View source for Colour Management Tests

== Colour Management Tests ==

== Project Description ==

Write reftests to compare images in order to deal with floating point tolerance. This includes dealing with things like Monitor Profiles, profiles in JPEG (i.e., JPEGs get changed based on colour profile info). See discussion of colour profiles in Firefox 3 here. It would be useful to be able to compare to PNGs with a reftest, perhaps creating an image diff tool, where pixels outside a floating point tolerance (> 0.n) would somehow be highlighted so you can see what is different. Done.

This will require some graphics and image knowledge (i.e., Photoshop, what colour is on a computer, etc).

== Project Leader(s) ==

[[user:Evmarbella|Ezadkiel Villarico Marbella]]
[http://zadkielm.blogspot.com/search/label/reftest Project Blog]

== Project Contributor(s) ==

Name(s) of people casually working on the project, or who have contributed significant help.  Include links to personal pages within wiki

NOTE: only Project Leader(s) should add names here.  You '''can’t''' add your own name to the Contributor list.

== Project Details ==

[http://mxr.mozilla.org/mozilla/source/layout/tools/reftest/README.txt REFTEST READ ME]

'''TechNote001:'''
Reftest framework contains image rendering 
reftests in module/libpr0n/test/reftest
inside the mozilla source.

'''Technote002:'''
You must enable colour management you must 
go to your about:config and search for 
gfx.color_management.mode and switch it to 1

'''Technote003:'''
What are ways to embed colour profiles into images?
Photoshop does it.

'''Technote004:'''
Create Images with sRGB colour profile embedded.

'''Technote005:'''
Tricky bit on rendering to get the firefox 
rendering back as an image.

'''Technote006:'''
A way to do this Draw the image into a canvas
http://developer.mozilla.org/En/Canvas_tutorial:Using_images
Then call toDataURL or getPixelData to get the pixels out.
It doesn't reverse-colour-correct the data read from canvas 
methods which is incorrect, but useful. Reftests already 
give a data URL when the test fails.

''toDataURL:''

http://cow.neondragon.net/index.php/681-Canvas-Todataurl
http://developer.mozilla.org/En/Code_snippets/Canvas

''getPixelData:''

no information


'''Technote007:''' Use URI scheme for reftest [http://en.wikipedia.org/wiki/Data:_URI_scheme DATA URI Scheme Wiki] 


'''Techtool001:''' layout/tools/reftest/reftest-to-html.pl

'''Techtool002:'''<br /> [http://software.hixie.ch/utilities/cgi/data/data URI kitchen] [http://www.scalora.org/projects/uriencoder/ URI Encoder]

simple to complex.  

'''Testing GOAL001:'''
simple to complex.  <br />
For example <br />
(a) colors x000000 and xFFFFFF, <br />
(b) then do the primary colors, <br />
(c) then complimentary colors, <br />
(d) then get into things like alpha values <br />
(e) and color blending.  <br />

'''Focus 001'''<br />
focus on getting together<br />
various profiles and<br />
various images,<br />
creating tagged and<br />
untagged ones <br />
that should look the same,<br />

and then plugging those into the reftest framework. <br />

== Project News ==

- Sept 19/08

made some builds with --enabled-tests

learning how to make [http://zadkielm.blogspot.com/2008/09/firefox-and-reference-testing-reftest.html reftests].

reading over notes etc.

- Sept 20/08

made more updates to notes and project page.

- Sept 22/08

Got a response from an email...one step closer to putting these pieces together.

Got some Goals...and Focus.