Build files: removed a bunch of make rules for long-dead unsupported systems
...in order to unify and simplify the build. If a need to support this
ancient systems arose, these hacks may ni longer be needed (due to new
versions of tools) or the hacks would have to be written again (better)
or retrieved from SCM (worse). Time will show.
"
COPYRIGHT (c) 2016 by Claus Gittinger
All Rights Reserved
This software is furnished under a license and may be used
only in accordance with the terms of that license and with the
inclusion of the above copyright notice. This software may not
be provided or otherwise made available to, or used by, any
other person. No title to or ownership of the software is
hereby transferred.
"
"{ Package: 'stx:libview' }"
"{ NameSpace: Smalltalk }"
FixedPalette subclass:#FixedPaletteWithAlpha
instanceVariableNames:'alphaShift alphaMask'
classVariableNames:''
poolDictionaries:''
category:'Graphics-Images-Support'
!
!FixedPaletteWithAlpha class methodsFor:'documentation'!
copyright
"
COPYRIGHT (c) 2016 by Claus Gittinger
All Rights Reserved
This software is furnished under a license and may be used
only in accordance with the terms of that license and with the
inclusion of the above copyright notice. This software may not
be provided or otherwise made available to, or used by, any
other person. No title to or ownership of the software is
hereby transferred.
"
! !
!FixedPaletteWithAlpha methodsFor:'accessing'!
alphaShift:alphaShiftArg alphaMask:alphaMaskArg
alphaShift := alphaShiftArg.
alphaMask := alphaMaskArg.
! !
!FixedPaletteWithAlpha methodsFor:'printing & storing'!
size
"return the number of (simulated) colors in this colormap"
^ ((alphaMask bitShift:alphaShift)
+ (redMask bitShift:redShift)
+ (greenMask bitShift:greenShift)
+ (blueMask bitShift:blueShift)) + 1
!
storeInstVarsOn:aStream
super storeInstVarsOn:aStream.
aStream nextPutAll:' alphaShift:'. alphaShift storeOn:aStream.
aStream nextPutAll:' alphaMask:'. alphaMask storeOn:aStream.
! !
!FixedPaletteWithAlpha methodsFor:'queries'!
alphaByteAt:index
"return the (simulated) alphaByte at index.
Notice that index is 1.."
|a aa|
alphaMask == 0 ifTrue:[^ 0]. "/ no alpha component
a := ((index-1 bitShift:alphaShift negated) bitAnd:alphaMask).
aa := (a * 255.0 / (alphaMask)) rounded.
^ aa
"
(FixedPalette redShift:16 redMask:16rFF greenShift:8 greenMask:16rFF blueShift:0 blueMask:16rFF) blueByteAt:16rFFFFFF+1
(FixedPalette redShift:10 redMask:16r1F greenShift:5 greenMask:16r1F blueShift:0 blueMask:16r1F) blueByteAt:16r7FFF+1
(FixedPalette redShift:11 redMask:16r1F greenShift:5 greenMask:16r3F blueShift:0 blueMask:16r1F) blueByteAt:16rFFFF+1
(FixedPalette redShift:11 redMask:16r1F greenShift:5 greenMask:16r3F blueShift:0 blueMask:16r1F) blueByteAt:0+1
(FixedPalette redShift:11 redMask:16r1F greenShift:5 greenMask:16r3F blueShift:0 blueMask:16r1F) blueByteAt:16r7FFF+1
"
!
bitsAlpha
^ alphaMask highBit
! !
!FixedPaletteWithAlpha class methodsFor:'documentation'!
version
^ '$Header$'
!
version_CVS
^ '$Header$'
! !