Massimo Valentini authored Jan 18, 2018 and Ell committed Mar 25, 2018

In gimp_brush_core_color_area_with_pixmap(), use the native area
format when painting the brush, instead of always going through
"RGBA float", and create the pixmap -> area fish only once, instead
of once per scanrow.

In gimp_brush_core_paint_line_pixmap_mask(), avoid modulus
calculation at each pixel.

See bug #694917.