patch-2.1.67 linux/drivers/video/fbcon-cfb8.c

• Lines: 219
• Date: Tue Sep 16 02:29:34 1997
• Orig file: v2.1.66/linux/drivers/video/fbcon-cfb8.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.66/linux/drivers/video/fbcon-cfb8.c linux/drivers/video/fbcon-cfb8.c
@@ -0,0 +1,218 @@
+/*
+ *  linux/drivers/video/cfb8.c -- Low level frame buffer operations for 8 bpp
+ *				  packed pixels
+ *
+ *	Created 5 Apr 1997 by Geert Uytterhoeven
+ *
+ *  This file is subject to the terms and conditions of the GNU General Public
+ *  License.  See the file COPYING in the main directory of this archive for
+ *  more details.
+ */
+
+#include <linux/module.h>
+#include <linux/tty.h>
+#include <linux/console.h>
+#include <linux/string.h>
+#include <linux/config.h>
+#include <linux/fb.h>
+
+#include "fbcon.h"
+
+
+    /*
+     *  Prototypes
+     */
+
+static int open_cfb8(struct display *p);
+static void release_cfb8(void);
+static void bmove_cfb8(struct display *p, int sy, int sx, int dy, int dx,
+		       int height, int width);
+static void clear_cfb8(struct vc_data *conp, struct display *p, int sy,
+		       int sx, int height, int width);
+static void putc_cfb8(struct vc_data *conp, struct display *p, int c, int yy,
+		      int xx);
+static void putcs_cfb8(struct vc_data *conp, struct display *p,
+		       const char *s, int count, int yy, int xx);
+static void rev_char_cfb8(struct display *p, int xx, int yy);
+
+
+    /*
+     *  `switch' for the low level operations
+     */
+
+static struct display_switch dispsw_cfb8 = {
+    open_cfb8, release_cfb8, bmove_cfb8, clear_cfb8, putc_cfb8, putcs_cfb8,
+    rev_char_cfb8
+};
+
+
+    /*
+     *  8 bpp packed pixels
+     */
+
+static u_long nibbletab_cfb8[] = {
+    0x00000000,0x000000ff,0x0000ff00,0x0000ffff,
+    0x00ff0000,0x00ff00ff,0x00ffff00,0x00ffffff,
+    0xff000000,0xff0000ff,0xff00ff00,0xff00ffff,
+    0xffff0000,0xffff00ff,0xffffff00,0xffffffff
+};
+
+static int open_cfb8(struct display *p)
+{
+    if (p->type != FB_TYPE_PACKED_PIXELS || p->var.bits_per_pixel != 8)
+	return -EINVAL;
+
+    p->next_line = p->var.xres_virtual;
+    p->next_plane = 0;
+    MOD_INC_USE_COUNT;
+    return 0;
+}
+
+static void release_cfb8(void)
+{
+    MOD_DEC_USE_COUNT;
+}
+
+static void bmove_cfb8(struct display *p, int sy, int sx, int dy, int dx,
+		       int height, int width)
+{
+    int bytes = p->next_line, linesize = bytes * p->fontheight, rows;
+    u_char *src,*dst;
+
+    if (sx == 0 && dx == 0 && width * 8 == bytes)
+	mymemmove(p->screen_base + dy * linesize,
+		  p->screen_base + sy * linesize,
+		  height * linesize);
+    else if (dy < sy || (dy == sy && dx < sx)) {
+	src = p->screen_base + sy * linesize + sx * 8;
+	dst = p->screen_base + dy * linesize + dx * 8;
+	for (rows = height * p->fontheight ; rows-- ;) {
+	    mymemmove(dst, src, width * 8);
+	    src += bytes;
+	    dst += bytes;
+	}
+    } else {
+	src = p->screen_base + (sy+height) * linesize + sx * 8 - bytes;
+	dst = p->screen_base + (dy+height) * linesize + dx * 8 - bytes;
+	for (rows = height * p->fontheight ; rows-- ;) {
+	    mymemmove(dst, src, width * 8);
+	    src -= bytes;
+	    dst -= bytes;
+	}
+    }
+}
+
+static void clear_cfb8(struct vc_data *conp, struct display *p, int sy, int sx,
+		       int height, int width)
+{
+    u_char *dest0,*dest;
+    int bytes=p->next_line,lines=height * p->fontheight, rows, i;
+    u_long bgx;
+
+    dest = p->screen_base + sy * p->fontheight * bytes + sx * 8;
+
+    bgx=attr_bgcol_ec(p,conp);
+    bgx |= (bgx << 8);
+    bgx |= (bgx << 16);
+
+    if (sx == 0 && width * 8 == bytes)
+	for (i = 0 ; i < lines * width ; i++) {
+	    ((u_long *)dest)[0]=bgx;
+	    ((u_long *)dest)[1]=bgx;
+	    dest+=8;
+	}
+    else {
+	dest0=dest;
+	for (rows = lines; rows-- ; dest0 += bytes) {
+	    dest=dest0;
+	    for (i = 0 ; i < width ; i++) {
+		((u_long *)dest)[0]=bgx;
+		((u_long *)dest)[1]=bgx;
+		dest+=8;
+	    }
+	}
+    }
+}
+
+static void putc_cfb8(struct vc_data *conp, struct display *p, int c, int yy,
+		      int xx)
+{
+    u_char *dest,*cdat;
+    int bytes=p->next_line,rows;
+    ulong eorx,fgx,bgx;
+
+    c &= 0xff;
+
+    dest = p->screen_base + yy * p->fontheight * bytes + xx * 8;
+    cdat = p->fontdata + c * p->fontheight;
+
+    fgx=attr_fgcol(p,conp);
+    bgx=attr_bgcol(p,conp);
+    fgx |= (fgx << 8);
+    fgx |= (fgx << 16);
+    bgx |= (bgx << 8);
+    bgx |= (bgx << 16);
+    eorx = fgx ^ bgx;
+
+    for (rows = p->fontheight ; rows-- ; dest += bytes) {
+	((u_long *)dest)[0]= (nibbletab_cfb8[*cdat >> 4] & eorx) ^ bgx;
+	((u_long *)dest)[1]= (nibbletab_cfb8[*cdat++ & 0xf] & eorx) ^ bgx;
+    }
+}
+
+static void putcs_cfb8(struct vc_data *conp, struct display *p, const char *s,
+		       int count, int yy, int xx)
+{
+    u_char *cdat, c, *dest, *dest0;
+    int rows,bytes=p->next_line;
+    u_long eorx, fgx, bgx;
+
+    dest0 = p->screen_base + yy * p->fontheight * bytes + xx * 8;
+    fgx=attr_fgcol(p,conp);
+    bgx=attr_bgcol(p,conp);
+    fgx |= (fgx << 8);
+    fgx |= (fgx << 16);
+    bgx |= (bgx << 8);
+    bgx |= (bgx << 16);
+    eorx = fgx ^ bgx;
+    while (count--) {
+	c = *s++;
+	cdat = p->fontdata + c * p->fontheight;
+
+	for (rows = p->fontheight, dest = dest0; rows-- ; dest += bytes) {
+	    ((u_long *)dest)[0]= (nibbletab_cfb8[*cdat >> 4] & eorx) ^ bgx;
+	    ((u_long *)dest)[1]= (nibbletab_cfb8[*cdat++ & 0xf] & eorx) ^
+				 bgx;
+	}
+	dest0+=8;
+    }
+}
+
+static void rev_char_cfb8(struct display *p, int xx, int yy)
+{
+    u_char *dest;
+    int bytes=p->next_line, rows;
+
+    dest = p->screen_base + yy * p->fontheight * bytes + xx * 8;
+    for (rows = p->fontheight ; rows-- ; dest += bytes) {
+	((u_long *)dest)[0] ^= 0x0f0f0f0f;
+	((u_long *)dest)[1] ^= 0x0f0f0f0f;
+    }
+}
+
+
+#ifdef MODULE
+int init_module(void)
+#else
+int fbcon_init_cfb8(void)
+#endif
+{
+    return(fbcon_register_driver(&dispsw_cfb8, 0));
+}
+
+#ifdef MODULE
+void cleanup_module(void)
+{
+    fbcon_unregister_driver(&dispsw_cfb8);
+}
+#endif /* MODULE */