- From: Alan Gresley <alan@css-class.com>
- Date: Mon, 30 Aug 2010 23:54:36 +1000
- To: fantasai <fantasai.lists@inkedblade.net>
- CC: "Tab Atkins Jr." <jackalmage@gmail.com>, Boris Zbarsky <bzbarsky@mit.edu>, www-style list <www-style@w3.org>
Alan Gresley wrote: [snip] >> The grayish band in the middle of the gradient is roughly the same as >> the midway point between yellow and white / black in the >> 3d-color-prism. It would actually be half the value in intensity. [snip] In other words, the midway point of this gradient, <div style="background:-moz-linear-gradient(left, yellow, transparent)"></div> is the same as this opaque color. <div style="background:#808000;opacity:0.5;"></div> I believe Boris is correct in the mathematics. Tab, regarding your thoughts on bugzilla [1]. | Let me know if the term "sRGBA space" is nonsensical, and | I'll split out the color and opacity language explicitly If I am somewhat correct in terminology and vectors, what we have in the gradient [2] is vector running from yellow to a midway point of the vector between white and black in sRGA space [3] [4] that reduces in opacity from 1 to 0, and I think operating like a scaler field. 1. <https://bugzilla.mozilla.org/show_bug.cgi?id=591600> 2. <http://en.wikipedia.org/wiki/Gradient_vector> 3. <http://en.wikipedia.org/wiki/SRGB> 4. <http://commons.wikimedia.org/wiki/File:RGB_color_solid_cube.png> 5. <http://en.wikipedia.org/wiki/Scalar_(mathematics)> -- Alan http://css-class.com/ Armies Cannot Stop An Idea Whose Time Has Come. - Victor Hugo
Received on Monday, 30 August 2010 13:55:13 UTC