Commit Graph

265 Commits

Author SHA1 Message Date
Jeff R. Allen
b7cdfbb5c4 image/tiff: fix a panic with invalid tile sizes
Fuzzing detected that an invalid tile size could cause a
panic. Fix a typo in the range check to solve it.

Fixes golang/go#10712.

Change-Id: I88a5a7884d98f622cc89ed6e394becebb07c6e60
Reviewed-on: https://go-review.googlesource.com/11020
Reviewed-by: Nigel Tao <nigeltao@golang.org>
2015-06-18 01:57:12 +00:00
Nigel Tao
9af7e1b58b tiff: don't apply the 8 bps predictor to a 1 bps image.
Change-Id: I112fc7189f8afdd54b96562e1989f9fca1d24d68
Reviewed-on: https://go-review.googlesource.com/11135
Reviewed-by: Benny Siegert <bsiegert@gmail.com>
Reviewed-by: Nigel Tao <nigeltao@golang.org>
2015-06-18 01:44:20 +00:00
Jeff R. Allen
3157439762 image/tiff: do not allow zero bits per sample
Fuzzing detected a divide by zero in images with 0 bits
per sample. Instead of panicing, return an error. Do more
validation of bits per sample so that the package only
supports what we've actually tested.

Fixes golang/go#10711.

Change-Id: Ib41b5cd798c32b06429164c9bc471f5f321d88c5
Reviewed-on: https://go-review.googlesource.com/10943
Reviewed-by: Benny Siegert <bsiegert@gmail.com>
Reviewed-by: Nigel Tao <nigeltao@golang.org>
2015-06-16 21:37:07 +00:00
Nigel Tao
d8e202c6ce vp8: limit all other partitions to 1<<24 bytes in size, not just N-1 of
them.

Also check for int32 overflow in the webp package.

Fixes #10790.

Change-Id: Id1162fad8a467a72a5379c7f4432d64ef25bc37a
Reviewed-on: https://go-review.googlesource.com/10072
Reviewed-by: Rob Pike <r@golang.org>
2015-05-15 01:02:58 +00:00
Aamir Khan
c5f9292598 vp8l: don't ignore I/O errors when reading LZ77 parameters.
Fixes golang/go#10383

Change-Id: I3e5e357a40a45189c31f0b4db9422dedc351c910
Reviewed-on: https://go-review.googlesource.com/9912
Reviewed-by: Nigel Tao <nigeltao@golang.org>
2015-05-11 04:53:56 +00:00
Aamir Khan
25eff15cb8 webp: fix panic in case of invalid chunkID
At the time of decoding webp file, if chunkID is not one of
{'ALPH', 'VP8', 'VP8L', 'VP8X'} return errInvalidFormat

Fixes golang/go#10384

Change-Id: I167909b5ddef174d161f806297a08fac6aabcf19
Reviewed-on: https://go-review.googlesource.com/9839
Reviewed-by: Nigel Tao <nigeltao@golang.org>
2015-05-11 04:53:49 +00:00
Nigel Tao
f28211f6e1 bmp: optimize decoding and encoding 0xH sized images.
It should be quick regardless of how large H is.

Fixes golang/go#10746

Change-Id: Icde36047e88d9786e64f44724b7ba8b38db2a33f
Reviewed-on: https://go-review.googlesource.com/9836
Reviewed-by: Nigel Tao <nigeltao@golang.org>
2015-05-11 00:10:33 +00:00
chai2010
4a3ed0c124 tiff: don't panic on reading bad ifd
Fixes golang/go#10597

Change-Id: I57b3614de7181134cf4bd0ca9dc9ff879d3d2e3d
Reviewed-on: https://go-review.googlesource.com/9414
Reviewed-by: Nigel Tao <nigeltao@golang.org>
2015-05-05 06:22:24 +00:00
Nigel Tao
70cb8023e6 draw: make op a mandatory argument, not optional.
Change-Id: Ic08ce587cf458444b098b752f0fa7ab16d43c914
Reviewed-on: https://go-review.googlesource.com/9468
Reviewed-by: Rob Pike <r@golang.org>
2015-05-04 06:41:52 +00:00
Benny Siegert
6af46c2009 tiff: reject IFDs whose data is longer than int.
Fixes golang/go#10596

Change-Id: Ib5035569e84c67868c7f278281620f6c9b11b470
Reviewed-on: https://go-review.googlesource.com/9378
Reviewed-by: Nigel Tao <nigeltao@golang.org>
2015-05-04 03:48:26 +00:00
Nigel Tao
918b3735c3 draw: disable the image.Rectangle DstMask fast path until Go 1.5 is
released.

Change-Id: Ie5d6766d53952d3a81dfbd19a9f4022aaad6af5a
Reviewed-on: https://go-review.googlesource.com/9463
Reviewed-by: Rob Pike <r@golang.org>
2015-04-29 03:28:00 +00:00
Nigel Tao
b2f48f3f51 tiff: don't panic on reading short block data.
Fixes golang/go#10394

Change-Id: I12621650f0c21579047497407ca2745febe4521b
Reviewed-on: https://go-review.googlesource.com/9278
Reviewed-by: Benny Siegert <bsiegert@gmail.com>
Reviewed-by: Nigel Tao <nigeltao@golang.org>
2015-04-28 01:06:15 +00:00
Håvard Haugen
72a6583050 x/image/tiff: fix division by zero when decoding empty image
Return a zero width or zero height image of the appropriate type.

Fixes golang/go#10393.

Change-Id: I3aa7b6125447726600fb072ce1e8682373ce2a57
Reviewed-on: https://go-review.googlesource.com/9182
Reviewed-by: Nigel Tao <nigeltao@golang.org>
2015-04-28 00:39:31 +00:00
Nigel Tao
95ece4346f cmd/webp-manual-test: add a "build ignore" tag, so that "go install
golang.org/x/image/..." doesn't install the manual testing program.

Also add a missing copyright notice.

Change-Id: I7ab0a438df09ac8882e7d2482d2bf96d4260f8eb
Reviewed-on: https://go-review.googlesource.com/9277
Reviewed-by: Rob Pike <r@golang.org>
2015-04-27 00:40:42 +00:00
Nigel Tao
8642173156 draw: implement srcMask.
Change-Id: Ibf710521f466847afaf2d005dc8a2bb817169298
Reviewed-on: https://go-review.googlesource.com/9276
Reviewed-by: Rob Pike <r@golang.org>
2015-04-26 09:25:24 +00:00
chai2010
f681781743 tiff: fix shadowed err variable.
Fixes golang/go#10395

Change-Id: Ice768df7bb0bdac979d49328bfdf0d6713a1e7c3
Reviewed-on: https://go-review.googlesource.com/9264
Reviewed-by: Nigel Tao <nigeltao@golang.org>
2015-04-24 01:40:59 +00:00
Nigel Tao
24b0de15f1 draw: add a fast path for an image.Rectangle DstMask.
Change-Id: Id5227b9d217b56a342bc1ffc735dababa8a9e3e9
Reviewed-on: https://go-review.googlesource.com/9233
Reviewed-by: Rob Pike <r@golang.org>
2015-04-24 00:51:48 +00:00
Nigel Tao
b621bdc118 draw: delete some dead code.
Change-Id: I5830755b0be52df2be536a918f47684a1b7eda9d
Reviewed-on: https://go-review.googlesource.com/9232
Reviewed-by: Rob Pike <r@golang.org>
2015-04-22 05:24:54 +00:00
Nigel Tao
3940ddb240 draw: implement dstMask.
Change-Id: Id63695c3cef67fbe79fa1fbe916b85108f401093
Reviewed-on: https://go-review.googlesource.com/9191
Reviewed-by: Rob Pike <r@golang.org>
2015-04-22 04:18:19 +00:00
Nigel Tao
76b4869e5a draw: factor out some float64 to uint32 conversions.
This will make the upcoming "implement masks" change easier.

Change-Id: I2b316a0b25f98779d9cd076e64266c617464a08e
Reviewed-on: https://go-review.googlesource.com/8999
Reviewed-by: Rob Pike <r@golang.org>
2015-04-21 01:05:21 +00:00
Nigel Tao
26bd17363f draw: plumb the Options through to the type-specific code.
It'll only be used by the fallback code paths, but it's easiest if all
code paths take the extra argument.

Change-Id: I09c4067df6af7c4cd270e8ffcad96d1d8af29057
Reviewed-on: https://go-review.googlesource.com/8909
Reviewed-by: Rob Pike <r@golang.org>
2015-04-16 23:50:31 +00:00
Nigel Tao
69a0d8f9aa draw: add mask fields to Options.
This change only adds the fields, more or less. Follow-up changes will
actually honor the masks.

Change-Id: I81411dc1aac4b3c846dcdf13e2cb0b5cd60fb2b4
Reviewed-on: https://go-review.googlesource.com/8902
Reviewed-by: Rob Pike <r@golang.org>
2015-04-16 00:20:49 +00:00
Nigel Tao
e83a2376af draw: refactor codegen to use argf instead of fmt.Sprintf.
Change-Id: Iee4cb1b605c381b75a688a5e65e9afc4d34df193
Reviewed-on: https://go-review.googlesource.com/8900
Reviewed-by: Rob Pike <r@golang.org>
2015-04-14 01:31:41 +00:00
Nigel Tao
8ed4ff0a33 draw: implement the Over operator.
Change-Id: Id207b8f2fa5233175285800477e60f111ef4af63
Reviewed-on: https://go-review.googlesource.com/8744
Reviewed-by: Rob Pike <r@golang.org>
2015-04-13 23:42:02 +00:00
Nigel Tao
697863cec6 draw: clamp kernel output so red, green and blue <= alpha.
The raw computation can produce red > alpha when some weights are
negative.

Change-Id: Ic6701354770f012d3ef21a390a8400e14e9d1e25
Reviewed-on: https://go-review.googlesource.com/8740
Reviewed-by: Rob Pike <r@golang.org>
2015-04-10 05:40:26 +00:00
Nigel Tao
67c770d218 draw: substitute Src for Over when the source image is completely opaque.
The two Ops are equivalent, but Src is faster.

Change-Id: I2c73a13755047c224c71fb5af786875f02681de9
Reviewed-on: https://go-review.googlesource.com/8640
Reviewed-by: Rob Pike <r@golang.org>
2015-04-08 22:38:33 +00:00
Nigel Tao
65a798f031 draw: generate code for op == Over.
This change just does the mechanical codegen for the op == Over cases.
The actual compositing operator is still effectively Src. Fixing that,
which is less mechanical, will be a follow-up change.

Change-Id: I87805114d49e7ce7087066187a2f4c722a883c01
Reviewed-on: https://go-review.googlesource.com/8524
Reviewed-by: Rob Pike <r@golang.org>
2015-04-07 22:35:06 +00:00
Nigel Tao
b293696c81 draw: switch on the Op compositing operator.
This change only *prepares* the codegen to handle multiple Ops. The
actual generated code still only supports one Op (Src) and not the other
(Over). A follow-up change will add Over.

This Op switch (an eventual x2 multiplier in the amount of code
generated) should be the last of the codegen LoC multipliers. The dst
and src mask options will be implemented in the slow path fallback.

Change-Id: Iecbcc6fad063e2aac36d78d5380c0a0947c709df
Reviewed-on: https://go-review.googlesource.com/8488
Reviewed-by: Rob Pike <r@golang.org>
2015-04-07 06:16:14 +00:00
Nigel Tao
c53fa16781 draw: use a sync.Pool for kernel scaling's temporary buffers.
benchmark                      old ns/op     new ns/op     delta
BenchmarkScaleBLLargeDown      257715146     260286012     +1.00%
BenchmarkScaleCRLargeDown      426797448     430078734     +0.77%
BenchmarkScaleBLDown           4449939       4222542       -5.11%
BenchmarkScaleCRDown           8160446       8010056       -1.84%
BenchmarkScaleBLUp             22290312      21044122      -5.59%
BenchmarkScaleCRUp             33010722      32021468      -3.00%
BenchmarkScaleCRSrcGray        13307961      13020192      -2.16%
BenchmarkScaleCRSrcNRGBA       40567431      40801939      +0.58%
BenchmarkScaleCRSrcRGBA        39892971      40240558      +0.87%
BenchmarkScaleCRSrcYCbCr       59020222      59686699      +1.13%

benchmark                      old allocs     new allocs     delta
BenchmarkScaleBLLargeDown      1              1              +0.00%
BenchmarkScaleCRLargeDown      1              2              +100.00%
BenchmarkScaleBLDown           1              0              -100.00%
BenchmarkScaleCRDown           1              0              -100.00%
BenchmarkScaleBLUp             1              0              -100.00%
BenchmarkScaleCRUp             1              0              -100.00%
BenchmarkScaleCRSrcGray        1              0              -100.00%
BenchmarkScaleCRSrcNRGBA       1              0              -100.00%
BenchmarkScaleCRSrcRGBA        1              0              -100.00%
BenchmarkScaleCRSrcYCbCr       1              0              -100.00%

benchmark                      old bytes     new bytes     delta
BenchmarkScaleBLLargeDown      14745600      2949200       -80.00%
BenchmarkScaleCRLargeDown      14745600      4915333       -66.67%
BenchmarkScaleBLDown           1523712       5079          -99.67%
BenchmarkScaleCRDown           1523712       7619          -99.50%
BenchmarkScaleBLUp             10117120      101175        -99.00%
BenchmarkScaleCRUp             10117120      202350        -98.00%
BenchmarkScaleCRSrcGray        4915200       49156         -99.00%
BenchmarkScaleCRSrcNRGBA       4915200       163853        -96.67%
BenchmarkScaleCRSrcRGBA        4915200       163853        -96.67%
BenchmarkScaleCRSrcYCbCr       4915200       245780        -95.00%

The increase in BenchmarkScale??LargeDown number of allocs I think is an
accounting error due to the low number of iterations: a low denominator.
I suspect that there are one or two extra allocs up front for using the
sync.Pool, but one fewer alloc per iteration. The number of iterations
is only 5 for BL and 3 for CR, for the default timeout. If I increase
the -test.benchtime value to 5s, then the reported average (allocs/op)
drop from 2 to 0, so the delta should actually be -100% instead of +0 or
+100%.

Change-Id: I21d9bb0086bdb25517b6a430e8a21bdf3db026f6
Reviewed-on: https://go-review.googlesource.com/8150
Reviewed-by: Rob Pike <r@golang.org>
2015-04-02 05:39:46 +00:00
Nigel Tao
d5c5125b57 draw: update the inlined YCbCr.RGBA code to use 16 bit color.
This matches the standard library change at
https://go-review.googlesource.com/#/c/8073/

Change-Id: I216028e18678a70e449167cd9ab910c63d37adcc
Reviewed-on: https://go-review.googlesource.com/8075
Reviewed-by: Rob Pike <r@golang.org>
2015-03-26 22:31:54 +00:00
Nigel Tao
500a27f912 draw: optimize some multiply-by-zeroes in Kernel.Transform.
benchmark                      old ns/op     new ns/op     delta
BenchmarkTformCRSrcGray        5096041       4820642       -5.40%
BenchmarkTformCRSrcNRGBA       10476578      8414331       -19.68%
BenchmarkTformCRSrcRGBA        10361135      7954413       -23.23%
BenchmarkTformCRSrcYCbCr       11952218      9824899       -17.80%

Change-Id: I8b4cfe68ecae85e447ae65ceecf185261445a8a2
Reviewed-on: https://go-review.googlesource.com/7991
Reviewed-by: Rob Pike <r@golang.org>
2015-03-25 21:02:11 +00:00
Nigel Tao
575b100276 draw: eliminate some math.Floor calls in Transform methods.
benchmark                      old ns/op     new ns/op     delta
BenchmarkTformNNSrcRGBA        524533        293230        -44.10%
BenchmarkTformNNSrcUniform     362974        149389        -58.84%
BenchmarkTformABSrcGray        827461        427720        -48.31%
BenchmarkTformABSrcNRGBA       1286930       919391        -28.56%
BenchmarkTformABSrcRGBA        1115444       794334        -28.79%
BenchmarkTformABSrcYCbCr       1732420       1379846       -20.35%
BenchmarkTformCRSrcGray        3629048       3467404       -4.45%
BenchmarkTformCRSrcNRGBA       7569407       7418874       -1.99%
BenchmarkTformCRSrcRGBA        7552459       7432745       -1.59%
BenchmarkTformCRSrcYCbCr       8072351       7854715       -2.70%

Change-Id: I6c01e631d9f88c36ae99d0cd181104ad5ac48db0
Reviewed-on: https://go-review.googlesource.com/7926
Reviewed-by: Rob Pike <r@golang.org>
2015-03-23 22:47:47 +00:00
Nigel Tao
41f747b91e draw: inline the generated YCbCrToRGB calls.
benchmark                      old ns/op     new ns/op     delta
BenchmarkScaleLargeDownNN      1302036       1168046       -10.29%
BenchmarkScaleLargeDownAB      3995006       3447621       -13.70%
BenchmarkScaleLargeDownBL      455470707     387598726     -14.90%
BenchmarkScaleLargeDownCR      818317661     679199442     -17.00%
BenchmarkScaleSrcYCbCr         3965076       3422325       -13.69%
BenchmarkTformABSrcYCbCr       2921253       2551934       -12.64%
BenchmarkTformCRSrcYCbCr       14839184      12263956      -17.35%

Change-Id: I60dcb5c00a30709fdc6616cbc8c2fc48ec3a8b14
Reviewed-on: https://go-review.googlesource.com/7921
Reviewed-by: Rob Pike <r@golang.org>
2015-03-23 00:17:39 +00:00
Nigel Tao
7eedc6044d draw: add Scale and Transform fast paths for Uniform src images.
benchmark                      old ns/op     new ns/op     delta
BenchmarkScaleSrcUniform       1744610       6305          -99.64%
BenchmarkTformABSrcUniform     586201        520028        -11.29%
BenchmarkTformCRSrcUniform     586952        519151        -11.55%

Change-Id: Ide9148f9e91bb6ec607fa7e9d78b35772ca189fe
Reviewed-on: https://go-review.googlesource.com/7881
Reviewed-by: Rob Pike <r@golang.org>
2015-03-21 04:28:23 +00:00
Nigel Tao
4180bcbc4a draw: inline the generated PixOffset calls.
Only the YCbCr benchmarks show significant changes. The other benchmark
changes look noisy. The PixOffset and YOffset calls were previously
already inlined by the gc compiler. COffset was different because it's
more complicated than YOffset, and the switch inside the COffset body is
redundant when you already know the src image sratio.
http://golang.org/src/image/ycbcr.go?s=2377:2414#L77

benchmark                      old ns/op     new ns/op     delta
BenchmarkScaleLargeDownNN      1037504       908236        -12.46%
BenchmarkScaleLargeDownAB      3196568       2735776       -14.42%
BenchmarkScaleLargeDownBL      357165552     311463393     -12.80%
BenchmarkScaleLargeDownCR      649403305     544985134     -16.08%
BenchmarkScaleSrcYCbCr         3204063       2699147       -15.76%
BenchmarkTformABSrcYCbCr       2155142       1968540       -8.66%
BenchmarkTformCRSrcYCbCr       11672625      9865358       -15.48%

Change-Id: Ifa109363a1282ab114b2fdb0b577dcafef927333
Reviewed-on: https://go-review.googlesource.com/7880
Reviewed-by: Rob Pike <r@golang.org>
2015-03-21 04:17:09 +00:00
Nigel Tao
415cb3b420 draw: add Scale and Transform fast paths for YCbCr src images.
benchmark                      old ns/op      new ns/op     delta
BenchmarkScaleLargeDownNN      3239565        1044458       -67.76%
BenchmarkScaleLargeDownAB      12162059       3205972       -73.64%
BenchmarkScaleLargeDownBL      1437923310     358229213     -75.09%
BenchmarkScaleLargeDownCR      2844139449     651228380     -77.10%
BenchmarkScaleSrcYCbCr         12413692       3176042       -74.42%
BenchmarkTformABSrcYCbCr       8363947        2163052       -74.14%
BenchmarkTformCRSrcYCbCr       49944171       11652821      -76.67%

Change-Id: I8cd5ab20aa1f516114599690cab037441a328aec
Reviewed-on: https://go-review.googlesource.com/7796
Reviewed-by: Rob Pike <r@golang.org>
2015-03-20 00:55:56 +00:00
Nigel Tao
c62001d39b draw: optimize Kernel.Transform.
benchmark                      old ns/op      new ns/op      delta
BenchmarkTformCRSrcGray        6111610        5344117        -12.56%
BenchmarkTformCRSrcNRGBA       62070281       59295178       -4.47%
BenchmarkTformCRSrcRGBA        13840290       10612547       -23.32%
BenchmarkTformCRSrcUniform     591637         587621         -0.68%
BenchmarkTformCRSrcYCbCr       72219184       69404747       -3.90%

As of current origin/master, Gray and RGBA have fast paths but the other src
image types do not. They have more fat, so the relative improvement is smaller.

Change-Id: Ibbae91cd3cb3c139efb1dcc8fda1cb6432505189
Reviewed-on: https://go-review.googlesource.com/7794
Reviewed-by: Rob Pike <r@golang.org>
2015-03-19 21:20:14 +00:00
Nigel Tao
ffd1dee1b5 draw: add a fast path for NRGBA src images.
benchmark                      old ns/op      new ns/op      delta
BenchmarkScaleSrcNRGBA         14142583       2043782        -85.55%
BenchmarkTformABSrcNRGBA       9846421        1993564        -79.75%
BenchmarkTformCRSrcNRGBA       62041569       13866457       -77.65%

Change-Id: I1edf699dfc6436c0da7e3ab221684406ab1e362f
Reviewed-on: https://go-review.googlesource.com/7793
Reviewed-by: Rob Pike <r@golang.org>
2015-03-19 21:00:06 +00:00
Nigel Tao
5fe9683216 draw: change tweaks to be at end-of-line, not start-of-line.
I think it reads better that way.

Change-Id: I770fdb6362d2a281f7c62cabade186725daced9b
Reviewed-on: https://go-review.googlesource.com/7714
Reviewed-by: Rob Pike <r@golang.org>
2015-03-19 06:15:25 +00:00
Nigel Tao
ad68cd9759 draw: distinguish YCbCr fast paths by their chroma subsample ratios.
These code paths aren't actually fast yet. That will be a follow-up
change.

Change-Id: I814992573cc6af422e49d0ddf336003e662897a5
Reviewed-on: https://go-review.googlesource.com/7791
Reviewed-by: Rob Pike <r@golang.org>
2015-03-19 00:59:56 +00:00
Josh Bleecher Snyder
5afc4bbba5 image: add codereview.cfg
See golang.org/cl/4131 for context.

Change-Id: If30a8f22fe02ef58e94ee3c90afc065d9cd954d0
Reviewed-on: https://go-review.googlesource.com/7723
Reviewed-by: David Crawshaw <crawshaw@golang.org>
2015-03-18 17:04:05 +00:00
Nigel Tao
2f47ec36fb draw: add a fast path for Gray src images.
benchmark                      old ns/op      new ns/op      delta
BenchmarkScaleSrcGray          9296680        552705         -94.05%
BenchmarkTformABSrcGray        6323894        817986         -87.07%
BenchmarkTformCRSrcGray        39229583       4193194        -89.31%

Change-Id: Ie7d43dfe323d49b245b47c3206b5aad2b50cb7fb
Reviewed-on: https://go-review.googlesource.com/7711
Reviewed-by: Rob Pike <r@golang.org>
2015-03-18 06:04:53 +00:00
Nigel Tao
ff75b2d824 draw: have TestSrcTranslationInvariance work on smaller images.
Before/after:
$ go test
PASS
ok      golang.org/x/image/draw 1.173s
$ go test
PASS
ok      golang.org/x/image/draw 0.225s

Change-Id: I5b4742f045870db9353da1d85b0677be992cb347
Reviewed-on: https://go-review.googlesource.com/7712
Reviewed-by: Rob Pike <r@golang.org>
2015-03-18 06:02:26 +00:00
Nigel Tao
a71fdfe7d1 draw: implement Kernel.Transform.
Also fix the NN and ABL fast paths to only apply if we can access the
Pix elements without src-bounds checking.

Change-Id: Ie9fc96b28e0665df49d00c4c53cb81385faee4db
Reviewed-on: https://go-review.googlesource.com/7675
Reviewed-by: Rob Pike <r@golang.org>
2015-03-17 23:09:51 +00:00
Nigel Tao
9b6f4595fb draw: actually use type-specific Transform code paths.
I simply forgot to do this in the previous change.

Change-Id: I0ea5d6bb0a09154cb995a665476ffceb155bd49e
Reviewed-on: https://go-review.googlesource.com/7651
Reviewed-by: Rob Pike <r@golang.org>
2015-03-17 01:16:05 +00:00
Nigel Tao
87013da148 draw: implement NearestNeighbor and ApproxBiLinear Transform.
Change-Id: I70a5e3703dea436354e9591fce7b704ec749c2d1
Reviewed-on: https://go-review.googlesource.com/7541
Reviewed-by: Rob Pike <r@golang.org>
2015-03-16 23:32:22 +00:00
Nigel Tao
ab1ce1a88c draw: make example_test more example-like, by being outside "package
draw".

Change-Id: Ie65c96a81250866c5813d4e3a8843b1168ed5579
Reviewed-on: https://go-review.googlesource.com/7612
Reviewed-by: Rob Pike <r@golang.org>
2015-03-15 21:34:34 +00:00
Nigel Tao
4bf24024c9 draw: add a test for src translation invariance.
Change-Id: Iedd4cc4e2b88c5fa9e4fcd547756588e4d87bfff
Reviewed-on: https://go-review.googlesource.com/7471
Reviewed-by: Rob Pike <r@golang.org>
2015-03-12 23:26:12 +00:00
Nigel Tao
efa0c0977f draw: implement Copy; add an example_test.
Change-Id: Ia9cceac17c0326702530eac3a205308b02b85986
Reviewed-on: https://go-review.googlesource.com/7262
Reviewed-by: Rob Pike <r@golang.org>
2015-03-11 22:37:25 +00:00
Nigel Tao
08593990c4 draw: add Transformer and Option types.
Just stub implementations for now. Actual implementations will be
follow-up changes.

Change-Id: Id21d9042a2073c2dc0f78c9977c4940f000a41df
Reviewed-on: https://go-review.googlesource.com/6805
Reviewed-by: Rob Pike <r@golang.org>
2015-03-10 00:41:02 +00:00