From cc1052ceb42870f87fafcf56be805c9f80e43a99 Mon Sep 17 00:00:00 2001
From: Luke Hubmayer-Werner <mongoose41@gmail.com>
Date: Fri, 28 Jul 2023 15:57:21 +0930
Subject: [PATCH] Add json loading

---
 project.godot                    |  1 +
 scripts/loaders/common.gd        | 13 ++++++++++
 scripts/loaders/sprite_loader.gd | 43 +++++++++++++++++++++++++++++++-
 3 files changed, 56 insertions(+), 1 deletion(-)
 create mode 100644 scripts/loaders/common.gd

diff --git a/project.godot b/project.godot
index 9d2146f..eced9ed 100644
--- a/project.godot
+++ b/project.godot
@@ -21,6 +21,7 @@ config/icon="res://icon.png"
 [autoload]
 
 globals="*res://globals.gd"
+Common="*res://scripts/loaders/common.gd"
 CommonGBA="*res://scripts/loaders/common_gba.gd"
 SoundLoader="*res://scripts/loaders/sound_loader.gd"
 SpriteLoader="*res://scripts/loaders/sprite_loader.gd"
diff --git a/scripts/loaders/common.gd b/scripts/loaders/common.gd
new file mode 100644
index 0000000..da8cf9b
--- /dev/null
+++ b/scripts/loaders/common.gd
@@ -0,0 +1,13 @@
+extends Node
+
+func load_json(filename: String) -> Dictionary:
+	var file := File.new()
+	var error := file.open(filename, File.READ)
+	if error == OK:
+		var result = JSON.parse(file.get_as_text())
+		if result.error == OK:
+			return result.result
+		else:
+			print_debug(result.error_string)
+			print_debug(result.error_line)
+	return {}
diff --git a/scripts/loaders/sprite_loader.gd b/scripts/loaders/sprite_loader.gd
index f67f280..897aae7 100644
--- a/scripts/loaders/sprite_loader.gd
+++ b/scripts/loaders/sprite_loader.gd
@@ -274,7 +274,7 @@ func snes_load_worldmap(rom: File):
 	MapLoader.update_worldmap_block_tile_ids(worldmap_block_tile_ids)
 
 
-func load_snes_rom(rom: File):
+func snes_load_battle_sprites(rom: File):
 	# Load Battle sprites
 	rom.seek(offset_Character_Battle_Sprite_Layouts)
 	var battle_strip_layouts = rom.get_buffer(num_Character_Battle_Sprite_Layouts * 6)
@@ -298,7 +298,48 @@ func load_snes_rom(rom: File):
 
 	weapon_textures['Fist'] = texture_from_image(snes_get_tile(rom, offset_Tiles_Fist, 24))
 
+
+var json_sprite_blocks := Common.load_json('res://data/sprite_blocks.json')
+var sprite_blocks := {}
+func snes_load_map_sprites(rom: File):
+	# Main palettes
+	var map_palettes = []
+	for i in 4:
+		map_palettes.append(generate_palette(rom, 0x1FFC00 + 32*i))
+
+	for k in json_sprite_blocks.keys():
+		var v = json_sprite_blocks[k]
+		var start := int(v['start'])
+		var bpp := int(v['bpp'])
+		var definitions = v['definitions']
+		var total_tiles := 0
+		for defn in definitions:
+			total_tiles += defn[0] * defn[1] * defn[2]
+		print_debug('Processing sprite block "%s" - starts at $%06X with %d %dbpp tiles' % [k, start, total_tiles, bpp])
+		rom.seek(start)
+		var tiles := []
+		match bpp:
+			1:
+				for i in total_tiles:
+					tiles.append(snes_1plane_to_tile(rom.get_buffer(8)))
+			2:
+				for i in total_tiles:
+					tiles.append(snes_2plane_to_tile(rom.get_buffer(16)))
+			3:
+				for i in total_tiles:
+					tiles.append(snes_3plane_to_tile(rom.get_buffer(24)))
+			4:
+				for i in total_tiles:
+					tiles.append(snes_4plane_to_tile(rom.get_buffer(32)))
+			_:
+				print_debug('Invalid bpp "%s" in sprite blocks json' % bpp)
+		sprite_blocks[k] = tiles
+
+
+func load_snes_rom(rom: File):
+	snes_load_battle_sprites(rom)
 	snes_load_worldmap(rom)
+	snes_load_map_sprites(rom)
 
 
 const gba_marker := 'FINAL FANTASY V      ADVANCE    SYGMAB'