rework the dblbuf framebuffer module's blutter heavily, based on work

by loren merritt. roughly 3-4 times as fast as the old code with
slightly increased memory usage. still only supports 8bpp and font
width of 8, for now, but the new design is more easily extended to
16bpp and 32bpp than the old one.

1 files changed, 1 insertions, 1 deletions

diff --git a/refresh.c b/refresh.c
index b1766d2..6b24dbe 100644
--- a/refresh.c
+++ b/refresh.c
@@ -37,7 +37,7 @@ void uuterm_refresh_row(struct uudisp *d, struct uurow *row, int x1, int x2)
 		extract_cell(ch[(x+1)&3], &row->cells[x+1]);
 		for (i=0; i<sizeof(ch[0]) && ch[x&3][i]; i++) {
 			const void *glyph = lookup_glyph(ch[x&3], i, ch[(x+3)&3], ch[(x+1)&3]);
-			uudisp_draw_glyph(d, row->idx, x, glyph, row->cells[x].a);
+			uudisp_draw_glyph(d, row->idx, x, glyph, row->cells[x].a & 0xff);
 		}
 	}
 }