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[src/trunk]: src/sys/dev/rasops Support shadow framebuffer for 24bpp screen.



details:   https://anonhg.NetBSD.org/src/rev/5983ef431c8a
branches:  trunk
changeset: 962735:5983ef431c8a
user:      rin <rin%NetBSD.org@localhost>
date:      Tue Jul 30 15:23:23 2019 +0000

description:
Support shadow framebuffer for 24bpp screen.

diffstat:

 sys/dev/rasops/rasops24.c |  125 +++++++++++++++++++++++----------------------
 1 files changed, 64 insertions(+), 61 deletions(-)

diffs (257 lines):

diff -r 0a8e925b5d6e -r 5983ef431c8a sys/dev/rasops/rasops24.c
--- a/sys/dev/rasops/rasops24.c Tue Jul 30 14:57:06 2019 +0000
+++ b/sys/dev/rasops/rasops24.c Tue Jul 30 15:23:23 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: rasops24.c,v 1.38 2019/07/29 16:17:29 rin Exp $        */
+/*     $NetBSD: rasops24.c,v 1.39 2019/07/30 15:23:23 rin Exp $        */
 
 /*-
  * Copyright (c) 1999 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: rasops24.c,v 1.38 2019/07/29 16:17:29 rin Exp $");
+__KERNEL_RCSID(0, "$NetBSD: rasops24.c,v 1.39 2019/07/30 15:23:23 rin Exp $");
 
 #include "opt_rasops.h"
 
@@ -188,9 +188,11 @@
 static void
 rasops24_eraserows(void *cookie, int row, int num, long attr)
 {
-       int n9, n3, n1, cnt, stride, delta;
-       uint32_t *dp, clr, xstamp[3];
-       struct rasops_info *ri;
+       struct rasops_info *ri = (struct rasops_info *)cookie;
+       int n9, n3, n1, cnt, stride;
+       uint32_t *rp, *dp, *hp, clr, xstamp[3];
+
+       hp = NULL;      /* XXX GCC */
 
        /*
         * If the color is gray, we can cheat and use the generic routines
@@ -201,15 +203,13 @@
                return;
        }
 
-       ri = (struct rasops_info *)cookie;
-
 #ifdef RASOPS_CLIPPING
        if (row < 0) {
                num += row;
                row = 0;
        }
 
-       if ((row + num) > ri->ri_rows)
+       if (row + num > ri->ri_rows)
                num = ri->ri_rows - row;
 
        if (num <= 0)
@@ -219,7 +219,7 @@
        clr = ri->ri_devcmap[((uint32_t)attr >> 16) & 0xf] & 0xffffff;
        xstamp[0] = (clr <<  8) | (clr >> 16);
        xstamp[1] = (clr << 16) | (clr >>  8);
-       xstamp[2] = (clr << 24) | clr;
+       xstamp[2] = (clr << 24) |  clr;
 
 #if BYTE_ORDER == LITTLE_ENDIAN
        if ((ri->ri_flg & RI_BSWAP) == 0) {
@@ -240,46 +240,45 @@
        if (num == ri->ri_rows && (ri->ri_flg & RI_FULLCLEAR) != 0) {
                stride = ri->ri_stride;
                num = ri->ri_height;
-               dp = (uint32_t *)ri->ri_origbits;
-               delta = 0;
+               rp = (uint32_t *)ri->ri_origbits;
+               if (ri->ri_hwbits)
+                       hp = (uint32_t *)ri->ri_hworigbits;
        } else {
                stride = ri->ri_emustride;
                num *= ri->ri_font->fontheight;
-               dp = (uint32_t *)(ri->ri_bits + row * ri->ri_yscale);
-               delta = ri->ri_delta;
+               rp = (uint32_t *)(ri->ri_bits + row * ri->ri_yscale);
+               if (ri->ri_hwbits)
+                       hp = (uint32_t *)(ri->ri_hwbits + row * ri->ri_yscale);
        }
 
-       n9 = stride / 36;
-       cnt = (n9 << 5) + (n9 << 2); /* (32*n9) + (4*n9) */
-       n3 = (stride - cnt) / 12;
-       cnt += (n3 << 3) + (n3 << 2); /* (8*n3) + (4*n3) */
-       n1 = (stride - cnt) >> 2;
+       n9 = stride / (4 * 9);
+       cnt = n9 * (4 * 9);
+       n3 = (stride - cnt) / (4 * 3);
+       cnt += n3 * (4 * 3);
+       n1 = (stride - cnt) / 4;
 
        while (num--) {
+               dp = rp;
                for (cnt = n9; cnt; cnt--) {
-                       dp[0] = xstamp[0];
-                       dp[1] = xstamp[1];
-                       dp[2] = xstamp[2];
-                       dp[3] = xstamp[0];
-                       dp[4] = xstamp[1];
-                       dp[5] = xstamp[2];
-                       dp[6] = xstamp[0];
-                       dp[7] = xstamp[1];
-                       dp[8] = xstamp[2];
+                       dp[0] = xstamp[0]; dp[1] = xstamp[1]; dp[2] = xstamp[2];
+                       dp[3] = xstamp[0]; dp[4] = xstamp[1]; dp[5] = xstamp[2];
+                       dp[6] = xstamp[0]; dp[7] = xstamp[1]; dp[8] = xstamp[2];
                        dp += 9;
                }
 
                for (cnt = n3; cnt; cnt--) {
-                       dp[0] = xstamp[0];
-                       dp[1] = xstamp[1];
-                       dp[2] = xstamp[2];
+                       dp[0] = xstamp[0]; dp[1] = xstamp[1]; dp[2] = xstamp[2];
                        dp += 3;
                }
 
                for (cnt = 0; cnt < n1; cnt++)
                        *dp++ = xstamp[cnt];
 
-               DELTA(dp, delta, uint32_t *);
+               if (ri->ri_hwbits) {
+                       memcpy(hp, rp, stride);
+                       DELTA(hp, ri->ri_stride, uint32_t *);
+               }
+               DELTA(rp, ri->ri_stride, uint32_t *);
        }
 }
 
@@ -289,10 +288,12 @@
 static void
 rasops24_erasecols(void *cookie, int row, int col, int num, long attr)
 {
-       int n12, n4, height, cnt, slop, clr, xstamp[3];
-       struct rasops_info *ri;
-       uint32_t *dp, *rp;
-       uint8_t *dbp;
+       struct rasops_info *ri = (struct rasops_info *)cookie;
+       int n12, n4, height, cnt, slop1, slop2, clr, xstamp[3];
+       uint32_t *dp;
+       uint8_t *rp, *hp, *dbp;
+
+       hp = NULL;      /* XXX GCC */
 
        /*
         * If the color is gray, we can cheat and use the generic routines
@@ -303,8 +304,6 @@
                return;
        }
 
-       ri = (struct rasops_info *)cookie;
-
 #ifdef RASOPS_CLIPPING
        /* Catches 'row < 0' case too */
        if ((unsigned)row >= (unsigned)ri->ri_rows)
@@ -315,21 +314,24 @@
                col = 0;
        }
 
-       if ((col + num) > ri->ri_cols)
+       if (col + num > ri->ri_cols)
                num = ri->ri_cols - col;
 
        if (num <= 0)
                return;
 #endif
 
-       rp = (uint32_t *)(ri->ri_bits + row*ri->ri_yscale + col*ri->ri_xscale);
+       rp = ri->ri_bits + row * ri->ri_yscale + col * ri->ri_xscale;
+       if (ri->ri_hwbits)
+               hp = ri->ri_hwbits + row * ri->ri_yscale + col * ri->ri_xscale;
+
        num *= ri->ri_font->fontwidth;
        height = ri->ri_font->fontheight;
 
        clr = ri->ri_devcmap[((uint32_t)attr >> 16) & 0xf] & 0xffffff;
        xstamp[0] = (clr <<  8) | (clr >> 16);
        xstamp[1] = (clr << 16) | (clr >>  8);
-       xstamp[2] = (clr << 24) | clr;
+       xstamp[2] = (clr << 24) |  clr;
 
 #if BYTE_ORDER == LITTLE_ENDIAN
        if ((ri->ri_flg & RI_BSWAP) == 0) {
@@ -350,53 +352,54 @@
         *
         *      aaab bbcc cddd
         */
-       slop = (int)(long)rp & 3;       num -= slop;
-       n12 = num / 12;         num -= (n12 << 3) + (n12 << 2);
-       n4 = num >> 2;          num &= 3;
+       slop1 = (uintptr_t)rp & 3;
+       cnt = slop1;
+       n12 = (num - cnt) / 12;
+       cnt += n12 * 12;
+       n4 = (num - cnt) / 4;
+       cnt += n4 * 4;
+       slop2 = num - cnt;
 
        while (height--) {
-               dbp = (uint8_t *)rp;
-               DELTA(rp, ri->ri_stride, uint32_t *);
+               dbp = rp;
 
                /* Align to 4 bytes */
                /* XXX handle with masks, bring under control of RI_BSWAP */
-               for (cnt = slop; cnt; cnt--) {
+               for (cnt = slop1; cnt; cnt--) {
                        *dbp++ = (clr >> 16);
                        *dbp++ = (clr >> 8);
-                       *dbp++ = clr;
+                       *dbp++ =  clr;
                }
 
                dp = (uint32_t *)dbp;
 
                /* 12 pels per loop */
                for (cnt = n12; cnt; cnt--) {
-                       dp[0] = xstamp[0];
-                       dp[1] = xstamp[1];
-                       dp[2] = xstamp[2];
-                       dp[3] = xstamp[0];
-                       dp[4] = xstamp[1];
-                       dp[5] = xstamp[2];
-                       dp[6] = xstamp[0];
-                       dp[7] = xstamp[1];
-                       dp[8] = xstamp[2];
+                       dp[0] = xstamp[0]; dp[1] = xstamp[1]; dp[2] = xstamp[2];
+                       dp[3] = xstamp[0]; dp[4] = xstamp[1]; dp[5] = xstamp[2];
+                       dp[6] = xstamp[0]; dp[7] = xstamp[1]; dp[8] = xstamp[2];
                        dp += 9;
                }
 
                /* 4 pels per loop */
                for (cnt = n4; cnt; cnt--) {
-                       dp[0] = xstamp[0];
-                       dp[1] = xstamp[1];
-                       dp[2] = xstamp[2];
+                       dp[0] = xstamp[0]; dp[1] = xstamp[1]; dp[2] = xstamp[2];
                        dp += 3;
                }
 
                /* Trailing slop */
                /* XXX handle with masks, bring under control of RI_BSWAP */
                dbp = (uint8_t *)dp;
-               for (cnt = num; cnt; cnt--) {
+               for (cnt = slop2; cnt; cnt--) {
                        *dbp++ = (clr >> 16);
                        *dbp++ = (clr >> 8);
-                       *dbp++ = clr;
+                       *dbp++ =  clr;
                }
+
+               if (ri->ri_hwbits) {
+                       memcpy(hp, rp, num * 3);
+                       hp += ri->ri_stride;
+               }
+               rp += ri->ri_stride;
        }
 }



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