mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-12-29 10:54:02 -05:00
df2557835b
* Crop avatar before resizing (#1268) Signed-off-by: Rob Watson <rfwatson@users.noreply.github.com> * Fix spelling error Signed-off-by: Rob Watson <rfwatson@users.noreply.github.com>
107 lines
2.6 KiB
Markdown
Vendored
107 lines
2.6 KiB
Markdown
Vendored
Cutter
|
|
======
|
|
|
|
A Go library to crop images.
|
|
|
|
[](https://travis-ci.org/oliamb/cutter)
|
|
[](https://godoc.org/github.com/oliamb/cutter)
|
|
|
|
Cutter was initially developped to be able
|
|
to crop image resized using github.com/nfnt/resize.
|
|
|
|
Usage
|
|
-----
|
|
|
|
Read the doc on https://godoc.org/github.com/oliamb/cutter
|
|
|
|
Import package with
|
|
|
|
```go
|
|
import "github.com/oliamb/cutter"
|
|
```
|
|
|
|
Package cutter provides a function to crop image.
|
|
|
|
By default, the original image will be cropped at the
|
|
given size from the top left corner.
|
|
|
|
```go
|
|
croppedImg, err := cutter.Crop(img, cutter.Config{
|
|
Width: 250,
|
|
Height: 500,
|
|
})
|
|
```
|
|
|
|
Most of the time, the cropped image will share some memory
|
|
with the original, so it should be used read only. You must
|
|
ask explicitely for a copy if nedded.
|
|
|
|
```go
|
|
croppedImg, err := cutter.Crop(img, cutter.Config{
|
|
Width: 250,
|
|
Height: 500,
|
|
Options: cutter.Copy,
|
|
})
|
|
```
|
|
|
|
It is possible to specify the top left position:
|
|
|
|
```go
|
|
croppedImg, err := cutter.Crop(img, cutter.Config{
|
|
Width: 250,
|
|
Height: 500,
|
|
Anchor: image.Point{100, 100},
|
|
Mode: cutter.TopLeft, // optional, default value
|
|
})
|
|
```
|
|
|
|
The Anchor property can represents the center of the cropped image
|
|
instead of the top left corner:
|
|
|
|
```go
|
|
croppedImg, err := cutter.Crop(img, cutter.Config{
|
|
Width: 250,
|
|
Height: 500,
|
|
Mode: cutter.Centered,
|
|
})
|
|
```
|
|
|
|
The default crop use the specified dimension, but it is possible
|
|
to use Width and Heigth as a ratio instead. In this case,
|
|
the resulting image will be as big as possible to fit the asked ratio
|
|
from the anchor position.
|
|
|
|
```go
|
|
croppedImg, err := cutter.Crop(baseImage, cutter.Config{
|
|
Width: 4,
|
|
Height: 3,
|
|
Mode: cutter.Centered,
|
|
Options: cutter.Ratio&cutter.Copy, // Copy is useless here
|
|
})
|
|
```
|
|
|
|
About resize
|
|
------------
|
|
This lib only manage crop and won't resize image, but it works great in combination with [github.com/nfnt/resize](https://github.com/nfnt/resize)
|
|
|
|
Contributing
|
|
------------
|
|
I'd love to see your contributions to Cutter. If you'd like to hack on it:
|
|
|
|
- fork the project,
|
|
- hack on it,
|
|
- ensure tests pass,
|
|
- make a pull request
|
|
|
|
If you plan to modify the API, let's disscuss it first.
|
|
|
|
Licensing
|
|
---------
|
|
MIT License, Please see the file called LICENSE.
|
|
|
|
Credits
|
|
-------
|
|
Test Picture: Gopher picture from Heidi Schuyt, http://www.flickr.com/photos/hschuyt/7674222278/,
|
|
© copyright Creative Commons(http://creativecommons.org/licenses/by-nc-sa/2.0/)
|
|
|
|
Thanks to Urturn(http://www.urturn.com) for the time allocated to develop the library.
|