gdkraus/color-contrast-chrome

Color Contrast Analyzer Extension for Google Chrome

color-contrast-chrome's Issues

Heavy memory load, crashes MBP with kernel panics and/or Chrome hangs

Love this but tends to bug out when checking this page:
https://online-sit.agriculture.gov.au/auth/faces/createAccount

MacBook Pro (15-inch, 2017)
16 GB RAM
Video: Radeon Pro 560 4 GB
Intel HD Graphics 630 1536 MB

Chrome Version 88.0.4324.96 (Official Build) (x86_64)

Capturing a page region doesn't work when scrolling down

When scrolling down a page and choosing to capture a region of the page, it's only possible in the area that's displayed initially without scrolling.

While capturing the full page still is possible, together with the Capture Page Region is ignoring devicePixelRatio problem it's a very time consuming process.

I really love this tool and use it daily, so please fix these problems.

Capture Page Region is ignoring devicePixelRatio

When capturing a page region, the devicePixelRatio is being ignored. For example, on a retina display (devicePixelRatio == 2), the captured region bounds are exactly half the correct width, half the correct height, and positioned at half the correct x/y coordinates. Most browsers expose devicePixelRatio as a standard property of the window so this information should be easily determined.

This devicePixelRatio problem also manifests when rendering the other capture method results. It will display the processed image at twice the correct size (when devicePixelRatio is 2).

Unchecked runtime.lastError: The message port closed before a response was received.

Upon load of ANY website, if Color Contrast Analyzer plugin is enabled, the Chrome Debug console shows the following error:

Unchecked runtime.lastError: The message port closed before a response was received.

This error goes away if you disable the Color Contrast Analyzer plugin, and refresh the website tested.

Tested on:
Macbook Pro macOS Mojave 10.14.4
Google Chrome Version 74.0.3729.131 (Official Build) (64-bit)

show failures rather than successes

In order to emphasize the failures, highlight the places a page fails. This will probably necessitate filtering out pixel differences where the ratio is 0, like for solid background colors.

See comment on http://accessibility.oit.ncsu.edu/blog/2013/10/29/color-contrast-analyzer-for-chrome-text-in-images-gradients-pdfs-and-more/#comment-253508

The accessibility.oit.ncsu.edu site is giving 403s

May not be the best place to report this but getting 403s from the URL:
http://accessibility.oit.ncsu.edu/tools/color-contrast-chrome/