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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 screen
brightness = window.screen.moz
brightness; 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 lockminimum
brightness(in unsigned long
brightness); void unlockminimum
brightness(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_mon
brightnessdown (0x1008ff03) qt::key_mon
brightnessdown (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.update
brightness = function update
brightness(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.moz
brightness 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.
Linear-gradient Generator - 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("images/picker_mask.png"); 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%, rgba(255, 255, 255, 0) 100%); background: -ms-line...
...utput .value { width: 88%; position: absolute; white-space: pre; word-wrap: break-word; display: block; right: 0; } javascript content var uicolorpicker = (function uicolorpicker() { 'use strict'; 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...
backdrop-filter - CSS: Cascading Style Sheets
/* keyword value */ backdrop-filter: none; /* url to svg filter */ backdrop-filter: url(commonfilters.svg#filter); /* <filter-function> values */ backdrop-filter: blur(2px); backdrop-filter:
brightness(60%); backdrop-filter: contrast(40%); backdrop-filter: drop-shadow(4px 4px 10px blue); backdrop-filter: grayscale(30%); backdrop-filter: hue-rotate(120deg); backdrop-filter: invert(70%); backdrop-filter: opacity(20%); backdrop-filter: sepia(90%); backdrop-filter: saturate(80%); /* multiple filters */ backdrop-filter: url(filters.svg#filter) blur(4px) saturate(150%); /* global values */ backdrop...
... formal definition initial valuenoneapplies toall elements; in svg, it applies to container elements excluding the defs element and all graphics elementsinheritednocomputed valueas specifiedanimation typea filter function list formal syntax none | <filter-function-list>where <filter-function-list> = [ <filter-function> | <url> ]+where <filter-function> = <blur()> | <
brightness()> | <contrast()> | <drop-shadow()> | <grayscale()> | <hue-rotate()> | <invert()> | <opacity()> | <saturate()> | <sepia()>where <blur()> = blur( <length> )<
brightness()> =
brightness( <number-percentage> )<contrast()> = contrast( [ <number-percentage> ] )<drop-shadow()> = drop-shadow( <length>{2,3} <color>?
Links and Resources
color contrast analyzer by juicy studio: an excellent tool for checking if webpages use/have sufficient color contrast, sufficient
brightness difference by comparing background and foreground (text) colors.
Index - Firefox Developer Tools
by default, on some macs, the function key is remapped to use a special feature: for example, to change the screen
brightness or the volume.
DeviceLightEvent - 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.
Box-shadow generator - CSS: Cascading Style Sheets
.a; this.hue = obj.hue; this.saturation = obj.saturation; this.value = obj.value; } color.prototype.setrgba = function setrgba(red, green, blue, alpha) { if (red != undefined) this.r = red | 0; if (green != undefined) this.g = green | 0; if (blue != undefined) this.b = blue | 0; if (alpha != undefined) this.a = alpha | 0; } /** * hsv/hsb (hue, saturation, value /
brightness) * @param hue 0-360 * @param saturation 0-100 * @param value 0-100 */ color.prototype.sethsv = function sethsv(hue, saturation, value) { this.hue = hue; this.saturation = saturation; this.value = value; this.updatergb(); } color.prototype.updatergb = function updatergb() { var sat = this.saturation / 100; var value = this.value / 100; var c = sat * value; var h = t...
CSS reference - CSS: Cascading Style Sheets
lorborder-left-styleborder-left-widthborder-radiusborder-rightborder-right-colorborder-right-styleborder-right-widthborder-spacingborder-start-end-radiusborder-start-start-radiusborder-styleborder-topborder-top-colorborder-top-left-radiusborder-top-right-radiusborder-top-styleborder-top-widthborder-widthbottom@bottom-centerbox-decoration-breakbox-shadowbox-sizingbreak-afterbreak-beforebreak-inside
brightness()ccalc()caption-sidecaret-colorch@character-variantcharacter-variant()@charset:checkedcircle()clamp()clearclipclip-pathcm<color>colorcolor-adjustcolumn-countcolumn-fillcolumn-gapcolumn-rulecolumn-rule-colorcolumn-rule-stylecolumn-rule-widthcolumn-spancolumn-widthcolumnsconic-gradient()containcontentcontrast()<counter>counter-incrementcounter-resetcounter-set@counter-stylecounters()cross-fade()cub...