You can use CSS filters to add special effects to text, images and
other aspects of a webpage without using images or other graphics.
Filters only work on Internet Explorer 4.0+,.
If you are developing your site for multi browsers, then it may not be a
good idea to use CSS filters because there is a possibility that it
would not give any advantage.
In this chapter, we will see the details of each CSS filter. These filters may not work in your browser.
Alpha Channel
The Alpha Channel filter alters the opacity of the object, which
makes it blend into the background. The following parameters can be used
in this filter −
| Parameter |
Description |
| opacity |
Level of the opacity. 0 is fully transparent, 100 is fully opaque. |
| finishopacity |
Level of the opacity at the other end of the object. |
| style |
The shape of the opacity gradient.
0 = uniform
1 = linear
2 = radial
3 = rectangular
|
| startX |
X coordinate for opacity gradient to begin. |
| startY |
Y coordinate for opacity gradient to begin. |
| finishX |
X coordinate for opacity gradient to end. |
| finishY |
Y coordinate for opacity gradient to end. |
Example
<html>
<head>
</head>
<body>
<p>Image Example:</p>
<img src="/css/images/logo.png" alt="CSS Logo"
style="Filter: Alpha(Opacity=100,
FinishOpacity=0,
Style=2,
StartX=20,
StartY=40,
FinishX=0,
FinishY=0)" />
<p>Text Example:</p>
<div style="width: 357;
height: 50;
font-size: 30pt;
font-family: Arial Black;
color: blue;
Filter: Alpha(Opacity=100, FinishOpacity=0, Style=1, StartX=0, StartY=0, FinishX=580, FinishY=0)">CSS Tutorials</div>
</body>
</html>
It will produce the following result −
Motion Blur
Motion Blur is used to create blurred pictures or text with the
direction and strength. The following parameters can be used in this
filter −
| Parameter |
Description |
| add |
True or false. If true, the image is added to the blurred image; and if false, the image is not added to the blurred image. |
| direction |
The direction of the blur, going clockwise, rounded to 45-degree increments. The default value is 270 (left).
0 = Top
45 = Top right
90 = Right
135 = Bottom right
180 = Bottom
225 = Bottom left
270 = Left
315 = Top left
|
| strength |
The number of pixels the blur will extend. The default is 5 pixels.
|
Example
<html>
<head>
</head>
<body>
<p>Image Example:</p>
<img src="/css/images/logo.png" alt="CSS Logo"
style="Filter: Blur(Add = 0, Direction = 225, Strength = 10)">
<p>Text Example:</p>
<div style="width: 357;
height: 50;
font-size: 30pt;
font-family: Arial Black;
color: blue;
Filter: Blur(Add = 1, Direction = 225, Strength = 10)">CSS Tutorials</div>
</body>
</html>
It will produce the following result −
Chroma Filter
Chroma Filter is used to make any particular color transparent and
usually it is used with images. You can use it with scrollbars also. The
following parameter can be used in this filter −
| Parameter |
Description |
| color |
The color that you'd like to be transparent. |
Example
<html>
<head>
</head>
<body>
<p>Image Example:</p>
<img src="/images/css.gif"
alt="CSS Logo" style="Filter: Chroma(Color = #FFFFFF)">
<p>Text Example:</p>
<div style="width: 580;
height: 50;
font-size: 30pt;
font-family: Arial Black;
color: #3300FF;
Filter: Chroma(Color = #3300FF)">CSS Tutorials</div>
</body>
</html>
It will produce the following result −
Drop Shadow Effect
Drop Shadow is used to create a shadow of your object at the specified X (horizontal) and Y (vertical) offset and color.
The following parameters can be used in this filter −
| Parameter |
Description |
| color |
The color, in #RRGGBB format, of the dropshadow. |
| offX |
Number of pixels the drop shadow is offset from the visual object,
along the x-axis. Positive integers move the drop shadow to the right,
negative integers move the drop shadow to the left. |
| offY |
Number of pixels the drop shadow is offset from the visual object,
along the y-axis. Positive integers move the drop shadow down, negative
integers move the drop shadow up. |
| positive |
If true, all opaque pixels of the object have a dropshadow. If
false, all transparent pixels have a dropshadow. The default is true. |
Example
<html>
<head>
</head>
<body>
<p>Image Example:</p>
<img src="/css/images/logo.png"
alt="CSS Logo"
style="Filter: Chroma(Color = #000000)
DropShadow(Color=#FF0000,
OffX=2,
OffY=2, Positive=1)">
<p>Text Example:</p>
<div style="width: 357;
height: 50;
font-size: 30pt;
font-family: Arial Black;
color: red;
Filter: DropShadow(Color=#000000, OffX=2, OffY=2, Positive=1)">CSS Tutorials</div>
</body>
</html>
It will produce the following result −
Flip Effect
Flip effect is used to create a mirror image of the object. The following parameters can be used in this filter −
| Parameter |
Description |
| FlipH |
Creates a horizontal mirror image |
| FlipV |
Creates a vertical mirror image |
Example
<html>
<head>
</head>
<body>
<p>Image Example:</p>
<img src="/css/images/logo.png"
alt="CSS Logo"
style="Filter: FlipH">
<img src="/css/images/logo.png" alt="CSS Logo" style="Filter: FlipV">
<p>Text Example:</p>
<div style="width: 300;
height: 50;
font-size: 30pt;
font-family: Arial Black;
color: red;
Filter: FlipV">CSS Tutorials</div>
</body>
</html>
It will produce the following result −
Glow Effect
Glow effect is used to create a glow around the object. If it is a
transparent image, then glow is created around the opaque pixels of it.
The following parameters can be used in this filter −
| Parameter |
Description |
| color |
The color you want the glow to be. |
| strength |
The intensity of the glow (from 1 to 255). |
Example
<html>
<head>
</head>
<body>
<p>Image Example:</p>
<img src="/css/images/logo.png"
alt="CSS Logo"
style="Filter: Chroma(Color = #000000) Glow(Color=#00FF00, Strength=20)">
<p>Text Example:</p>
<div style="width: 357;
height: 50;
font-size: 30pt;
font-family: Arial Black;
color: red;
Filter: Glow(Color=#00FF00, Strength=20)">CSS Tutorials</div>
</body>
</html>
It will produce the following result −
Grayscale Effect
Grayscale effect is used to convert the colors of the object to 256
shades of gray. The following parameter is used in this filter −
| Parameter |
Description |
| gray |
Converts the colors of the object to 256 shades of gray. |
Example
<html>
<head>
</head>
<body>
<p>Image Example:</p>
<img src="/css/images/logo.png"
alt="CSS Logo"
style="Filter: Gray">
<p>Text Example:</p>
<div style="width: 357;
height: 50;
font-size: 30pt;
font-family: Arial Black;
color: red;
Filter: Gray">CSS Tutorials</div>
</body>
</html>
It will produce the following result −
Invert Effect
Invert effect is used to map the colors of the object to their
opposite values in the color spectrum, i.e., to create a negative image.
The following parameter is used in this filter −
| Parameter |
Description |
| Invert |
Maps the colors of the object to their opposite value in the color spectrum. |
Example
<html>
<head>
</head>
<body>
<p>Image Example:</p>
<img src="/images/css.gif"
alt="CSS Logo"
style="Filter: invert">
<p>Text Example:</p>
<div style="width: 357;
height: 50;
font-size: 30pt;
font-family: Arial Black;
color: red;
Filter: invert">CSS Tutorials</div>
</body>
</html>
It will produce the following result −
Mask Effect
Mask effect is used to turn transparent pixels to a specified color
and makes opaque pixels transparent. The following parameter is used in
this filter −
| Parameter |
Description |
| color |
The color that the transparent areas will become. |
Example
<html>
<head>
</head>
<body>
<p>Image Example:</p>
<img src="/css/images/logo.png"
alt="CSS Logo"
style="FILTER: Chroma(Color = #000000) Mask(Color=#00FF00)">
<p>Text Example:</p>
<div style="width: 357;
height: 50;
font-size: 30pt;
font-family: Arial Black;
color: red;
Filter: Mask(Color=#00FF00)">CSS Tutorials</div>
</body>
</html>
It will produce the following result −
Shadow Filter
Shadow filter is used to create an attenuated shadow in the direction
and color specified. This is a filter that lies in between Dropshadow
and Glow. The following parameters can be used in this filter −
| Parameter |
Description |
| color |
The color that you want the shadow to be. |
| direction |
The direction of the blur, going clockwise, rounded to 45-degree increments. The default value is 270 (left).
0 = Top
45 = Top right
90 = Right
135 = Bottom right
180 = Bottom
225 = Bottom left
270 = Left
315 = Top left
|
Example
<html>
<head>
</head>
<body>
<p>Image Example:</p>
<img src="/css/images/logo.png"
alt="CSS Logo"
style="FILTER: Chroma(Color = #000000) Shadow(Color=#00FF00, Direction=225)">
<p>Text Example:</p>
<div style="width: 357;
height: 50;
font-size: 30pt;
font-family:
Arial Black;
color: red;
Filter: Shadow(Color=#0000FF, Direction=225)">CSS Tutorials</div>
</body>
</html>
It will produce the following result −
Wave Effect
Wave effect is used to give the object a sine wave distortion to make
it look wavy. The following parameters can be used in this filter −
| Parameter |
Description |
| add |
A value of 1 adds the original image to the waved image, 0 does not. |
| freq |
The number of waves. |
| light |
The strength of the light on the wave (from 0 to 100). |
| phase |
At what degree the sine wave should start (from 0 to 100). |
| strength |
The intensity of the wave effect. |
Example
<html>
<head>
</head>
<body>
<p>Image Example:</p>
<img src="/css/images/logo.png"
alt="CSS Logo"
style="FILTER: Chroma(Color = #000000)
Wave(Add=0, Freq=1, LightStrength=10, Phase=220, Strength=10)">
<p>Text Example:</p>
<div style="width: 357;
height: 50;
font-size: 30pt;
font-family: Arial Black;
color: red;
Filter: Wave(Add=0, Freq=1, LightStrength=10, Phase=20, Strength=20)">CSS Tutorials</div>
</body>
</html>
It will produce the following result −
X-Ray Effect
X-Ray effect grayscales and flattens the color depth. The following parameter is used in this filter:
| Parameter |
Description |
| xray |
Grayscales and flattens the color depth. |
Example
<html>
<head>
</head>
<body>
<p>Image Example:</p>
<img src="/css/images/logo.png"
alt="CSS Logo"
style="Filter: Xray"">
<p>Text Example:</p>
<div style="width: 357;
height: 50;
font-size: 30pt;
font-family: Arial Black;
color: red;
style="Filter: Xray">CSS Tutorials</div>
</body>
</html>
It will produce the following result −
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