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Session 06 - CSS and Image

Harvard University Extension School
Fall 2017

Course Web Site: http://cscie12.dce.harvard.edu/

Instructor email: david_heitmeyer@harvard.edu
Course staff email: cscie12@dce.harvard.edu

Topics

  1. Display and Visibility
  2. CSS and Lists for Navigation
  3. Lists as Side Navigation
  4. Dropdown Menus
  5. Breadcrumb Navigation
  6. CSS Rounded Borders
  7. CSS Shadows
  8. CSS Gradients
  9. Graphics and Images
  10. JPEG
  11. GIF
  12. PNG
  13. SVG
  14. Comparison of Image Formats
  15. Working with Images

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Display and Visibility

Can use CSS to change display. This is useful not only to change the 'default' way things are displayed, but also to manipulate display properties using JavaScript.

Two main properties that control display:

The "display" property

Common values:

display: inline

list

Key points:

ul { list-style: none; }
li { display: inline; }

display: none

Example 6.1 - display: none; - Example 6.1 (Without Styles) | 
 <ul>
<li>American League<ul>
<li id="ale">East<ul>
<li>Baltimore</li>
<li>Boston</li>
<li>New York</li>
<li>Toronto</li>
<li>Tampa Bay</li>
</ul></li>
<li id="alc">Central<ul>
<li>Chicago</li>
<li>Cleveland</li>
<li>Detroit</li>
<li>Kansas City</li>
<li>Minnesota</li>
</ul></li>
<li id="alw">West<ul>
<li>Los Angeles</li>
<li>Oakland</li>
<li>Texas</li>
<li>Seattle</li>
</ul></li>
</ul></li>
</ul>

In style element (<style type="text/css">) within head element: 


#ale { display: none; }
#alw { display: none; }
* { font-family: arial,helvetica,sans-serif; }
 

display

Full list for the American League:
display

Visibility

Visibility controls whether or not an element is displayed. The element still takes up space in the block model.

Example 6.2 - visibility: hidden; - Example 6.2 (Without Styles) | 
 <ul>
<li>American League<ul>
<li id="ale">East<ul>
<li>Baltimore</li>
<li>Boston</li>
<li>New York</li>
<li>Toronto</li>
<li>Tampa Bay</li>
</ul></li>
<li id="alc">Central<ul>
<li>Chicago</li>
<li>Cleveland</li>
<li>Detroit</li>
<li>Kansas City</li>
<li>Minnesota</li>
</ul></li>
<li id="alw">West<ul>
<li>Los Angeles</li>
<li>Oakland</li>
<li>Texas</li>
<li>Seattle</li>
</ul></li>
</ul></li>
</ul>

In style element (<style type="text/css">) within head element: 


#ale { visibility: hidden; }
#alw { visibility: hidden; }
* { font-family: arial,helvetica,sans-serif; }
 

display

Full list for the American League:
display

display: inline-block

Remember how we saw we can float things?
display: inline-block gives us another way to achieve similar results -- but with inline-block, the contents are not taken out of the calculation of the parent container!

inline-block

Compare the two JSFiddle examples of li:

CSS and Lists for Navigation

Harvard Homepage - lists are outlined in magenta and list items in green. Note that some lists are "horizontal" and some are "vertical" -- exactly how a list is rendered can be controlled by CSS

Top:
harvard home page with lists and list items highlighted

Footer:
harvard home page with lists and list items highlighted

Lists and Navigation

Harvard Extension School
Harvard Extension School Navigation

Inline and Inline-block Lists

list

Key points:

ul { list-style: none; }
li { display: inline; }

or 

ul { list-style: none; }
li { display: inline-block; }

list-style: none

Example 6.3 - list-style: none; - Example 6.3 (Without Styles) | 
<ul id="extglobalnav">
<li>About</li>
<li>Calendar</li>
<li>Courses</li>
<li>Contact Us</li>
<li>Faculty Directory</li>
<li>Login</li>
</ul>

In style element (<style type="text/css">) within head element: 

ul#extglobalnav {
  list-style: none;
}
 

list

li {display: inline;}

Example 6.4 - list-style: none; - Example 6.4 (Without Styles) | 
<ul id="extglobalnav">
<li>About</li>
<li>Calendar</li>
<li>Courses</li>
<li>Contact Us</li>
<li>Faculty Directory</li>
<li>Login</li>
</ul>

In style element (<style type="text/css">) within head element: 

ul#extglobalnav {
  list-style: none;
  padding-left: 0;
}
ul#extglobalnav li {
  display: inline;
  padding-left: 2em;
}
 

list

li {display: inline-block;}

Example 6.5 - list-style: none; - Example 6.5 (Without Styles) | 
<ul id="extglobalnav">
<li>About</li>
<li>Calendar</li>
<li>Courses</li>
<li>Contact Us</li>
<li>Faculty Directory</li>
<li>Login</li>
</ul>

In style element (<style type="text/css">) within head element: 

ul#extglobalnav {
  list-style: none;
  padding-left: 0;
}
ul#extglobalnav li {
  display: inline-block;
  width: 8em;
  border: thin solid black;
  margin-right: 3px;
  text-align: center
}
 

list

Advantage of inline-block?

Best of both "inline" and "block" worlds!

Lists as Horizontal Navigation

lists

Key points:

Example 6.6 - simple list - Example 6.6 | 
<ul>
<li>Academics</li>
<li>Tuition and Enrollment</li>
<li>Resources and Policies</li>
<li>Inside Extension</li>
</ul>
  • Academics
  • Tuition and Enrollment
  • Resources and Policies
  • Inside Extension
 
Example 6.7 - inline list items - Example 6.7 (Without Styles) | 
<ul id="extnav">
<li>Academics</li>
<li>Tuition and Enrollment</li>
<li>Resources and Policies</li>
<li>Inside Extension</li>
</ul>

In style element (<style type="text/css">) within head element: 

ul#extnav {
  list-style: none;
}
ul#extnav li {
  display: inline-block;
}
 

inline list items

Note the labeling of the current area of the site the user is in with the "active" class.

Example 6.8 - Inline List Items - Example 6.8 (Without Styles) | 
<ul id="extnav">
<li><a href="#">Academics</a></li>
<li class="active"><a href="#">Tuition and Enrollment</a></li>
<li><a href="#">Resources and Policies</a></li>
<li><a href="#">Inside Extension</a></li>
</ul>

In head element: 

<link rel="stylesheet" type="text/css" href="example8.css"/>

In example8.css

* {
  background-color: white;
}

ul#extnav {
  list-style: none;
  font-weight: bold;
  font-family: Arial, Verdana, Helvetica, sans-serif;
  color: #1e1e1e;
  background-color: white;
  margin-top: 1em;
}

ul#extnav li {
  display: inline-block;
  margin: 0;
  padding: 0;
}

ul#extnav a {
  padding: 0.5em;
  margin-right: 0;
  background-color: white;
  border-right: 1px solid black;
}
ul#extnav li:last-child a {
  border-style: none;
}
ul#extnav a:link,
ul#extnav a:visited {
  color: black;
  text-decoration: none;
}

ul#extnav a:hover {
  color: #a51c30;
  text-decoration: underline;
}
ul#extnav .active {  background-color: #f5f5f8;}
ul#extnav .active a:link,
ul#extnav .active a:visited,
ul#extnav .active a:hover,
ul#extnav .active a:active {
  background-color: #f5f5f8;
  color: #a51c30;
  text-decoration: none;
}
 

list

Lists as Side Navigation

Key points:

Default styling:
navigation lists

Note: "a" display property is set to "block". This makes the hyperlink active over the whole area, not just with the text.

Example 6.9 - lists as navigation - Example 6.9 (Without Styles) | 
<div id="navigation1"><ul>
<li><a href="http://www.baylor.edu/">Baylor</a></li>
<li><a href="http://www.iastate.edu/">Iowa State</a></li>
<li><a href="http://www.ku.edu/">Kansas</a></li>
<li><a href="http://www.ksu.edu/">Kansas State</a></li>
<li><a href="http://www.ou.edu/">Oklahoma</a></li>
<li><a href="http://www.okstate.edu/">Oklahoma State</a></li>
<li><a href="http://www.tcu.edu/">Texas Christian</a></li>
<li><a href="http://www.utexas.edu/">Texas</a></li>
<li><a href="http://www.ttu.edu/">Texas Tech</a></li>
<li><a href="http://www.wvu.edu/">West Virginia</a></li>
</ul></div>

In head element: 

<link rel="stylesheet" type="text/css" href="example9.css"/>

In example9.css

#navigation1 {
  font-family: Arial, Verdana, Helvetica, sans-serif;
  font-weight: bold;
  font-size: 0.7em;
  width: 15em;
  border-right: 1px solid #333;
  margin-bottom: 1em;
  background-color: #ddd;
  color: #900;
}
#navigation1 ul { 
  list-style: none;
  margin: 0;
  padding: 0;
}
#navigation1 ul li { 
  margin: 0;
  border-top: 1px solid #333;
}
#navigation1 ul li a {
  display: block;
  background-color: #ddd;
  border-top: 1px solid #333;
  border-left: 5px solid #333;
  text-decoration: none;
  padding: 5px 2px 5px 0.5em;
}
#navigation1 ul li a:link,
#navigation1 ul li a:visited  
{ color: #900; }
#navigation1 ul li a:hover {
     color: #fff;
     background-color: #900;}
 

navigation lists

Lists as Navigation

Nested list styled as "clamshell" navigation.

  • styles for secondary nested lists (e.g. selector for ul ul a)
    • Example 6.10 - Nested lists for 'clamshell' navigation - Example 6.10 (Without Styles) | 
    <div id="navclam"><ul>
<li><a href="http://big12sports.collegesports.com/">Big XII</a><ul>
<li><a href="http://www.baylor.edu/">Baylor</a></li>
<li><a href="http://www.iastate.edu/">Iowa State</a></li>
<li><a href="http://www.ku.edu/">Kansas</a></li>
<li><a href="http://www.ksu.edu/">Kansas State</a></li>
<li><a href="http://www.ou.edu/">Oklahoma</a></li>
<li><a href="http://www.okstate.edu/">Oklahoma State</a></li>
<li><a href="http://www.tcu.edu/">Texas Christian</a></li>
<li><a href="http://www.utexas.edu/">Texas</a></li>
<li><a href="http://www.ttu.edu/">Texas Tech</a></li>
<li><a href="http://www.wvu.edu/">West Virginia</a></li>
</ul></li>
<li><a href="http://www.ivyleaguesports.com/">Ivy League</a><ul class="collapse">
<li><a href="http://www.brown.edu/">Brown</a></li>
<li><a href="http://www.columbia.edu/">Columbia</a></li>
<li><a href="http://www.cornell.edu/">Cornell</a></li>
<li><a href="http://www.dartmouth.edu/">Dartmouth</a></li>
<li><a href="http://www.harvard.edu/">Harvard</a></li>
<li><a href="http://www.upenn.edu/">Penn</a></li>
<li><a href="http://www.princeton.edu/">Princeton</a></li>
<li><a href="http://www.yale.edu/">Yale</a></li>
</ul></li>
<li><a href="http://www.pac-12.com/">Pac 12</a><ul class="collapse">
<li><a href="http://www.arizona.edu/">Arizona</a></li>
<li><a href="http://www.asu.edu/">Arizona State</a></li>
<li><a href="http://www.berkeley.edu/">California</a></li>
<li><a href="http://www.cu.edu/">Colorado</a></li>
<li><a href="http://www.uoregon.edu/">Oregon</a></li>
<li><a href="http://www.oregonstate.edu/">Oregon State</a></li>
<li><a href="http://www.stanford.edu/">Stanford</a></li>
<li><a href="http://www.ucla.edu/">UCLA</a></li>
<li><a href="http://www.usc.edu/">USC</a></li>
<li><a href="http://www.utah.edu/">Utah</a></li>
<li><a href="http://www.washington.edu/">Washington</a></li>
<li><a href="http://www.wsu.edu/">Washington State</a></li>
</ul></li>
</ul></div>

    In head element: 

    <link rel="stylesheet" type="text/css" href="example10.css"/>

    In example10.css

    #navclam {
  font-family: Arial, Verdana, Helvetica, sans-serif;
  font-weight: bold;
  font-size: 1.2em;
  width: 10em;
  border-right: 1px solid #333;
  margin-bottom: 1em;
  background-color: #ddd;
  color: #900;
}
#navclam ul { 
  list-style: none;
  margin: 0;
  padding: 0;
}
#navclam ul li { 
  margin: 0;
  border-top: 1px none #333;
}
#navclam ul li a {
  display: block;
  background-color: #ccc;
  border-top: 1px none #333;
  border-right: 1px solid #333;
  border-bottom: thin dotted #333;
  border-left: 5px solid #333;
  text-decoration: none;
  padding: 5px 2px 5px 0.5em;
}
#navclam a:link {
  color: #900;
}
#navclam a:visited {
  color: #900;
}
#navclam a:hover {
  color: #fff;
  background-color: #900;
  border-top: 1px outset #333;
  border-right: 1px outset #333;
  border-bottom: 1px outset #333;
  border-left: 5px outset #333;
}
#navclam a:active {
  color: #fff;
  background-color: #900;
  border-top: 1px inset #333;
  border-right: 1px inset #333;
  border-bottom: 1px inset #333;
  border-left: 5px inset #333;
}
#navclam ul ul a { 
  list-style: none;
  padding-left: 1.5em;
  font-size: 90%;
  font-weight: normal;
}
#navclam ul.collapse { 
  display: none; 
}
     

    lists as navigation

    Default styling of nested list:
    lists as navigation

    Dropdown Menus

    Key points:

    American League dropdown

    Example 6.11 - drop down menu - Example 6.11 (Without Styles) | 
     <ul id="dropdown1">
<li><a href="#">AL East</a><ul>
<li><a href="#">Baltimore</a></li>
<li><a href="#">Boston</a></li>
<li><a href="#">New York</a></li>
<li><a href="#">Toronto</a></li>
<li><a href="#">Tampa Bay</a></li>
</ul></li>
<li><a href="#">AL Central</a><ul>
<li><a href="#">Chicago</a></li>
<li><a href="#">Cleveland</a></li>
<li><a href="#">Detroit</a></li>
<li><a href="#">Kansas City</a></li>
<li><a href="#">Minnesota</a></li>
</ul></li>
<li><a href="#">AL West</a><ul>
<li><a href="#">Los Angeles</a></li>
<li><a href="#">Oakland</a></li>
<li><a href="#">Texas</a></li>
<li><a href="#">Seattle</a></li>
</ul></li>
</ul>

    In style element (<style type="text/css">) within head element: 

    ul {
  padding: 0;
  margin: 0;
  list-style: none;
  }
li {
  float: left;
  position: relative;
  width: 10em;
  }
li ul {
  display: none;
  top: 1em;
  left: 0;
  }
li:hover ul { display: block; }
     

    Dropdown Menus

    Example 6.12 - drop-down menu - Example 6.12 (Without Styles) | 
     <ul id="dropdown2">
<li><a href="#">AL East</a><ul>
<li><a href="#">Baltimore</a></li>
<li><a href="#">Boston</a></li>
<li><a href="#">New York</a></li>
<li><a href="#">Toronto</a></li>
<li><a href="#">Tampa Bay</a></li>
</ul></li>
<li><a href="#">AL Central</a><ul>
<li><a href="#">Chicago</a></li>
<li><a href="#">Cleveland</a></li>
<li><a href="#">Detroit</a></li>
<li><a href="#">Kansas City</a></li>
<li><a href="#">Minnesota</a></li>
</ul></li>
<li><a href="#">AL West</a><ul>
<li><a href="#">Los Angeles</a></li>
<li><a href="#">Oakland</a></li>
<li><a href="#">Texas</a></li>
<li><a href="#">Seattle</a></li>
</ul></li>
</ul>

    In style element (<style type="text/css">) within head element: 

    ul {
  padding: 0;
  margin: 0;
  list-style: none;
  }
li {
  float: left;
  position: relative;
  width: 10em;
  }
li ul {
  display: none;
  top: 1.7em;
  left: 0;
}
li > ul {
  top: auto;
  left: auto;
}
li:hover ul { display: block; }
#dropdown2  li { 
  border: thin solid navy; 
  font-family: calibri,verdana,tahoma,helvetica,sans-serif;
  background-color: #ccf;
  }
#dropdown2 ul li { background-color: #eef; }
#dropdown2 a {display:block; padding: 0.25em;}
#dropdown2 a:link, 
#dropdown2 a:visited, 
#dropdown2 a:hover, 
#dropdown2 a:active 
  { text-decoration: none; font-weight: bold; }
#dropdown2 a:hover { background-color: navy; color: #ccf; }
     

    dropdown

    Dropdown Menus: Vertical

    dropdown

    Example 6.13 - drop-down/out menu - Example 6.13 (Without Styles) | 
     <ul id="dropdown3">
<li><a href="#">AL East</a><ul>
<li><a href="#">Baltimore</a></li>
<li><a href="#">Boston</a></li>
<li><a href="#">New York</a></li>
<li><a href="#">Toronto</a></li>
<li><a href="#">Tampa Bay</a></li>
</ul></li>
<li><a href="#">AL Central</a><ul>
<li><a href="#">Chicago</a></li>
<li><a href="#">Cleveland</a></li>
<li><a href="#">Detroit</a></li>
<li><a href="#">Kansas City</a></li>
<li><a href="#">Minnesota</a></li>
</ul></li>
<li><a href="#">AL West</a><ul>
<li><a href="#">Los Angeles</a></li>
<li><a href="#">Oakland</a></li>
<li><a href="#">Texas</a></li>
<li><a href="#">Seattle</a></li>
</ul></li>
</ul>

    In style element (<style type="text/css">) within head element: 

    ul {
  padding: 0;
  margin: 0;
  list-style: none;
  }
li {
  position: relative;
  width: 10em;
}
li ul {
  display: none;
  position: absolute; 
  top: 1.7em;
  left: 0;
}
li > ul {
  top: auto;
  left: auto;
}
li:hover ul { display: block; }

#dropdown3 li ul { 
  margin-left: 10em; 
  margin-top: -1.8em;
}
#dropdown3  li { 
  border: thin solid navy; 
  font-family: calibri,verdana,tahoma,helvetica,sans-serif;
  background-color: #ccf;
  }
#dropdown3 ul li { background-color: #eef; }
#dropdown3 a {display:block; padding: 0.25em;}
#dropdown3 a:link, 
#dropdown3 a:visited, 
#dropdown3 a:hover, 
#dropdown3 a:active 
  { text-decoration: none; font-weight: bold; }
#dropdown3 a:hover { background-color: navy; color: #ccf; }
     

    Breadcrumb Navigation

    "Just wait, Gretel, until the moon rises, and then we shall see the crumbs of bread which I have strewn about, they will show us our way home again.", Hansel in Hansel and Gretel

    Key points:

    Markup "breadcrumb" navigation using nested lists so that markup reflects the parent/child or hierarchy relationship.

    screenshot

    screenshot

    Strategy is similar to that of creating tabs. Use "display: inline" to make list items inline; use background image for "li" to show arrow.

    Example 6.14 - Nested lists for 'breadcrumb' navigation - Example 6.14 (Without Styles) | 
    <div id="breadcrumb"><ul>
<li><a href="http://dmoz.org/">Top</a><ul>
<li><a href="http://dmoz.org/Science/">Science</a><ul>
<li><a href="http://dmoz.org/Science/Biology/">Biology</a><ul>
<li><a href="http://dmoz.org/Science/Biology/Genetics/">Genetics</a><ul>
<li><a href="http://dmoz.org/Science/Biology/Genetics/Genomics/">Genomics</a><ul>
<li><span>Pharmacogenetics</span></li>
</ul></li>
</ul></li>
</ul></li>
</ul></li>
</ul></li>
</ul></div>

    In head element: 

    <link rel="stylesheet" type="text/css" href="example14.css"/>

    In example14.css

    /* 
  Order of pseudo-"a" elements:
  LoVe HAte (Link, Visited, Hover, Active 
*/
#breadcrumb a:link , #breadcrumb a:visited ,
#breadcrumb a:hover , #breadcrumb a:active , #breadcrumb li span {
  color: navy;
  font-family: Tahoma, Arial, Helvetica, sans-serif;
  font-size: small;
  font-weight: normal;
  padding: 0.5em;
  text-decoration: none;
}
#breadcrumb a:hover {
  text-decoration: underline;
}
#breadcrumb li span {
  color: black;
}
#breadcrumb {
  background-color: #ddd;
}
#breadcrumb ul {
  display: inline;
  margin-left: 0;
  padding-left: 0;
}
#breadcrumb ul li {
  display: inline;
}
#breadcrumb ul ul li {
  background-image: url(images/arrow.gif);
  background-position: left;
  background-repeat: no-repeat;
  padding-left: 25px;
}
     

    Breadcrumbs with a flat list

    screenshot

    screenshot

    Strategy is similar to that of creating tabs. Use "display: inline" to make list items inline; use background image for "li" to show arrow.

    Example 6.15 - Nested lists for 'breadcrumb' navigation - Example 6.15 (Without Styles) | 
    <div id="breadcrumbf"><ul>
<li><a href="http://dmoz.org/">Top</a></li>
<li><a href="http://dmoz.org/Science/">Science</a></li>
<li><a href="http://dmoz.org/Science/Biology/">Biology</a></li>
<li><a href="http://dmoz.org/Science/Biology/Genetics/">Genetics</a></li>
<li><a href="http://dmoz.org/Science/Biology/Genetics/Genomics/">Genomics</a></li>
<li><span>Pharmacogenetics</span></li>
</ul></div>

    In head element: 

    <link rel="stylesheet" type="text/css" href="example15.css"/>

    In example15.css

    /* 
  Order of pseudo-"a" elements:
  LoVe HAte (Link, Visited, Hover, Active 
*/
 #breadcrumbf a:link, #breadcrumbf a:visited, #breadcrumbf a:hover, #breadcrumbf a:active, #breadcrumbf li span {
    color: navy;
    font-family: Tahoma, Arial, Helvetica, sans-serif;
    font-size: small;
    font-weight: normal;
    padding: 0.5em;
    text-decoration: none;
}
#breadcrumbf a:hover {
    text-decoration: underline;
}
#breadcrumbf li span {
    color: black;
}
#breadcrumbf ul {
    background-color: #ddd;
    padding-left: 0px;
    margin-left: 0px;
}
#breadcrumbf ul li {
    display: inline;
}
#breadcrumbf li:first-child {
    background-image: none;
    padding-left: 0px;
}
#breadcrumbf li {
    background-image: url(images/arrow.gif);
    background-position: left;
    background-repeat: no-repeat;
    padding-left: 25px;
}
     

    CSS Rounded Borders

    rounded box

    CSS3 border-radius

    Example 6.16 - CSS3 border-radius - Example 6.16 (Without Styles) | 
     <div class="box rounded"><h3>Lorem Ipsum</h3><p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur dignissim volutpat diam, ac porttitor orci commodo sit amet. Sed ultrices arcu et lacus sagittis volutpat. Nam ac lectus est. Etiam eget erat lacus. Donec eget auctor tortor. Mauris sit amet lectus ullamcorper purus adipiscing porttitor sed ut lectus.</p>
</div><div class="box tightrounded"><h3>Lorem Ipsum</h3><p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur dignissim volutpat diam, ac porttitor orci commodo sit amet. Sed ultrices arcu et lacus sagittis volutpat. Nam ac lectus est. Etiam eget erat lacus. Donec eget auctor tortor. Mauris sit amet lectus ullamcorper purus adipiscing porttitor sed ut lectus.</p>
</div><div class="box looserounded"><h3>Lorem Ipsum</h3><p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur dignissim volutpat diam, ac porttitor orci commodo sit amet. Sed ultrices arcu et lacus sagittis volutpat. Nam ac lectus est. Etiam eget erat lacus. Donec eget auctor tortor. Mauris sit amet lectus ullamcorper purus adipiscing porttitor sed ut lectus.</p>
</div>

    In style element (<style type="text/css">) within head element: 

    .box { 
    width: 260px; 
    padding: 0 40px; 
    border: 3px solid #009999; 
    background-color: #CCFFFF;
    margin: 1em;
}
.rounded {
     border-radius: 25px;
}
.tightrounded {
     border-radius: 10px;
}
.looserounded {
     border-radius: 50px;
}
     

    border radius

    What's with the "vendor prefixes"?

    .rounded {
    border-radius: 20px 20px 20px 20px;
    -moz-border-radius: 20px 20px 20px 20px;
    -webkit-border-radius: 20px 20px 20px 20px;
    border: 3px solid #000000;
}

    CSS Shadows

    shadows
    Photo by D Sharon Pruitt

    box-shadow

    boxshadow

    CSS3 box-shadow

    Example 6.17 - CSS3 box-shadow - Example 6.17 (Without Styles) | 
     <div class="box shadow"><h3>Lorem Ipsum</h3><p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur dignissim volutpat diam, ac porttitor orci commodo sit amet. Sed ultrices arcu et lacus sagittis volutpat. Nam ac lectus est. Etiam eget erat lacus. Donec eget auctor tortor. Mauris sit amet lectus ullamcorper purus adipiscing porttitor sed ut lectus.</p>
</div>

    In style element (<style type="text/css">) within head element: 

    .box {
    width: 260px;
    padding: 0 40px;
    border: 3px solid #009999;
    background-color: #CCFFFF;
}
.shadow {
    -moz-box-shadow: 5px 5px #99cccc;
    -webkit-box-shadow: 5px 5px #99cccc;
    box-shadow: 5px 5px #99cccc;
}
     

    box shadow

    Text Shadow

    textshadow

    Example 6.18 - CSS3 text-shadow - Example 6.18 (Without Styles) | 
    <div><h3 class="shadow">Only the Shadow Knows</h3><p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur dignissim volutpat diam, ac porttitor orci commodo sit amet. Sed ultrices arcu et lacus sagittis volutpat. Nam ac lectus est. Etiam eget erat lacus. Donec eget auctor tortor. Mauris sit amet lectus ullamcorper purus adipiscing porttitor sed ut lectus.</p>
</div>

    In style element (<style type="text/css">) within head element: 

    h3.shadow {
  background-color: #eef;
  font-size: 24pt;
  padding: 0.25em;
  color: #900;
  /* offset-x | offset-y | blur-radius | color */
  text-shadow: 3px 4px 4px rgba(150,150,150,0.5)
}

    Only the Shadow Knows

    Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur dignissim volutpat diam, ac porttitor orci commodo sit amet. Sed ultrices arcu et lacus sagittis volutpat. Nam ac lectus est. Etiam eget erat lacus. Donec eget auctor tortor. Mauris sit amet lectus ullamcorper purus adipiscing porttitor sed ut lectus.

     

    text shadow

    Opacity - RGBA - red, green, blue, alpha

    A = alpha channel, used for opacity.
    Values of 0 to 1, where 0 is fully transparent, 1 is fully opaque

    demo of opacity

    Example 6.19 - CSS3 text-shadow - Example 6.19 (Without Styles) | 
    <div class="opacity-demo"><p style="color: rgba(0,0,0,1)">Opacity of 1</p>
<p style="color: rgba(0,0,0,0.75)">Opacity of 0.75</p>
<p style="color: rgba(0,0,0,0.5)">Opacity of 0.5</p>
<p style="color: rgba(0,0,0,0.25)">Opacity of 0.25</p>
<p style="color: rgba(0,0,0,0)">Opacity of 0</p>
</div>

    In style element (<style type="text/css">) within head element: 

    .opacity-demo {
  background-image: url('images/satin.png');
  color: white;
}
.opacity-demo p { font-size: 200%; font-weight: bold; font-family: helvetica,sans-serif;}

    Opacity of 1

    Opacity of 0.75

    Opacity of 0.5

    Opacity of 0.25

    Opacity of 0

     

    text shadow

    CSS Gradients

    linear gradient

    linear-gradient

    linear gradient

    Example 6.20 - CSS3 Gradient - Example 6.20 (Without Styles) | 
     <div class="highlight1"><p>linear-gradient(0deg,red,black)<br/>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur dignissim volutpat diam, ac porttitor orci commodo sit amet. Sed ultrices arcu et lacus sagittis volutpat. Nam ac lectus est. Etiam eget erat lacus. Donec eget auctor tortor. Mauris sit amet lectus ullamcorper purus adipiscing porttitor sed ut lectus.</p>
</div><div class="highlight2"><p>linear-gradient(90deg,red,black)<br/>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur dignissim volutpat diam, ac porttitor orci commodo sit amet. Sed ultrices arcu et lacus sagittis volutpat. Nam ac lectus est. Etiam eget erat lacus. Donec eget auctor tortor. Mauris sit amet lectus ullamcorper purus adipiscing porttitor sed ut lectus.</p>
</div><div class="highlight3"><p>linear-gradient(45deg,black,yellow)<br/>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur dignissim volutpat diam, ac porttitor orci commodo sit amet. Sed ultrices arcu et lacus sagittis volutpat. Nam ac lectus est. Etiam eget erat lacus. Donec eget auctor tortor. Mauris sit amet lectus ullamcorper purus adipiscing porttitor sed ut lectus.</p>
</div><div class="highlight4"><p>linear-gradient(90deg,red,white,blue)<br/>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur dignissim volutpat diam, ac porttitor orci commodo sit amet. Sed ultrices arcu et lacus sagittis volutpat. Nam ac lectus est. Etiam eget erat lacus. Donec eget auctor tortor. Mauris sit amet lectus ullamcorper purus adipiscing porttitor sed ut lectus.</p>
</div><div class="highlight5"><p>linear-gradient(90deg,red,orange,yellow,green,blue,indigo,violet)<br/>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur dignissim volutpat diam, ac porttitor orci commodo sit amet. Sed ultrices arcu et lacus sagittis volutpat. Nam ac lectus est. Etiam eget erat lacus. Donec eget auctor tortor. Mauris sit amet lectus ullamcorper purus adipiscing porttitor sed ut lectus.</p>
</div>

    In style element (<style type="text/css">) within head element: 

    .highlight1 {
  background-image: linear-gradient(0deg,red,black);
  color: white;
  line-height: 200%;
}
.highlight2 {
  background-image: linear-gradient(90deg,red,black);
  color: white;
  line-height: 200%;
}
.highlight3 {
  background-image: linear-gradient(45deg,black,yellow);
  color: white;
  line-height: 200%;
}
.highlight4 {
  background-image: linear-gradient(90deg,red,white,blue);
  color: white;
  line-height: 200%;
}
.highlight5 {
  background-image: linear-gradient(90deg, red,orange,yellow,green,blue,indigo,violet);
  color: white;
  line-height: 200%;
}
     

    gradient

    radial-gradient

    radial gradient

    Example 6.21 - CSS3 Gradient - Example 6.21 (Without Styles) | 
     <div class="highlight6"><p>circle, red, black<br/>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur dignissim volutpat diam, ac porttitor orci commodo sit amet. Sed ultrices arcu et lacus sagittis volutpat. Nam ac lectus est. Etiam eget erat lacus. Donec eget auctor tortor. Mauris sit amet lectus ullamcorper purus adipiscing porttitor sed ut lectus.</p>
</div><div class="highlight7"><p>ellipse red black<br/>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur dignissim volutpat diam, ac porttitor orci commodo sit amet. Sed ultrices arcu et lacus sagittis volutpat. Nam ac lectus est. Etiam eget erat lacus. Donec eget auctor tortor. Mauris sit amet lectus ullamcorper purus adipiscing porttitor sed ut lectus.</p>
</div><div class="highlight8"><p>circle,red,orange,yellow,green,blue,indigo,violet<br/>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur dignissim volutpat diam, ac porttitor orci commodo sit amet. Sed ultrices arcu et lacus sagittis volutpat. Nam ac lectus est. Etiam eget erat lacus. Donec eget auctor tortor. Mauris sit amet lectus ullamcorper purus adipiscing porttitor sed ut lectus.</p>
</div><div class="highlight9"><p>ellipse,red,orange,yellow,green,blue,indigo,violet<br/>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur dignissim volutpat diam, ac porttitor orci commodo sit amet. Sed ultrices arcu et lacus sagittis volutpat. Nam ac lectus est. Etiam eget erat lacus. Donec eget auctor tortor. Mauris sit amet lectus ullamcorper purus adipiscing porttitor sed ut lectus.</p>
</div>

    In style element (<style type="text/css">) within head element: 

    .highlight6 {
  background-image: radial-gradient(circle,red,blue);
  color: white;
  line-height: 200%;
}
.highlight7 {
  background-image: radial-gradient(ellipse,red,blue);
  color: white;
  line-height: 200%;
}
.highlight8 {
  background-image: radial-gradient(circle,red,yellow,green,blue,indigo,violet);
  color: white;
  line-height: 200%;
}
.highlight9 {
  background-image: radial-gradient(ellipse,red,yellow,green,blue,indigo,violet);
  color: white;
  line-height: 200%;
}
     

    gradient

    Graphics and Images

    MFANASANYPLSASM

    Graphics: Purpose

    Images and Markup

    Two ways of including images:

    1. Markup: img element 
      <img src="images/shield.png" 
 alt="Harvard Veritas" height="328" width="281"/>
    2. CSS: background-image property 
      #header {
  background-image: url(images/shield.png);
  background-repeat: no-repeat;
}

    Graphics Formats for the Web

    PNG
    Portable Network Graphic
    .png
    JPEG
    Joint Photographic Experts Group
    .jpeg or .jpg
    GIF
    Graphics Interchange Format
    .gif
    SVG
    Scalable Vector Graphics
    .svg and .svgz

    Other formats

    Image formats you might encounter, but aren't super-relevant for the web:

    file.jpg or file.JPG -- Does it matter?

    Graphics: Vector and Bitmap

    BitmapVector
    Original image (PNG):
    bitmap stars    		Original image (SVG):
    stars
    Magnified (16x)
    magnified (16x) bitmap stars    		 Magnified (16x)
    magnified (16x) bitmap stars
    Bitmap formats:
    PNG, JPEG, GIF    		Vector formats:
    SVG

    Colors

    prism light refraction

    RGB Color Space

    256 colors in each channel (Red, Green, Blue). Values can be

    Color Depth

    BitsColors
    121 = 2
    222 = 4
    323 = 8
    424 = 16
    525 = 32
    626 = 64
    727 = 128
    828 = 256
    16216 = 65,536
    24224 = 17 x 106
    (millions)
    32232 = 4.3 x 109

    Indexed Color Systems

    Palette

    An 8-bit indexed image has a palette of up to 256 colors that the image can contain. Color information is not stored for each pixel, but rather just a reference to which color in the palette.

    Palettes

    But what happens to the other colors?

    If you take a photo that is saved in an RGB system (millions of colors) and then convert it to an indexed system with 256 colors, what happens?

    Bitmap images: Size and Quality

    Image Size vs. Quality

    Factors that contribute to image size:

    Graphics Formats for the Web

    PropertyGIF
    Graphics Interchange Format    		JPEG
    Joint Photographic Experts Group    		PNG
    Portable Network Graphic    		SVG
    Scalable Vector Graphics
    Color System8 bit indexed (256 colors)RGB (24 bit; millions of colors)
    • 8 bit indexed (256 colors)
    • RGB (24 bit; millions of colors)
    		24 bit; millions of colors
    CompressionLossless Compression (LZW; horizontal repeating units)"Lossy" Compression
    (compression optimized for gradual color changes)    		Lossless CompressionLossless Compression
    Other Features
    • .gif file extension
    • Transparency
    • Animation
    • .jpg and .jpeg file extensions
    • No Transparency
    • No Animation
    • .png file extension
    • Transparency
    • .svg file extension
    • Vector-based
    • Transparency
    • XML format
    Typical Uses
    • Illustrations (logos, icons)
    • Animated banners and icons
    • Images with small dimension
    • Photographs
    • Any
    		Illustrations
    Graphs, Charts, Maps - 'plain' and 'interactive'
    PropertyGIF
    Graphics Interchange Format    		JPEG
    Joint Photographic Experts Group    		PNG
    Portable Network Graphic    		SVG
    Scalable Vector Graphics
    Photograph
    250 × 188 px    		example
    29.3 kb    		example
    16.8 kb    		example
    25.8 kb (indexed, 8-bit)    		example
    81.9 kb (RGB, 24-bit)    		N/A
    Illustration
    148 × 179 px    		example
    1.47 kb    		example
    6.12 kb    		example
    1.02 kb (indexed, 8-bit)    		example
    1.89 kb (RGB, 24-bit)    		example
    0.575 kb (compressed, 1.7 kb uncompressed; RGB, 24-bit)

    Hot Air Balloon image is in the Public Domain and was obtained from PD Photo.
    Public Domain Dedication

    Illustration image from the original works of David Heitmeyer

    JPEG

    Joint Photographic Experts Group

    PropertyJPEG
    Joint Photographic Experts Group
    Color SystemRGB (24 bit; millions of colors)
    Compression"Lossy" Compression
    (compression optimized for gradual color changes)
    Other Features
    • .jpg and .jpeg file extensions
    • No Transparency
    • No Animation
    Typical Uses
    • Photographs
    PropertyJPEG
    Joint Photographic Experts Group
    Photograph
    250 × 188 px    		example
    16.8 kb
    Illustration
    148 × 179 px    		example
    6.12 kb

    JPEG Compression

    The amount of compression (quality of image) for a JPEG image can be chosen (from a scale of 0 to 100). The image quality is inversely related to the amount of compression since the compression algorithm is "lossy".

    PropertiesImage
    • Quality: 80
    • 34.1 kb
    		Sail Boats
    • Quality: 70
    • 26.0 kb
    		Sail Boats
    • Quality: 60
    • 22.4 kb
    		Sail Boats
    • Quality: 50
    • 17.0 kb
    		Sail Boats
    • Quality: 40
    • 14.3 kb
    		Sail Boats
    • Quality: 30
    • 6.97 kb
    		Sail Boats
    • Quality: 20
    • 4.80 kb
    		Sail Boats
    • Quality: 10
    • 3.75 kb
    		Sail Boats
    • Quality: 1
    • 3.21 kb
    		Sail Boats

    JPEG Compression Artifacts

    Typically first appears at boundaries in images. Portions of image can also become "blocky".

    Schlieren at boundaries:
    jpeg artifacts

    Blockyness
    jpeg artifacts

    GIF

    PropertyGIF
    Graphics Interchange Format
    Color System8 bit indexed (256 colors)
    CompressionLossless Compression (LZW; horizontal repeating units)
    Other Features
    • .gif file extension
    • Transparency
    • Animation
    Typical Uses
    • Illustrations (logos, icons)
    • Animated banners and icons
    • Images with small dimension
    PropertyGIF
    Graphics Interchange Format
    Photograph
    250 × 188 px    		example
    29.3 kb
    Illustration
    148 × 179 px    		example
    1.47 kb

    Palettes

    Palette

    An 8-bit indexed image has a palette of up to 256 colors that the image can contain. Color information is not stored for each pixel, but rather just a reference to which color in the palette.

    Palettes

    Palettes: Exact, Adaptive, Web 216

    Exact Palette

    ImagePalette
    EvergreenEvergreen

    Adaptive Palette

    ImagePalette
    EvergreenEvergreen
    SunsetSunset

    Web 216 Palette

    ImagePalette
    SunsetSunset
    SunsetSunset

    Adaptive Palette: Shift and Dither

    Color Shift

    Image (16 colors; Color Shift)Zoom
    balloonsballoons

    Dither

    Image (16 colors; Dither)Zoom
    balloonsballoons

    GIF Images and Bit Depth: Color Shift

    PropertiesImagePalette (adaptive)
    • 8 bit
    • 256 colors
    • 46.3 kb
    		Sail BoatsSail Boats
    • 7 bit
    • 128 colors
    • 36.2 kb
    		Sail BoatsSail Boats
    • 6 bit
    • 64 colors
    • 28.9 kb
    		Sail BoatsSail Boats
    • 5 bit
    • 32 colors
    • 21.9 kb
    		Sail BoatsSail Boats
    • 4 bit
    • 16 colors
    • 16.5 kb
    		Sail BoatsSail Boats
    • 3 bit
    • 8 colors
    • 10.9 kb
    		Sail BoatsSail Boats
    • 2 bit
    • 4 colors
    • 7.31 kb
    		Sail BoatsSail Boats
    • 1 bit
    • 2 colors
    • 2.84 kb
    		Sail BoatsSail Boats

    GIF Images and Bit Depth: Dither

    PropertiesImagePalette (adaptive)
    • 8 bit
    • 256 colors
    • 64.9 kb
    		Sail BoatsSail Boats
    • 7 bit
    • 128 colors
    • 52.3 kb
    		Sail BoatsSail Boats
    • 6 bit
    • 64 colors
    • 43.4 kb
    		Sail BoatsSail Boats
    • 5 bit
    • 32 colors
    • 34.7 kb
    		Sail BoatsSail Boats
    • 4 bit
    • 16 colors
    • 26.7 kb
    		Sail BoatsSail Boats
    • 3 bit
    • 8 colors
    • 18.6 kb
    		Sail BoatsSail Boats
    • 2 bit
    • 4 colors
    • 14.2 kb
    		Sail BoatsSail Boats
    • 1 bit
    • 2 colors
    • 5.86 kb
    		Sail BoatsSail Boats

    Compression for Indexed GIF

    GIF LZW compression operates on horizontal blocks of the same color. Here are two images that are identical except for a 90 degree rotation. The vertical stripe GIF image is nearly twice as large as the horizontal stripe GIF image. The PNG images are the same size.

    FormatHorizontal
    Stripes    		Vertical
    Stripes
    GIFhorizontal lines
    471 bytes     		vertical lines
    911 bytes
    PNGhorizontal lines
    232 bytes     		vertical lines
    221 bytes

    Compression and Dithering

    A purple shade was created by alternating red and blue pixels.
    32× magnification:
    purple closeup

    200×200px Image, Dithered and Solid
    Image FormatDithered GridSolid
    PNGdither
    225 bytes    		solid
    209 bytes
    GIFdither
    601 bytes    		solid
    303 bytes

    Transparency

    With PNG images, a color in the palette can be designated as "transparent". This lets any background colors or background images show through the transparent portions.

    star
    Star Image

    satin
    Background Image
    (satin.png)

    FormatBackground Color
    (gray)    		Background Image
    satin.png
    GIF
    No transparency    		starstar
    GIF
    White is transparent    		starstar
    GIF
    Blue is transparent    		starstar
    PNG
    No transparency    		starstar
    PNG
    White is transparent    		starstar
    PNG
    Blue is transparent    		starstar

    GIF Animation

    Loading

    PNG

    PropertyPNG
    Portable Network Graphic
    Color System
    • 8 bit indexed (256 colors)
    • RGB (24 bit; millions of colors)
    CompressionLossless Compression
    Other Features
    • .png file extension
    • Transparency
    • Animation through non-standard extension
    Typical Uses
    • Any
    PropertyPNG
    Portable Network Graphic
    Photograph
    250 × 188 px    		example
    25.8 kb (indexed, 8-bit)    		example
    81.9 kb (RGB, 24-bit)
    Illustration
    148 × 179 px    		example
    1.02 kb (indexed, 8-bit)    		example
    1.89 kb (RGB, 24-bit)

    Compression for Indexed PNG

    PNG images use a different compression algorithm than GIF. Note that for PNG, the vertical and horizontal striped images are the same size.

    FormatHorizontal
    Stripes    		Vertical
    Stripes
    PNGhorizontal lines
    232 bytes     		vertical lines
    221 bytes
    GIFhorizontal lines
    471 bytes     		vertical lines
    911 bytes

    Compression and Dithering

    A purple shade was created by alternating red and blue pixels.
    32× magnification:
    purple closeup

    200×200px Image, Dithered and Solid
    Image FormatDithered GridSolid
    PNGdither
    225 bytes    		solid
    209 bytes
    GIFdither
    601 bytes    		solid
    303 bytes

    Transparency

    With PNG images, a color in the palette can be designated as "transparent". This lets any background colors or background images show through the transparent portions.

    star
    Star Image

    satin
    Background Image
    (satin.png)

    FormatBackground Color
    (gray)    		Background Image
    satin.png
    GIF
    No transparency    		starstar
    GIF
    White is transparent    		starstar
    GIF
    Blue is transparent    		starstar
    PNG
    No transparency    		starstar
    PNG
    White is transparent    		starstar
    PNG
    Blue is transparent    		starstar

    Animated PNG (APNG)

    Animated PNG (APNG) not widely supported across browsers now.
    Something to keep an eye on!

    SVG

    PropertySVG
    Scalable Vector Graphics
    TypeVector
    Color SystemRGB
    CompressionLossless Compression
    Other Features
    • .svg file extension
    • Transparency
    • XML format
    • Uses CSS properties!
    Typical Uses
    • Illustrations (logos, icons)
    • Vector Art
    Illustration
    300x300px    		example
    575 bytes compressed; 1.7 kb uncompressed

    Basic SVG Shapes

    Basic Shapes in SVG 1.1

    SVG:
    shapes
    <?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
  "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg width="300" height="200" xmlns="http://www.w3.org/2000/svg" version="1.1">
  <rect x="100" y="100" height="30" width="70" rx="10" ry="10"
    style="fill:green; stroke: black;"/>
  <circle cx="50" cy="20" r="15" style="fill:red; stroke: black;"/>
  <ellipse cx="60" cy="75" rx="15" ry="40" fill="yellow" stroke="black"/>
  <line x1="10" y1="3" x2="30" y2="70" stroke-width="5" stroke="magenta"/>
  <polyline fill="none" points="160,15,170,25,180,15,190,25,200,15,210,25,220,15"
    stroke="blue" stroke-width="3"/>
  <polygon points="100,80,150,40,200,60" fill="orange" stroke="black"/>
  <path d="M0 0 C 10 20, 30 20, 40 0" style="stroke: black; stroke-width: 3px; fill: transparent"  transform="translate(-20,-30)"/>
</svg>

    United States Flag

    United States Flag

    Harvard Division of Continuing Education Shield

    DCE Shield

    DCE Shield

    Massachusetts Map

    Shaded according to 2012 senate race results by town.

    ma

    United Nations Flag

    united nations

    SVG -- Increasing Importance in the Future

    SVG and D3 JS Library

    D3.js
    D3.js is a JavaScript library for manipulating documents based on data. D3 helps you bring data to life using HTML, SVG, and CSS. D3’s emphasis on web standards gives you the full capabilities of modern browsers without tying yourself to a proprietary framework, combining powerful visualization components and a data-driven approach to DOM manipulation.

    Comparison of Image Formats

    Graphics Formats for the Web

    PropertyGIF
    Graphics Interchange Format    		JPEG
    Joint Photographic Experts Group    		PNG
    Portable Network Graphic    		SVG
    Scalable Vector Graphic
    Color System8 bit indexed (256 colors)RGB (24 bit; millions of colors)
    • 8 bit indexed (256 colors)
    • RGB (24 bit; millions of colors)
    		RGB
    CompressionLossless Compression (LZW; horizontal repeating units)"Lossy" Compression
    (compression optimized for gradual color changes)    		Lossless CompressionLossless (gzip)
    Other Features
    • .gif file extension
    • Transparency
    • Animation
    • .jpg and .jpeg file extensions
    • No Transparency
    • No Animation
    • .png file extension
    • Transparency
    • Animation through APNG, but not widely supported
    • .svg file extension
    • Transparency
    • XML format
    • Uses CSS properties!
    Typical Uses
    • Illustrations (logos, icons)
    • Animated banners and icons
    • Images with small dimension
    • Photographs
    • Any
    • Illustrations (logos, icons)
    • Vector Art
    PropertyGIF
    Graphics Interchange Format    		JPEG
    Joint Photographic Experts Group    		PNG
    Portable Network Graphic    		SVG
    Scalable Vector Graphic
    Photograph
    250 × 188 px    		example
    29.3 kb    		example
    16.8 kb    		example
    25.8 kb (indexed, 8-bit)    		example
    81.9 kb (RGB, 24-bit)    		N/A
    Illustration
    148 × 179 px    		example
    1.47 kb    		example
    6.12 kb    		example
    1.02 kb (indexed, 8-bit)    		example
    1.89 kb (RGB, 24-bit)    		example
    0.6 kb

    Hot Air Balloon image is in the Public Domain and was obtained from PD Photo.
    Public Domain Dedication

    Illustration image from the original works of David Heitmeyer

    Cartoon Art

    GIFPNGJPEGSVG
    GIF
    [an error occurred while processing this directive]1,511 bytes
    [Cartoon GIF]    		PNG; 8 bit
    [an error occurred while processing this directive] 1,031 bytes
    [Cartoon PNG 8bit]    		JPEG (Quality 100)
    [an error occurred while processing this directive] 14,660 bytes
    [Cartoon JPEG]    		SVG
    575 bytes (compresssed)
    [Cartoon SVG]
     PNG; 24 bit
    [an error occurred while processing this directive] 1,944 bytes
    [Cartoon PNG 24bit]    		JPEG (Quality 6)
    [an error occurred while processing this directive] 1,530 bytes
    [Cartoon JPEG]

    Original image from the works of David P. Heitmeyer

    Working with Images

    Graphics Tools

    Start with Original PSD/AI/etc. or High Resolution 24-bit PNG

    Gazebo Image

    Do's and Don'ts - shrinking

    Don't shrink image with style properties:

    Do resize image in graphics program:

    Do's and Don'ts - enlarging

    Don't enlarge images from smaller one:

    Do start from high resolution source file or original file format:

    Do's and Don'ts - choose appropriate format

    Don't use JPEG for illustrations (used Quality 44 to get to same size as 24-bit PNG of same dimensions):

    TOC
    View as Slides

    Copyright © David Heitmeyer