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"
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COPYRIGHT (c) 1993 by Claus Gittinger
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28
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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:#WindowsIconReader
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28
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instanceVariableNames:''
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classVariableNames:''
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poolDictionaries:''
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32
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category:'Graphics-Images support'
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0
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!
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21
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!WindowsIconReader class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 1993 by Claus Gittinger
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28
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All Rights Reserved
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0
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26 |
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21
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This software is furnished under a license and may be used
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28 |
only in accordance with the terms of that license and with the
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29 |
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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!
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0
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21
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version
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"
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102
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$Header: /cvs/stx/stx/libview2/WindowsIconReader.st,v 1.16 1995-09-17 18:01:10 claus Exp $
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21
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"
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!
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documentation
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"
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32
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this class provides methods for loading Windows and OS2 icon files.
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Image writing is not supported.
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21
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"
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! !
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0
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48 |
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28
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!WindowsIconReader class methodsFor:'initialization'!
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initialize
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Image fileFormats at:'.bmp' put:self.
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Image fileFormats at:'.ico' put:self.
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! !
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102
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!WindowsIconReader class methodsFor:'testing'!
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isValidImageFile:aFileName
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"return true, if aFileName contains a valid windows bitmap-file image"
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|inStream header ok|
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inStream := self streamReadingFile:aFileName.
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inStream isNil ifTrue:[^ false].
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inStream binary.
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inStream size < 16 ifTrue:[
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^ false
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].
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header := ByteArray uninitializedNew:4.
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inStream nextBytes:4 into:header.
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ok := false.
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(header startsWith:#(66 77)) ifTrue:[ "BM"
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ok := true.
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"/ 'WINREADER: Win3.x or OS/2 vsn 2 BM format' infoPrintNL.
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].
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(header startsWith:#(66 65)) ifTrue:[ "BA"
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ok := true.
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"/ 'WINREADER: OS/2 vsn 2 BA format' infoPrintNL.
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].
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(header startsWith:#(73 67)) ifTrue:[ "IC"
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ok := true.
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"/ 'WINREADER: OS/2 IC format' infoPrintNL.
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].
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(header startsWith:#(80 84)) ifTrue:[ "PT"
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ok := true.
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"/ 'WINREADER: OS/2 PT format' infoPrintNL.
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].
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(header startsWith:#(0 0 1 0)) ifTrue:[
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ok := true.
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"/ 'WINREADER: Win3.x ICO format' infoPrintNL.
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].
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ok ifFalse:[^ false].
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^ true
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"
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WindowsIconReader isValidImageFile:'/phys/clam2/LocalLibrary/Images/OS2_icons/dos.ico'
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"
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"Created: 17.9.1995 / 17:14:20 / claus"
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! !
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53
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!WindowsIconReader methodsFor:'reading from file'!
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0
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21
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fromOS2File: aFilename
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|reader stream|
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stream := self streamReadingFile:aFilename.
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stream isNil ifTrue:[^ nil].
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83
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reader := (self new) fromOS2Stream:stream.
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41
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stream close.
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reader notNil ifTrue:[^ reader image].
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^ nil
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21
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!
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0
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117 |
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fromWindowsBMPFile: aFilename
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|reader stream|
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stream := self class streamReadingFile:aFilename.
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stream isNil ifTrue:[^ nil].
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83
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reader := (self new) fromWindowsBMPStream:stream.
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stream close.
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reader notNil ifTrue:[^ reader image].
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^ nil
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21
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!
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fromWindowsICOFile: aFilename
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|reader stream|
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stream := self class streamReadingFile:aFilename.
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stream isNil ifTrue:[^ nil].
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83
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reader := (self new) fromWindowsICOStream:stream.
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stream close.
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reader notNil ifTrue:[^ reader image].
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^ nil
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21
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"
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Image fromFile:'/phys/clam2//LocalLibrary/Images/WIN_icons/ibm.ico'.
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"
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!
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143 |
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41
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fromWindowsICOStream:aStream
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21
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145 |
| header inDepth
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rawMap rMap gMap bMap srcIndex dstIndex
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data4 mask tmp bytesPerRow nColor|
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0
|
148 |
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41
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inStream := aStream.
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aStream binary.
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0
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151 |
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"read the header"
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153 |
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21
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header := ByteArray uninitializedNew:(6 + 16 + 40).
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41
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aStream nextBytes:(6 + 16 + 40) into:header.
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21
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width := header at:(6+1).
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height := header at:(7+1).
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nColor := header at:(8+1).
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"10, 11, 12, 13, 14 ? (reserve)"
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160 |
"15, 16, 17, 18 pixel array size"
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161 |
"19, 20, 21, 22 offset "
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162 |
"23, ... , 62 ?"
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163 |
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0
|
164 |
inDepth := header at:16r25.
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165 |
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"read the colormap"
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167 |
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21
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rawMap := ByteArray uninitializedNew:(16*4).
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41
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aStream nextBytes:(16*4) into:rawMap.
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0
|
170 |
rMap := Array new:16.
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gMap := Array new:16.
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172 |
bMap := Array new:16.
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srcIndex := 1.
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1 to:16 do:[:i |
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28
|
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bMap at:i put:(rawMap at:srcIndex).
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srcIndex := srcIndex + 1.
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gMap at:i put:(rawMap at:srcIndex).
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178 |
srcIndex := srcIndex + 1.
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179 |
rMap at:i put:(rawMap at:srcIndex).
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|
180 |
srcIndex := srcIndex + 1.
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181 |
srcIndex := srcIndex + 1.
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0
|
182 |
].
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183 |
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184 |
"read the data bits"
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185 |
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3
|
186 |
bytesPerRow := width * inDepth + 7 // 8.
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187 |
data4 := ByteArray uninitializedNew:(height * bytesPerRow).
|
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41
|
188 |
aStream nextBytes:(height * bytesPerRow) into:data4.
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0
|
189 |
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190 |
"read mask"
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191 |
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192 |
"
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|
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mask := ByteArray new:(width * height / 8).
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41
|
194 |
aStream nextBytes:(width * height / 8) into:mask.
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0
|
195 |
"
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|
196 |
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|
197 |
"stupid: last row first"
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198 |
|
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3
|
199 |
tmp := ByteArray uninitializedNew:(height * bytesPerRow).
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0
|
200 |
srcIndex := 1.
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|
201 |
dstIndex := (height - 1) * bytesPerRow + 1.
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202 |
1 to:height do:[:row |
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28
|
203 |
tmp replaceFrom:dstIndex to:(dstIndex + bytesPerRow - 1)
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204 |
with:data4 startingAt:srcIndex.
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|
205 |
srcIndex := srcIndex + bytesPerRow.
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|
206 |
dstIndex := dstIndex - bytesPerRow.
|
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0
|
207 |
].
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|
208 |
data4 := tmp.
|
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|
209 |
|
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|
210 |
"expand into bytes"
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|
211 |
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|
212 |
data := ByteArray new:(width * height).
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|
213 |
data4 expandPixels:inDepth width:width height:height
|
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28
|
214 |
into:data mapping:nil.
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0
|
215 |
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|
216 |
photometric := #palette.
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|
217 |
samplesPerPixel := 1.
|
|
|
218 |
bitsPerSample := #(8).
|
|
36
|
219 |
colorMap := Colormap redVector:rMap greenVector:gMap blueVector:bMap.
|
|
0
|
220 |
|
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|
221 |
"
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21
|
222 |
WindowsIconReader new fromWindowsICOFile:'/phys/clam2//LocalLibrary/Images/WIN_icons/ibm.ico'.
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0
|
223 |
"
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|
224 |
!
|
|
|
225 |
|
|
41
|
226 |
fromWindowsBMPStream:aStream
|
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21
|
227 |
| fileSize header inDepth inPlanes compression
|
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|
228 |
imgSize resH resV numColor numImportantColor
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|
229 |
dataStart
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0
|
230 |
rawMap rMap gMap bMap srcIndex dstIndex
|
|
21
|
231 |
data4 mask tmp bytesPerRow fourBytesPerColorInfo|
|
|
|
232 |
|
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41
|
233 |
inStream := aStream.
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|
234 |
aStream binary.
|
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|
235 |
|
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|
236 |
fileSize := aStream size.
|
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21
|
237 |
"read the header"
|
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|
238 |
|
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|
239 |
header := ByteArray uninitializedNew:16r54.
|
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41
|
240 |
aStream nextBytes:18 into:header.
|
|
21
|
241 |
|
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|
242 |
((header at:(16r0E + 1)) == 40) ifTrue:[ "header-size"
|
|
28
|
243 |
"
|
|
|
244 |
its an Windows3.x BMP file
|
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|
245 |
or OS/2 vsn 2 BMP file
|
|
|
246 |
"
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|
247 |
'BMP: Win3.x or OS/2 vsn 2 format' errorPrintNL.
|
|
21
|
248 |
|
|
41
|
249 |
aStream nextBytes:(40-4) into:header startingAt:19.
|
|
21
|
250 |
|
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83
|
251 |
width := header wordAt:(16r12 + 1) MSB:false. "(header at:19) + ((header at:20) * 256). "
|
|
|
252 |
height := header wordAt:(16r16 + 1) MSB:false. "(header at:23) + ((header at:24) * 256). "
|
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|
253 |
inPlanes := header wordAt:(16r1A + 1) MSB:false.
|
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|
254 |
inDepth := header wordAt:(16r1C + 1) MSB:false.
|
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|
255 |
compression := header wordAt:(16r1E + 1) MSB:false.
|
|
|
256 |
imgSize := header doubleWordAt:(16r22 + 1) MSB:false.
|
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|
257 |
resH := header doubleWordAt:(16r26 + 1) MSB:false.
|
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|
258 |
resV := header doubleWordAt:(16r2A + 1) MSB:false.
|
|
|
259 |
numColor := header doubleWordAt:(16r2E + 1) MSB:false.
|
|
|
260 |
numImportantColor := header doubleWordAt:(16r32 + 1) MSB:false.
|
|
21
|
261 |
|
|
28
|
262 |
numColor == 0 ifTrue:[
|
|
|
263 |
"
|
|
|
264 |
some bmp-writers seem to leave this as zero (which is wrong)
|
|
|
265 |
"
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|
266 |
numColor := 1 bitShift:inDepth.
|
|
|
267 |
'BMP: missing nColor in header - assume ' errorPrint. numColor errorPrintNL
|
|
|
268 |
].
|
|
|
269 |
rawMap := ByteArray uninitializedNew:(numColor * 4).
|
|
41
|
270 |
aStream nextBytes:(numColor * 4) into:rawMap.
|
|
28
|
271 |
fourBytesPerColorInfo := true.
|
|
83
|
272 |
dataStart := header wordAt:(16r0A + 1) MSB:false
|
|
21
|
273 |
] ifFalse:[
|
|
28
|
274 |
((header at:(16r0E + 1)) == 12) ifTrue:[ "core-info header size"
|
|
|
275 |
"
|
|
|
276 |
its an OS/2 (vsn1.2) BMP file
|
|
|
277 |
"
|
|
|
278 |
'BMP: OS/2 vsn 1.2 format' errorPrintNL.
|
|
41
|
279 |
aStream nextBytes:(12-4) into:header startingAt:19.
|
|
21
|
280 |
|
|
83
|
281 |
width := header wordAt:(16r12 + 1) MSB:false. "(header at:19) + ((header at:20) * 256). "
|
|
|
282 |
height := header wordAt:(16r14 + 1) MSB:false. "(header at:21) + ((header at:22) * 256). "
|
|
|
283 |
inPlanes := header wordAt:(16r16 + 1) MSB:false.
|
|
|
284 |
inDepth := header wordAt:(16r18 + 1) MSB:false.
|
|
28
|
285 |
numColor := 1 bitShift:inDepth.
|
|
|
286 |
rawMap := ByteArray uninitializedNew:(numColor * 3).
|
|
41
|
287 |
aStream nextBytes:(numColor * 3) into:rawMap.
|
|
28
|
288 |
fourBytesPerColorInfo := false.
|
|
|
289 |
compression := 0.
|
|
83
|
290 |
dataStart := header wordAt:(16r0A + 1) MSB:false
|
|
28
|
291 |
] ifFalse:[
|
|
|
292 |
'BMP: unknown format' errorPrintNL.
|
|
|
293 |
^ nil
|
|
|
294 |
].
|
|
21
|
295 |
].
|
|
|
296 |
|
|
|
297 |
"read the colormap"
|
|
|
298 |
|
|
|
299 |
rMap := Array new:numColor.
|
|
|
300 |
gMap := Array new:numColor.
|
|
|
301 |
bMap := Array new:numColor.
|
|
|
302 |
srcIndex := 1.
|
|
|
303 |
1 to:numColor do:[:i |
|
|
28
|
304 |
bMap at:i put:(rawMap at:srcIndex).
|
|
|
305 |
srcIndex := srcIndex + 1.
|
|
|
306 |
gMap at:i put:(rawMap at:srcIndex).
|
|
|
307 |
srcIndex := srcIndex + 1.
|
|
|
308 |
rMap at:i put:(rawMap at:srcIndex).
|
|
|
309 |
srcIndex := srcIndex + 1.
|
|
|
310 |
fourBytesPerColorInfo ifTrue:[
|
|
|
311 |
srcIndex := srcIndex + 1.
|
|
|
312 |
]
|
|
21
|
313 |
].
|
|
|
314 |
|
|
102
|
315 |
"/ "
|
|
|
316 |
"/ currently only normal (non-rle) bitmaps
|
|
|
317 |
"/ supported
|
|
|
318 |
"/ "
|
|
|
319 |
"/ compression ~~ 0 ifTrue:[
|
|
|
320 |
"/ 'BMP compression type ' errorPrint. compression errorPrint.
|
|
|
321 |
"/ 'not supported' errorPrintNL.
|
|
|
322 |
"/ ^ nil
|
|
|
323 |
"/ ].
|
|
|
324 |
"/ inPlanes ~~ 1 ifTrue:[
|
|
|
325 |
"/ 'BMP only 1 plane images supported' errorPrintNL.
|
|
|
326 |
"/ ^ nil
|
|
|
327 |
"/ ].
|
|
|
328 |
"/
|
|
|
329 |
"/ "read the data bits"
|
|
|
330 |
"/
|
|
|
331 |
"/ bytesPerRow := width * inDepth + 7 // 8.
|
|
|
332 |
"/ data4 := ByteArray uninitializedNew:(height * bytesPerRow).
|
|
|
333 |
"/
|
|
|
334 |
"/ aStream position:(dataStart + 1).
|
|
|
335 |
"/ aStream nextBytes:(height * bytesPerRow) into:data4.
|
|
|
336 |
"/
|
|
|
337 |
"/ "read mask"
|
|
|
338 |
"/
|
|
|
339 |
"/"
|
|
|
340 |
"/ mask := ByteArray new:(width * height / 8).
|
|
|
341 |
"/ aStream nextBytes:(width * height / 8) into:mask.
|
|
|
342 |
"/"
|
|
|
343 |
"/
|
|
|
344 |
"/ "stupid: last row first"
|
|
|
345 |
"/
|
|
|
346 |
"/ tmp := ByteArray uninitializedNew:(height * bytesPerRow).
|
|
|
347 |
"/ srcIndex := 1.
|
|
|
348 |
"/ dstIndex := (height - 1) * bytesPerRow + 1.
|
|
|
349 |
"/ 1 to:height do:[:row |
|
|
|
350 |
"/ tmp replaceFrom:dstIndex to:(dstIndex + bytesPerRow - 1)
|
|
|
351 |
"/ with:data4 startingAt:srcIndex.
|
|
|
352 |
"/ srcIndex := srcIndex + bytesPerRow.
|
|
|
353 |
"/ dstIndex := dstIndex - bytesPerRow.
|
|
|
354 |
"/ ].
|
|
|
355 |
"/ data4 := tmp.
|
|
|
356 |
|
|
21
|
357 |
compression ~~ 0 ifTrue:[
|
|
102
|
358 |
"/ some compression
|
|
|
359 |
compression == 1 ifTrue:[
|
|
|
360 |
"/ RLE8 - must be depth-8
|
|
|
361 |
inDepth == 8 ifFalse:[
|
|
|
362 |
'BMP: RLE8 compression only allowed with depth8 images' errorPrintNL.
|
|
|
363 |
^ nil
|
|
|
364 |
].
|
|
|
365 |
].
|
|
|
366 |
compression == 2 ifTrue:[
|
|
|
367 |
"/ RLE4 - must be depth-4
|
|
|
368 |
inDepth == 4 ifFalse:[
|
|
|
369 |
'BMP: RLE4 compression only allowed with depth4 images' errorPrintNL.
|
|
|
370 |
^ nil
|
|
|
371 |
].
|
|
|
372 |
].
|
|
21
|
373 |
].
|
|
102
|
374 |
|
|
21
|
375 |
inPlanes ~~ 1 ifTrue:[
|
|
102
|
376 |
'BMP: only 1 plane images supported' errorPrintNL.
|
|
28
|
377 |
^ nil
|
|
21
|
378 |
].
|
|
|
379 |
|
|
|
380 |
bytesPerRow := width * inDepth + 7 // 8.
|
|
102
|
381 |
"/ bmp data is always 32bit aligned; if required,
|
|
|
382 |
inBytesPerRow := ((bytesPerRow + 3) // 4) * 4.
|
|
41
|
383 |
aStream position:(dataStart + 1).
|
|
21
|
384 |
|
|
102
|
385 |
data := ByteArray uninitializedNew:(height * width "bytesPerRow").
|
|
|
386 |
inDepth == 8 ifTrue:[
|
|
|
387 |
(self class loadBMP8Width:width height:height compression:compression from:aStream into:data) ifFalse:[
|
|
|
388 |
'BMP: read/decompression failed' errorPrintNL.
|
|
|
389 |
^ nil
|
|
|
390 |
]
|
|
|
391 |
] ifFalse:[
|
|
|
392 |
inDepth == 4 ifTrue:[
|
|
|
393 |
(self class loadBMP4to8Width:width height:height compression:compression from:aStream into:data) ifFalse:[
|
|
|
394 |
'BMP: read/decompression failed' errorPrintNL.
|
|
|
395 |
^ nil
|
|
|
396 |
]
|
|
|
397 |
] ifFalse:[
|
|
|
398 |
inDepth == 1 ifTrue:[
|
|
|
399 |
(self class loadBMP1to8Width:width height:height from:aStream into:data) ifFalse:[
|
|
|
400 |
'BMP: read failed' errorPrintNL.
|
|
|
401 |
^ nil
|
|
|
402 |
]
|
|
|
403 |
] ifFalse:[
|
|
|
404 |
'BMP: unsupported depth:' errorPrint. inDepth errorPrintNL.
|
|
|
405 |
^ nil
|
|
|
406 |
]
|
|
|
407 |
]
|
|
21
|
408 |
].
|
|
|
409 |
"expand into bytes"
|
|
|
410 |
|
|
|
411 |
data := ByteArray new:(width * height).
|
|
|
412 |
data4 expandPixels:inDepth width:width height:height
|
|
28
|
413 |
into:data mapping:nil.
|
|
21
|
414 |
|
|
|
415 |
photometric := #palette.
|
|
|
416 |
samplesPerPixel := 1.
|
|
|
417 |
bitsPerSample := #(8).
|
|
36
|
418 |
colorMap := Colormap redVector:rMap greenVector:gMap blueVector:bMap.
|
|
21
|
419 |
!
|
|
|
420 |
|
|
41
|
421 |
fromStream:aStream
|
|
21
|
422 |
| fileSize header |
|
|
0
|
423 |
|
|
41
|
424 |
inStream := aStream.
|
|
0
|
425 |
|
|
41
|
426 |
aStream binary.
|
|
|
427 |
fileSize := aStream size.
|
|
0
|
428 |
|
|
21
|
429 |
fileSize < 16 ifTrue:[
|
|
41
|
430 |
'WINREADER: short file' errorPrintNL.
|
|
28
|
431 |
^ nil
|
|
21
|
432 |
].
|
|
|
433 |
|
|
|
434 |
header := ByteArray uninitializedNew:4.
|
|
41
|
435 |
aStream nextBytes:4 into:header.
|
|
21
|
436 |
|
|
|
437 |
(header startsWith:#(66 77)) ifTrue:[ "BM"
|
|
41
|
438 |
aStream position:1.
|
|
28
|
439 |
'WINREADER: Win3.x or OS/2 vsn 2 BM format' errorPrintNL.
|
|
41
|
440 |
^ self fromWindowsBMPStream:aStream
|
|
21
|
441 |
].
|
|
|
442 |
(header startsWith:#(66 65)) ifTrue:[ "BA"
|
|
41
|
443 |
aStream position:1.
|
|
28
|
444 |
'WINREADER: OS/2 vsn 2 BA format' errorPrintNL.
|
|
41
|
445 |
^ self fromOS2Stream:aStream
|
|
21
|
446 |
].
|
|
|
447 |
(header startsWith:#(73 67)) ifTrue:[ "IC"
|
|
41
|
448 |
aStream position:1.
|
|
28
|
449 |
'WINREADER: OS/2 IC format' errorPrintNL.
|
|
41
|
450 |
^ self fromOS2Stream:aStream
|
|
21
|
451 |
].
|
|
|
452 |
(header startsWith:#(80 84)) ifTrue:[ "PT"
|
|
41
|
453 |
aStream position:1.
|
|
28
|
454 |
'WINREADER: OS/2 PT format' errorPrintNL.
|
|
41
|
455 |
^ self fromOS2Stream:aStream
|
|
21
|
456 |
].
|
|
|
457 |
(header startsWith:#(0 0 1 0)) ifTrue:[
|
|
41
|
458 |
aStream position:1.
|
|
28
|
459 |
'WINREADER: Win3.x ICO format' errorPrintNL.
|
|
41
|
460 |
^ self fromWindowsICOStream:aStream
|
|
21
|
461 |
].
|
|
41
|
462 |
'WINREADER: format not supported' errorPrintNL.
|
|
21
|
463 |
^ nil
|
|
|
464 |
|
|
|
465 |
"
|
|
|
466 |
Image fromFile:'/phys/clam//LocalLibrary/Images/OS2_icons/dos.ico'
|
|
|
467 |
"
|
|
|
468 |
!
|
|
|
469 |
|
|
41
|
470 |
fromOS2Stream:aStream
|
|
21
|
471 |
| header inDepth
|
|
|
472 |
rawMap rMap gMap bMap srcIndex dstIndex
|
|
|
473 |
data4 mask tmp bytesPerRow nColors nByte|
|
|
|
474 |
|
|
41
|
475 |
inStream := aStream.
|
|
|
476 |
aStream binary.
|
|
21
|
477 |
|
|
0
|
478 |
"read the header"
|
|
|
479 |
|
|
3
|
480 |
header := ByteArray uninitializedNew:8r110.
|
|
41
|
481 |
aStream nextBytes:16 into:header.
|
|
21
|
482 |
|
|
0
|
483 |
(header startsWith:#(73 67)) ifTrue:[
|
|
28
|
484 |
"IC format"
|
|
41
|
485 |
aStream nextBytes:10 into:header startingAt:17.
|
|
28
|
486 |
width := header at:7.
|
|
|
487 |
height := header at:9.
|
|
|
488 |
inDepth := 2 "header at:11". "where is it"
|
|
0
|
489 |
] ifFalse:[
|
|
41
|
490 |
aStream nextBytes:(8r110-16) into:header startingAt:17.
|
|
28
|
491 |
width := header at:8r101.
|
|
|
492 |
height := header at:8r103.
|
|
|
493 |
inDepth := header at:8r107.
|
|
0
|
494 |
].
|
|
|
495 |
|
|
|
496 |
"read the colormap"
|
|
|
497 |
|
|
|
498 |
nColors := 1 bitShift:inDepth.
|
|
|
499 |
|
|
3
|
500 |
rawMap := ByteArray uninitializedNew:(nColors*3).
|
|
41
|
501 |
aStream nextBytes:(nColors*3) into:rawMap.
|
|
0
|
502 |
rMap := Array new:nColors.
|
|
|
503 |
gMap := Array new:nColors.
|
|
|
504 |
bMap := Array new:nColors.
|
|
|
505 |
srcIndex := 1.
|
|
|
506 |
1 to:nColors do:[:i |
|
|
28
|
507 |
bMap at:i put:(rawMap at:srcIndex).
|
|
|
508 |
srcIndex := srcIndex + 1.
|
|
|
509 |
gMap at:i put:(rawMap at:srcIndex).
|
|
|
510 |
srcIndex := srcIndex + 1.
|
|
|
511 |
rMap at:i put:(rawMap at:srcIndex).
|
|
|
512 |
srcIndex := srcIndex + 1.
|
|
0
|
513 |
].
|
|
|
514 |
|
|
|
515 |
"read mask"
|
|
|
516 |
|
|
3
|
517 |
nByte := width * height + 7 // 8.
|
|
|
518 |
mask := ByteArray uninitializedNew:nByte.
|
|
41
|
519 |
aStream nextBytes:nByte into:mask.
|
|
0
|
520 |
|
|
|
521 |
"what is this"
|
|
|
522 |
|
|
41
|
523 |
aStream nextBytes:nByte into:mask.
|
|
0
|
524 |
|
|
|
525 |
"read the data bits"
|
|
|
526 |
|
|
3
|
527 |
bytesPerRow := width * inDepth + 7 // 8.
|
|
|
528 |
data4 := ByteArray uninitializedNew:(height * bytesPerRow).
|
|
41
|
529 |
aStream nextBytes:(height * bytesPerRow) into:data4.
|
|
0
|
530 |
|
|
|
531 |
"stupid: last row first"
|
|
|
532 |
|
|
|
533 |
tmp := ByteArray new:(height * bytesPerRow).
|
|
|
534 |
srcIndex := 1.
|
|
|
535 |
dstIndex := (height - 1) * bytesPerRow + 1.
|
|
|
536 |
1 to:height do:[:row |
|
|
28
|
537 |
tmp replaceFrom:dstIndex to:(dstIndex + bytesPerRow - 1)
|
|
|
538 |
with:data4 startingAt:srcIndex.
|
|
|
539 |
srcIndex := srcIndex + bytesPerRow.
|
|
|
540 |
dstIndex := dstIndex - bytesPerRow.
|
|
0
|
541 |
].
|
|
|
542 |
data4 := tmp.
|
|
|
543 |
|
|
|
544 |
"expand into bytes"
|
|
|
545 |
|
|
|
546 |
data := ByteArray new:(width * height).
|
|
|
547 |
data4 expandPixels:inDepth width:width height:height
|
|
28
|
548 |
into:data mapping:nil.
|
|
0
|
549 |
|
|
|
550 |
photometric := #palette.
|
|
|
551 |
samplesPerPixel := 1.
|
|
|
552 |
bitsPerSample := #(8).
|
|
36
|
553 |
colorMap := Colormap redVector:rMap greenVector:gMap blueVector:bMap.
|
|
0
|
554 |
|
|
|
555 |
"
|
|
|
556 |
|i f|
|
|
|
557 |
i := Image fromFile:'/LocalLibrary/Images/OS2/dos3.ico'.
|
|
|
558 |
f := i asFormOn:Display.
|
|
18
|
559 |
v displayOpaqueForm:(f magnifyBy:2@2) x:5 y:5
|
|
0
|
560 |
"
|
|
|
561 |
! !
|