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Commit Graph

40 Commits

Author SHA1 Message Date
Brad Fitzpatrick
437015bbed png: speed up opaque RGBA encoding
With Linux/8g on a 2006 Mac Mini (1.66 GHz Intel Core Duo,
2KB L1, 2MB L2, 2G main memory), GOMAXPROCS unset:

start:
png.BenchmarkEncodePaletted	      50	  44772820 ns/op
png.BenchmarkEncodeRGBOpaque	      10	 208395900 ns/op
png.BenchmarkEncodeRGBA		       5	 331088000 ns/op

remove interface method calls:
png.BenchmarkEncodePaletted	      50	  44722880 ns/op
png.BenchmarkEncodeRGBOpaque	      10	 139042600 ns/op
png.BenchmarkEncodeRGBA		       5	 334033600 ns/op

flate inline min/max():
png.BenchmarkEncodePaletted	      50	  40631180 ns/op
png.BenchmarkEncodeRGBOpaque	      10	 124894900 ns/op
png.BenchmarkEncodeRGBA		       5	 312099000 ns/op

after adler change:
png.BenchmarkEncodePaletted	      50	  40181760 ns/op
png.BenchmarkEncodeRGBOpaque	      20	 121781950 ns/op
png.BenchmarkEncodeRGBA		       5	 313890800 ns/op

In comparison to 121 ms on this 2006 machine, on my
Core2 Duo 2.66 GHz laptop, the final BenchmarkEncodeRGBOpaque
runs in 27 ms. (these are all for 640x480 images)

R=nigeltao, rsc, r
CC=golang-dev
https://golang.org/cl/4432077
2011-05-02 07:25:53 -07:00
Brad Fitzpatrick
f5fa215d8a image: png & jpeg encoding benchmarks
No code changes in this CL.

R=r
CC=golang-dev
https://golang.org/cl/4445074
2011-04-29 10:42:44 -07:00
Nigel Tao
6a186d38d1 src/pkg: make package doc comments consistently start with "Package foo".
R=rsc
CC=golang-dev
https://golang.org/cl/4442064
2011-04-20 09:57:05 +10:00
Rob Pike
8a90fd3c72 os: New Open API.
We replace the current Open with:
OpenFile(name, flag, perm) // same as old Open
Open(name) // same as old Open(name, O_RDONLY, 0)
Create(name) // same as old Open(name, O_RDWR|O_TRUNC|O_CREAT, 0666)

This CL includes a gofix module and full code updates: all.bash passes.
(There may be a few comments I missed.)

The interesting packages are:
        gofix
        os
Everything else is automatically generated except for hand tweaks to:
        src/pkg/io/ioutil/ioutil.go
        src/pkg/io/ioutil/tempfile.go
        src/pkg/crypto/tls/generate_cert.go
        src/cmd/goyacc/goyacc.go
        src/cmd/goyacc/units.y

R=golang-dev, bradfitzwork, rsc, r2
CC=golang-dev
https://golang.org/cl/4357052
2011-04-04 23:42:14 -07:00
Rob Pike
7f9acb53cb testing: shorten some more tests
R=rsc
CC=golang-dev
https://golang.org/cl/4314044
2011-03-26 11:25:22 -07:00
Mikael Tillenius
ca0d483014 image/png: support for more formats
Added support for reading images with grayscale + alpha and
for images with depth 1, 2 or 4.

R=nigeltao
CC=golang-dev
https://golang.org/cl/4174053
2011-02-22 10:04:32 +11:00
Brad Fitzpatrick
ad7d24ac4b image/png: speed up paletted encoding ~25%
Avoids a lot of redundant bounds checks.

R=nigeltao, rsc
CC=golang-dev
https://golang.org/cl/2678041
2010-10-27 22:48:18 +11:00
Andrew Gerrand
03babfc626 Use Errorf where appropriate.
R=r, r2
CC=golang-dev
https://golang.org/cl/2308043
2010-10-01 14:14:18 +10:00
Nigel Tao
2b4218f321 image: introduce Config type and DecodeConfig function, to decode an
image's color model and dimensions without allocating and decoding its
actual pixels.

Fixes #695.

R=r
CC=golang-dev
https://golang.org/cl/2151042
2010-09-03 18:03:08 +10:00
Russ Cox
da392d9136 build: no required environment variables
R=adg, r, PeterGo
CC=golang-dev
https://golang.org/cl/1942044
2010-08-18 10:08:49 -04:00
Nigel Tao
07053ac6e4 image/png: support 16-bit color.
R=r, mpl
CC=golang-dev
https://golang.org/cl/1944043
2010-08-16 23:33:20 +10:00
Mathieu Lonjaret
90a6c91890 png: grayscale support.
R=nigeltao_golang, r
CC=golang-dev
https://golang.org/cl/1897049
2010-08-10 12:25:08 +10:00
Nigel Tao
5eb35e4247 image: replace Width and Height by Bounds, and introduce the Point and
Rect types.

The actual image representation is unchanged. A future change will
replace the {[][]color} with {[]color, stride int, r Rectangle} and
possibly a clip region.

The draw.Color, draw.Point and draw.Rect types will be removed in a
future change. Trying to do it in this one polluted the diff with
trivia.

R=r, rsc
CC=golang-dev
https://golang.org/cl/1918047
2010-08-10 12:08:52 +10:00
Nigel Tao
893fdbbe5d image: introduce Decode and RegisterFormat.
R=r, rsc
CC=golang-dev
https://golang.org/cl/1849054
2010-08-09 10:44:38 +10:00
Nigel Tao
55badd474b image/png: use image-specific methods for checking opacity.
R=rsc
CC=golang-dev, mpl
https://golang.org/cl/1894047
2010-08-02 09:52:15 +10:00
Russ Cox
1b79cd2e71 undo changes accidentally included in 09c5add99d50
R=ken2
CC=golang-dev
https://golang.org/cl/1736042
2010-06-20 12:45:39 -07:00
Russ Cox
a212d174ac gc: better error messages for interface failures, conversions
x.go:13: cannot use t (type T) as type Reader in assignment:
	T does not implement Reader (Read method requires pointer receiver)
x.go:19: cannot use q (type Q) as type Reader in assignment:
	Q does not implement Reader (missing Read method)
		have read()
		want Read()
x.go:22: cannot use z (type int) as type Reader in assignment:
	int does not implement Reader (missing Read method)

x.go:24: too many arguments to conversion to complex: complex(1, 3)

R=ken2
CC=golang-dev
https://golang.org/cl/1736041
2010-06-20 11:45:53 -07:00
Nigel Tao
2bb59fd71a Make image.Color.RGBA return 16 bit color instead of 32 bit color.
R=rsc
CC=golang-dev
https://golang.org/cl/1388041
2010-05-28 12:59:21 -07:00
Rob Pike
f023e859cf compress: renamings.
NewDeflater -> NewWriter
NewInflater -> NewReader
Deflater -> Compressor
Inflater -> Decompressor

R=rsc
CC=golang-dev
https://golang.org/cl/1166041
2010-05-07 14:32:34 -07:00
Nigel Tao
5042a4e9f9 PNG decoder now handles transparent paletted images.
Fixes #439.

R=r
CC=golang-dev
https://golang.org/cl/181087
2009-12-29 15:23:55 +11:00
Robert Griesemer
a3d1045fb7 1) Change default gofmt default settings for
parsing and printing to new syntax.

   Use -oldparser to parse the old syntax,
   use -oldprinter to print the old syntax.

2) Change default gofmt formatting settings
   to use tabs for indentation only and to use
   spaces for alignment. This will make the code
   alignment insensitive to an editor's tabwidth.

   Use -spaces=false to use tabs for alignment.

3) Manually changed src/exp/parser/parser_test.go
   so that it doesn't try to parse the parser's
   source files using the old syntax (they have
   new syntax now).

4) gofmt -w src misc test/bench

3rd set of files.

R=rsc
CC=golang-dev
https://golang.org/cl/180048
2009-12-15 15:35:38 -08:00
Sergio Luis O. B. Correia
6fc820729e go: makes it build for the case $GOROOT has whitespaces
the bash scripts and makefiles for building go didn't take into account
the fact $GOROOT / $GOBIN could both be directories containing whitespaces,
and was not possible to build it in such a situation.

this commit adjusts the various makefiles/scripts to make it aware of that
possibility, and now it builds successfully when using a path with whitespaces
as well.

Fixes #115.

R=rsc, dsymonds1
https://golang.org/cl/157067
2009-11-23 17:32:51 -08:00
Russ Cox
9ac4449cb2 gofmt -r 'α[β:len(α)] -> α[β:]' -w src/cmd src/pkg
R=r, gri
CC=golang-dev
https://golang.org/cl/156115
2009-11-20 11:45:05 -08:00
Robert Griesemer
3bb0032cd6 - replaced gofmt expression formatting algorithm with
rsc's algorithm
- applied gofmt -w misc src
- partial CL (last chunk)

R=rsc, r
http://go/go-review/1024041
2009-11-09 21:23:52 -08:00
Robert Griesemer
40621d5c0d remove semis after statements in one-statement statement lists
R=rsc, r
http://go/go-review/1025029
2009-11-09 12:07:39 -08:00
Robert Griesemer
368f8cbc75 - fine-tuning of one-line func heuristic (nodes.go)
- enabled for function declarations (not just function literals)
- applied gofmt -w $GOROOT/src
(look for instance at src/pkg/debug/elf/elf.go)

R=r, rsc
CC=go-dev
http://go/go-review/1026006
2009-11-06 14:24:38 -08:00
Robert Griesemer
7df45566db gofmt-ify image
R=rsc
http://go/go-review/1017044
2009-11-04 22:52:28 -08:00
Russ Cox
d2829faa7c files that are okay from the last gofmt round
R=gri
http://go/go-review/1015011
2009-10-27 22:47:54 -07:00
Nigel Tao
cb1ad7e765 Documentation for png.Decode and png.Encode.
R=r,rsc
APPROVED=r
DELTA=7  (5 added, 0 deleted, 2 changed)
OCL=35651
CL=35692
2009-10-13 17:14:49 -07:00
Nigel Tao
64145109b3 PNG encoder now filters.
R=r,rsc
APPROVED=r
DELTA=122  (102 added, 0 deleted, 20 changed)
OCL=35573
CL=35587
2009-10-11 19:36:29 -07:00
Nigel Tao
6e4f935369 In the PNG reader inner loop, collapse the two ReadFull calls into one.
R=rsc,r
APPROVED=rsc
DELTA=29  (2 added, 4 deleted, 23 changed)
OCL=35460
CL=35565
2009-10-09 22:44:40 -07:00
Russ Cox
094f1d5990 more lgtm files from gofmt
R=gri
OCL=35485
CL=35488
2009-10-08 15:14:54 -07:00
Nigel Tao
093af4e512 PNG encoder unit test.
R=rsc,r
APPROVED=r
DELTA=84  (77 added, 6 deleted, 1 changed)
OCL=35456
CL=35458
2009-10-07 23:14:23 -07:00
Russ Cox
c2ec9583a0 apply gofmt to go, gob, hash, http, image, io, json, log
R=gri
DELTA=1359  (138 added, 32 deleted, 1189 changed)
OCL=35408
CL=35420
2009-10-06 19:41:51 -07:00
Nigel Tao
f2d2e113be First cut at a PNG encoder.
TODOs include filtering, and a unit test.

R=rsc
APPROVED=r
DELTA=280  (249 added, 1 deleted, 30 changed)
OCL=35262
CL=35348
2009-10-05 17:34:15 -07:00
Russ Cox
27969e87cf add required conversions; bug in compiler let it slip through
R=r
DELTA=2  (0 added, 0 deleted, 2 changed)
OCL=34860
CL=34864
2009-09-21 15:44:10 -07:00
Nigel Tao
11e313ae72 Unit tests for image/png, based off the semi-official pngsuite from
libpng.org.

R=rsc
APPROVED=r
DELTA=1176  (1175 added, 1 deleted, 0 changed)
OCL=34727
CL=34838
2009-09-20 19:08:03 -07:00
Russ Cox
ca6a0fee1b more "declared and not used".
the last round omitted := range and only
checked 1 out of N vars in a multi-var :=

R=r
OCL=34624
CL=34638
2009-09-15 09:41:59 -07:00
Nigel Tao
8a0cb9302f When decoding a paletted PNG, require that a PLTE chunk is seen before
the first IDAT chunk.

R=rsc
APPROVED=rsc
DELTA=7  (2 added, 0 deleted, 5 changed)
OCL=34583
CL=34585
2009-09-13 21:47:54 -07:00
Nigel Tao
70eef675d5 PNG decoder for go.
R=rsc
APPROVED=r
DELTA=694  (675 added, 3 deleted, 16 changed)
OCL=34427
CL=34554
2009-09-10 21:33:44 -07:00