module

Vips

Provides Crystal language interface to the libvips image processing library. Programs that use libvips don't manipulate images directly, instead they create pipelines of image processing operations starting from a source image. When the pipe is connected to a destination, the whole pipeline executes at once and in parallel, streaming the image from source to destination in a set of small fragments.

Constants

VERSION = {{ (`shards version \"/tmp/tmp.hPdFIo/src/src\"`).chomp.stringify }}

Class methods

at_least_libvips?(x : Int, y : Int, z = 0)

Is this at least libvips major.minor.[.patch]?

clear_error

concurrency

Returns the number of worker threads that vips uses for image evaluation.

concurrency=(value : Int)

Set the size of the pools of worker threads vips uses for image evaluation.

default_concurrency

Track the original default concurrency so we can reset to it.

enum_values(type : LibC::ULong)

Get all values for a enum (GType).

free(mem : Pointer(Void))

Frees the memory pointed to by mem

fundamental_type(type : LibC::ULong)

Extract the fundamental type ID portion.

get_enums

Get a list of enums available within the libvips library.

get_operations

Get a list of operations available within the libvips library. This can be useful for documentation generators

get_suffixes

Get a list of all the filename suffixes supported by libvips Note: At least libvips 8.8 is needed

init

Starts up the world of VIPS. this function is automatically called

initialized?

Flag to tell if libvips has been initialized or not. initialization will happen at the load of module and you should only call Vips#init if auto initialization failed.

leak=(leak)

Enable or disable libvips leak checking. When enabled, libvips will check for object and area leaks on exit. Enabling this option will make libvips run slightly more slowly.

leak?

Enable or disable libvips leak checking. When enabled, libvips will check for object and area leaks on exit. Enabling this option will make libvips run slightly more slowly.

nickname(type : LibC::ULong)

Return the nickname for a GType.

profile(profile)

profile=(profile)

Enable or disable libvips profile recording. If set, vips will record profiling information, and dump it on program exit. These profiles can be analyzed with the vipsprofile program.

profile?

Enable or disable libvips profile recording. If set, vips will record profiling information, and dump it on program exit. These profiles can be analyzed with the vipsprofile program.

report_leaks

Reports leaks (hopefully there are none) it also tracks and reports peak memory use.

shutdown

type_from_name(nickname : String)

Return the GType for a name.

typefind(basename : String, nickname : String)

Get the GType for a name. Looks up the GType for a nickname. Types below basename in the type hierarchy are searched.

typename(type : LibC::ULong)

Returns the name for a GType

vector=(val : Bool)

Enable SIMD and the run-time compiler. This can give a nice speed-up, but can also be unstable on some systems or with some versions of the run-time compiler.

vector?

Returns if SIMD and the run-time compiler is enabled or not

version(flag : Int)

Get the major, minor or patch version number of the libvips library. Pass 0 to get the major version number 1 to get minor, 2 to get patch.

version

Returns version of libvips in 3-byte integer

version_string

Returns version string of libvips