[squeak-dev] The Trunk: Graphics-jmv.69.mcz

Juan Vuletich uploaded a new version of Graphics to project The Trunk:
http://source.squeak.org/trunk/Graphics-jmv.69.mcz

==================== Summary ====================

Name: Graphics-jmv.69
Author: jmv
Time: 23 August 2009, 12:00:04 pm
UUID: e5b02b44-70c4-43b5-a58e-bf69cf32b827
Ancestors: Graphics-jmv.68

Fix a small bug for newer VMs and AAStrikeFonts.
Do the install of Bitmap DejaVu again.

=============== Diff against Graphics-jmv.68 ===============

Item was added:
+ ----- Method: StrikeFont class>>initialize (in category 'class initialization') -----
+ initialize
+ StrikeFont installDejaVu!

Item was changed:
  ----- Method: BitBlt>>displayString:from:to:at:strikeFont:kern: (in category 'copying') -----
  displayString: aString from: startIndex to: stopIndex at: aPoint strikeFont: font kern: kernDelta
  "If required, do a second pass with new rule and colorMap.
  This happens when #installStrikeFont:foregroundColor:backgroundColor: sets rule 37 (rgbMul).
  the desired effect is to do two bitblt calls. The first one is with rule 37 and special colormap.
  The second one is rule 34, with a colormap for applying the requested foreground color.
  This two together do component alpha blending, i.e. alpha blend red, green and blue separatedly.
  This is needed for arbitrary color over abitrary background text with subpixel AA."
 
  | answer prevRule secondPassMap |
  "If combinationRule is rgbMul, we might need the special two-pass technique for component alpha blending.
  If not, do it simply"
  combinationRule = 37 "rgbMul" ifFalse: [
  ^self basicDisplayString: aString from: startIndex to: stopIndex at: aPoint strikeFont: font kern: kernDelta ].
 
  "We need to do a second pass. The colormap set is for use in the second pass."
  secondPassMap := colorMap.
  colorMap := sourceForm depth ~= destForm depth
  ifTrue: [ self cachedFontColormapFrom: sourceForm depth to: destForm depth ].
  answer := self basicDisplayString: aString from: startIndex to: stopIndex at: aPoint strikeFont: font kern: kernDelta.
+ colorMap := secondPassMap.
  secondPassMap ifNotNil: [
  prevRule := combinationRule.
  combinationRule := 20. "rgbAdd"
- colorMap := secondPassMap.
  self basicDisplayString: aString from: startIndex to: stopIndex at: aPoint strikeFont: font kern: kernDelta.
  combinationRule := prevRule ].
  ^answer!