BlitImageReader.st
changeset 112 9b59ed94db13
child 113 465cc202f0fe
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/BlitImageReader.st	Thu Nov 09 17:10:26 1995 +0100
@@ -0,0 +1,129 @@
+'From Smalltalk/X, Version:2.10.8 on 9-nov-1995 at 17:08:48'                    !
+
+ImageReader subclass:#BlitImageReader
+	 instanceVariableNames:''
+	 classVariableNames:''
+	 poolDictionaries:''
+	 category:'Graphics-Images support'
+!
+
+!BlitImageReader class methodsFor:'documentation'!
+
+version
+"
+$Header: /cvs/stx/stx/libview2/BlitImageReader.st,v 1.1 1995-11-09 16:10:26 cg Exp $
+"
+
+    "Created: 9.11.1995 / 17:08:06 / cg"
+!
+
+documentation
+"
+    A q&d hack to read 48x48x1 Blit images (faces)
+"
+
+    "Created: 9.11.1995 / 17:08:06 / cg"
+    "Modified: 9.11.1995 / 17:08:26 / cg"
+!
+
+examples
+"
+    Image fromFile:'.../.../48x48x1'
+"
+
+    "Created: 9.11.1995 / 17:08:06 / cg"
+    "Modified: 9.11.1995 / 17:08:42 / cg"
+!
+
+history
+
+    "Created: 9.11.1995 / 17:08:06 / cg"
+    "Modified: 9.11.1995 / 17:08:06 / cg"
+! !
+
+!BlitImageReader class methodsFor:'initialization'!
+
+initialize
+    Image fileFormats at:'48x48x1'  put:self.
+
+    "
+     BlitImageReader initialize
+    "
+
+    "Created: 9.11.1995 / 17:05:04 / cg"
+    "Modified: 9.11.1995 / 17:06:28 / cg"
+! !
+
+!BlitImageReader class methodsFor:'testing'!
+
+isValidImageFile:aFileName
+    "return true, if aFileName contains a GIF image"
+
+    ^ aFileName = '48x48x1'
+
+    "Created: 9.11.1995 / 17:04:29 / cg"
+! !
+
+!BlitImageReader methodsFor:'reading'!
+
+fromStream:aStream
+    |line 
+     dstIndex "{ Class: SmallInteger }"
+     bytesPerRow
+     s words nm|
+
+    "/
+    "/ extract its size from the name
+    "/ kludge
+    "/
+    aStream pathName notNil ifTrue:[
+        nm := aStream pathName asFilename baseName.
+        ('[0-9][0-9]x[0-9][0-9]x1' match:nm) ifTrue:[
+            width := Integer readFromString:(nm copyFrom:1 to:2).
+            height := Integer readFromString:(nm copyFrom:4 to:5).
+        ].
+    ].
+    width isNil ifTrue:[
+        ^ nil
+    ].
+
+    bytesPerRow := width // 8.
+    ((width \\ 8) ~~ 0) ifTrue:[
+        bytesPerRow := bytesPerRow + 1
+    ].
+    data := ByteArray new:(bytesPerRow * height).
+    dstIndex := 1.
+
+    [aStream atEnd] whileFalse:[
+        line := aStream nextLine.
+        line notNil ifTrue:[
+            words := (line asCollectionOfSubstringsSeparatedBy:$,) asOrderedCollection.
+            words last isEmpty ifTrue:[
+                words removeLast
+            ].
+            words do:[:w |
+                |s bits|
+
+                s := w readStream.
+                s skip:2.
+                bits := Integer readFrom:s radix:16 onError:0. 
+                data at:dstIndex put:(bits bitShift:-8).
+                data at:dstIndex+1 put:(bits bitAnd:16rFF).
+                dstIndex := dstIndex + 2
+            ]
+        ]
+    ].
+
+
+    photometric := #whiteIs0.
+    samplesPerPixel := 1.
+    bitsPerSample := #(1)
+
+    "
+     BlitImageReader fromFile:'/tmp/faces/facedir/facedir/misc./acsnet/48x48x1'
+    "
+
+    "Created: 9.11.1995 / 17:03:04 / cg"
+! !
+
+BlitImageReader initialize!