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"
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6
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COPYRIGHT (c) 1991 by Claus Gittinger
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All Rights Reserved
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This software is furnished under a license and may be used
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only in accordance with the terms of that license and with the
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inclusion of the above copyright notice. This software may not
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be provided or otherwise made available to, or used by, any
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other person. No title to or ownership of the software is
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hereby transferred.
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"
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ImageReader subclass:#TIFFReader
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instanceVariableNames:'planarConfiguration
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subFileType stripOffsets rowsPerStrip
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fillOrder compression group3options predictor
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stripByteCounts
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currentOffset
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stripOffsetsPos stripByteCountsPos bitsPerSamplePos
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colorMapPos'
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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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TIFFReader comment:'
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COPYRIGHT (c) 1991 by Claus Gittinger
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All Rights Reserved
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$Header: /cvs/stx/stx/libview2/TIFFReader.st,v 1.5 1993-12-11 01:33:46 claus Exp $
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written Summer 91 by claus
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'!
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34 |
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35 |
!TIFFReader class methodsFor:'documentation'!
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37 |
documentation
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38 |
"
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3
|
39 |
This class knows how to read TIFF files and how to
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40 |
write uncompressed TIFF files.
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41 |
Only single image files are supported.
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Currently, not all formats are implemented, and of
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those that are not all are tested.
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0
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It should work with most rgb, mono and 2-plane greyscale
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45 |
images, since this is what I have as test material on
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the NeXT.
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3
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It supports reading of uncompressed, LZW and G3 compressed
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images; JPEG and pacbits are currently not implemented.
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Only writing of uncompressed images is currently implemented.
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More formats will come ...
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"
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! !
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3
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!TIFFReader 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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|inStream char1 char2 version|
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11
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inStream := self streamReadingFile:aFileName.
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3
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inStream isNil ifTrue:[^ false].
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char1 := inStream next.
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char2 := inStream next.
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66 |
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((char1 ~~ char2) or:[(char1 ~~ $I) and:[char1 ~~ $M]]) ifTrue:[
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inStream close.
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^ false
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].
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71 |
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inStream binary.
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version := inStream nextShortMSB:(char1 == $M).
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inStream close.
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(version ~~ 42) ifTrue:[^ false].
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^ true
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! !
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!TIFFReader methodsFor:'reading from file'!
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fromFile:aFileName
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3
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"read an image from aFileName"
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|char1 char2 version
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numberOfTags "{ Class: SmallInteger }"
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tagType "{ Class: SmallInteger }"
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numberType "{ Class: SmallInteger }"
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length "{ Class: SmallInteger }"
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result offset ok|
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inStream := self class streamReadingFile:aFileName.
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inStream isNil ifTrue:[^ nil].
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0
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char1 := inStream next.
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char2 := inStream next.
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(char1 ~~ char2) ifTrue:[
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'not a tiff file' printNewline.
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inStream close.
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^ nil
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].
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(char1 == $I) ifTrue:[
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byteOrder := #lsb
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] ifFalse:[
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(char1 == $M) ifTrue:[
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byteOrder := #msb
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] ifFalse:[
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'not a tiff file' printNewline.
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inStream close.
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^ nil
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]
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].
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3
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inStream binary.
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version := self readShort.
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(version ~~ 42) ifTrue:[
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'version of tiff-file not supported' printNewline.
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inStream close.
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^ nil
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].
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"setup default values"
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compression := 1. "none"
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fillOrder := #msb.
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planarConfiguration := 1.
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photometric := nil.
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bitsPerSample := 1.
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samplesPerPixel := 1.
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width := nil.
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height := nil.
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stripOffsets := nil.
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rowsPerStrip := nil.
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"resolutionUnit := 2."
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predictor := 1.
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offset := self readLong + 1.
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inStream position:offset.
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140 |
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numberOfTags := self readShort.
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3
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1 to:numberOfTags do:[:index |
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0
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tagType := self readShort.
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numberType := self readShort.
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length := self readLong.
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3
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self decodeTiffTag:tagType numberType:numberType length:length
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0
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].
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148 |
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offset := self readLong.
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(offset ~~ 0) ifTrue:[
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'more tags ignored' printNewline
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].
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153 |
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3
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"check for required tags"
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ok := true.
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width isNil ifTrue:[
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157 |
'missing width tag' printNewline.
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ok := false
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].
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160 |
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height isNil ifTrue:[
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162 |
'missing length tag' printNewline.
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ok := false
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].
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165 |
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photometric isNil ifTrue:[
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'missing photometric tag' printNewline.
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ok := false
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].
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170 |
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stripOffsets isNil ifTrue:[
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172 |
'missing stripOffsets tag' printNewline.
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ok := false
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].
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175 |
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ok ifFalse:[
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inStream close.
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^ nil
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].
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180 |
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181 |
"given all the information, read the bits"
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182 |
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rowsPerStrip isNil ifTrue:[
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rowsPerStrip := height
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185 |
].
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186 |
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187 |
(compression == 1) ifTrue:[
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188 |
result := self readUncompressedTiffImageData
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] ifFalse:[
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190 |
(compression == 5) ifTrue:[
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191 |
result := self readLZWTiffImageData
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192 |
] ifFalse:[
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193 |
(compression == 2) ifTrue:[
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194 |
"result := self readCCITT3ModHuffmanTiffImageData"
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195 |
'ccitt mod Huffman compression not implemented' printNewline
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196 |
] ifFalse:[
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197 |
(compression == 3) ifTrue:[
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198 |
result := self readCCITTGroup3TiffImageData
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|
199 |
] ifFalse:[
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200 |
(compression == 4) ifTrue:[
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201 |
"result := self readCCITTGroup4TiffImageData"
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202 |
'ccitt group4 fax compression not implemented' printNewline
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203 |
] ifFalse:[
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204 |
(compression == 32773) ifTrue:[
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205 |
result := self readPackbitsTiffImageData
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206 |
] ifFalse:[
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207 |
(compression == 32865) ifTrue:[
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208 |
result := self readJPEGTiffImageData
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209 |
] ifFalse:[
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3
|
210 |
'compression type ' , compression printString , ' not known' printNewline
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0
|
211 |
]
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212 |
]
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213 |
]
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214 |
]
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]
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]
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217 |
].
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218 |
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inStream close.
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^ result
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221 |
! !
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222 |
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223 |
!TIFFReader methodsFor:'writing to file'!
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224 |
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225 |
save:image onFile:aFileName
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3
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226 |
"save image as (uncompressed) TIFF file on aFileName"
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0
|
227 |
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228 |
|pos1 pos|
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229 |
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230 |
outStream := FileStream newFileNamed:aFileName.
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231 |
outStream isNil ifTrue:[
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232 |
'create error' printNewline.
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233 |
^ nil
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234 |
].
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235 |
|
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3
|
236 |
"save as msb"
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237 |
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0
|
238 |
byteOrder := #msb.
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3
|
239 |
"
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240 |
byteOrder := #lsb.
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241 |
"
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0
|
242 |
fillOrder := #msb.
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243 |
width := image width.
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244 |
height := image height.
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245 |
photometric := image photometric.
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246 |
samplesPerPixel := image samplesPerPixel.
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247 |
bitsPerSample := image bitsPerSample.
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248 |
colorMap := image colorMap.
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|
249 |
planarConfiguration := 1.
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|
250 |
compression := 1. "none"
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|
251 |
data := image bits.
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252 |
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253 |
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|
254 |
currentOffset := 0.
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255 |
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3
|
256 |
(byteOrder == #msb) ifTrue:[
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|
257 |
outStream nextPut:$M.
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|
258 |
outStream nextPut:$M.
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|
259 |
] ifFalse:[
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|
260 |
outStream nextPut:$I.
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|
261 |
outStream nextPut:$I.
|
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|
262 |
].
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0
|
263 |
currentOffset := currentOffset + 2.
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264 |
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265 |
outStream binary.
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266 |
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3
|
267 |
self writeShort:42.
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0
|
268 |
currentOffset := currentOffset + 2.
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269 |
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|
270 |
pos1 := outStream position.
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3
|
271 |
self writeLong:0. "start of tags - filled in later"
|
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0
|
272 |
currentOffset := currentOffset + 4.
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273 |
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|
274 |
"output strips"
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275 |
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276 |
self writeBits. "this outputs bits as strips, sets stripOffsets and stripByteCounts"
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277 |
self writeStripOffsets. "this outputs strip offsets, sets stripOffsetsPos"
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278 |
self writeStripByteCounts. "this outputs strip bytecounts, sets stripByteCountPos"
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279 |
self writeBitsPerSample. "this outputs bitsPerSample, sets bitsPerSamplePos"
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|
280 |
photometric == #palette ifTrue:[
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|
281 |
self writeColorMap "this outputs colorMap, sets colorMapPos"
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|
282 |
].
|
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|
283 |
|
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3
|
284 |
pos := outStream position. "backpatch tag offset"
|
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0
|
285 |
outStream position:pos1.
|
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3
|
286 |
self writeLong:(pos - 1). "fill in tag offset"
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0
|
287 |
outStream position:pos.
|
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3
|
288 |
"
|
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0
|
289 |
('patch tag offset at: ', (pos1 printStringRadix:16) , ' to ',
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|
290 |
(pos printStringRadix:16)) printNewline.
|
|
3
|
291 |
"
|
|
0
|
292 |
"output tag data"
|
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293 |
|
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|
294 |
photometric == #palette ifTrue:[
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3
|
295 |
self writeShort:9. "9 tags"
|
|
0
|
296 |
] ifFalse:[
|
|
3
|
297 |
self writeShort:8. "8 tags"
|
|
0
|
298 |
].
|
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|
299 |
self writeTag:256. "image width"
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|
300 |
self writeTag:257. "image height"
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|
301 |
self writeTag:258. "bits per sample"
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|
302 |
self writeTag:259. "compression"
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|
303 |
self writeTag:262. "photometric"
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|
304 |
self writeTag:273. "strip offsets"
|
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|
305 |
self writeTag:279. "strip byte counts"
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|
306 |
self writeTag:284. "planarconfig"
|
|
|
307 |
photometric == #palette ifTrue:[
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|
308 |
self writeTag:320 "colorMap"
|
|
|
309 |
].
|
|
3
|
310 |
self writeLong:0. "end of tags mark"
|
|
0
|
311 |
! !
|
|
|
312 |
|
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|
313 |
!TIFFReader methodsFor:'private'!
|
|
|
314 |
|
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|
315 |
readLongs:n
|
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|
316 |
|oldPos offset values|
|
|
|
317 |
|
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|
318 |
values := Array new:n.
|
|
|
319 |
(n == 1) ifTrue:[
|
|
3
|
320 |
values at:1 put:self readLong.
|
|
0
|
321 |
] ifFalse:[
|
|
|
322 |
offset := self readLong.
|
|
|
323 |
oldPos := inStream position.
|
|
|
324 |
inStream position:(offset + 1).
|
|
|
325 |
1 to:n do:[:index |
|
|
3
|
326 |
values at:index put:self readLong
|
|
0
|
327 |
].
|
|
|
328 |
inStream position:oldPos
|
|
|
329 |
].
|
|
|
330 |
^ values
|
|
|
331 |
!
|
|
|
332 |
|
|
|
333 |
writeLongs:longs
|
|
|
334 |
1 to:longs size do:[:l |
|
|
|
335 |
self writeLong:l
|
|
|
336 |
]
|
|
|
337 |
!
|
|
|
338 |
|
|
|
339 |
readShorts:n
|
|
|
340 |
|oldPos offset values|
|
|
|
341 |
|
|
|
342 |
values := Array new:n.
|
|
|
343 |
(n <= 2) ifTrue:[
|
|
3
|
344 |
values at:1 put:self readShort.
|
|
0
|
345 |
(n == 2) ifTrue:[
|
|
3
|
346 |
values at:2 put:self readShort
|
|
0
|
347 |
] ifFalse:[
|
|
|
348 |
self readShort
|
|
|
349 |
]
|
|
|
350 |
] ifFalse:[
|
|
|
351 |
offset := self readLong.
|
|
|
352 |
oldPos := inStream position.
|
|
|
353 |
inStream position:(offset + 1).
|
|
|
354 |
1 to:n do:[:index |
|
|
3
|
355 |
values at:index put:self readShort
|
|
0
|
356 |
].
|
|
|
357 |
inStream position:oldPos
|
|
|
358 |
].
|
|
|
359 |
^ values
|
|
|
360 |
!
|
|
|
361 |
|
|
|
362 |
readChars:n
|
|
|
363 |
|oldPos offset string|
|
|
|
364 |
|
|
|
365 |
string := String new:(n - 1).
|
|
|
366 |
(n <= 4) ifTrue:[
|
|
|
367 |
inStream nextBytes:(n - 1) into:string
|
|
|
368 |
] ifFalse:[
|
|
|
369 |
offset := self readLong.
|
|
|
370 |
oldPos := inStream position.
|
|
|
371 |
inStream position:(offset + 1).
|
|
|
372 |
inStream nextBytes:(n - 1) into:string.
|
|
|
373 |
inStream position:oldPos
|
|
|
374 |
].
|
|
|
375 |
^ string
|
|
|
376 |
!
|
|
|
377 |
|
|
|
378 |
readFracts:cnt
|
|
|
379 |
|oldPos offset values n d|
|
|
|
380 |
|
|
|
381 |
values := Array new:cnt.
|
|
|
382 |
offset := self readLong.
|
|
|
383 |
oldPos := inStream position.
|
|
|
384 |
inStream position:(offset + 1).
|
|
|
385 |
1 to:cnt do:[:index |
|
|
|
386 |
n := self readLong.
|
|
|
387 |
d := self readLong.
|
|
|
388 |
values at:index put:(Fraction numerator:n denominator:d)
|
|
|
389 |
].
|
|
|
390 |
inStream position:oldPos.
|
|
|
391 |
^ values
|
|
|
392 |
!
|
|
|
393 |
|
|
|
394 |
decodeTiffTag:tagType numberType:numberType length:length
|
|
|
395 |
|offset value valueArray
|
|
|
396 |
val
|
|
|
397 |
n "{ Class: SmallInteger }" |
|
|
|
398 |
|
|
|
399 |
(numberType == 3) ifTrue:[
|
|
|
400 |
"short"
|
|
|
401 |
valueArray := self readShorts:length.
|
|
|
402 |
value := valueArray at:1
|
|
|
403 |
] ifFalse:[
|
|
|
404 |
(numberType == 4) ifTrue:[
|
|
|
405 |
"integer"
|
|
|
406 |
valueArray := self readLongs:length.
|
|
|
407 |
value := valueArray at:1
|
|
|
408 |
] ifFalse:[
|
|
|
409 |
(numberType == 2) ifTrue:[
|
|
|
410 |
"character"
|
|
|
411 |
value := self readChars:length
|
|
|
412 |
] ifFalse:[
|
|
|
413 |
(numberType == 5) ifTrue:[
|
|
|
414 |
"fraction"
|
|
|
415 |
valueArray := self readFracts:length.
|
|
|
416 |
value := valueArray at:1
|
|
|
417 |
] ifFalse:[
|
|
|
418 |
offset := self readLong
|
|
|
419 |
]
|
|
|
420 |
]
|
|
|
421 |
]
|
|
|
422 |
].
|
|
|
423 |
|
|
|
424 |
(tagType == 254) ifTrue:[
|
|
|
425 |
"NewSubfileType"
|
|
|
426 |
"newSubFileType := value."
|
|
|
427 |
'newSubfiletype ' print. value printNewline.
|
|
|
428 |
^ self
|
|
|
429 |
].
|
|
|
430 |
(tagType == 255) ifTrue:[
|
|
|
431 |
"SubfileType"
|
|
|
432 |
subFileType := value.
|
|
|
433 |
'subfiletype ' print. value printNewline.
|
|
|
434 |
^ self
|
|
|
435 |
].
|
|
|
436 |
(tagType == 256) ifTrue:[
|
|
|
437 |
"ImageWidth"
|
|
|
438 |
width := value.
|
|
|
439 |
'width ' print. width printNewline.
|
|
|
440 |
^ self
|
|
|
441 |
].
|
|
|
442 |
(tagType == 257) ifTrue:[
|
|
|
443 |
"ImageHeight"
|
|
|
444 |
height := value.
|
|
|
445 |
'height ' print. height printNewline.
|
|
|
446 |
^ self
|
|
|
447 |
].
|
|
|
448 |
(tagType == 258) ifTrue:[
|
|
|
449 |
"bitspersample"
|
|
|
450 |
bitsPerSample := valueArray.
|
|
|
451 |
'bitspersample ' print. bitsPerSample printNewline.
|
|
|
452 |
^ self
|
|
|
453 |
].
|
|
|
454 |
(tagType == 259) ifTrue:[
|
|
|
455 |
"compression"
|
|
|
456 |
compression := value.
|
|
|
457 |
'compression ' print. compression printNewline.
|
|
|
458 |
^ self
|
|
|
459 |
].
|
|
|
460 |
(tagType == 262) ifTrue:[
|
|
|
461 |
"photometric"
|
|
|
462 |
(value == 0) ifTrue:[
|
|
|
463 |
photometric := #whiteIs0
|
|
|
464 |
] ifFalse:[
|
|
|
465 |
(value == 1) ifTrue:[
|
|
|
466 |
photometric := #blackIs0
|
|
|
467 |
] ifFalse:[
|
|
|
468 |
(value == 2) ifTrue:[
|
|
|
469 |
photometric := #rgb
|
|
|
470 |
] ifFalse:[
|
|
|
471 |
(value == 3) ifTrue:[
|
|
|
472 |
photometric := #palette
|
|
|
473 |
] ifFalse:[
|
|
|
474 |
(value == 4) ifTrue:[
|
|
|
475 |
photometric := #transparency
|
|
|
476 |
] ifFalse:[
|
|
|
477 |
photometric := nil
|
|
|
478 |
]
|
|
|
479 |
]
|
|
|
480 |
]
|
|
|
481 |
]
|
|
|
482 |
].
|
|
|
483 |
'photometric ' print. photometric printNewline.
|
|
|
484 |
^ self
|
|
|
485 |
].
|
|
|
486 |
(tagType == 263) ifTrue:[
|
|
|
487 |
"Treshholding"
|
|
|
488 |
"threshholding := value."
|
|
|
489 |
'treshholding ' print. value printNewline.
|
|
|
490 |
^ self
|
|
|
491 |
].
|
|
|
492 |
(tagType == 264) ifTrue:[
|
|
|
493 |
"CellWidth"
|
|
|
494 |
"cellWidth:= value."
|
|
|
495 |
'cellWidth ' print. value printNewline.
|
|
|
496 |
^ self
|
|
|
497 |
].
|
|
|
498 |
(tagType == 265) ifTrue:[
|
|
|
499 |
"CellLength"
|
|
|
500 |
"cellLength:= value."
|
|
|
501 |
'cellLength ' print. value printNewline.
|
|
|
502 |
^ self
|
|
|
503 |
].
|
|
|
504 |
(tagType == 266) ifTrue:[
|
|
|
505 |
"fillOrder"
|
|
|
506 |
(value == 1) ifTrue:[
|
|
|
507 |
fillOrder := #msb
|
|
|
508 |
] ifFalse:[
|
|
|
509 |
(value == 2) ifTrue:[
|
|
|
510 |
fillOrder := #lsb
|
|
|
511 |
] ifFalse:[
|
|
|
512 |
fillOrder := nil
|
|
|
513 |
]
|
|
|
514 |
].
|
|
|
515 |
'fillorder ' print. fillOrder printNewline.
|
|
|
516 |
^ self
|
|
|
517 |
].
|
|
|
518 |
(tagType == 269) ifTrue:[
|
|
|
519 |
"documentName"
|
|
|
520 |
'documentName ' print. value printNewline.
|
|
|
521 |
^ self
|
|
|
522 |
].
|
|
|
523 |
(tagType == 270) ifTrue:[
|
|
|
524 |
"imageDescription"
|
|
|
525 |
'imageDescription ' print. value printNewline.
|
|
|
526 |
^ self
|
|
|
527 |
].
|
|
|
528 |
(tagType == 271) ifTrue:[
|
|
|
529 |
"make"
|
|
|
530 |
'make ' print. value printNewline.
|
|
|
531 |
^ self
|
|
|
532 |
].
|
|
|
533 |
(tagType == 272) ifTrue:[
|
|
|
534 |
"model"
|
|
|
535 |
'model ' print. value printNewline.
|
|
|
536 |
^ self
|
|
|
537 |
].
|
|
|
538 |
(tagType == 273) ifTrue:[
|
|
|
539 |
"stripoffsets"
|
|
|
540 |
stripOffsets := valueArray.
|
|
|
541 |
'stripOffsets Array(' print. stripOffsets size print. ')' printNewline.
|
|
|
542 |
^ self
|
|
|
543 |
].
|
|
|
544 |
(tagType == 274) ifTrue:[
|
|
|
545 |
"Orientation"
|
|
|
546 |
"orientation:= value."
|
|
|
547 |
'orientation ' print. value printNewline.
|
|
|
548 |
^ self
|
|
|
549 |
].
|
|
|
550 |
(tagType == 277) ifTrue:[
|
|
|
551 |
"samplesPerPixel"
|
|
|
552 |
samplesPerPixel := value.
|
|
|
553 |
'samplesperpixel ' print. samplesPerPixel printNewline.
|
|
|
554 |
^ self
|
|
|
555 |
].
|
|
|
556 |
(tagType == 278) ifTrue:[
|
|
|
557 |
"rowsperstrip"
|
|
|
558 |
rowsPerStrip := value.
|
|
|
559 |
'rowsperstrip ' print. rowsPerStrip printNewline.
|
|
|
560 |
^ self
|
|
|
561 |
].
|
|
|
562 |
(tagType == 279) ifTrue:[
|
|
|
563 |
"stripbytecount"
|
|
|
564 |
stripByteCounts := valueArray.
|
|
|
565 |
'stripByteCounts Array(' print.
|
|
|
566 |
stripByteCounts size print.
|
|
|
567 |
')' printNewline.
|
|
|
568 |
^ self
|
|
|
569 |
].
|
|
|
570 |
(tagType == 280) ifTrue:[
|
|
|
571 |
"MinSampleValue"
|
|
|
572 |
"minSampleValue:= value."
|
|
|
573 |
'minSampleValue ' print. value printNewline.
|
|
|
574 |
^ self
|
|
|
575 |
].
|
|
|
576 |
(tagType == 281) ifTrue:[
|
|
|
577 |
"MaxSampleValue"
|
|
|
578 |
"maxSampleValue:= value."
|
|
|
579 |
'maxSampleValue ' print. value printNewline.
|
|
|
580 |
^ self
|
|
|
581 |
].
|
|
|
582 |
(tagType == 282) ifTrue:[
|
|
|
583 |
"xResolution"
|
|
|
584 |
'xres ' print. value printNewline.
|
|
|
585 |
^ self
|
|
|
586 |
].
|
|
|
587 |
(tagType == 283) ifTrue:[
|
|
|
588 |
"yResolution"
|
|
|
589 |
'yres ' print. value printNewline.
|
|
|
590 |
^ self
|
|
|
591 |
].
|
|
|
592 |
(tagType == 284) ifTrue:[
|
|
|
593 |
"planarconfig"
|
|
|
594 |
(value == 1) ifTrue:[
|
|
|
595 |
planarConfiguration := 1
|
|
|
596 |
] ifFalse:[
|
|
|
597 |
(value == 2) ifTrue:[
|
|
|
598 |
planarConfiguration := 2
|
|
|
599 |
] ifFalse:[
|
|
|
600 |
planarConfiguration := nil
|
|
|
601 |
]
|
|
|
602 |
].
|
|
|
603 |
'planarconfig ' print. planarConfiguration printNewline.
|
|
|
604 |
^ self
|
|
|
605 |
].
|
|
|
606 |
(tagType == 285) ifTrue:[
|
|
|
607 |
"pageName"
|
|
|
608 |
'pageName ' print. value printNewline.
|
|
|
609 |
^ self
|
|
|
610 |
].
|
|
|
611 |
(tagType == 286) ifTrue:[
|
|
|
612 |
"xPosition"
|
|
|
613 |
'xPos ' print. value printNewline.
|
|
|
614 |
^ self
|
|
|
615 |
].
|
|
|
616 |
(tagType == 287) ifTrue:[
|
|
|
617 |
"yPosition"
|
|
|
618 |
'yPos ' print. value printNewline.
|
|
|
619 |
^ self
|
|
|
620 |
].
|
|
|
621 |
(tagType == 288) ifTrue:[
|
|
|
622 |
"freeOffsets"
|
|
|
623 |
'freeOffsets ' print. value printNewline.
|
|
|
624 |
^ self
|
|
|
625 |
].
|
|
|
626 |
(tagType == 289) ifTrue:[
|
|
|
627 |
"freeByteCounts"
|
|
|
628 |
'freeByteCounts ' print. value printNewline.
|
|
|
629 |
^ self
|
|
|
630 |
].
|
|
|
631 |
(tagType == 290) ifTrue:[
|
|
|
632 |
"grayResponceUnit"
|
|
|
633 |
'grayResponceUnit' print. value printNewline.
|
|
|
634 |
^ self
|
|
|
635 |
].
|
|
|
636 |
(tagType == 291) ifTrue:[
|
|
|
637 |
"grayResponceCurve"
|
|
|
638 |
'grayResponceCurve' print. value printNewline.
|
|
|
639 |
^ self
|
|
|
640 |
].
|
|
|
641 |
(tagType == 292) ifTrue:[
|
|
|
642 |
"group3options"
|
|
|
643 |
group3options := value.
|
|
|
644 |
'group3options ' print. group3options printNewline.
|
|
|
645 |
^ self
|
|
|
646 |
].
|
|
|
647 |
(tagType == 293) ifTrue:[
|
|
|
648 |
"group4options"
|
|
|
649 |
"group4options := value."
|
|
|
650 |
'group4options ' print. value printNewline.
|
|
|
651 |
^ self
|
|
|
652 |
].
|
|
|
653 |
(tagType == 296) ifTrue:[
|
|
|
654 |
"resolutionunit"
|
|
|
655 |
(value == 1) ifTrue:[
|
|
|
656 |
'res-unit pixel' printNewline
|
|
|
657 |
] ifFalse:[
|
|
|
658 |
(value == 2) ifTrue:[
|
|
|
659 |
'res-unit inch' printNewline
|
|
|
660 |
] ifFalse:[
|
|
|
661 |
(value == 3) ifTrue:[
|
|
|
662 |
'res-unit mm' printNewline
|
|
|
663 |
] ifFalse:[
|
|
|
664 |
'res-unit invalid' printNewline
|
|
|
665 |
]
|
|
|
666 |
]
|
|
|
667 |
].
|
|
|
668 |
"resolutionUnit := value."
|
|
|
669 |
^ self
|
|
|
670 |
].
|
|
|
671 |
(tagType == 297) ifTrue:[
|
|
|
672 |
"pageNumber"
|
|
|
673 |
"pageNumber := value."
|
|
|
674 |
'pageNumber ' print. value printNewline.
|
|
|
675 |
^ self
|
|
|
676 |
].
|
|
|
677 |
(tagType == 300) ifTrue:[
|
|
|
678 |
"colorResponceUnit"
|
|
|
679 |
'colorResponceUnit' print. value printNewline.
|
|
|
680 |
^ self
|
|
|
681 |
].
|
|
|
682 |
(tagType == 301) ifTrue:[
|
|
|
683 |
"colorResponceCurve"
|
|
|
684 |
'colorResponceCurve' print. value printNewline.
|
|
|
685 |
^ self
|
|
|
686 |
].
|
|
|
687 |
(tagType == 306) ifTrue:[
|
|
|
688 |
"dateTime"
|
|
|
689 |
'dateTime ' print. value printNewline.
|
|
|
690 |
^ self
|
|
|
691 |
].
|
|
|
692 |
(tagType == 315) ifTrue:[
|
|
|
693 |
"artist"
|
|
|
694 |
'artist ' print. value printNewline.
|
|
|
695 |
^ self
|
|
|
696 |
].
|
|
|
697 |
(tagType == 317) ifTrue:[
|
|
|
698 |
"predictor"
|
|
|
699 |
predictor := value.
|
|
|
700 |
'predictor ' print. predictor printNewline.
|
|
|
701 |
^ self
|
|
|
702 |
].
|
|
|
703 |
(tagType == 320) ifTrue:[
|
|
|
704 |
"colorMap"
|
|
|
705 |
'colorMap (size=' print. valueArray size print. ')' printNewline.
|
|
|
706 |
n := valueArray size // 3.
|
|
|
707 |
colorMap := Array new:3.
|
|
|
708 |
colorMap at:1 put:(valueArray copyFrom:1 to:n).
|
|
|
709 |
colorMap at:2 put:(valueArray copyFrom:n+1 to:2*n).
|
|
|
710 |
colorMap at:3 put:(valueArray copyFrom:2*n+1 to:3*n).
|
|
|
711 |
1 to:3 do:[:c |
|
|
|
712 |
1 to:n do:[:e |
|
|
|
713 |
val := (colorMap at:c) at:e.
|
|
|
714 |
val := (val * 255.0 / 16rFFFF) rounded.
|
|
|
715 |
(colorMap at:c) at:e put:val
|
|
|
716 |
]
|
|
|
717 |
].
|
|
|
718 |
^ self
|
|
|
719 |
].
|
|
|
720 |
|
|
|
721 |
'tag:' print. tagType print. ' typ:' print. numberType print.
|
|
|
722 |
' len:' print. length print. ' offs:' print. offset print.
|
|
|
723 |
' val:' print. value print. ' valArr:' print. valueArray printNewline.
|
|
|
724 |
|
|
|
725 |
'unknown type ' print. tagType printNewline
|
|
|
726 |
!
|
|
|
727 |
|
|
|
728 |
writeBits
|
|
|
729 |
"write bits as one strip"
|
|
|
730 |
|
|
|
731 |
|offs bytesPerRow|
|
|
|
732 |
|
|
|
733 |
data size < 16rFFFF ifTrue:[
|
|
|
734 |
stripOffsets := Array with:(outStream position - 1).
|
|
|
735 |
stripByteCounts := Array with:(data size).
|
|
|
736 |
outStream nextPutBytes:data size from:data.
|
|
|
737 |
rowsPerStrip := height
|
|
|
738 |
] ifFalse:[
|
|
|
739 |
stripOffsets := Array new:height.
|
|
|
740 |
bytesPerRow := data size // height.
|
|
|
741 |
stripByteCounts := (Array new:height) atAllPut:bytesPerRow.
|
|
|
742 |
|
|
|
743 |
offs := 1.
|
|
|
744 |
1 to:height do:[:row |
|
|
|
745 |
stripOffsets at:row put:(outStream position - 1).
|
|
3
|
746 |
outStream nextPutBytes:bytesPerRow from:data startingAt:offs.
|
|
0
|
747 |
offs := offs + bytesPerRow
|
|
|
748 |
].
|
|
|
749 |
rowsPerStrip := 1
|
|
|
750 |
].
|
|
|
751 |
'stripOffsets: ' print. stripOffsets printNewline.
|
|
|
752 |
'stripByteCounts: ' print. stripByteCounts printNewline.
|
|
|
753 |
!
|
|
|
754 |
|
|
|
755 |
writeColorMap
|
|
|
756 |
colorMapPos := outStream position.
|
|
|
757 |
colorMap do:[:subMap |
|
|
|
758 |
subMap do:[:entry |
|
|
|
759 |
"my maps are 8 bit - tiff map is 16 bit"
|
|
3
|
760 |
entry isNil ifTrue:[
|
|
|
761 |
"unused map entry"
|
|
|
762 |
self writeShort:0
|
|
|
763 |
] ifFalse:[
|
|
|
764 |
self writeShort:(entry / 255 * 16rFFFF) rounded
|
|
|
765 |
]
|
|
0
|
766 |
]
|
|
|
767 |
]
|
|
|
768 |
!
|
|
|
769 |
|
|
|
770 |
writeStripOffsets
|
|
3
|
771 |
"
|
|
0
|
772 |
'stripOffsets: ' print. stripOffsets printNewline.
|
|
|
773 |
'store stripoffsets at: ' print. outStream position printNewline.
|
|
3
|
774 |
"
|
|
0
|
775 |
stripOffsetsPos := outStream position.
|
|
|
776 |
stripOffsets do:[:o |
|
|
|
777 |
self writeLong:o
|
|
|
778 |
]
|
|
|
779 |
!
|
|
|
780 |
|
|
|
781 |
writeStripByteCounts
|
|
3
|
782 |
"
|
|
0
|
783 |
'stripByteCounts: ' print. stripByteCounts printNewline.
|
|
|
784 |
'store stripbytecounts at: ' print. outStream position printNewline.
|
|
3
|
785 |
"
|
|
0
|
786 |
stripByteCountsPos := outStream position.
|
|
|
787 |
stripByteCounts do:[:c |
|
|
|
788 |
self writeShort:c
|
|
|
789 |
]
|
|
|
790 |
!
|
|
|
791 |
|
|
|
792 |
writeBitsPerSample
|
|
3
|
793 |
"
|
|
0
|
794 |
'bitsPerSample: ' print. bitsPerSample printNewline.
|
|
|
795 |
'store bitspersample at: ' print. outStream position printNewline.
|
|
3
|
796 |
"
|
|
0
|
797 |
bitsPerSamplePos := outStream position.
|
|
|
798 |
bitsPerSample do:[:n |
|
|
|
799 |
self writeShort:n
|
|
|
800 |
]
|
|
|
801 |
!
|
|
|
802 |
|
|
|
803 |
writeTag:tagType
|
|
|
804 |
self writeTiffTag:tagType.
|
|
|
805 |
!
|
|
|
806 |
|
|
|
807 |
writeTiffTag:tagType
|
|
|
808 |
|value valueArray numberType count address|
|
|
|
809 |
|
|
|
810 |
count := 1.
|
|
|
811 |
address := nil.
|
|
|
812 |
(tagType == 253) ifTrue:[
|
|
|
813 |
"tiff class"
|
|
|
814 |
].
|
|
|
815 |
(tagType == 254) ifTrue:[
|
|
|
816 |
].
|
|
|
817 |
(tagType == 255) ifTrue:[
|
|
|
818 |
"SubfileType"
|
|
|
819 |
value := subFileType.
|
|
|
820 |
numberType := #long.
|
|
|
821 |
].
|
|
|
822 |
(tagType == 256) ifTrue:[
|
|
|
823 |
"ImageWidth"
|
|
|
824 |
value := width.
|
|
|
825 |
numberType := #short.
|
|
|
826 |
].
|
|
|
827 |
(tagType == 257) ifTrue:[
|
|
|
828 |
"ImageHeight"
|
|
|
829 |
value := height.
|
|
|
830 |
numberType := #short.
|
|
|
831 |
].
|
|
|
832 |
(tagType == 258) ifTrue:[
|
|
|
833 |
"bitspersample"
|
|
|
834 |
address := bitsPerSamplePos - 1.
|
|
|
835 |
numberType := #short.
|
|
|
836 |
count := bitsPerSample size.
|
|
|
837 |
valueArray := bitsPerSample
|
|
|
838 |
].
|
|
|
839 |
(tagType == 259) ifTrue:[
|
|
|
840 |
"compression"
|
|
|
841 |
value := compression.
|
|
|
842 |
numberType := #short.
|
|
|
843 |
].
|
|
|
844 |
(tagType == 262) ifTrue:[
|
|
|
845 |
"photometric"
|
|
|
846 |
(photometric == #whiteIs0) ifTrue:[
|
|
|
847 |
value := 0
|
|
|
848 |
] ifFalse:[
|
|
|
849 |
(photometric == #blackIs0) ifTrue:[
|
|
|
850 |
value := 1
|
|
|
851 |
] ifFalse:[
|
|
|
852 |
(photometric == #rgb) ifTrue:[
|
|
|
853 |
value := 2
|
|
|
854 |
] ifFalse:[
|
|
|
855 |
(photometric == #palette) ifTrue:[
|
|
|
856 |
value := 3
|
|
|
857 |
] ifFalse:[
|
|
|
858 |
(photometric == #transparency) ifTrue:[
|
|
|
859 |
value := 4
|
|
|
860 |
] ifFalse:[
|
|
|
861 |
self error:'bad photometric'
|
|
|
862 |
]
|
|
|
863 |
]
|
|
|
864 |
]
|
|
|
865 |
]
|
|
|
866 |
].
|
|
|
867 |
numberType := #short.
|
|
|
868 |
].
|
|
|
869 |
(tagType == 263) ifTrue:[
|
|
|
870 |
].
|
|
|
871 |
(tagType == 264) ifTrue:[
|
|
|
872 |
].
|
|
|
873 |
(tagType == 265) ifTrue:[
|
|
|
874 |
].
|
|
|
875 |
(tagType == 266) ifTrue:[
|
|
|
876 |
"fillOrder"
|
|
|
877 |
(fillOrder == #msb) ifTrue:[
|
|
|
878 |
value := 1
|
|
|
879 |
] ifFalse:[
|
|
|
880 |
(fillOrder == #lsb) ifTrue:[
|
|
|
881 |
value := 2
|
|
|
882 |
] ifFalse:[
|
|
|
883 |
self error:'bad fillOrder'
|
|
|
884 |
]
|
|
|
885 |
].
|
|
|
886 |
numberType := #short.
|
|
|
887 |
].
|
|
|
888 |
(tagType == 269) ifTrue:[
|
|
|
889 |
].
|
|
|
890 |
(tagType == 270) ifTrue:[
|
|
|
891 |
].
|
|
|
892 |
(tagType == 271) ifTrue:[
|
|
|
893 |
].
|
|
|
894 |
(tagType == 272) ifTrue:[
|
|
|
895 |
].
|
|
|
896 |
(tagType == 273) ifTrue:[
|
|
|
897 |
"stripoffsets"
|
|
|
898 |
address := stripOffsetsPos - 1.
|
|
|
899 |
numberType := #long.
|
|
|
900 |
count := stripOffsets size.
|
|
|
901 |
valueArray := stripOffsets
|
|
|
902 |
].
|
|
|
903 |
(tagType == 274) ifTrue:[
|
|
|
904 |
].
|
|
|
905 |
(tagType == 277) ifTrue:[
|
|
|
906 |
"samplesPerPixel"
|
|
|
907 |
value := samplesPerPixel.
|
|
|
908 |
numberType := #short.
|
|
|
909 |
].
|
|
|
910 |
(tagType == 278) ifTrue:[
|
|
|
911 |
"rowsperstrip"
|
|
|
912 |
value := rowsPerStrip.
|
|
|
913 |
numberType := #short.
|
|
|
914 |
].
|
|
|
915 |
(tagType == 279) ifTrue:[
|
|
|
916 |
"stripbytecount"
|
|
|
917 |
address := stripByteCountsPos - 1.
|
|
|
918 |
numberType := #short.
|
|
|
919 |
count := stripByteCounts size.
|
|
|
920 |
valueArray := stripByteCounts
|
|
|
921 |
].
|
|
|
922 |
(tagType == 280) ifTrue:[
|
|
|
923 |
"min sample value"
|
|
|
924 |
].
|
|
|
925 |
(tagType == 281) ifTrue:[
|
|
|
926 |
"max sample value"
|
|
|
927 |
].
|
|
|
928 |
(tagType == 282) ifTrue:[
|
|
|
929 |
"x resolution"
|
|
|
930 |
].
|
|
|
931 |
(tagType == 283) ifTrue:[
|
|
|
932 |
"y resolution"
|
|
|
933 |
].
|
|
|
934 |
(tagType == 284) ifTrue:[
|
|
|
935 |
"planarconfig"
|
|
|
936 |
value := planarConfiguration.
|
|
|
937 |
numberType := #short.
|
|
|
938 |
].
|
|
|
939 |
(tagType == 285) ifTrue:[
|
|
|
940 |
"pageName"
|
|
|
941 |
].
|
|
|
942 |
(tagType == 286) ifTrue:[
|
|
|
943 |
"xPosition"
|
|
|
944 |
].
|
|
|
945 |
(tagType == 287) ifTrue:[
|
|
|
946 |
"yPosition"
|
|
|
947 |
].
|
|
|
948 |
(tagType == 288) ifTrue:[
|
|
|
949 |
"freeOffsets"
|
|
|
950 |
].
|
|
|
951 |
(tagType == 289) ifTrue:[
|
|
|
952 |
"freeByteCounts"
|
|
|
953 |
].
|
|
|
954 |
(tagType == 290) ifTrue:[
|
|
|
955 |
"grayResponceUnit"
|
|
|
956 |
].
|
|
|
957 |
(tagType == 291) ifTrue:[
|
|
|
958 |
"grayResponceCurve"
|
|
|
959 |
].
|
|
|
960 |
(tagType == 292) ifTrue:[
|
|
|
961 |
"group3options"
|
|
|
962 |
value := group3options.
|
|
|
963 |
numberType := #long.
|
|
|
964 |
].
|
|
|
965 |
(tagType == 293) ifTrue:[
|
|
|
966 |
"group4options"
|
|
|
967 |
].
|
|
|
968 |
(tagType == 296) ifTrue:[
|
|
|
969 |
"resolutionunit"
|
|
|
970 |
^ self
|
|
|
971 |
].
|
|
|
972 |
(tagType == 297) ifTrue:[
|
|
|
973 |
"pageNumber"
|
|
|
974 |
].
|
|
|
975 |
(tagType == 300) ifTrue:[
|
|
|
976 |
"colorResponceUnit"
|
|
|
977 |
].
|
|
|
978 |
(tagType == 301) ifTrue:[
|
|
|
979 |
"colorResponceCurve"
|
|
|
980 |
].
|
|
|
981 |
(tagType == 306) ifTrue:[
|
|
|
982 |
"dateTime"
|
|
|
983 |
].
|
|
|
984 |
(tagType == 315) ifTrue:[
|
|
|
985 |
"artist"
|
|
|
986 |
].
|
|
|
987 |
(tagType == 317) ifTrue:[
|
|
|
988 |
"predictor"
|
|
|
989 |
].
|
|
|
990 |
(tagType == 320) ifTrue:[
|
|
|
991 |
"colormap"
|
|
|
992 |
address := colorMapPos - 1.
|
|
|
993 |
numberType := #short.
|
|
|
994 |
count := (colorMap at:1) size * 3.
|
|
|
995 |
].
|
|
|
996 |
|
|
|
997 |
(value isNil and:[address isNil]) ifTrue:[
|
|
|
998 |
self error:'unhandled tag'.
|
|
|
999 |
^ self
|
|
|
1000 |
].
|
|
|
1001 |
|
|
|
1002 |
'tag:' print. tagType print. ' typ:' print. numberType print.
|
|
|
1003 |
' len:' print. count print.
|
|
|
1004 |
' val:' print. value printNewline.
|
|
|
1005 |
|
|
|
1006 |
self writeShort:tagType.
|
|
|
1007 |
numberType == #short ifTrue:[
|
|
|
1008 |
self writeShort:3.
|
|
|
1009 |
self writeLong:count.
|
|
|
1010 |
] ifFalse:[
|
|
|
1011 |
numberType == #long ifTrue:[
|
|
|
1012 |
self writeShort:4.
|
|
|
1013 |
self writeLong:count.
|
|
|
1014 |
] ifFalse:[
|
|
|
1015 |
numberType == #byte ifTrue:[
|
|
|
1016 |
self writeShort:1.
|
|
|
1017 |
self writeLong:count.
|
|
|
1018 |
] ifFalse:[
|
|
|
1019 |
self error:'bad numbertype'
|
|
|
1020 |
]
|
|
|
1021 |
]
|
|
|
1022 |
].
|
|
|
1023 |
address notNil ifTrue:[
|
|
|
1024 |
(numberType == #long and:[count == 1]) ifTrue:[
|
|
|
1025 |
self writeLong:(valueArray at:1).
|
|
|
1026 |
^ self
|
|
|
1027 |
].
|
|
|
1028 |
(numberType == #short and:[count <= 2]) ifTrue:[
|
|
|
1029 |
self writeShort:(valueArray at:1).
|
|
|
1030 |
count == 2 ifTrue:[
|
|
|
1031 |
self writeShort:(valueArray at:2).
|
|
|
1032 |
] ifFalse:[
|
|
|
1033 |
self writeShort:0
|
|
|
1034 |
].
|
|
|
1035 |
^ self
|
|
|
1036 |
].
|
|
|
1037 |
(numberType == #byte and:[count <= 4]) ifTrue:[
|
|
|
1038 |
outStream nextPut:(valueArray at:1).
|
|
|
1039 |
count > 1 ifTrue:[
|
|
|
1040 |
outStream nextPut:(valueArray at:2).
|
|
|
1041 |
count > 2 ifTrue:[
|
|
|
1042 |
outStream nextPut:(valueArray at:3).
|
|
|
1043 |
count > 3 ifTrue:[
|
|
|
1044 |
outStream nextPut:(valueArray at:4).
|
|
|
1045 |
] ifFalse:[
|
|
|
1046 |
outStream nextPut:0
|
|
|
1047 |
].
|
|
|
1048 |
] ifFalse:[
|
|
|
1049 |
outStream nextPut:0
|
|
|
1050 |
].
|
|
|
1051 |
] ifFalse:[
|
|
|
1052 |
outStream nextPut:0
|
|
|
1053 |
].
|
|
|
1054 |
^ self
|
|
|
1055 |
].
|
|
|
1056 |
self writeLong:address.
|
|
|
1057 |
^ self
|
|
|
1058 |
].
|
|
|
1059 |
numberType == #short ifTrue:[
|
|
|
1060 |
self writeShort:value.
|
|
|
1061 |
self writeShort:0
|
|
|
1062 |
] ifFalse:[
|
|
|
1063 |
numberType == #long ifTrue:[
|
|
|
1064 |
self writeLong:value
|
|
|
1065 |
] ifFalse:[
|
|
|
1066 |
numberType == #byte ifTrue:[
|
|
|
1067 |
outStream nextPut:value.
|
|
|
1068 |
outStream nextPut:0.
|
|
|
1069 |
outStream nextPut:0.
|
|
|
1070 |
outStream nextPut:0.
|
|
|
1071 |
] ifFalse:[
|
|
|
1072 |
self error:'bad numbertype'
|
|
|
1073 |
]
|
|
|
1074 |
]
|
|
|
1075 |
].
|
|
|
1076 |
!
|
|
|
1077 |
|
|
|
1078 |
readUncompressedTiffImageData
|
|
|
1079 |
|bytesPerRow bitsPerRow nPlanes
|
|
|
1080 |
stripNr "{ Class: SmallInteger }"
|
|
|
1081 |
offset "{ Class: SmallInteger }"
|
|
|
1082 |
row "{ Class: SmallInteger }"
|
|
11
|
1083 |
nBytes "{ Class: SmallInteger }"
|
|
|
1084 |
bitsPerPixel overAllBytes|
|
|
0
|
1085 |
|
|
|
1086 |
nPlanes := samplesPerPixel.
|
|
|
1087 |
|
|
|
1088 |
"only support 1-sample/pixel,
|
|
|
1089 |
with alpha - if separate planes,
|
|
|
1090 |
or rgb - if non separate planes and no alpha"
|
|
|
1091 |
|
|
|
1092 |
(nPlanes == 2) ifTrue:[
|
|
|
1093 |
(planarConfiguration ~~ 2) ifTrue:[
|
|
|
1094 |
self error:'with alpha, only separate planes supported'.
|
|
|
1095 |
^ nil
|
|
|
1096 |
].
|
|
|
1097 |
'ignoring alpha plane' printNewline.
|
|
|
1098 |
nPlanes := 1.
|
|
|
1099 |
bitsPerPixel := bitsPerSample at:1
|
|
|
1100 |
] ifFalse:[
|
|
|
1101 |
(nPlanes == 3) ifTrue:[
|
|
|
1102 |
(planarConfiguration ~~ 1) ifTrue:[
|
|
|
1103 |
self error:'only non separate planes supported'.
|
|
|
1104 |
^ nil
|
|
|
1105 |
].
|
|
|
1106 |
bitsPerSample ~= #(8 8 8) ifTrue:[
|
|
|
1107 |
self error:'only 8/8/8 rgb images supported'.
|
|
|
1108 |
^ nil
|
|
|
1109 |
].
|
|
|
1110 |
bitsPerPixel := 24
|
|
|
1111 |
] ifFalse:[
|
|
|
1112 |
(nPlanes ~~ 1) ifTrue:[
|
|
|
1113 |
self error:'format not supported'.
|
|
|
1114 |
^ nil
|
|
|
1115 |
].
|
|
|
1116 |
bitsPerPixel := bitsPerSample at:1
|
|
|
1117 |
]
|
|
|
1118 |
].
|
|
|
1119 |
|
|
|
1120 |
bitsPerRow := width * bitsPerPixel.
|
|
|
1121 |
bytesPerRow := bitsPerRow // 8.
|
|
|
1122 |
((bitsPerRow \\ 8) ~~ 0) ifTrue:[
|
|
|
1123 |
bytesPerRow := bytesPerRow + 1
|
|
|
1124 |
].
|
|
|
1125 |
|
|
11
|
1126 |
overAllBytes := bytesPerRow * height.
|
|
|
1127 |
data := ByteArray uninitializedNew:overAllBytes.
|
|
0
|
1128 |
|
|
|
1129 |
offset := 1.
|
|
|
1130 |
stripNr := 0.
|
|
|
1131 |
|
|
|
1132 |
row := 1.
|
|
|
1133 |
[row <= height] whileTrue:[
|
|
|
1134 |
stripNr := stripNr + 1.
|
|
11
|
1135 |
nBytes := stripByteCounts at:stripNr.
|
|
0
|
1136 |
inStream position:((stripOffsets at:stripNr) + 1).
|
|
|
1137 |
|
|
11
|
1138 |
inStream nextBytes:nBytes
|
|
|
1139 |
into:data
|
|
|
1140 |
startingAt:offset.
|
|
|
1141 |
offset := offset + nBytes.
|
|
0
|
1142 |
row := row + rowsPerStrip
|
|
|
1143 |
]
|
|
|
1144 |
!
|
|
|
1145 |
|
|
|
1146 |
readLZWTiffImageData
|
|
|
1147 |
"read LZW compressed tiff data; this method only
|
|
|
1148 |
handles 3x8 rgb and 1x2 or 2x2 greyscale images.
|
|
|
1149 |
For 2x2 greyscale images, the alpha plane is ignored.
|
|
|
1150 |
(maybe other formats work also - its simply not
|
|
|
1151 |
tested)"
|
|
|
1152 |
|
|
|
1153 |
|bytesPerRow compressedStrip nPlanes
|
|
|
1154 |
bytesPerStrip "{ Class: SmallInteger }"
|
|
|
1155 |
nBytes "{ Class: SmallInteger }"
|
|
|
1156 |
prevSize "{ Class: SmallInteger }"
|
|
|
1157 |
stripNr "{ Class: SmallInteger }"
|
|
|
1158 |
offset "{ Class: SmallInteger }"
|
|
|
1159 |
row "{ Class: SmallInteger }" |
|
|
|
1160 |
|
|
|
1161 |
nPlanes := samplesPerPixel.
|
|
|
1162 |
|
|
|
1163 |
(nPlanes == 3) ifTrue:[
|
|
|
1164 |
((bitsPerSample at:1) ~~ 8) ifTrue:[
|
|
|
1165 |
self error:'only 8 bit/sample supported'.
|
|
|
1166 |
^ nil
|
|
|
1167 |
].
|
|
|
1168 |
((bitsPerSample at:2) ~~ 8) ifTrue:[
|
|
|
1169 |
self error:'only 8 bit/sample supported'.
|
|
|
1170 |
^ nil
|
|
|
1171 |
].
|
|
|
1172 |
((bitsPerSample at:3) ~~ 8) ifTrue:[
|
|
|
1173 |
self error:'only 8 bit/sample supported'.
|
|
|
1174 |
^ nil
|
|
|
1175 |
].
|
|
|
1176 |
bytesPerRow := width * samplesPerPixel.
|
|
|
1177 |
] ifFalse:[
|
|
|
1178 |
(nPlanes == 2) ifTrue:[
|
|
|
1179 |
(planarConfiguration ~~ 2) ifTrue:[
|
|
|
1180 |
self error:'only separate planes supported'.
|
|
|
1181 |
^ nil
|
|
|
1182 |
].
|
|
|
1183 |
'ignoring alpha plane' printNewline.
|
|
|
1184 |
nPlanes := 1
|
|
|
1185 |
].
|
|
|
1186 |
(nPlanes == 1) ifFalse:[
|
|
|
1187 |
self error:'only 3-sample rgb / monochrome supported'.
|
|
|
1188 |
^ nil
|
|
|
1189 |
].
|
|
|
1190 |
bytesPerRow := (width * (bitsPerSample at:1) + 7) // 8.
|
|
|
1191 |
].
|
|
|
1192 |
|
|
|
1193 |
stripByteCounts isNil ifTrue:[
|
|
|
1194 |
self error:'currently require stripByteCounts'.
|
|
|
1195 |
^ nil
|
|
|
1196 |
].
|
|
|
1197 |
|
|
|
1198 |
data := ByteArray uninitializedNew:(bytesPerRow * height).
|
|
|
1199 |
|
|
|
1200 |
offset := 1.
|
|
|
1201 |
stripNr := 0.
|
|
|
1202 |
|
|
|
1203 |
row := 1.
|
|
|
1204 |
bytesPerStrip := bytesPerRow * rowsPerStrip.
|
|
|
1205 |
prevSize := 0.
|
|
|
1206 |
[row <= height] whileTrue:[
|
|
|
1207 |
stripNr := stripNr + 1.
|
|
|
1208 |
inStream position:((stripOffsets at:stripNr) + 1).
|
|
|
1209 |
nBytes := stripByteCounts at:stripNr.
|
|
|
1210 |
(nBytes > prevSize) ifTrue:[
|
|
|
1211 |
compressedStrip := ByteArray uninitializedNew:nBytes.
|
|
|
1212 |
prevSize := nBytes
|
|
|
1213 |
].
|
|
|
1214 |
inStream nextBytes:nBytes
|
|
|
1215 |
into:compressedStrip.
|
|
|
1216 |
self class decompressLZWFrom:compressedStrip
|
|
|
1217 |
count:nBytes
|
|
|
1218 |
into:data
|
|
|
1219 |
startingAt:offset.
|
|
|
1220 |
offset := offset + bytesPerStrip.
|
|
|
1221 |
row := row + rowsPerStrip
|
|
|
1222 |
].
|
|
|
1223 |
|
|
|
1224 |
(predictor == 2) ifTrue:[
|
|
3
|
1225 |
self class decodeDelta:3 in:data width:width height:height
|
|
0
|
1226 |
]
|
|
|
1227 |
!
|
|
|
1228 |
|
|
|
1229 |
readCCITTGroup3TiffImageData
|
|
|
1230 |
"not really tested - all I got is a single
|
|
|
1231 |
fax from NeXT step"
|
|
|
1232 |
|
|
|
1233 |
|bytesPerRow bitsPerRow compressedStrip nPlanes
|
|
|
1234 |
stripNr "{ Class: SmallInteger }"
|
|
|
1235 |
offset "{ Class: SmallInteger }"
|
|
|
1236 |
row "{ Class: SmallInteger }"
|
|
|
1237 |
bytesPerStrip "{ Class: SmallInteger }" |
|
|
|
1238 |
|
|
|
1239 |
nPlanes := samplesPerPixel.
|
|
|
1240 |
(nPlanes == 2) ifTrue:[
|
|
|
1241 |
'ignoring alpha plane' printNewline.
|
|
|
1242 |
nPlanes := 1
|
|
|
1243 |
].
|
|
|
1244 |
|
|
|
1245 |
(nPlanes ~~ 1) ifTrue:[
|
|
|
1246 |
self error:'only monochrome/greyscale supported'.
|
|
|
1247 |
^ nil
|
|
|
1248 |
].
|
|
|
1249 |
|
|
|
1250 |
stripByteCounts isNil ifTrue:[
|
|
|
1251 |
self error:'currently require stripByteCounts'.
|
|
|
1252 |
^ nil
|
|
|
1253 |
].
|
|
|
1254 |
(rowsPerStrip ~~ 1) isNil ifTrue:[
|
|
|
1255 |
self error:'currently require rowsPerStrip to be 1'.
|
|
|
1256 |
^ nil
|
|
|
1257 |
].
|
|
|
1258 |
|
|
|
1259 |
|
|
|
1260 |
bitsPerRow := width * (bitsPerSample at:1).
|
|
|
1261 |
bytesPerRow := bitsPerRow // 8.
|
|
|
1262 |
((bitsPerRow \\ 8) ~~ 0) ifTrue:[
|
|
|
1263 |
bytesPerRow := bytesPerRow + 1
|
|
|
1264 |
].
|
|
|
1265 |
|
|
3
|
1266 |
data := ByteArray new:(bytesPerRow * height).
|
|
0
|
1267 |
compressedStrip := ByteArray uninitializedNew:bytesPerRow.
|
|
|
1268 |
|
|
|
1269 |
offset := 1.
|
|
|
1270 |
stripNr := 0.
|
|
|
1271 |
|
|
|
1272 |
row := 1.
|
|
|
1273 |
bytesPerStrip := bytesPerRow * rowsPerStrip.
|
|
|
1274 |
[row <= height] whileTrue:[
|
|
|
1275 |
stripNr := stripNr + 1.
|
|
|
1276 |
inStream position:((stripOffsets at:stripNr) + 1).
|
|
3
|
1277 |
inStream nextBytes:(stripByteCounts at:stripNr) into:compressedStrip.
|
|
0
|
1278 |
self class decompressCCITT3From:compressedStrip
|
|
|
1279 |
into:data
|
|
|
1280 |
startingAt:offset
|
|
|
1281 |
count:width.
|
|
|
1282 |
offset := offset + bytesPerStrip.
|
|
|
1283 |
row := row + rowsPerStrip
|
|
|
1284 |
]
|
|
|
1285 |
!
|
|
|
1286 |
|
|
|
1287 |
readJPEGTiffImageData
|
|
|
1288 |
'jpeg compression not implemented' printNewline
|
|
|
1289 |
!
|
|
|
1290 |
|
|
|
1291 |
readPackbitsTiffImageData
|
|
|
1292 |
"had no samples yet - however, packbits decompression
|
|
|
1293 |
is rather trivial to add ..."
|
|
|
1294 |
|
|
|
1295 |
'packbits compression not implemented' printNewline
|
|
|
1296 |
! !
|