linux/drivers/video/console/fbcon_ud.c
Thomas Pfaff 91c4313206 fbcon: fix color generation for monochrome framebuffer
The current attr_fgcol_ec / attr_bgcol_ec macros do a simple shift of bits
to get the color from vc_video_erase_char.  For a monochrome display
however the attribute does not contain any color, only attribute bits.
Furthermore the reverse bit is lost because it is shifted out, the
resulting color is always 0.

This can bee seen on a monochrome console either directly or by setting it
to inverse mode via "setterm -inversescreen on" .  Text is written with
correct color, fb_fillrects from a bit_clear / bit_clear_margins will get
wrong colors.

Signed-off-by: Thomas Pfaff <tpfaff@pcs.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06 10:41:18 -08:00

453 lines
12 KiB
C

/*
* linux/drivers/video/console/fbcon_ud.c -- Software Rotation - 180 degrees
*
* Copyright (C) 2005 Antonino Daplas <adaplas @pol.net>
*
* 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/string.h>
#include <linux/fb.h>
#include <linux/vt_kern.h>
#include <linux/console.h>
#include <asm/types.h>
#include "fbcon.h"
#include "fbcon_rotate.h"
/*
* Rotation 180 degrees
*/
static inline void ud_update_attr(u8 *dst, u8 *src, int attribute,
struct vc_data *vc)
{
int i, offset = (vc->vc_font.height < 10) ? 1 : 2;
int width = (vc->vc_font.width + 7) >> 3;
unsigned int cellsize = vc->vc_font.height * width;
u8 c;
offset = offset * width;
for (i = 0; i < cellsize; i++) {
c = src[i];
if (attribute & FBCON_ATTRIBUTE_UNDERLINE && i < offset)
c = 0xff;
if (attribute & FBCON_ATTRIBUTE_BOLD)
c |= c << 1;
if (attribute & FBCON_ATTRIBUTE_REVERSE)
c = ~c;
dst[i] = c;
}
}
static void ud_bmove(struct vc_data *vc, struct fb_info *info, int sy,
int sx, int dy, int dx, int height, int width)
{
struct fbcon_ops *ops = info->fbcon_par;
struct fb_copyarea area;
u32 vyres = GETVYRES(ops->p->scrollmode, info);
u32 vxres = GETVXRES(ops->p->scrollmode, info);
area.sy = vyres - ((sy + height) * vc->vc_font.height);
area.sx = vxres - ((sx + width) * vc->vc_font.width);
area.dy = vyres - ((dy + height) * vc->vc_font.height);
area.dx = vxres - ((dx + width) * vc->vc_font.width);
area.height = height * vc->vc_font.height;
area.width = width * vc->vc_font.width;
info->fbops->fb_copyarea(info, &area);
}
static void ud_clear(struct vc_data *vc, struct fb_info *info, int sy,
int sx, int height, int width)
{
struct fbcon_ops *ops = info->fbcon_par;
struct fb_fillrect region;
int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
u32 vyres = GETVYRES(ops->p->scrollmode, info);
u32 vxres = GETVXRES(ops->p->scrollmode, info);
region.color = attr_bgcol_ec(bgshift,vc,info);
region.dy = vyres - ((sy + height) * vc->vc_font.height);
region.dx = vxres - ((sx + width) * vc->vc_font.width);
region.width = width * vc->vc_font.width;
region.height = height * vc->vc_font.height;
region.rop = ROP_COPY;
info->fbops->fb_fillrect(info, &region);
}
static inline void ud_putcs_aligned(struct vc_data *vc, struct fb_info *info,
const u16 *s, u32 attr, u32 cnt,
u32 d_pitch, u32 s_pitch, u32 cellsize,
struct fb_image *image, u8 *buf, u8 *dst)
{
struct fbcon_ops *ops = info->fbcon_par;
u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
u32 idx = vc->vc_font.width >> 3;
u8 *src;
while (cnt--) {
src = ops->fontbuffer + (scr_readw(s--) & charmask)*cellsize;
if (attr) {
ud_update_attr(buf, src, attr, vc);
src = buf;
}
if (likely(idx == 1))
__fb_pad_aligned_buffer(dst, d_pitch, src, idx,
image->height);
else
fb_pad_aligned_buffer(dst, d_pitch, src, idx,
image->height);
dst += s_pitch;
}
info->fbops->fb_imageblit(info, image);
}
static inline void ud_putcs_unaligned(struct vc_data *vc,
struct fb_info *info, const u16 *s,
u32 attr, u32 cnt, u32 d_pitch,
u32 s_pitch, u32 cellsize,
struct fb_image *image, u8 *buf,
u8 *dst)
{
struct fbcon_ops *ops = info->fbcon_par;
u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
u32 shift_low = 0, mod = vc->vc_font.width % 8;
u32 shift_high = 8;
u32 idx = vc->vc_font.width >> 3;
u8 *src;
while (cnt--) {
src = ops->fontbuffer + (scr_readw(s--) & charmask)*cellsize;
if (attr) {
ud_update_attr(buf, src, attr, vc);
src = buf;
}
fb_pad_unaligned_buffer(dst, d_pitch, src, idx,
image->height, shift_high,
shift_low, mod);
shift_low += mod;
dst += (shift_low >= 8) ? s_pitch : s_pitch - 1;
shift_low &= 7;
shift_high = 8 - shift_low;
}
info->fbops->fb_imageblit(info, image);
}
static void ud_putcs(struct vc_data *vc, struct fb_info *info,
const unsigned short *s, int count, int yy, int xx,
int fg, int bg)
{
struct fb_image image;
struct fbcon_ops *ops = info->fbcon_par;
u32 width = (vc->vc_font.width + 7)/8;
u32 cellsize = width * vc->vc_font.height;
u32 maxcnt = info->pixmap.size/cellsize;
u32 scan_align = info->pixmap.scan_align - 1;
u32 buf_align = info->pixmap.buf_align - 1;
u32 mod = vc->vc_font.width % 8, cnt, pitch, size;
u32 attribute = get_attribute(info, scr_readw(s));
u8 *dst, *buf = NULL;
u32 vyres = GETVYRES(ops->p->scrollmode, info);
u32 vxres = GETVXRES(ops->p->scrollmode, info);
if (!ops->fontbuffer)
return;
image.fg_color = fg;
image.bg_color = bg;
image.dy = vyres - ((yy * vc->vc_font.height) + vc->vc_font.height);
image.dx = vxres - ((xx + count) * vc->vc_font.width);
image.height = vc->vc_font.height;
image.depth = 1;
if (attribute) {
buf = kmalloc(cellsize, GFP_KERNEL);
if (!buf)
return;
}
s += count - 1;
while (count) {
if (count > maxcnt)
cnt = maxcnt;
else
cnt = count;
image.width = vc->vc_font.width * cnt;
pitch = ((image.width + 7) >> 3) + scan_align;
pitch &= ~scan_align;
size = pitch * image.height + buf_align;
size &= ~buf_align;
dst = fb_get_buffer_offset(info, &info->pixmap, size);
image.data = dst;
if (!mod)
ud_putcs_aligned(vc, info, s, attribute, cnt, pitch,
width, cellsize, &image, buf, dst);
else
ud_putcs_unaligned(vc, info, s, attribute, cnt, pitch,
width, cellsize, &image,
buf, dst);
image.dx += image.width;
count -= cnt;
s -= cnt;
xx += cnt;
}
/* buf is always NULL except when in monochrome mode, so in this case
it's a gain to check buf against NULL even though kfree() handles
NULL pointers just fine */
if (unlikely(buf))
kfree(buf);
}
static void ud_clear_margins(struct vc_data *vc, struct fb_info *info,
int bottom_only)
{
unsigned int cw = vc->vc_font.width;
unsigned int ch = vc->vc_font.height;
unsigned int rw = info->var.xres - (vc->vc_cols*cw);
unsigned int bh = info->var.yres - (vc->vc_rows*ch);
struct fb_fillrect region;
int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
region.color = attr_bgcol_ec(bgshift,vc,info);
region.rop = ROP_COPY;
if (rw && !bottom_only) {
region.dy = 0;
region.dx = info->var.xoffset;
region.width = rw;
region.height = info->var.yres_virtual;
info->fbops->fb_fillrect(info, &region);
}
if (bh) {
region.dy = info->var.yoffset;
region.dx = info->var.xoffset;
region.height = bh;
region.width = info->var.xres;
info->fbops->fb_fillrect(info, &region);
}
}
static void ud_cursor(struct vc_data *vc, struct fb_info *info, int mode,
int softback_lines, int fg, int bg)
{
struct fb_cursor cursor;
struct fbcon_ops *ops = info->fbcon_par;
unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
int w = (vc->vc_font.width + 7) >> 3, c;
int y = real_y(ops->p, vc->vc_y);
int attribute, use_sw = (vc->vc_cursor_type & 0x10);
int err = 1, dx, dy;
char *src;
u32 vyres = GETVYRES(ops->p->scrollmode, info);
u32 vxres = GETVXRES(ops->p->scrollmode, info);
if (!ops->fontbuffer)
return;
cursor.set = 0;
if (softback_lines) {
if (y + softback_lines >= vc->vc_rows) {
mode = CM_ERASE;
ops->cursor_flash = 0;
return;
} else
y += softback_lines;
}
c = scr_readw((u16 *) vc->vc_pos);
attribute = get_attribute(info, c);
src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.height));
if (ops->cursor_state.image.data != src ||
ops->cursor_reset) {
ops->cursor_state.image.data = src;
cursor.set |= FB_CUR_SETIMAGE;
}
if (attribute) {
u8 *dst;
dst = kmalloc(w * vc->vc_font.height, GFP_ATOMIC);
if (!dst)
return;
kfree(ops->cursor_data);
ops->cursor_data = dst;
ud_update_attr(dst, src, attribute, vc);
src = dst;
}
if (ops->cursor_state.image.fg_color != fg ||
ops->cursor_state.image.bg_color != bg ||
ops->cursor_reset) {
ops->cursor_state.image.fg_color = fg;
ops->cursor_state.image.bg_color = bg;
cursor.set |= FB_CUR_SETCMAP;
}
if (ops->cursor_state.image.height != vc->vc_font.height ||
ops->cursor_state.image.width != vc->vc_font.width ||
ops->cursor_reset) {
ops->cursor_state.image.height = vc->vc_font.height;
ops->cursor_state.image.width = vc->vc_font.width;
cursor.set |= FB_CUR_SETSIZE;
}
dy = vyres - ((y * vc->vc_font.height) + vc->vc_font.height);
dx = vxres - ((vc->vc_x * vc->vc_font.width) + vc->vc_font.width);
if (ops->cursor_state.image.dx != dx ||
ops->cursor_state.image.dy != dy ||
ops->cursor_reset) {
ops->cursor_state.image.dx = dx;
ops->cursor_state.image.dy = dy;
cursor.set |= FB_CUR_SETPOS;
}
if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
ops->cursor_reset) {
ops->cursor_state.hot.x = cursor.hot.y = 0;
cursor.set |= FB_CUR_SETHOT;
}
if (cursor.set & FB_CUR_SETSIZE ||
vc->vc_cursor_type != ops->p->cursor_shape ||
ops->cursor_state.mask == NULL ||
ops->cursor_reset) {
char *mask = kmalloc(w*vc->vc_font.height, GFP_ATOMIC);
int cur_height, size, i = 0;
u8 msk = 0xff;
if (!mask)
return;
kfree(ops->cursor_state.mask);
ops->cursor_state.mask = mask;
ops->p->cursor_shape = vc->vc_cursor_type;
cursor.set |= FB_CUR_SETSHAPE;
switch (ops->p->cursor_shape & CUR_HWMASK) {
case CUR_NONE:
cur_height = 0;
break;
case CUR_UNDERLINE:
cur_height = (vc->vc_font.height < 10) ? 1 : 2;
break;
case CUR_LOWER_THIRD:
cur_height = vc->vc_font.height/3;
break;
case CUR_LOWER_HALF:
cur_height = vc->vc_font.height >> 1;
break;
case CUR_TWO_THIRDS:
cur_height = (vc->vc_font.height << 1)/3;
break;
case CUR_BLOCK:
default:
cur_height = vc->vc_font.height;
break;
}
size = cur_height * w;
while (size--)
mask[i++] = msk;
size = (vc->vc_font.height - cur_height) * w;
while (size--)
mask[i++] = ~msk;
}
switch (mode) {
case CM_ERASE:
ops->cursor_state.enable = 0;
break;
case CM_DRAW:
case CM_MOVE:
default:
ops->cursor_state.enable = (use_sw) ? 0 : 1;
break;
}
cursor.image.data = src;
cursor.image.fg_color = ops->cursor_state.image.fg_color;
cursor.image.bg_color = ops->cursor_state.image.bg_color;
cursor.image.dx = ops->cursor_state.image.dx;
cursor.image.dy = ops->cursor_state.image.dy;
cursor.image.height = ops->cursor_state.image.height;
cursor.image.width = ops->cursor_state.image.width;
cursor.hot.x = ops->cursor_state.hot.x;
cursor.hot.y = ops->cursor_state.hot.y;
cursor.mask = ops->cursor_state.mask;
cursor.enable = ops->cursor_state.enable;
cursor.image.depth = 1;
cursor.rop = ROP_XOR;
if (info->fbops->fb_cursor)
err = info->fbops->fb_cursor(info, &cursor);
if (err)
soft_cursor(info, &cursor);
ops->cursor_reset = 0;
}
static int ud_update_start(struct fb_info *info)
{
struct fbcon_ops *ops = info->fbcon_par;
int xoffset, yoffset;
u32 vyres = GETVYRES(ops->p->scrollmode, info);
u32 vxres = GETVXRES(ops->p->scrollmode, info);
int err;
xoffset = vxres - info->var.xres - ops->var.xoffset;
yoffset = vyres - info->var.yres - ops->var.yoffset;
if (yoffset < 0)
yoffset += vyres;
ops->var.xoffset = xoffset;
ops->var.yoffset = yoffset;
err = fb_pan_display(info, &ops->var);
ops->var.xoffset = info->var.xoffset;
ops->var.yoffset = info->var.yoffset;
ops->var.vmode = info->var.vmode;
return err;
}
void fbcon_rotate_ud(struct fbcon_ops *ops)
{
ops->bmove = ud_bmove;
ops->clear = ud_clear;
ops->putcs = ud_putcs;
ops->clear_margins = ud_clear_margins;
ops->cursor = ud_cursor;
ops->update_start = ud_update_start;
}
EXPORT_SYMBOL(fbcon_rotate_ud);
MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
MODULE_DESCRIPTION("Console Rotation (180 degrees) Support");
MODULE_LICENSE("GPL");