sharp

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Author SHA1 Message Date

Author	SHA1	Message	Date
Daniel Gasienica	ef8db1eebf	Premultiply alpha channel to avoid dark artifacts during tranformation Add `Sharp.compare(file1, file2, callback)` function for comparing images using mean squared error (MSE). This is useful for unit tests. See: - https://github.com/jcupitt/libvips/issues/291 - http://entropymine.com/imageworsener/resizealpha/	2015-06-01 14:21:02 +01:00
Daniel Gasienica	64f7f1d662	Add experimental `overlayWith` API Composites an overlay image with alpha channel into the input image (which must have alpha channel) using ‘over’ alpha compositing blend mode. This API requires both images to have the same dimensions. References: - http://en.wikipedia.org/wiki/Alpha_compositing#Alpha_blending - https://github.com/jcupitt/ruby-vips/issues/28#issuecomment-9014826 See #97.	2015-06-01 14:21:01 +01:00
Lovell Fuller	b50fb53f27	Use image fingerprints in functional tests #122	2015-06-01 14:21:01 +01:00

Daniel Gasienica

ef8db1eebf

Premultiply alpha channel to avoid dark artifacts during tranformation

Add `Sharp.compare(file1, file2, callback)` function for comparing images
using mean squared error (MSE). This is useful for unit tests.

See:
- https://github.com/jcupitt/libvips/issues/291
- http://entropymine.com/imageworsener/resizealpha/

2015-06-01 14:21:02 +01:00

Daniel Gasienica

64f7f1d662

Add experimental overlayWith API

Composites an overlay image with alpha channel into the input image (which
must have alpha channel) using ‘over’ alpha compositing blend mode. This API
requires both images to have the same dimensions.

References:
- http://en.wikipedia.org/wiki/Alpha_compositing#Alpha_blending
- https://github.com/jcupitt/ruby-vips/issues/28#issuecomment-9014826

See #97.

2015-06-01 14:21:01 +01:00

Lovell Fuller

b50fb53f27

Use image fingerprints in functional tests #122

2015-06-01 14:21:01 +01:00

3 Commits