clintbellanger/flare — pull request #538 by dorkster (2012-07-09 10:04:59+00:00)
Title: Make WidgetScrollBox transparent

Since the surface that we want to blit to is now transparent, we need to use SDL_gfxBlitRGBA to apply those things. I've updated the widgets so that we can set render_to_alpha = true if we want to blit said widget onto a WidgetScrollBox.

I also added an update variable to WidgetScrollBox, to prevent updating the contents every frame (which can be really slow with SDL_gfxBlitRGBA).