Gmagick::haspreviousimage
(PECL gmagick >= Unknown)
Gmagick::haspreviousimage — Checks if the object has a previous image
Description
Returns TRUE if the object has more images when traversing the list in the reverse direction
Parameters
This function has no parameters.
Return Values
Returns TRUE if the object has more images when traversing the list in the reverse direction, returns FALSE if there are none.
Errors/Exceptions
Throws an GmagickException on error.
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- Gmagick
- Функция Gmagick::addimage() - Adds new image to Gmagick object image list
- Функция Gmagick::addnoiseimage() - Adds random noise to the image
- Функция Gmagick::annotateimage() - Annotates an image with text
- Функция Gmagick::blurimage() - Adds blur filter to image
- Функция Gmagick::borderimage() - Surrounds the image with a border
- Функция Gmagick::charcoalimage() - Simulates a charcoal drawing
- Функция Gmagick::chopimage() - Removes a region of an image and trims
- Функция Gmagick::clear() - Clears all resources associated to Gmagick object
- Функция Gmagick::commentimage() - Adds a comment to your image
- Функция Gmagick::compositeimage() - Composite one image onto another
- Функция Gmagick::__construct() - The Gmagick constructor
- Функция Gmagick::cropimage() - Extracts a region of the image
- Функция Gmagick::cropthumbnailimage() - Creates a crop thumbnail
- Функция Gmagick::current() - The current purpose
- Функция Gmagick::cyclecolormapimage() - Displaces an image's colormap
- Функция Gmagick::deconstructimages() - Returns certain pixel differences between images
- Функция Gmagick::despeckleimage() - The despeckleimage purpose
- Функция Gmagick::destroy() - The destroy purpose
- Функция Gmagick::drawimage() - Renders the GmagickDraw object on the current image
- Функция Gmagick::edgeimage() - Enhance edges within the image
- Функция Gmagick::embossimage() - Returns a grayscale image with a three-dimensional effect
- Функция Gmagick::enhanceimage() - Improves the quality of a noisy image
- Функция Gmagick::equalizeimage() - Equalizes the image histogram
- Функция Gmagick::flipimage() - Creates a vertical mirror image
- Функция Gmagick::flopimage() - The flopimage purpose
- Функция Gmagick::frameimage() - Adds a simulated three-dimensional border
- Функция Gmagick::gammaimage() - Gamma-corrects an image
- Функция Gmagick::getcopyright() - Returns the GraphicsMagick API copyright as a string
- Функция Gmagick::getfilename() - The filename associated with an image sequence
- Функция Gmagick::getimagebackgroundcolor() - Returns the image background color
- Функция Gmagick::getimageblueprimary() - Returns the chromaticy blue primary point
- Функция Gmagick::getimagebordercolor() - Returns the image border color
- Функция Gmagick::getimagechanneldepth() - Gets the depth for a particular image channel
- Функция Gmagick::getimagecolors() - Returns the color of the specified colormap index
- Функция Gmagick::getimagecolorspace() - Gets the image colorspace
- Функция Gmagick::getimagecompose() - Returns the composite operator associated with the image
- Функция Gmagick::getimagedelay() - Gets the image delay
- Функция Gmagick::getimagedepth() - Gets the depth of the image
- Функция Gmagick::getimagedispose() - Gets the image disposal method
- Функция Gmagick::getimageextrema() - Gets the extrema for the image
- Функция Gmagick::getimagefilename() - Returns the filename of a particular image in a sequence
- Функция Gmagick::getimageformat() - Returns the format of a particular image in a sequence
- Функция Gmagick::getimagegamma() - Gets the image gamma
- Функция Gmagick::getimagegreenprimary() - Returns the chromaticy green primary point
- Функция Gmagick::getimageheight() - Returns the image height
- Функция Gmagick::getimagehistogram() - Gets the image histogram
- Функция Gmagick::getimageindex() - Gets the index of the current active image
- Функция Gmagick::getimageinterlacescheme() - Gets the image interlace scheme
- Функция Gmagick::getimageiterations() - Gets the image iterations
- Функция Gmagick::getimagematte() - Return if the image has a matte channel
- Функция Gmagick::getimagemattecolor() - Returns the image matte color
- Функция Gmagick::getimageprofile() - Returns the named image profile.
- Функция Gmagick::getimageredprimary() - Returns the chromaticity red primary point
- Функция Gmagick::getimagerenderingintent() - Gets the image rendering intent
- Функция Gmagick::getimageresolution() - Gets the image X and Y resolution
- Функция Gmagick::getimagescene() - Gets the image scene
- Функция Gmagick::getimagesignature() - Generates an SHA-256 message digest
- Функция Gmagick::getimagetype() - Gets the potential image type.
- Функция Gmagick::getimageunits() - Gets the image units of resolution
- Функция Gmagick::getimagewhitepoint() - Returns the chromaticity white point
- Функция Gmagick::getimagewidth() - Returns the width of the image
- Функция Gmagick::getpackagename() - Returns the GraphicsMagick package name.
- Функция Gmagick::getquantumdepth() - Returns the Gmagick quantum depth as a string.
- Функция Gmagick::getreleasedate() - Returns the GraphicsMagick release date as a string.
- Функция Gmagick::getsamplingfactors() - Gets the horizontal and vertical sampling factor.
- Функция Gmagick::getsize() - Returns the size associated with the Gmagick object
- Функция Gmagick::getversion() - Returns the GraphicsMagick API version
- Функция Gmagick::hasnextimage() - Checks if the object has more images
- Функция Gmagick::haspreviousimage() - Checks if the object has a previous image
- Функция Gmagick::implodeimage() - Creates a new image as a copy
- Функция Gmagick::labelimage() - Adds a label to an image.
- Функция Gmagick::levelimage() - Adjusts the levels of an image
- Функция Gmagick::magnifyimage() - Scales an image proportionally 2x
- Функция Gmagick::mapimage() - Replaces the colors of an image with the closest color from a reference image.
- Функция Gmagick::medianfilterimage() - Applies a digital filter
- Функция Gmagick::minifyimage() - Scales an image proportionally to half its size
- Функция Gmagick::modulateimage() - Control the brightness, saturation, and hue
- Функция Gmagick::motionblurimage() - Simulates motion blur
- Функция Gmagick::newimage() - Creates a new image
- Функция Gmagick::nextimage() - Moves to the next image
- Функция Gmagick::normalizeimage() - Enhances the contrast of a color image
- Функция Gmagick::oilpaintimage() - Simulates an oil painting
- Функция Gmagick::previousimage() - Move to the previous image in the object
- Функция Gmagick::profileimage() - Adds or removes a profile from an image
- Функция Gmagick::quantizeimage() - Analyzes the colors within a reference image
- Функция Gmagick::quantizeimages() - The quantizeimages purpose
- Функция Gmagick::queryfontmetrics() - Returns an array representing the font metrics
- Функция Gmagick::queryfonts() - Returns the configured fonts
- Функция Gmagick::queryformats() - Returns formats supported by Gmagick.
- Функция Gmagick::radialblurimage() - Radial blurs an image
- Функция Gmagick::raiseimage() - Creates a simulated 3d button-like effect
- Функция Gmagick::read() - Reads image from filename
- Функция Gmagick::readimage() - Reads image from filename
- Функция Gmagick::readimageblob() - Reads image from a binary string
- Функция Gmagick::readimagefile() - The readimagefile purpose
- Функция Gmagick::reducenoiseimage() - Smooths the contours of an image
- Функция Gmagick::removeimage() - Removes an image from the image list
- Функция Gmagick::removeimageprofile() - Removes the named image profile and returns it
- Функция Gmagick::resampleimage() - Resample image to desired resolution
- Функция Gmagick::resizeimage() - Scales an image
- Функция Gmagick::rollimage() - Offsets an image
- Функция Gmagick::rotateimage() - Rotates an image
- Функция Gmagick::scaleimage() - Scales the size of an image
- Функция Gmagick::separateimagechannel() - Separates a channel from the image
- Gmagick::setCompressionQuality
- Функция Gmagick::setfilename() - Sets the filename before you read or write the image
- Функция Gmagick::setimagebackgroundcolor() - Sets the image background color.
- Функция Gmagick::setimageblueprimary() - Sets the image chromaticity blue primary point.
- Функция Gmagick::setimagebordercolor() - Sets the image border color.
- Функция Gmagick::setimagechanneldepth() - Sets the depth of a particular image channel
- Функция Gmagick::setimagecolorspace() - Sets the image colorspace
- Функция Gmagick::setimagecompose() - Sets the image composite operator
- Функция Gmagick::setimagedelay() - Sets the image delay
- Функция Gmagick::setimagedepth() - Sets the image depth
- Функция Gmagick::setimagedispose() - Sets the image disposal method
- Функция Gmagick::setimagefilename() - Sets the filename of a particular image in a sequence
- Функция Gmagick::setimageformat() - Sets the format of a particular image
- Функция Gmagick::setimagegamma() - Sets the image gamma
- Функция Gmagick::setimagegreenprimary() - TSets the image chromaticity green primary point.
- Функция Gmagick::setimageindex() - Set the iterator to the position in the image list specified with the index parameter
- Функция Gmagick::setimageinterlacescheme() - Sets the interlace scheme of the image.
- Функция Gmagick::setimageiterations() - Sets the image iterations.
- Функция Gmagick::setimageprofile() - Adds a named profile to the Gmagick object
- Функция Gmagick::setimageredprimary() - Sets the image chromaticity red primary point.
- Функция Gmagick::setimagerenderingintent() - Sets the image rendering intent
- Функция Gmagick::setimageresolution() - Sets the image resolution
- Функция Gmagick::setimagescene() - Sets the image scene
- Функция Gmagick::setimagetype() - Sets the image type
- Функция Gmagick::setimageunits() - Sets the image units of resolution.
- Функция Gmagick::setimagewhitepoint() - Sets the image chromaticity white point.
- Функция Gmagick::setsamplingfactors() - Sets the image sampling factors.
- Функция Gmagick::setsize() - Sets the size of the Gmagick object
- Функция Gmagick::shearimage() - Creating a parallelogram
- Функция Gmagick::solarizeimage() - Applies a solarizing effect to the image
- Функция Gmagick::spreadimage() - Randomly displaces each pixel in a block
- Функция Gmagick::stripimage() - Strips an image of all profiles and comments
- Функция Gmagick::swirlimage() - Swirls the pixels about the center of the image
- Функция Gmagick::thumbnailimage() - Changes the size of an image
- Функция Gmagick::trimimage() - Remove edges from the image
- Функция Gmagick::write() - Writes an image to the specified filename
- Функция Gmagick::writeimage() - Writes an image to the specified filename
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