patch-2.1.91 linux/drivers/video/fbcon-cfb32.c

• Lines: 206
• Date: Sat Mar 21 11:12:49 1998
• Orig file: v2.1.90/linux/drivers/video/fbcon-cfb32.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.90/linux/drivers/video/fbcon-cfb32.c linux/drivers/video/fbcon-cfb32.c
@@ -0,0 +1,205 @@
+/*
+ *  linux/drivers/video/cfb32.c -- Low level frame buffer operations for 32 bpp
+ *				   truecolor packed pixels
+ *
+ *	Created 28 Dec 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"
+#include "fbcon-cfb32.h"
+
+
+    /*
+     *  32 bpp packed pixels
+     */
+
+u32 fbcon_cfb32_cmap[16];
+
+void fbcon_cfb32_setup(struct display *p)
+{
+    p->next_line = p->line_length ? p->line_length : p->var.xres_virtual<<2;
+    p->next_plane = 0;
+}
+
+void fbcon_cfb32_bmove(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;
+    u8 *src, *dst;
+
+    if (sx == 0 && dx == 0 && width * 32 == 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 * 32;
+	dst = p->screen_base + dy * linesize + dx * 32;
+	for (rows = height * p->fontheight ; rows-- ;) {
+	    mymemmove(dst, src, width * 32);
+	    src += bytes;
+	    dst += bytes;
+	}
+    } else {
+	src = p->screen_base + (sy+height) * linesize + sx * 32 - bytes;
+	dst = p->screen_base + (dy+height) * linesize + dx * 32 - bytes;
+	for (rows = height * p->fontheight ; rows-- ;) {
+	    mymemmove(dst, src, width * 32);
+	    src -= bytes;
+	    dst -= bytes;
+	}
+    }
+}
+
+void fbcon_cfb32_clear(struct vc_data *conp, struct display *p, int sy, int sx,
+		       int height, int width)
+{
+    u8 *dest0, *dest;
+    int bytes = p->next_line, lines = height * p->fontheight, rows, i;
+    u32 bgx;
+
+    dest = p->screen_base + sy * p->fontheight * bytes + sx * 32;
+
+    bgx = fbcon_cfb32_cmap[attr_bgcol_ec(p, conp)];
+
+    if (sx == 0 && width * 32 == bytes)
+	for (i = 0 ; i < lines * width ; i++) {
+	    ((u32 *)dest)[0] = bgx;
+	    ((u32 *)dest)[1] = bgx;
+	    ((u32 *)dest)[2] = bgx;
+	    ((u32 *)dest)[3] = bgx;
+	    ((u32 *)dest)[4] = bgx;
+	    ((u32 *)dest)[5] = bgx;
+	    ((u32 *)dest)[6] = bgx;
+	    ((u32 *)dest)[7] = bgx;
+	    dest += 32;
+	}
+    else {
+	dest0 = dest;
+	for (rows = lines; rows-- ; dest0 += bytes) {
+	    dest = dest0;
+	    for (i = 0 ; i < width ; i++) {
+		((u32 *)dest)[0] = bgx;
+		((u32 *)dest)[1] = bgx;
+		((u32 *)dest)[2] = bgx;
+		((u32 *)dest)[3] = bgx;
+		((u32 *)dest)[4] = bgx;
+		((u32 *)dest)[5] = bgx;
+		((u32 *)dest)[6] = bgx;
+		((u32 *)dest)[7] = bgx;
+		dest += 32;
+	    }
+	}
+    }
+}
+
+void fbcon_cfb32_putc(struct vc_data *conp, struct display *p, int c, int yy,
+		      int xx)
+{
+    u8 *dest, *cdat;
+    int bytes = p->next_line, rows;
+    u32 eorx, fgx, bgx;
+
+    c &= 0xff;
+
+    dest = p->screen_base + yy * p->fontheight * bytes + xx * 32;
+    cdat = p->fontdata + c * p->fontheight;
+
+    fgx = fbcon_cfb32_cmap[attr_fgcol(p, conp)];
+    bgx = fbcon_cfb32_cmap[attr_bgcol(p, conp)];
+    eorx = fgx ^ bgx;
+
+    for (rows = p->fontheight ; rows-- ; dest += bytes) {
+	u8 bits = *cdat++;
+	((u32 *)dest)[0] = (-(bits >> 7) & eorx) ^ bgx;
+	((u32 *)dest)[1] = (-(bits >> 6 & 1) & eorx) ^ bgx;
+	((u32 *)dest)[2] = (-(bits >> 5 & 1) & eorx) ^ bgx;
+	((u32 *)dest)[3] = (-(bits >> 4 & 1) & eorx) ^ bgx;
+	((u32 *)dest)[4] = (-(bits >> 3 & 1) & eorx) ^ bgx;
+	((u32 *)dest)[5] = (-(bits >> 2 & 1) & eorx) ^ bgx;
+	((u32 *)dest)[6] = (-(bits >> 1 & 1) & eorx) ^ bgx;
+	((u32 *)dest)[7] = (-(bits & 1) & eorx) ^ bgx;
+    }
+}
+
+void fbcon_cfb32_putcs(struct vc_data *conp, struct display *p, const char *s,
+		       int count, int yy, int xx)
+{
+    u8 *cdat, c, *dest, *dest0;
+    int rows, bytes = p->next_line;
+    u32 eorx, fgx, bgx;
+
+    dest0 = p->screen_base + yy * p->fontheight * bytes + xx * 32;
+    fgx = fbcon_cfb32_cmap[attr_fgcol(p, conp)];
+    bgx = fbcon_cfb32_cmap[attr_bgcol(p, conp)];
+    eorx = fgx ^ bgx;
+    while (count--) {
+	c = *s++;
+	cdat = p->fontdata + c * p->fontheight;
+
+	for (rows = p->fontheight, dest = dest0; rows-- ; dest += bytes) {
+	    u8 bits = *cdat++;
+	    ((u32 *)dest)[0] = (-(bits >> 7) & eorx) ^ bgx;
+	    ((u32 *)dest)[1] = (-(bits >> 6 & 1) & eorx) ^ bgx;
+	    ((u32 *)dest)[2] = (-(bits >> 5 & 1) & eorx) ^ bgx;
+	    ((u32 *)dest)[3] = (-(bits >> 4 & 1) & eorx) ^ bgx;
+	    ((u32 *)dest)[4] = (-(bits >> 3 & 1) & eorx) ^ bgx;
+	    ((u32 *)dest)[5] = (-(bits >> 2 & 1) & eorx) ^ bgx;
+	    ((u32 *)dest)[6] = (-(bits >> 1 & 1) & eorx) ^ bgx;
+	    ((u32 *)dest)[7] = (-(bits & 1) & eorx) ^ bgx;
+	}
+	dest0 += 32;
+    }
+}
+
+void fbcon_cfb32_revc(struct display *p, int xx, int yy)
+{
+    u8 *dest;
+    int bytes = p->next_line, rows;
+
+    dest = p->screen_base + yy * p->fontheight * bytes + xx * 32;
+    for (rows = p->fontheight ; rows-- ; dest += bytes) {
+	((u32 *)dest)[0] ^= 0xffffffff;
+	((u32 *)dest)[1] ^= 0xffffffff;
+	((u32 *)dest)[2] ^= 0xffffffff;
+	((u32 *)dest)[3] ^= 0xffffffff;
+	((u32 *)dest)[4] ^= 0xffffffff;
+	((u32 *)dest)[5] ^= 0xffffffff;
+	((u32 *)dest)[6] ^= 0xffffffff;
+	((u32 *)dest)[7] ^= 0xffffffff;
+    }
+}
+
+
+    /*
+     *  `switch' for the low level operations
+     */
+
+struct display_switch fbcon_cfb32 = {
+    fbcon_cfb32_setup, fbcon_cfb32_bmove, fbcon_cfb32_clear, fbcon_cfb32_putc,
+    fbcon_cfb32_putcs, fbcon_cfb32_revc
+};
+
+
+    /*
+     *  Visible symbols for modules
+     */
+
+EXPORT_SYMBOL(fbcon_cfb32);
+EXPORT_SYMBOL(fbcon_cfb32_setup);
+EXPORT_SYMBOL(fbcon_cfb32_bmove);
+EXPORT_SYMBOL(fbcon_cfb32_clear);
+EXPORT_SYMBOL(fbcon_cfb32_putc);
+EXPORT_SYMBOL(fbcon_cfb32_putcs);
+EXPORT_SYMBOL(fbcon_cfb32_revc);
+EXPORT_SYMBOL(fbcon_cfb32_cmap);