XFT: Forbid XFT rendering on bitmaps (depth-1 pixmaps)
In theory it could work if XFT would just turn gray into
either black or white. But XFT doesn't do it and simply draw
nothing without failing in any way.
To prevent this silent failures, forbid drawing XFT onto bitmaps
(depth-1 pixmaps). After all, the while point of XFT is to use
anti-aliased fonts.
"{ Encoding: utf8 }"
"
COPYRIGHT (c) 2009 by eXept Software AG
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 }"
Object subclass:#AbstractBackground
instanceVariableNames:''
classVariableNames:''
poolDictionaries:''
category:'Graphics-Support'
!
!AbstractBackground class methodsFor:'documentation'!
copyright
"
COPYRIGHT (c) 2009 by eXept Software AG
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.
"
!
documentation
"
This will replace the viewBackground color.
Instances of me (and subclasses) can be set as a widget's
viewBackground, and will get
fillRectangleX:x y:y width:w height:h in:aView
messages whenever the widget wants to redraw (parts of) its background.
See the example in GradientBackground.
[author:]
Claus Gittinger
[see also:]
GradientBackground
"
!
examples
"
|v|
v := View new.
v viewBackground:(SolidBackground new color:Color red).
v open.
"
! !
!AbstractBackground methodsFor:'drawing'!
fillRectangleX:x y:y width:w height:h in:aView
self subclassResponsibility
"Created: / 23-01-2011 / 01:59:29 / cg"
! !
!AbstractBackground methodsFor:'ignored conversion'!
asFormOn:aDevice
self subclassResponsibility
"Created: / 23-01-2011 / 01:45:35 / cg"
"Modified: / 03-02-2011 / 19:55:49 / cg"
!
onDevice:aDevice
self subclassResponsibility
"Created: / 23-01-2011 / 01:46:11 / cg"
"Modified: / 03-02-2011 / 19:55:40 / cg"
! !
!AbstractBackground methodsFor:'testing'!
isViewBackground
^ true
!
needsFullRedrawOnChangeOfHeight
^ false
!
needsFullRedrawOnChangeOfWidth
^ false
! !
!AbstractBackground class methodsFor:'documentation'!
version
^ '$Header$'
!
version_CVS
^ '$Header$'
! !