gmagick

func (*AffineMatrix) RotateX ¶

func (a *AffineMatrix) RotateX() float64

RotateX returns the RX value

func (*AffineMatrix) RotateY ¶

func (a *AffineMatrix) RotateY() float64

RotateY returns the RY value

func (*AffineMatrix) ScaleX ¶

func (a *AffineMatrix) ScaleX() float64

ScaleX returns the SX value

func (*AffineMatrix) ScaleY ¶

func (a *AffineMatrix) ScaleY() float64

ScaleY returns the SY value

func (*AffineMatrix) SetRotateX ¶

func (a *AffineMatrix) SetRotateX(val float64)

SetRotateX sets the RX value

func (*AffineMatrix) SetRotateY ¶

func (a *AffineMatrix) SetRotateY(val float64)

SetRotateY sets the RY value

func (*AffineMatrix) SetScaleX ¶

func (a *AffineMatrix) SetScaleX(val float64)

SetScaleX sets the SX value

func (*AffineMatrix) SetScaleY ¶

func (a *AffineMatrix) SetScaleY(val float64)

SetScaleY sets the SY value

func (*AffineMatrix) SetTranslateX ¶

func (a *AffineMatrix) SetTranslateX(val float64)

SetTranslateX sets the TX value

func (*AffineMatrix) SetTranslateY ¶

func (a *AffineMatrix) SetTranslateY(val float64)

SetTranslateY sets the TY value

func (*AffineMatrix) TranslateX ¶

func (a *AffineMatrix) TranslateX() float64

TranslateX returns the TX value

func (*AffineMatrix) TranslateY ¶

func (a *AffineMatrix) TranslateY() float64

TranslateY returns the TY value

func (*DrawingWand) Affine ¶

func (dw *DrawingWand) Affine(affine *AffineMatrix)

Adjusts the current affine transformation matrix with the specified affine transformation matrix. Note that the current affine transform is adjusted rather than replaced.

affine: Affine matrix parameters

func (*DrawingWand) Annotation ¶

func (dw *DrawingWand) Annotation(x, y float64, text string)

Draws text on the image. x: x ordinate to left of text y: y ordinate to text baseline text: text to draw

func (*DrawingWand) Arc ¶

func (dw *DrawingWand) Arc(sx, sy, ex, ey, sd, ed float64)

Draws an arc falling within a specified bounding rectangle on the image.

sx: starting x ordinate of bounding rectangle

sy: starting y ordinate of bounding rectangle

ex: ending x ordinate of bounding rectangle

ey: ending y ordinate of bounding rectangle

sd: starting degrees of rotation

ed: ending degrees of rotation

func (*DrawingWand) Bezier ¶

func (dw *DrawingWand) Bezier(coordinates []PointInfo)

Draws a bezier curve through a set of points on the image.

func (*DrawingWand) Circle ¶

func (dw *DrawingWand) Circle(ox, oy, px, py float64)

Draws a circle on the image.

ox: origin x ordinate

oy: origin y ordinate

px: perimeter x ordinate

py: perimeter y ordinate

func (*DrawingWand) Clone ¶

func (dw *DrawingWand) Clone() *DrawingWand

Makes an exact copy of the specified wand.

func (*DrawingWand) Color ¶

func (dw *DrawingWand) Color(x, y float64, pm PaintMethod)

Draws color on image using the current fill color, starting at specified position, and using specified paint method. The available paint methods are:

x: x ordinate.

y: y ordinate.

pm: paint method. PointMethod: Recolors the target pixel. ReplaceMethod: Recolor any pixel that matches the target pixel. FloodfillMethod: Recolors target pixels and matching neighbors. ResetMethod: Recolor all pixels.

func (*DrawingWand) Comment ¶

func (dw *DrawingWand) Comment(comment string)

Adds a comment to a vector output stream.

func (*DrawingWand) Composite ¶

func (dw *DrawingWand) Composite(compose CompositeOperator, x, y, width, height float64, mw *MagickWand)

Composites an image onto the current image, using the specified composition operator, specified position, and at the specified size.

compose: composition operator

x: x ordinate of top left corner

y: y ordinate of top left corner

width: Width to resize image to prior to compositing. Specify zero to use existing width.

height: Height to resize image to prior to compositing. Specify zero to use existing height.

mw: Image to composite is obtained from this wand.

func (*DrawingWand) DecreaseCount ¶

func (dw *DrawingWand) DecreaseCount()

Decrease DrawingWand ref counter and set according "can be terminated status"

func (*DrawingWand) Destroy ¶

func (dw *DrawingWand) Destroy()

Frees all resources associated with the drawing wand. Once the drawing wand has been freed, it should not be used and further unless it re-allocated.

func (*DrawingWand) Ellipse ¶

func (dw *DrawingWand) Ellipse(ox, oy, rx, ry, start, end float64)

Draws an ellipse on the image.

ox: origin x ordinate

oy: origin y ordinate

rx: radius in x

ry: radius in y

start: starting rotation in degrees

end: ending rotation in degrees

func (*DrawingWand) GetClipPath ¶

func (dw *DrawingWand) GetClipPath() string

Obtains the current clipping path ID.

func (*DrawingWand) GetClipRule ¶

func (dw *DrawingWand) GetClipRule() FillRule

Returns the current polygon fill rule to be used by the clipping path.

func (*DrawingWand) GetClipUnits ¶

func (dw *DrawingWand) GetClipUnits() ClipPathUnits

Returns the interpretation of clip path units.

func (*DrawingWand) GetFillColor ¶

func (dw *DrawingWand) GetFillColor() (pw *PixelWand)

Returns the fill color used for drawing filled objects.

func (*DrawingWand) GetFillOpacity ¶

func (dw *DrawingWand) GetFillOpacity() float64

Returns the opacity used when drawing using the fill color or fill texture. Fully opaque is 1.0.

func (*DrawingWand) GetFillRule ¶

func (dw *DrawingWand) GetFillRule() FillRule

Returns the fill rule used while drawing polygons.

func (*DrawingWand) GetFont ¶

func (dw *DrawingWand) GetFont() string

Returns a string specifying the font used when annotating with text.

func (*DrawingWand) GetFontFamily ¶

func (dw *DrawingWand) GetFontFamily() string

Returns the font family to use when annotating with text.

func (*DrawingWand) GetFontSize ¶

func (dw *DrawingWand) GetFontSize() float64

func (*DrawingWand) GetFontStretch ¶

func (dw *DrawingWand) GetFontStretch() StretchType

Returns the font stretch used when annotating with text.

func (*DrawingWand) GetFontStyle ¶

func (dw *DrawingWand) GetFontStyle() StyleType

Returns the font style used when annotating with text.

func (*DrawingWand) GetFontWeight ¶

func (dw *DrawingWand) GetFontWeight() uint

Returns the font weight used when annotating with text.

func (*DrawingWand) GetGravity ¶

func (dw *DrawingWand) GetGravity() GravityType

Returns the text placement gravity used when annotating with text.

func (*DrawingWand) GetLastError ¶

func (dw *DrawingWand) GetLastError() error

Returns the kind, reason and description of any error that occurs when using other methods in this API

func (*DrawingWand) GetStrokeAntialias ¶

func (dw *DrawingWand) GetStrokeAntialias() bool

Returns the current stroke antialias setting. Stroked outlines are antialiased by default. When antialiasing is disabled stroked pixels are thresholded to determine if the stroke color or underlying canvas color should be used.

func (*DrawingWand) GetStrokeColor ¶

func (dw *DrawingWand) GetStrokeColor() (pw *PixelWand)

Returns the color used for stroking object outlines.

func (*DrawingWand) GetStrokeDashArray ¶

func (dw *DrawingWand) GetStrokeDashArray() (nums []float64)

Returns an array representing the pattern of dashes and gaps used to stroke paths (see SetStrokeDashArray). The array must be freed once it is no longer required by the user.

func (*DrawingWand) GetStrokeDashOffset ¶

func (dw *DrawingWand) GetStrokeDashOffset() float64

Returns the offset into the dash pattern to start the dash.

func (*DrawingWand) GetStrokeLineCap ¶

func (dw *DrawingWand) GetStrokeLineCap() LineCap

Returns the shape to be used at the end of open subpaths when they are stroked. Values of LineCap are UndefinedCap, ButtCap, RoundCap, and SquareCap.

func (*DrawingWand) GetStrokeLineJoin ¶

func (dw *DrawingWand) GetStrokeLineJoin() LineJoin

Returns the shape to be used at the corners of paths (or other vector shapes) when they are stroked. Values of LineJoin are UndefinedJoin, MiterJoin, RoundJoin, and BevelJoin.

func (*DrawingWand) GetStrokeMiterLimit ¶

func (dw *DrawingWand) GetStrokeMiterLimit() uint

Returns the miter limit. When two line segments meet at a sharp angle and miter joins have been specified for 'lineJoin', it is possible for the miter to extend far beyond the thickness of the line stroking the path. The miterLimit' imposes a limit on the ratio of the miter length to the 'lineWidth'.

func (*DrawingWand) GetStrokeOpacity ¶

func (dw *DrawingWand) GetStrokeOpacity() float64

Returns the opacity of stroked object outlines.

func (*DrawingWand) GetStrokeWidth ¶

func (dw *DrawingWand) GetStrokeWidth() float64

Returns the width of the stroke used to draw object outlines.

func (*DrawingWand) GetTextAntialias ¶

func (dw *DrawingWand) GetTextAntialias() bool

Returns the current text antialias setting, which determines whether text is antialiased. Text is antialiased by default.

func (*DrawingWand) GetTextDecoration ¶

func (dw *DrawingWand) GetTextDecoration() DecorationType

Returns the decoration applied when annotating with text.

func (*DrawingWand) GetTextEncoding ¶

func (dw *DrawingWand) GetTextEncoding() string

Returns a string which specifies the code set used for text annotations.

func (*DrawingWand) GetTextUnderColor ¶

func (dw *DrawingWand) GetTextUnderColor() (pw *PixelWand)

Returns the color of a background rectangle to place under text annotations.

func (*DrawingWand) IncreaseCount ¶

func (dw *DrawingWand) IncreaseCount()

Increase DrawingWand ref counter and set according "can`t be terminated status"

func (*DrawingWand) Line ¶

func (dw *DrawingWand) Line(sx, sy, ex, ey float64)

Draws a line on the image using the current stroke color, stroke opacity, and stroke width.

sx: starting x ordinate

sy: starting y ordinate

ex: ending x ordinate

ey: ending y ordinate

func (*DrawingWand) Matte ¶

func (dw *DrawingWand) Matte(x, y float64, pmethod PaintMethod)

Paints on the image's opacity channel in order to set effected pixels to transparent. to influence the opacity of pixels. The available paint methods are:

	ResetMethod: Select all pixels.

	PointMethod: Select the target pixel

	ReplaceMethod: Select any pixel that matches the target pixel.

	FloodfillMethod: Select the target pixel and matching neighbors.

	FillToBorderMethod: Select the target pixel and neighbors not matching
                     border color.

x, y: x, y ordinates pmethod: paint method

func (*DrawingWand) PathClose ¶

func (dw *DrawingWand) PathClose()

Adds a path element to the current path which closes the current subpath by drawing a straight line from the current point to the current subpath's most recent starting point (usually, the most recent moveto point).

func (*DrawingWand) PathCurveToAbsolute ¶

func (dw *DrawingWand) PathCurveToAbsolute(x1, y1, x2, y2, x, y float64)

Draws a cubic Bezier curve from the current point to (x,y) using (x1,y1) as the control point at the beginning of the curve and (x2,y2) as the control point at the end of the curve using absolute coordinates. At the end of the command, the new current point becomes the final (x,y) coordinate pair used in the polybezier.

x1, y1: x, y ordinates of control point for curve beginning

x2, y2: x, y ordinates of control point for curve ending

x, y: x, y ordinates of the end of the curve

func (*DrawingWand) PathCurveToQuadraticBezierAbsolute ¶

func (dw *DrawingWand) PathCurveToQuadraticBezierAbsolute(x1, y1, x, y float64)

Draws a quadratic Bezier curve from the current point to (x,y) using (x1,y1) as the control point using absolute coordinates. At the end of the command, the new current point becomes the final (x,y) coordinate pair used in the polybezier.

x1, y1: ordinates of the control point

x, y: ordinates of final point

func (*DrawingWand) PathCurveToQuadraticBezierRelative ¶

func (dw *DrawingWand) PathCurveToQuadraticBezierRelative(x1, y1, x, y float64)

Draws a quadratic Bezier curve from the current point to (x,y) using (x1,y1) as the control point using relative coordinates. At the end of the command, the new current point becomes the final (x,y) coordinate pair used in the polybezier. x1, y1: ordinates of the control point x, y: ordinates of final point

func (*DrawingWand) PathCurveToQuadraticBezierSmoothAbsolute ¶

func (dw *DrawingWand) PathCurveToQuadraticBezierSmoothAbsolute(x, y float64)

Draws a quadratic Bezier curve (using absolute coordinates) from the current point to (x,y). The control point is assumed to be the reflection of the control point on the previous command relative to the current point. (If there is no previous command or if the previous command was not a PathCurveToQuadraticBezierAbsolute, PathCurveToQuadraticBezierRelative, PathCurveToQuadraticBezierSmoothAbsolute or PathCurveToQuadraticBezierSmoothRelative, assume the control point is coincident with the current point.). At the end of the command, the new current point becomes the final (x,y) coordinate pair used in the polybezier.

x, y: ordinates of final point

func (*DrawingWand) PathCurveToQuadraticBezierSmoothRelative ¶

func (dw *DrawingWand) PathCurveToQuadraticBezierSmoothRelative(x, y float64)

Draws a quadratic Bezier curve (using relative coordinates) from the current point to (x,y). The control point is assumed to be the reflection of the control point on the previous command relative to the current point. (If there is no previous command or if the previous command was not a PathCurveToQuadraticBezierAbsolute, PathCurveToQuadraticBezierRelative, PathCurveToQuadraticBezierSmoothAbsolute or PathCurveToQuadraticBezierSmoothRelative, assume the control point is coincident with the current point.). At the end of the command, the new current point becomes the final (x,y) coordinate pair used in the polybezier.

x, y: ordinates of final point

func (*DrawingWand) PathCurveToRelative ¶

func (dw *DrawingWand) PathCurveToRelative(x1, y1, x2, y2, x, y float64)

Draws a cubic Bezier curve from the current point to (x,y) using (x1,y1) as the control point at the beginning of the curve and (x2,y2) as the control point at the end of the curve using relative coordinates. At the end of the command, the new current point becomes the final (x,y) coordinate pair used in the polybezier.

x1, y1: x, y ordinates of control point for curve beginning

x2, y2: x, y ordinates of control point for curve ending

x, y: x, y ordinates of the end of the curve

func (*DrawingWand) PathCurveToSmoothAbsolute ¶

func (dw *DrawingWand) PathCurveToSmoothAbsolute(x2, y2, x, y float64)

Draws a cubic Bezier curve from the current point to (x,y) using absolute coordinates. The first control point is assumed to be the reflection of the second control point on the previous command relative to the current point. (If there is no previous command or if the previous command was not an PathCurveToAbsolute, PathCurveToRelative, PathCurveToSmoothAbsolute or PathCurveToSmoothRelative, assume the first control point is coincident with the current point.) (x2,y2) is the second control point (i.e., the control point at the end of the curve). At the end of the command, the new current point becomes the final (x,y) coordinate pair used in the polybezier.

x2, y2: ordinates of second control point

x, y: ordinates of termination point

func (*DrawingWand) PathCurveToSmoothRelative ¶

func (dw *DrawingWand) PathCurveToSmoothRelative(x2, y2, x, y float64)

Draws a cubic Bezier curve from the current point to (x,y) using relative coordinates. The first control point is assumed to be the reflection of the second control point on the previous command relative to the current point. (If there is no previous command or if the previous command was not an PathCurveToAbsolute, PathCurveToRelative, PathCurveToSmoothAbsolute or PathCurveToSmoothRelative, assume the first control point is coincident with the current point.) (x2,y2) is the second control point (i.e., the control point at the end of the curve). At the end of the command, the new current point becomes the final (x,y) coordinate pair used in the polybezier.

x2, y2: ordinates of second control point

x, y: ordinates of termination point

func (*DrawingWand) PathEllipticArcAbsolute ¶

func (dw *DrawingWand) PathEllipticArcAbsolute(rx, ry, xAxisRotation float64, largeArcFlag, sweepFlag bool, x, y float64)

Draws an elliptical arc from the current point to (x, y) using absolute coordinates. The size and orientation of the ellipse are defined by two radii (rx, ry) and an xAxisRotation, which indicates how the ellipse as a whole is rotated relative to the current coordinate system. The center (cx, cy) of the ellipse is calculated automagically to satisfy the constraints imposed by the other parameters. largeArcFlag and sweepFlag contribute to the automatic calculations and help determine how the arc is drawn. If largeArcFlag is true then draw the larger of the available arcs. If sweepFlag is true, then draw the arc matching a clock-wise rotation.

rx, ry: x, y radius

xAxisRotation: indicates how the ellipse as a whole is rotated relative to the current coordinate system

largeArcFlag: If true then draw the larger of the available arcs

sweepFlag: If true then draw the arc matching a clock-wise rotation

func (*DrawingWand) PathEllipticArcRelative ¶

func (dw *DrawingWand) PathEllipticArcRelative(rx, ry, xAxisRotation float64, largeArcFlag, sweepFlag bool, x, y float64)

Draws an elliptical arc from the current point to (x, y) using relative coordinates. The size and orientation of the ellipse are defined by two radii (rx, ry) and an xAxisRotation, which indicates how the ellipse as a whole is rotated relative to the current coordinate system. The center (cx, cy) of the ellipse is calculated automagically to satisfy the constraints imposed by the other parameters. largeArcFlag and sweepFlag contribute to the automatic calculations and help determine how the arc is drawn. If largeArcFlag is true then draw the larger of the available arcs. If sweepFlag is true, then draw the arc matching a clock-wise rotation.

rx, ry: x, y radius

xAxisRotation: indicates how the ellipse as a whole is rotated relative to the current coordinate system

largeArcFlag: If true then draw the larger of the available arcs

sweepFlag: If true then draw the arc matching a clock-wise rotation

func (*DrawingWand) PathFinish ¶

func (dw *DrawingWand) PathFinish()

Terminates the current path.

func (*DrawingWand) PathLineToAbsolute ¶

func (dw *DrawingWand) PathLineToAbsolute(x, y float64)

Draws a line path from the current point to the given coordinate using absolute coordinates. The coordinate then becomes the new current point.

x, y: target x and y ordinates

func (*DrawingWand) PathLineToHorizontalAbsolute ¶

func (dw *DrawingWand) PathLineToHorizontalAbsolute(x float64)

Draws a horizontal line path from the current point to the target point using absolute coordinates. The target point then becomes the new current point.

x: target x ordinate

func (*DrawingWand) PathLineToHorizontalRelative ¶

func (dw *DrawingWand) PathLineToHorizontalRelative(x float64)

Draws a horizontal line path from the current point to the target point using relative coordinates. The target point then becomes the new current point.

x: target x ordinate

func (*DrawingWand) PathLineToRelative ¶

func (dw *DrawingWand) PathLineToRelative(x, y float64)

Draws a line path from the current point to the given coordinate using relative coordinates. The coordinate then becomes the new current point.

x, y: target x and y ordinates

func (*DrawingWand) PathLineToVerticalAbsolute ¶

func (dw *DrawingWand) PathLineToVerticalAbsolute(y float64)

Draws a vertical line path from the current point to the target point using absolute coordinates. The target point then becomes the new current point.

y: target y ordinate

func (*DrawingWand) PathLineToVerticalRelative ¶

func (dw *DrawingWand) PathLineToVerticalRelative(y float64)

Draws a vertical line path from the current point to the target point using relative coordinates. The target point then becomes the new current point.

y: target y ordinate

func (*DrawingWand) PathMoveToAbsolute ¶

func (dw *DrawingWand) PathMoveToAbsolute(x, y float64)

Starts a new sub-path at the given coordinate using absolute coordinates. The current point then becomes the specified coordinate.

x, y: target x and y ordinates

func (*DrawingWand) PathMoveToRelative ¶

func (dw *DrawingWand) PathMoveToRelative(x, y float64)

Starts a new sub-path at the given coordinate using relative coordinates. The current point then becomes the specified coordinate.

x, y: target x and y ordinates

func (*DrawingWand) PathStart ¶

func (dw *DrawingWand) PathStart()

Declares the start of a path drawing list which is terminated by a matching PathFinish() command. All other Path commands must be enclosed between a PathStart() and a PathFinish() command. This is because path drawing commands are subordinate commands and they do not function by themselves.

func (*DrawingWand) Point ¶

func (dw *DrawingWand) Point(x, y float64)

Draws a point using the current fill color.

x, y: target x, y coordinates

func (*DrawingWand) Polygon ¶

func (dw *DrawingWand) Polygon(coordinates []PointInfo)

Draws a polygon using the current stroke, stroke width, and fill color or texture, using the specified array of coordinates.

func (*DrawingWand) Polyline ¶

func (dw *DrawingWand) Polyline(coordinates []PointInfo)

Draws a polyline using the current stroke, stroke width, and fill color or texture, using the specified array of coordinates.

func (*DrawingWand) PopClipPath ¶

func (dw *DrawingWand) PopClipPath()

Terminates a clip path definition.

func (*DrawingWand) PopDefs ¶

func (dw *DrawingWand) PopDefs()

Terminates a definition list.

func (*DrawingWand) PopPattern ¶

func (dw *DrawingWand) PopPattern()

Terminates a pattern definition.

func (*DrawingWand) PushClipPath ¶

func (dw *DrawingWand) PushClipPath(clipMaskId string)

Starts a clip path definition which is comprized of any number of drawing commands and terminated by a DrawPopClipPath() command.

clipMaskId: string identifier to associate with the clip path for later use.

func (*DrawingWand) PushDefs ¶

func (dw *DrawingWand) PushDefs()

Indicates that commands up to a terminating PopDefs() command create named elements (e.g. clip-paths, textures, etc.) which may safely be processed earlier for the sake of efficiency.

func (*DrawingWand) PushPattern ¶

func (dw *DrawingWand) PushPattern(patternId string, x, y, width, height float64)

Indicates that subsequent commands up to a PopPattern() command comprise the definition of a named pattern. The pattern space is assigned top left corner coordinates, a width and height, and becomes its own drawing space. Anything which can be drawn may be used in a pattern definition. Named patterns may be used as stroke or brush definitions.

patternId: pattern identification for later reference

x, y: ordinates of top left corner

width, height of pattern space

func (*DrawingWand) Rectangle ¶

func (dw *DrawingWand) Rectangle(x1, y1, x2, y2 float64)

Draws a rectangle given two coordinates and using the current stroke, stroke width, and fill settings.

x1, y1: ordinates of first coordinate

x2, y2: ordinates of second coordinate

func (*DrawingWand) Rotate ¶

func (dw *DrawingWand) Rotate(degrees float64)

Applies the specified rotation to the current coordinate space.

degrees: degrees of rotation

func (*DrawingWand) RoundRectangle ¶

func (dw *DrawingWand) RoundRectangle(x1, y1, x2, y2, rx, ry float64)

Draws a rounted rectangle given two coordinates, x & y corner radiuses and using the current stroke, stroke width, and fill settings.

x1, y1: ordinates of first coordinate

x2, y2: ordinates of second coordinate

rx, ry: radius of corner in horizontal and vertical directions

func (*DrawingWand) Scale ¶

func (dw *DrawingWand) Scale(x, y float64)

Adjusts the scaling factor to apply in the horizontal and vertical directions to the current coordinate space.

x: horizontal scale factor

y: vertical scale factor

func (*DrawingWand) SetClipPath ¶

func (dw *DrawingWand) SetClipPath(clipMaskId string)

Associates a named clipping path with the image. Only the areas drawn on by the clipping path will be modified as C.ssize_t(as) it remains in effect. clipMaskId: name of clipping path to associate with image

func (*DrawingWand) SetClipRule ¶

func (dw *DrawingWand) SetClipRule(fillRule FillRule)

Set the polygon fill rule to be used by the clipping path.

func (*DrawingWand) SetClipUnits ¶

func (dw *DrawingWand) SetClipUnits(clipUnits ClipPathUnits)

Sets the interpretation of clip path units. clipUnits: units to use

func (*DrawingWand) SetFillColor ¶

func (dw *DrawingWand) SetFillColor(fillWand *PixelWand)

Sets the fill color to be used for drawing filled objects.

func (*DrawingWand) SetFillOpacity ¶

func (dw *DrawingWand) SetFillOpacity(opacity float64)

Sets the opacity to use when drawing using the fill color or fill texture. Fully opaque is 1.0.

func (*DrawingWand) SetFillPatternURL ¶

func (dw *DrawingWand) SetFillPatternURL(fillUrl string)

Sets the URL to use as a fill pattern for filling objects. Only local URLs ("#identifier") are supported at this time. These local URLs are normally created by defining a named fill pattern with PushPattern/PopPattern.

fillUrl: URL to use to obtain fill pattern.

func (*DrawingWand) SetFillRule ¶

func (dw *DrawingWand) SetFillRule(fillRule FillRule)

Sets the fill rule to use while drawing polygons.

func (*DrawingWand) SetFont ¶

func (dw *DrawingWand) SetFont(fontName string)

Sets the fully-sepecified font to use when annotating with text.

func (*DrawingWand) SetFontFamily ¶

func (dw *DrawingWand) SetFontFamily(fontFamily string)

Sets the font family to use when annotating with text.

func (*DrawingWand) SetFontSize ¶

func (dw *DrawingWand) SetFontSize(pointSize float64)

Sets the font pointsize to use when annotating with text.

pointSize: text pointsize

func (*DrawingWand) SetFontStretch ¶

func (dw *DrawingWand) SetFontStretch(fontStretch StretchType)

Sets the font stretch to use when annotating with text. The AnyStretch enumeration acts as a wild-card "don't care" option.

func (*DrawingWand) SetFontStyle ¶

func (dw *DrawingWand) SetFontStyle(style StyleType)

Sets the font style to use when annotating with text. The AnyStyle enumeration acts as a wild-card "don't care" option.

func (*DrawingWand) SetFontWeight ¶

func (dw *DrawingWand) SetFontWeight(fontWeight uint)

Sets the font weight to use when annotating with text.

fontWeight: font weight (valid range 100-900)

func (*DrawingWand) SetGravity ¶

func (dw *DrawingWand) SetGravity(gravity GravityType)

Sets the text placement gravity to use when annotating with text.

func (*DrawingWand) SetStrokeAntialias ¶

func (dw *DrawingWand) SetStrokeAntialias(antialias bool)

Controls whether stroked outlines are antialiased. Stroked outlines are antialiased by default. When antialiasing is disabled stroked pixels are thresholded to determine if the stroke color or underlying canvas color should be used.

antialias: set to false to disable antialiasing

func (*DrawingWand) SetStrokeColor ¶

func (dw *DrawingWand) SetStrokeColor(strokeWand *PixelWand)

Sets the color used for stroking object outlines.

func (*DrawingWand) SetStrokeDashArray ¶

func (dw *DrawingWand) SetStrokeDashArray(dash []float64)

Specifies the pattern of dashes and gaps used to stroke paths. The stroke dash array represents an array of numbers that specify the lengths of alternating dashes and gaps in pixels. If an odd number of values is provided, then the list of values is repeated to yield an even number of values. To remove an existing dash array, pass an empty slice. A typical stroke dash array might contain the members 5 3 2.

func (*DrawingWand) SetStrokeDashOffset ¶

func (dw *DrawingWand) SetStrokeDashOffset(offset float64)

Specifies the offset into the dash pattern to start the dash.

func (*DrawingWand) SetStrokeLineCap ¶

func (dw *DrawingWand) SetStrokeLineCap(lineCap LineCap)

Specifies the shape to be used at the end of open subpaths when they are stroked.

func (*DrawingWand) SetStrokeLineJoin ¶

func (dw *DrawingWand) SetStrokeLineJoin(lineJoin LineJoin)

Specifies the shape to be used at the corners of paths (or other vector shapes) when they are stroked.

func (*DrawingWand) SetStrokeMiterLimit ¶

func (dw *DrawingWand) SetStrokeMiterLimit(miterLimit uint)

Specifies the miter limit. When two line segments meet at a sharp angle and miter joins have been specified for 'lineJoin', it is possible for the miter to extend far beyond the thickness of the line stroking the path. The miterLimit' imposes a limit on the ratio of the miter length to the 'lineWidth'.

func (*DrawingWand) SetStrokeOpacity ¶

func (dw *DrawingWand) SetStrokeOpacity(opacity float64)

Specifies the opacity of stroked object outlines.

opacity: stroke opacity. The value 1.0 is opaque.

func (*DrawingWand) SetStrokePatternURL ¶

func (dw *DrawingWand) SetStrokePatternURL(strokeUrl string)

Sets the pattern used for stroking object outlines.

strokeUrl: URL specifying pattern ID (e.g. "#pattern_id")

func (*DrawingWand) SetStrokeWidth ¶

func (dw *DrawingWand) SetStrokeWidth(width float64)

Sets the width of the stroke used to draw object outlines.

func (*DrawingWand) SetTextAntialias ¶

func (dw *DrawingWand) SetTextAntialias(antialias bool)

Controls whether text is antialiased. Text is antialiased by default.

func (*DrawingWand) SetTextDecoration ¶

func (dw *DrawingWand) SetTextDecoration(decoration DecorationType)

Specifies a decoration to be applied when annotating with text.

func (*DrawingWand) SetTextEncoding ¶

func (dw *DrawingWand) SetTextEncoding(encoding string)

Specifies the code set to use for text annotations. The only character encoding which may be specified at this time is "UTF-8" for representing Unicode as a sequence of bytes. Specify an empty string to set text encoding to the system's default. Successful text annotation using Unicode may require fonts designed to support Unicode.

func (*DrawingWand) SetTextUnderColor ¶

func (dw *DrawingWand) SetTextUnderColor(underWand *PixelWand)

Specifies the color of a background rectangle to place under text annotations.

func (*DrawingWand) SetViewbox ¶

func (dw *DrawingWand) SetViewbox(x1, y1, x2, y2 uint)

Sets the overall canvas size to be recorded with the drawing vector data. Usually this will be specified using the same size as the canvas image. When the vector data is saved to SVG or MVG formats, the viewbox is use to specify the size of the canvas image that a viewer will render the vector data on.

x1: left x ordinate

y1: top y ordinate

x2: right x ordinate

y2: bottom y ordinate

func (*DrawingWand) SkewX ¶

func (dw *DrawingWand) SkewX(degrees float64)

Skews the current coordinate system in the horizontal direction.

degrees: number of degrees to skew the coordinates

func (*DrawingWand) SkewY ¶

func (dw *DrawingWand) SkewY(degrees float64)

Skews the current coordinate system in the vertical direction.

degrees: number of degrees to skew the coordinates

func (*DrawingWand) Translate ¶

func (dw *DrawingWand) Translate(x, y float64)

Applies a translation to the current coordinate system which moves the coordinate system origin to the specified coordinate.

x, y: new x, y ordinate for coordinate system origin

func (*DrawingWandException) Error ¶

func (dwe *DrawingWandException) Error() string

func (*ExceptionType) String ¶

func (et *ExceptionType) String() string

func (*MagickWand) AdaptiveThresholdImage ¶

func (mw *MagickWand) AdaptiveThresholdImage(width, height uint, offset int) error

Selects an individual threshold for each pixel based on the range of intensity values in its local neighborhood. This allows for thresholding of an image whose global intensity histogram doesn't contain distinctive peaks.

func (*MagickWand) AddImage ¶

func (mw *MagickWand) AddImage(wand *MagickWand) error

Adds a clone of the images from the second wand and inserts them into the first wand. Use SetLastIterator(), 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 SetFirstIterator() 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.

func (*MagickWand) AddNoiseImage ¶

func (mw *MagickWand) AddNoiseImage(noiseType NoiseType) error

Adds random noise to the image

func (*MagickWand) AffineTransformImage ¶

func (mw *MagickWand) AffineTransformImage(drawingWand *DrawingWand) error

Transforms an image as dictaded by the affine matrix of the drawing wand

func (*MagickWand) AnimateImages ¶

func (mw *MagickWand) AnimateImages(server string) error

Animates an image or image sequence

func (*MagickWand) AnnotateImage ¶

func (mw *MagickWand) AnnotateImage(drawingWand *DrawingWand, x, y, angle float64, text string) error

Annotates an image with text

x: ordinate to left of text

y: ordinate to text baseline

angle: rotate text relative to this angle

func (*MagickWand) AppendImages ¶

func (mw *MagickWand) AppendImages(topToBottom bool) *MagickWand

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 setting of the first image. Typically you would call either ResetIterator() or SetFirstImage() before calling this function to ensure that all the images in the wand's image list will be appended together. By default, images are stacked left-to-right. Set topToBottom to true to stack them top-to-bottom.

func (*MagickWand) AverageImages ¶

func (mw *MagickWand) AverageImages() *MagickWand

Average a set of images

func (*MagickWand) BlackThresholdImage ¶

func (mw *MagickWand) BlackThresholdImage(threshold *PixelWand) error

This is like ThresholdImage() but forces all pixels below the threshold into black while leaving all pixels above the threshold unchanged.

func (*MagickWand) BlurImage ¶

func (mw *MagickWand) BlurImage(radius, sigma float64) error

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.

radius: the radius of the, in pixels, not counting the center pixel.

sigma: the standard deviation of the, in pixels

func (*MagickWand) BorderImage ¶

func (mw *MagickWand) BorderImage(borderColor *PixelWand, width, height uint) error

Surrounds the image with a border of the color defined by the bordercolor pixel wand.

func (*MagickWand) CharcoalImage ¶

func (mw *MagickWand) CharcoalImage(radius, sigma float64) error

Simulates a charcoal drawing

radius: the radius of the Gaussian, in pixels, not counting the center pixel

sigma: the standard deviation of the Gaussian, in pixels

func (*MagickWand) ChopImage ¶

func (mw *MagickWand) ChopImage(width, height uint, x, y int) error

Removes a region of an image and collapses the image to occupy the removed portion.

width, height: the region width and height

x, y: the region x and y offsets

func (*MagickWand) ClipImage ¶

func (mw *MagickWand) ClipImage() error

Clips along the first path from the 8BIM profile, if present

func (*MagickWand) Clone ¶

func (mw *MagickWand) Clone() *MagickWand

Makes an exact copy of the MagickWand object

func (*MagickWand) CoalesceImages ¶

func (mw *MagickWand) CoalesceImages() *MagickWand

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. CoalesceImages() 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.

func (*MagickWand) ColorizeImage ¶

func (mw *MagickWand) ColorizeImage(colorize, opacity *PixelWand) error

Blends the fill color with each pixel in the image

func (*MagickWand) CommentImage ¶

func (mw *MagickWand) CommentImage(comment string) error

Adds a comment to your image

func (*MagickWand) CompareImageChannels ¶

func (mw *MagickWand) CompareImageChannels(reference *MagickWand, channel ChannelType, metric MetricType) (wand *MagickWand, distortion float64)

Compares one or more image channels of an image to a reconstructed image and returns the difference image

func (*MagickWand) CompareImages ¶

func (mw *MagickWand) CompareImages(reference *MagickWand, metric MetricType) (wand *MagickWand, distortion float64)

CompareImages() compares an image to a reconstructed image and returns the specified difference image. Returns the new MagickWand and the computed distortion between the images

func (*MagickWand) CompositeImage ¶

func (mw *MagickWand) CompositeImage(source *MagickWand, compose CompositeOperator, x, y int) error

Composite one image onto another at the specified offset. source: The magick wand holding source image. compose: This operator affects how the composite is applied to the image. The default is Over.

x: the column offset of the composited image.

y: the row offset of the composited image.

func (*MagickWand) ContrastImage ¶

func (mw *MagickWand) ContrastImage(sharpen bool) error

Enhances the intensity differences between the lighter and darker elements of the image. Set sharpen to a value other than 0 to increase the image contrast otherwise the contrast is reduced.

sharpen: increase or decrease image contrast

func (*MagickWand) ConvolveImage ¶

func (mw *MagickWand) ConvolveImage(order uint, kernel []float64) error

Applies a custom convolution kernel to the image.

order: the number of cols and rows in the filter kernel

kernel: an array of doubles, representing the convolution kernel

func (*MagickWand) CropImage ¶

func (mw *MagickWand) CropImage(width, height uint, x, y int) error

Extracts a region of the image

func (*MagickWand) CycleColormapImage ¶

func (mw *MagickWand) CycleColormapImage(displace int) error

Displaces an Image's colormap by a given number of positions. If you cycle the colormap a number of times you can produce a psychodelic effect.

func (*MagickWand) DeconstructImages ¶

func (mw *MagickWand) DeconstructImages() *MagickWand

Compares each image with the next in a sequence and returns the maximum bouding region of any pixel differences it discovers.

func (*MagickWand) DecreaseCount ¶

func (mw *MagickWand) DecreaseCount()

Decrease MagickWand ref counter and set according "can be terminated status"

func (*MagickWand) DescribeImage ¶

func (mw *MagickWand) DescribeImage() string

Describes an image by formatting its attributes to an allocated string which must be freed by the user. Attributes include the image width, height, size, and others. The string is similar to the output of 'identify -verbose'.

func (*MagickWand) DespeckleImage ¶

func (mw *MagickWand) DespeckleImage() error

Reduces the speckle noise in an image while perserving the edges of the original image.

func (*MagickWand) Destroy ¶

func (mw *MagickWand) Destroy()

Deallocates memory associated with an MagickWand

func (*MagickWand) DisplayImage ¶

func (mw *MagickWand) DisplayImage(server string) error

Displays and image

func (*MagickWand) DisplayImages ¶

func (mw *MagickWand) DisplayImages(server string) error

Displays and image or image sequence

func (*MagickWand) DrawImage ¶

func (mw *MagickWand) DrawImage(dw *DrawingWand) error

Draws vectors on the image as described by DrawingWand.

func (*MagickWand) EdgeImage ¶

func (mw *MagickWand) EdgeImage(radius float64) error

Enhance edges within the image with a convolution filter of the given radius. Use a radius of 0 and Edge() selects a suitable radius for you.

radius: the radius of the pixel neighborhood

func (*MagickWand) EmbossImage ¶

func (mw *MagickWand) EmbossImage(radius, sigma float64) error

Returns a grayscale image with a three-dimensional effect. We convolve the image with a Gaussian operator of the given radius and standard deviation (sigma). For reasonable results, radius should be larger than sigma. Use a radius of 0 and Emboss() selects a suitable radius for you.

radius: the radius of the Gaussian, in pixels, not counting the center pixel

sigma: the standard deviation of the Gaussian, in pixels

func (*MagickWand) EnhanceImage ¶

func (mw *MagickWand) EnhanceImage() error

Applies a digital filter that improves the quality of a noisy image

func (*MagickWand) EqualizeImage ¶

func (mw *MagickWand) EqualizeImage() error

Equalizes the image histogram.

func (*MagickWand) ExtentImage ¶

func (mw *MagickWand) ExtentImage(width, height uint, x, y int) error

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

width: the region width.

height: the region height.

x: the region x offset.

y: the region y offset.

func (*MagickWand) FlipImage ¶

func (mw *MagickWand) FlipImage() error

Creates a vertical mirror image by reflecting the pixels around the central x-axis.

func (*MagickWand) FlopImage ¶

func (mw *MagickWand) FlopImage() error

Creates a horizontal mirror image by reflecting the pixels around the central y-axis.

func (*MagickWand) FrameImage ¶

func (mw *MagickWand) FrameImage(matteColor *PixelWand, width, height uint, innerBevel, outerBevel int) error

Adds a simulated three-dimensional border around the image. The width and height specify the border width of the vertical and horizontal sides of the frame. The inner and outer bevels indicate the width of the inner and outer shadows of the frame.

matteColor: the frame color pixel wand.

width: the border width.

height: the border height.

innerBevel: the inner bevel width.

outerBevel: the outer bevel width.

func (*MagickWand) FxImage ¶

func (mw *MagickWand) FxImage(expression string) (fxmw *MagickWand, err error)

Evaluate expression for each pixel in the image.

func (*MagickWand) FxImageChannel ¶

func (mw *MagickWand) FxImageChannel(channel ChannelType, expression string) *MagickWand

Evaluate expression for each pixel in the image's channel

func (*MagickWand) GammaImage ¶

func (mw *MagickWand) GammaImage(gamma float64) error

Gamma-corrects an image. The same image viewed on different devices will have perceptual differences in the way the image's intensities are represented on the screen. Specify individual gamma levels for the red, green, and blue channels, or adjust all three with the gamma parameter. Values typically range from 0.8 to 2.3. You can also reduce the influence of a particular channel with a gamma value of 0.

func (*MagickWand) GammaImageChannel ¶

func (mw *MagickWand) GammaImageChannel(channel ChannelType, gamma float64) error

Gamma-corrects an image's channel. The same image viewed on different devices will have perceptual differences in the way the image's intensities are represented on the screen. Specify individual gamma levels for the red, green, and blue channels, or adjust all three with the gamma parameter. Values typically range from 0.8 to 2.3. You can also reduce the influence of a particular channel with a gamma value of 0.

func (*MagickWand) GetFilename ¶

func (mw *MagickWand) GetFilename() string

Returns the filename associated with an image sequence.

func (*MagickWand) GetImage ¶

func (mw *MagickWand) GetImage() *MagickWand

Gets the image at the current image index.

func (*MagickWand) GetImageAttribute ¶

func (mw *MagickWand) GetImageAttribute(attributeName string) string

Returns an image attribute as a string

func (*MagickWand) GetImageBackgroundColor ¶

func (mw *MagickWand) GetImageBackgroundColor() (bgColor *PixelWand, err error)

Returns the image background color.

func (*MagickWand) GetImageBluePrimary ¶

func (mw *MagickWand) GetImageBluePrimary() (x, y float64, err error)

Returns the chromaticy blue primary point for the image.

x: the chromaticity blue primary x-point.

y: the chromaticity blue primary y-point.

func (*MagickWand) GetImageBorderColor ¶

func (mw *MagickWand) GetImageBorderColor() (borderColor *PixelWand, err error)

Returns the image border color.

func (*MagickWand) GetImageChannelDepth ¶

func (mw *MagickWand) GetImageChannelDepth(channel ChannelType) uint

Gets the depth for one or more image channels.

func (*MagickWand) GetImageChannelMean ¶

func (mw *MagickWand) GetImageChannelMean(channel ChannelType) (mean, stdev float64, err error)

Gets the mean and standard deviation of one or more image channels.

func (*MagickWand) GetImageColormapColor ¶

func (mw *MagickWand) GetImageColormapColor(index uint) (color *PixelWand, err error)

Returns the color of the specified colormap index.

func (*MagickWand) GetImageColors ¶

func (mw *MagickWand) GetImageColors() uint

Gets the number of unique colors in the image.

func (*MagickWand) GetImageColorspace ¶

func (mw *MagickWand) GetImageColorspace() ColorspaceType

Gets the image colorspace.

func (*MagickWand) GetImageCompose ¶

func (mw *MagickWand) GetImageCompose() CompositeOperator

Returns the composite operator associated with the image.

func (*MagickWand) GetImageCompression ¶

func (mw *MagickWand) GetImageCompression() CompressionType

Gets the image compression.

func (*MagickWand) GetImageDelay ¶

func (mw *MagickWand) GetImageDelay() uint

Gets the image delay.

func (*MagickWand) GetImageDepth ¶

func (mw *MagickWand) GetImageDepth() uint

Gets the image depth.

func (*MagickWand) GetImageDispose ¶

func (mw *MagickWand) GetImageDispose() DisposeType

Gets the image disposal method.

func (*MagickWand) GetImageFilename ¶

func (mw *MagickWand) GetImageFilename() string

Returns the filename of a particular image in a sequence.

func (*MagickWand) GetImageFormat ¶

func (mw *MagickWand) GetImageFormat() string

Returns the format of a particular image in a sequence.

func (*MagickWand) GetImageFuzz ¶

func (mw *MagickWand) GetImageFuzz() float64

Gets the image fuzz.

func (*MagickWand) GetImageGamma ¶

func (mw *MagickWand) GetImageGamma() float64

Gets the image gamma.

func (*MagickWand) GetImageGravity ¶

func (mw *MagickWand) GetImageGravity() GravityType

Gets the image gravity.

func (*MagickWand) GetImageGreenPrimary ¶

func (mw *MagickWand) GetImageGreenPrimary() (x, y float64, err error)

Returns the chromaticy green primary point.

x: the chromaticity green primary x-point.

y: the chromaticity green primary y-point.

func (*MagickWand) GetImageHeight ¶

func (mw *MagickWand) GetImageHeight() uint

Returns the image height.

func (*MagickWand) GetImageHistogram ¶

func (mw *MagickWand) GetImageHistogram() (numberColors uint, pws []PixelWand)

Returns the image histogram as an array of PixelWand wands.

numberColors: the number of unique colors in the image and the number of pixel wands returned.

func (*MagickWand) GetImageIndex ¶

func (mw *MagickWand) GetImageIndex() uint

Returns the position of the iterator in the image list

func (*MagickWand) GetImageInterlaceScheme ¶

func (mw *MagickWand) GetImageInterlaceScheme() InterlaceType

Gets the image interlace scheme.

func (*MagickWand) GetImageIterations ¶

func (mw *MagickWand) GetImageIterations() uint

Gets the image iterations.

func (*MagickWand) GetImageMatteColor ¶

func (mw *MagickWand) GetImageMatteColor() (matteColor *PixelWand, err error)

Returns the image matte color.

func (*MagickWand) GetImagePage ¶

func (mw *MagickWand) GetImagePage() (w, h uint, x, y int, err error)

Returns the page geometry associated with the image.

w, h: the page width and height

x, h: the page x-offset and y-offset.

func (*MagickWand) GetImageRedPrimary ¶

func (mw *MagickWand) GetImageRedPrimary() (x, y float64, err error)

Returns the chromaticy red primary point.

x, y: the chromaticity red primary x/y-point.

func (*MagickWand) GetImageResolution ¶

func (mw *MagickWand) GetImageResolution() (x, y float64, err error)

Gets the image X and Y resolution.

func (*MagickWand) GetImageSavedType ¶

func (mw *MagickWand) GetImageSavedType() ImageType

Gets the image type that will be used when the image is saved. This may be different to the current image type, returned by GetImageType().

func (*MagickWand) GetImageSignature ¶

func (mw *MagickWand) GetImageSignature() string

Generates an SHA-256 message digest for the image pixel stream.

func (*MagickWand) GetImageType ¶

func (mw *MagickWand) GetImageType() ImageType

Gets the potential image type To ensure the image type matches its potential, use SetImageType(): wand.SetImageType(wand.GetImageType())

func (*MagickWand) GetImageUnits ¶

func (mw *MagickWand) GetImageUnits() ResolutionType

Gets the image units of resolution.

func (*MagickWand) GetImageWhitePoint ¶

func (mw *MagickWand) GetImageWhitePoint() (x, y float64, err error)

Returns the chromaticy white point.

x, y: the chromaticity white x/y-point.

func (*MagickWand) GetImageWidth ¶

func (mw *MagickWand) GetImageWidth() uint

Returns the image width.

func (*MagickWand) GetLastError ¶

func (mw *MagickWand) GetLastError() error

Returns the kind, reason and description of any error that occurs when using other methods in this API

func (*MagickWand) GetNumberImages ¶

func (mw *MagickWand) GetNumberImages() uint

Returns the number of images associated with a magick wand.

func (*MagickWand) GetSamplingFactors ¶

func (mw *MagickWand) GetSamplingFactors() (factors []float64)

Gets the horizontal and vertical sampling factor.

func (*MagickWand) GetSize ¶

func (mw *MagickWand) GetSize() (uint, uint, error)

Returns the size associated with the magick wand.

func (*MagickWand) HaldClutImage ¶

func (mw *MagickWand) HaldClutImage(hald *MagickWand) error

Replaces colors in the image from a Hald color lookup table. A Hald color lookup table is a 3-dimensional color cube mapped to 2 dimensions. Create it with the HALD coder. You can apply any color transformation to the Hald image and then use this method to apply the transform to the image.

func (*MagickWand) HasNextImage ¶

func (mw *MagickWand) HasNextImage() bool

Returns true if the wand has more images when traversing the list in the forward direction

func (*MagickWand) HasPreviousImage ¶

func (mw *MagickWand) HasPreviousImage() bool

Returns true if the wand has more images when traversing the list in the reverse direction

func (*MagickWand) ImplodeImage ¶

func (mw *MagickWand) ImplodeImage(radius float64) error

Creates a new image that is a copy of an existing one with the image pixels "implode" by the specified percentage.

func (*MagickWand) IncreaseCount ¶

func (mw *MagickWand) IncreaseCount()

Increase MagickWand ref counter and set according "can`t be terminated status"

func (*MagickWand) LabelImage ¶

func (mw *MagickWand) LabelImage(label string) error

Adds a label to your image.

func (*MagickWand) LevelImage ¶

func (mw *MagickWand) LevelImage(blackPoint, gamma, whitePoint float64) error

Adjusts the levels of an image by scaling the colors falling between specified white and black points to the full available quantum range. The parameters provided represent the black, mid, and white points. The black point specifies the darkest color in the image. Colors darker than the black point are set to zero. Mid point specifies a gamma correction to apply to the image. White point specifies the lightest color in the image. Colors brighter than the white point are set to the maximum quantum value.

func (*MagickWand) LevelImageChannel ¶

func (mw *MagickWand) LevelImageChannel(channel ChannelType, blackPoint, gamma, whitePoint float64) error

Adjusts the levels of an image by scaling the colors falling between specified white and black points to the full available quantum range. The parameters provided represent the black, mid, and white points. The black point specifies the darkest color in the image. Colors darker than the black point are set to zero. Mid point specifies a gamma correction to apply to the image. White point specifies the lightest color in the image. Colors brighter than the white point are set to the maximum quantum value.

func (*MagickWand) MagickGetImageGeometry ¶

func (mw *MagickWand) MagickGetImageGeometry() string

Gets the image geometry string. NULL is returned if the image does not contain a geometry string.

func (*MagickWand) MagnifyImage ¶

func (mw *MagickWand) MagnifyImage() error

This is a convenience method that scales an image proportionally to twice its original size.

func (*MagickWand) MapImage ¶

func (mw *MagickWand) MapImage(from *MagickWand, dither uint) error

Replaces the colors of an image with the closest color from a reference image.

from: reference image

dither: Set this integer value to something other than zero to dither the mapped image.

func (*MagickWand) MatteFloodfillImage ¶

func (mw *MagickWand) MatteFloodfillImage(opacity Quantum, fuzz float64, borderColor *PixelWand, x int, y int) error

Changes the transparency value of any pixel that matches target and is an immediate neighbor. If the method FillToBorderMethod is specified, the transparency value is changed for any neighbor pixel that does not match the bordercolor member of image.

func (*MagickWand) MedianFilterImage ¶

func (mw *MagickWand) MedianFilterImage(radius float64) error

Applies a digital filter that improves the quality of a noisy image. Each pixel is replaced by the median in a set of neighboring pixels as defined by radius.

func (*MagickWand) MinifyImage ¶

func (mw *MagickWand) MinifyImage() error

This is a convenience method that scales an image proportionally to one-half its original size

func (*MagickWand) ModulateImage ¶

func (mw *MagickWand) ModulateImage(brightness, saturation, hue float64) error

Lets you control the brightness, saturation, and hue of an image. Hue is the percentage of absolute rotation from the current position. For example 50 results in a counter-clockwise rotation of 90 degrees, 150 results in a clockwise rotation of 90 degrees, with 0 and 200 both resulting in a rotation of 180 degrees. To increase the color brightness by 20 and decrease the color saturation by 10 and leave the hue unchanged, use: 120, 90, 100.

brightness: the percent change in brighness.

saturation: the percent change in saturation.

hue: the percent change in hue.

func (*MagickWand) MontageImage ¶

func (mw *MagickWand) MontageImage(dw *DrawingWand, tileGeo string, thumbGeo string, mode MontageMode, frame string) *MagickWand

Creates a composite image by combining several separate images. The images are tiled on the composite image with the name of the image optionally appearing just below the individual tile.

dw: the drawing wand. The font name, size, and color are obtained from this wand.

tileGeo: the number of tiles per row and page (e.g. 6x4+0+0).

thumbGeo: Preferred image size and border size of each thumbnail (e.g. 120x120+4+3>).

mode: Thumbnail framing mode: Frame, Unframe, or Concatenate.

frame: Surround the image with an ornamental border (e.g. 15x15+3+3). The frame color is that of the thumbnail's matte color.

func (*MagickWand) MorphImages ¶

func (mw *MagickWand) MorphImages(numFrames uint) *MagickWand

Method morphs a set of images. Both the image pixels and size are linearly interpolated to give the appearance of a meta-morphosis from one image to the next.

numFrames: the number of in-between images to generate.

func (*MagickWand) MosaicImages ¶

func (mw *MagickWand) MosaicImages() *MagickWand

inlays an image sequence to form a single coherent picture. It returns a wand with each image in the sequence composited at the location defined by the page offset of the image.

func (*MagickWand) MotionBlurImage ¶

func (mw *MagickWand) MotionBlurImage(radius, sigma, angle float64) error

Simulates motion blur. We convolve the image with a Gaussian operator of the given radius and standard deviation (sigma). For reasonable results, radius should be larger than sigma. Use a radius of 0 and MotionBlurImage() selects a suitable radius for you. Angle gives the angle of the blurring motion.

radius: the radius of the Gaussian, in pixels, not counting the center pixel.

sigma: the standard deviation of the Gaussian, in pixels.

angle: apply the effect along this angle.

func (*MagickWand) NegateImage ¶

func (mw *MagickWand) NegateImage(gray bool) error

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.

gray: If true, only negate grayscale pixels within the image.

func (*MagickWand) NegateImageChannel ¶

func (mw *MagickWand) NegateImageChannel(channel ChannelType, gray bool) error

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.

gray: If true, only negate grayscale pixels within the image.

func (*MagickWand) NextImage ¶

func (mw *MagickWand) NextImage() bool

Sets the next image in the wand as the current image. It is typically used after ResetIterator(), after which its first use will set the first image as the current image (unless the wand is empty). It will return false when no more images are left to be returned which happens when the wand is empty, or the current image is the last image. When the above condition (end of image list) is reached, the iterator is automaticall set so that you can start using PreviousImage() to again/ iterate over the images in the reverse direction, starting with the last image (again). You can jump to this condition immeditally using SetLastIterator().

func (*MagickWand) NormalizeImage ¶

func (mw *MagickWand) NormalizeImage() error

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.

func (*MagickWand) OilPaintImage ¶

func (mw *MagickWand) OilPaintImage(radius float64) error

Applies a special effect filter that simulates an oil painting. Each pixel is replaced by the most frequent color occurring in a circular region defined by radius.

radius: the radius of the circular neighborhood.

func (*MagickWand) OpaqueImage ¶

func (mw *MagickWand) OpaqueImage(target, fill *PixelWand, fuzz float64) error

func (*MagickWand) PingImage ¶

func (mw *MagickWand) PingImage(filename string) error

This is like ReadImage() except the only valid information returned is the image width, height, size, and format. It is designed to efficiently obtain this information from a file without reading the entire image sequence into memory.

func (*MagickWand) PreviewImages ¶

func (mw *MagickWand) PreviewImages(preview PreviewType) *MagickWand

Tiles 9 thumbnails of the specified image with an image processing operation applied at varying strengths. This helpful to quickly pin-point an appropriate parameter for an image processing operation.

func (*MagickWand) PreviousImage ¶

func (mw *MagickWand) PreviousImage() bool

Sets the previous image in the wand as the current image. It is typically used after SetLastIterator(), after which its first use will set the last image as the current image (unless the wand is empty). It will return false when no more images are left to be returned which happens when the wand is empty, or the current image is the first image. At that point the iterator is than reset to again process images in the forward direction, again starting with the first image in list. Images added at this point are prepended. Also at that point any images added to the wand using AddImages() or ReadImages() will be prepended before the first image. In this sense the condition is not quite exactly the same as ResetIterator().

func (*MagickWand) QuantizeImage ¶

func (mw *MagickWand) QuantizeImage(numColors uint, colorspace ColorspaceType, treedepth uint, dither bool, measureError bool) error

Analyzes the colors within a reference image and chooses a fixed number of colors to represent the image. The goal of the algorithm is to minimize the color difference between the input and output image while minimizing the processing time.

numColors: the number of colors.

colorspace: Perform color reduction in this colorspace, typically RGBColorspace.

treedepth: Normally, this integer value is zero or one. A zero or one tells Quantize to choose a optimal tree depth of Log4(number_colors). A tree of this depth generally allows the best representation of the reference image with the least amount of memory and the fastest computational speed. In some cases, such as an image with low color dispersion (a few number of colors), a value other than Log4(number_colors) is required. To expand the color tree completely, use a value of 8.

dither: A value other than zero distributes the difference between an original image and the corresponding color reduced image to neighboring pixels along a Hilbert curve.

measureError: A value other than zero measures the difference between the original and quantized images. This difference is the total quantization error. The error is computed by summing over all pixels in an image the distance squared in RGB space between each reference pixel value and its quantized value.

func (*MagickWand) QuantizeImages ¶

func (mw *MagickWand) QuantizeImages(numColors uint, colorspace ColorspaceType, treedepth uint, dither bool, measureError bool) error

Analyzes the colors within a sequence of images and chooses a fixed number of colors to represent the image. The goal of the algorithm is to minimize the color difference between the input and output image while minimizing the processing time.

numColors: the number of colors.

colorspace: Perform color reduction in this colorspace, typically RGBColorspace.

treedepth: Normally, this integer value is zero or one. A zero or one tells Quantize to choose a optimal tree depth of Log4(number_colors). A tree of this depth generally allows the best representation of the reference image with the least amount of memory and the fastest computational speed. In some cases, such as an image with low color dispersion (a few number of colors), a value other than Log4(number_colors) is required. To expand the color tree completely, use a value of 8.

dither: A value other than zero distributes the difference between an original image and the corresponding color reduced image to neighboring pixels along a Hilbert curve.

measureError: A value other than zero measures the difference between the original and quantized images. This difference is the total quantization error. The error is computed by summing over all pixels in an image the distance squared in RGB space between each reference pixel value and its quantized value.

func (*MagickWand) QueryFontMetrics ¶

func (mw *MagickWand) QueryFontMetrics(dw *DrawingWand, textLine string) *FontMetrics

Returns a FontMetrics struct

func (*MagickWand) QueryFonts ¶

func (mw *MagickWand) QueryFonts(pattern string) (fonts []string)

Returns any font that match the specified pattern (e.g. "*" for all)

func (*MagickWand) QueryFormats ¶

func (mw *MagickWand) QueryFormats(pattern string) (formats []string)

Returns any supported image format that match the specified pattern (e.g. "*" for all)

func (*MagickWand) RadialBlurImage ¶

func (mw *MagickWand) RadialBlurImage(angle float64) error

Radial blurs an image.

func (*MagickWand) RaiseImage ¶

func (mw *MagickWand) RaiseImage(width uint, height uint, x int, y int, raise bool) error

Creates a simulated three-dimensional button-like effect by lightening and darkening the edges of the image. Members width and height of raise_info define the width of the vertical and horizontal edge of the effect. width,

height, x, y: Define the dimensions of the area to raise.

raise: A value other than zero creates a 3-D raise effect, otherwise it has a lowered effect.

func (*MagickWand) ReadImage ¶

func (mw *MagickWand) ReadImage(filename string) error

Reads an image or image sequence. The images are inserted at the current image pointer position. Use SetFirstIterator(), SetLastIterator, or SetImageIndex() to specify the current image pointer position at the beginning of the image list, the end, or anywhere in-between respectively.

func (*MagickWand) ReadImageBlob ¶

func (mw *MagickWand) ReadImageBlob(blob []byte) error

Reads an image or image sequence from a blob.

func (*MagickWand) ReadImageFile ¶

func (mw *MagickWand) ReadImageFile(img *os.File) error

Reads an image or image sequence from an open file descriptor.

func (*MagickWand) ReduceNoiseImage ¶

func (mw *MagickWand) ReduceNoiseImage(radius float64) error

Smooths the contours o an image while still preserving edge information. The algorithm works by replacing each pixel with its neighbor closes in value. A neighbor is defined by radius. Use a radius of 0 and the function selects a suitable radius for you.

func (*MagickWand) RemoveImage ¶

func (mw *MagickWand) RemoveImage() error

Removes an image from the image list.

func (*MagickWand) RemoveImageProfile ¶

func (mw *MagickWand) RemoveImageProfile(name string) []byte

Removes the named image profile and returns it.

name: name of profile to return: ICC, IPTC, or generic profile.

func (*MagickWand) ResampleImage ¶

func (mw *MagickWand) ResampleImage(xRes, yRes float64, filter FilterType, blur float64) error

Resample image to desired resolution.

xRes/yRes: the new image x/y resolution.

filter: Image filter to use.

blur: the blur factor where > 1 is blurry, < 1 is sharp.

func (*MagickWand) ResetIterator ¶

func (mw *MagickWand) ResetIterator()

This method resets the wand iterator. It is typically used either before iterating though images, or before calling specific methods such as AppendImages() to append all images together. Afterward you can use NextImage() to iterate over all the images in a wand container, starting with the first image. Using this before AddImages() or ReadImages() will cause new images to be inserted between the first and second image.

func (*MagickWand) ResizeImage ¶

func (mw *MagickWand) ResizeImage(cols, rows uint, filter FilterType, blur float64) error

Scales an image to the desired dimensions

cols: the number of cols in the scaled image.

rows: the number of rows in the scaled image.

filter: Image filter to use.

blur: the blur factor where > 1 is blurry, < 1 is sharp.

func (*MagickWand) RollImage ¶

func (mw *MagickWand) RollImage(x, y int) error

Offsets an image as defined by x and y.

x: the x offset.

y: the y offset.

func (*MagickWand) RotateImage ¶

func (mw *MagickWand) RotateImage(background *PixelWand, degrees float64) error

Rotates an image the specified number of degrees. Empty triangles left over from rotating the image are filled with the background color.

background: the background pixel wand.

degrees: the number of degrees to rotate the image.

func (*MagickWand) SampleImage ¶

func (mw *MagickWand) SampleImage(cols, rows uint) error

Scales an image to the desired dimensions with pixel sampling. Unlike other scaling methods, this method does not introduce any additional color into the scaled image.

func (*MagickWand) ScaleImage ¶

func (mw *MagickWand) ScaleImage(cols, rows uint) error

Scales the size of an image to the given dimensions.

func (*MagickWand) SeparateImageChannel ¶

func (mw *MagickWand) SeparateImageChannel(channel ChannelType) error

Separates a channel from the image and returns a grayscale image. A channel is a particular color component of each pixel in the image.

func (*MagickWand) SetCompressionQuality ¶

func (mw *MagickWand) SetCompressionQuality(quality uint) error

Sets the wand compression quality.

func (*MagickWand) SetFormat ¶

func (mw *MagickWand) SetFormat(format string) error

Sets the format of the magick wand.

func (*MagickWand) SetImage ¶

func (mw *MagickWand) SetImage(source *MagickWand) error

Replaces the last image returned by SetImageIndex(), NextImage(), PreviousImage() with the images from the specified wand.

func (*MagickWand) SetImageAttribute ¶

func (mw *MagickWand) SetImageAttribute(name, value string) error

Sets an image attribute

func (*MagickWand) SetImageBackgroundColor ¶

func (mw *MagickWand) SetImageBackgroundColor(background *PixelWand) error

Sets the image background color.

func (*MagickWand) SetImageBluePrimary ¶

func (mw *MagickWand) SetImageBluePrimary(x, y float64) error

Sets the image chromaticity blue primary point.

func (*MagickWand) SetImageBorderColor ¶

func (mw *MagickWand) SetImageBorderColor(border *PixelWand) error

Sets the image border color.

func (*MagickWand) SetImageChannelDepth ¶

func (mw *MagickWand) SetImageChannelDepth(channel ChannelType, depth uint) error

Sets the depth of a particular image channel.

depth: the image depth in bits.

func (*MagickWand) SetImageColormapColor ¶

func (mw *MagickWand) SetImageColormapColor(index uint, color *PixelWand) error

Sets the color of the specified colormap index.

index: the offset into the image colormap.

color: return the colormap color in this wand.

func (*MagickWand) SetImageColorspace ¶

func (mw *MagickWand) SetImageColorspace(colorspace ColorspaceType) error

Sets the image colorspace.

func (*MagickWand) SetImageCompose ¶

func (mw *MagickWand) SetImageCompose(compose CompositeOperator) error

Sets the image composite operator, useful for specifying how to composite / the image thumbnail when using the MontageImage() method.

func (*MagickWand) SetImageCompression ¶

func (mw *MagickWand) SetImageCompression(compression CompressionType) error

Sets the image compression.

func (*MagickWand) SetImageDelay ¶

func (mw *MagickWand) SetImageDelay(delay uint) error

Sets the image delay.

delay: the image delay in ticks-per-second units.

func (*MagickWand) SetImageDepth ¶

func (mw *MagickWand) SetImageDepth(depth uint) error

Sets the image depth.

depth: the image depth in bits: 8, 16, or 32.

func (*MagickWand) SetImageDispose ¶

func (mw *MagickWand) SetImageDispose(dispose DisposeType) error

Sets the image disposal method.

func (*MagickWand) SetImageFilename ¶

func (mw *MagickWand) SetImageFilename(filename string) error

Sets the filename of a particular image in a sequence.

func (*MagickWand) SetImageFormat ¶

func (mw *MagickWand) SetImageFormat(format string) error

Sets the format of a particular image in a sequence.

format: the image format.

func (*MagickWand) SetImageFuzz ¶

func (mw *MagickWand) SetImageFuzz(fuzz float64) error

Sets the image fuzz.

func (*MagickWand) SetImageGamma ¶

func (mw *MagickWand) SetImageGamma(gamma float64) error

Sets the image gamma.

func (*MagickWand) SetImageGravity ¶

func (mw *MagickWand) SetImageGravity(gravity GravityType) error

Sets the image gravity type.

func (*MagickWand) SetImageGreenPrimary ¶

func (mw *MagickWand) SetImageGreenPrimary(x, y float64) error

Sets the image chromaticity green primary point.

func (*MagickWand) SetImageIndex ¶

func (mw *MagickWand) SetImageIndex(index int) bool

This method set the iterator to the given position in the image list specified with the index parameter. A zero index will set the first image as current, and so on. Negative indexes can be used to specify an image relative to the end of the images in the wand, with -1 being the last image in the wand. If the index is invalid (range too large for number of images in wand) the function will return false. In that case the current image will not change. After using any images added to the wand using AddImage() or ReadImage() will be added after the image indexed, regardless of if a zero (first image in list) or negative index (from end) is used. Jumping to index 0 is similar to ResetIterator() but differs in how NextImage() behaves afterward.

func (*MagickWand) SetImageInterlaceScheme ¶

func (mw *MagickWand) SetImageInterlaceScheme(interlace InterlaceType) error

Sets the image interlace scheme.

func (*MagickWand) SetImageIterations ¶

func (mw *MagickWand) SetImageIterations(iterations uint) error

Sets the image iterations.

func (*MagickWand) SetImageMatte ¶

func (mw *MagickWand) SetImageMatte(matte bool) error

Sets the image matte channel.

func (*MagickWand) SetImageMatteColor ¶

func (mw *MagickWand) SetImageMatteColor(matte *PixelWand) error

Sets the image matte color.

func (*MagickWand) SetImagePage ¶

func (mw *MagickWand) SetImagePage(width, height uint, x, y int) error

Sets the page geometry of the image.

func (*MagickWand) SetImageRedPrimary ¶

func (mw *MagickWand) SetImageRedPrimary(x, y float64) error

Sets the image chromaticity red primary point.

func (*MagickWand) SetImageRenderingIntent ¶

func (mw *MagickWand) SetImageRenderingIntent(ri RenderingIntent) error

Sets the image rendering intent.

func (*MagickWand) SetImageResolution ¶

func (mw *MagickWand) SetImageResolution(xRes, yRes float64) error

Sets the image resolution.

func (*MagickWand) SetImageSavedType ¶

func (mw *MagickWand) SetImageSavedType(it ImageType) error

Sets the image type that will be used when the image is saved.

func (*MagickWand) SetImageScene ¶

func (mw *MagickWand) SetImageScene(scene uint) error

Sets the image scene.

func (*MagickWand) SetImageType ¶

func (mw *MagickWand) SetImageType(imgtype ImageType) error

Sets the image type.

func (*MagickWand) SetImageUnits ¶

func (mw *MagickWand) SetImageUnits(units ResolutionType) error

Sets the image units of resolution.

func (*MagickWand) SetImageVirtualPixelMethod ¶

func (mw *MagickWand) SetImageVirtualPixelMethod(method VirtualPixelMethod) VirtualPixelMethod

Sets the image virtual pixel method.

func (*MagickWand) SetImageWhitePoint ¶

func (mw *MagickWand) SetImageWhitePoint(x, y float64) error

Sets the image chromaticity white point.

func (*MagickWand) SetInterlaceScheme ¶

func (mw *MagickWand) SetInterlaceScheme(scheme InterlaceType) error

Sets the image interlacing scheme

func (*MagickWand) SetPassphrase ¶

func (mw *MagickWand) SetPassphrase(passphrase string) error

Sets the passphrase.

func (*MagickWand) SetResolution ¶

func (mw *MagickWand) SetResolution(xRes, yRes float64) error

Sets the image resolution.

func (*MagickWand) SetResolutionUnits ¶

func (mw *MagickWand) SetResolutionUnits(units ResolutionType) error

Sets the resolution units of the magick wand. It should be used in conjunction with SetResolution(). This method works both before and after an image has been read.

func (*MagickWand) SetResourceLimit ¶

func (mw *MagickWand) SetResourceLimit(rtype ResourceType, limit uint) error

Sets the limit for a particular resource in megabytes.

func (*MagickWand) SetSamplingFactors ¶

func (mw *MagickWand) SetSamplingFactors(samplingFactors []float64) error

Sets the image sampling factors.

samplingFactors: An array of floats representing the sampling factor for each color component (in RGB order).

func (*MagickWand) SetSize ¶

func (mw *MagickWand) SetSize(width, heigh uint) error

Sets the size of the magick wand. Set it before you read a raw image format such as RGB, GRAY, or CMYK.

func (*MagickWand) SharpenImage ¶

func (mw *MagickWand) SharpenImage(radius, sigma float64) error

Sharpens 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 SharpenImage() selects a suitable radius for you.

radius: the radius of the Gaussian, in pixels, not counting the center pixel.

sigma: the standard deviation of the Gaussian, in pixels.

func (*MagickWand) ShaveImage ¶

func (mw *MagickWand) ShaveImage(cols, rows uint) error

Shaves pixels from the image edges. It allocates the memory necessary for the new Image structure and returns a pointer to the new image.

func (*MagickWand) ShearImage ¶

func (mw *MagickWand) ShearImage(background *PixelWand, xShear, yShear float64) error

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, xShear is measured relative to the Y axis, and similarly, for Y direction shears yShear is measured relative to the X axis. Empty triangles left over from shearing the image are filled with the background color.

func (*MagickWand) SolarizeImage ¶

func (mw *MagickWand) SolarizeImage(threshold float64) error

Applies a special effect to the image, similar to the effect achieved in a photo darkroom by selectively exposing areas of photo sensitive paper to light. Threshold ranges from 0 to QuantumRange and is a measure of the extent of the solarization.

threshold: define the extent of the solarization.

func (*MagickWand) SpreadImage ¶

func (mw *MagickWand) SpreadImage(radius float64) error

Is a special effects method that randomly displaces each pixel in a block defined by the radius parameter.

radius: Choose a random pixel in a neighborhood of this extent.

func (*MagickWand) SteganoImage ¶

func (mw *MagickWand) SteganoImage(watermark *MagickWand, offset int) *MagickWand

Hides a digital watermark within the image. Recover the hidden watermark later to prove that the authenticity of an image. Offset defines the start position within the image to hide the watermark.

offset: start hiding at this offset into the image.

func (*MagickWand) StereoImage ¶

func (mw *MagickWand) StereoImage(offset *MagickWand) *MagickWand

Composites two images and produces a single image that is the composite of a left and right image of a stereo pair.

func (*MagickWand) StripImage ¶

func (mw *MagickWand) StripImage() error

Strips an image of all profiles and comments.

func (*MagickWand) SwirlImage ¶

func (mw *MagickWand) SwirlImage(degrees float64) error

Swirls the pixels about the center of the image, where degrees indicates the sweep of the arc through which each pixel is moved. You get a more dramatic effect as the degrees move from 1 to 360.

degrees: define the tightness of the swirling effect.

func (*MagickWand) TextureImage ¶

func (mw *MagickWand) TextureImage(texture *MagickWand) *MagickWand

Repeatedly tiles the texture image across and down the image canvas.

func (*MagickWand) ThresholdImage ¶

func (mw *MagickWand) ThresholdImage(threshold float64) error

Changes the value of individual pixels based on the intensity of each pixel compared to threshold. The result is a high-contrast, two color image.

threshold: define the threshold value.

func (*MagickWand) ThresholdImageChannel ¶

func (mw *MagickWand) ThresholdImageChannel(channel ChannelType, threshold float64) error

Changes the value of individual pixels based on the intensity of each pixel compared to threshold. The result is a high-contrast, two color image.

threshold: define the threshold value.

func (*MagickWand) TintImage ¶

func (mw *MagickWand) TintImage(tint, opacity *PixelWand) error

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)))).

tint: the tint pixel wand.

opacity: the opacity pixel wand.

func (*MagickWand) TransformImage ¶

func (mw *MagickWand) TransformImage(crop string, geometry string) *MagickWand

Is a convenience method that behaves like ResizeImage() or CropImage() but accepts scaling and/or cropping information as a region geometry specification. If the operation fails, a NULL image handle is returned. crop: a crop geometry string. This geometry defines a subregion of the image to crop. geometry: an image geometry string. This geometry defines the final size of the image.

func (*MagickWand) TransparentImage ¶

func (mw *MagickWand) TransparentImage(target *PixelWand, opacity C.Quantum, fuzz float64) error

Changes any pixel that matches color with the color defined by fill.

func (*MagickWand) TrimImage ¶

func (mw *MagickWand) TrimImage(fuzz float64) error

Remove edges that are the background color from the image.

fuzz: 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.

func (*MagickWand) UnsharpMaskImage ¶

func (mw *MagickWand) UnsharpMaskImage(radius, sigma, amount, threshold float64) error

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

radius: the radius of the Gaussian, in pixels, not counting the center pixel.

sigma: the standard deviation of the Gaussian, in pixels.

amount: the percentage of the difference between the original and the blur image that is added back into the original.

threshold: the threshold in pixels needed to apply the diffence amount.

func (*MagickWand) WaveImage ¶

func (mw *MagickWand) WaveImage(amplitude, wavelength float64) error

Creates a "ripple" effect in the image by shifting the pixels vertically along a sine wave whose amplitude and wavelength is specified by the given parameters.

amplitude, wavelength: Define the amplitude and wave length of the sine wave.

func (*MagickWand) WhiteThresholdImage ¶

func (mw *MagickWand) WhiteThresholdImage(threshold *PixelWand) error

Is like ThresholdImage() but force all pixels above the threshold into white while leaving all pixels below the threshold unchanged.

func (*MagickWand) WriteImage ¶

func (mw *MagickWand) WriteImage(filename string) error

Writes an image to the specified filename.

func (*MagickWand) WriteImageBlob ¶

func (mw *MagickWand) WriteImageBlob() []byte

Implements direct to memory image formats. It returns the image as a byte array (a formatted "file" in memory), starting from the current position in the image sequence. Use MagickSetImageFormat() to set the format to write to the blob (GIF, JPEG, PNG, etc.).

func (*MagickWand) WriteImageFile ¶

func (mw *MagickWand) WriteImageFile(out *os.File) error

Writes an image sequence to an open file descriptor.

func (*MagickWand) WriteImages ¶

func (mw *MagickWand) WriteImages(filename string, adjoin bool) error

Writes an image or image sequence.

func (*MagickWand) WriteImagesFile ¶

func (mw *MagickWand) WriteImagesFile(out *os.File, adjoin bool) error

Writes an image sequence to an open file descriptor.

func (*MagickWandException) Error ¶

func (mwe *MagickWandException) Error() string

func (*PixelWand) Clone ¶

func (pw *PixelWand) Clone() *PixelWand

Makes an exact copy of the wand

func (*PixelWand) DecreaseCount ¶

func (pw *PixelWand) DecreaseCount()

Decrease PixelWand ref counter and set according "can be terminated status"

func (*PixelWand) Destroy ¶

func (pw *PixelWand) Destroy()

Deallocates resources associated with a pixel wand

func (*PixelWand) GetBlack ¶

func (pw *PixelWand) GetBlack() float64

Returns the normalized black color of the pixel wand

func (*PixelWand) GetBlackQuantum ¶

func (pw *PixelWand) GetBlackQuantum() Quantum

Returns the black color of the pixel wand

func (*PixelWand) GetBlue ¶

func (pw *PixelWand) GetBlue() float64

Returns the normalized blue color of the pixel wand

func (*PixelWand) GetBlueQuantum ¶

func (pw *PixelWand) GetBlueQuantum() Quantum

Returns the blue color of the pixel wand

func (*PixelWand) GetColorAsString ¶

func (pw *PixelWand) GetColorAsString() string

Returns the color of the pixel wand as a string

func (*PixelWand) GetColorCount ¶

func (pw *PixelWand) GetColorCount() uint

Returns the color count associated with this color

func (*PixelWand) GetCyan ¶

func (pw *PixelWand) GetCyan() float64

Returns the normalized cyan color of the pixel wand

func (*PixelWand) GetCyanQuantum ¶

func (pw *PixelWand) GetCyanQuantum() Quantum

Returns the cyan color of the pixel wand

func (*PixelWand) GetGreen ¶

func (pw *PixelWand) GetGreen() float64

Returns the normalized green color of the pixel wand

func (*PixelWand) GetGreenQuantum ¶

func (pw *PixelWand) GetGreenQuantum() Quantum

Returns the green color of the pixel wand

func (*PixelWand) GetMagenta ¶

func (pw *PixelWand) GetMagenta() float64

Returns the normalized magenta color of the pixel wand

func (*PixelWand) GetMagentaQuantum ¶

func (pw *PixelWand) GetMagentaQuantum() Quantum

Returns the magenta color of the pixel wand

func (*PixelWand) GetOpacity ¶

func (pw *PixelWand) GetOpacity() float64

Returns the normalized opacity color of the pixel wand

func (*PixelWand) GetOpacityQuantum ¶

func (pw *PixelWand) GetOpacityQuantum() Quantum

Returns the opacity color of the pixel wand

func (*PixelWand) GetQuantumColor ¶

func (pw *PixelWand) GetQuantumColor() *PixelPacket

Gets the color of the pixel wand as a PixelPacket

func (*PixelWand) GetRed ¶

func (pw *PixelWand) GetRed() float64

Returns the normalized red color of the pixel wand

func (*PixelWand) GetRedQuantum ¶

func (pw *PixelWand) GetRedQuantum() Quantum

Returns the red color of the pixel wand

func (*PixelWand) GetYellow ¶

func (pw *PixelWand) GetYellow() float64

Returns the normalized yellow color of the pixel wand

func (*PixelWand) GetYellowQuantum ¶

func (pw *PixelWand) GetYellowQuantum() Quantum

Returns the yellow color of the pixel wand

func (*PixelWand) IncreaseCount ¶

func (pw *PixelWand) IncreaseCount()

Increase PixelWand ref counter and set according "can`t be terminated status"

func (*PixelWand) SetBlack ¶

func (pw *PixelWand) SetBlack(black float64)

Sets the normalized black color of the pixel wand

func (*PixelWand) SetBlackQuantum ¶

func (pw *PixelWand) SetBlackQuantum(black Quantum)

Sets the black color of the pixel wand

func (*PixelWand) SetBlue ¶

func (pw *PixelWand) SetBlue(blue float64)

Sets the normalized blue color of the pixel wand

func (*PixelWand) SetBlueQuantum ¶

func (pw *PixelWand) SetBlueQuantum(blue Quantum)

Sets the blue color of the pixel wand

func (*PixelWand) SetColor ¶

func (pw *PixelWand) SetColor(color string) bool

Sets the color of the pixel wand with a string (e.g. "blue", "#0000ff", "rgb(0,0,255)", "cmyk(100,100,100,10)", etc.)

func (*PixelWand) SetColorCount ¶

func (pw *PixelWand) SetColorCount(count uint)

Sets the color count of the pixel wand

func (*PixelWand) SetCyan ¶

func (pw *PixelWand) SetCyan(cyan float64)

Sets the normalized cyan color of the pixel wand

func (*PixelWand) SetCyanQuantum ¶

func (pw *PixelWand) SetCyanQuantum(cyan Quantum)

Sets the cyan color of the pixel wand

func (*PixelWand) SetGreen ¶

func (pw *PixelWand) SetGreen(green float64)

Sets the normalized green color of the pixel wand

func (*PixelWand) SetGreenQuantum ¶

func (pw *PixelWand) SetGreenQuantum(green Quantum)

Sets the green color of the pixel wand

func (*PixelWand) SetMagenta ¶

func (pw *PixelWand) SetMagenta(magenta float64)

Sets the normalized magenta color of the pixel wand

func (*PixelWand) SetMagentaQuantum ¶

func (pw *PixelWand) SetMagentaQuantum(magenta Quantum)

Sets the magenta color of the pixel wand

func (*PixelWand) SetOpacity ¶

func (pw *PixelWand) SetOpacity(opacity float64)

Sets the normalized opacity color of the pixel wand

func (*PixelWand) SetOpacityQuantum ¶

func (pw *PixelWand) SetOpacityQuantum(opacity Quantum)

Sets the opacity color of the pixel wand

func (*PixelWand) SetQuantumColor ¶

func (pw *PixelWand) SetQuantumColor(color *PixelPacket)

Sets the color of the pixel wand

func (*PixelWand) SetRed ¶

func (pw *PixelWand) SetRed(red float64)

Sets the normalized red color of the pixel wand

func (*PixelWand) SetRedQuantum ¶

func (pw *PixelWand) SetRedQuantum(red Quantum)

Sets the red color of the pixel wand

func (*PixelWand) SetYellow ¶

func (pw *PixelWand) SetYellow(yellow float64)

Sets the normalized yellow color of the pixel wand

func (*PixelWand) SetYellowQuantum ¶

func (pw *PixelWand) SetYellowQuantum(yellow Quantum)

Sets the yellow color of the pixel wand