[poppler] Implement Type 4, 5, 6, 7 shadings using cairo mesh gradients

[Albert Astals Cid]

A Dilluns, 24 de gener de 2011, Thomas Freitag va escriure:
> Am 24.01.2011 14:17, schrieb Carlos Garcia Campos:
> > Cairo 1.11.2 has a new mesh pattern that can be used to implement 6/7
> > type gradients. Adrian has an updated poppler branch that implements
> > mesh gradients in cairo backend:
> > 
> > http://cgit.freedesktop.org/~ajohnson/poppler/log/?h=mesh
> > 
> > I've tried it and it works great, it fixes bugs #28836 and #32791 (and
> > maybe others). I haven't pushed the patch yet becuase it contains
> > minimal changes in Gfx.cc. If nobody objects I'll push it to master
> > branch only.
> 
> I had a quick look at what Adrian has done in Gfc.cc, and think, that is
> a little bit misusing of out->gouraudTriangleShadedFill( state, shading)
> and out->patchMeshShadedFill( state, shading):
> 
> When these functions returns gTrue, this indicates that all work has
> already be done in the output device. How Adrian implements it is very
> special to Cairo. But it is quite ease to change it:
> Just move the lines

Agreed with Thomas.

Albert