GD Functions

Table of Contents

• gd_info — Retrieve information about the currently installed GD library
• getimagesize — Get the size of an image
• image_type_to_extension — Get file extension for image type
• image_type_to_mime_type — Get Mime-Type for image-type returned by getimagesize, exif_read_data, exif_thumbnail, exif_imagetype
• image2wbmp ⬠Output image to browser or file
• imagealphablending ⬠Set the blending mode for an image
• imageantialias ⬠Should antialias functions be used or not
• imagearc ⬠Draws an arc
• imagechar ⬠Draw a character horizontally
• imagecharup ⬠Draw a character vertically
• imagecolorallocate ⬠Allocate a color for an image
• imagecolorallocatealpha ⬠Allocate a color for an image
• imagecolorat ⬠Get the index of the color of a pixel
• imagecolorclosest ⬠Get the index of the closest color to the specified color
• imagecolorclosestalpha ⬠Get the index of the closest color to the specified color + alpha
• imagecolorclosesthwb ⬠Get the index of the color which has the hue, white and blackness
• imagecolordeallocate ⬠De-allocate a color for an image
• imagecolorexact ⬠Get the index of the specified color
• imagecolorexactalpha ⬠Get the index of the specified color + alpha
• imagecolormatch ⬠Makes the colors of the palette version of an image more closely match the true color version
• imagecolorresolve ⬠Get the index of the specified color or its closest possible alternative
• imagecolorresolvealpha ⬠Get the index of the specified color + alpha or its closest possible alternative
• imagecolorset ⬠Set the color for the specified palette index
• imagecolorsforindex ⬠Get the colors for an index
• imagecolorstotal ⬠Find out the number of colors in an image's palette
• imagecolortransparent ⬠Define a color as transparent
• imageconvolution ⬠Apply a 3x3 convolution matrix, using coefficient and offset
• imagecopy ⬠Copy part of an image
• imagecopymerge ⬠Copy and merge part of an image
• imagecopymergegray ⬠Copy and merge part of an image with gray scale
• imagecopyresampled ⬠Copy and resize part of an image with resampling
• imagecopyresized ⬠Copy and resize part of an image
• imagecreate ⬠Create a new palette based image
• imagecreatefromgd2 ⬠Create a new image from GD2 file or URL
• imagecreatefromgd2part ⬠Create a new image from a given part of GD2 file or URL
• imagecreatefromgd ⬠Create a new image from GD file or URL
• imagecreatefromgif ⬠Create a new image from file or URL
• imagecreatefromjpeg ⬠Create a new image from file or URL
• imagefilledarc ⬠Draw a partial arc and fill it
• imagefilledellipse ⬠Draw a filled ellipse
• imagefilledpolygon ⬠Draw a filled polygon
• imagefilledrectangle ⬠Draw a filled rectangle
• imagefilltoborder ⬠Flood fill to specific color
• imagefilter ⬠Applies a filter to an image
• imagefontheight ⬠Get font height
• imagefontwidth ⬠Get font width
• imageftbbox ⬠Give the bounding box of a text using fonts via freetype2
• imagefttext ⬠Write text to the image using fonts using FreeType 2
• imagegammacorrect ⬠Apply a gamma correction to a GD image
• imagegd2 ⬠Output GD2 image to browser or file
• imagegd ⬠Output GD image to browser or file
• imagegif ⬠Output image to browser or file
• imagegrabscreen ⬠Captures the whole screen
• imagegrabwindow ⬠Captures a window
• imageinterlace ⬠Enable or disable interlace
• imageistruecolor ⬠Finds whether an image is a truecolor image
• imagejpeg ⬠Output image to browser or file
• imagelayereffect ⬠Set the alpha blending flag to use the bundled libgd layering effects
• imageline ⬠Draw a line
• imageloadfont ⬠Load a new font
• imagepalettecopy ⬠Copy the palette from one image to another
• imagepng ⬠Output a PNG image to either the browser or a file
• imagepolygon ⬠Draws a polygon
• imagepsbbox ⬠Give the bounding box of a text rectangle using PostScript Type1 fonts
• imagepsencodefont ⬠Change the character encoding vector of a font
• imagepsextendfont ⬠Extend or condense a font
• imagepsfreefont ⬠Free memory used by a PostScript Type 1 font
• imagepsloadfont ⬠Load a PostScript Type 1 font from file
• imagepsslantfont ⬠Slant a font
• imagepstext ⬠Draws a text over an image using PostScript Type1 fonts
• imagerectangle ⬠Draw a rectangle
• imagerotate ⬠Rotate an image with a given angle
• imagesavealpha ⬠Set the flag to save full alpha channel information (as opposed to single-color transparency) when saving PNG images
• imagesetbrush ⬠Set the brush image for line drawing
• imagesetpixel ⬠Set a single pixel
• imagesetstyle ⬠Set the style for line drawing
• imagesetthickness ⬠Set the thickness for line drawing
• iptcembed — Embed binary IPTC data into a JPEG image
• iptcparse — Parse a binary IPTC block into single tags.
• jpeg2wbmp — Convert JPEG image file to WBMP image file
• png2wbmp — Convert PNG image file to WBMP image file