Terrain textures + province colour alpha channel

1 files changed, 136 insertions, 61 deletions

diff --git a/extension/src/GameSingleton.cpp b/extension/src/GameSingleton.cpp
index 64f6fc1..3476ac5 100644
--- a/extension/src/GameSingleton.cpp
+++ b/extension/src/GameSingleton.cpp
@@ -5,7 +5,6 @@
 #include <godot_cpp/classes/json.hpp>
 
 #include "openvic2/Logger.hpp"
-#include "openvic2/Types.hpp"
 
 using namespace godot;
 using namespace OpenVic2;
@@ -18,7 +17,8 @@ void GameSingleton::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("load_province_identifier_file", "file_path"), &GameSingleton::load_province_identifier_file);
 	ClassDB::bind_method(D_METHOD("load_water_province_file", "file_path"), &GameSingleton::load_water_province_file);
 	ClassDB::bind_method(D_METHOD("load_region_file", "file_path"), &GameSingleton::load_region_file);
-	ClassDB::bind_method(D_METHOD("load_province_shape_file", "file_path"), &GameSingleton::load_province_shape_file);
+	ClassDB::bind_method(D_METHOD("load_terrain_file", "file_path"), &GameSingleton::load_terrain_file);
+	ClassDB::bind_method(D_METHOD("load_map_images", "province_image_path", "terrain_image_path"), &GameSingleton::load_map_images);
 	ClassDB::bind_method(D_METHOD("setup"), &GameSingleton::setup);
 
 	ClassDB::bind_method(D_METHOD("get_province_index_from_uv_coords", "coords"), &GameSingleton::get_province_index_from_uv_coords);
@@ -26,6 +26,7 @@ void GameSingleton::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("get_width"), &GameSingleton::get_width);
 	ClassDB::bind_method(D_METHOD("get_height"), &GameSingleton::get_height);
 	ClassDB::bind_method(D_METHOD("get_aspect_ratio"), &GameSingleton::get_aspect_ratio);
+	ClassDB::bind_method(D_METHOD("get_terrain_texture"), &GameSingleton::get_terrain_texture);
 	ClassDB::bind_method(D_METHOD("get_province_shape_image_subdivisions"), &GameSingleton::get_province_shape_image_subdivisions);
 	ClassDB::bind_method(D_METHOD("get_province_shape_texture"), &GameSingleton::get_province_shape_texture);
 	ClassDB::bind_method(D_METHOD("get_province_colour_texture"), &GameSingleton::get_province_colour_texture);
@@ -57,27 +58,31 @@ GameSingleton* GameSingleton::get_singleton() {
 /* REQUIREMENTS:
  * MAP-21, MAP-25
  */
-GameSingleton::GameSingleton() : game_manager{ [this]() { emit_signal("state_updated"); } } {
+GameSingleton::GameSingleton() : game_manager{ [this]() { emit_signal("state_updated"); } }, terrain_variants{ "terrain variants" } {
 	ERR_FAIL_COND(singleton != nullptr);
 	singleton = this;
 
 	Logger::set_info_func([](std::string&& str) { UtilityFunctions::print(str.c_str()); });
 	Logger::set_error_func([](std::string&& str) { UtilityFunctions::push_error(str.c_str()); });
 
+	static constexpr colour_t HIGH_ALPHA_VALUE = to_alpha_value(0.5f);
+	static constexpr colour_t LOW_ALPHA_VALUE = to_alpha_value(0.2f);
 	using mapmode_t = std::pair<std::string, Mapmode::colour_func_t>;
 	const std::vector<mapmode_t> mapmodes = {
-		{ "mapmode_province", [](Map const&, Province const& province) -> colour_t { return province.get_colour(); } },
+		{ "mapmode_terrain", [](Map const&, Province const& province) -> colour_t {
+			return LOW_ALPHA_VALUE | (province.is_water() ? 0x4287F5 : 0x0D7017);
+		} },
+		{ "mapmode_province", [](Map const&, Province const& province) -> colour_t {
+			return HIGH_ALPHA_VALUE | province.get_colour();
+		} },
 		{ "mapmode_region", [](Map const&, Province const& province) -> colour_t {
 			Region const* region = province.get_region();
-			if (region != nullptr) return region->get_colour();
-			return province.get_colour();
-		} },
-		{ "mapmode_terrain", [](Map const&, Province const& province) -> colour_t {
-			return province.is_water() ? 0x4287F5 : 0x0D7017;
+			if (region != nullptr) return (0xCC << 24) | region->get_colour();
+			return NULL_COLOUR;
 		} },
 		{ "mapmode_index", [](Map const& map, Province const& province) -> colour_t {
 			const uint8_t f = static_cast<float>(province.get_index()) / static_cast<float>(map.get_province_count()) * 255.0f;
-			return (f << 16) | (f << 8) | f;
+			return HIGH_ALPHA_VALUE | (f << 16) | (f << 8) | f;
 		} }
 	};
 	for (mapmode_t const& mapmode : mapmodes)
@@ -99,7 +104,7 @@ GameSingleton::~GameSingleton() {
 	singleton = nullptr;
 }
 
-static Error load_json_file(String const& file_description, String const& file_path, Variant& result) {
+static Error _load_json_file(String const& file_description, String const& file_path, Variant& result) {
 	result.clear();
 	UtilityFunctions::print("Loading ", file_description, " file: ", file_path);
 	const Ref<FileAccess> file = FileAccess::open(file_path, FileAccess::ModeFlags::READ);
@@ -122,10 +127,10 @@ static Error load_json_file(String const& file_description, String const& file_p
 
 using parse_json_entry_func_t = std::function<godot::Error (godot::String const&, godot::Variant const&)>;
 
-static Error parse_json_dictionary_file(String const& file_description, String const& file_path,
+static Error _parse_json_dictionary_file(String const& file_description, String const& file_path,
 	String const& identifier_prefix, parse_json_entry_func_t parse_entry) {
 	Variant json_var;
-	Error err = load_json_file(file_description, file_path, json_var);
+	Error err = _load_json_file(file_description, file_path, json_var);
 	if (err != OK) return err;
 	const Variant::Type type = json_var.get_type();
 	if (type != Variant::DICTIONARY) {
@@ -150,40 +155,37 @@ static Error parse_json_dictionary_file(String const& file_description, String c
 	return err;
 }
 
-Error GameSingleton::_parse_province_identifier_entry(String const& identifier, Variant const& entry) {
-	const Variant::Type type = entry.get_type();
-	colour_t colour = NULL_COLOUR;
+static colour_t _parse_colour(Variant const& var) {
+	const Variant::Type type = var.get_type();
 	if (type == Variant::ARRAY) {
-		Array const& colour_array = entry;
+		Array const& colour_array = var;
 		if (colour_array.size() == 3) {
+			colour_t colour = NULL_COLOUR;
 			for (int jdx = 0; jdx < 3; ++jdx) {
 				Variant const& var = colour_array[jdx];
-				if (var.get_type() != Variant::FLOAT) {
-					colour = NULL_COLOUR;
-					break;
-				}
+				if (var.get_type() != Variant::FLOAT) return NULL_COLOUR;
 				const double colour_double = var;
-				if (std::trunc(colour_double) != colour_double) {
-					colour = NULL_COLOUR;
-					break;
-				}
+				if (std::trunc(colour_double) != colour_double) return NULL_COLOUR;
 				const int64_t colour_int = static_cast<int64_t>(colour_double);
-				if (colour_int < 0 || colour_int > 255) {
-					colour = NULL_COLOUR;
-					break;
-				}
+				if (colour_int < 0 || colour_int > 255) return NULL_COLOUR;
 				colour = (colour << 8) | colour_int;
 			}
+			return colour;
 		}
 	}
 	else if (type == Variant::STRING) {
-		String const& colour_string = entry;
+		String const& colour_string = var;
 		if (colour_string.is_valid_hex_number()) {
 			const int64_t colour_int = colour_string.hex_to_int();
-			if (0 <= colour_int && colour_int <= 0xFFFFFF)
-				colour = colour_int;
+			if (colour_int != NULL_COLOUR && colour_int <= MAX_COLOUR_RGB)
+				return colour_int;
 		}
 	}
+	return NULL_COLOUR;
+}
+
+Error GameSingleton::_parse_province_identifier_entry(String const& identifier, Variant const& entry) {
+	const colour_t colour = _parse_colour(entry);
 	if (colour == NULL_COLOUR) {
 		UtilityFunctions::push_error("Invalid colour for province identifier \"", identifier, "\": ", entry);
 		return FAILED;
@@ -192,7 +194,7 @@ Error GameSingleton::_parse_province_identifier_entry(String const& identifier,
 }
 
 Error GameSingleton::load_province_identifier_file(String const& file_path) {
-	const Error err = parse_json_dictionary_file("province identifier", file_path, "prov_",
+	const Error err = _parse_json_dictionary_file("province identifier", file_path, "prov_",
 		[this](String const& identifier, Variant const& entry) -> Error {
 			return _parse_province_identifier_entry(identifier, entry);
 		});
@@ -227,7 +229,7 @@ Error GameSingleton::_parse_region_entry(String const& identifier, Variant const
 }
 
 Error GameSingleton::load_region_file(String const& file_path) {
-	const Error err = parse_json_dictionary_file("region", file_path, "region_",
+	const Error err = _parse_json_dictionary_file("region", file_path, "region_",
 		[this](String const& identifier, Variant const& entry) -> Error {
 			return _parse_region_entry(identifier, entry);
 		});
@@ -235,38 +237,107 @@ Error GameSingleton::load_region_file(String const& file_path) {
 	return err;
 }
 
-Error GameSingleton::load_province_shape_file(String const& file_path) {
+TerrainVariant::TerrainVariant(std::string const& new_identfier, colour_t new_colour, Ref<Image> const& new_image)
+	: HasIdentifier(new_identfier), HasColour(new_colour), image(new_image) {}
+
+Ref<Image> TerrainVariant::get_image() const { return image; }
+
+Error GameSingleton::_parse_terrain_entry(String const& identifier, Variant const& entry) {
+	const colour_t colour = _parse_colour(entry);
+	if (colour == NULL_COLOUR) {
+		UtilityFunctions::push_error("Invalid colour for terrain texture \"", identifier, "\": ", entry);
+		return FAILED;
+	}
+	static const String terrain_folder = "res://art/terrain/";
+	const String terrain_path = terrain_folder + identifier;
+	Ref<Image> terrain_image;
+	terrain_image.instantiate();
+	const Error err = terrain_image->load(terrain_path);
+	if (err != OK) {
+		UtilityFunctions::push_error("Failed to load terrain image: ", terrain_path);
+		return err;
+	}
+	return ERR(terrain_variants.add_item({ identifier.utf8().get_data(), colour, terrain_image }));
+}
+
+Error GameSingleton::load_terrain_file(String const& file_path) {
+	Error parse_err = _parse_json_dictionary_file("terrain variants", file_path, "",
+		[this](String const& identifier, Variant const& entry) -> Error {
+			return _parse_terrain_entry(identifier, entry);
+		});
+	terrain_variants.lock();
+	if (terrain_variants.get_item_count() == 0) parse_err = FAILED;
+
+	Array terrain_images;
+	for (TerrainVariant const& var : terrain_variants.get_items()) {
+		terrain_variant_map[var.get_colour()] = terrain_images.size();
+		terrain_images.append(var.get_image());
+	}
+
+	terrain_texture.instantiate();
+	const Error texturearray_err = terrain_texture->create_from_images(terrain_images);
+	if (texturearray_err != OK) {
+		UtilityFunctions::push_error("Failed to create terrain texture array!");
+		return texturearray_err;
+	}
+	return parse_err;
+}
+
+Error GameSingleton::load_map_images(String const& province_image_path, String const& terrain_image_path) {
 	if (province_shape_texture.is_valid()) {
-		UtilityFunctions::push_error("Province shape file has already been loaded, cannot load: ", file_path);
+		UtilityFunctions::push_error("Map images have already been loaded, cannot load: ", province_image_path, " and ", terrain_image_path);
 		return FAILED;
 	}
-	Ref<Image> province_shape_image;
-	province_shape_image.instantiate();
-	Error err = province_shape_image->load(file_path);
+
+	// Load images
+	Ref<Image> province_image, terrain_image;
+	province_image.instantiate();
+	terrain_image.instantiate();
+	Error err = province_image->load(province_image_path);
+	if (err != OK) {
+		UtilityFunctions::push_error("Failed to load province image: ", province_image_path);
+		return err;
+	}
+	err = terrain_image->load(terrain_image_path);
 	if (err != OK) {
-		UtilityFunctions::push_error("Failed to load province shape file: ", file_path);
+		UtilityFunctions::push_error("Failed to load terrain image: ", terrain_image_path);
 		return err;
 	}
-	const Vector2i image_dims = province_shape_image->get_size();
-	if (image_dims.x < 1 || image_dims.y < 1) {
-		UtilityFunctions::push_error("Invalid dimensions (", image_dims.x, "x", image_dims.y, ") for province shape file: ", file_path);
+
+	// Validate dimensions and format
+	const Vector2i province_dims = province_image->get_size(), terrain_dims = terrain_image->get_size();
+	if (province_dims.x < 1 || province_dims.y < 1) {
+		UtilityFunctions::push_error("Invalid dimensions (", province_dims.x, "x", province_dims.y, ") for province image: ", province_image_path);
+		err = FAILED;
+	}
+	if (province_dims != terrain_dims) {
+		UtilityFunctions::push_error("Invalid dimensions (", terrain_dims.x, "x", terrain_dims.y, ") for terrain image: ",
+			terrain_image_path, " (must match province image: (", province_dims.x, "x", province_dims.x, "))");
 		err = FAILED;
 	}
-	static constexpr int32_t GPU_DIM_LIMIT = 0x3FFF;
-	// For each dimension of the image, this finds the small number of equal subdivisions required get the individual texture dims under GPU_DIM_LIMIT
-	for (int i = 0; i < 2; ++i) for (image_subdivisions[i] = 1;
-		image_dims[i] / image_subdivisions[i] > GPU_DIM_LIMIT || image_dims[i] % image_subdivisions[i] != 0; ++image_subdivisions[i]);
 	static constexpr Image::Format expected_format = Image::FORMAT_RGB8;
-	const Image::Format format = province_shape_image->get_format();
-	if (format != expected_format) {
-		UtilityFunctions::push_error("Invalid format (", format, ", should be ", expected_format, ") for province shape file: ", file_path);
+	const Image::Format province_format = province_image->get_format(), terrain_format = terrain_image->get_format();
+	if (province_format != expected_format) {
+		UtilityFunctions::push_error("Invalid format (", province_format, ", should be ", expected_format, ") for province image: ", province_image_path);
+		err = FAILED;
+	}
+	if (terrain_format != expected_format) {
+		UtilityFunctions::push_error("Invalid format (", terrain_format, ", should be ", expected_format, ") for terrain image: ", terrain_image_path);
 		err = FAILED;
 	}
 	if (err != OK) return err;
-	err = ERR(game_manager.map.generate_province_shape_image(image_dims.x, image_dims.y, province_shape_image->get_data().ptr()));
 
-	std::vector<Map::shape_pixel_t> const& province_shape_data = game_manager.map.get_province_shape_image();
-	const Vector2i divided_dims = image_dims / image_subdivisions;
+	// Generate interleaved province and terrain ID image
+	if (game_manager.map.generate_province_shape_image(province_dims.x, province_dims.y, province_image->get_data().ptr(),
+		terrain_image->get_data().ptr(), terrain_variant_map) != SUCCESS) return FAILED;
+
+	static constexpr int32_t GPU_DIM_LIMIT = 0x3FFF;
+	// For each dimension of the image, this finds the small number of equal subdivisions required get the individual texture dims under GPU_DIM_LIMIT
+	for (int i = 0; i < 2; ++i) for (image_subdivisions[i] = 1;
+		province_dims[i] / image_subdivisions[i] > GPU_DIM_LIMIT || province_dims[i] % image_subdivisions[i] != 0; ++image_subdivisions[i]);
+
+	Map::shape_pixel_t const* province_shape_data = game_manager.map.get_province_shape_image().data();
+	const Vector2i divided_dims = province_dims / image_subdivisions;
 	Array province_shape_images;
 	province_shape_images.resize(image_subdivisions.x * image_subdivisions.y);
 	for (int32_t v = 0; v < image_subdivisions.y; ++v) {
@@ -276,15 +347,15 @@ Error GameSingleton::load_province_shape_file(String const& file_path) {
 
 			for (int32_t y = 0; y < divided_dims.y; ++y)
 				memcpy(index_data_array.ptrw() + y * divided_dims.x * sizeof(Map::shape_pixel_t),
-					province_shape_data.data() + (v * divided_dims.y + y) * image_dims.x + u * divided_dims.x,
+					province_shape_data + (v * divided_dims.y + y) * province_dims.x + u * divided_dims.x,
 					divided_dims.x * sizeof(Map::shape_pixel_t));
 
-			const Ref<Image> province_index_subimage = Image::create_from_data(divided_dims.x, divided_dims.y, false, Image::FORMAT_RGB8, index_data_array);
-			if (province_index_subimage.is_null()) {
-				UtilityFunctions::push_error("Failed to create province index image (", u, ", ", v, ")");
+			const Ref<Image> province_shape_subimage = Image::create_from_data(divided_dims.x, divided_dims.y, false, Image::FORMAT_RGB8, index_data_array);
+			if (province_shape_subimage.is_null()) {
+				UtilityFunctions::push_error("Failed to create province shape image (", u, ", ", v, ")");
 				err = FAILED;
 			}
-			province_shape_images[u + v * image_subdivisions.x] = province_index_subimage;
+			province_shape_images[u + v * image_subdivisions.x] = province_shape_subimage;
 		}
 	}
 
@@ -305,7 +376,7 @@ godot::Error GameSingleton::setup() {
 
 Error GameSingleton::load_water_province_file(String const& file_path) {
 	Variant json_var;
-	Error err = load_json_file("water province", file_path, json_var);
+	Error err = _load_json_file("water province", file_path, json_var);
 	if (err != OK) return err;
 	Variant::Type type = json_var.get_type();
 	if (type != Variant::ARRAY) {
@@ -358,7 +429,7 @@ Dictionary GameSingleton::get_province_info_from_index(int32_t index) const {
 		buildings_array.resize(buildings.size());
 		for (size_t idx = 0; idx < buildings.size(); ++idx) {
 			KEY(building) KEY(level) KEY(expansion_state) KEY(start_date) KEY(end_date) KEY(expansion_progress)
-			
+
 			Dictionary building_dict;
 			Building const& building = buildings[idx];
 			building_dict[building_key] = building.get_identifier().c_str();
@@ -388,6 +459,10 @@ float GameSingleton::get_aspect_ratio() const {
 	return static_cast<float>(get_width()) / static_cast<float>(get_height());
 }
 
+Ref<Texture> GameSingleton::get_terrain_texture() const {
+	return terrain_texture;
+}
+
 Vector2i GameSingleton::get_province_shape_image_subdivisions() const {
 	return image_subdivisions;
 }
@@ -413,7 +488,7 @@ Error GameSingleton::update_colour_image() {
 	if (province_colour_image.is_null())
 		province_colour_image.instantiate();
 	province_colour_image->set_data(PROVINCE_INDEX_SQRT, PROVINCE_INDEX_SQRT,
-		false, Image::FORMAT_RGB8, colour_data_array);
+		false, Image::FORMAT_RGBA8, colour_data_array);
 	if (province_colour_image.is_null()) {
 		UtilityFunctions::push_error("Failed to update province colour image");
 		return FAILED;