Feature #21886
closed
Enables rotation of gifbuilder images with transparent background avoiding ugly triangles / step patterns
0%
Description
Using the EFFECTS / rotate method to rotate gifbuilder objects by angles different from 90/180/270° results in images surrounded by triangles in the background color. The simple 1 bit opacity approach supportet by gifbuilder produces ugly step patterns due to anti aliasing if transparency is enabled.
Using recent versions of IM / GD allows to create png-24 images with 8 bit alpha channels. However it is not possible to use this feature in a typo3 4.3.0 installation.
The appended patch allows to rotate images in front of a (by default) transparent background using 8 bit alpha. I know that it is not a clean solution but I hope to show that it is possible to provide a better alpha support with recent versions of the libraries used by typo3. It would be great to find a better support for 8 bit alpha in upcoming typo3 releases.
A result of the appended patch can be seen on http://baeckerbuben.com (the buttons on the left side are dynamically created using gifbuilder).
(issue imported from #M13101)
Files
Updated by Alexander Opitz almost 11 years ago
- Status changed from New to Needs Feedback
- Target version deleted (
0) - TYPO3 Version set to 4.3
The issue is very old, does this issue exists in newer versions of TYPO3 CMS (4.5 or 6.1)?
Updated by Alexander Opitz over 10 years ago
- Status changed from Needs Feedback to Closed
No feedback for over 90 days.