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'From Smalltalk/X, Version:2.10.8 on 9-nov-1995 at 17:56:18' !
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ImageReader subclass:#BlitImageReader
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instanceVariableNames:''
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classVariableNames:''
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poolDictionaries:''
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category:'Graphics-Images support'
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!
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!BlitImageReader class methodsFor:'documentation'!
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version
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"
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$Header: /cvs/stx/stx/libview2/BlitImageReader.st,v 1.2 1995-11-09 16:57:45 cg Exp $
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"Created: 9.11.1995 / 17:08:06 / cg"
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!
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documentation
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"
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A q&d hack to read 48x48x1 Blit images (faces)
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"
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"Created: 9.11.1995 / 17:08:06 / cg"
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"Modified: 9.11.1995 / 17:08:26 / cg"
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!
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examples
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"
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Image fromFile:'.../.../48x48x1'
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"
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"Created: 9.11.1995 / 17:08:06 / cg"
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"Modified: 9.11.1995 / 17:08:42 / cg"
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!
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history
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"Created: 9.11.1995 / 17:08:06 / cg"
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"Modified: 9.11.1995 / 17:08:06 / cg"
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! !
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!BlitImageReader class methodsFor:'initialization'!
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initialize
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Image fileFormats at:'48x48x1' put:self.
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"
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BlitImageReader initialize
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"
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"Created: 9.11.1995 / 17:05:04 / cg"
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"Modified: 9.11.1995 / 17:06:28 / cg"
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! !
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!BlitImageReader class methodsFor:'special formats'!
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fromCompressedString:aString
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"since I am not willing to include the uncompface stuff into ST/X,
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open a pipe to the uncompressor.
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If you dont have compface/uncompface, get it from your nearest ftp server."
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|f s img|
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f := Filename newTemporary.
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s := f writeStream.
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s nextPutAll:aString.
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s close.
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s := PipeStream readingFrom:('uncompface ' , f name).
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s isNil ifTrue:[
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'BLITIMGREADER: no uncompface utility.' errorPrintNL.
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^ nil
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].
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img := self fromStream:s.
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s close.
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^ img
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"
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|s|
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s := '
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Iqsa(US9p?)Y^W
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+6Ff[Z]<t?\A!!eaL''DG{20*#{C1;''Ct&}L}B^/1(aYI@hP)4!!<}7D=2gm
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8!!$T`8QNfK<te\20%A\`wm*wa2' , Character doubleQuote asString , '^Up*Qs' , Character doubleQuote asString ,
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'X}KeV*3XeB2te&sKp*t`N;^BDh[6=K{ZBE=O>rM' , Character doubleQuote asString , 'uFE)
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lFDjag1e]\/#2'.
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BlitImageReader fromCompressedString:s
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"
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"Created: 9.11.1995 / 17:55:19 / cg"
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"Modified: 9.11.1995 / 17:56:07 / cg"
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! !
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!BlitImageReader class methodsFor:'testing'!
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isValidImageFile:aFileName
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"return true, if aFileName contains a GIF image"
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^ aFileName = '48x48x1'
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"Created: 9.11.1995 / 17:04:29 / cg"
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! !
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!BlitImageReader methodsFor:'reading'!
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fromStream:aStream
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|line
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dstIndex "{ Class: SmallInteger }"
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bytesPerRow
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s words nm|
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width := height := 48.
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bytesPerRow := width // 8.
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data := ByteArray new:(bytesPerRow * height).
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dstIndex := 1.
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[aStream atEnd] whileFalse:[
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line := aStream nextLine.
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line notNil ifTrue:[
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words := (line asCollectionOfSubstringsSeparatedBy:$,) asOrderedCollection.
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words last isEmpty ifTrue:[
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words removeLast
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].
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words do:[:w |
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|s bits|
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s := w readStream.
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s skip:2.
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bits := Integer readFrom:s radix:16 onError:0.
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data at:dstIndex put:(bits bitShift:-8).
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data at:dstIndex+1 put:(bits bitAnd:16rFF).
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dstIndex := dstIndex + 2
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]
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]
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].
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photometric := #whiteIs0.
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samplesPerPixel := 1.
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bitsPerSample := #(1)
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"
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BlitImageReader fromFile:'/tmp/faces/facedir/facedir/misc./acsnet/48x48x1'
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"
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"Created: 9.11.1995 / 17:03:04 / cg"
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! !
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BlitImageReader initialize!
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