MagickExtentImage() extends the image as defined by the geometry, gravity, and wand background color. Set the (x,y) offset of the geometry to move the original wand relative to the extended wand.

magickFloodfillPaintImage Source

Arguments

:: Ptr MagickWand	wand
-> ChannelType	channel
-> Ptr PixelWand	fill
-> CDouble	fuzz
-> Ptr PixelWand	bordercolor
-> CSize	x offset
-> CSize	y offset
-> MagickBooleanType	invert
-> IO MagickBooleanType

MagickFloodfillPaintImage() changes the color value of any pixel that matches target and is an immediate neighbor. If the method FillToBorderMethod is specified, the color value is changed for any neighbor pixel that does not match the bordercolor member of image.

magickNegateImage Source

Arguments

:: Ptr MagickWand
-> MagickBooleanType	negate gray
-> IO MagickBooleanType

MagickNegateImage() negates the colors in the reference image. The Grayscale option means that only grayscale values within the image are negated. You can also reduce the influence of a particular channel with a gamma value of 0.

magickNegateImageChannel Source

Arguments

:: Ptr MagickWand
-> ChannelType
-> MagickBooleanType	negate gray
-> IO MagickBooleanType

magickGetImageClipMask :: Ptr MagickWand -> IO (Ptr MagickWand)Source

MagickGetImageClipMask() gets the image clip mask at the current image index.

magickSetImageClipMask :: Ptr MagickWand -> Ptr MagickWand -> IO MagickBooleanType Source

MagickSetImageClipMask() sets image clip mask.

magickCompositeImage Source

Arguments

:: Ptr MagickWand
-> Ptr MagickWand	source
-> CompositeOperator
-> CSize	column offset
-> CSize	row offset
-> IO MagickBooleanType

MagickCompositeImage() composite one image onto another at the specified offset.

magickCompositeImageChannel Source

Arguments

:: Ptr MagickWand
-> Ptr MagickWand	source
-> ChannelType
-> CompositeOperator
-> CSize	column offset
-> CSize	row offset
-> IO MagickBooleanType

magickTransparentPaintImage Source

Arguments

:: Ptr MagickWand
-> Ptr PixelWand	change this color to specified opacity value withing the image
-> Double	the level of transarency: 1.0 fully opaque 0.0 fully transparent
-> Double	By default target must match a particular pixel color exactly. However, in many cases two colors may differ by a small amount. The fuzz member of image defines how much tolerance is acceptable to consider two colors as the same. For example, set fuzz to 10 and the color red at intensities of 100 and 102 respectively are now interpreted as the same color for the purposes of the floodfill.
-> MagickBooleanType
-> IO MagickBooleanType

MagickTransparentPaintImage() changes any pixel that matches color with the color defined by fill.

magickBorderImage Source

Arguments

:: Ptr MagickWand	wand
-> Ptr PixelWand	bordercolor
-> CSize	width
-> CSize	height
-> IO MagickBooleanType

MagickBorderImage() surrounds the image with a border of the color defined by the bordercolor pixel wand.

magickShaveImage Source

Arguments

:: Ptr MagickWand	wand
-> CSize	columns
-> CSize	rows
-> IO MagickBooleanType

MagickShaveImage() shaves pixels from the image edges. It allocates the memory necessary for the new Image structure and returns a pointer to the new image.

magickSetImageAlphaChannel Source

Arguments

:: Ptr MagickWand	wand
-> AlphaChannelType	alpha_type
-> IO MagickBooleanType

MagickSetImageAlphaChannel() activates, deactivates, resets, or sets the alpha channel.

magickNewImage Source

Arguments

:: Ptr MagickWand
-> CSize	width
-> CSize	height
-> Ptr PixelWand	background color
-> IO MagickBooleanType

MagickNewImage() adds a blank image canvas of the specified size and background color to the wand.

magickDrawImage :: Ptr MagickWand -> Ptr DrawingWand -> IO MagickBooleanType Source

MagickDrawImage() renders the drawing wand on the current image.

magickFlopImage :: Ptr MagickWand -> IO MagickBooleanType Source

MagickFlopImage() creates a horizontal mirror image by reflecting the pixels around the central y-axis.

magickAddNoiseImage :: Ptr MagickWand -> NoiseType -> IO MagickBooleanType Source

MagickAddNoiseImage() adds random noise to the image. The type of noise: Uniform, Gaussian, Multiplicative, Impulse, Laplacian, or Poisson.

magickAddImage :: Ptr MagickWand -> Ptr MagickWand -> IO MagickBooleanType Source

MagickAddImage() adds a clone of the images from the second wand and inserts them into the first wand. Use MagickSetLastIterator(), to append new images into an existing wand, current image will be set to last image so later adds with also be appened to end of wand.

Use MagickSetFirstIterator() to prepend new images into wand, any more images added will also be prepended before other images in the wand. However the order of a list of new images will not change.

Otherwise the new images will be inserted just after the current image, and any later image will also be added after this current image but before the previously added images. Caution is advised when multiple image adds are inserted into the middle of the wand image list.

magickFlipImage :: Ptr MagickWand -> IO MagickBooleanType Source

MagickFlipImage() creates a vertical mirror image by reflecting the pixels around the central x-axis.

magickSetVirtualPixelMethod :: Ptr MagickWand -> VirtualPixelMethod -> IO VirtualPixelMethod Source

MagickSetImageVirtualPixelMethod() sets the image virtual pixel method. the image virtual pixel method : UndefinedVirtualPixelMethod, ConstantVirtualPixelMethod, EdgeVirtualPixelMethod, MirrorVirtualPixelMethod, or TileVirtualPixelMethod.

magickAppendImages :: Ptr MagickWand -> MagickBooleanType -> IO (Ptr MagickWand)Source

MagickAppendImages() append the images in a wand from the current image onwards, creating a new wand with the single image result. This is affected by the gravity and background settings of the first image. Typically you would call either MagickResetIterator() or MagickSetFirstImage() before calling this function to ensure that all the images in the wand's image list will be appended together.

magickReadImage :: Ptr MagickWand -> CString -> IO MagickBooleanType Source

MagickReadImage() reads an image or image sequence. The images are inserted at the current image pointer position. Use MagickSetFirstIterator(), MagickSetLastIterator, or MagickSetImageIndex() to specify the current image pointer position at the beginning of the image list, the end, or anywhere in-between respectively.

magickReadImageBlob :: Ptr MagickWand -> Ptr () -> CSize -> IO MagickBooleanType Source

MagickReadImageBlob() reads an image or image sequence from a blob.

magickWriteImage :: Ptr MagickWand -> CString -> IO MagickBooleanType Source

MagickWriteImage() writes an image to the specified filename. If the filename parameter is NULL, the image is written to the filename set by MagickReadImage() or MagickSetImageFilename().

magickBlurImage :: Ptr MagickWand -> CDouble -> CDouble -> IO MagickBooleanType Source

MagickBlurImage() blurs an image. We convolve the image with a gaussian operator of the given radius and standard deviation (sigma). For reasonable results, the radius should be larger than sigma. Use a radius of 0 and BlurImage() selects a suitable radius for you.

The format of the MagickBlurImage method is:

magickBlurImageChannel :: Ptr MagickWand -> ChannelType -> CDouble -> CDouble -> IO MagickBooleanType Source

magickNormalizeImage :: Ptr MagickWand -> IO MagickBooleanType Source

MagickNormalizeImage() enhances the contrast of a color image by adjusting the pixels color to span the entire range of colors available

You can also reduce the influence of a particular channel with a gamma value of 0.

magickNormalizeImageChannel :: Ptr MagickWand -> ChannelType -> IO MagickBooleanType Source

magickShadowImage Source

Arguments

:: Ptr MagickWand
-> CDouble	percentage transparency
-> CDouble	the standard deviation of the Gaussian, in pixels
-> CSize	the shadow x-offset
-> CSize	the shadow y-offset
-> IO MagickBooleanType

MagickShadowImage() simulates an image shadow.

magickTrimImage :: Ptr MagickWand -> CDouble -> IO MagickBooleanType Source

MagickTrimImage() remove edges that are the background color from the image.

magickResetImagePage :: Ptr MagickWand -> CString -> IO MagickBooleanType Source

MagickResetImagePage() resets the Wand page canvas and position.

magickDistortImage Source

Arguments

:: Ptr MagickWand
-> DistortImageMethod	the method of image distortion
-> CSize	the number of arguments given for this distortion method
-> Ptr CDouble	the arguments for this distortion method
-> MagickBooleanType	attempt to resize destination to fit distorted source
-> IO MagickBooleanType

MagickDistortImage() distorts an image using various distortion methods, by mapping color lookups of the source image to a new destination image usally of the same size as the source image, unless bestfit is set to true. If bestfit is enabled, and distortion allows it, the destination image is adjusted to ensure the whole source image will just fit within the final destination image, which will be sized and offset accordingly. Also in many cases the virtual offset of the source image will be taken into account in the mapping.

magickShadeImage Source

Arguments

:: Ptr MagickWand
-> MagickBooleanType	a value other than zero shades the intensity of each pixel
-> CDouble	azimuth of the light source direction
-> CDouble	evelation of the light source direction
-> IO MagickBooleanType

MagickShadeImage() shines a distant light on an image to create a three-dimensional effect. You control the positioning of the light with azimuth and elevation; azimuth is measured in degrees off the x axis and elevation is measured in pixels above the Z axis.

magickColorizeImage Source

Arguments

:: Ptr MagickWand
-> Ptr PixelWand	the colorize pixel wand
-> Ptr PixelWand	the opacity pixel wand
-> IO MagickBooleanType

MagickColorizeImage() blends the fill color with each pixel in the image.

magickFxImage Source

Arguments

:: Ptr MagickWand
-> CString	the expression
-> IO (Ptr MagickWand)

MagickFxImage() evaluate expression for each pixel in the image.

magickFxImageChannel Source

Arguments

:: Ptr MagickWand
-> ChannelType	the image channel(s)
-> CString	the expression
-> IO (Ptr MagickWand)

MagickFxImageChannel() evaluate expression for each pixel in the image.

magickSigmoidalContrastImage Source

Arguments

:: Ptr MagickWand
-> MagickBooleanType	increase or decrease image contrast
-> CDouble	strength of the contrast, the larger the number the more 'threshold-like' it becomes
-> CDouble	midpoint of the function as a color value 0 to `quantumRange`
-> IO MagickBooleanType

MagickSigmoidalContrastImage() adjusts the contrast of an image with a non-linear sigmoidal contrast algorithm. Increase the contrast of the image using a sigmoidal transfer function without saturating highlights or shadows. Contrast indicates how much to increase the contrast (0 is none; 3 is typical; 20 is pushing it); mid-point indicates where midtones fall in the resultant image (0 is white; 50 is middle-gray; 100 is black). Set sharpen to True to increase the image contrast otherwise the contrast is reduced.

magickSigmoidalContrastImageChannel Source

Arguments

:: Ptr MagickWand
-> ChannelType	identify which channel to level: `redChannel`, `greenChannel`
-> MagickBooleanType	increase or decrease image contrast
-> CDouble	strength of the contrast, the larger the number the more 'threshold-like' it becomes
-> CDouble	midpoint of the function as a color value 0 to `quantumRange`
-> IO MagickBooleanType

see magickSigmoidalContrastImage

magickEvaluateImage Source

Arguments

:: Ptr MagickWand
-> MagickEvaluateOperator	a channel operator
-> CDouble	value
-> IO MagickBooleanType

MagickEvaluateImage() applies an arithmetic, relational, or logical expression to an image. Use these operators to lighten or darken an image, to increase or decrease contrast in an image, or to produce the negative of an image.

magickEvaluateImages Source

Arguments

:: Ptr MagickWand
-> MagickEvaluateOperator	a channel operator
-> IO MagickBooleanType

see magickEvaluateImage

magickEvaluateImageChannel Source

Arguments

:: Ptr MagickWand
-> ChannelType	the channel(s)
-> MagickEvaluateOperator	a channel operator
-> CDouble	value
-> IO MagickBooleanType

see magickEvaluateImage

magickRollImage Source

Arguments

:: Ptr MagickWand
-> CDouble	the x offset
-> CDouble	the y offset
-> IO MagickBooleanType

MagickRollImage() offsets an image as defined by x and y.

magickAnnotateImage Source

Arguments

:: Ptr MagickWand
-> Ptr DrawingWand	the draw wand
-> CDouble	x ordinate to left of text
-> CDouble	y ordinate to text baseline
-> CDouble	rotate text relative to this angle
-> CString	text to draw
-> IO MagickBooleanType

MagickAnnotateImage() annotates an image with text.

magickMergeImageLayers Source

Arguments

:: Ptr MagickWand
-> ImageLayerMethod	the method of selecting the size of the initial canvas
-> IO (Ptr MagickWand)

MagickMergeImageLayers() composes all the image layers from the current given image onward to produce a single image of the merged layers. The inital canvas's size depends on the given ImageLayerMethod, and is initialized using the first images background color. The images are then compositied onto that image in sequence using the given composition that has been assigned to each individual image.

magickTintImage Source

Arguments

:: Ptr MagickWand
-> Ptr PixelWand	the tint pixel wand.
-> Ptr PixelWand	opacity pixel wand
-> IO MagickBooleanType

MagickTintImage() applies a color vector to each pixel in the image. The length of the vector is 0 for black and white and at its maximum for the midtones. The vector weighting function is f(x)=(1-(4.0*((x-0.5)*(x-0.5)))).

magickSetImageMatte :: Ptr MagickWand -> MagickBooleanType -> IO MagickBooleanType Source

MagickSetImageMatte() sets the image matte channel.

magickCropImage Source

Arguments

:: Ptr MagickWand
-> CSize	the region width
-> CSize	the region height
-> CSize	the region x-offset
-> CSize	the region y-offset
-> IO MagickBooleanType

MagickCropImage() extracts a region of the image.

magickShearImage Source

Arguments

:: Ptr MagickWand
-> Ptr PixelWand	the background pixel wand
-> CDouble	the number of degrees to shear the image
-> CDouble	the number of degrees to shear the image
-> IO MagickBooleanType

MagickShearImage() slides one edge of an image along the X or Y axis, creating a parallelogram. An X direction shear slides an edge along the X axis, while a Y direction shear slides an edge along the Y axis. The amount of the shear is controlled by a shear angle. For X direction shears, x_shear is measured relative to the Y axis, and similarly, for Y direction shears y_shear is measured relative to the X axis. Empty triangles left over from shearing the image are filled with the background color.

magickScaleImage Source

Arguments

:: Ptr MagickWand
-> CSize	the number of columns in the scaled image
-> CSize	the number of rows in the scaled image
-> IO MagickBooleanType

MagickScaleImage() scales the size of an image to the given dimensions.

magickSparseColorImage :: Ptr MagickWand -> ChannelType -> SparseColorMethod -> CSize -> Ptr Double -> IO MagickBooleanType Source

MagickSparseColorImage(), given a set of coordinates, interpolates the colors found at those coordinates, across the whole image, using various methods.

The format of the MagickSparseColorImage method is: ArcSparseColorion will always ignore source image offset, and always bestfit the destination image with the top left corner offset relative to the polar mapping center.

Bilinear has no simple inverse mapping so will not allow bestfit style of image sparseion.

Affine, Perspective, and Bilinear, will do least squares fitting of the distrotion when more than the minimum number of control point pairs are provided.

Perspective, and Bilinear, will fall back to a Affine sparseion when less than 4 control point pairs are provided. While Affine sparseions will let you use any number of control point pairs, that is Zero pairs is a No-Op (viewport only) distrotion, one pair is a translation and two pairs of control points will do a scale-rotate-translate, without any shearing.

magickFunctionImage :: Ptr MagickWand -> MagickFunction -> CSize -> Ptr Double -> IO MagickBooleanType Source

MagickFunctionImage() applys an arithmetic, relational, or logical expression to an image. Use these operators to lighten or darken an image, to increase or decrease contrast in an image, or to produce the negative of an image.

magickFunctionImageChannel :: Ptr MagickWand -> ChannelType -> MagickFunction -> CSize -> Ptr Double -> IO MagickBooleanType Source

magickCoalesceImages :: Ptr MagickWand -> IO (Ptr MagickWand)Source

MagickCoalesceImages() composites a set of images while respecting any page offsets and disposal methods. GIF, MIFF, and MNG animation sequences typically start with an image background and each subsequent image varies in size and offset. MagickCoalesceImages() returns a new sequence where each image in the sequence is the same size as the first and composited with the next image in the sequence.

magickGetNumberImages :: Ptr MagickWand -> IO CSize Source

MagickGetNumberImages() returns the number of images associated with a magick wand.

magickGetImage :: Ptr MagickWand -> IO (Ptr MagickWand)Source

MagickGetImage() gets the image at the current image index.

magickCompareImageLayers :: Ptr MagickWand -> ImageLayerMethod -> IO (Ptr MagickWand)Source

MagickCompareImageLayers() compares each image with the next in a sequence and returns the maximum bounding region of any pixel differences it discovers.

magickGetImageScene :: Ptr MagickWand -> IO CSize Source

MagickGetImageScene() gets the image scene

magickRemoveImage :: Ptr MagickWand -> IO MagickBooleanType Source

MagickRemoveImage() removes an image from the image list.

magickSetImage :: Ptr MagickWand -> Ptr MagickWand -> IO MagickBooleanType Source

MagickSetImage() replaces the last image returned by MagickSetImageIndex(), MagickNextImage(), MagickPreviousImage() with the images from the specified wand.

magickImportImagePixels Source

Arguments

:: Ptr MagickWand
-> CSize	x
-> CSize	y
-> CSize	width
-> CSize	height
-> CString	this string reflects the expected ordering of the pixel array. It can be any combination or order of R = red, G = green, B = blue, A = alpha (0 is transparent), O = opacity (0 is opaque), C = cyan, Y = yellow, M = magenta, K = black, I = intensity (for grayscale), P = pad.
-> StorageType
-> Ptr ()	This array of values contain the pixel components as defined by map and type. You must preallocate this array where the expected length varies depending on the values of width, height, map, and type
-> IO MagickBooleanType

MagickImportImagePixels() accepts pixel data and stores it in the image at the location you specify. The method returns MagickFalse on success otherwise MagickTrue if an error is encountered. The pixel data can be either char, short int, int, ssize_t, float, or double in the order specified by map.

Suppose your want to upload the first scanline of a 640x480 image from character data in red-green-blue order: magickImportImagePixels wand 0 0 640 1 RGB charPixel pixels

magickExportImagePixels Source

Arguments

:: Ptr MagickWand
-> CSize	x
-> CSize	y
-> CSize	width
-> CSize	height
-> CString	this string reflects the expected ordering of the pixel array. It can be any combination or order of R = red, G = green, B = blue, A = alpha (0 is transparent), O = opacity (0 is opaque), C = cyan, Y = yellow, M = magenta, K = black, I = intensity (for grayscale), P = pad.
-> StorageType
-> Ptr ()	This array of values contain the pixel components as defined by map and type. You must preallocate this array where the expected length varies depending on the values of width, height, map, and type
-> IO MagickBooleanType

MagickExportImagePixels() extracts pixel data from an image and returns it to you. The method returns MagickTrue on success otherwise MagickFalse if an error is encountered. The data is returned as char, short int, int, ssize_t, float, or double in the order specified by map.

magickRotateImage :: Ptr MagickWand -> Ptr PixelWand -> CDouble -> IO MagickBooleanType Source

MagickRotateImage() rotates an image the specified number of degrees. Empty triangles left over from rotating the image are filled with the background color.

magickSetImageDepth :: Ptr MagickWand -> CSize -> IO MagickBooleanType Source

MagickSetImageDepth() sets the image depth.

magickSetImageDelay :: Ptr MagickWand -> CSize -> IO MagickBooleanType Source

MagickSetImageDelay() sets the image delay.

magickGetImageDelay :: Ptr MagickWand -> IO CSize Source

MagickGetImageDelay() gets the image delay.

magickGetImageBlob :: Ptr MagickWand -> Ptr CSize -> IO (Ptr CChar)Source

MagickGetImageBlob() implements direct to memory image formats. It returns the image as a blob (a formatted file in memory) and its length, starting from the current position in the image sequence. Use MagickSetImageFormat() to set the format to write to the blob (GIF, JPEG, PNG, etc.). Utilize MagickResetIterator() to ensure the write is from the beginning of the image sequence. Use MagickRelinquishMemory() to free the blob when you are done with it. The format of the MagickGetImageBlob method is:

magickGetImageDepth :: Ptr MagickWand -> IO CSize Source

MagickGetImageDepth() gets the image depth.

magickGetImageFormat :: Ptr MagickWand -> IO CString Source

MagickGetImageFormat() returns the format of a particular image in a sequence.

magickSetImageFormat :: Ptr MagickWand -> CString -> IO MagickBooleanType Source

MagickSetImageFormat() sets the format of a particular image in a sequence.

magickStripImage :: Ptr MagickWand -> IO MagickBooleanType Source

MagickStripImage() strips an image of all profiles and comments.

magickGetImageSignature :: Ptr MagickWand -> IO CString Source

MagickGetImageSignature() generates an SHA-256 message digest for the image pixel stream.

magickGetImageAlphaChannel :: Ptr MagickWand -> IO MagickBooleanType Source

MagickGetImageAlphaChannel() returns MagickFalse if the image alpha channel is not activated. That is, the image is RGB rather than RGBA or CMYK rather than CMYKA.

magickSetImageType :: Ptr MagickWand -> ImageType -> IO MagickBooleanType Source

MagickSetImageType() sets the image type.