Lovell Fuller
28ce33feb3
Fix y-axis calc when overlaying at fixed point #566
2016-09-16 11:20:08 +01:00
cmtt
fc2002fbd0
Add alpha channels, if missing, to overlayWith images ( #540 )
2016-08-13 17:19:15 +01:00
Lovell Fuller
e6bfa52b0b
Add raw pixel data support to boolean and withOverlay ops
...
The previously-scattered image opening logic has been refactored to a
single ImageDescriptor struct/Object available to both JS and C++ code
This removed about 150 LOC but more importantly reduces the complexity
of adding/exposing new operations that require an input image.
2016-07-26 23:07:25 +01:00
Lovell Fuller
d1d6155fd1
Increase unit test coverage for recently added operations
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Switch param validation to use internal functions
2016-07-11 22:23:15 +01:00
Rahul Nanwani
278273b5c3
Add top/left offset support to overlayWith operation ( #473 )
2016-07-05 10:12:02 +01:00
Kleis Auke Wolthuizen
2e9cd83ed2
Add support for clipping/cutting out ( #435 ) ( #448 )
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USAGE: overlayWith('overlayimage.png', { cutout: true } )
2016-06-25 16:48:01 +01:00
lemnisk8
62554b766f
Add support for repeated/tiled overlay image ( #443 )
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USAGE: overlayWith('overlayimage.png', { tile: true, gravity: northwest} )
When using the tile option, the gravity option is applied to the extracted part of the tiled overlay image.
2016-05-26 16:42:17 +01:00
Lovell Fuller
d92ea31858
overlayWith improvements: diff sizes/formats, gravity, buffer input
2016-02-29 15:15:27 +00:00
Lovell Fuller
11329d5e09
Expose control of the number of open files in libvips' cache.
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Breaks API of existing cache method.
Disable libvips cache for I/O tests.
2016-02-03 17:48:22 +00:00
Lovell Fuller
5febce7a59
Remove executable bit from test/* file permissions
2015-11-21 23:05:48 +00:00
Lovell Fuller
022a2b1ade
Ensure test coverage of overlayWith error paths
2015-07-15 09:37:25 +01:00
Lovell Fuller
6ac47c1ef8
Add raw EXIF data to metadata response
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Copy metadata input buffer to match pipeline
Prevents possible metadata segfault under load
2015-06-28 23:35:40 +01:00
Lovell Fuller
1091be374e
Alpha compositing: support grey+alpha src and non-alpha dst
2015-06-02 14:51:08 +01:00
Lovell Fuller
8832ae0bf9
Add private maxColourDistance for functional tests
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Switch MSE-based tests to use it
Remove experimental MSE-based compare API
2015-06-01 14:21:02 +01:00
Daniel Gasienica
ef8db1eebf
Premultiply alpha channel to avoid dark artifacts during tranformation
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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
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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
