avoid duplicate premultiplication in agg_renderer<T>::setup() #1515

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springmeyer opened this Issue Oct 3, 2012 · 0 comments

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It looks to me like we will end up premultiplying twice in agg_renderer::setup if a background image (with alpha) is used with a background color with alpha after 8c98d8a. Actually could even happen three times as markers are premultiplied during cache population after 3272707.

@PetrDlouhy PetrDlouhy added a commit to PetrDlouhy/mapnik that referenced this issue Aug 22, 2013
@springmeyer springmeyer -avoid potentially premultiplying colors more than once in agg_render…
…er::setup - closes #1515
6ba1c37
@PetrDlouhy PetrDlouhy added a commit to PetrDlouhy/mapnik that referenced this issue Aug 22, 2013
@springmeyer springmeyer update tests after #1515 - many are not ideal due to #1519 1b65c1f
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