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freebsd-nq/sys/dev/syscons/scgfbrndr.c
Bruce Evans f3ac3a6e6f Special rendering methods for removing mouse cursors cannot be removed 
like I hoped, since they are needed for removing parts over the border.
Continue fixing bugs in them.

In the vga planar mode renderer, remove removal of the part of the
image over the text window.  This was hard-coded for nearly 8x16 fonts
and in practice didn't remove enough for 8x8 fonts.  This used the
wrong attribute over cutmarked regions.  The caller refreshes with the
correct attribute later, so the attribute bug only caused flicker.
The caller uses the same hard-coding, so the refreshes fix up all the
spots with the wrong attribute, but keep missing the missed spots.
This still gives trails of bits of cursors for cursor motions in the
affected configurations (mainly depth 4 modes with 8x8) fonts.  8x14
fonts barely escape the problem since although the cursor is drawn
as 16x16, its active part is only 9x13 and the active part fits in
the hard-coded 2x2 character cell window for 8x14 fonts.  8x8 fonts
need a 2x3 window.

In the fb non-sparc64 renderer, the buggy image removal was buggier
and was already avoided by returning before it.  Remove it completely
and fix nearby style bugs.  It was essentially the same as for the vga
planar mode renderer (obfuscated by swapping x and y).  This was buggier
since fb should handle more types of hardware so the hard-coding is
wronger.

The remaining fb image removal is also buggier.  It never supported
software cursors drawn into the border, and the hardware cursor is
probably broken by other bugs to be fixed soon.
2017-04-10 06:19:09 +00:00

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/*-
* Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer as
* the first lines of this file unmodified.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Copyright (c) 2000 Andrew Miklic
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_syscons.h"
#include "opt_gfb.h"
#ifdef __powerpc__
#include "opt_ofwfb.h"
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/fbio.h>
#include <sys/consio.h>
#include <machine/bus.h>
#include <dev/fb/fbreg.h>
#include <dev/syscons/syscons.h>
#ifndef SC_RENDER_DEBUG
#define SC_RENDER_DEBUG 0
#endif
static vr_clear_t gfb_clear;
static vr_draw_border_t gfb_border;
static vr_draw_t gfb_draw;
static vr_set_cursor_t gfb_cursor_shape;
static vr_draw_cursor_t gfb_cursor;
static vr_blink_cursor_t gfb_blink;
#ifndef SC_NO_CUTPASTE
static vr_draw_mouse_t gfb_mouse;
#else
#define gfb_mouse (vr_draw_mouse_t *)gfb_nop
#endif
static void gfb_nop(scr_stat *scp);
sc_rndr_sw_t txtrndrsw = {
(vr_init_t *)gfb_nop,
gfb_clear,
gfb_border,
gfb_draw,
gfb_cursor_shape,
gfb_cursor,
gfb_blink,
(vr_set_mouse_t *)gfb_nop,
gfb_mouse,
};
#ifdef SC_PIXEL_MODE
sc_rndr_sw_t gfbrndrsw = {
(vr_init_t *)gfb_nop,
gfb_clear,
gfb_border,
gfb_draw,
gfb_cursor_shape,
gfb_cursor,
gfb_blink,
(vr_set_mouse_t *)gfb_nop,
gfb_mouse,
};
#endif /* SC_PIXEL_MODE */
#ifndef SC_NO_MODE_CHANGE
sc_rndr_sw_t grrndrsw = {
(vr_init_t *)gfb_nop,
(vr_clear_t *)gfb_nop,
gfb_border,
(vr_draw_t *)gfb_nop,
(vr_set_cursor_t *)gfb_nop,
(vr_draw_cursor_t *)gfb_nop,
(vr_blink_cursor_t *)gfb_nop,
(vr_set_mouse_t *)gfb_nop,
(vr_draw_mouse_t *)gfb_nop,
};
#endif /* SC_NO_MODE_CHANGE */
#ifndef SC_NO_CUTPASTE
#ifdef __sparc64__
static u_char mouse_pointer[22 * 2] = {
0x00, 0x00, /* ............ */
0x80, 0x00, /* *........... */
0xc0, 0x00, /* **.......... */
0xe0, 0x00, /* ***......... */
0xf0, 0x00, /* ****........ */
0xf8, 0x00, /* *****....... */
0xfc, 0x00, /* ******...... */
0xfe, 0x00, /* *******..... */
0xff, 0x00, /* ********.... */
0xff, 0x80, /* *********... */
0xfc, 0xc0, /* ******..**.. */
0xdc, 0x00, /* **.***...... */
0x8e, 0x00, /* *...***..... */
0x0e, 0x00, /* ....***..... */
0x07, 0x00, /* .....***.... */
0x04, 0x00, /* .....*...... */
0x00, 0x00, /* ............ */
0x00, 0x00, /* ............ */
0x00, 0x00, /* ............ */
0x00, 0x00, /* ............ */
0x00, 0x00, /* ............ */
0x00, 0x00 /* ............ */
};
#else
static u_char mouse_pointer[16] = {
0x00, 0x40, 0x60, 0x70, 0x78, 0x7c, 0x7e, 0x68,
0x0c, 0x0c, 0x06, 0x06, 0x00, 0x00, 0x00, 0x00
};
#endif
#endif
static void
gfb_nop(scr_stat *scp)
{
}
/* text mode renderer */
static void
gfb_clear(scr_stat *scp, int c, int attr)
{
vidd_clear(scp->sc->adp);
}
static void
gfb_border(scr_stat *scp, int color)
{
vidd_set_border(scp->sc->adp, color);
}
static void
gfb_draw(scr_stat *scp, int from, int count, int flip)
{
int c;
int a;
int i, n;
video_adapter_t *adp;
adp = scp->sc->adp;
/*
Determine if we need to scroll based on the offset
and the number of characters to be displayed...
*/
if (from + count > scp->xsize*scp->ysize) {
/*
Calculate the number of characters past the end of the
visible screen...
*/
count = (from + count) -
(adp->va_info.vi_width * adp->va_info.vi_height);
/*
Calculate the number of rows past the end of the visible
screen...
*/
n = (count / adp->va_info.vi_width) + 1;
/* Scroll to make room for new text rows... */
vidd_copy(adp, n, 0, n);
#if 0
vidd_clear(adp, n);
#endif
/* Display new text rows... */
vidd_puts(adp, from,
(u_int16_t *)sc_vtb_pointer(&scp->vtb, from), count);
}
/*
We don't need to scroll, so we can just put the characters
all-at-once...
*/
else {
/*
Determine the method by which we are to display characters
(are we going to print forwards or backwards?
do we need to do a character-by-character copy, then?)...
*/
if (flip)
for (i = count; i-- > 0; ++from) {
c = sc_vtb_getc(&scp->vtb, from);
a = sc_vtb_geta(&scp->vtb, from) >> 8;
vidd_putc(adp, from, c,
(a >> 4) | ((a & 0xf) << 4));
}
else {
vidd_puts(adp, from,
(u_int16_t *)sc_vtb_pointer(&scp->vtb, from),
count);
}
}
}
static void
gfb_cursor_shape(scr_stat *scp, int base, int height, int blink)
{
if (base < 0 || base >= scp->font_size)
return;
/* the caller may set height <= 0 in order to disable the cursor */
#if 0
scp->cursor_base = base;
scp->cursor_height = height;
#endif
vidd_set_hw_cursor_shape(scp->sc->adp, base, height, scp->font_size,
blink);
}
static int pxlblinkrate = 0;
#if defined(__sparc64__) || defined(SC_OFWFB)
static void
gfb_cursor(scr_stat *scp, int at, int blink, int on, int flip)
{
video_adapter_t *adp;
int a, c;
if (scp->curs_attr.height <= 0) /* the text cursor is disabled */
return;
adp = scp->sc->adp;
if(blink) {
scp->status |= VR_CURSOR_BLINK;
if (on) {
scp->status |= VR_CURSOR_ON;
vidd_set_hw_cursor(adp, at%scp->xsize, at/scp->xsize);
} else {
if (scp->status & VR_CURSOR_ON)
vidd_set_hw_cursor(adp, -1, -1);
scp->status &= ~VR_CURSOR_ON;
}
} else {
scp->status &= ~VR_CURSOR_BLINK;
if(on) {
scp->status |= VR_CURSOR_ON;
vidd_putc(scp->sc->adp, scp->cursor_oldpos,
sc_vtb_getc(&scp->vtb, scp->cursor_oldpos),
sc_vtb_geta(&scp->vtb, scp->cursor_oldpos) >> 8);
a = sc_vtb_geta(&scp->vtb, at) >> 8;
c = sc_vtb_getc(&scp->vtb, at);
vidd_putc(scp->sc->adp, at, c,
(a >> 4) | ((a & 0xf) << 4));
} else {
if (scp->status & VR_CURSOR_ON)
vidd_putc(scp->sc->adp, at,
sc_vtb_getc(&scp->vtb, at),
sc_vtb_geta(&scp->vtb, at) >> 8);
scp->status &= ~VR_CURSOR_ON;
}
}
}
#else
static void
gfb_cursor(scr_stat *scp, int at, int blink, int on, int flip)
{
video_adapter_t *adp;
adp = scp->sc->adp;
if (scp->curs_attr.height <= 0)
/* the text cursor is disabled */
return;
if (on) {
if (!blink) {
scp->status |= VR_CURSOR_ON;
vidd_set_hw_cursor(adp, at%scp->xsize, at/scp->xsize);
} else if (++pxlblinkrate & 4) {
pxlblinkrate = 0;
scp->status ^= VR_CURSOR_ON;
if(scp->status & VR_CURSOR_ON)
vidd_set_hw_cursor(adp, at%scp->xsize,
at/scp->xsize);
else
vidd_set_hw_cursor(adp, -1, -1);
}
} else {
if (scp->status & VR_CURSOR_ON)
vidd_set_hw_cursor(adp, at%scp->xsize, at/scp->xsize);
scp->status &= ~VR_CURSOR_ON;
}
if (blink)
scp->status |= VR_CURSOR_BLINK;
else
scp->status &= ~VR_CURSOR_BLINK;
}
#endif
static void
gfb_blink(scr_stat *scp, int at, int flip)
{
if (!(scp->status & VR_CURSOR_BLINK))
return;
if (!(++pxlblinkrate & 4))
return;
pxlblinkrate = 0;
scp->status ^= VR_CURSOR_ON;
gfb_cursor(scp, at, scp->status & VR_CURSOR_BLINK,
scp->status & VR_CURSOR_ON, flip);
}
#ifndef SC_NO_CUTPASTE
static void
gfb_mouse(scr_stat *scp, int x, int y, int on)
{
#ifdef __sparc64__
vidd_putm(scp->sc->adp, x, y, mouse_pointer,
on ? 0xffffffff : 0x0, 22, 12);
#else
if (on) {
vidd_putm(scp->sc->adp, x, y, mouse_pointer,
0xffffffff, 16, 8);
} else {
/* XXX: removal is incomplete for h/w cursors and borders. */
}
#endif
}
#endif /* SC_NO_CUTPASTE */
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