jst
016a61cd31
Optimize data-locality for a huge increase in processing speed.
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This is a complete rewrite! The tight scaling loop needs data locality for optimal performance. The old version used lots of pointer redirections to access image data which was bad for data locality. By providing the complete loop for each image type, this problem is solved. Unfortunately this increases code duplication but the result should be worth it: I could measure a ~6x speed-up for certain test cases!
2014-07-19 13:19:31 +02:00
jst
446eea2f7b
Remove LUT based filters.
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Caching kernel weights makes using the LUT based approach obsolete. Now they seem to be even slower than their counterparts.
2014-01-28 18:54:57 +01:00
jst
8f586c4f06
Add benchmarks to compare execution times.
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Run "go test -bench LargeJpegThumb" to benchmark all functions at once.
2014-01-18 11:55:34 +01:00
jst
252ccc84a2
Add benchmarks for Lanczos3Lut to compare it with Lanczos3 performance.
2013-07-08 20:55:46 +02:00
jst
da95f74904
go fmt
2013-03-10 11:55:50 +01:00
jst
852f4a47e7
Merge branch 'no-image-shift' of http://github.com/jsummers/nfnt.resize
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Merge branch 'fix-canvas-size-issue'
2013-03-10 11:33:44 +01:00
jst
84039c403b
Test for correct canvas size.
2013-03-10 10:58:08 +01:00
Jason Summers
3d9094eb9e
Center the resized image on the canvas, instead of shifting it slightly
2012-11-27 20:38:19 -05:00
jst
3e06045c3f
Speed up computation: Try to avoid Image.At() as much as possible -> specialized color access for some image types
2012-09-21 20:02:25 +02:00
jst
e548f52385
Blur input image during downscaling by scaling the filter kernel to prevent moires in the output image
2012-09-19 21:03:56 +02:00
jst
d0b2b9bc39
Added MitchellNetravali, changed Lanczos a bit
2012-09-19 19:32:00 +02:00
jst
3fc31c95cc
Kernel simplified
2012-09-15 19:30:32 +02:00
jst
339b8fd43a
Speed up calculation by avoiding dynamic casting
2012-09-01 00:21:10 +02:00
jst
9041d4db18
Function signature changed again, no need for multiple return value
2012-08-09 18:58:57 +02:00
jst
14d51db8b4
Changed function signature to include error handling. Filters simplified.
2012-08-08 21:32:51 +02:00
nfnt
fdc4a64918
Tests added
2012-08-03 18:12:26 +02:00
nfnt
428642c9f1
initial commit
2012-08-02 21:59:40 +02:00
