--- a/PCXReader.st Wed Apr 16 22:27:04 1997 +0200
+++ b/PCXReader.st Wed Apr 16 22:57:02 1997 +0200
@@ -45,10 +45,10 @@
Image writing is not supported.
[See also:]
- Image Form Icon
- BlitImageReader FaceReader GIFReader JPEGReader PBMReader
- ST80FormReader SunRasterReader TargaReader TIFFReader WindowsIconReader
- XBMReader XPMReader XWDReader
+ Image Form Icon
+ BlitImageReader FaceReader GIFReader JPEGReader PBMReader
+ ST80FormReader SunRasterReader TargaReader TIFFReader WindowsIconReader
+ XBMReader XPMReader XWDReader
"
! !
@@ -91,12 +91,12 @@
"check magic number"
((aHeader at:1) ~~ 16r0A) ifTrue:[
- ^ false
+ ^ false
].
"check version"
(#(0 2 3 5) includes:(aHeader at:2)) ifFalse:[
- ^ false
+ ^ false
].
^ true
@@ -117,16 +117,16 @@
fileSize := aStream size.
fileSize < 128 ifTrue:[
- self error:'PCXREADER: short file'.
- ^ nil
+ self error:'PCXREADER: short file'.
+ ^ nil
].
header := ByteArray uninitializedNew:128.
aStream nextBytes:128 into:header.
(self class isValidPCXHeader:header) ifFalse:[
- self error:'PCXREADER: wrong header'.
- ^ nil
+ self error:'PCXREADER: wrong header'.
+ ^ nil
].
img := self fromStreamWithHeader:header.
@@ -155,13 +155,34 @@
nBuffer "{Class: SmallInteger }"
mapSize|
+ "/ typedef struct { /*header for PCX bitmap files*/
+ "/ unsigned char signature; /*PCX file identifier*/
+ "/ unsigned char version; /*version compatibility level*/
+ "/ unsigned char encoding; /*encoding method*/
+ "/ unsigned char bitsperpix; /*bits per pixel, or depth*/
+ "/ unsigned short Xleft; /*X position of left edge*/
+ "/ unsigned short Ytop; /*Y position of top edge*/
+ "/ unsigned short Xright; /*X position of right edge*/
+ "/ unsigned short Ybottom; /*Y position of bottom edge*/
+ "/ unsigned short Xscreensize; /*X screen res of source image*/
+ "/ unsigned short Yscreensize; /*Y screen res of source image*/
+ "/ unsigned char PCXpalette[16][3]; /*PCX color map*/
+ "/ unsigned char reserved1; /*should be 0, 1 if std res fax*/
+ "/ unsigned char planes; /*bit planes in image*/
+ "/ unsigned short linesize; /*byte delta between scanlines */
+ "/ unsigned short paletteinfo; /*0 == undef
+ "/ 1 == color
+ "/ 2 == grayscale*/
+ "/ unsigned char reserved2[58]; /*fill to struct size of 128*/
+ "/ } PCX_HEADER;
+
version := header at:2.
"/ 'version=' print. version printNL.
compression := header at:3.
"/ 'compression=' print. compression printNL.
(#(0 1) includes:compression) ifFalse:[
- self error:'PCXREADER: unknown compression'.
- ^ nil
+ self error:'PCXREADER: unknown compression'.
+ ^ nil
].
inDepth := header at:4.
@@ -178,10 +199,10 @@
So its not (yet) implemented
"
((inDepth ~~ 8) or:[nPlanes ~~ 1]) ifTrue:[
- 'PCXReader: depth: ' errorPrint. inDepth errorPrint.
- ' planes:' errorPrint. nPlanes errorPrintNL.
- 'PCXReader: can only handle 1-plane 256 color images' errorPrintNL.
- ^ nil
+ 'PCXReader: depth: ' errorPrint. inDepth errorPrint.
+ ' planes:' errorPrint. nPlanes errorPrintNL.
+ 'PCXReader: can only handle 1-plane 256 color images' errorPrintNL.
+ ^ nil
].
xmin := header wordAt:5 MSB:false.
@@ -195,134 +216,134 @@
"/ 'height=' print. width printNL.
(version == 2) ifTrue:[
- "read the 16-entry colormap"
+ "read the 16-entry colormap"
- rawMap := ByteArray uninitializedNew:(16*3).
- rawMap replaceFrom:1 to:(16*3) with:header startingAt:17.
- rMap := Array new:16.
- gMap := Array new:16.
- bMap := Array new:16.
- srcIndex := 1.
- 1 to:16 do:[:i |
- rMap at:i put:(rawMap at:srcIndex).
- srcIndex := srcIndex + 1.
- gMap at:i put:(rawMap at:srcIndex).
- srcIndex := srcIndex + 1.
- bMap at:i put:(rawMap at:srcIndex).
- srcIndex := srcIndex + 1.
- ].
+ rawMap := ByteArray uninitializedNew:(16*3).
+ rawMap replaceFrom:1 to:(16*3) with:header startingAt:17.
+ rMap := Array new:16.
+ gMap := Array new:16.
+ bMap := Array new:16.
+ srcIndex := 1.
+ 1 to:16 do:[:i |
+ rMap at:i put:(rawMap at:srcIndex).
+ srcIndex := srcIndex + 1.
+ gMap at:i put:(rawMap at:srcIndex).
+ srcIndex := srcIndex + 1.
+ bMap at:i put:(rawMap at:srcIndex).
+ srcIndex := srcIndex + 1.
+ ].
].
compression == 1 ifTrue:[
- data := dataBytes := ByteArray uninitializedNew:(height * srcBytesPerRow).
+ data := dataBytes := ByteArray uninitializedNew:(height * srcBytesPerRow).
- buffer := ByteArray uninitializedNew:4096.
- bufferIndex := 1.
- bendIndex := 1.
+ buffer := ByteArray uninitializedNew:4096.
+ bufferIndex := 1.
+ bendIndex := 1.
- rowIndex := 1.
- h := height.
- 1 to:h do:[:row |
- dstIndex := rowIndex.
- endIndex := dstIndex + srcBytesPerRow.
- [dstIndex < endIndex] whileTrue:[
- bufferIndex == bendIndex ifTrue:[
- nBuffer := inStream nextBytes:4096 into:buffer.
- bufferIndex := 1.
- bendIndex := nBuffer + 1.
- ].
- byte := buffer at:bufferIndex.
- bufferIndex := bufferIndex + 1.
- ((byte bitAnd:2r11000000) ~~ 2r11000000) ifTrue:[
- dataBytes at:dstIndex put:byte.
- dstIndex := dstIndex + 1.
- ] ifFalse:[
- nByte := byte bitAnd:2r00111111.
- bufferIndex == bendIndex ifTrue:[
- nBuffer := inStream nextBytes:4096 into:buffer.
- bufferIndex := 1.
- bendIndex := nBuffer + 1.
- ].
- value := buffer at:bufferIndex.
- bufferIndex := bufferIndex + 1.
- idx2 := ((dstIndex + nByte) min:endIndex) - 1.
- dataBytes from:dstIndex to:idx2 put:value.
- dstIndex := dstIndex + nByte.
- ].
- ].
- rowIndex := endIndex.
- ].
+ rowIndex := 1.
+ h := height.
+ 1 to:h do:[:row |
+ dstIndex := rowIndex.
+ endIndex := dstIndex + srcBytesPerRow.
+ [dstIndex < endIndex] whileTrue:[
+ bufferIndex == bendIndex ifTrue:[
+ nBuffer := inStream nextBytes:4096 into:buffer.
+ bufferIndex := 1.
+ bendIndex := nBuffer + 1.
+ ].
+ byte := buffer at:bufferIndex.
+ bufferIndex := bufferIndex + 1.
+ ((byte bitAnd:2r11000000) ~~ 2r11000000) ifTrue:[
+ dataBytes at:dstIndex put:byte.
+ dstIndex := dstIndex + 1.
+ ] ifFalse:[
+ nByte := byte bitAnd:2r00111111.
+ bufferIndex == bendIndex ifTrue:[
+ nBuffer := inStream nextBytes:4096 into:buffer.
+ bufferIndex := 1.
+ bendIndex := nBuffer + 1.
+ ].
+ value := buffer at:bufferIndex.
+ bufferIndex := bufferIndex + 1.
+ idx2 := ((dstIndex + nByte) min:endIndex) - 1.
+ dataBytes from:dstIndex to:idx2 put:value.
+ dstIndex := dstIndex + nByte.
+ ].
+ ].
+ rowIndex := endIndex.
+ ].
- "/ have to compress - above code reads srcBytesPerRow
- "/ (to keep in sync with RLE); but we want width bytesPerRow
- "/ Can compress in the data-area; leftover pixels are simply ignored
- "/ by other image processing code
- "/
- srcBytesPerRow ~~ width ifTrue:[
- dstIndex := width + 1.
- srcIndex := srcBytesPerRow + 1.
- 2 to:h do:[:row |
- dataBytes replaceFrom:dstIndex to:dstIndex+width-1 with:dataBytes startingAt:srcIndex.
- dstIndex := dstIndex + width.
- srcIndex := srcIndex + srcBytesPerRow
- ]
- ].
- nBuffer := endIndex - bufferIndex.
+ "/ have to compress - above code reads srcBytesPerRow
+ "/ (to keep in sync with RLE); but we want width bytesPerRow
+ "/ Can compress in the data-area; leftover pixels are simply ignored
+ "/ by other image processing code
+ "/
+ srcBytesPerRow ~~ width ifTrue:[
+ dstIndex := width + 1.
+ srcIndex := srcBytesPerRow + 1.
+ 2 to:h do:[:row |
+ dataBytes replaceFrom:dstIndex to:dstIndex+width-1 with:dataBytes startingAt:srcIndex.
+ dstIndex := dstIndex + width.
+ srcIndex := srcIndex + srcBytesPerRow
+ ]
+ ].
+ nBuffer := endIndex - bufferIndex.
] ifFalse:[
- "
- uncompressed; actually untested ...
- "
- data := dataBytes := ByteArray uninitializedNew:(height * width).
- srcBytesPerRow ~~ width ifTrue:[
- dstIndex := 1.
- 1 to:h do:[:row |
- inStream nextBytes:width into:data startingAt:dstIndex.
- dstIndex := dstIndex + width.
- inStream skip:(srcBytesPerRow - width).
- ]
- ] ifFalse:[
- inStream nextBytes:(height * width) into:data.
- ].
- nBuffer := 0.
+ "
+ uncompressed; actually untested ...
+ "
+ data := dataBytes := ByteArray uninitializedNew:(height * width).
+ srcBytesPerRow ~~ width ifTrue:[
+ dstIndex := 1.
+ 1 to:h do:[:row |
+ inStream nextBytes:width into:data startingAt:dstIndex.
+ dstIndex := dstIndex + width.
+ inStream skip:(srcBytesPerRow - width).
+ ]
+ ] ifFalse:[
+ inStream nextBytes:(height * width) into:data.
+ ].
+ nBuffer := 0.
].
(version == 5) ifTrue:[
- "read the 256-entry colormap"
+ "read the 256-entry colormap"
- nBuffer ~~ 0 ifTrue:[
- byte := buffer at:bufferIndex.
- bufferIndex := bufferIndex + 1. nBuffer := nBuffer - 1.
- ] ifFalse:[
- byte := inStream next
- ].
+ nBuffer ~~ 0 ifTrue:[
+ byte := buffer at:bufferIndex.
+ bufferIndex := bufferIndex + 1. nBuffer := nBuffer - 1.
+ ] ifFalse:[
+ byte := inStream next
+ ].
- byte == 16r0C ifFalse:[
- 'PCXREADER: no valid 256-entry palette (got' errorPrint.
- byte errorPrint. '; expected ' errorPrint. 16rC0 errorPrint. ')' errorPrintNL.
- ].
- rawMap := ByteArray uninitializedNew:(256*3).
- nBuffer ~~ 0 ifTrue:[
- mapSize := buffer size - bufferIndex + 1.
- mapSize := mapSize min:(256*3).
- rawMap replaceFrom:1 to:mapSize with:buffer startingAt:bufferIndex.
- nBuffer < (256*3) ifTrue:[
- inStream nextBytes:((256*3)-nBuffer) into:rawMap startingAt:nBuffer+1
- ]
- ] ifFalse:[
- inStream nextBytes:(256*3) into:rawMap.
- ].
- rMap := Array new:256.
- gMap := Array new:256.
- bMap := Array new:256.
- srcIndex := 1.
- 1 to:256 do:[:i |
- rMap at:i put:(rawMap at:srcIndex).
- srcIndex := srcIndex + 1.
- gMap at:i put:(rawMap at:srcIndex).
- srcIndex := srcIndex + 1.
- bMap at:i put:(rawMap at:srcIndex).
- srcIndex := srcIndex + 1.
- ].
+ byte == 16r0C ifFalse:[
+ 'PCXREADER: no valid 256-entry palette (got' errorPrint.
+ byte errorPrint. '; expected ' errorPrint. 16rC0 errorPrint. ')' errorPrintNL.
+ ].
+ rawMap := ByteArray uninitializedNew:(256*3).
+ nBuffer ~~ 0 ifTrue:[
+ mapSize := buffer size - bufferIndex + 1.
+ mapSize := mapSize min:(256*3).
+ rawMap replaceFrom:1 to:mapSize with:buffer startingAt:bufferIndex.
+ nBuffer < (256*3) ifTrue:[
+ inStream nextBytes:((256*3)-nBuffer) into:rawMap startingAt:nBuffer+1
+ ]
+ ] ifFalse:[
+ inStream nextBytes:(256*3) into:rawMap.
+ ].
+ rMap := Array new:256.
+ gMap := Array new:256.
+ bMap := Array new:256.
+ srcIndex := 1.
+ 1 to:256 do:[:i |
+ rMap at:i put:(rawMap at:srcIndex).
+ srcIndex := srcIndex + 1.
+ gMap at:i put:(rawMap at:srcIndex).
+ srcIndex := srcIndex + 1.
+ bMap at:i put:(rawMap at:srcIndex).
+ srcIndex := srcIndex + 1.
+ ].
].
photometric := #palette.
@@ -342,6 +363,6 @@
!PCXReader class methodsFor:'documentation'!
version
- ^ '$Header: /cvs/stx/stx/libview2/PCXReader.st,v 1.19 1997-04-16 20:27:04 cg Exp $'
+ ^ '$Header: /cvs/stx/stx/libview2/PCXReader.st,v 1.20 1997-04-16 20:57:02 cg Exp $'
! !
PCXReader initialize!