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'From Smalltalk/X, Version:2.6.4 on 30-Apr-1993 at 18:40:58'!
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ImageReader subclass:#FaceReader
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instanceVariableNames:''
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classVariableNames:''
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poolDictionaries:''
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category:'Graphics-Support'
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!
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!FaceReader methodsFor:'reading from file'!
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fromFile:aFileName
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|line
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index "{ Class: SmallInteger }"
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dstIndex "{ Class: SmallInteger }"
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bytesPerRow
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lo "{ Class: SmallInteger }"
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hi "{ Class: SmallInteger }"
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val "{ Class: SmallInteger }"
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inHeader s depth|
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inStream := FileStream readonlyFileNamed:aFileName.
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inStream isNil ifTrue:[
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'open error' printNewline.
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^ nil
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].
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line := inStream nextLine.
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line isNil ifTrue:[
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inStream close.
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^ nil
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].
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inHeader := true.
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[inHeader] whileTrue:[
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(line startsWith:'Image:') ifTrue:[
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s := ReadStream on:line.
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s position:7.
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width := Number readFrom:s.
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height := Number readFrom:s.
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depth := Number readFrom:s.
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inHeader := false.
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].
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line := inStream nextLine
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].
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depth == 8 ifFalse:[
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self error:'only depth 8 supported'
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].
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[line isEmpty] whileTrue:[
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line := inStream nextLine.
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].
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bytesPerRow := width * depth // 8.
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((width * depth \\ 8) ~~ 0) ifTrue:[
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bytesPerRow := bytesPerRow + 1
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].
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1
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data := ByteArray uninitializedNew:(bytesPerRow * height).
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0
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dstIndex := data size.
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[line notNil] whileTrue:[
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1 to:(line size) by:2 do:[:cI |
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hi := (line at:cI) digitValue.
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lo := (line at:(cI + 1)) digitValue.
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val := (hi bitShift:4) bitOr:lo.
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data at:dstIndex put:val.
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dstIndex := dstIndex - 1
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].
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line := inStream nextLine
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].
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photometric := #whiteIs0.
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samplesPerPixel := 1.
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bitsPerSample := #(8)
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"FaceReader fromFile:'../goodies/faces/next.com/steve.face'"
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"this is NOT steve jobs :-)"
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! !
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