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Nigel Tao ab2ea94c60 image: change the YCbCr image's pixel buffers to start at Rect.Min 
instead of the origin.

This makes YCbCr match the other image types (e.g. RGBA, Gray) in
that an image's bounds is not restricted to the positive quadrant.

Also optimize the YCbCr draw code by hoisting some computation
outside of the loop.

benchmark              old ns/op    new ns/op    delta
draw.BenchmarkYCbCr      2544418      2373558   -6.72%

Like https://golang.org/cl/4681044/ I don't think a gofix is
feasible. People will have to make manual changes. On the other hand,
directly manipulating YCbCr images is relatively rare, compared to
RGBA images, and if other code just uses the jpeg and draw packages
instead of messing directly with a YCbCr's []byte representations,
then things should just continue to work.

R=r
CC=golang-dev
https://golang.org/cl/5558048
 		2012-01-20 10:44:22 +11:00
doc godoc: support canonical Paths in HTML metadata 2012-01-20 07:37:36 +11:00
include os: OS-dependent bits to support NetBSD. 2011-12-15 12:19:19 -05:00
lib godoc: add anchors to cmd documentation headings 2012-01-19 18:59:06 +11:00
misc go/doc: streamlined go/doc API 2012-01-12 17:36:57 -08:00
src image: change the YCbCr image's pixel buffers to start at Rect.Min 2012-01-20 10:44:22 +11:00
test test: split golden.out into expected output per test 2012-01-18 16:12:24 -08:00
.hgignore .hgignore: ignore autogenerated files 2011-12-20 15:54:39 -05:00
.hgtags tag weekly.2012-01-15 2012-01-16 09:52:35 +11:00
AUTHORS A+C: add Stefan Nilsson's gmail account 2012-01-19 14:44:21 +11:00
CONTRIBUTORS A+C: add Stefan Nilsson's gmail account 2012-01-19 14:44:21 +11:00
LICENSE LICENSE: separate, change PATENTS text 2010-12-06 16:31:59 -05:00
PATENTS LICENSE: separate, change PATENTS text 2010-12-06 16:31:59 -05:00
README build: update, streamline documentation for new $GOBIN 2010-08-24 20:00:50 -04:00
favicon.ico add a favicon plus a couple of hi-res versions of gordon 2009-10-26 10:13:07 -07:00
robots.txt godoc: serve robots.txt raw 2011-02-19 05:46:20 +11:00

README 

This is the source code repository for the Go programming language.  

For documentation about how to install and use Go,
visit http://golang.org/ or load doc/install.html in your web browser.

After installing Go, you can view a nicely formatted
doc/install.html by running godoc --http=:6060
and then visiting http://localhost:6060/doc/install.html.

Unless otherwise noted, the Go source files are distributed
under the BSD-style license found in the LICENSE file.

--

Binary Distribution Notes

If you have just untarred a binary Go distribution, you need to set
the environment variable $GOROOT to the full path of the go
directory (the one containing this README).  You can omit the
variable if you unpack it into /usr/local/go, or if you rebuild
from sources by running all.bash (see doc/install.html).
You should also add the Go binary directory $GOROOT/bin
to your shell's path.

For example, if you extracted the tar file into $HOME/go, you might
put the following in your .profile:

    export GOROOT=$HOME/go
    export PATH=$PATH:$GOROOT/bin

See doc/install.html for more details.