[src/trunk]: src/sys/arch/sparc/dev When constructing `ri_devcmap[]', pack fo...

[pk <pk%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/0d720fc77208
branches:  trunk
changeset: 485063:0d720fc77208
user:      pk <pk%NetBSD.org@localhost>
date:      Mon Apr 17 20:37:28 2000 +0000

description:
When constructing `ri_devcmap[]', pack four instances of the LUTs in each
32 bit wide entry (as not documented in the non-existent rasops(9)..)

diffstat:

 sys/arch/sparc/dev/fb.c |  17 +++++++++++++----
 1 files changed, 13 insertions(+), 4 deletions(-)

diffs (45 lines):

diff -r fca6e4542e06 -r 0d720fc77208 sys/arch/sparc/dev/fb.c
--- a/sys/arch/sparc/dev/fb.c   Mon Apr 17 20:36:23 2000 +0000
+++ b/sys/arch/sparc/dev/fb.c   Mon Apr 17 20:37:28 2000 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: fb.c,v 1.44 2000/04/16 22:12:05 pk Exp $ */
+/*     $NetBSD: fb.c,v 1.45 2000/04/17 20:37:28 pk Exp $ */
 
 /*
  * Copyright (c) 1992, 1993
@@ -456,23 +456,32 @@
        if (ri->ri_depth == 8) {
                int i;
                for (i = 0; i < 16; i++) {
+
+                       /*
+                        * Cmap entries are repeated four times in the
+                        * 32 bit wide `devcmap' entries for optimization
+                        * purposes; see rasops(9)
+                        */
+#define I_TO_DEVCMAP(i)        ((i) | ((i)<<8) | ((i)<<16) | ((i)<<24))
+
                        /*
                         * Use existing colormap entries for black and white
                         */
                        if ((i & 7) == WSCOL_BLACK) {
-                               ri->ri_devcmap[i] = 255;
+                               ri->ri_devcmap[i] = I_TO_DEVCMAP(255);
                                continue;
                        }
 
                        if ((i & 7) == WSCOL_WHITE) {
-                               ri->ri_devcmap[i] = 0;
+                               ri->ri_devcmap[i] = I_TO_DEVCMAP(0);
                                continue;
                        }
                        /*
                         * Other entries refer to ANSI map, which for now
                         * is setup in bt_subr.c
                         */
-                       ri->ri_devcmap[i] = i + 1;
+                       ri->ri_devcmap[i] = I_TO_DEVCMAP(i + 1);
+#undef I_TO_DEVCMAP
                }
        }