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prepare to read mask/alpha channel
authorClaus Gittinger <cg@exept.de>
Fri, 21 Jun 1996 11:54:17 +0200
changeset 893 24dc4b26a486
parent 892 602b15686c95
child 894 1041c0edbd35
prepare to read mask/alpha channel
ImageRdr.st file | annotate | diff | comparison | revisions
ImageReader.st file | annotate | diff | comparison | revisions 
--- a/ImageRdr.st	Wed Jun 19 09:55:27 1996 +0200
+++ b/ImageRdr.st	Fri Jun 21 11:54:17 1996 +0200
@@ -12,7 +12,7 @@
 
 Object subclass:#ImageReader
 	instanceVariableNames:'width height data byteOrder inStream outStream photometric
-		samplesPerPixel bitsPerSample colorMap'
+		samplesPerPixel bitsPerSample colorMap mask'
 	classVariableNames:'ReverseBits'
 	poolDictionaries:''
 	category:'Graphics-Images-Support'
@@ -967,7 +967,7 @@
 %}
 ! !
 
-!ImageReader class methodsFor:'documentation'!
+!ImageReader  class methodsFor:'documentation'!
 
 copyright
 "
@@ -1020,7 +1020,7 @@
 "
 ! !
 
-!ImageReader class methodsFor:'cleanup'!
+!ImageReader  class methodsFor:'cleanup'!
 
 lowSpaceCleanup
     "cleanup things we do not need"
@@ -1028,7 +1028,7 @@
     ReverseBits := nil
 ! !
 
-!ImageReader class methodsFor:'constants'!
+!ImageReader  class methodsFor:'constants'!
 
 reverseBits
     "return a table filled with bit reverse information.
@@ -1057,7 +1057,7 @@
     ^ ReverseBits
 ! !
 
-!ImageReader class methodsFor:'decompression support'!
+!ImageReader  class methodsFor:'decompression support'!
 
 decodeDelta:step in:data width:width height:height
     "perform NeXT special predictor delta decoding inplace in data.
@@ -1239,7 +1239,7 @@
     "Modified: 22.4.1996 / 19:14:54 / cg"
 ! !
 
-!ImageReader class methodsFor:'i/o support'!
+!ImageReader  class methodsFor:'i/o support'!
 
 streamReadingFile:aFilename
     "return a stream to read aFilename.
@@ -1269,7 +1269,7 @@
     "Modified: 7.3.1996 / 19:18:04 / cg"
 ! !
 
-!ImageReader class methodsFor:'image reading'!
+!ImageReader  class methodsFor:'image reading'!
 
 fromFile:aFileName
     "read an image (in my format) from aFileName. 
@@ -1309,7 +1309,7 @@
     "Modified: 22.4.1996 / 19:11:58 / cg"
 ! !
 
-!ImageReader class methodsFor:'image writing'!
+!ImageReader  class methodsFor:'image writing'!
 
 save:anImage onFile:aFileName
     "save the image in my format on aFileName"
@@ -1317,7 +1317,7 @@
     ^ (self basicNew) save:anImage onFile:aFileName
 ! !
 
-!ImageReader class methodsFor:'testing'!
+!ImageReader  class methodsFor:'testing'!
 
 canRepresent:anImage
     "return true, if anImage can be represented in my file format.
@@ -1388,10 +1388,20 @@
         samplesPerPixel:samplesPerPixel
         bitsPerSample:bitsPerSample
         colorMap:colorMap
-        bits:data.
+        bits:data
+        mask:mask.
     ^ image
 
-    "Modified: 23.4.1996 / 11:07:04 / cg"
+    "Modified: 20.6.1996 / 17:09:04 / cg"
+!
+
+mask
+    "return the image mask (or nil)"
+
+    ^ mask
+
+    "Modified: 22.4.1996 / 19:15:31 / cg"
+    "Created: 20.6.1996 / 17:08:29 / cg"
 !
 
 photometric
@@ -1482,8 +1492,8 @@
     ^ self subclassResponsibility
 ! !
 
-!ImageReader class methodsFor:'documentation'!
+!ImageReader  class methodsFor:'documentation'!
 
 version
-    ^ '$Header: /cvs/stx/stx/libview/Attic/ImageRdr.st,v 1.30 1996-05-10 16:44:54 cg Exp $'
+    ^ '$Header: /cvs/stx/stx/libview/Attic/ImageRdr.st,v 1.31 1996-06-21 09:54:17 cg Exp $'
 ! !
--- a/ImageReader.st	Wed Jun 19 09:55:27 1996 +0200
+++ b/ImageReader.st	Fri Jun 21 11:54:17 1996 +0200
@@ -12,7 +12,7 @@
 
 Object subclass:#ImageReader
 	instanceVariableNames:'width height data byteOrder inStream outStream photometric
-		samplesPerPixel bitsPerSample colorMap'
+		samplesPerPixel bitsPerSample colorMap mask'
 	classVariableNames:'ReverseBits'
 	poolDictionaries:''
 	category:'Graphics-Images-Support'
@@ -967,7 +967,7 @@
 %}
 ! !
 
-!ImageReader class methodsFor:'documentation'!
+!ImageReader  class methodsFor:'documentation'!
 
 copyright
 "
@@ -1020,7 +1020,7 @@
 "
 ! !
 
-!ImageReader class methodsFor:'cleanup'!
+!ImageReader  class methodsFor:'cleanup'!
 
 lowSpaceCleanup
     "cleanup things we do not need"
@@ -1028,7 +1028,7 @@
     ReverseBits := nil
 ! !
 
-!ImageReader class methodsFor:'constants'!
+!ImageReader  class methodsFor:'constants'!
 
 reverseBits
     "return a table filled with bit reverse information.
@@ -1057,7 +1057,7 @@
     ^ ReverseBits
 ! !
 
-!ImageReader class methodsFor:'decompression support'!
+!ImageReader  class methodsFor:'decompression support'!
 
 decodeDelta:step in:data width:width height:height
     "perform NeXT special predictor delta decoding inplace in data.
@@ -1239,7 +1239,7 @@
     "Modified: 22.4.1996 / 19:14:54 / cg"
 ! !
 
-!ImageReader class methodsFor:'i/o support'!
+!ImageReader  class methodsFor:'i/o support'!
 
 streamReadingFile:aFilename
     "return a stream to read aFilename.
@@ -1269,7 +1269,7 @@
     "Modified: 7.3.1996 / 19:18:04 / cg"
 ! !
 
-!ImageReader class methodsFor:'image reading'!
+!ImageReader  class methodsFor:'image reading'!
 
 fromFile:aFileName
     "read an image (in my format) from aFileName. 
@@ -1309,7 +1309,7 @@
     "Modified: 22.4.1996 / 19:11:58 / cg"
 ! !
 
-!ImageReader class methodsFor:'image writing'!
+!ImageReader  class methodsFor:'image writing'!
 
 save:anImage onFile:aFileName
     "save the image in my format on aFileName"
@@ -1317,7 +1317,7 @@
     ^ (self basicNew) save:anImage onFile:aFileName
 ! !
 
-!ImageReader class methodsFor:'testing'!
+!ImageReader  class methodsFor:'testing'!
 
 canRepresent:anImage
     "return true, if anImage can be represented in my file format.
@@ -1388,10 +1388,20 @@
         samplesPerPixel:samplesPerPixel
         bitsPerSample:bitsPerSample
         colorMap:colorMap
-        bits:data.
+        bits:data
+        mask:mask.
     ^ image
 
-    "Modified: 23.4.1996 / 11:07:04 / cg"
+    "Modified: 20.6.1996 / 17:09:04 / cg"
+!
+
+mask
+    "return the image mask (or nil)"
+
+    ^ mask
+
+    "Modified: 22.4.1996 / 19:15:31 / cg"
+    "Created: 20.6.1996 / 17:08:29 / cg"
 !
 
 photometric
@@ -1482,8 +1492,8 @@
     ^ self subclassResponsibility
 ! !
 
-!ImageReader class methodsFor:'documentation'!
+!ImageReader  class methodsFor:'documentation'!
 
 version
-    ^ '$Header: /cvs/stx/stx/libview/ImageReader.st,v 1.30 1996-05-10 16:44:54 cg Exp $'
+    ^ '$Header: /cvs/stx/stx/libview/ImageReader.st,v 1.31 1996-06-21 09:54:17 cg Exp $'
 ! !
hg/stx-libview