Constants
  
    Table of Contents
    Constants
    
    
    
   
  Constants
  Miscellaneous constants
  
    - Long_version
- An extended form of the Versionconstant with
    the format shown here:
 This is RMagick 2.0.0 ($Date: 2009/09/05 20:10:15 $)
    Copyright (C) 2008 by Timothy P. Hunter
 Built with ImageMagick 6.3.7 01/05/08 Q16
    http://www.imagemagick.org
 Built for ruby 1.8.6
 Web page: http://rmagick.rubyforge.org
 Email: rmagick@rubyforge.org
- Magick_version
- The ImageMagick version string. This has the form:
 @(#)ImageMagick X.Y.Z MM/DD/YY Q:16
    http://www.imagemagick.org
- MANAGED_MEMORY
- 
      If true, RMagick is using Ruby managed memory
      for all allocations. Iffalse, RMagick allocates
      memory for objects directly from the operating system. You
      can enable RMagick to use Ruby managed memory (when built
      with ImageMagick 6.4.0-11 and later) by setting
RMAGICK_ENABLE_MANAGED_MEMORY = true
 before requiring RMagick.
- QuantumRange
- The maximum value of a Quantum. A quantum is one
    of the red, green, blue, or opacity elements of a pixel in the
    RGB colorspace, or cyan, yellow, magenta, or black elements in
    the CYMK colorspace.
- MaxRGB (deprecated)
- Same as QuantumRange.
- QuantumDepth
- 
      The number of bits in a quantum. The relationship between
      QuantumDepth and QuantumRange is summarized in this table.
      
        
          | QuantumDepth | QuantumRange |  
          | 8 | 255 |  
          | 16 | 65535 |  
          | 32 | 4294967295 |  
 
- Version
- The RMagick version string. This has the form:
 RMagick 2.0.0
AlignType
  Specify text alignment. See align=, text_align.
  
    - UndefinedAlign
- No alignment specified. Equivalent to LeftAlign.
- LeftAlign
- Align the leftmost part of the text to the starting
    point.
- CenterAlign
- Center the text around the starting point.
- RightAlign
- Align the rightmost part of the text to the starting
    point.
ChannelType
  Specify an image channel. A channel is a color component of a
  pixel. In the RGB colorspace the channels are red, green, and
  blue. There may also be an alpha (transparency/opacity) channel.
  In the CMYK colorspace the channels area cyan, magenta, yellow,
  and black. In the HSL colorspace the channels are hue,
  saturation, and lightness. In the Gray colorspace the only
  channel is gray. See Image#channel and Image::Info#channel=.
  
    - UndefinedChannel
- RedChannel
- GreenChannel
- BlueChannel
- CyanChannel
- MagentaChannel
- YellowChannel
- BlackChannel
- OpacityChannel
- AllChannels
- In the RGB colorspace, the red, blue, green, and alpha
    channels. In the CMYK colorspace, the cyan, magenta, yellow,
    and black channels.
- GrayChannel
- AlphaChannel
- Same as OpacityChannel
- DefaultChannels
- Same as AllChannels, excluding OpacityChannel
- HueChannel
- LuminosityChannel
- SaturationChannel
ClassType
  Specify the image storage class. See class_type.
  
    - UndefinedClass
- No storage class has been specified.
- DirectClass
- Image is composed of pixels which represent
    literal color values.
- PseudoClass
- Image is composed of pixels which specify
    an index in a color palette.
ColorspaceType
  Specify the colorspace that quantization
  (color reduction and mapping) is done under or to specify the
  colorspace when encoding an output image. Colorspaces are ways of
  describing colors to fit the requirements of a particular
  application (e.g. Television, offset printing, color
  monitors).  Color reduction, by default, takes place in the
  RGBColorspace. Empirical evidence suggests that distances in
  color spaces such as YUVColorspace or YIQColorspace correspond to
  perceptual color differences more closely than do distances in
  RGB space. These color spaces may give better results when color
  reducing an image.
  When encoding an output image, the
  colorspaces RGBColorspace, CMYKColorspace, and GRAYColorspace may
  be specified. The CMYKColorspace option is only applicable when
  writing TIFF, JPEG, and Adobe Photoshop bitmap (PSD)
  files. See colorspace.
  Each version of ImageMagick defines a subset of the
  colorspaces listed below. To list the subset supported by your
  version, issue the command:
  
ruby -rRMagick -e"Magick::ColorspaceType.values {|cs| puts cs}"
  
    - UndefinedColorspace
- No colorspace has been specified.
- CMYColorspace
- CMYKColorspace
- Cyan-Magenta-Yellow-Black colorspace. CYMK
    is a subtractive color system used by printers and
    photographers for the rendering of colors with ink or emulsion,
    normally on a white surface.
- GRAYColorspace
- Full-range grayscale
- HSBColorspace
- HSLColorspace
- Hue, saturation, luminosity
- HWBColorspace
- Hue, whiteness, blackness
- LABColorspace
- LogColorspace
- OHTAColorspace
- RGBColorspace
- Red-Green-Blue colorspace
- SRGBColorspace
- Kodak PhotoCD sRGB. In ImageMagick, this constant is named
    sRGBColorspace, but since Ruby constants must start with an
    uppercase letter, I had to change it.
- TransparentColorspace
- The Transparent color space behaves
    uniquely in that it preserves the matte channel of the image if
    it exists.
- XYZColorspace
- CIE XYZ
- YCbCrColorspace
- YCCColorspace
- Kodak PhotoCD PhotoYCC
- YIQColorspace
- YPbPrColorspace
- YUVColorspace
- Y-signal, U-signal, and V-signal
    colorspace. YUV is most widely used to encode color for use in
    television transmission.
The colorspaces in this group are typically associated with
  the DPX and Cineon image formats used in the motion picture
  industry.
  
    - Rec601LumaColorspace
- Luma (Y) according to ITU-R 601
- Rec601YCbCrColorspace
- YCbCr according to ITU-R 601
- Rec709LumaColorspace
- Luma (Y) according to ITU-R 709
- Rec709YCbCrColorspace
- YCbCr according to ITU-R 709
ComplianceType
  Specify the color standard from which color names are chosen.
  See to_color.
  
    - SVGCompliance
- Adhere to SVG color standard.
- X11Compliance
- Adhere to X11 color standard.
- XPMCompliance
- Adhere to XPM color standard.
- AllCompliance
- The union of the 3 color standards.
CompositeOperator
  Select the image composition algorithm
  used to compose a composite image with a
  image. By default, each of the composite
  image pixels are replaced by the corresponding
  image tile pixel. Specify
  CompositeOperator to select a different
  algorithm. See composite.
  
    - UndefinedCompositeOp
- No composite operator has been specified.
- AddCompositeOp
- The result of composite image+image, with overflow wrapping around (mod
    256).
- AtopCompositeOp
- The result is the same shape as
    image, withcomposite imageobscuringimagewhere the image shapes overlap. Note that
    this differs from OverCompositeOp because the portion ofcomposite imageoutside ofimage's
    shape does not appear in the result.
- BlurCompositeOp
- ?
- BumpmapCompositeOp
- The result imageshaded bycomposite image.
- ChangeMaskCompositeOp
- Replace any destination pixel that is the
    similar to the source image's pixel (as defined by the current
    fuzz factor), with transparency.
- ClearCompositeOp
- Make the target image transparent. The composite image is
    ignored.
- ColorBurnCompositeOp
- Darkens the destination color to reflect
    the source color. Painting with white produces no change.
- ColorDodgeCompositeOp
- Brightens the destination color to reflect
    the source color. Painting with black produces no change.
- ColorizeCompositeOp
- Each pixel in the result image is the
    combination of the brightness of the target image and the
    saturation and hue of the composite image. This is the
    opposite of LuminizeCompositeOp.
- CopyCompositeOp
- Replace the target image with the composite image.
- CopyBlackCompositeOp
- Copy the black channel from the composite image to the
    target image.
- CopyBlueCompositeOp
- Copy the blue channel from the composite image to the
    target image.
- CopyCyanCompositeOp
- Copy the cyan channel from the composite image to the
    target image.
- CopyGreenCompositeOp
- Copy the green channel from the composite image to the
    target image.
- CopyMagentaCompositeOp
- Copy the magenta channel from the composite image to the
    target image.
- CopyOpacityCompositeOp
- If the composite image's matte attribute is
    true, copy the opacity channel from the composite
    image to the target image. Otherwise, set the target image
    pixel's opacity to the intensity of the corresponding pixel in
    the composite image.
- CopyRedCompositeOp
- Copy the red channel from the composite image to the target
    image.
- CopyYellowCompositeOp
- Copy the yellow channel from the composite image to the
    target image.
- DarkenCompositeOp
- Replace target image pixels with darker pixels from the
    composite image.
- DifferenceCompositeOp
- The result of abs(composite
    image-image). This is useful for
    comparing two very similar images.
- DisplaceCompositeOp
- Displace target image pixels as defined by a displacement
    map. The operator used by the displace method.
- DissolveCompositeOp
- The operator used in the dissolve method.
- DistortCompositeOp
- ?
- DivideCompositeOp
- ?
- DstCompositeOp
- The destination is left untouched.
- DstAtopCompositeOp
- The part of the destination lying inside of
    the source is composited over the source and replaces the
    destination.
- DstInCompositeOp
- The part of the destination lying inside of
    the source replaces the destination.
- DstOutCompositeOp
- The part of the destination lying outside
    of the source replaces the destination.
- DstOverCompositeOp
- The destination is composited over the
    source and the result replaces the destination.
- ExclusionCompositeOp
- Produces an effect similar to that of
    'difference', but appears as lower contrast. Painting with
    white inverts the destination color. Painting with black
    produces no change.
- HardLightCompositeOp
- Multiplies or screens the colors, dependent
    on the source color value. If the source color is lighter than
    0.5, the destination is lightened as if it were screened. If
    the source color is darker than 0.5, the destination is
    darkened, as if it were multiplied. The degree of lightening or
    darkening is proportional to the difference between the source
    color and 0.5. If it is equal to 0.5 the destination is
    unchanged. Painting with pure black or white produces black or
    white.
- HueCompositeOp
- Each pixel in the result image is the
    combination of the hue of the target image and the saturation
    and brightness of the composite image.
- InCompositeOp
- The result is simply composite
    imagecut by the shape ofimage. None of
    the image data ofimageis included in the
    result.
- LightenCompositeOp
- Replace target image pixels with lighter pixels from the
    composite image.
- LinearBurnCompositeOp
- Same as LinearDodgeCompositeOp, but also
    subtract one from the result. Sort of a additive 'Screen' of
    the images.
- LinearDodgeCompositeOp
- This is equivelent to
    PlusCompositeOpin that the color channels are
    simply added, however it does not "plus" the alpha channel, but
    uses the normalOverCompositeOpalpha blending,
    which transparencies are involved. Produces a sort of additive
    multiply-like result.
- LinearLightCompositeOp
- Increase contrast slightly with an impact
    on the foreground's tonal values.
- LuminizeCompositeOp
- Each pixel in the result image is the
    combination of the brightness of the composite image and the
    saturation and hue of the target image. This is the
    opposite of ColorizeCompositeOp.
- MinusCompositeOp
- The result of composite image - image, with
    overflow cropped to zero. The matte chanel is ignored (set to
    255, full coverage).
- ModulateCompositeOp
- Used by the watermark
    method.
- MultiplyCompositeOp
- Multiplies the color of each target image
    pixel by the color of the corresponding composite image pixel.
    The result color is always darker.
- NoCompositeOp
- No composite operator has been specified.
- OutCompositeOp
- The resulting image is composite
    imagewith the shape ofimagecut out.
- OverCompositeOp
- The result is the union of the the
    two image shapes with composite imageobscuringimagein the region of overlap. The matte
    channel of the composite image is respected, so that if the
    composite pixel is part or all transparent, the corresponding
    image pixel will show through.
- OverlayCompositeOp
- Multiplies or screens the colors, dependent
    on the destination color. Source colors overlay the destination
    whilst preserving its highlights and shadows. The destination
    color is not replaced, but is mixed with the source color to
    reflect the lightness or darkness of the destination.
- PegtopLightCompositeOp
- Almost equivalent to
    SoftLightCompositeOp, but using a continuious
    mathematical formula rather than two conditionally selected
    formulae.
- PinLightCompositeOp
- Similar to
    HardLightCompositeOp, but using sharp linear
    shadings, to similate the effects of a strong 'pinhole' light
    source.
- PlusCompositeOp
- The result is just the sum of the image
    data. Output values are cropped to 255 (no overflow). This
    operation is independent of the matte channels.
- ReplaceCompositeOp
- The resulting image is image replaced with
    composite image. Here the matte information is ignored.
- SaturateCompositeOp
- Each pixel in the result image is the combination of the
    saturation of the target image and the hue and brightness of
    the composite image.
- ScreenCompositeOp
- Multiplies the inverse of each image's color
    information.
- SoftLightCompositeOp
- Darkens or lightens the colors, dependent
    on the source color value. If the source color is lighter than
    0.5, the destination is lightened. If the source color is
    darker than 0.5, the destination is darkened, as if it were
    burned in. The degree of darkening or lightening is
    proportional to the difference between the source color and
    0.5. If it is equal to 0.5, the destination is unchanged.
    Painting with pure black or white produces a distinctly darker
    or lighter area, but does not result in pure black or
    white.
- SrcAtopCompositeOp
- The part of the source lying inside of the
    destination is composited onto the destination.
- SrcCompositeOp
- The source is copied to the destination.
    The destination is not used as input.
- SrcInCompositeOp
- he part of the source lying inside of the
    destination replaces the destination.
- SrcOutCompositeOp
- The part of the source lying outside of the
    destination replaces the destination.
- SrcOverCompositeOp
- The source is composited over the
    destination.
- SubtractCompositeOp
- The result of composite image-image, with underflow wrapping around (mod 256).
    The add and subtract operators can be used to perform
    reversable transformations.
- ThresholdCompositeOp
- ?
- VividLightCompositeOp
- A modified
    LinearLightCompositeOpdesigned to preserve very
    stong primary and secondary colors in the image.
- XorCompositeOp
- The result is the image data from both
    composite imageandimagethat is
    outside the overlap region. The overlap region will be
    blank.
CompressionType
  Express the desired compression type
  when encoding an image. Be aware that most image types only
  support a sub-set of the available compression types. If the
  compression type specified is incompatible with the image,
  ImageMagick selects a compression type compatible with the image
  type. See compression.
  
    - UndefinedCompression
- No compression type has been specified.
- NoCompression
- The default for most formats.
- B44Compression
- Available in ImageMagick 6.5.5-4 and later.
- B44ACompression
- Available in ImageMagick 6.5.5-4 and later.
- BZipCompression
- BZip (Burrows-Wheeler block-sorting text
    compression algorithm and Huffman coding) as used by bzip2
    utilities
- DXT1Compression
- Available in ImageMagick 6.3.9-3 and later.
- DXT3Compression
- Available in ImageMagick 6.3.9-3 and later.
- DXT5Compression
- Available in ImageMagick 6.3.9-3 and later.
- FaxCompression
- CCITT Group 3 FAX compression
- Group4Compression
- CCITT Group 4 FAX compression (used only
    for TIFF)
- JPEGCompression
- JPEG compression. See The JPEG image
    compression FAQ.
- JPEG2000Compression
- JPEG2000 compression for compressed PDF images.
- LosslessJPEGCompression
- This compression format is almost never used.
- LZWCompression
- Lempel-Ziv-Welch (LZW) compression
- PizCompression
- Available in ImageMagick 6.5.5-4 and later.
- Pxr24Compression
- Available in ImageMagick 6.5.5-4 and later.
- RLECompression
- See the Wikipedia page for Run-length
    encoding.
- ZipCompression
- Lempel-Ziv compression (LZ77) as used in
    PKZIP and GNU gzip.
- ZipSCompression
- Available in ImageMagick 6.5.5-4 and later.
DecorationType
  Use with the decorate= method
  in the Draw class to specify the text decoration for the annotate method.
  
    - NoDecoration
- Don't decorate the text.
- UnderlineDecoration
- Underline the text.
- OverlineDecoration
- Overline the text.
- LineThroughDecoration
- Draw a horizontal line through the middle of the text.
DisposeType
  The value of the dispose
  attribute.
  
    - UndefinedDispose
- No disposal specified.
- NoneDispose
- Do not dispose between frames.
- BackgroundDispose
- Overwrite the image area with the background color.
- PreviousDispose
- Overwrite the image area with what was there prior to
    rendering the image.
DitherMethod
  Specify the method of dithering for remap, quantize, posterize, etc.
  
    - NoDitherMethod
- RiemersmaDitherMethod
- FloydSteinbergDitherMethod
EndianType
  The value of the endian
  attribute.
  
    - UndefinedEndian
- LSBEndian
- MSBEndian
FilterTypes
  Used to adjust the filter algorithm used
  when resizing images. Different filters experience varying
  degrees of success with various images and can take significantly
  different amounts of processing time. ImageMagick uses the
  LanczosFilter by default since this filter has been shown to
  provide the best results for most images in a reasonable amount
  of time. Other filter types (e.g. TriangleFilter) may execute
  much faster but may show artifacts when the image is re-sized or
  around diagonal lines. The only way to be sure is to test the
  filter with sample images. See resize.
  
    - UndefinedFilter
- Bartlett
- BesselFilter
- BlackmanFilter
- Bohman
- BoxFilter
- CatromFilter
- CubicFilter
- GaussianFilter
- HammingFilter
- HanningFilter
- HermiteFilter
- KaiserFilter
- LagrangianFilter
- LanczosFilter
- MitchellFilter
- ParzenFilter
- PointFilter
- QuadraticFilter
- SincFilter
- TriangleFilter
- WelshFilter
GravityType
  Specify positioning of an object (e.g.
  text, image) within a bounding region (e.g. an image). Gravity
  provides a convenient way to locate objects irrespective of the
  size of the bounding region, in other words, you don't need to
  provide absolute coordinates in order to position an object. A
  common default for gravity is NorthWestGravity.
  See annotate and composite.
  
    - ForgetGravity
- Don't use gravity.
- NorthWestGravity
- Position object at top-left of region
- NorthGravity
- Position object at top-center of
    region
- NorthEastGravity
- Position object at top-right of region
- WestGravity
- Position object at left-center of
    region
- CenterGravity
- Position object at center of region
- EastGravity
- Position object at right-center of
    region
- SouthWestGravity
- Position object at left-bottom of
    region
- SouthGravity
- Position object at bottom-center of
    region
- SouthEastGravity
- Position object at bottom-right of
    region
ImageType
  Indicate the type classification of the
  image. See image_type and image_type=.
  
    - UndefinedType
- No type has been specified.
- BilevelType
- Monochrome image
- GrayscaleType
- Grayscale image
- PaletteType
- Indexed color (palette) image
- PaletteMatteType
- Indexed color (palette) image with
    opacity
- TrueColorType
- Truecolor image
- TrueColorMatteType
- Truecolor image with opacity
- ColorSeparationType
- Cyan/Yellow/Magenta/Black (CYMK) image
- ColorSeparationMatteType
- OptimizeType
- PaletteBilevelMatteType
InterlaceType
  Specify the ordering of the red, green,
  and blue pixel information in the image. Interlacing is usually
  used to make image information available to the user faster by
  taking advantage of the space vs time tradeoff. For example,
  interlacing allows images on the Web to be recognizable sooner
  and satellite images to accumulate/render with image resolution
  increasing over time. Use LineInterlace or
  PlaneInterlace to create an interlaced GIF or
  progressive JPEG image. See interlace.
  
    - UndefinedInterlace
- No interlace type has been specified.
- NoInterlace
- Don't interlace image
    (RGBRGBRGBRGBRGBRGB...)
- LineInterlace
- Use scanline interlacing
    (RRR...GGG...BBB...RRR...GGG...BBB...)
- PlaneInterlace
- Use plane interlacing
    (RRRRRR...GGGGGG...BBBBBB...)
- PartitionInterlace
- Similar to plane interlacing except that
    the different planes are saved to individual files (e.g.
    image.R, image.G, and image.B)
- GIFInterlace
- JPEGInterlace
- PNGInterlace
- See the ImageMagick documentation for the -interlace
    option.
  InterpolatePixelMethod
  The pixel color interpolation method. See pixel_interpolation_method.
  
    - AverageInterpolatePixel
- BicubicInterpolatePixel
- BilinearInterpolatePixel
- FilterInterpolatePixel
- IntegerInterpolatePixel
- MeshInterpolatePixel
- NearestNeighborInterpolatePixel
- SplineInterpolatePixel
For FilterInterpolatePixel, specify the filter with the
  filter attribute. Specify
  the sharpness with the blur
  attribute.
  MetricType
  The distortion metric type. See compare_channel, distortion_channel.
  
    - MeanAbsoluteErrorMetric
- MeanSquaredErrorMetric
- PeakAbsoluteErrorMetric
- PeakSignalToNoiseRatioMetric
- RootMeanSquaredErrorMetric
NoiseType
  Select the type of noise to be added to
  the image. See add_noise.
  
    - UniformNoise
- GaussianNoise
- MultiplicativeGaussianNoise
- ImpulseNoise
- LaplacianNoise
- PoissonNoise
- RandomNoise
Opacity
  represent the maximum and minimum levels of opacity. You can
  specify a partial level of opacity by choosing a number between
  OpaqueOpacity and TransparentOpacity. For example, 25% opacity is
  abs(Magick::TransparentOpacity-Magick::OpaqueOpacity) *
  0.25
  
    - TransparentOpacity
- The minimum amount of opacity.
- OpaqueOpacity
- The maximum amount of opacity.
OrientationType
  Specify the orientation of the image pixels. See Image#orientation and Info#orientation. See http://jpegclub.org/exif_orientation.html
  for an explanation of these values.
  
    - UndefinedOrientation
- TopLeftOrientation
- TopRightOrientation
- BottomRightOrientation
- BottomLeftOrientation
- LeftTopOrientation
- RightTopOrientation
- RightBottomOrientation
- LeftBottomOrientation
PaintMethod
  Specify how pixel colors are to be replaced in
  the image. See matte_floodfill and texture_floodfill.
  
    - PointMethod
- Replace pixel color at point.
- ReplaceMethod
- Replace color for all image pixels matching
    color at point.
- FloodfillMethod
- Replace color for pixels surrounding point
    until encountering pixel that fails to match color at
    point.
- FillToBorderMethod
- Replace color for pixels surrounding point
    until encountering pixels matching border color.
- ResetMethod
- Replace colors for all
    pixels in image with fill color.
RenderingIntent
  Rendering intent is a concept defined by
  ICC Spec ICC.1:1998-09, "File Format for Color Profiles".
  ImageMagick uses RenderingIntent in order to support ICC Color
  Profiles.
  From the specification: "Rendering intent
  specifies the style of reproduction to be used during the
  evaluation of this profile in a sequence of profiles. It applies
  specifically to that profile in the sequence and not to the
  entire sequence. Typically, the user or application will set the
  rendering intent dynamically at runtime or embedding time."
  See rendering_intent.
  
    - UndefinedIntent
- No intent has been specified.
- SaturationIntent
- A rendering intent that specifies the
    saturation of the pixels in the image is preserved perhaps at
    the expense of accuracy in hue and lightness.
- PerceptualIntent
- A rendering intent that specifies the full
    gamut of the image is compressed or expanded to fill the gamut
    of the destination device. Gray balance is preserved but
    colorimetric accuracy might not be preserved.
- AbsoluteIntent
- Absolute colorimetric
- RelativeIntent
- Relative colorimetric
ResolutionType
  By default, ImageMagick defines
  resolutions in pixels per inch. ResolutionType provides a means
  to adjust this. See units.
  
    - UndefinedResolution
- No resolution has been specified.
- PixelsPerInchResolution
- Density specifications are specified in
    units of pixels per inch (English units).
- PixelsPerCentimeterResolution
- Density specifications are specified in
    units of pixels per centimeter (metric units).
StretchType
  See font_stretch=.
  
    - NormalStretch
- UltraCondensedStretch
- ExtraCondensedStretch
- CondensedStretch
- SemiCondensedStretch
- SemiExpandedStretch
- ExpandedStretch
- ExtraExpandedStretch
- UltraExpandedStretch
- AnyStretch
StorageType
  See import_pixels and
  export_pixels_to_str.
  
    - CharPixel
- corresponds to a C unsigned char, range
    0-255.
- ShortPixel
- corresponds to a C unsigned short, range
    0-65535.
- IntegerPixel
- corresponds to a C unsigned int, range
    0-4294967295.
- LongPixel
- corresponds to a C unsigned long, range
    0-4294967295 (for 32-bit longs).
- FloatPixel
- corresponds to a C float, range 0.0-1.0.
- DoublePixel
- corresponds to a C double, range 0.0-1.0.
- QuantumPixel
- corresponds to the Quantum type used by ImageMagick, range
    0-QuantumRange.
StyleType
  See font_style=.
  
    - NormalStyle
- ItalicStyle
- ObliqueStyle
- AnyStyle
WeightType
  The font weight can be specified as one of 100, 200, 300, 400,
  500, 600, 700, 800, or 900, or one of the following constants.
  See font_weight=.
  
    - AnyWeight
- No weight specified.
- NormalWeight
- Equivalent to 400
- BoldWeight
- Equivalent to 700
- BolderWeight
- Increases weight by 100
- LighterWeight
- Decreases weight by 100