filters

Documentation

Index

• Constants
• func FinalizeResponse(ctx filters.FilterContext)
• func HandleImageResponse(ctx filters.FilterContext, f ImageFilter) error
• func NewAddBackground() filters.Spec
• func NewBlur() filters.Spec
• func NewConvertImageType() filters.Spec
• func NewCrop() filters.Spec
• func NewCropByHeight() filters.Spec
• func NewCropByWidth() filters.Spec
• func NewFinalizeResponse() filters.Spec
• func NewLongerEdgeResize() filters.Spec
• func NewOverlayImage() filters.Spec
• func NewQuality() filters.Spec
• func NewResize() filters.Spec
• func NewResizeByHeight() filters.Spec
• func NewResizeByWidth() filters.Spec
• func NewSharpen() filters.Spec
• func NewTransformFromQueryParams() filters.Spec
• type ImageFilter
• type ImageFilterContext

Constants

const (
	// North Gravity
	North = "north"
	// South Gravity
	South = "south"
	// East Gravity
	East = "east"
	// West Gravity
	West = "west"
	// Center Gravity
	Center = "center"
	// Quality used by default if not specified
	Quality = 100
)

const (
	// OverlayImageName is the name of the filter
	OverlayImageName = "overlayImage"
	// NE North East
	NE = "NE"
	// NC North Center
	NC = "NC"
	// NW North West
	NW = "NW"
	// CE Centre East
	CE = "CE"
	// CC Centre Center
	CC = "CC"
	// CW Centre West
	CW = "CW"
	// SE South East
	SE = "SE"
	// SC South Center
	SC = "SC"
	// SW South West
	SW = "SW"
)

const (
	// AddBackgroundName is the name of the filter
	AddBackgroundName = "addBackground"
)

const BlurName = "blur"

BlurName is the name of the filter

const ConvertImageType = "convertImageType"

ConvertImageType is the name of the filter

const CropByHeightName = "cropByHeight"

CropByHeightName is the name of the filter

const CropByWidthName = "cropByWidth"

CropByWidthName is the name of the filter

const CropName = "crop"

CropName is the name of the filter

const (
	ExtractArea = "transformFromQueryParams"
)

const FinalizeResponseName = "finalizeResponse"

FinalizeResponseName is the name of the filter

const LongerEdgeResizeName = "longerEdgeResize"

LongerEdgeResizeName is the name of the filter

const QualityName = "quality"

QualityName is the name of the filter

const ResizeByHeightName = "height"

ResizeByHeightName is the name of the filter

const ResizeByWidthName = "width"

ResizeByWidthName is the name of the filter

const (
	// ResizeName is the name of the filter
	ResizeName = "resize"
)

const SharpenName = "sharpen"

SharpenName is the name of the filter

Functions

func FinalizeResponse

func FinalizeResponse(ctx filters.FilterContext)

FinalizeResponse is called at the end of the transformations on an image to empty the queue of operations to perform

func HandleImageResponse

func HandleImageResponse(ctx filters.FilterContext, f ImageFilter) error

HandleImageResponse should be called by the Response of every filter. It transforms the image

func NewAddBackground

func NewAddBackground() filters.Spec

NewAddBackground creates a new add backgroud filter

func NewBlur

func NewBlur() filters.Spec

NewBlur creates a new filter of this type

func NewConvertImageType

func NewConvertImageType() filters.Spec

NewConvertImageType creates a new filter of this type

func NewCrop

func NewCrop() filters.Spec

NewCrop creates a new filter of this type

func NewCropByHeight

func NewCropByHeight() filters.Spec

NewCropByHeight creates a new filter of this type

func NewCropByWidth

func NewCropByWidth() filters.Spec

NewCropByWidth creates a new filter of this type

func NewFinalizeResponse

func NewFinalizeResponse() filters.Spec

NewFinalizeResponse creates a new filter of this type

func NewLongerEdgeResize

func NewLongerEdgeResize() filters.Spec

NewLongerEdgeResize creates a new filter of this type

func NewOverlayImage

func NewOverlayImage() filters.Spec

NewOverlayImage creates a new filter of this type

func NewQuality

func NewQuality() filters.Spec

NewQuality creates a new filter of this type

func NewResize

func NewResize() filters.Spec

NewResize creates a new filter of this type

func NewResizeByHeight

func NewResizeByHeight() filters.Spec

NewResizeByHeight creates a new filter of this type

func NewResizeByWidth

func NewResizeByWidth() filters.Spec

NewResizeByWidth creates a new filter of this type

func NewSharpen

func NewSharpen() filters.Spec

NewSharpen creates a new filter of this type

func NewTransformFromQueryParams

func NewTransformFromQueryParams() filters.Spec

Types

type ImageFilter

type ImageFilter interface {
	CreateOptions(imageContext *ImageFilterContext) (*bimg.Options, error)
	CanBeMerged(other *bimg.Options, self *bimg.Options) bool
	Merge(other *bimg.Options, self *bimg.Options) *bimg.Options
}

ImageFilter defines what a filter should implement

type ImageFilterContext

type ImageFilterContext struct {
	Image      *bimg.Image
	Parameters map[string][]string
}