Opened 13 years ago

Closed 13 years ago

#2745 closed defect (fixed)

Turtleart doesn't fill offscreen surface area with content.

Reported by: greenfeld Owned by: walter
Priority: Unspecified by Maintainer Milestone: Unspecified
Component: Turtleart Version: 0.92.x
Severity: Minor Keywords: 11.2.0
Cc: Distribution/OS: OLPC
Bug Status: New

Description

godiard spotted a "video corruption" issue with TurtleArt which likely is TurtleArt's fault.

According to jnettlet, Turtle art draws a rendering surface larger than the screen. but doesn't fill it with a background color beyond the dimensions of the screen. So the contents of offscreen video memory are seen once you scroll down or sideways past what already is rendered, which could look like many things depending on what is in video RAM at that point.

Reproduction:

  1. Start Turtleart.
  2. Using the scrollbars for the main canvas, scroll downward in the drawing area a significant amount.

Seen in OLPC 11.2.0 os14 on both XO-1 & XO-1.5.

Change History (2)

comment:1 Changed 13 years ago by greenfeld

  • Keywords 11.2.0 added

comment:2 Changed 13 years ago by walter

  • Resolution set to fixed
  • Status changed from new to closed

​http://git.sugarlabs.org/turtleart/mainline/commit/6af63b82066eaa3026815ea22b41db4bb6f7ae5b

I think the behaviour will now be as expected.

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