Functions — github.com/tdewolff/canvas

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Functions1,447 in github.com/tdewolff/canvas

⨍ Functions 1,447◇ Types & classes 214

↓ 293 callersMethodT

T returns the matrix transpose.

↓ 206 callersFunctionEqual

Equal returns true if a and b are equal within an absolute tolerance of Epsilon or within a relative tolerance of Epsilon (relative to the largest of

↓ 183 callersFunctionMustParseSVGPath

MustParseSVGPath parses an SVG path data string and panics if it fails.

↓ 153 callersMethodDrawPath

DrawPath draws a path at position (x,y) using the current draw state.

↓ 137 callersMethodSub

Sub subtracts Q from P.

↓ 128 callersMethodAdd

Add returns a rect that encompasses both the current rect and the given rect.

↓ 122 callersMethodLineTo

LineTo adds a linear path to (x,y).

↓ 101 callersMethodMul

Mul multiplies x and y by f.

↓ 101 callersFunctioncmdLen

cmdLen returns the number of values (float64s) the path command contains.

↓ 85 callersMethodDot

Dot returns the dot product between OP and OQ, i.e. zero if perpendicular and |OP|*|OQ| if aligned.

↓ 84 callersFunctionboSP

(a, b Point, clipping bool)

path_intersection_test.go:500

↓ 80 callersMethodRun

cmd/pdftext/main.go:47

↓ 77 callersMethodTranslate

Translate applies a translational transform to the context.

renderers/gonumplot.go:86

↓ 73 callersMethodWrite

Write writes the canvas to an io.Writer using the given writer. See renderers/ for an overview of implementations of canvas.Writer.

↓ 68 callersMethodMoveTo

MoveTo moves the path to (x,y) without connecting the path. It starts a new independent subpath. Multiple subpaths can be useful when negating parts

↓ 61 callersFunctionBox

Box returns a box item (a word) of the given fixed width.

text/linebreak.go:164

↓ 60 callersFunctionRectangle

Rectangle returns a rectangle of width w and height h.

↓ 51 callersMethodSetFillColor

SetFillColor sets the current fill color.

renderers/gochart.go:82

↓ 51 callersMethodTranslate

Translate translates the path by (x,y). It modifies the path in-place.

↓ 50 callersMethodDrawText

DrawText draws text at position (x,y) using the current draw state.

↓ 50 callersMethodSetFillColor

SetFillColor sets the color to be used for filling operations. The default fill color is black.

↓ 50 callersMethodSplit

Split splits the path into its independent subpaths. The path is split before each MoveTo command.

↓ 48 callersFunctionCircle

Circle returns a circle of radius r.

↓ 48 callersMethodClose

Close closes a (sub)path with a LineTo to the start of the path (the most recent MoveTo command). It also signals the path closes as opposed to being

↓ 46 callersMethodSetStrokeColor

SetStrokeColor sets the current stroke color.

renderers/gochart.go:77

↓ 43 callersFunctionNewTextLine

NewTextLine is a simple text line using a single font face, a string (supporting new lines) and horizontal alignment (Left, Center, Right). The text's

↓ 43 callersMethodScale

Scale scales the path by (sx,sy). It modifies the path in-place.

↓ 41 callersMethodparseDimension

(v string, parent float64)

↓ 40 callersMethodAppend

Append appends path q to p and returns the extended path p.

↓ 39 callersMethodFace

Face gets the font face given by the font size in points and its style. Fill can be any of Paint, color.Color, or canvas.Pattern.

↓ 38 callersMethodEquals

Equals returns true if p and q are equal within tolerance Epsilon.

↓ 36 callersMethodFace

Face gets the font face given by the font size in points. Other arguments that can be passed: Paint/Pattern/color.Color (=Black), FontStyle (=FontRegu

↓ 36 callersFunctionHex

Hex parses a CSS hexadecimal color such as e.g. #ff0000 or F00.

↓ 36 callersFunctionNewFontFamily

NewFontFamily returns a new font family.

↓ 36 callersMethodRotate

Rotate rotates the path by deg degrees. It modifies the path in-place.

↓ 36 callersMethodTransform

↓ 34 callersMethodEnd

End returns the current path segment end position.

path_scanner.go:78

↓ 34 callersMethodwrite

(s string, v ...interface{})

renderers/pdf/writer.go:140

↓ 33 callersMethodBounds

renderers/rasterizer/util.go:50

↓ 33 callersFunctionNew

New returns a new canvas with width and height in millimeters, that records all drawing operations into layers. The canvas can then be rendered to any

↓ 33 callersFunctionangleNorm

angleNorm returns the angle theta in the range [0,2PI).

↓ 32 callersMethodAngle

Angle returns the angle in radians [0,2PI) between the x-axis and OP.

↓ 32 callersFunctionDPMM

DPMM (dots-per-millimeter) for the resolution of rasterization.

↓ 32 callersMethodJoin

(*Path, *Path, float64, Point, Point, Point, float64, float64)

path_stroke.go:78

↓ 32 callersFunctionNewContext

NewContext returns a new context which is a wrapper around a renderer. Contexts maintain the state of the current path, path style, and view transform

↓ 32 callersMethodPerpDot

PerpDot returns the perp dot product between OP and OQ, i.e. zero if aligned and |OP|*|OQ| if perpendicular. This is the cross product in two dimensio

↓ 31 callersMethodSize

↓ 30 callersMethodLength

Length returns the length of the path in millimeters. The length is approximated for cubic Béziers.

↓ 30 callersMethodRGBA

color/color.go:17

↓ 30 callersFunctionsnap

snap "gridsnaps" the floating point to a grid of the given spacing

↓ 29 callersMethodArcTo

ArcTo adds an arc with radii rx and ry, with rot the counter clockwise rotation with respect to the coordinate system in degrees, large and sweep bool

↓ 28 callersMethodAt

(float64, float64)

↓ 28 callersMethodString

↓ 28 callersFunctionmoveWhiteSpace

(b []byte, i int)

cmd/pdftext/util.go:28

↓ 27 callersFunctionInterval

Interval returns true if f is in closed interval [lower-Epsilon,upper+Epsilon] where lower and upper can be interchanged.

↓ 27 callersMethodWriteFace

WriteFace writes a string with a given font face.

↓ 27 callersFunctionenosys

examples/html-canvas/wasm_exec.js:8

↓ 26 callersMethodEmpty

Empty returns true if p is an empty path or consists of only MoveTos and Closes.

↓ 26 callersMethodFills

↓ 25 callersMethodNext

path_intersection.go:555

↓ 25 callersFunctiontoArcFlags

toArcFlags converts to the largeArc and sweep boolean flags given its value in the path.

↓ 24 callersMethodHasStroke

HasStroke returns true if the style has a stroke

↓ 24 callersMethodInterpolate

Interpolate returns a point on PQ that is linearly interpolated by t in [0,1], i.e. t=0 returns P and t=1 returns Q.

↓ 24 callersMethodSetStrokeWidth

SetStrokeWidth sets the stroke width.

renderers/gochart.go:87

↓ 23 callersMethodEncode

cmd/pdftext/encoding.go:18

↓ 23 callersMethodNorm

Norm normalises OP to be of given length.

↓ 23 callersFunctionellipseToCenter

ellipseToCenter converts to the center arc format and returns (centerX, centerY, angleFrom, angleTo) with angles in radians. When angleFrom with range

path_util.go:65

↓ 22 callersMethodDPMM

DPMM returns the resolution in dots-per-millimeter.

↓ 22 callersMethodMetrics

Metrics returns the font metrics. See https://developer.apple.com/library/archive/documentation/TextFonts/Conceptual/CocoaTextArchitecture/Art/glyph_m

↓ 22 callersMethodadd

(pos Point, ta, tb, dira, dirb float64, tangent, same bool)

path_intersection_util.go:147

↓ 21 callersMethodBytes

cmd/pdftext/encoding.go:108

↓ 21 callersMethodLoadSystemFont

LoadSystemFont loads a font from the system's fonts.

↓ 21 callersMethodSet

(x, y int, c color.Color)

image/image.go:233

↓ 21 callersMethodToText

ToText takes the added text spans and fits them within a given box of certain width and height using Donald Knuth's line breaking algorithm.

↓ 20 callersMethodAdd

Add adds a new point to the polyline.

↓ 20 callersMethodEqual

Equal returns true if Paints are equal.

↓ 20 callersMethodH

H returns the height of the rectangle.

↓ 20 callersMethodSetStrokeColor

SetStrokeColor sets the color to be used for stroking operations. The default stroke color is transparent.

↓ 20 callersMethodStart

Start returns the current path segment start position.

path_scanner.go:41

↓ 19 callersMethodAdd

Add adds Q to P.

↓ 19 callersMethodHasFill

HasFill returns true if the style has a fill

↓ 19 callersMethodRenderPath

(path *Path, style Style, m Matrix)

↓ 19 callersMethodW

W returns the width of the rectangle.

↓ 19 callersMethodWriteFile

WriteFile writes the canvas to a file using the given writer. See renderers/ for an overview of implementations of canvas.Writer.

↓ 19 callersFunctionsolveQuadraticFormula

Numerically stable quadratic formula, lowest root is returned first, see https://math.stackexchange.com/a/2007723

↓ 18 callersMethodGet

(string, float64)

latex_dvi.go:31

↓ 17 callersMethodNot

Not returns the boolean path operation of path p NOT q, i.e. the difference of both. It removes all self-intersections and overlapping areas, orients

path_intersection.go:198

↓ 17 callersMethodRenderTo

(Renderer, *Path)

↓ 17 callersMethodReverse

Reverse returns a new path that is the same path as p but in the reverse direction.

↓ 17 callersMethodScan

Scan scans a new path segment and should be called before the other methods.

path_scanner.go:22

↓ 17 callersMethodStyle

Style returns the style of the font.

↓ 17 callersFunctioncubicBezierSplit

(p0, p1, p2, p3 Point, t float64)

path_util.go:662

↓ 17 callersFunctiondraw

(ctx *canvas.Context, y float64, title string, p, q *canvas.Path)

resources/docs/boolean/main.go:94

↓ 16 callersMethodLoadFontFile

LoadFontFile loads a font from a file.

↓ 16 callersMethodOverlaps

Overlaps returns true if both rectangles overlap.

↓ 16 callersFunctionbentleyOttmann

(ps, qs Paths, op pathOp, fillRule FillRule)

path_intersection.go:1788

↓ 15 callersMethodCopy

Copy returns a copy of p.

↓ 15 callersMethodCubeTo

CubeTo adds a cubic Bézier path with control points (cpx1,cpy1) and (cpx2,cpy2) and end point (x,y).

↓ 15 callersFunctionEllipsePos

EllipsePos returns the position on the ellipse at angle theta.

↓ 15 callersFunctionGlue

Glue returns a glue item (a space) where width is the default width, stretch*Tolerance the maximum width, and shrink*Tolerance the minimum width.

text/linebreak.go:172

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