<?php
include_once $_SERVER['DOCUMENT_ROOT'] . '/include/shared-manual.inc';
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?>
<div id="book.gmagick" class="book">
 
 <h1 class="title">Gmagick</h1>
 

 <div id="intro.gmagick" class="preface">
  <h1 class="title">Introduction</h1>
  <div class="warning"><strong class="warning">Warning</strong><p class="simpara">This extension is
<em>EXPERIMENTAL</em>. The behaviour of this extension including
the names of its functions and any other documentation surrounding this
extension may change without notice in a future release of PHP.
This extension should be used at your own risk.</p></div>
  <p class="simpara">
   Gmagick is a php extension to create, modify and obtain meta information of images using the GraphicsMagick API.
  </p>
  <p class="simpara">
   GraphicsMagick prides itself as the swiss army knife of image processing. It works with over 88 major formats
   including important formats like DPX, GIF, JPEG, JPEG-2000, PNG, PDF, PNM, and TIFF.
  </p>
  <p class="simpara">
   Gmagick consists of a main Gmagick class, a GmagickDraw class which is in effect a drawing wand and a
   GmagickPixel class of which instances represent a single pixel of an image (color, opacity).
  </p>
</div>

 




 







 




 




 




 




<ul class="chunklist chunklist_book"><li><a href="gmagick.setup.php">Installing/Configuring</a><ul class="chunklist chunklist_book chunklist_children"><li><a href="gmagick.requirements.php">Requirements</a></li><li><a href="gmagick.installation.php">Installation</a></li></ul></li><li><a href="gmagick.constants.php">Predefined Constants</a></li><li><a href="gmagick.examples.php">Examples</a></li><li><a href="class.gmagick.php">Gmagick</a> — The Gmagick class<ul class="chunklist chunklist_book chunklist_children"><li><a href="gmagick.addimage.php">Gmagick::addimage</a> — Adds new image to Gmagick object image list</li><li><a href="gmagick.addnoiseimage.php">Gmagick::addnoiseimage</a> — Adds random noise to the image</li><li><a href="gmagick.annotateimage.php">Gmagick::annotateimage</a> — Annotates an image with text</li><li><a href="gmagick.blurimage.php">Gmagick::blurimage</a> — Adds blur filter to image</li><li><a href="gmagick.borderimage.php">Gmagick::borderimage</a> — Surrounds the image with a border</li><li><a href="gmagick.charcoalimage.php">Gmagick::charcoalimage</a> — Simulates a charcoal drawing</li><li><a href="gmagick.chopimage.php">Gmagick::chopimage</a> — Removes a region of an image and trims</li><li><a href="gmagick.clear.php">Gmagick::clear</a> — Clears all resources associated to Gmagick object</li><li><a href="gmagick.commentimage.php">Gmagick::commentimage</a> — Adds a comment to your image</li><li><a href="gmagick.compositeimage.php">Gmagick::compositeimage</a> — Composite one image onto another</li><li><a href="gmagick.construct.php">Gmagick::__construct</a> — The Gmagick constructor</li><li><a href="gmagick.cropimage.php">Gmagick::cropimage</a> — Extracts a region of the image</li><li><a href="gmagick.cropthumbnailimage.php">Gmagick::cropthumbnailimage</a> — Creates a crop thumbnail</li><li><a href="gmagick.current.php">Gmagick::current</a> — The current purpose</li><li><a href="gmagick.cyclecolormapimage.php">Gmagick::cyclecolormapimage</a> — Displaces an image's colormap</li><li><a href="gmagick.deconstructimages.php">Gmagick::deconstructimages</a> — Returns certain pixel differences between images</li><li><a href="gmagick.despeckleimage.php">Gmagick::despeckleimage</a> — The despeckleimage purpose</li><li><a href="gmagick.destroy.php">Gmagick::destroy</a> — The destroy purpose</li><li><a href="gmagick.drawimage.php">Gmagick::drawimage</a> — Renders the GmagickDraw object on the current image</li><li><a href="gmagick.edgeimage.php">Gmagick::edgeimage</a> — Enhance edges within the image</li><li><a href="gmagick.embossimage.php">Gmagick::embossimage</a> — Returns a grayscale image with a three-dimensional effect</li><li><a href="gmagick.enhanceimage.php">Gmagick::enhanceimage</a> — Improves the quality of a noisy image</li><li><a href="gmagick.equalizeimage.php">Gmagick::equalizeimage</a> — Equalizes the image histogram</li><li><a href="gmagick.flipimage.php">Gmagick::flipimage</a> — Creates a vertical mirror image</li><li><a href="gmagick.flopimage.php">Gmagick::flopimage</a> — Creates a horizontal mirror image</li><li><a href="gmagick.frameimage.php">Gmagick::frameimage</a> — Adds a simulated three-dimensional border</li><li><a href="gmagick.gammaimage.php">Gmagick::gammaimage</a> — Gamma-corrects an image</li><li><a href="gmagick.getcopyright.php">Gmagick::getcopyright</a> — Returns the GraphicsMagick API copyright as a string</li><li><a href="gmagick.getfilename.php">Gmagick::getfilename</a> — The filename associated with an image sequence</li><li><a href="gmagick.getimagebackgroundcolor.php">Gmagick::getimagebackgroundcolor</a> — Returns the image background color</li><li><a href="gmagick.getimageblueprimary.php">Gmagick::getimageblueprimary</a> — Returns the chromaticy blue primary point</li><li><a href="gmagick.getimagebordercolor.php">Gmagick::getimagebordercolor</a> — Returns the image border color</li><li><a href="gmagick.getimagechanneldepth.php">Gmagick::getimagechanneldepth</a> — Gets the depth for a particular image channel</li><li><a href="gmagick.getimagecolors.php">Gmagick::getimagecolors</a> — Returns the color of the specified colormap index</li><li><a href="gmagick.getimagecolorspace.php">Gmagick::getimagecolorspace</a> — Gets the image colorspace</li><li><a href="gmagick.getimagecompose.php">Gmagick::getimagecompose</a> — Returns the composite operator associated with the image</li><li><a href="gmagick.getimagedelay.php">Gmagick::getimagedelay</a> — Gets the image delay</li><li><a href="gmagick.getimagedepth.php">Gmagick::getimagedepth</a> — Gets the depth of the image</li><li><a href="gmagick.getimagedispose.php">Gmagick::getimagedispose</a> — Gets the image disposal method</li><li><a href="gmagick.getimageextrema.php">Gmagick::getimageextrema</a> — Gets the extrema for the image</li><li><a href="gmagick.getimagefilename.php">Gmagick::getimagefilename</a> — Returns the filename of a particular image in a sequence</li><li><a href="gmagick.getimageformat.php">Gmagick::getimageformat</a> — Returns the format of a particular image in a sequence</li><li><a href="gmagick.getimagegamma.php">Gmagick::getimagegamma</a> — Gets the image gamma</li><li><a href="gmagick.getimagegreenprimary.php">Gmagick::getimagegreenprimary</a> — Returns the chromaticy green primary point</li><li><a href="gmagick.getimageheight.php">Gmagick::getimageheight</a> — Returns the image height</li><li><a href="gmagick.getimagehistogram.php">Gmagick::getimagehistogram</a> — Gets the image histogram</li><li><a href="gmagick.getimageindex.php">Gmagick::getimageindex</a> — Gets the index of the current active image</li><li><a href="gmagick.getimageinterlacescheme.php">Gmagick::getimageinterlacescheme</a> — Gets the image interlace scheme</li><li><a href="gmagick.getimageiterations.php">Gmagick::getimageiterations</a> — Gets the image iterations</li><li><a href="gmagick.getimagematte.php">Gmagick::getimagematte</a> — Check if the image has a matte channel</li><li><a href="gmagick.getimagemattecolor.php">Gmagick::getimagemattecolor</a> — Returns the image matte color</li><li><a href="gmagick.getimageprofile.php">Gmagick::getimageprofile</a> — Returns the named image profile</li><li><a href="gmagick.getimageredprimary.php">Gmagick::getimageredprimary</a> — Returns the chromaticity red primary point</li><li><a href="gmagick.getimagerenderingintent.php">Gmagick::getimagerenderingintent</a> — Gets the image rendering intent</li><li><a href="gmagick.getimageresolution.php">Gmagick::getimageresolution</a> — Gets the image X and Y resolution</li><li><a href="gmagick.getimagescene.php">Gmagick::getimagescene</a> — Gets the image scene</li><li><a href="gmagick.getimagesignature.php">Gmagick::getimagesignature</a> — Generates an SHA-256 message digest</li><li><a href="gmagick.getimagetype.php">Gmagick::getimagetype</a> — Gets the potential image type</li><li><a href="gmagick.getimageunits.php">Gmagick::getimageunits</a> — Gets the image units of resolution</li><li><a href="gmagick.getimagewhitepoint.php">Gmagick::getimagewhitepoint</a> — Returns the chromaticity white point</li><li><a href="gmagick.getimagewidth.php">Gmagick::getimagewidth</a> — Returns the width of the image</li><li><a href="gmagick.getpackagename.php">Gmagick::getpackagename</a> — Returns the GraphicsMagick package name</li><li><a href="gmagick.getquantumdepth.php">Gmagick::getquantumdepth</a> — Returns the Gmagick quantum depth as a string</li><li><a href="gmagick.getreleasedate.php">Gmagick::getreleasedate</a> — Returns the GraphicsMagick release date as a string</li><li><a href="gmagick.getsamplingfactors.php">Gmagick::getsamplingfactors</a> — Gets the horizontal and vertical sampling factor</li><li><a href="gmagick.getsize.php">Gmagick::getsize</a> — Returns the size associated with the Gmagick object</li><li><a href="gmagick.getversion.php">Gmagick::getversion</a> — Returns the GraphicsMagick API version</li><li><a href="gmagick.hasnextimage.php">Gmagick::hasnextimage</a> — Checks if the object has more images</li><li><a href="gmagick.haspreviousimage.php">Gmagick::haspreviousimage</a> — Checks if the object has a previous image</li><li><a href="gmagick.implodeimage.php">Gmagick::implodeimage</a> — Creates a new image as a copy</li><li><a href="gmagick.labelimage.php">Gmagick::labelimage</a> — Adds a label to an image</li><li><a href="gmagick.levelimage.php">Gmagick::levelimage</a> — Adjusts the levels of an image</li><li><a href="gmagick.magnifyimage.php">Gmagick::magnifyimage</a> — Scales an image proportionally 2x</li><li><a href="gmagick.mapimage.php">Gmagick::mapimage</a> — Replaces the colors of an image with the closest color from a reference image</li><li><a href="gmagick.medianfilterimage.php">Gmagick::medianfilterimage</a> — Applies a digital filter</li><li><a href="gmagick.minifyimage.php">Gmagick::minifyimage</a> — Scales an image proportionally to half its size</li><li><a href="gmagick.modulateimage.php">Gmagick::modulateimage</a> — Control the brightness, saturation, and hue</li><li><a href="gmagick.motionblurimage.php">Gmagick::motionblurimage</a> — Simulates motion blur</li><li><a href="gmagick.newimage.php">Gmagick::newimage</a> — Creates a new image</li><li><a href="gmagick.nextimage.php">Gmagick::nextimage</a> — Moves to the next image</li><li><a href="gmagick.normalizeimage.php">Gmagick::normalizeimage</a> — Enhances the contrast of a color image</li><li><a href="gmagick.oilpaintimage.php">Gmagick::oilpaintimage</a> — Simulates an oil painting</li><li><a href="gmagick.previousimage.php">Gmagick::previousimage</a> — Move to the previous image in the object</li><li><a href="gmagick.profileimage.php">Gmagick::profileimage</a> — Adds or removes a profile from an image</li><li><a href="gmagick.quantizeimage.php">Gmagick::quantizeimage</a> — Analyzes the colors within a reference image</li><li><a href="gmagick.quantizeimages.php">Gmagick::quantizeimages</a> — The quantizeimages purpose</li><li><a href="gmagick.queryfontmetrics.php">Gmagick::queryfontmetrics</a> — Returns an array representing the font metrics</li><li><a href="gmagick.queryfonts.php">Gmagick::queryfonts</a> — Returns the configured fonts</li><li><a href="gmagick.queryformats.php">Gmagick::queryformats</a> — Returns formats supported by Gmagick</li><li><a href="gmagick.radialblurimage.php">Gmagick::radialblurimage</a> — Radial blurs an image</li><li><a href="gmagick.raiseimage.php">Gmagick::raiseimage</a> — Creates a simulated 3d button-like effect</li><li><a href="gmagick.read.php">Gmagick::read</a> — Reads image from filename</li><li><a href="gmagick.readimage.php">Gmagick::readimage</a> — Reads image from filename</li><li><a href="gmagick.readimageblob.php">Gmagick::readimageblob</a> — Reads image from a binary string</li><li><a href="gmagick.readimagefile.php">Gmagick::readimagefile</a> — The readimagefile purpose</li><li><a href="gmagick.reducenoiseimage.php">Gmagick::reducenoiseimage</a> — Smooths the contours of an image</li><li><a href="gmagick.removeimage.php">Gmagick::removeimage</a> — Removes an image from the image list</li><li><a href="gmagick.removeimageprofile.php">Gmagick::removeimageprofile</a> — Removes the named image profile and returns it</li><li><a href="gmagick.resampleimage.php">Gmagick::resampleimage</a> — Resample image to desired resolution</li><li><a href="gmagick.resizeimage.php">Gmagick::resizeimage</a> — Scales an image</li><li><a href="gmagick.rollimage.php">Gmagick::rollimage</a> — Offsets an image</li><li><a href="gmagick.rotateimage.php">Gmagick::rotateimage</a> — Rotates an image</li><li><a href="gmagick.scaleimage.php">Gmagick::scaleimage</a> — Scales the size of an image</li><li><a href="gmagick.separateimagechannel.php">Gmagick::separateimagechannel</a> — Separates a channel from the image</li><li><a href="gmagick.setcompressionquality.php">Gmagick::setCompressionQuality</a> — Sets the object's default compression quality</li><li><a href="gmagick.setfilename.php">Gmagick::setfilename</a> — Sets the filename before you read or write the image</li><li><a href="gmagick.setimagebackgroundcolor.php">Gmagick::setimagebackgroundcolor</a> — Sets the image background color</li><li><a href="gmagick.setimageblueprimary.php">Gmagick::setimageblueprimary</a> — Sets the image chromaticity blue primary point</li><li><a href="gmagick.setimagebordercolor.php">Gmagick::setimagebordercolor</a> — Sets the image border color</li><li><a href="gmagick.setimagechanneldepth.php">Gmagick::setimagechanneldepth</a> — Sets the depth of a particular image channel</li><li><a href="gmagick.setimagecolorspace.php">Gmagick::setimagecolorspace</a> — Sets the image colorspace</li><li><a href="gmagick.setimagecompose.php">Gmagick::setimagecompose</a> — Sets the image composite operator</li><li><a href="gmagick.setimagedelay.php">Gmagick::setimagedelay</a> — Sets the image delay</li><li><a href="gmagick.setimagedepth.php">Gmagick::setimagedepth</a> — Sets the image depth</li><li><a href="gmagick.setimagedispose.php">Gmagick::setimagedispose</a> — Sets the image disposal method</li><li><a href="gmagick.setimagefilename.php">Gmagick::setimagefilename</a> — Sets the filename of a particular image in a sequence</li><li><a href="gmagick.setimageformat.php">Gmagick::setimageformat</a> — Sets the format of a particular image</li><li><a href="gmagick.setimagegamma.php">Gmagick::setimagegamma</a> — Sets the image gamma</li><li><a href="gmagick.setimagegreenprimary.php">Gmagick::setimagegreenprimary</a> — Sets the image chromaticity green primary point</li><li><a href="gmagick.setimageindex.php">Gmagick::setimageindex</a> — Set the iterator to the position in the image list specified with the index parameter</li><li><a href="gmagick.setimageinterlacescheme.php">Gmagick::setimageinterlacescheme</a> — Sets the interlace scheme of the image</li><li><a href="gmagick.setimageiterations.php">Gmagick::setimageiterations</a> — Sets the image iterations</li><li><a href="gmagick.setimageprofile.php">Gmagick::setimageprofile</a> — Adds a named profile to the Gmagick object</li><li><a href="gmagick.setimageredprimary.php">Gmagick::setimageredprimary</a> — Sets the image chromaticity red primary point</li><li><a href="gmagick.setimagerenderingintent.php">Gmagick::setimagerenderingintent</a> — Sets the image rendering intent</li><li><a href="gmagick.setimageresolution.php">Gmagick::setimageresolution</a> — Sets the image resolution</li><li><a href="gmagick.setimagescene.php">Gmagick::setimagescene</a> — Sets the image scene</li><li><a href="gmagick.setimagetype.php">Gmagick::setimagetype</a> — Sets the image type</li><li><a href="gmagick.setimageunits.php">Gmagick::setimageunits</a> — Sets the image units of resolution</li><li><a href="gmagick.setimagewhitepoint.php">Gmagick::setimagewhitepoint</a> — Sets the image chromaticity white point</li><li><a href="gmagick.setsamplingfactors.php">Gmagick::setsamplingfactors</a> — Sets the image sampling factors</li><li><a href="gmagick.setsize.php">Gmagick::setsize</a> — Sets the size of the Gmagick object</li><li><a href="gmagick.shearimage.php">Gmagick::shearimage</a> — Creating a parallelogram</li><li><a href="gmagick.solarizeimage.php">Gmagick::solarizeimage</a> — Applies a solarizing effect to the image</li><li><a href="gmagick.spreadimage.php">Gmagick::spreadimage</a> — Randomly displaces each pixel in a block</li><li><a href="gmagick.stripimage.php">Gmagick::stripimage</a> — Strips an image of all profiles and comments</li><li><a href="gmagick.swirlimage.php">Gmagick::swirlimage</a> — Swirls the pixels about the center of the image</li><li><a href="gmagick.thumbnailimage.php">Gmagick::thumbnailimage</a> — Changes the size of an image</li><li><a href="gmagick.trimimage.php">Gmagick::trimimage</a> — Remove edges from the image</li><li><a href="gmagick.write.php">Gmagick::write</a> — Alias of Gmagick::writeimage</li><li><a href="gmagick.writeimage.php">Gmagick::writeimage</a> — Writes an image to the specified filename</li></ul></li><li><a href="class.gmagickdraw.php">GmagickDraw</a> — The GmagickDraw class<ul class="chunklist chunklist_book chunklist_children"><li><a href="gmagickdraw.annotate.php">GmagickDraw::annotate</a> — Draws text on the image</li><li><a href="gmagickdraw.arc.php">GmagickDraw::arc</a> — Draws an arc</li><li><a href="gmagickdraw.bezier.php">GmagickDraw::bezier</a> — Draws a bezier curve</li><li><a href="gmagickdraw.ellipse.php">GmagickDraw::ellipse</a> — Draws an ellipse on the image</li><li><a href="gmagickdraw.getfillcolor.php">GmagickDraw::getfillcolor</a> — Returns the fill color</li><li><a href="gmagickdraw.getfillopacity.php">GmagickDraw::getfillopacity</a> — Returns the opacity used when drawing</li><li><a href="gmagickdraw.getfont.php">GmagickDraw::getfont</a> — Returns the font</li><li><a href="gmagickdraw.getfontsize.php">GmagickDraw::getfontsize</a> — Returns the font pointsize</li><li><a href="gmagickdraw.getfontstyle.php">GmagickDraw::getfontstyle</a> — Returns the font style</li><li><a href="gmagickdraw.getfontweight.php">GmagickDraw::getfontweight</a> — Returns the font weight</li><li><a href="gmagickdraw.getstrokecolor.php">GmagickDraw::getstrokecolor</a> — Returns the color used for stroking object outlines</li><li><a href="gmagickdraw.getstrokeopacity.php">GmagickDraw::getstrokeopacity</a> — Returns the opacity of stroked object outlines</li><li><a href="gmagickdraw.getstrokewidth.php">GmagickDraw::getstrokewidth</a> — Returns the width of the stroke used to draw object outlines</li><li><a href="gmagickdraw.gettextdecoration.php">GmagickDraw::gettextdecoration</a> — Returns the text decoration</li><li><a href="gmagickdraw.gettextencoding.php">GmagickDraw::gettextencoding</a> — Returns the code set used for text annotations</li><li><a href="gmagickdraw.line.php">GmagickDraw::line</a> — Draws a line</li><li><a href="gmagickdraw.point.php">GmagickDraw::point</a> — Draws a point</li><li><a href="gmagickdraw.polygon.php">GmagickDraw::polygon</a> — Draws a polygon</li><li><a href="gmagickdraw.polyline.php">GmagickDraw::polyline</a> — Draws a polyline</li><li><a href="gmagickdraw.rectangle.php">GmagickDraw::rectangle</a> — Draws a rectangle</li><li><a href="gmagickdraw.rotate.php">GmagickDraw::rotate</a> — Applies the specified rotation to the current coordinate space</li><li><a href="gmagickdraw.roundrectangle.php">GmagickDraw::roundrectangle</a> — Draws a rounded rectangle</li><li><a href="gmagickdraw.scale.php">GmagickDraw::scale</a> — Adjusts the scaling factor</li><li><a href="gmagickdraw.setfillcolor.php">GmagickDraw::setfillcolor</a> — Sets the fill color to be used for drawing filled objects</li><li><a href="gmagickdraw.setfillopacity.php">GmagickDraw::setfillopacity</a> — The setfillopacity purpose</li><li><a href="gmagickdraw.setfont.php">GmagickDraw::setfont</a> — Sets the fully-specified font to use when annotating with text</li><li><a href="gmagickdraw.setfontsize.php">GmagickDraw::setfontsize</a> — Sets the font pointsize to use when annotating with text</li><li><a href="gmagickdraw.setfontstyle.php">GmagickDraw::setfontstyle</a> — Sets the font style to use when annotating with text</li><li><a href="gmagickdraw.setfontweight.php">GmagickDraw::setfontweight</a> — Sets the font weight</li><li><a href="gmagickdraw.setstrokecolor.php">GmagickDraw::setstrokecolor</a> — Sets the color used for stroking object outlines</li><li><a href="gmagickdraw.setstrokeopacity.php">GmagickDraw::setstrokeopacity</a> — Specifies the opacity of stroked object outlines</li><li><a href="gmagickdraw.setstrokewidth.php">GmagickDraw::setstrokewidth</a> — Sets the width of the stroke used to draw object outlines</li><li><a href="gmagickdraw.settextdecoration.php">GmagickDraw::settextdecoration</a> — Specifies a decoration</li><li><a href="gmagickdraw.settextencoding.php">GmagickDraw::settextencoding</a> — Specifies the text code set</li></ul></li><li><a href="class.gmagickpixel.php">GmagickPixel</a> — The GmagickPixel class<ul class="chunklist chunklist_book chunklist_children"><li><a href="gmagickpixel.construct.php">GmagickPixel::__construct</a> — The GmagickPixel constructor</li><li><a href="gmagickpixel.getcolor.php">GmagickPixel::getcolor</a> — Returns the color</li><li><a href="gmagickpixel.getcolorcount.php">GmagickPixel::getcolorcount</a> — Returns the color count associated with this color</li><li><a href="gmagickpixel.getcolorvalue.php">GmagickPixel::getcolorvalue</a> — Gets the normalized value of the provided color channel</li><li><a href="gmagickpixel.setcolor.php">GmagickPixel::setcolor</a> — Sets the color</li><li><a href="gmagickpixel.setcolorvalue.php">GmagickPixel::setcolorvalue</a> — Sets the normalized value of one of the channels</li></ul></li></ul></div><?php manual_footer($setup); ?>