I'm using this script in my project. Sometimes it works good and other times I get the following error:
I don't know why... Is there something wrong into the script?
#=============================================================================
# * SFonts
#=============================================================================
# Trickster
# Version 1.0
# 12.19.07
#=============================================================================
# Introduction
# - This script adds SFont support for rmxp. An sfont is a image file with
# characters already drawn onto it. The top row of pixels in this image shows
# where the characters are and where the breaks are.
# Setting up images
# - The top left hand pixel (0, 0) is the skip color and tells if a column
# of pixels is empty or contain data
# - Images should be placed in Graphics/SFonts
# - For more reference see the example image Arial_Text
# To Use
# - You can use this script in one of two ways
# - 1) Set <Bitmap>.sfont to an SFont object then call <Bitmap>.draw_text
# - 2) Call <SFont>.render(<String>) and then blt it to a Bitmap object
# Documentation
# - SFont.new(<String/Bitmap>, <Array>, <Integer/String>)
# - Where the first parameter is a filename (in Graphics/SFonts) or a Bitmap
# object containing the Font data
# - the second parameter is an Array of all of the characters in order in the
# file the default is specified in @@glyphs below you
# - the last parameter is either the width that should be used for the space
# character or the character whose width you want to use for the space
# character the default is " which is the width of the " character if "
# character is not in the glyph then the height of the bitmap will be used
# Credits
# - John Croisant for the original code for Rubygame which I used as a base for
# this script
# - Adam Bedore for the example sfont image more of his sfont work is given
# here - http://www.zlurp.com/irq/download.html
# Websites
# - Official SFont Page with sample fonts - http://www.linux-games.com/sfont
# - SFont generator utility - http://www.nostatic.org/sfont
# - SFont generator script for GIMP by Roger Feese
# http://www.nostatic.org/sfont/render-sfont22.scm
#=============================================================================
module RPG
module Cache
#--------------------------------------------------------------------------
# * SFont Load
#--------------------------------------------------------------------------
def self.sfont(file)
self.load_bitmap("Graphics/SFonts/", file)
end
end
end
class SFont
#--------------------------------------------------------------------------
# * Class Variables
#--------------------------------------------------------------------------
@@glyphs = [
"!",'"',"#","$","%","&","'","(",")","*","+",",","-",".","/","0",
"1","2","3","4","5","6","7","8","9",":",";","<","=",">","?","@",
"A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P",
"Q","R","S","T","U","V","W","X","Y","Z","[","\\","]","^","_","`",
"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p",
"q","r","s","t","u","v","w","x","y","z","{","|","}","~","∞",
]
#--------------------------------------------------------------------------
# * Get Glyphs
#--------------------------------------------------------------------------
def SFont.glyphs
return @@glyphs
end
#--------------------------------------------------------------------------
# * Object Initialization
#--------------------------------------------------------------------------
def initialize(file, glyphs = @@glyphs, space = '"')
if file.is_a?(String)
bitmap = RPG::Cache.sfont(file)
elsif file.is_a?(Bitmap)
bitmap = file
else
raise(ArgumentError, "File Must be a String or Bitmap")
end
@height = bitmap.height
@skip = bitmap.get_pixel(0, 0)
@glyphs = {}
x = 2
glyphs.each {|char| x = load_glyph(bitmap, char, x)}
unless glyphs.include?(' ')
if space.is_a?(Numeric)
space = space.to_i
elsif space.is_a?(String)
if glyphs.include?(space)
space = @glyphs[space].width
elsif !@glyphs['"'].nil?
space = @glyphs['"'].width
else
space = bitmap.height
end
else
raise(ArgumentError, "Space must be either a String or Numeric")
end
@glyphs[" "] = Bitmap.new(space, @height)
end
@glyphs.default = @glyphs[" "]
end
#--------------------------------------------------------------------------
# * Text Size
#--------------------------------------------------------------------------
def text_size(text)
width = 0
text.each_byte {|byte| width += @glyphs["%c" % byte].width}
return width
end
#--------------------------------------------------------------------------
# * Render
#--------------------------------------------------------------------------
def render(text)
width = text_size(text)
bitmap = Bitmap.new(width, @height)
x = 0
text.each_byte do |byte|
glyph = @glyphs["%c" % byte]
bitmap.blt(x, 0, glyph, glyph.rect)
x += glyph.width
end
return bitmap
end
#--------------------------------------------------------------------------
# * Private: Load glyph
#--------------------------------------------------------------------------
private
def load_glyph(bitmap, char, xi)
while bitmap.get_pixel(xi, 0) == @skip && xi < bitmap.width
xi += 1
end
return -1 if xi >= bitmap.width
xf = xi
while bitmap.get_pixel(xf, 0) != @skip && xf < bitmap.width
xf += 1
end
return -1 if xf >= bitmap.width
rect = Rect.new(xi, 0, xf - xi, bitmap.height)
@glyphs[char] = Bitmap.new(xf - xi, bitmap.height)
@glyphs[char].blt(0, 0, bitmap, rect)
return xf+1
end
end
class Rect
#--------------------------------------------------------------------------
# * Strict Conversion to Array
#--------------------------------------------------------------------------
def to_ary
return x, y, width, height
end
alias bounds to_ary
end
class Bitmap
#--------------------------------------------------------------------------
# * Public Instance Variables
#--------------------------------------------------------------------------
attr_accessor :sfont
#--------------------------------------------------------------------------
# * Draw Text
#--------------------------------------------------------------------------
alias_method :trick_sfont_bitmap_draw_text, :draw_text
def draw_text(*args)
if self.sfont == nil
trick_sfont_bitmap_draw_text(*args)
else
align = 0
case args.size
when 2
rect, text = args
x, y, width, height = rect
when 3
rect, text, align = args
x, y, width, height = rect
when 5
x, y, width, height, text = args
when 6
x, y, width, height, text, align = args
end
bitmap = sfont.render(text)
if align == 1
x += (width - bitmap.width) / 2
elsif align == 2
x += width - bitmap.width
end
y += (height - bitmap.height) / 2
blt(x, y, bitmap, bitmap.rect)
end
end
end