[ensembl-dev] itemRgb="On" and useScore=3 down work together

Dan Sheppard ds23 at sanger.ac.uk
Thu Nov 8 17:52:30 GMT 2012

On 08/11/12 17:06, Andrew Tikhonov wrote:
> Dear Anne, James, this doesn't need to be PNG transparency. When you render histograms - at the rendering time - use transparency defined in the colour alpha component, the resulting image doesn't need to be transparent. It will only matter that they overlay properly.

Hi Andrew,

We can apply alpha-blending via GD, but I'm not sure what these 
overlapping things are? At the moment you'd just get a slightly fainter 
histogram, surely? If you want to render two histograms in the same 
place you all the config, ordering, zmenu, etc, issues of composite 
tracks remain, surely, to be overcome before translucency is useful?

Or is the idea that features rendered from a single eg BED file as 
blocks aren't bumped into different vertical positions when they overlap 
but superimpose on top of each other?


More information about the Dev mailing list