A new version of GraphicsTests was added to project The Trunk: http://source.squeak.org/trunk/GraphicsTests-wiz.23.mcz
==================== Summary ====================
Name: GraphicsTests-wiz.23 Author: wiz Time: 29 April 2010, 2:18:35.461 am UUID: 98625695-e54f-407f-b627-a90e6d5dfa80 Ancestors: GraphicsTests-ar.22
This adds a test demonstrating that rectangles will change shape when their dimensions are rounded if the origin and corner are in different quadrants.
See Mantis 2453 http://bugs.squeak.org/view.php?id=2453
The condition for this to happen occurs anytime a morph with odd extent is rendered by a transformation morph.
Yours in curiosity and service, --Jerome Peace
=============== Diff against GraphicsTests-ar.22 ===============
Item was added: + ----- Method: RectangleTest>>testRoundingAfterHalfPixelTranslation (in category 'tests') ----- + testRoundingAfterHalfPixelTranslation + "A rectangle right on the cusp of rounding changes shape if origin and + corner are in differenct quadrants" + "self debug: #testRoundingAfterHalfPixelTranslation" + | trouble noTrouble | + trouble := 10 negated asPoint rect: 10 asPoint. + noTrouble := trouble translateBy: 15. + + 10 timesRepeat: [trouble := (trouble translateBy: 0.5) rounded]. + 10 timesRepeat: [noTrouble := (noTrouble translateBy: 0.5) rounded]. + + self assert: trouble extent = noTrouble extent!