + float(index == selected_index) * 0.2;
@@ -44,7 +30,7 @@ vec3 get_terrain_colour(vec2 uv, vec2 corner, vec2 half_pixel_size, vec2 terrain
 }
 
 vec3 mix_terrain_colour(vec2 uv) {
-	vec2 map_size = vec2(textureSize(province_index_tex, 0).xy);
+	vec2 map_size = vec2(textureSize(province_shape_tex, 0).xy);
 	vec2 pixel_offset = fract(fma(uv, map_size, vec2(0.5)));
 	vec2 half_pixel_size = 0.49 / map_size;