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ImageMagick
PHP Manual

# Predefined Constants

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.

COLOR_* constants

Colortype constants. These constants are mainly used with ImagickPixel.

`imagick::COLOR_BLACK` (integer)
  Black color
`imagick::COLOR_BLUE` (integer)
  Blue color
`imagick::COLOR_CYAN` (integer)
  Cyan color
`imagick::COLOR_GREEN` (integer)
  Green color
`imagick::COLOR_RED` (integer)
  Red color
`imagick::COLOR_YELLOW` (integer)
  Yellow color
`imagick::COLOR_MAGENTA` (integer)
  Magenta color
`imagick::COLOR_OPACITY` (integer)
  Color's opacity
`imagick::COLOR_ALPHA` (integer)
  Color's alpha
`imagick::COLOR_FUZZ` (integer)
  Color's fuzz

DISPOSE constants

Dispose type constants

`imagick::DISPOSE_UNRECOGNIZED` (integer)
  Unrecognized dispose type
`imagick::DISPOSE_UNDEFINED` (integer)
  Undefined dispose type
`imagick::DISPOSE_NONE` (integer)
  No dispose type defined
`imagick::DISPOSE_BACKGROUND` (integer)
  Dispose background
`imagick::DISPOSE_PREVIOUS` (integer)
  Dispose previous

Composite Operator Constants
`imagick::COMPOSITE_DEFAULT` (integer)
  The default composite operator
`imagick::COMPOSITE_UNDEFINED` (integer)
  Undefined composite operator
`imagick::COMPOSITE_NO` (integer)
  No composite operator defined
`imagick::COMPOSITE_ADD` (integer)
  The result of image + image
`imagick::COMPOSITE_ATOP` (integer)
  The result is the same shape as image, with composite image obscuring image where the image shapes overlap
`imagick::COMPOSITE_BLEND` (integer)
  Blends the image
`imagick::COMPOSITE_BUMPMAP` (integer)
  The same as COMPOSITE_MULTIPLY, except the source is converted to grayscale first.
`imagick::COMPOSITE_CLEAR` (integer)
  Makes the target image transparent
`imagick::COMPOSITE_COLORBURN` (integer)
  Darkens the destination image to reflect the source image
`imagick::COMPOSITE_COLORDODGE` (integer)
  Brightens the destination image to reflect the source image
`imagick::COMPOSITE_COLORIZE` (integer)
  Colorizes the target image using the composite image
`imagick::COMPOSITE_COPYBLACK` (integer)
  Copies black from the source to target
`imagick::COMPOSITE_COPYBLUE` (integer)
  Copies blue from the source to target
`imagick::COMPOSITE_COPY` (integer)
  Copies the source image on the target image
`imagick::COMPOSITE_COPYCYAN` (integer)
  Copies cyan from the source to target
`imagick::COMPOSITE_COPYGREEN` (integer)
  Copies green from the source to target
`imagick::COMPOSITE_COPYMAGENTA` (integer)
  Copies magenta from the source to target
`imagick::COMPOSITE_COPYOPACITY` (integer)
  Copies opacity from the source to target
`imagick::COMPOSITE_COPYRED` (integer)
  Copies red from the source to target
`imagick::COMPOSITE_COPYYELLOW` (integer)
  Copies yellow from the source to target
`imagick::COMPOSITE_DARKEN` (integer)
  Darkens the target image
`imagick::COMPOSITE_DSTATOP` (integer)
  The part of the destination lying inside of the source is composited over the source and replaces the destination
`imagick::COMPOSITE_DST` (integer)
  The target is left untouched
`imagick::COMPOSITE_DSTIN` (integer)
  The parts inside the source replace the target
`imagick::COMPOSITE_DSTOUT` (integer)
  The parts outside the source replace the target
`imagick::COMPOSITE_DSTOVER` (integer)
  Target replaces the source
`imagick::COMPOSITE_DIFFERENCE` (integer)
  Subtracts the darker of the two constituent colors from the lighter
`imagick::COMPOSITE_DISPLACE` (integer)
  Shifts target image pixels as defined by the source
`imagick::COMPOSITE_DISSOLVE` (integer)
  Dissolves the source in to the target
`imagick::COMPOSITE_EXCLUSION` (integer)
  Produces an effect similar to that of imagick::COMPOSITE_DIFFERENCE, but appears as lower contrast
`imagick::COMPOSITE_HARDLIGHT` (integer)
  Multiplies or screens the colors, dependent on the source color value
`imagick::COMPOSITE_HUE` (integer)
  Modifies the hue of the target as defined by source
`imagick::COMPOSITE_IN` (integer)
  Composites source into the target
`imagick::COMPOSITE_LIGHTEN` (integer)
  Lightens the target as defined by source
`imagick::COMPOSITE_LUMINIZE` (integer)
  Luminizes the target as defined by source
`imagick::COMPOSITE_MINUS` (integer)
  Subtracts the source from the target
`imagick::COMPOSITE_MODULATE` (integer)
  Modulates the target brightness, saturation and hue as defined by source
`imagick::COMPOSITE_MULTIPLY` (integer)
  Multiplies the target to the source
`imagick::COMPOSITE_OUT` (integer)
  Composites outer parts of the source on the target
`imagick::COMPOSITE_OVER` (integer)
  Composites source over the target
`imagick::COMPOSITE_OVERLAY` (integer)
  Overlays the source on the target
`imagick::COMPOSITE_PLUS` (integer)
  Adds the source to the target
`imagick::COMPOSITE_REPLACE` (integer)
  Replaces the target with the source
`imagick::COMPOSITE_SATURATE` (integer)
  Saturates the target as defined by the source
`imagick::COMPOSITE_SCREEN` (integer)
  The source and destination are complemented and then multiplied and then replace the destination
`imagick::COMPOSITE_SOFTLIGHT` (integer)
  Darkens or lightens the colors, dependent on the source
`imagick::COMPOSITE_SRCATOP` (integer)
  The part of the source lying inside of the destination is composited onto the destination
`imagick::COMPOSITE_SRC` (integer)
  The source is copied to the destination
`imagick::COMPOSITE_SRCIN` (integer)
  The part of the source lying inside of the destination replaces the destination
`imagick::COMPOSITE_SRCOUT` (integer)
  The part of the source lying outside of the destination replaces the destination
`imagick::COMPOSITE_SRCOVER` (integer)
  The source replaces the destination
`imagick::COMPOSITE_SUBTRACT` (integer)
  Subtract the colors in the source image from the destination image
`imagick::COMPOSITE_THRESHOLD` (integer)
  The source is composited on the target as defined by source threshold
`imagick::COMPOSITE_XOR` (integer)
  The part of the source that lies outside of the destination is combined with the part of the destination that lies outside of the source

MONTAGEMODE constants

`imagick::MONTAGEMODE_FRAME` (integer)
`imagick::MONTAGEMODE_UNFRAME` (integer)
`imagick::MONTAGEMODE_CONCATENATE` (integer)

STYLE constants

`imagick::STYLE_NORMAL` (integer)
`imagick::STYLE_ITALIC` (integer)
`imagick::STYLE_OBLIQUE` (integer)
`imagick::STYLE_ANY` (integer)

FILTER constants

`imagick::FILTER_UNDEFINED` (integer)
`imagick::FILTER_POINT` (integer)
`imagick::FILTER_BOX` (integer)
`imagick::FILTER_TRIANGLE` (integer)
`imagick::FILTER_HERMITE` (integer)
`imagick::FILTER_HANNING` (integer)
`imagick::FILTER_HAMMING` (integer)
`imagick::FILTER_BLACKMAN` (integer)
`imagick::FILTER_GAUSSIAN` (integer)
`imagick::FILTER_QUADRATIC` (integer)
`imagick::FILTER_CUBIC` (integer)
`imagick::FILTER_CATROM` (integer)
`imagick::FILTER_MITCHELL` (integer)
`imagick::FILTER_LANCZOS` (integer)
`imagick::FILTER_BESSEL` (integer)
`imagick::FILTER_SINC` (integer)

IMGTYPE constants

`imagick::IMGTYPE_UNDEFINED` (integer)
`imagick::IMGTYPE_BILEVEL` (integer)
`imagick::IMGTYPE_GRAYSCALE` (integer)
`imagick::IMGTYPE_GRAYSCALEMATTE` (integer)
`imagick::IMGTYPE_PALETTE` (integer)
`imagick::IMGTYPE_PALETTEMATTE` (integer)
`imagick::IMGTYPE_TRUECOLOR` (integer)
`imagick::IMGTYPE_TRUECOLORMATTE` (integer)
`imagick::IMGTYPE_COLORSEPARATION` (integer)
`imagick::IMGTYPE_COLORSEPARATIONMATTE` (integer)
`imagick::IMGTYPE_OPTIMIZE` (integer)

RESOLUTION constants

`imagick::RESOLUTION_UNDEFINED` (integer)
`imagick::RESOLUTION_PIXELSPERINCH` (integer)
`imagick::RESOLUTION_PIXELSPERCENTIMETER` (integer)

COMPRESSION constants

`imagick::COMPRESSION_UNDEFINED` (integer)
`imagick::COMPRESSION_NO` (integer)
`imagick::COMPRESSION_BZIP` (integer)
`imagick::COMPRESSION_FAX` (integer)
`imagick::COMPRESSION_GROUP4` (integer)
`imagick::COMPRESSION_JPEG` (integer)
`imagick::COMPRESSION_JPEG2000` (integer)
`imagick::COMPRESSION_LOSSLESSJPEG` (integer)
`imagick::COMPRESSION_LZW` (integer)
`imagick::COMPRESSION_RLE` (integer)
`imagick::COMPRESSION_ZIP` (integer)
`imagick::COMPRESSION_DXT1` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.0 or higher.
`imagick::COMPRESSION_DXT3` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.0 or higher.
`imagick::COMPRESSION_DXT5` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.0 or higher.

PAINT constants

`imagick::PAINT_POINT` (integer)
`imagick::PAINT_REPLACE` (integer)
`imagick::PAINT_FLOODFILL` (integer)
`imagick::PAINT_FILLTOBORDER` (integer)
`imagick::PAINT_RESET` (integer)

GRAVITY constants

`imagick::GRAVITY_NORTHWEST` (integer)
`imagick::GRAVITY_NORTH` (integer)
`imagick::GRAVITY_NORTHEAST` (integer)
`imagick::GRAVITY_WEST` (integer)
`imagick::GRAVITY_CENTER` (integer)
`imagick::GRAVITY_EAST` (integer)
`imagick::GRAVITY_SOUTHWEST` (integer)
`imagick::GRAVITY_SOUTH` (integer)
`imagick::GRAVITY_SOUTHEAST` (integer)

STRETCH constants

`imagick::STRETCH_NORMAL` (integer)
`imagick::STRETCH_ULTRACONDENSED` (integer)
`imagick::STRETCH_CONDENSED` (integer)
`imagick::STRETCH_SEMICONDENSED` (integer)
`imagick::STRETCH_SEMIEXPANDED` (integer)
`imagick::STRETCH_EXPANDED` (integer)
`imagick::STRETCH_EXTRAEXPANDED` (integer)
`imagick::STRETCH_ULTRAEXPANDED` (integer)
`imagick::STRETCH_ANY` (integer)

ALIGN constants

`imagick::ALIGN_UNDEFINED` (integer)
`imagick::ALIGN_LEFT` (integer)
`imagick::ALIGN_CENTER` (integer)
`imagick::ALIGN_RIGHT` (integer)

DECORATION constants

`imagick::DECORATION_NO` (integer)
`imagick::DECORATION_UNDERLINE` (integer)
`imagick::DECORATION_OVERLINE` (integer)
`imagick::DECORATION_LINETROUGH` (integer)

NOISE constants

`imagick::NOISE_UNIFORM` (integer)
`imagick::NOISE_GAUSSIAN` (integer)
`imagick::NOISE_MULTIPLICATIVEGAUSSIAN` (integer)
`imagick::NOISE_IMPULSE` (integer)
`imagick::NOISE_LAPLACIAN` (integer)
`imagick::NOISE_POISSON` (integer)
`imagick::NOISE_RANDOM` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.6 or higher.

CHANNEL constants

`imagick::CHANNEL_UNDEFINED` (integer)
`imagick::CHANNEL_RED` (integer)
`imagick::CHANNEL_GRAY` (integer)
`imagick::CHANNEL_CYAN` (integer)
`imagick::CHANNEL_GREEN` (integer)
`imagick::CHANNEL_MAGENTA` (integer)
`imagick::CHANNEL_BLUE` (integer)
`imagick::CHANNEL_YELLOW` (integer)
`imagick::CHANNEL_ALPHA` (integer)
`imagick::CHANNEL_OPACITY` (integer)
`imagick::CHANNEL_MATTE` (integer)
`imagick::CHANNEL_BLACK` (integer)
`imagick::CHANNEL_INDEX` (integer)
`imagick::CHANNEL_ALL` (integer)
`imagick::CHANNEL_DEFAULT` (integer)

METRIC constants

`imagick::METRIC_UNDEFINED` (integer)
`imagick::METRIC_MEANABSOLUTEERROR` (integer)
`imagick::METRIC_MEANSQUAREERROR` (integer)
`imagick::METRIC_PEAKABSOLUTEERROR` (integer)
`imagick::METRIC_PEAKSIGNALTONOISERATIO` (integer)
`imagick::METRIC_ROOTMEANSQUAREDERROR` (integer)

PIXEL constants

`imagick::PIXEL_CHAR` (integer)
`imagick::PIXEL_DOUBLE` (integer)
`imagick::PIXEL_FLOAT` (integer)
`imagick::PIXEL_INTEGER` (integer)
`imagick::PIXEL_LONG` (integer)
`imagick::PIXEL_QUANTUM` (integer)
`imagick::PIXEL_SHORT` (integer)

EVALUATE constants

`imagick::EVALUATE_UNDEFINED` (integer)
`imagick::EVALUATE_ADD` (integer)
`imagick::EVALUATE_AND` (integer)
`imagick::EVALUATE_DIVIDE` (integer)
`imagick::EVALUATE_LEFTSHIFT` (integer)
`imagick::EVALUATE_MAX` (integer)
`imagick::EVALUATE_MIN` (integer)
`imagick::EVALUATE_MULTIPLY` (integer)
`imagick::EVALUATE_OR` (integer)
`imagick::EVALUATE_RIGHTSHIFT` (integer)
`imagick::EVALUATE_SET` (integer)
`imagick::EVALUATE_SUBTRACT` (integer)
`imagick::EVALUATE_XOR` (integer)
`imagick::EVALUATE_POW` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.4 or higher.
`imagick::EVALUATE_LOG` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.4 or higher.
`imagick::EVALUATE_THRESHOLD` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.4 or higher.
`imagick::EVALUATE_THRESHOLDBLACK` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.4 or higher.
`imagick::EVALUATE_THRESHOLDWHITE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.4 or higher.
`imagick::EVALUATE_GAUSSIANNOISE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.4 or higher.
`imagick::EVALUATE_IMPULSENOISE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.4 or higher.
`imagick::EVALUATE_LAPLACIANNOISE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.4 or higher.
`imagick::EVALUATE_MULTIPLICATIVENOISE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.4 or higher.
`imagick::EVALUATE_POISSONNOISE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.4 or higher.
`imagick::EVALUATE_UNIFORMNOISE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.4 or higher.
`imagick::EVALUATE_COSINE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.4 or higher.
`imagick::EVALUATE_SINE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.4 or higher.
`imagick::EVALUATE_ADDMODULUS` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.4 or higher.

COLORSPACE constants

`imagick::COLORSPACE_UNDEFINED` (integer)
`imagick::COLORSPACE_RGB` (integer)
`imagick::COLORSPACE_GRAY` (integer)
`imagick::COLORSPACE_TRANSPARENT` (integer)
`imagick::COLORSPACE_OHTA` (integer)
`imagick::COLORSPACE_LAB` (integer)
`imagick::COLORSPACE_XYZ` (integer)
`imagick::COLORSPACE_YCBCR` (integer)
`imagick::COLORSPACE_YCC` (integer)
`imagick::COLORSPACE_YIQ` (integer)
`imagick::COLORSPACE_YPBPR` (integer)
`imagick::COLORSPACE_YUV` (integer)
`imagick::COLORSPACE_CMYK` (integer)
`imagick::COLORSPACE_SRGB` (integer)
`imagick::COLORSPACE_HSB` (integer)
`imagick::COLORSPACE_HSL` (integer)
`imagick::COLORSPACE_HWB` (integer)
`imagick::COLORSPACE_REC601LUMA` (integer)
`imagick::COLORSPACE_REC709LUMA` (integer)
`imagick::COLORSPACE_LOG` (integer)
`imagick::COLORSPACE_CMY` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.2 or higher.

VIRTUALPIXELMETHOD constants

`imagick::VIRTUALPIXELMETHOD_UNDEFINED` (integer)
`imagick::VIRTUALPIXELMETHOD_BACKGROUND` (integer)
`imagick::VIRTUALPIXELMETHOD_CONSTANT` (integer)
`imagick::VIRTUALPIXELMETHOD_EDGE` (integer)
`imagick::VIRTUALPIXELMETHOD_MIRROR` (integer)
`imagick::VIRTUALPIXELMETHOD_TILE` (integer)
`imagick::VIRTUALPIXELMETHOD_TRANSPARENT` (integer)
`imagick::VIRTUALPIXELMETHOD_MASK` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.2 or higher.
`imagick::VIRTUALPIXELMETHOD_BLACK` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.2 or higher.
`imagick::VIRTUALPIXELMETHOD_GRAY` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.2 or higher.
`imagick::VIRTUALPIXELMETHOD_WHITE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.2 or higher.
`imagick::VIRTUALPIXELMETHOD_HORIZONTALTILE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.3 or higher.
`imagick::VIRTUALPIXELMETHOD_VERTICALTILE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.3 or higher.

PREVIEW constants

`imagick::PREVIEW_UNDEFINED` (integer)
`imagick::PREVIEW_ROTATE` (integer)
`imagick::PREVIEW_SHEAR` (integer)
`imagick::PREVIEW_ROLL` (integer)
`imagick::PREVIEW_HUE` (integer)
`imagick::PREVIEW_SATURATION` (integer)
`imagick::PREVIEW_BRIGHTNESS` (integer)
`imagick::PREVIEW_GAMMA` (integer)
`imagick::PREVIEW_SPIFF` (integer)
`imagick::PREVIEW_DULL` (integer)
`imagick::PREVIEW_GRAYSCALE` (integer)
`imagick::PREVIEW_QUANTIZE` (integer)
`imagick::PREVIEW_DESPECKLE` (integer)
`imagick::PREVIEW_REDUCENOISE` (integer)
`imagick::PREVIEW_ADDNOISE` (integer)
`imagick::PREVIEW_SHARPEN` (integer)
`imagick::PREVIEW_BLUR` (integer)
`imagick::PREVIEW_THRESHOLD` (integer)
`imagick::PREVIEW_EDGEDETECT` (integer)
`imagick::PREVIEW_SPREAD` (integer)
`imagick::PREVIEW_SOLARIZE` (integer)
`imagick::PREVIEW_SHADE` (integer)
`imagick::PREVIEW_RAISE` (integer)
`imagick::PREVIEW_SEGMENT` (integer)
`imagick::PREVIEW_SWIRL` (integer)
`imagick::PREVIEW_IMPLODE` (integer)
`imagick::PREVIEW_WAVE` (integer)
`imagick::PREVIEW_OILPAINT` (integer)
`imagick::PREVIEW_CHARCOALDRAWING` (integer)
`imagick::PREVIEW_JPEG` (integer)

RENDERINGINTENT constants

`imagick::RENDERINGINTENT_UNDEFINED` (integer)
`imagick::RENDERINGINTENT_SATURATION` (integer)
`imagick::RENDERINGINTENT_PERCEPTUAL` (integer)
`imagick::RENDERINGINTENT_ABSOLUTE` (integer)
`imagick::RENDERINGINTENT_RELATIVE` (integer)

INTERLACE constants

`imagick::INTERLACE_UNDEFINED` (integer)
`imagick::INTERLACE_NO` (integer)
`imagick::INTERLACE_LINE` (integer)
`imagick::INTERLACE_PLANE` (integer)
`imagick::INTERLACE_PARTITION` (integer)
`imagick::INTERLACE_GIF` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.4 or higher.
`imagick::INTERLACE_JPEG` (integer)
`imagick::INTERLACE_PNG` (integer)

FILLRULE constants

`imagick::FILLRULE_UNDEFINED` (integer)
`imagick::FILLRULE_EVENODD` (integer)
`imagick::FILLRULE_NONZERO` (integer)

PATHUNITS constants

`imagick::PATHUNITS_UNDEFINED` (integer)
`imagick::PATHUNITS_USERSPACE` (integer)
`imagick::PATHUNITS_USERSPACEONUSE` (integer)
`imagick::PATHUNITS_OBJECTBOUNDINGBOX` (integer)

LINECAP constants

`imagick::LINECAP_UNDEFINED` (integer)
`imagick::LINECAP_BUTT` (integer)
`imagick::LINECAP_ROUND` (integer)
`imagick::LINECAP_SQUARE` (integer)

LINEJOIN constants

`imagick::LINEJOIN_UNDEFINED` (integer)
`imagick::LINEJOIN_MITER` (integer)
`imagick::LINEJOIN_ROUND` (integer)
`imagick::LINEJOIN_BEVEL` (integer)

RESOURCETYPE constants

`imagick::RESOURCETYPE_UNDEFINED` (integer)
`imagick::RESOURCETYPE_AREA` (integer)
`imagick::RESOURCETYPE_DISK` (integer)
`imagick::RESOURCETYPE_FILE` (integer)
`imagick::RESOURCETYPE_MAP` (integer)
`imagick::RESOURCETYPE_MEMORY` (integer)

LAYERMETHOD constants

`imagick::LAYERMETHOD_UNDEFINED` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.2.9 or higher.
`imagick::LAYERMETHOD_COALESCE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.2.9 or higher.
`imagick::LAYERMETHOD_COMPAREANY` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.2.9 or higher.
`imagick::LAYERMETHOD_COMPARECLEAR` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.2.9 or higher.
`imagick::LAYERMETHOD_COMPAREOVERLAY` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.2.9 or higher.
`imagick::LAYERMETHOD_DISPOSE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.2.9 or higher.
`imagick::LAYERMETHOD_OPTIMIZE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.2.9 or higher.
`imagick::LAYERMETHOD_OPTIMIZEPLUS` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.2.9 or higher.
`imagick::LAYERMETHOD_OPTIMIZEIMAGE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.0 or higher.
`imagick::LAYERMETHOD_OPTIMIZETRANS` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.0 or higher.
`imagick::LAYERMETHOD_REMOVEDUPS` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.0 or higher.
`imagick::LAYERMETHOD_REMOVEZERO` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.0 or higher.
`imagick::LAYERMETHOD_COMPOSITE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.0 or higher.
`imagick::LAYERMETHOD_MERGE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.7 or higher.
`imagick::LAYERMETHOD_FLATTEN` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.7 or higher.
`imagick::LAYERMETHOD_MOSAIC` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.7 or higher.

ORIENTATION constants

`imagick::ORIENTATION_UNDEFINED` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.0 or higher.
`imagick::ORIENTATION_TOPLEFT` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.0 or higher.
`imagick::ORIENTATION_TOPRIGHT` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.0 or higher.
`imagick::ORIENTATION_BOTTOMRIGHT` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.0 or higher.
`imagick::ORIENTATION_BOTTOMLEFT` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.0 or higher.
`imagick::ORIENTATION_LEFTTOP` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.0 or higher.
`imagick::ORIENTATION_RIGHTTOP` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.0 or higher.
`imagick::ORIENTATION_RIGHTBOTTOM` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.0 or higher.
`imagick::ORIENTATION_LEFTBOTTOM` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.0 or higher.

DISTORTION constants

`imagick::DISTORTION_UNDEFINED` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.6 or higher.
`imagick::DISTORTION_AFFINE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.6 or higher.
`imagick::DISTORTION_AFFINEPROJECTION` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.6 or higher.
`imagick::DISTORTION_ARC` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.6 or higher.
`imagick::DISTORTION_BILINEAR` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.6 or higher.
`imagick::DISTORTION_PERSPECTIVE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.6 or higher.
`imagick::DISTORTION_PERSPECTIVEPROJECTION` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.6 or higher.
`imagick::DISTORTION_SCALEROTATETRANSLATE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.6 or higher.
`imagick::DISTORTION_POLYNOMIAL` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.6 or higher.
`imagick::DISTORTION_POLAR` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.6 or higher.
`imagick::DISTORTION_DEPOLAR` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.6 or higher.
`imagick::DISTORTION_BARREL` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.6 or higher.
`imagick::DISTORTION_BARRELINVERSE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.6 or higher.
`imagick::DISTORTION_SHEPARDS` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.6 or higher.
`imagick::DISTORTION_SENTINEL` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.6 or higher.

ALPHACHANNEL constants

`imagick::ALPHACHANNEL_ACTIVATE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.8 or higher.
`imagick::ALPHACHANNEL_DEACTIVATE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.8 or higher.
`imagick::ALPHACHANNEL_RESET` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.8 or higher.
`imagick::ALPHACHANNEL_SET` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.8 or higher.
`imagick::ALPHACHANNEL_UNDEFINED` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.6 or higher.
`imagick::ALPHACHANNEL_COPY` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.6 or higher.
`imagick::ALPHACHANNEL_EXTRACT` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.6 or higher.
`imagick::ALPHACHANNEL_OPAQUE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.6 or higher.
`imagick::ALPHACHANNEL_SHAPE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.6 or higher.
`imagick::ALPHACHANNEL_TRANSPARENT` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.6 or higher.

SPARSECOLORMETHOD constants

`imagick::SPARSECOLORMETHOD_UNDEFINED` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.6 or higher.
`imagick::SPARSECOLORMETHOD_BARYCENTRIC` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.6 or higher.
`imagick::SPARSECOLORMETHOD_BILINEAR` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.6 or higher.
`imagick::SPARSECOLORMETHOD_POLYNOMIAL` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.6 or higher.
`imagick::SPARSECOLORMETHOD_SPEPARDS` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.6 or higher.
`imagick::SPARSECOLORMETHOD_VORONOI` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.6 or higher.

FUNCTION constants

`imagick::FUNCTION_UNDEFINED` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.9 or higher.
`imagick::FUNCTION_POLYNOMIAL` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.9 or higher.
`imagick::FUNCTION_SINUSOID` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.9 or higher.

INTERPOLATE constants

`imagick::INTERPOLATE_UNDEFINED` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.2 or higher.
`imagick::INTERPOLATE_AVERAGE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.2 or higher.
`imagick::INTERPOLATE_BICUBIC` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.2 or higher.
`imagick::INTERPOLATE_BILINEAR` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.2 or higher.
`imagick::INTERPOLATE_FILTER` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.2 or higher.
`imagick::INTERPOLATE_INTEGER` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.2 or higher.
`imagick::INTERPOLATE_MESH` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.2 or higher.
`imagick::INTERPOLATE_NEARESTNEIGHBOR` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.2 or higher.
`imagick::INTERPOLATE_SPLINE` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.3.4 or higher.

DITHERMETHOD constants

`imagick::DITHERMETHOD_UNDEFINED` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.6 or higher.
`imagick::DITHERMETHOD_NO` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.6 or higher.
`imagick::DITHERMETHOD_RIEMERSMA` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.6 or higher.
`imagick::DITHERMETHOD_FLOYDSTEINBERG` (integer)
  This constant is available if Imagick has been compiled against ImageMagick version 6.4.6 or higher.