Namespace: go.std.image.draw

v1.0

Contents

• Summary
• Index
• Constants
• Variables
• Functions, Macros, and Special Forms
• Types

Summary

Provides a low-level interface to the image/draw package.

Package draw provides image composition functions.

See "The Go image/draw package" for an introduction to this package:
https://golang.org/doc/articles/image_draw.html

Index

• *Op
• Draw
• DrawMask
• Drawer
• FloydSteinberg
• Image
• Op
• Over
• Quantizer
• RGBA64Image
• Src
• arrayOfDrawer
• arrayOfImage
• arrayOfOp
• arrayOfQuantizer
• arrayOfRGBA64Image

Legend

Constant Variable Function Macro Special form Type GoVar Receiver/Method

Constants

Constants are variables with :const true in their metadata. Joker currently does not recognize them as special; as such, it allows redefining them or their values.

(None.)

Variables

• FloydSteinberg

  Var v1.0

  FloydSteinberg is a Drawer that is the Src Op with Floyd-Steinberg error
  diffusion.
  

• Over

  GoObject v1.0

  Over specifies ``(src in mask) over dst''.
  

• Src

  GoObject v1.0

  Src specifies ``src in mask''.
  

Functions, Macros, and Special Forms

• Draw

  Function v1.0

  (Draw dst r src sp op)
  

  Draw calls DrawMask with a nil mask.
  
  Go input arguments: (dst Image, r image.Rectangle, src image.Image, sp image.Point, op Op)
  
  Joker input arguments: [^Image dst, ^go.std.image/Rectangle r, ^go.std.image/Image src, ^go.std.image/Point sp, ^Op op]

• DrawMask

  Function v1.0

  (DrawMask dst r src sp mask mp op)
  

  DrawMask aligns r.Min in dst with sp in src and mp in mask and then replaces the rectangle r
  in dst with the result of a Porter-Duff composition. A nil mask is treated as opaque.
  
  Go input arguments: (dst Image, r image.Rectangle, src image.Image, sp image.Point, mask image.Image, mp image.Point, op Op)
  
  Joker input arguments: [^Image dst, ^go.std.image/Rectangle r, ^go.std.image/Image src, ^go.std.image/Point sp, ^go.std.image/Image mask, ^go.std.image/Point mp, ^Op op]

Types

• *Op

  Concrete Type v1.0

  Op is a Porter-Duff compositing operator.
  

• Drawer

  Abstract Type v1.0

  Drawer contains the Draw method.
  

• Draw

  Method for Drawer v1.0

  ([dst r src sp])
  

• Image

  Abstract Type v1.0

  Image is an image.Image with a Set method to change a single pixel.
  

• At

  Method for Image v1.0

  ([x y])
  

• Bounds

  Method for Image v1.0

  ([])
  

• ColorModel

  Method for Image v1.0

  ([])
  

• Set

  Method for Image v1.0

  ([x y c])
  

• Op

  Concrete Type v1.0

  Op is a Porter-Duff compositing operator.
  

• Draw

  Receiver for Op v1.0

  ([dst r src sp])
  

  Draw implements the Drawer interface by calling the Draw function with this
  Op.
  

• Quantizer

  Abstract Type v1.0

  Quantizer produces a palette for an image.
  

• Quantize

  Method for Quantizer v1.0

  ([p m])
  

• RGBA64Image

  Abstract Type v1.0

  RGBA64Image extends both the Image and image.RGBA64Image interfaces with a
  SetRGBA64 method to change a single pixel. SetRGBA64 is equivalent to
  calling Set, but it can avoid allocations from converting concrete color
  types to the color.Color interface type.
  

• At

  Method for RGBA64Image v1.0

  ([x y])
  

• Bounds

  Method for RGBA64Image v1.0

  ([])
  

• ColorModel

  Method for RGBA64Image v1.0

  ([])
  

• RGBA64At

  Method for RGBA64Image v1.0

  ([x y])
  

• Set

  Method for RGBA64Image v1.0

  ([x y c])
  

• SetRGBA64

  Method for RGBA64Image v1.0

  ([x y c])
  

• arrayOfDrawer

  Concrete Type v1.0

  Drawer contains the Draw method.
  

• arrayOfImage

  Concrete Type v1.0

  Image is an image.Image with a Set method to change a single pixel.
  

• arrayOfOp

  Concrete Type v1.0

  Op is a Porter-Duff compositing operator.
  

• arrayOfQuantizer

  Concrete Type v1.0

  Quantizer produces a palette for an image.
  

• arrayOfRGBA64Image

  Concrete Type v1.0

  RGBA64Image extends both the Image and image.RGBA64Image interfaces with a
  SetRGBA64 method to change a single pixel. SetRGBA64 is equivalent to
  calling Set, but it can avoid allocations from converting concrete color
  types to the color.Color interface type.