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options.go
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options.go
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package bimg
/*
#cgo pkg-config: vips
#include "vips/vips.h"
*/
import "C"
const (
// Quality defines the default JPEG quality to be used.
Quality = 80
// MaxSize defines the maximum pixels width or height supported.
MaxSize = 16383
)
// Gravity represents the image gravity value.
type Gravity int
const (
// GravityCentre represents the centre value used for image gravity orientation.
GravityCentre Gravity = iota
// GravityNorth represents the north value used for image gravity orientation.
GravityNorth
// GravityEast represents the east value used for image gravity orientation.
GravityEast
// GravitySouth represents the south value used for image gravity orientation.
GravitySouth
// GravityWest represents the west value used for image gravity orientation.
GravityWest
// GravitySmart enables libvips Smart Crop algorithm for image gravity orientation.
GravitySmart
)
// Interpolator represents the image interpolation value.
type Interpolator int
const (
// Bicubic interpolation value.
Bicubic Interpolator = iota
// Bilinear interpolation value.
Bilinear
// Nohalo interpolation value.
Nohalo
// Nearest neighbour interpolation value.
Nearest
)
var interpolations = map[Interpolator]string{
Bicubic: "bicubic",
Bilinear: "bilinear",
Nohalo: "nohalo",
Nearest: "nearest",
}
func (i Interpolator) String() string {
return interpolations[i]
}
// Angle represents the image rotation angle value.
type Angle int
const (
// D0 represents the rotation angle 0 degrees.
D0 Angle = 0
// D45 represents the rotation angle 90 degrees.
D45 Angle = 45
// D90 represents the rotation angle 90 degrees.
D90 Angle = 90
// D135 represents the rotation angle 90 degrees.
D135 Angle = 135
// D180 represents the rotation angle 180 degrees.
D180 Angle = 180
// D235 represents the rotation angle 235 degrees.
D235 Angle = 235
// D270 represents the rotation angle 270 degrees.
D270 Angle = 270
// D315 represents the rotation angle 180 degrees.
D315 Angle = 315
)
// Direction represents the image direction value.
type Direction int
const (
// Horizontal represents the orizontal image direction value.
Horizontal Direction = C.VIPS_DIRECTION_HORIZONTAL
// Vertical represents the vertical image direction value.
Vertical Direction = C.VIPS_DIRECTION_VERTICAL
)
// Interpretation represents the image interpretation type.
// See: https://jcupitt.github.io/libvips/API/current/VipsImage.html#VipsInterpretation
type Interpretation int
const (
// InterpretationError points to the libvips interpretation error type.
InterpretationError Interpretation = C.VIPS_INTERPRETATION_ERROR
// InterpretationMultiband points to its libvips interpretation equivalent type.
InterpretationMultiband Interpretation = C.VIPS_INTERPRETATION_MULTIBAND
// InterpretationBW points to its libvips interpretation equivalent type.
InterpretationBW Interpretation = C.VIPS_INTERPRETATION_B_W
// InterpretationCMYK points to its libvips interpretation equivalent type.
InterpretationCMYK Interpretation = C.VIPS_INTERPRETATION_CMYK
// InterpretationRGB points to its libvips interpretation equivalent type.
InterpretationRGB Interpretation = C.VIPS_INTERPRETATION_RGB
// InterpretationSRGB points to its libvips interpretation equivalent type.
InterpretationSRGB Interpretation = C.VIPS_INTERPRETATION_sRGB
// InterpretationRGB16 points to its libvips interpretation equivalent type.
InterpretationRGB16 Interpretation = C.VIPS_INTERPRETATION_RGB16
// InterpretationGREY16 points to its libvips interpretation equivalent type.
InterpretationGREY16 Interpretation = C.VIPS_INTERPRETATION_GREY16
// InterpretationScRGB points to its libvips interpretation equivalent type.
InterpretationScRGB Interpretation = C.VIPS_INTERPRETATION_scRGB
// InterpretationLAB points to its libvips interpretation equivalent type.
InterpretationLAB Interpretation = C.VIPS_INTERPRETATION_LAB
// InterpretationXYZ points to its libvips interpretation equivalent type.
InterpretationXYZ Interpretation = C.VIPS_INTERPRETATION_XYZ
)
// Extend represents the image extend mode, used when the edges
// of an image are extended, you can specify how you want the extension done.
// See: https://jcupitt.github.io/libvips/API/current/libvips-conversion.html#VIPS-EXTEND-BACKGROUND:CAPS
type Extend int
const (
// ExtendBlack extend with black (all 0) pixels mode.
ExtendBlack Extend = C.VIPS_EXTEND_BLACK
// ExtendCopy copy the image edges.
ExtendCopy Extend = C.VIPS_EXTEND_COPY
// ExtendRepeat repeat the whole image.
ExtendRepeat Extend = C.VIPS_EXTEND_REPEAT
// ExtendMirror mirror the whole image.
ExtendMirror Extend = C.VIPS_EXTEND_MIRROR
// ExtendWhite extend with white (all bits set) pixels.
ExtendWhite Extend = C.VIPS_EXTEND_WHITE
// ExtendBackground with colour from the background property.
ExtendBackground Extend = C.VIPS_EXTEND_BACKGROUND
// ExtendLast extend with last pixel.
ExtendLast Extend = C.VIPS_EXTEND_LAST
)
// WatermarkFont defines the default watermark font to be used.
var WatermarkFont = "sans 10"
// Color represents a traditional RGB color scheme.
type Color struct {
R, G, B uint8
}
// ColorBlack is a shortcut to black RGB color representation.
var ColorBlack = Color{0, 0, 0}
// Watermark represents the text-based watermark supported options.
type Watermark struct {
Width int
DPI int
Margin int
Opacity float32
NoReplicate bool
Text string
Font string
Background Color
}
// WatermarkImage represents the image-based watermark supported options.
type WatermarkImage struct {
Left int
Top int
Buf []byte
Opacity float32
}
// GaussianBlur represents the gaussian image transformation values.
type GaussianBlur struct {
Sigma float64
MinAmpl float64
}
// Sharpen represents the image sharp transformation options.
type Sharpen struct {
Radius int
X1 float64
Y2 float64
Y3 float64
M1 float64
M2 float64
}
// Options represents the supported image transformation options.
type Options struct {
Height int
Width int
AreaHeight int
AreaWidth int
Top int
Left int
Quality int
Compression int
Zoom int
Crop bool
SmartCrop bool // Deprecated, use: bimg.Options.Gravity = bimg.GravitySmart
Enlarge bool
Embed bool
Flip bool
Flop bool
Force bool
NoAutoRotate bool
NoProfile bool
Interlace bool
StripMetadata bool
Trim bool
Lossless bool
Extend Extend
Rotate Angle
Background Color
Gravity Gravity
Watermark Watermark
WatermarkImage WatermarkImage
Type ImageType
Interpolator Interpolator
Interpretation Interpretation
GaussianBlur GaussianBlur
Sharpen Sharpen
Threshold float64
OutputICC string
}