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freebsd/sys/dev/syscons/scgfbrndr.c
David E. O'Brien 2a200695e4 Add the TGA video driver. This is a great accomplishtment and will help 
us a lot on older Alphas.
Andrew Gallatin, Thomas V. Crimi, and Peter Jeremy contributed to this
work along with the submitter.

Submitted by:	 Andrew M. Miklic <miklic@home.com>
2001-11-01 08:26:30 +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"
#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 = {
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 = {
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_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
static u_char mouse_pointer[16] = {
0x00, 0x40, 0x60, 0x70, 0x78, 0x7c, 0x7e, 0x68,
0x0c, 0x0c, 0x06, 0x06, 0x00, 0x00, 0x00, 0x00
};
#endif
static void
gfb_nop(scr_stat *scp, ...)
{
}
/* text mode renderer */
static void
gfb_clear(scr_stat *scp, int c, int attr)
{
(*vidsw[scp->sc->adapter]->clear)(scp->sc->adp);
}
static void
gfb_border(scr_stat *scp, int color)
{
(*vidsw[scp->sc->adapter]->set_border)(scp->sc->adp, color);
}
static void
gfb_draw(scr_stat *scp, int from, int count, int flip)
{
char c;
char 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... */
(*vidsw[scp->sc->adapter]->copy)(adp, n, 0, n);
#ifdef 0
(*vidsw[scp->sc->adapter]->clear)(adp, n);
#endif
/* Display new text rows... */
(*vidsw[scp->sc->adapter]->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;
(*vidsw[scp->sc->adapter]->putc)(adp, from, c,
a);
}
else {
(*vidsw[scp->sc->adapter]->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
(*vidsw[scp->sc->adapter]->set_hw_cursor_shape)(scp->sc->adp,
base, height, scp->font_size, blink);
}
static int pxlblinkrate = 0;
#ifdef 0
static void
gfb_cursor(scr_stat *scp, int at, int blink, int on, int flip)
{
video_adapter_t *adp;
if (scp->cursor_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;
(*vidsw[adp->va_index]->set_hw_cursor)(adp,
at%scp->xsize,
at/scp->xsize);
} else {
if (scp->status & VR_CURSOR_ON)
(*vidsw[adp->va_index]->set_hw_cursor)(adp, -1,
-1);
scp->status &= ~VR_CURSOR_ON;
}
} else {
scp->status &= ~VR_CURSOR_BLINK;
if(on) {
scp->status |= VR_CURSOR_ON;
scp->cursor_saveunder_char = sc_vtb_getc(&scp->scr, at);
scp->cursor_saveunder_attr = sc_vtb_geta(&scp->scr, at);
(*vidsw[scp->sc->adapter]->putc)(scp->sc->adp, at,
scp->cursor_saveunder_char,
scp->cursor_saveunder_attr);
} else {
if (scp->status & VR_CURSOR_ON)
(*vidsw[scp->sc->adapter]->putc)(scp->sc->adp,
at, scp->cursor_saveunder_char,
scp->cursor_saveunder_attr);
scp->status &= ~VR_CURSOR_ON;
}
}
}
#endif
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->cursor_height <= 0) /* the text cursor is disabled */
return;
if (on) {
if (!blink) {
scp->status |= VR_CURSOR_ON;
(*vidsw[adp->va_index]->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)
(*vidsw[adp->va_index]->set_hw_cursor)(adp,
at%scp->xsize, at/scp->xsize);
else
(*vidsw[adp->va_index]->set_hw_cursor)(adp, -1,
-1);
}
} else {
if (scp->status & VR_CURSOR_ON)
(*vidsw[adp->va_index]->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;
}
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)
{
int i, pos;
if (on) {
/* Display the mouse pointer image... */
(*vidsw[scp->sc->adapter]->putm)(scp->sc->adp, x, y,
mouse_pointer, 0xffffffff, 16);
} else {
/*
Erase the mouse cursor image by redrawing the text
underneath it...
*/
return;
pos = x*scp->xsize + y;
i = (y < scp->xsize - 1) ? 2 : 1;
(*scp->rndr->draw)(scp, pos, i, FALSE);
if (x < scp->ysize - 1)
(*scp->rndr->draw)(scp, pos + scp->xsize, i, FALSE);
}
}
#endif /* SC_NO_CUTPASTE */
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