This reworks the text renderer system to make it easier to write backends.
We also allow returning errors during rendering now.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
The bit-blitting renderer does not really use the helper structure so
remove it and simplify the code a lot.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
The console layer guarantees that all glyphs are sent to the renderer so
there is no need to clear the screen before redrawing.
This reduces flickering of single-buffered video backends.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
The freetype2 renderer uses ft2 and fontconfig to provide a very
simplistic renderer. We also simplify the logic of the whole subsystem a
lot and guarantee that each glyph will have the same size now.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
The bblit text-renderer is the most basic renderer which simply blits or
blends the glyphs into the framebuffer memory. It cannot be used with
displays that do not provide framebuffer access but only 3D access.
However, 3D rendering is currently broken, anyway, so we can ignore it.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
