Add HexStringViewer

A test scene for visually scanning for strings within the ROM

data/SNES_PSX_addresses.tsv

@@ -74,3 +74,4 @@ worldmap_tiles.1	0x1BA000	/nar/ff5_bin3.bin	0x039B00	256 of TileSNESMode7c	Add t
 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				
+RPGe_font_character_widths	0x203225			512 of u8	RPGe only, Includes the 1px spacing

scripts/loaders/RomLoader.gd

@@ -17,6 +17,7 @@ var GBA_filename := '2564 - Final Fantasy V Advance (U)(Independent).gba'
 
 var rom_snes := File.new()
 var snes_data := {}
+var snes_bytes: PoolByteArray
 var thread := Thread.new()
 
 func load_snes_rom(filename: String):
@@ -24,7 +25,9 @@ func load_snes_rom(filename: String):
 	if error == OK:
 		# Copy entire SNES ROM to a buffer for StreamPeerBuffer usage.
 		# Unfortunately, the File API is different and slightly worse than the StreamPeer API.
-		var bytes := rom_snes.get_buffer(rom_snes.get_len())
+		var rom_size := rom_snes.get_len()
+		var bytes := rom_snes.get_buffer(rom_size)
+		self.snes_bytes = bytes
 		var buffer = StreamPeerBuffer.new()
 		buffer.data_array = bytes
 		# SpriteLoader.load_snes_rom(rom_snes)
@@ -35,7 +38,7 @@ func load_snes_rom(filename: String):
 		# Can concurrently work with the preloaded StreamPeerBuffer though
 		for key in Common.SNES_PSX_addresses:
 			var d = Common.SNES_PSX_addresses[key]
-			if d.format:
+			if d.format and (d.SNES < rom_size):  # Don't try to grab RPGe bank E0-E7 stuff from a smaller JP ROM
 				var s: STRUCT.StructType
 				if d.format in structdefs:
 					s = structdefs[d.format]

shaders/hex2font.gdshader

@@ -0,0 +1,20 @@
+shader_type canvas_item;
+uniform sampler2D glyph_atlas : hint_normal;
+uniform vec2 tilemap_size = vec2(32.0, 20.0);  // Update this to match the texture size
+
+// tile_atlas hardcoded to 64x4 tiles for now
+
+void fragment() {
+	// GLES2
+	vec2 xy = UV * tilemap_size;  // Texel-space coord of our texture
+	float t = texture(TEXTURE, UV).r;
+	int tile_idx = int(t * 255.0);  // Luminosity channel (any RGB channel works)
+	// Convert tile_idx to a texel coordinate, then to a UV coordinate
+	ivec2 tile_xy = ivec2(tile_idx%64, tile_idx/64);
+	vec2 tile_uv = vec2(tile_xy)/64.0;
+	// Get sub-tile UV
+	vec2 sub_tile_uv = fract(xy);
+	vec2 uv = tile_uv + (sub_tile_uv/64.0);
+
+	COLOR = texture(glyph_atlas, uv);
+}

test_scene.gd

@@ -35,12 +35,6 @@ func _ready():
 		t.material.set_shader_param('palette', mon.palette)
 		monster_box.add_child(t)
 
-	#var battle_bg := OptionButton.new()
-	#for i in len(SpriteLoader.battle_backgrounds):
-	#	battle_bg.add_item('BG %d' % i)
-	#battle_bg.connect('item_focused', $BattleScene, 'set_bg')
-	#battle_bg.connect('item_selected', $BattleScene, 'set_bg')
-	#add_child(battle_bg)
 	var bbg := SpinBox.new()
 	bbg.max_value = len(SpriteLoader.battle_backgrounds) - 1
 	bbg.connect('value_changed', $BattleScene, 'set_bg')
@@ -49,9 +43,9 @@ func _ready():
 	bbg.align = LineEdit.ALIGN_RIGHT
 	add_child(bbg)
 
-	var fontbox := TextureRect.new()
+#	var fontbox := TextureRect.new()
-	fontbox.texture = SpriteLoader.font_atlas_texture
+#	fontbox.texture = SpriteLoader.font_atlas_texture
-	add_child(fontbox)
+#	add_child(fontbox)
 
 	# var lbl = Label.new()
 	# for i in 22:
@@ -61,3 +55,5 @@ func _ready():
 	# for i in range(128, 161):
 	# 	lbl.text = lbl.text + '\n%s - %s' % [StringLoader.get_ability_name(i), StringLoader.get_ability_desc(i)]
 	# add_child(lbl)
+
+

widgets/HexStringViewer.gd

@@ -0,0 +1,56 @@
+extends Control
+const hex2font_shader := preload('res://shaders/hex2font.gdshader')
+
+var hexbox: TextureRect
+var hexbox_rows: int
+var hexbox_cols: int
+
+func make_hexview(data: PoolByteArray, width: int = 256):
+	var hex2font_mat := ShaderMaterial.new()
+	hex2font_mat.shader = hex2font_shader
+	hex2font_mat.set_shader_param('glyph_atlas', SpriteLoader.font_atlas_texture)
+	var hex_img := Image.new()
+
+	var l := len(RomLoader.snes_bytes)
+	self.hexbox_cols = width
+	self.hexbox_rows = l / self.hexbox_cols
+	var remainder = l % self.hexbox_cols
+	if remainder:
+		self.hexbox_rows += 1
+		var padding = PoolByteArray()
+		padding.resize(self.hexbox_cols - remainder)
+		padding.fill(0)
+		data = data + padding
+	hex2font_mat.set_shader_param('tilemap_size', Vector2(self.hexbox_cols, self.hexbox_rows))
+	hex_img.create_from_data(self.hexbox_cols, self.hexbox_rows, false, Image.FORMAT_L8, data)
+	hexbox = TextureRect.new()
+	hexbox.texture = SpriteLoader.texture_from_image(hex_img)
+	hexbox.material = hex2font_mat
+	hexbox.rect_scale *= 4
+	add_child(hexbox)
+
+func _ready() -> void:
+	ProjectSettings.set_setting('display/window/size/snap_to_integer', false)
+	make_hexview(RomLoader.snes_bytes, 480)
+
+func scroll_hexview(rows: int):
+	var current_row: int = (-hexbox.rect_position.y)/4
+	var next_row = current_row + rows
+	if next_row > (hexbox_rows - 270):
+		next_row = hexbox_rows - 270
+	if next_row < 0:
+		next_row = 0
+	hexbox.rect_position.y = -next_row * 4
+
+func _input(event: InputEvent) -> void:
+	if event is InputEventMouseButton:
+		match event.button_index:
+			BUTTON_WHEEL_DOWN:
+				scroll_hexview(16)
+			BUTTON_WHEEL_UP:
+				scroll_hexview(-16)
+	elif event is InputEventMouseMotion:
+		var row: int = (event.position.y - hexbox.rect_position.y) / 4
+		var col: int = event.position.x / 4
+		var address: int = col + (row * 480)
+		hexbox.set_tooltip('0x%06X' % address)

widgets/HexStringViewer.tscn

@@ -0,0 +1,8 @@
+[gd_scene load_steps=2 format=2]
+
+[ext_resource path="res://widgets/HexStringViewer.gd" type="Script" id=1]
+
+[node name="HexStringViewer" type="Control"]
+anchor_right = 1.0
+anchor_bottom = 1.0
+script = ExtResource( 1 )