private import dom
-import font
+intrude import font
# BMFont description, parsed with `Text::parse_bmfont` or loaded as a `BMFontAsset`
#
var face: Text
# Size of the source true type font
- var size: Int
+ var size: Float
# Is the font bold?
var bold: Bool
# Information common to all characters
# Distance in pixels between each line of text
- var line_height: Int
+ var line_height: Float
# Pixels from the top of the line to the base of the characters
- var base: Int
+ var base: Float
# Width of the texture
- var scale_w: Int
+ var scale_w: Float
# Height of the texture
- var scale_h: Int
+ var scale_h: Float
# Textures
var pages = new Map[String, TextureAsset]
var chars = new Map[Char, BMFontChar]
# Distance between certain characters
- var kernings = new HashMap2[Char, Char, Int]
+ var kernings = new HashMap2[Char, Char, Float]
+
+ # Additional distance between `prev_char` and `char`
+ fun kerning(prev_char: nullable Char, char: Char): Float
+ do
+ if prev_char == null then return 0.0
+ return kernings[prev_char, char] or else 0.0
+ end
redef fun to_s do return "<{class_name} {face} at {size} pt, "+
"{pages.length} pages, {chars.length} chars>"
class BMFontChar
# Subtexture left coordinate
- var x: Int
+ var x: Float
# Subtexture top coordinate
- var y: Int
+ var y: Float
# Subtexture width
- var width: Int
+ var width: Float
# Subtexture height
- var height: Int
+ var height: Float
# Drawing offset on X
- var xoffset: Int
+ var xoffset: Float
# Drawing offset on Y
- var yoffset: Int
+ var yoffset: Float
# Cursor advance after drawing this character
- var xadvance: Int
+ var xadvance: Float
# Full texture contaning this character and others
var page: TextureAsset
# """
#
# var fnt = desc.parse_bmfont("dir_in_assets").value
- # assert fnt.to_s == "<BMFont arial at 72 pt, 1 pages, 3 chars>"
- # assert fnt.line_height == 80
- # assert fnt.kernings['A', 'C'] == -1
+ # assert fnt.to_s == "<BMFont arial at 72.0 pt, 1 pages, 3 chars>"
+ # assert fnt.line_height == 80.0
+ # assert fnt.kernings['A', 'C'] == -1.0
# assert fnt.chars['A'].page.path == "dir_in_assets/arial.png"
# ~~~
fun parse_bmfont(dir: String): MaybeError[BMFont, Error]
var fnt = new BMFont(
info_map["face"],
- info_map["size"].to_i,
+ info_map["size"].to_f,
info_map["bold"] == "1",
info_map["italic"] == "1",
info_map["unicode"] == "1",
info_map["padding"],
info_map["spacing"],
- common_map["lineHeight"].to_i,
- common_map["base"].to_i,
- common_map["scaleW"].to_i,
- common_map["scaleH"].to_i
+ common_map["lineHeight"].to_f,
+ common_map["base"].to_f,
+ common_map["scaleW"].to_f,
+ common_map["scaleH"].to_f
)
# Pages / pixel data files
var id = attributes["id"].to_i.code_point
var c = new BMFontChar(
- attributes["x"].to_i, attributes["y"].to_i,
- attributes["width"].to_i, attributes["height"].to_i,
- attributes["xoffset"].to_i, attributes["yoffset"].to_i,
- attributes["xadvance"].to_i,
+ attributes["x"].to_f, attributes["y"].to_f,
+ attributes["width"].to_f, attributes["height"].to_f,
+ attributes["xoffset"].to_f, attributes["yoffset"].to_f,
+ attributes["xadvance"].to_f,
fnt.pages[attributes["page"]])
fnt.chars[id] = c
var attributes = item.attributes_to_map
var first = attributes["first"].to_i.code_point
var second = attributes["second"].to_i.code_point
- var amount = attributes["amount"].to_i
+ var amount = attributes["amount"].to_f
fnt.kernings[first, second] = amount
end
end
do
var dx = 0.0
var dy = 0.0
+ var text_width = 0.0
- var line_height = desc.line_height.to_f
+ var max_width = text_sprites.max_width
+ var max_height = text_sprites.max_height
- var prev_char = null
- for c in text do
+ var line_height = desc.line_height
+ var partial_line_skip = line_height * partial_line_mod.to_f
+ var line_sprites = new Array[Sprite]
- var partial_line_mod = 0.4
+ var prev_char = null
+ var i = -1
+ while i < text.length - 1 do
+ i += 1
+ var c = text[i]
# Special characters
+ var word_break = false
if c == '\n' then
- dy -= line_height.to_f
- dx = 0.0 #advance/2.0
+ justify(line_sprites, text_sprites.align, dx)
+ dy -= line_height
+ if max_height != null and max_height < -dy + line_height then break
+ dx = 0.0
prev_char = null
continue
else if c == pld then
- dy -= line_height * partial_line_mod.to_f
- prev_char = null
+ dy -= partial_line_skip
+ word_break = true
continue
else if c == plu then
- dy += line_height * partial_line_mod.to_f
- prev_char = null
+ dy += partial_line_skip
+ word_break = true
continue
else if c.is_whitespace then
- var advance = if desc.chars.keys.has(' ') then
- desc.chars[' '].xadvance.to_f
+ var space_advance = if desc.chars.keys.has(' ') then
+ desc.chars[' '].xadvance
else if desc.chars.keys.has('f') then
- desc.chars['f'].xadvance.to_f
+ desc.chars['f'].xadvance
else 16.0
- dx += advance
+ dx += space_advance
+ word_break = true
+ end
+
+ # End of a word?
+ if word_break then
+ # If we care about line width, check for overflow
+ if max_width != null then
+ # Calculate the length of the next word
+ var prev_w = null
+ var word_len = 0.0
+ for wi in [i+1..text.length[ do
+ var w = text[wi]
+
+ if w == '\n' or w == pld or w == plu or w.is_whitespace then break
+ word_len += advance(prev_w, w)
+ prev_w = w
+ end
+
+ # Would the line be too long?
+ if dx + word_len > max_width then
+ if text_sprites.wrap then
+ # Wrap
+ justify(line_sprites, text_sprites.align, dx)
+ dy -= line_height
+ if max_height != null and max_height < -dy + line_height then break
+ dx = 0.0
+ else
+ # Cut short
+ justify(line_sprites, text_sprites.align, dx)
+ dy -= line_height
+ if max_height != null and max_height < -dy + line_height then break
+ dx = 0.0
+ while c != '\n' and i < text.length - 1 do
+ i += 1
+ c = text[i]
+ end
+ end
+ end
+ end
+
prev_char = null
continue
end
end
var char_info = desc.chars[c]
- var advance = char_info.xadvance.to_f
-
- var kerning = 0.0
- if prev_char != null then
- kerning = (desc.kernings[prev_char, c] or else 0).to_f
- end
+ var advance = char_info.xadvance
+ var kerning = desc.kerning(prev_char, c)
- var x = dx + char_info.width.to_f/2.0 + char_info.xoffset.to_f + kerning
- var y = dy - char_info.height.to_f/2.0 - char_info.yoffset.to_f
+ var x = dx + char_info.width/2.0 + char_info.xoffset + kerning
+ var y = dy - char_info.height/2.0 - char_info.yoffset
var pos = text_sprites.anchor.offset(x, y, 0.0)
- text_sprites.sprites.add new Sprite(char_info.subtexture, pos)
+ var s = new Sprite(char_info.subtexture, pos)
+ text_sprites.sprites.add s
+ line_sprites.add s
dx += advance + kerning
prev_char = c
+
+ text_width = text_width.max(dx)
+ end
+
+ justify(line_sprites, text_sprites.align, dx)
+
+ # valign
+ if text_sprites.valign != 0.0 then
+ var d = (-dy+line_height) * text_sprites.valign
+ for s in text_sprites.sprites do s.center.y += d
end
+
+ text_sprites.width = text_width.max(dx)
+ text_sprites.height = dy + line_height
end
- # Character replacing other charactesr missing from the font
+ # Character replacing other characters missing from the font
private var replacement_char: nullable Char is lazy do
for c in "�?".chars do
if desc.chars.keys.has(c) then return c
end
return null
end
+
+ private fun advance(prev_char: nullable Char, char: Char): Float
+ do
+ var char_info = desc.chars[char]
+ var kerning = desc.kerning(prev_char, char)
+ return char_info.xadvance + kerning
+ end
+
+ private fun justify(line_sprites: Array[Sprite], align: Float, line_width: Float)
+ do
+ var dx = -line_width*align
+ for s in line_sprites do s.center.x += dx
+ line_sprites.clear
+ end
end
nitlanguage / nit.git / blobdiff