• Georg Großberger's avatar
    [BUGFIX] backColor transparent causes black background or flickering · 6dac2bc4
    Georg Großberger authored
    When a GIFBUILDER object has set its backColor option to transparent,
    the background may be black when adding a IMAGE object to it, and inner
    areas of TEXT elements may be completly transparent, ignoring the
    transparency by underlying elements.
    
    This patch, removes the "imagealphablending" function calls, which
    caused the latter issue and adds an additional check to the
    tslib_stdGraphic::imagecopyresized method to prevent useage of the
    imagecopyresized_fix workaround when working with transparency, as
    it is responsible for the black background.
    
    Backwards compatibility is not affected, since upgraded systems will
    not have a backColor=transparent setting, thus have the property
    saveAlphaLayer set to FALSE in any case.
    
    Change-Id: I938802373b9afea03cb49a5e034d82bec0d6c664
    Fixes: #32781
    Releases: 6.0, 4.7, 4.6
    Reviewed-on: http://review.typo3.org/9070
    Reviewed-by: Wouter Wolters
    Reviewed-by: Jigal van Hemert
    Tested-by: Jigal van Hemert
    6dac2bc4