Enums

Details

class Vips.Access(value)

Bases: GObject.GEnum

The type of access an operation has to supply. See vips_tilecache() and Vips.Foreign.

Vips.Access.RANDOM means requests can come in any order.

Vips.Access.SEQUENTIAL means requests will be top-to-bottom, but with some amount of buffering behind the read point for small non-local accesses.

RANDOM = 0

can read anywhere

SEQUENTIAL = 1

top-to-bottom reading only, but with a small buffer

SEQUENTIAL_UNBUFFERED = 2
LAST = 3
class Vips.Align(value)

Bases: GObject.GEnum

See vips_join() and so on.

Operations like vips_join() need to be told whether to align images on the low or high coordinate edge, or centre.

See also: vips_join().

LOW = 0

align low coordinate edge

CENTRE = 1

align centre

HIGH = 2

align high coordinate edge

LAST = 3
class Vips.Angle(value)

Bases: GObject.GEnum

See vips_rot() and so on.

Fixed rotate angles.

See also: vips_rot().

D0 = 0

no rotate

D90 = 1

90 degrees clockwise

D180 = 2

180 degree rotate

D270 = 3

90 degrees anti-clockwise

LAST = 4
class Vips.Angle45(value)

Bases: GObject.GEnum

See vips_rot45() and so on.

Fixed rotate angles.

See also: vips_rot45().

D0 = 0

no rotate

D45 = 1

45 degrees clockwise

D90 = 2

90 degrees clockwise

D135 = 3

135 degrees clockwise

D180 = 4

180 degrees

D225 = 5

135 degrees anti-clockwise

D270 = 6

90 degrees anti-clockwise

D315 = 7

45 degrees anti-clockwise

LAST = 8
class Vips.BandFormat(value)

Bases: GObject.GEnum

The format used for each band element.

Each corresponds to a native C type for the current machine. For example, Vips.BandFormat.USHORT is unsigned short.

classmethod is8bit(format)
Parameters:format (Vips.BandFormat) – format to test
Return type:bool

Return True if format is uchar or schar.

classmethod iscomplex(format)
Parameters:format (Vips.BandFormat) – format to test
Return type:bool

Return True if fmt is one of the complex types.

classmethod isfloat(format)
Parameters:format (Vips.BandFormat) – format to test
Return type:bool

Return True if format is one of the float types.

classmethod isint(format)
Parameters:format (Vips.BandFormat) – format to test
Return type:bool

Return True if format is one of the integer types.

classmethod isuint(format)
Parameters:format (Vips.BandFormat) – format to test
Return type:bool

Return True if format is one of the unsigned integer types.

NOTSET = -1

invalid setting

UCHAR = 0

unsigned str format

CHAR = 1

str format

LAST = 10
USHORT = 2

unsigned short format

SHORT = 3

short format

UINT = 4

unsigned int format

INT = 5

int format

FLOAT = 6

float format

COMPLEX = 7

complex (two floats) format

DOUBLE = 8

double float format

DPCOMPLEX = 9

double complex (two double) format

class Vips.BlendMode(value)

Bases: GObject.GEnum

The various Porter-Duff and PDF blend modes. See vips_composite(), for example.

The Cairo docs have a nice explanation of all the blend modes:

https://www.cairographics.org/operators

The non-separable modes are not implemented.

CLEAR = 0

where the second object is drawn, the first is removed

SOURCE = 1

the second object is drawn as if nothing were below

DEST_ATOP = 10

like ATOP, but swaps the arguments

XOR = 11

something like a difference operator

ADD = 12

a bit like adding the two images

SATURATE = 13

a bit like the darker of the two

MULTIPLY = 14

at least as dark as the darker of the two inputs

SCREEN = 15

at least as light as the lighter of the inputs

OVERLAY = 16

multiplies or screens colors, depending on the lightness

DARKEN = 17

the darker of each component

LIGHTEN = 18

the lighter of each component

COLOUR_DODGE = 19

brighten first by a factor second

OVER = 2

the image shows what you would expect if you held two semi-transparent slides on top of each other

COLOUR_BURN = 20

darken first by a factor of second

HARD_LIGHT = 21

multiply or screen, depending on lightness

SOFT_LIGHT = 22

darken or lighten, depending on lightness

DIFFERENCE = 23

difference of the two

EXCLUSION = 24

somewhat like DIFFERENCE, but lower-contrast

LAST = 25
IN = 3

the first object is removed completely, the second is only drawn where the first was

OUT = 4

the second is drawn only where the first isn’t

ATOP = 5

this leaves the first object mostly intact, but mixes both objects in the overlapping area

DEST = 6

leaves the first object untouched, the second is discarded completely

DEST_OVER = 7

like OVER, but swaps the arguments

DEST_IN = 8

like IN, but swaps the arguments

DEST_OUT = 9

like OUT, but swaps the arguments

class Vips.Coding(value)

Bases: GObject.GEnum

How pixels are coded.

Normally, pixels are uncoded and can be manipulated as you would expect. However some file formats code pixels for compression, and sometimes it’s useful to be able to manipulate images in the coded format.

The gaps in the numbering are historical and must be maintained. Allocate new numbers from the end.

ERROR = -1
NONE = 0

pixels are not coded

LABQ = 2

pixels encode 3 float CIELAB values as 4 uchar

RAD = 6

pixels encode 3 float RGB as 4 uchar (Radiance coding)

LAST = 7
class Vips.Combine(value)

Bases: GObject.GEnum

How to combine values. See vips_compass(), for example.

MAX = 0

take the maximum of the possible values

SUM = 1

sum all the values

MIN = 2

take the minimum value

LAST = 3
class Vips.CombineMode(value)

Bases: GObject.GEnum

See vips_draw_image() and so on.

Operations like vips_draw_image() need to be told how to combine images from two sources.

See also: vips_join().

SET = 0

set pixels to the new value

ADD = 1

add pixels

LAST = 2
class Vips.CompassDirection(value)

Bases: GObject.GEnum

A direction on a compass. Used for vips_gravity(), for example.

CENTRE = 0

centre

NORTH = 1

north

EAST = 2

east

SOUTH = 3

south

WEST = 4

west

NORTH_EAST = 5

north-east

SOUTH_EAST = 6

south-east

SOUTH_WEST = 7

south-west

NORTH_WEST = 8

north-west

LAST = 9
class Vips.DemandStyle(value)

Bases: GObject.GEnum

See vips_image_pipelinev(). Operations can hint to the VIPS image IO system about the kind of demand geometry they prefer.

These demand styles are given below in order of increasing restrictiveness. When demanding output from a pipeline, vips_image_generate() will use the most restrictive of the styles requested by the operations in the pipeline.

Vips.DemandStyle.THINSTRIP — This operation would like to output strips the width of the image and a few pels high. This is option suitable for point-to-point operations, such as those in the arithmetic package.

This option is only efficient for cases where each output pel depends upon the pel in the corresponding position in the input image.

Vips.DemandStyle.FATSTRIP — This operation would like to output strips the width of the image and as high as possible. This option is suitable for area operations which do not violently transform coordinates, such as vips_conv().

Vips.DemandStyle.SMALLTILE — This is the most general demand format. Output is demanded in small (around 100x100 pel) sections. This style works reasonably efficiently, even for bizzare operations like 45 degree rotate.

Vips.DemandStyle.ANY — This image is not being demand-read from a disc file (even indirectly) so any demand style is OK. It’s used for things like vips_black() where the pixels are calculated.

See also: vips_image_pipelinev().

ERROR = -1
SMALLTILE = 0

demand in small (typically 64x64 pixel) tiles

FATSTRIP = 1

demand in fat (typically 10 pixel high) strips

THINSTRIP = 2

demand in thin (typically 1 pixel high) strips

ANY = 3

demand geometry does not matter

class Vips.Direction(value)

Bases: GObject.GEnum

See vips_flip(), vips_join() and so on.

Operations like vips_flip() need to be told whether to flip left-right or top-bottom.

See also: vips_flip(), vips_join().

HORIZONTAL = 0

left-right

VERTICAL = 1

top-bottom

LAST = 2
class Vips.Extend(value)

Bases: GObject.GEnum

See vips_embed(), vips_conv(), vips_affine() and so on.

When the edges of an image are extended, you can specify how you want the extension done.

Vips.Extend.BLACK — new pixels are black, ie. all bits are zero.

Vips.Extend.COPY — each new pixel takes the value of the nearest edge pixel

Vips.Extend.REPEAT — the image is tiled to fill the new area

Vips.Extend.MIRROR — the image is reflected and tiled to reduce hash edges

Vips.Extend.WHITE — new pixels are white, ie. all bits are set

Vips.Extend.BACKGROUND — colour set from the background property

We have to specify the exact value of each enum member since we have to keep these frozen for back compat with vips7.

See also: vips_embed().

BLACK = 0

extend with black (all 0) pixels

COPY = 1

copy the image edges

REPEAT = 2

repeat the whole image

MIRROR = 3

mirror the whole image

WHITE = 4

extend with white (all bits set) pixels

BACKGROUND = 5

extend with colour from the background property

LAST = 6
class Vips.ForeignDzContainer(value)

Bases: GObject.GEnum

How many pyramid layers to create.

FS = 0

write tiles to the filesystem

ZIP = 1

write tiles to a zip file

SZI = 2

write to a szi file

LAST = 3
class Vips.ForeignDzDepth(value)

Bases: GObject.GEnum

How many pyramid layers to create.

ONEPIXEL = 0

create layers down to 1x1 pixel

ONETILE = 1

create layers down to 1x1 tile

ONE = 2

only create a single layer

LAST = 3
class Vips.ForeignDzLayout(value)

Bases: GObject.GEnum

What directory layout and metadata standard to use.

DZ = 0

use DeepZoom directory layout

ZOOMIFY = 1

use Zoomify directory layout

GOOGLE = 2

use Google maps directory layout

IIIF = 3

use IIIF directory layout

LAST = 4
class Vips.ForeignHeifCompression(value)

Bases: GObject.GEnum

The compression format to use inside a HEIF container.

This is assumed to use the same numbering as %heif_compression_format.

HEVC = 1

x265

AVC = 2

x264

JPEG = 3

jpeg

AV1 = 4

aom

LAST = 5
class Vips.ForeignJpegSubsample(value)

Bases: GObject.GEnum

Set jpeg subsampling mode.

AUTO = 0

default preset

ON = 1

always perform subsampling

OFF = 2

never perform subsampling

LAST = 3
class Vips.ForeignTiffCompression(value)

Bases: GObject.GEnum

The compression types supported by the tiff writer.

Use Q to set the jpeg compression level, default 75.

Use predictor to set the lzw or deflate prediction, default horizontal.

Use lossless to set WEBP lossless compression.

Use level to set webp and zstd compression level.

NONE = 0

no compression

JPEG = 1

jpeg compression

DEFLATE = 2

deflate (zip) compression

PACKBITS = 3

packbits compression

CCITTFAX4 = 4

fax4 compression

LZW = 5

LZW compression

WEBP = 6

WEBP compression

ZSTD = 7

ZSTD compression

LAST = 8
class Vips.ForeignTiffPredictor(value)

Bases: GObject.GEnum

NONE = 1
HORIZONTAL = 2
FLOAT = 3
LAST = 4
class Vips.ForeignTiffResunit(value)

Bases: GObject.GEnum

Use inches or centimeters as the resolution unit for a tiff file.

CM = 0

use centimeters

INCH = 1

use inches

LAST = 2
class Vips.ForeignWebpPreset(value)

Bases: GObject.GEnum

Tune lossy encoder settings for different image types.

DEFAULT = 0

default preset

PICTURE = 1

digital picture, like portrait, inner shot

PHOTO = 2

outdoor photograph, with natural lighting

DRAWING = 3

hand or line drawing, with high-contrast details

ICON = 4

small-sized colorful images

TEXT = 5

text-like

LAST = 6
class Vips.ImageType(value)

Bases: GObject.GEnum

ERROR = -1
NONE = 0
SETBUF = 1
SETBUF_FOREIGN = 2
OPENIN = 3
MMAPIN = 4
MMAPINRW = 5
OPENOUT = 6
PARTIAL = 7
class Vips.Intent(value)

Bases: GObject.GEnum

The rendering intent. Vips.Intent.ABSOLUTE is best for scientific work, Vips.Intent.RELATIVE is usually best for accurate communication with other imaging libraries.

PERCEPTUAL = 0

perceptual rendering intent

RELATIVE = 1

relative colorimetric rendering intent

SATURATION = 2

saturation rendering intent

ABSOLUTE = 3

absolute colorimetric rendering intent

LAST = 4
class Vips.Interesting(value)

Bases: GObject.GEnum

Pick the algorithm vips uses to decide image “interestingness”. This is used by vips_smartcrop(), for example, to decide what parts of the image to keep.

Vips.Interesting.NONE and Vips.Interesting.LOW mean the same – the crop is positioned at the top or left. Vips.Interesting.HIGH positions at the bottom or right.

See also: vips_smartcrop().

NONE = 0

do nothing

CENTRE = 1

just take the centre

ENTROPY = 2

use an entropy measure

ATTENTION = 3

look for features likely to draw human attention

LOW = 4

position the crop towards the low coordinate

HIGH = 5

position the crop towards the high coordinate

ALL = 6

everything is interesting

LAST = 7
class Vips.Interpretation(value)

Bases: GObject.GEnum

How the values in an image should be interpreted. For example, a three-band float image of type Vips.Interpretation.LAB should have its pixels interpreted as coordinates in CIE Lab space.

RGB and sRGB are treated in the same way. Use the colourspace functions if you want some other behaviour.

The gaps in numbering are historical and must be maintained. Allocate new numbers from the end.

ERROR = -1
MULTIBAND = 0

generic many-band image

B_W = 1

some kind of single-band image

HISTOGRAM = 10

a 1D image, eg. histogram or lookup table

XYZ = 12

the first three bands are CIE XYZ

LAB = 13

pixels are in CIE Lab space

CMYK = 15

the first four bands are in CMYK space

LABQ = 16

implies Vips.Coding.LABQ

RGB = 17

generic RGB space

CMC = 18

a uniform colourspace based on CMC(1:1)

LCH = 19

pixels are in CIE LCh space

LABS = 21

CIE LAB coded as three signed 16-bit values

SRGB = 22

pixels are sRGB

YXY = 23

pixels are CIE Yxy

FOURIER = 24

image is in fourier space

RGB16 = 25

generic 16-bit RGB

GREY16 = 26

generic 16-bit mono

MATRIX = 27

a matrix

SCRGB = 28

pixels are scRGB

HSV = 29

pixels are HSV

LAST = 30
class Vips.Kernel(value)

Bases: GObject.GEnum

The resampling kernels vips supports. See vips_reduce(), for example.

NEAREST = 0

The nearest pixel to the point.

LINEAR = 1

Convolve with a triangle filter.

CUBIC = 2

Convolve with a cubic filter.

MITCHELL = 3
LANCZOS2 = 4

Convolve with a two-lobe Lanczos kernel.

LANCZOS3 = 5

Convolve with a three-lobe Lanczos kernel.

LAST = 6
class Vips.OperationBoolean(value)

Bases: GObject.GEnum

See also: vips_boolean().

AND = 0

&

OR = 1

EOR = 2

^

LSHIFT = 3
RSHIFT = 4

<<

LAST = 5
class Vips.OperationComplex(value)

Bases: GObject.GEnum

See also: vips_complex().

POLAR = 0

convert to polar coordinates

RECT = 1

convert to rectangular coordinates

CONJ = 2

complex conjugate

LAST = 3
class Vips.OperationComplex2(value)

Bases: GObject.GEnum

See also: vips_complex2().

CROSS_PHASE = 0

convert to polar coordinates

LAST = 1
class Vips.OperationComplexget(value)

Bases: GObject.GEnum

See also: vips_complexget().

REAL = 0

get real component

IMAG = 1

get imaginary component

LAST = 2
class Vips.OperationMath(value)

Bases: GObject.GEnum

See also: vips_math().

SIN = 0

sin(), angles in degrees

COS = 1

cos(), angles in degrees

LAST = 10
TAN = 2

tan(), angles in degrees

ASIN = 3

asin(), angles in degrees

ACOS = 4

acos(), angles in degrees

ATAN = 5

atan(), angles in degrees

LOG = 6

log base e

LOG10 = 7

log base 10

EXP = 8

e to the something

EXP10 = 9

10 to the something

class Vips.OperationMath2(value)

Bases: GObject.GEnum

See also: vips_math().

POW = 0

pow( left, right )

WOP = 1

pow( right, left )

LAST = 2
class Vips.OperationMorphology(value)

Bases: GObject.GEnum

More like hit-miss, really.

See also: vips_morph().

ERODE = 0

true if all set

DILATE = 1

true if one set

LAST = 2
class Vips.OperationRelational(value)

Bases: GObject.GEnum

See also: vips_relational().

EQUAL = 0

==

NOTEQ = 1

!=

LESS = 2

<

LESSEQ = 3

<=

MORE = 4
MOREEQ = 5

=

LAST = 6
class Vips.OperationRound(value)

Bases: GObject.GEnum

See also: vips_round().

RINT = 0

round to nearest

CEIL = 1

the smallest integral value not less than

FLOOR = 2

largest integral value not greater than

LAST = 3
class Vips.PCS(value)

Bases: GObject.GEnum

Pick a Profile Connection Space for vips_icc_import() and vips_icc_export(). LAB is usually best, XYZ can be more convenient in some cases.

LAB = 0

use CIELAB D65 as the Profile Connection Space

XYZ = 1

use XYZ as the Profile Connection Space

LAST = 2
class Vips.Precision(value)

Bases: GObject.GEnum

How accurate an operation should be.

INTEGER = 0

int everywhere

FLOAT = 1

float everywhere

APPROXIMATE = 2

approximate integer output

LAST = 3
class Vips.RegionShrink(value)

Bases: GObject.GEnum

How to calculate the output pixels when shrinking a 2x2 region.

MEAN = 0

use the average

MEDIAN = 1

use the median

MODE = 2

use the mode

MAX = 3

use the maximum

MIN = 4

use the minimum

NEAREST = 5

use the top-left pixel

LAST = 6
class Vips.Saveable(value)

Bases: GObject.GEnum

See also: Vips.ForeignSave.

MONO = 0

1 band (eg. CSV)

RGB = 1

1 or 3 bands (eg. PPM)

RGBA = 2

1, 2, 3 or 4 bands (eg. PNG)

RGBA_ONLY = 3

3 or 4 bands (eg. WEBP)

RGB_CMYK = 4

1, 3 or 4 bands (eg. JPEG)

ANY = 5

any number of bands (eg. TIFF)

LAST = 6
class Vips.Size(value)

Bases: GObject.GEnum

Controls whether an operation should upsize, downsize, both up and downsize, or force a size.

See also: vips_thumbnail().

BOTH = 0

size both up and down

UP = 1

only upsize

DOWN = 2

only downsize

FORCE = 3

force size, that is, break aspect ratio

LAST = 4
class Vips.Token(value)

Bases: GObject.GEnum

LEFT = 1
RIGHT = 2
STRING = 3
EQUALS = 4
COMMA = 5