Commit Graph

16 Commits

Author SHA1 Message Date
Benny Siegert
1be1b0af35 tiff: reject TIFF images with unsorted IFD tags.
The spec says that these images are invalid. Add a test with an invalid
tiff generated by go-fuzz.

Fixes golang/go#10549

Change-Id: I3fd3ae5e607202b41735a2d930f55cb7997f7a9b
Reviewed-on: https://go-review.googlesource.com/9377
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-10-04 16:59:28 +00:00
Nigel Tao
d6cb0a28ce tiff: re-organize some test cases, and make comment style consistent.
There is no code changes in this CL, just a copy/paste and some
wordsmithing.

Change-Id: I418e8aed5ab997fad4214e8049287cac4bce8bf6
Reviewed-on: https://go-review.googlesource.com/11274
Reviewed-by: Nigel Tao <nigeltao@golang.org>
2015-06-19 07:18:22 +00:00
Nigel Tao
e5f3f2f6c0 tiff: format the find/replace test strings consistently.
Change-Id: Id3222a76702e8f2017aec77a25df715ef378c8ef
Reviewed-on: https://go-review.googlesource.com/11224
Reviewed-by: Nigel Tao <nigeltao@golang.org>
2015-06-18 23:38:30 +00:00
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
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
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
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
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
a1da419f1a go.image/tiff: fix (TIFF-specific) LZW decompression.
The blue-purple-pink.lzwcompressed.tiff image was created by
"bmp2tiff -c lzw".

LGTM=djd
R=djd
CC=bsiegert, golang-codereviews
https://golang.org/cl/105750045
2014-06-02 14:51:51 +10:00
Patrick Riley
38c1f4ffe8 go.image/tiff: Support missing Compression tag
no_compress.tiff is no_rps.tiff that was read in by go.image/tiff and written out again (with a hack to avoid creating the Compression tag on the way out).

$ tiffdump no_compress.tiff
no_compress.tiff:
Magic: 0x4949 <little-endian> Version: 0x2a
Directory 0: offset 968 (0x3c8) next 0 (0)
ImageWidth (256) SHORT (3) 1<16>
ImageLength (257) SHORT (3) 1<15>
BitsPerSample (258) SHORT (3) 4<8 8 8 8>
Photometric (262) SHORT (3) 1<2>
StripOffsets (273) LONG (4) 1<8>
SamplesPerPixel (277) SHORT (3) 1<4>
RowsPerStrip (278) SHORT (3) 1<15>
StripByteCounts (279) LONG (4) 1<960>
XResolution (282) RATIONAL (5) 1<72>
YResolution (283) RATIONAL (5) 1<72>
ResolutionUnit (296) SHORT (3) 1<2>
ExtraSamples (338) SHORT (3) 1<2>

LGTM=bsiegert, nigeltao
R=bsiegert, nigeltao
CC=golang-codereviews
https://golang.org/cl/95930044
2014-05-12 16:41:44 +10:00
ChaiShushan
b2d744f611 go.image/tiff: support 16bit RGB
R=nigeltao, bsiegert
CC=golang-dev
https://golang.org/cl/13736044
2013-09-18 17:16:05 +10:00
ChaiShushan
de306d5329 go.image/tiff: decoder support tiled tiff format
Use these commands to generate testdata:
tiffcp -s -r 64 video-001.tiff video-001-strip-64.tiff
tiffcp -t -l 64 -w 64 video-001.tiff video-001-tile-64x64.tiff

R=golang-dev, nigeltao, bsiegert
CC=golang-dev
https://golang.org/cl/13453043
2013-09-06 20:07:58 +10:00
Benny Siegert
c35a1ecb6c go.image/tiff: use optimized routines for RGBA and NRGBA
Performance for an RGBA image:

benchmark          old ns/op    new ns/op    delta
BenchmarkEncode      1633495         7897  -99.52%

benchmark           old MB/s     new MB/s  speedup
BenchmarkEncode        37.83      7824.96  206.85x

NRGBA images are now encoded as such, the spec calls it
"unassociated alpha".

R=nigeltao, rsc
CC=golang-dev
https://golang.org/cl/6308049
2012-06-13 10:40:38 +10:00
Nigel Tao
996c335c4a go.image/{bmp,tiff}: move tiff/testdata to testdata.
Add a "compare to golden PNG" test for BMP and TIFF.

R=rsc
CC=golang-dev
https://golang.org/cl/5601054
2012-01-31 14:02:27 +11:00
Nigel Tao
cc3e6234e7 go.image: initial code.
Manual edits to README.
Moved from main Go repository, deleted Makefiles.

Tested with go test code.google.com/p/go.image/...

Fixes golang/go#2797.

R=rsc, rsc, r
CC=golang-dev
https://golang.org/cl/5593053
2012-01-31 11:32:50 +11:00