8 <meta charset="utf-8" />
9 <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no" />
10 <meta http-equiv="x-ua-compatible" content="ie=edge" />
11 <title>Image Gradients @ ImageMagick</title>
12 <meta http-equiv="content-type" content="text/html; charset=utf-8"/>
13 <meta name="application-name" content="ImageMagick"/>
14 <meta name="description" content="ImageMagick® is a software suite to create, edit, compose, or convert bitmap images. It can read and write images in a variety of formats (over 200) including PNG, JPEG, JPEG-2000, GIF, WebP, Postscript, PDF, and SVG. Use ImageMagick to resize, flip, mirror, rotate, distort, shear and transform images, adjust image colors, apply various special effects, or draw text, lines, polygons, ellipses and Bézier curves."/>
15 <meta name="application-url" content="https://www.imagemagick.org"/>
16 <meta name="generator" content="PHP"/>
17 <meta name="keywords" content="image, gradients, ImageMagick, PerlMagick, image processing, image, photo, software, Magick++, OpenMP, convert"/>
18 <meta name="rating" content="GENERAL"/>
19 <meta name="robots" content="INDEX, FOLLOW"/>
20 <meta name="generator" content="ImageMagick Studio LLC"/>
21 <meta name="author" content="ImageMagick Studio LLC"/>
22 <meta name="revisit-after" content="2 DAYS"/>
23 <meta name="resource-type" content="document"/>
24 <meta name="copyright" content="Copyright (c) 1999-2017 ImageMagick Studio LLC"/>
25 <meta name="distribution" content="Global"/>
26 <meta name="magick-serial" content="P131-S030410-R485315270133-P82224-A6668-G1245-1"/>
27 <meta name="google-site-verification" content="_bMOCDpkx9ZAzBwb2kF3PRHbfUUdFj2uO8Jd1AXArz4" />
28 <link rel="canonical" href="https://www.imagemagick.org/script/gradient.html"/>
29 <link rel="icon" href="../images/wand.png"/>
30 <link rel="shortcut icon" href="../images/wand.ico"/>
31 <link rel="stylesheet" type="text/css" href="http://fonts.googleapis.com/css?family=Roboto:900,400,400italic,700,700italic,300,300italic|Open+Sans:300italic,400italic,700italic,300,400,600,700" />
32 <link rel="stylesheet" href="css/magick.css"/>
36 <div class="magick-masthead">
37 <div class="container">
38 <script async="async" src="http://localhost/pagead/js/adsbygoogle.js"></script> <ins class="adsbygoogle"
40 data-ad-client="ca-pub-3129977114552745"
41 data-ad-slot="6345125851"
42 data-ad-format="auto"></ins>
44 (adsbygoogle = window.adsbygoogle || []).push({});
46 <nav class="magick-nav">
47 <a class="magick-nav-item " href="../index.html">Home</a>
48 <a class="magick-nav-item " href="download.html">Download</a>
49 <a class="magick-nav-item " href="command-line-tools.html">Tools</a>
50 <a class="magick-nav-item " href="command-line-processing.html">Command-line</a>
51 <a class="magick-nav-item " href="resources.html">Resources</a>
52 <a class="magick-nav-item " href="develop.html">Develop</a>
53 <a class="magick-nav-item " href="https://www.imagemagick.org/script/search.php">Search</a>
54 <a class="magick-nav-item pull-right" href="https://www.imagemagick.org/discourse-server/">Community</a>
58 <div class="container">
59 <div class="magick-header">
61 <p class="lead magick-description">An image gradient creates a gradual blend between two colors formed into a shape that is linear, circular, or ellipical.</p>
63 <p>For a linear gradient, the operator is either:</p>
67 gradient:color1-color2
70 <p> The for a radial gradient, the operator is either:</p>
74 radial-gradient:color1-color2
77 <p> In the above, color1 is the fromColor and color2 is the toColor, as described in more detail below. The default is white for color1 and black for color2, i.e., white-black.</p>
79 <p>The default for a linear gradient has color1 at the top of the image and color2 at the bottom of the image. Similarly, the default for a radial gradient has color1 at the center of the image and color2 at the boundary of the image.</p>
81 <p>Gradient colors may be any valid color defined per <a href="https://www.imagemagick.org/script/color.html" target="_blank">https://www.imagemagick.org/script/color.html</a>. The named colors of black/white/grayXX are non-linear gray gradients; whereas gray(XX[%]) is a linear gray gradient. For Unix systems, enclose rgb(a) and hex colors in quotes. Use double quotes, if using variables for the values.</p>
83 <p>Here is an example linear gradient:</p>
86 convert -size 256x256 gradient: linear_gradient.png
87 convert -size 256x256 gradient:white-black linear_gradient.png
89 <p><img src="../images/gradients/linear_gradient.png" width="256" height="256" /></p>
91 <p>If you want a radial gradient, try:</p>
94 convert -size 256x256 radial-gradient: radial_gradient.png
95 convert -size 256x256 radial-gradient:white-black radial_gradient.png
97 <p><img src="../images/gradients/radial_gradient.png" width="256" height="256" /></p>
99 <p>As of IM 6.9.2.5, gradients have been enhanced through the use of several -defines.</p>
101 <table class="table table-condensed table-striped">
103 <td><code>-define gradient:vector=<var>x1</var>,<var>y1</var>, <var>x2</var>,<var>y2</var></code></td>
104 <td>Specifies the direction of the linear gradient going from vector1
105 (x1,y1) to vector2 (x2,y2). Color1 (fromColor) will be located at vector
106 position x1,y1 and color2 (toColor) will be located at vector position
111 <td><code>-define gradient:center=<var>x</var>,<var>y</var></code></td>
112 <td>Specifies the coordinates of the center point for the radial gradient.
113 The default is the center of the image.</td>
117 <td><code>-define gradient:radii=<var>x</var>,<var>y</var></code></td>
118 <td>Specifies the x and y radii of the gradient. If the x radius and the y
119 radius are equal, the shape of the radial gradient will be a circle. If
120 they differ, then the shape will be an ellipse. The default values are the
121 maximum of the half width and half height of the image.</td>
125 <td><code>-define gradient:angle=<var>angle in degrees</var></code></td>
126 <td>For a linear gradient, this specifies the direction of the gradient
127 going from color1 to color2 in a clockwise positive manner relative to
128 north (up). For a radial gradient, this specifies the rotation of the
129 gradient in a clockwise positive manner from its normal X-Y
134 <td><code>-define gradient:bounding-box=<var>width</var>x<var>height</var>+<var>x</var>+<var>y</var></code></td>
135 <td>Limits the gradient to a larger or smaller region than the image
136 dimensions. If the region defined by the bounding box is smaller than the
137 image, then color1 will be the color of the background.</td>
142 <p>We also support two convenience defines for setting the linear gradient direction and the radial gradient shape.</p>
144 <table class="table table-condensed table-striped">
146 <td><code>-define gradient:direction=<em>{NorthWest, North, Northeast, West, East, SouthWest, South, SouthEast}</em></code></td>
147 <td>Specifies the direction of the linear gradient towards the
148 top/bottom/left/right or diagonal corners.</td>
152 <td><code>-define gradient:extent=<em>{Circle, Diagonal, Ellipse, Maximum, Minimum}</em></code></td>
153 <td>Specifies the shape of an image centered radial gradient. Circle and
154 Maximum draw a circular radial gradient even for rectangular shaped images
155 of radius equal to the larger of the half-width and half-height of the
156 image. The Circle and Maximum options are both equivalent to the default
157 radial gradient. The Minimum option draws a circular radial gradient
158 even for rectangular shaped images of radius equal to the smaller of the
159 half-width and half-height of the image. The Diagonal option draws a
160 circular radial gradient even for rectangular shaped images of radius equal
161 to the half-diagonal of the image. The Ellipse options draws an elliptical
162 radial gradient for rectangular shaped images of radii equal to half the
163 width and half the height of the image.</td>
169 <p>The default linear gradient may also be generated in any of the following ways (or by reversing the direction and swapping color1 and color2):</p>
172 convert -size 256x128 -define gradient:direction=north gradient:black-white linear_gradient_default.png
173 convert -size 256x128 -define gradient:angle=0 gradient:black-white linear_gradient_default.png
175 <p><img src="../images/gradients/linear_gradient_default.png" width="256" height="128" /></p>
177 <p>The equivalent of </p>
180 convert -size 128x256 gradient: -rotate 90 linear_gradient_east.png
183 <p>can be generate by either of the following (or by reversing the direction and swapping color1 and color2):</p>
186 convert -size 256x128 -define gradient:direction=east gradient:black-white linear_gradient_east.png
187 convert -size 256x128 -define gradient:angle=90 gradient:black-white linear_gradient_east.png
189 <p><img src="../images/gradients/linear_gradient_east.png" width="256" height="128" /></p>
192 <p>Examples of radial gradients going from black in the center to white at the boundary for the cases of "maximum/circle/default", "minimum", "diagonal", "ellipse" and 45 degree rotated ellipse, respectively, follow below.</p>
196 convert -size 256x128 radial-gradient:black-white radial_gradient_maximum.png
197 convert -size 256x128 -define gradient:radii=128,128 radial-gradient:black-white radial_gradient_maximum.png
199 <p><img src="../images/gradients/radial_gradient_maximum.png" width="256" height="128" /></p>
202 convert -size 256x128 -define gradient:extent=minimum radial-gradient:black-white radial_gradient_minimum.png
203 convert -size 256x128 -define gradient:radii=64,64 radial-gradient:black-white radial_gradient_minimum.png
205 <p><img src="../images/gradients/radial_gradient_minimum.png" width="256" height="128" /></p>
208 convert -size 256x128 -define gradient:extent=diagonal radial-gradient:black-white radial_gradient_diagonal.png
210 <p><img src="../images/gradients/radial_gradient_diagonal.png" width="256" height="128" /></p>
213 convert -size 256x128 -define gradient:extent=ellipse radial-gradient:black-white radial_gradient_ellipse.png
214 convert -size 256x128 -define gradient:radii=128,64 radial-gradient:black-white radial_gradient_ellipse.png
216 <p><img src="../images/gradients/radial_gradient_ellipse.png" width="256" height="128" /></p>
219 convert -size 256x256 -define gradient:radii=128,64 -define gradient:angle=45 radial-gradient:black-white radial_gradient_ellipse_angle45.png
221 <p><img src="../images/gradients/radial_gradient_ellipse_angle45.png" width="256" height="256" /></p>
225 <footer class="magick-footer">
226 <p><a href="support.html">Donate</a> •
227 <a href="sitemap.html">Sitemap</a> •
228 <a href="links.html">Related</a> •
229 <a href="security-policy.html">Security</a> •
230 <a href="architecture.html">Architecture</a>
232 <p><a href="gradient.html#">Back to top</a> •
233 <a href="http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x89AB63D48277377A">Public Key</a> •
234 <a href="https://www.imagemagick.org/script/contact.php">Contact Us</a></p>
235 <p><small>© 1999-2017 ImageMagick Studio LLC</small></p>
237 </div><!-- /.container -->
239 <script src="https://localhost/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
240 <script src="../js/magick.html"></script>
244 <!-- Magick Cache 21st January 2017 12:17 -->