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Commit Graph

68 Commits

Author SHA1 Message Date
Nigel Tao
270f8447d6 image/jpeg: support 16-bit quantization tables and Extended Sequential
frames.

Fixes #9888.

Change-Id: I60f1d843e72e1b7bc77ab984f149c9ddb5258a06
Reviewed-on: https://go-review.googlesource.com/5251
Reviewed-by: Rob Pike <r@golang.org>
2015-02-19 05:00:43 +00:00
Nigel Tao
84c7a6583a image: change Rectangle.Eq to return true for all empty rectangles, even
if their nominal Min and Max points differ.

This is a behavior change, but arguably a bug fix, as Eq wasn't
previously consistent with In, and the concept of a rectangle being a
set of points. This is demonstrated by the new geom_test.go test.

It does mean that r.Eq(s) no longer implies that Inset'ting both r and s
with a negative inset results in two rectangles that are still Eq, but
that seems acceptable to me.

The previous behavior is still available as "r == s".

Also clarify the image.Rect doc comment when the inputs are
non-canonical.

Also simplify the Point and Rectangle Eq implementations dating from
before Go 1.0, when you couldn't compare structs via the == operator.

Change-Id: Ic39e628db31dc5fe5220f4b444e6d5000eeace5b
Reviewed-on: https://go-review.googlesource.com/5006
Reviewed-by: Rob Pike <r@golang.org>
2015-02-18 23:50:09 +00:00
Nigel Tao
391805b14b image/draw: add CMYK fast path.
Change-Id: I9582aff7ca141a8aead5692af74b9c708b1700cc
Reviewed-on: https://go-review.googlesource.com/5020
Reviewed-by: Rob Pike <r@golang.org>
2015-02-17 23:17:12 +00:00
Nigel Tao
5c8f9e38eb image: fix Rectangle.Overlaps and Rectangle.Union for empty rectangles.
Fixes #9895.

Change-Id: I37d78ced9ff8196e32d299504908a1c41ad4592d
Reviewed-on: https://go-review.googlesource.com/4990
Reviewed-by: Rob Pike <r@golang.org>
2015-02-17 03:40:33 +00:00
Nigel Tao
37a61746ee image/draw: add CMYK test.
This just adds test cases. Optimizing CMYK draws will be a follow-up
change.

Change-Id: Ic0d6343d420cd021e21f88623ad7182e93017da9
Reviewed-on: https://go-review.googlesource.com/4941
Reviewed-by: Rob Pike <r@golang.org>
2015-02-17 00:08:47 +00:00
Nigel Tao
10a4696fb8 image/jpeg: remove the (temporary) dependency on image/draw.
Change-Id: Idd66f9c3c9eaa4ff1f950fb90e4800dc625dec08
Reviewed-on: https://go-review.googlesource.com/4916
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
2015-02-16 04:37:15 +00:00
Nigel Tao
f10e03770c image/jpeg: support decoding CMYK and YCbCrK images.
The new testdata was created by:

convert video-001.png -colorspace cmyk video-001.cmyk.jpeg

video-001.cmyk.jpeg was then converted back to video-001.cmyk.png via
the GIMP. ImageMagick (convert) wasn't used for this second conversion
because IM's default color profiles complicates things.

Fixes #4500.

Change-Id: Ibf533f6a6c7e76883acc493ce3a4289d7875df3f
Reviewed-on: https://go-review.googlesource.com/4801
Reviewed-by: Rob Pike <r@golang.org>
2015-02-16 00:25:47 +00:00
Nigel Tao
b5c3a9e572 image: add image.CMYK and color.CMYK types.
Change-Id: Icf212a4b890725c803b16e76e1a88294b8b62cb8
Reviewed-on: https://go-review.googlesource.com/4800
Reviewed-by: Rob Pike <r@golang.org>
2015-02-16 00:08:49 +00:00
Andrew Ekstedt
f5f00be2ec image: fix obsolete reference in PalettedImage doc comment
PalettedColorModel was renamed to color.Palette
over three years ago by https://golang.org/cl/5132048.

Change-Id: I0204ade10eabff45620fda2990fed428c65d871e
Reviewed-on: https://go-review.googlesource.com/3305
Reviewed-by: Minux Ma <minux@golang.org>
Reviewed-by: Nigel Tao <nigeltao@golang.org>
2015-02-06 04:06:44 +00:00
Andrew Ekstedt
dfc4997ede image: fix typo in Alpha16 doc comment
Change-Id: Ie7031ae37f52ea1f229bfb769daf306d537b3d3e
Reviewed-on: https://go-review.googlesource.com/3300
Reviewed-by: Minux Ma <minux@golang.org>
2015-01-25 22:46:49 +00:00
Nigel Tao
9785a3962d image/draw: fold TestClipWithNilMP into TestClip.
https://go-review.googlesource.com/#/c/1876/ introduced a new
TestClipWithNilMP test, along with a code change that fixed a panic,
but the existing TestClip test already contained almost enough machinery
to cover that bug.

There is a small code change in this CL, but it is a no-op: (*x).y is
equivalent to x.y for a pointer-typed x, but the latter is cleaner.

Change-Id: I79cf6952a4999bc4b91f0a8ec500acb108106e56
Reviewed-on: https://go-review.googlesource.com/2304
Reviewed-by: Dave Cheney <dave@cheney.net>
2015-01-14 06:04:13 +00:00
Nigel Tao
0b52392ef7 image: use three-index slice for NewYCbCr.
This ensures that changing an image.YCbCr's Y values can't change its
chroma values, even after re-slicing up to capacity.

Change-Id: Icb626561522e336a3220e10f456c95330ae7db9e
Reviewed-on: https://go-review.googlesource.com/2209
Reviewed-by: Rob Pike <r@golang.org>
2015-01-05 03:32:15 +00:00
Dave Cheney
64e6fe2d29 image/draw: fix crash in clip
Fixes #9177

Change-Id: I1c7e57f0f0a9b00fb3ddc7fa4844ac53ea6df46f
Reviewed-on: https://go-review.googlesource.com/1876
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2014-12-20 06:00:38 +00:00
Russ Cox
04923042bd image/jpeg: handle Read returning n > 0, err != nil in d.fill
Fixes #9127.

LGTM=r
R=bradfitz, r
CC=golang-codereviews, nigeltao
https://golang.org/cl/178120043
2014-11-22 13:55:33 -05:00
Nigel Tao
0be3176a8b image/gif: don't let the per-frame transparent index modify the global
palette.

Fixes #7993.

LGTM=r
R=r
CC=golang-codereviews, james.jdunne
https://golang.org/cl/138600043
2014-09-22 14:29:45 +10:00
Nigel Tao
a2910958a2 image/gif: fix GIF encoding of sub-images.
benchmark                    old ns/op     new ns/op     delta
BenchmarkEncode              8641055       8646829       +0.07%

Fixes #7792.

LGTM=r
R=r
CC=dbathgate, golang-codereviews
https://golang.org/cl/147730043
2014-09-18 12:43:01 +10:00
Nigel Tao
8e77a7ef6b image/jpeg: reject invalid Ta and Td values.
Fixes #8693.

LGTM=crawshaw
R=crawshaw
CC=golang-codereviews
https://golang.org/cl/141470043
2014-09-15 08:41:59 +10:00
Russ Cox
c007ce824d build: move package sources from src/pkg to src
Preparation was in CL 134570043.
This CL contains only the effect of 'hg mv src/pkg/* src'.
For more about the move, see golang.org/s/go14nopkg.
2014-09-08 00:08:51 -04:00