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Magick::Geometry

Constants

FLAGS
H
RE
RFLAGS
W

Construct an object from a geometry string

X
Y

Attributes

flag[RW]
height[RW]
width[RW]
x[RW]
y[RW]

Public Class Methods

from_s(str) click to toggle source
# File lib/RMagick.rb, line 98
def Geometry.from_s(str)

    m = RE.match(str)
    if m
        width  = (m[1] || m[2]).to_f
        height = (m[3] || m[4]).to_f
        x      = m[5].to_i
        y      = m[6].to_i
        flag   = RFLAGS[m[7]]
    else
        Kernel.raise ArgumentError, "invalid geometry format"
    end
    if str['%']
      flag = PercentGeometry
    end
    Geometry.new(width, height, x, y, flag)
end
new(width=nil, height=nil, x=nil, y=nil, flag=nil) click to toggle source
# File lib/RMagick.rb, line 62
def initialize(width=nil, height=nil, x=nil, y=nil, flag=nil)
    raise(ArgumentError, "width set to #{width.to_s}") if width.is_a? GeometryValue
    raise(ArgumentError, "height set to #{height.to_s}") if height.is_a? GeometryValue
    raise(ArgumentError, "x set to #{x.to_s}") if x.is_a? GeometryValue
    raise(ArgumentError, "y set to #{y.to_s}") if y.is_a? GeometryValue

    # Support floating-point width and height arguments so Geometry
    # objects can be used to specify Image#density= arguments.
    if width == nil
        @width = 0
    elsif width.to_f >= 0.0
        @width = width.to_f
    else
        Kernel.raise ArgumentError, "width must be >= 0: #{width}"
    end
    if height == nil
        @height = 0
    elsif height.to_f >= 0.0
        @height = height.to_f
    else
        Kernel.raise ArgumentError, "height must be >= 0: #{height}"
    end

    @x    = x.to_i
    @y    = y.to_i
    @flag = flag

end

Public Instance Methods

to_s() click to toggle source

Convert object to a geometry string

# File lib/RMagick.rb, line 117
def to_s
    str = ''
    if @width > 0
      fmt = @width.truncate == @width ? "%d" : "%.2f"
      str << sprintf(fmt, @width)
      str << '%' if @flag == PercentGeometry
    end

    if (@width > 0 && @flag != PercentGeometry) || (@height > 0)
      str << 'x'
    end

    if @height > 0
      fmt = @height.truncate == @height ? "%d" : "%.2f"
      str << sprintf(fmt, @height)
      str << '%' if @flag == PercentGeometry
    end
    str << sprintf("%+d%+d", @x, @y) if (@x != 0 || @y != 0)
    if @flag != PercentGeometry
      str << FLAGS[@flag.to_i]
    end
    str
end

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