generate font atlas texture

data/SNES_PSX_addresses.tsv

@@ -2,6 +2,7 @@ Label	SNES	PSX_file	PSX_offset	format	Comment
 character_battle_sprite_stone_palette	0x00F807	N/A	N/A	Palette16Of555	Also 0x199835
 character_battle_sprite_disabled_palette	0x00F867	/mnu/memsave.bin	0x000034	Palette16Of555	
 locations_bg_palettes	0x03BB00	/nar/ff5_binx.bin	0x03BF80	43 of Palette128Of555	
+font_glyphs_dialogue	0x03E800			256 of SNESTritile	length 0x1800
 enemy_battle_sprite_palettes	0x0ED000				See enemy_battle_sprite_data for pointers. Some are 8 colours instead of 16.
 worldmap_blocks	0x0FF0C0	/nar/ff5_binx.bin	0x040300	3 of 4 of 192 of u8	# Top-left corners, top-right corners, bottom-left corners, bottom-right corners
 worldmap_tiles.bias	0x0FF9C0	/nar/ff5_bin3.bin	0x03FB00	3 of 256 of u8	Add to each pixel of the mode7c tiles
@@ -38,6 +39,7 @@ attack_layouts	0x117FA0			5 of 2048 of u8	length 0x2400
 weapon_palettes	0x11A3A0				
 enemy_battle_status_sprite_palette	0x11A400			Palette16Of555	
 tiles_fist	0x11D710	/btl/ff5_btl.bin	0x021D10	TileSNES3bpp	Also /mnu/men_bin.eng:0x00D910
+font_glyphs_small	0x11F000			256 of TileSNES2bpp	length 0x1000
 character_battle_sprite_tiles	0x120000	/mnu/men_bin.eng	0x010200	5 of 22 of 48 of TileSNES4bpp	
 character_battle_sprite_palettes	0x14A3C0	/btl/ff5_btl.bin	0x0273C0	5 of 22 of Palette16Of555	Also /mnu/men_bin.eng:0x03A5C0
 enemy_battle_sprite_data	0x14B180			384 of EnemySpriteData	length 0x780
@@ -70,4 +72,5 @@ tiles_npcs	0x1A0000
 worldmap_tiles.0	0x1B8000	/nar/ff5_bin3.bin	0x039B00	256 of TileSNESMode7c	Add the biases
 worldmap_tiles.1	0x1BA000	/nar/ff5_bin3.bin	0x039B00	256 of TileSNESMode7c	Add the biases
 worldmap_tiles.2	0x1BC000	/nar/ff5_bin3.bin	0x039B00	128 of TileSNESMode7c	Add the biases
-					
+font_glyphs_kanji	0x1BD000			426 of SNESTritile	length of 0x27F0
+?	0x1BF800				

scripts/loaders/SpriteLoader.gd

@@ -7,6 +7,7 @@ const snes_battle_bgs := preload('res://scripts/loaders/snes/battle_bgs.gd')
 const gba_graphics := preload('res://scripts/loaders/gba/graphics.gd')
 var shader_material = load('res://palette_mat.tres')
 const TILE_RECT := Rect2(0, 0, 8, 8)
+const GLYPH_RECT := Rect2(0, 0, 16, 12)
 
 # Offsets
 
@@ -39,6 +40,8 @@ var character_battle_sprite_palette_textures = []
 var character_battle_sprite_palette_disabled_texture: ImageTexture
 var character_battle_sprite_palette_stone_texture: ImageTexture
 var weapon_textures = {}
+var font_atlas_image: Image
+var font_atlas_texture: ImageTexture
 
 var character_status_palette_replacements = {
 	'poison': {4: '$7EDB = #DEB5FF', 8: '$4DD3 = #9C739C'},  # Also kneel
@@ -143,6 +146,36 @@ static func make_tile_atlas(tile_images) -> Image:
 		image.blit_rect(tile_images[tile], TILE_RECT, Vector2((tile%16)*8, (tile/16)*8))
 	return image
 
+static func make_font_glyph_atlas(small_glyph_indexed_images, dialog_glyph_images, kanji_glyph_images) -> Image:
+	# Pack 256 small glyphs, 256 dialog glyphs, 426 kanji glyphs into a 512x512 atlas
+	var atlas = Image.new()
+	atlas.create(512, 512, false, Image.FORMAT_LA8)
+	for i in 256:
+		# First, convert indexed to LA8
+		var indexed: Image = small_glyph_indexed_images[i]
+		var data := PoolByteArray()
+		for pixel in indexed.get_data():
+			match pixel:
+				0:
+					data.append(0)
+					data.append(0xFF)
+				1:
+					data.append(0)
+					data.append(0)
+				2:
+					data.append(0x80)
+					data.append(0xFF)
+				3:
+					data.append(0xFF)
+					data.append(0xFF)
+		var tile = Image.new()
+		tile.create_from_data(8, 8, false, Image.FORMAT_LA8, data)
+		atlas.blit_rect(tile, TILE_RECT, Vector2((i%64)*8, (i/64)*8))
+	for i in 256:
+		atlas.blit_rect(dialog_glyph_images[i], GLYPH_RECT, Vector2((i%32)*16, (i/32)*12 + 32))
+	for i in 426:
+		atlas.blit_rect(kanji_glyph_images[i], GLYPH_RECT, Vector2((i%32)*16, (i/32)*12 + 128))
+	return atlas
 
 # func snes_load_worldmap(rom: File):
 # 	# Load Worldmap Graphics
@@ -501,6 +534,10 @@ func load_from_structs(data: Dictionary):
 
 	MapLoader.update_worldmap_block_tile_ids(worldmap_block_tile_ids)
 
+	# Make font atlas
+	self.font_atlas_image = make_font_glyph_atlas(data.font_glyphs_small, data.font_glyphs_dialogue, data.font_glyphs_kanji)
+	self.font_atlas_texture = texture_from_image(self.font_atlas_image)
+
 const gba_marker := 'FINAL FANTASY V      ADVANCE    SYGMAB'
 const gba_marker_pos_US := 0x12FE10
 const gba_marker_pos_EU := 0x131294

scripts/loaders/snes/graphics.gd

@@ -74,6 +74,24 @@ static func get_tile(rom: File, offset: int, length: int) -> Image:
 		_:
 			return _1plane_to_tile(data)
 
+static func get_tritile(buffer: StreamPeer) -> Image:
+	# Converts 1bpp planar font tile to 16bpp image for convenience.
+	var tdata := ByteArray(384)  # 16*12*2
+	for plane in 2:
+		for row in 12:
+			var byte = buffer.get_u8()
+			for bit in 8:
+				var idx: int = 2 * (bit + (plane*8) + (row*16))
+				if (byte >> (7-bit)) & 1:
+					tdata[idx] = 0xFF
+					tdata[idx+1] = 0xFF
+				else:
+					tdata[idx] = 0
+					tdata[idx+1] = 0
+	var tile := Image.new()
+	tile.create_from_data(16, 12, false, Image.FORMAT_LA8, tdata)
+	return tile
+
 static func bgr555_to_color(short: int) -> Color:
 	var color = Color()
 	color.a = 1

scripts/loaders/snes/structs.gd

@@ -28,6 +28,10 @@ class TileSNES1bpp extends STRUCT.StructType:
 	func get_value(buffer: StreamPeer, leftover_bits: Array):
 		return GRAPHICS._1plane_to_tile(buffer.get_data(8)[1])
 
+class SNESTritile extends STRUCT.StructType:  # Not TileSNESTritile as these are 16x12 not 8x8
+	func get_value(buffer: StreamPeer, leftover_bits: Array):
+		return GRAPHICS.get_tritile(buffer)
+
 class ColorBGR555 extends STRUCT.StructType:
 	func get_value(buffer: StreamPeer, leftover_bits: Array):
 		return GRAPHICS.bgr555_to_color(buffer.get_u16())
@@ -102,6 +106,7 @@ static func get_structtypes() -> Dictionary:
 		'TileSNES3bpp': TileSNES3bpp.new(),
 		'TileSNES2bpp': TileSNES2bpp.new(),
 		'TileSNES1bpp': TileSNES1bpp.new(),
+		'SNESTritile': SNESTritile.new(),
 		'ColorBGR555': ColorBGR555.new(),
 		'Palette16Of555': PaletteOf555.new(16),
 		'Palette128Of555': PaletteOf555.new(128),

test_scene.gd

@@ -49,6 +49,10 @@ func _ready():
 	bbg.align = LineEdit.ALIGN_RIGHT
 	add_child(bbg)
 
+	var fontbox := TextureRect.new()
+	fontbox.texture = SpriteLoader.font_atlas_texture
+	add_child(fontbox)
+
 	# var lbl = Label.new()
 	# for i in 22:
 	# 	lbl.text = lbl.text + '%s - %s\n' % [StringLoader.get_job_name(i), StringLoader.get_job_desc(i)]