Screen.mozBrightness - Web APIs
indicates how bright the screen's backlight is, on a scale from 0 (very dim) to 1 (full brightness); this value is a double-precision float.
...most screens don't support as many different brightness levels as there are doubles between 0 and 1.
... syntax let screenbrightness = window.screen.mozbrightness; specifications not part of specification.

brightness() - CSS: Cascading Style Sheets
the brightness() css function applies a linear multiplier to the input image, making it appear brighter or darker.
... syntax brightness(amount) parameters amount the brightness of the result, specified as a <number> or a <percentage>.
... examples setting brightness using numbers and percentages brightness(0%) /* completely black */ brightness(0.4) /* 40% brightness */ brightness(1) /* no effect */ brightness(200%) /* double brightness */ specifications specification status filter effects module level 1the definition of 'brightness()' in that specification.

Lighting a WebXR setting - Web APIs
components of a light source a light source has three major components; each component is in essence a type of light there are three kinds of light that can affect the color and brightness of objects and their pixels as displayed on the viewer's screen or headset.
... because the intensity of diffuse light depends on the angle of incidence (the angle between the vector representing the direction from which the light reaches the surface and the surface's normal vector or the vector perpendicular to the surface), the intensity or brightness of the light reflected by an object varies depending on the surface's orientation relative to the light source.
...the webgl shader program takes the color, directionality, brightness, and other factors for each light source and computes the final color of each pixel.
...And 7 more matches

nsIScreen
nted by: @mozilla.org/gfx/screenmanager;1 as a service: var screen = components.classes["@mozilla.org/gfx/screenmanager;1"] .getservice(components.interfaces.nsiscreen); method overview void getavailrect(out long left, out long top, out long width, out long height); void getrect(out long left, out long top, out long width, out long height); void lockminimumbrightness(in unsigned long brightness); void unlockminimumbrightness(in unsigned long brightness); attributes attribute type description colordepth long the screen's color depth; this is the number of bits used to represent a color.
... constants screen brightness constants constant value description brightness_dim 0 the screen is fully dimmed (that is, off).
... brightness_full 1 the screen is at full brightness.
...And 6 more matches

Key Values - Web APIs
device keys keyboardevent.key value description virtual keycode windows mac linux android "brightnessdown" the brightness down key.
... typically used to reduce the brightness of the display.
... gdk_key_monbrightnessdown (0x1008ff03) qt::key_monbrightnessdown (0x010000b3) keycode_brightness_down (220) "brightnessup" the brightness up key.
...And 5 more matches

filter - CSS: Cascading Style Sheets
syntax /* url to svg filter */ filter: url("filters.svg#filter-id"); /* <filter-function> values */ filter: blur(5px); filter: brightness(0.4); filter: contrast(200%); filter: drop-shadow(16px 16px 20px blue); filter: grayscale(50%); filter: hue-rotate(90deg); filter: invert(75%); filter: opacity(25%); filter: saturate(30%); filter: sepia(60%); /* multiple filters */ filter: contrast(175%) brightness(3%); /* use no filter */ filter: none; /* global values */ filter: inherit; filter: initial; filter: unset; with a function, use...
...d-table td { padding: 5px; border: 1px solid rgb(204, 204, 204); text-align: left; vertical-align: top; width:25%; height:auto; } #img3 { height:100%; } <svg style="position: absolute; top: -99999px" xmlns="http://www.w3.org/2000/svg"> <filter id="svgblur" x="-5%" y="-5%" width="110%" height="110%"> <fegaussianblur in="sourcegraphic" stddeviation="5"/> </filter> </svg> brightness() the brightness() function applies a linear multiplier to the input image, making it appear more or less bright.
... filter: brightness(2) <svg style="position: absolute; top: -99999px" xmlns="http://www.w3.org/2000/svg"> <filter id="brightness"> <fecomponenttransfer> <fefuncr type="linear" slope="[amount]"/> <fefuncg type="linear" slope="[amount]"/> <fefuncb type="linear" slope="[amount]"/> </fecomponenttransfer> </filter> </svg> <table class="standard-table"> <thead> <tr> <th style="text-align: left;" scope="col">original image</th> <th style="text-align: left;" scope="col">live example</th> ...
...And 5 more matches

Web Accessibility: Understanding Colors and Luminance - Accessibility
see the stack exchange article, "formula to determine the brightness of rgb color".
... here is the definition of relative luminance as defined by the w3c: "the relative brightness of any point in a colorspace, normalized to 0 for darkest black and 1 for lightest white" this statement is of course accurate, but may be confusing when used in reference to the rgb color space, which is an integer between 0 and 255.
... saturation is not brightness.
...And 4 more matches

Color picker tool - CSS: Cascading Style Sheets
; background-color: #fff; display: table; -moz-user-select: none; -webkit-user-select: none; -ms-user-select: none; user-select: none; } .ui-color-picker .picking-area { width: 198px; height: 198px; margin: 5px; border: 1px solid #ddd; position: relative; float: left; display: table; } .ui-color-picker .picking-area:hover { cursor: default; } /* hsv format - hue-saturation-value(brightness) */ .ui-color-picker .picking-area { background: url('https://mdn.mozillademos.org/files/5707/picker_mask_200.png') center center; background: -moz-linear-gradient(bottom, #000 0%, rgba(0, 0, 0, 0) 100%), -moz-linear-gradient(left, #fff 0%, rgba(255, 255, 255, 0) 100%); background: -webkit-linear-gradient(bottom, #000 0%, rgba(0, 0, 0, 0) 100%), -webkit-linear-gradient(left, #fff 0%, ...
...px; color: #777; } #zindex .ui-input-slider-info { width: 60px; } #zindex[data-active='true'] { top: 0; opacity: 1; } javascript content 'use strict'; var uicolorpicker = (function uicolorpicker() { function getelembyid(id) { return document.getelementbyid(id); } var subscribers = []; var pickers = []; /** * rgba color class * * hsv/hsb and hsl (hue, saturation, value / brightness, lightness) * @param hue 0-360 * @param saturation 0-100 * @param value 0-100 * @param lightness 0-100 */ function color(color) { if(color instanceof color === true) { this.copy(color); return; } this.r = 0; this.g = 0; this.b = 0; this.a = 1; this.hue = 0; this.saturation = 0; this.value = 0; this.lightness = 0; this.format = 'hsv'; } function rg...
...sample.prototype.updatelightness = function updatelightness(color, value, steps) { var lightness = color.lightness + value * steps; if (lightness <= 0) { this.node.setattribute('data-hidden', 'true'); return; } this.node.removeattribute('data-hidden'); this.color.copy(color); this.color.setlightness(lightness); this.updatebgcolor(); }; colorsample.prototype.updatebrightness = function updatebrightness(color, value, steps) { var brightness = color.value + value * steps; if (brightness <= 0) { this.node.setattribute('data-hidden', 'true'); return; } this.node.removeattribute('data-hidden'); this.color.copy(color); this.color.setvalue(brightness); this.updatebgcolor(); }; colorsample.prototype.updatealpha = function updatealpha(color, ...
...And 2 more matches

Image file type and format guide - Web media technologies
browser compatibility chrome 59, edge 12, firefox 3, opera 46, safari 8 maximum dimensions 2,147,483,647×2,147,483,647 pixels supported color modes color mode bits per component (d) description greyscale 1, 2, 4, 8, and 16 each pixel consists of a single d-bit value indicating the brightness of the greyscale pixel.
... icons in png format color mode bits per component (d) description greyscale 1, 2, 4, 8, and 16 each pixel consists of a single d-bit value indicating the brightness of the greyscale pixel.
... 1 broken 3.5.1 no maximum dimensions 2,147,483,647×2,147,483,647 pixels supported color modes color mode bits per component (d) description greyscale 1, 2, 4, 8, and 16 each pixel consists of a single d-bit value indicating the brightness of the greyscale pixel.
... greyscale 4 and 8 each pixel consists of a single d-bit value indicating the brightness of the greyscale pixel.

Accessibility Information for Web Authors - Accessibility
legibility problems how can a web author establish easily and quickly if the background color and foreground (text) color in use in his webpages have sufficient color contrast difference and sufficient color brightness difference?
...effective color contrast and effective color brightness difference have a decisive importance for reading, furthermore for people with partial color deficiency (see the excellent examples in effective color contrast by lighthouse international).
... the juicy studio css analyzer will also analyze and report the color contrast and color brightness differences involved in your stylesheets.

<filter-function> - CSS: Cascading Style Sheets
brightness() makes the image brighter or darker.
... html <div></div> <ul> <li> <label for="filter-select">choose a filter function:</label> <select id="filter-select"> <option selected>blur</option> <option>brightness</option> <option>contrast</option> <option>drop-shadow</option> <option>grayscale</option> <option>hue-rotate</option> <option>invert</option> <option>opacity</option> <option>saturate</option> <option>sepia</option> </select> </li> <li> <input type="range"><output></output> </li> <li> <p>current value: <code></code></p> </li> ...
...code'); selectelem.addeventlistener('change', () => { setslider(selectelem.value); setdiv(selectelem.value); }); slider.addeventlistener('input', () => { setdiv(selectelem.value); }); function setslider(filter) { if(filter === 'blur') { slider.value = 0; slider.min = 0; slider.max = 30; slider.step = 1; slider.setattribute('data-unit', 'px'); } else if(filter === 'brightness' || filter === 'contrast' || filter === 'saturate') { slider.value = 1; slider.min = 0; slider.max = 4; slider.step = 0.05; slider.setattribute('data-unit', ''); } else if(filter === 'drop-shadow') { slider.value = 0; slider.min = -20; slider.max = 40; slider.step = 1; slider.setattribute('data-unit', 'px'); } else if(filter === 'opacity') { slider.

Index - Web APIs
for example this may be useful to adjust the screen's brightness based on the current ambient light level in order to save energy or provide better readability.
... 3857 screen.mozbrightness api, api:mozilla extensions, deprecated, non-standard, property indicates how bright the screen's backlight is, on a scale from 0 (very dim) to 1 (full brightness); this value is a double-precision float.

XREnvironmentBlendMode - Web APIs
additive primarily used by ar devices with transparent lenses which directly allow reality to pass through to the user's eyes, the additive blending mode is designed to be used in a situation in which the device has no control over the background and its brightness, since that isn't being digitally controlled.
...since the real world is being digitally presented, the brightness of each pixel can be controlled, whether it's reality or the rendered xr image, the user's environment can be blended with the virtual environment with each pixel having its color and brightness precisely controlled.

XRSession.environmentBlendMode - Web APIs
additive primarily used by ar devices with transparent lenses which directly allow reality to pass through to the user's eyes, the additive blending mode is designed to be used in a situation in which the device has no control over the background and its brightness, since that isn't being digitally controlled.
...since the real world is being digitally presented, the brightness of each pixel can be controlled, whether it's reality or the rendered xr image, the user's environment can be blended with the virtual environment with each pixel having its color and brightness precisely controlled.

Accessibility and Spacial Patterns - Accessibility
if so, does the brightness exceed the stated limit?
... if so, reduce brightness.