Script Library: 1213 scripts
 

imagemagick-helper.r

REBOL [ Title: "ImageMagick Support" Author: "Edgar Tolentino" Company: "Prolific Publishing, Inc." Date: 19-Aug-2006 File: %imagemagick-helper.r Purpose: {Support minimal needs for image processing using ImageMagick MagickWand and MagickCore DLLs Note: DLL's calls tend to change so this is specifically for version 6.2.9 Note: Original uses only MagickCore DLL. This version required MagickWand DLL because they moved the calls to a different DLL} Library: [ level: 'advanced platform: 'windows 'linux type: [demo module] domain: [animation external-library graphics] tested-under: [view/pro 1.3.2.3.1 XPHome ImageMagick-6.2.9-Q16] license: 'MIT support: none see-also: none ] ] homedir: %./ imagemagicklib: %CORE_RL_magick_.dll ; uncomment for windows version imagemagickwandlib: %CORE_RL_wand_.dll ; uncomment for windows version ; imagemagicklib: %/usr/lib/libMagick.so ; uncomment for linux version, try to find where it is installed ; imagemagickwandlib: %/usr/lib/libWand.so ; uncomment for linux version, try to find where it is installed integer-to-stringptr: func [ anyptr ][ change second first :anyptr [string!] ] ptr-to-integer: func [ anyptr ][ change second first :anyptr [integer!] ] dynstruct: func [ {creates a struct datatype based on input data} value [block!] /defval /local specs len cnt var t1 t2 t3 ][ var: make string! 0 t1: make block! 0 t2: make string! 0 t3: make block! 0 specs: make block! 0 len: length? value cnt: 0 repeat data value [ cnt: cnt + 1 var: rejoin ["p" cnt " "] t1: reduce [type? data] t2: rejoin [var mold :t1] t3: load t2 insert tail specs t3 ] either defval [ make struct! specs none ][ make struct! specs copy/deep value ] ] ExceptionInfo-def: [ severity [integer!] error_number [integer!] reason [integer!] description [integer!] signature [integer!] ] pExceptionInfo: make struct! ExceptionInfo-def none imMagick: load/library imagemagicklib imMagickW: load/library imagemagickwandlib ;; Magick Core calls func-im: func [ {Creates a lib routine for ImageMagick libarary} specs [block!] {lib function parameters} identifier [string!] {lib function name} ][ set to-word rejoin ["im" identifier] make routine! specs imMagick identifier ] ;; Magick Wand calls func-imw: func [ {Creates a lib routine for ImageMagick libarary} specs [block!] {lib function parameters} identifier [string!] {lib function name} ][ set to-word rejoin ["im" identifier] make routine! specs imMagickW identifier ] func-im [ {Initializes ImageMagick} lpargs [struct! []] {module path} ] "InitializeMagick" func-im [ {Releases ImageMagick} ] "DestroyMagick" func-im [ {Gets an exception structure handle} pexception [struct! []] {ptr to ptr to an exception structure} ] "GetExceptionInfo" func-im [ {Creates an ImageInfo if passed NULL} pimageinfo [integer!] {ptr to an ImageInfo structure} return: [integer!] {ptr to an ImageInfo structure} ] "CloneImageInfo" func-imw [ {Identifies information about passed image} pimageinfo [integer!] {ptr to an ImageInfo structure} argc [integer!] {number of arguments} pargv [struct! []] {array of strings} ptext [struct! []] {ptr to ptr} pexception [struct! []] {ptr to ptr to an exception structure} return: [integer!] {status} ] "IdentifyImageCommand" func-imw [ {Process convertion commands} pimageinfo [integer!] {ptr to an ImageInfo structure} argc [integer!] {number of arguments} pargv [struct! []] {array of strings} pnull [integer!] {NULL val} pexception [struct! []] {ptr to ptr to an exception structure} return: [integer!] {status} ] "ConvertImageCommand" func-imw [ {Process composition commands} pimageinfo [integer!] {ptr to an ImageInfo structure} argc [integer!] {number of arguments} pargv [struct! []] {array of strings} pnull [integer!] {NULL val} pexception [struct! []] {ptr to ptr to an exception structure} return: [integer!] {status} ] "CompositeImageCommand" func-imw [ {Process composition commands} pimageinfo [integer!] {ptr to an ImageInfo structure} argc [integer!] {number of arguments} pargv [struct! []] {array of strings} pnull [integer!] {NULL val} pexception [struct! []] {ptr to ptr to an exception structure} return: [integer!] {status} ] "MontageImageCommand" func-im [ {Releases the ptr to str created} ptext [integer!] {ptr to string} return: [integer!] ] "RelinquishMagickMemory" func-im [ {Allocates the memory requested} isize [integer!] {size of memory} return: [integer!] ] "AcquireMagickMemory" func-im [ {Releases the ImageInfo created} pimageinfo [integer!] {ptr to an ImageInfo structure} return: [integer!] ] "DestroyImageInfo" func-im [ {Releases the exception structure handle} pexception [struct! []] {ptr to ptr to an exception structure} ] "DestroyExceptionInfo" ; Add more dll calls here imInitialize: func [ {init imagemagick} ][ modpath: dynstruct/defval [""] imInitializeMagick modpath ] imIdentify: func [ {executes the commands strings} cmdstr [string!] {command strings for Convert} /local str argc argv argtext result emptystr retval mem ][ str: make block! 0 str: parse cmdstr none argc: length? str argv: dynstruct str mem: imAcquireMagickMemory 4 argtext: dynstruct/defval [mem] imGetExceptionInfo pExceptionInfo imInfo: imCloneImageInfo 0 retval: imIdentifyImageCommand imInfo argc argv argtext pExceptionInfo if all [retval argtext/p1 <> 0][ integer-to-stringptr argtext result: load to-string argtext/p1 ptr-to-integer argtext argtext/p1: imRelinquishMagickMemory argtext/p1 ] imInfo: imDestroyImageInfo imInfo imDestroyExceptionInfo pExceptionInfo result ] imIdentifyWHF: func [ {Identifies image width, height and format} filename [string!] {image filename to identify} /local str argc argv argtext result cmdstr imInfo retval ][ if not find filename "://" [ if not exists? to-rebol-file filename [ local: rejoin [homedir filename] either exists? local [filename: form local][ return copy "Identify : Identify failed!" ] ] ] cmdstr: rejoin [{identify -format "%w %h %m" } filename] str: make block! 0 str: parse cmdstr none argc: length? str argv: dynstruct str argtext: dynstruct/defval [0] imGetExceptionInfo pExceptionInfo imInfo: imCloneImageInfo 0 result: copy "Identify : Identify failed!" retval: imIdentifyImageCommand imInfo argc argv argtext pExceptionInfo if all [retval argtext/p1 <> 0][ integer-to-stringptr argtext result: load to-string argtext/p1 ptr-to-integer argtext argtext/p1: imRelinquishMagickMemory argtext/p1 ] imInfo: imDestroyImageInfo imInfo imDestroyExceptionInfo pExceptionInfo result ] imAction: func [ {executes the commands strings} cmdstr [string!] {command strings for Convert} /local str argc argv imInfo retval ][ str: make block! 0 str: parse cmdstr none argc: length? str outfn: pick str argc argv: dynstruct str imGetExceptionInfo pExceptionInfo imInfo: imCloneImageInfo 0 switch argv/p1 [ "convert" [ retval: imConvertImageCommand imInfo argc argv 0 pExceptionInfo ] "montage" [ retval: imMontageImageCommand imInfo argc argv 0 pExceptionInfo ] "composite" [ retval: imCompositeImageCommand imInfo argc argv 0 pExceptionInfo ] ] imInfo: imDestroyImageInfo imInfo imDestroyExceptionInfo pExceptionInfo ;for cnt 1 5000 1 [either NOT exists? to-file outfn [wait .02][break]] ;if NOT exists? to-file outfn [retval: 0] retval ] imRelease: func [ {release imagemagick} ][ imDestroyMagick ] ; test functions use start here comment [ imInitialize retval: imAction {convert logo: "logo.gif"} retstr: imIdentifyWHF {logo.gif} availfont: {Arial} ;{Helvetica} ;some installations has different font support. retval: imAction rejoin [{convert -background lightgray -font } availfont { -pointsize 9 "label: Edgardo Tolentino " "font.jpg"}] retstr: imIdentifyWHF {font.jpg} imRelease halt ;quit ] halt
halt ;; to terminate script if DO'ne from webpage
Notes