NetBSD/sys/arch/atari/dev/grfabs.c

520 lines
12 KiB
C

/* $NetBSD: grfabs.c,v 1.4 1995/05/21 10:54:44 leo Exp $ */
/*
* Copyright (c) 1995 Leo Weppelman.
* 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.
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Leo Weppelman.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*
* atari abstract graphics driver.
*/
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/malloc.h>
#include <machine/iomap.h>
#include <machine/video.h>
#include <machine/mfp.h>
#include <atari/dev/grfabs_reg.h>
/*
* Function decls
*/
static dmode_t *get_best_display_mode __P((dimen_t *, int, dmode_t *));
static view_t *alloc_view __P((dmode_t *, dimen_t *, u_char));
static void init_view __P((view_t *, bmap_t *, dmode_t *, box_t *));
static bmap_t *alloc_bitmap __P((u_long, u_long, u_char));
static void free_bitmap __P((bmap_t *));
static colormap_t *alloc_colormap __P((dmode_t *));
/*
* Ugh.. Stuff needed to allocate console structures before the VM-system
* is running. There is no malloc() available at that time.
*/
extern int atari_realconfig; /* 0 -> no malloc */
static view_t con_view;
static colormap_t con_cmap;
static long con_colors[MAX_CENTRIES];
/*
* List of available graphic modes
*/
static LIST_HEAD(modelist, display_mode) modes;
static dmode_t vid_modes[] = {
{ { NULL, NULL }, "sthigh", { 640, 400 }, 1, RES_STHIGH },
{ { NULL, NULL }, "tthigh", { 1280, 960 }, 1, RES_TTHIGH },
{ { NULL, NULL }, "stmid", { 640, 200 }, 2, RES_STMID },
{ { NULL, NULL }, "stlow", { 320, 200 }, 4, RES_STLOW },
{ { NULL, NULL }, "ttmid", { 640, 480 }, 4, RES_TTMID },
{ { NULL, NULL }, "ttlow", { 320, 480 }, 8, RES_TTLOW },
{ { NULL, NULL }, NULL, }
};
/*
* Default colors.....
* Currently the TT-low (256 colors) just uses 16 time the 16-color default.
* If you have a sensible 256 scale, feel free to add.....
* The first 2 colors in all maps are {black,white}, so ite (text) displays
* are initially readable. Also, this enables me to supply only 1 map. The
* 4 color mode uses the first four entries of the 16 color mode thus giving
* a gray scale display. (Maybe we can add an intensity bit to the ite...)
*/
static u_short def_color16[16] = {
0x000, /* black */
0xfff, /* white */
0xccc, /* light gray */
0x888, /* gray */
0x00c, /* blue */
0x0c0, /* green */
0x0cc, /* cyan */
0xc00, /* red */
0xc0c, /* magenta */
0xcc0, /* brown */
0x00f, /* light blue */
0x0f0, /* light green */
0x0ff, /* light cyan */
0xf00, /* light red */
0xf0f, /* light magenta */
0xff0 /* light brown */
};
/*
* XXX: called from ite console init routine.
* Initialize list of posible video modes.
*/
int
grfabs_probe()
{
dmode_t *dm;
int i;
int has_mono;
static int inited = 0;
if(inited)
return(1); /* Has to be done only once */
inited++;
/*
* First find out what kind of monitor is attached. Dma-sound
* should be off because the 'sound-done' and 'monochrome-detect'
* are xor-ed together. I think that shutting it down here is the
* wrong place.
*/
has_mono = (MFP->mf_gpip & IA_MONO) == 0;
LIST_INIT(&modes);
for(i = 0; (dm = &vid_modes[i])->name != NULL; i++) {
if(has_mono && (dm->vm_reg != RES_TTHIGH))
continue;
if(!has_mono && (dm->vm_reg == RES_TTHIGH))
continue;
LIST_INSERT_HEAD(&modes, dm, link);
}
/*
* This seems to prevent bordered screens.
*/
for(i=0; i < 16; i++)
VIDEO->vd_tt_rgb[i] = def_color16[i];
return(1);
}
view_t *
grf_alloc_view(d, dim, depth)
dmode_t *d;
dimen_t *dim;
u_char depth;
{
if(!d)
d = get_best_display_mode(dim, depth, NULL);
if(d)
return(alloc_view(d, dim, depth));
return(NULL);
}
dmode_t *
grf_get_best_mode(dim, depth)
dimen_t *dim;
u_char depth;
{
return(get_best_display_mode(dim, depth, NULL));
}
void grf_display_view(v)
view_t *v;
{
dmode_t *dm = v->mode;
bmap_t *bm = v->bitmap;
if(dm->current_view) {
/*
* Mark current view for this mode as no longer displayed
*/
dm->current_view->flags &= ~VF_DISPLAY;
}
dm->current_view = v;
v->flags |= VF_DISPLAY;
grf_use_colormap(v, v->colormap);
/* XXX: should use vbl for this */
VIDEO->vd_tt_res = dm->vm_reg;
VIDEO->vd_raml = (u_long)bm->hw_address & 0xff;
VIDEO->vd_ramm = ((u_long)bm->hw_address >> 8) & 0xff;
VIDEO->vd_ramh = ((u_long)bm->hw_address >> 16) & 0xff;
}
void grf_remove_view(v)
view_t *v;
{
dmode_t *mode = v->mode;
if(mode->current_view == v) {
#if 0
if(v->flags & VF_DISPLAY)
panic("Cannot shutdown display\n"); /* XXX */
#endif
mode->current_view = NULL;
}
v->flags &= ~VF_DISPLAY;
}
void grf_free_view(v)
view_t *v;
{
if(v) {
dmode_t *md = v->mode;
grf_remove_view(v);
if(v->colormap != &con_cmap)
free(v->colormap, M_DEVBUF);
free_bitmap(v->bitmap);
if(v != &con_view)
free(v, M_DEVBUF);
}
}
int
grf_get_colormap(v, cm)
view_t *v;
colormap_t *cm;
{
colormap_t *gcm;
int i, n;
u_long *sv_entry;
gcm = v->colormap;
n = cm->size < gcm->size ? cm->size : gcm->size;
/*
* Copy struct from view but be carefull to keep 'entry'
*/
sv_entry = cm->entry;
*cm = *gcm;
cm->entry = sv_entry;
/*
* Copy the colors
*/
bzero(cm->entry, cm->size * sizeof(long));
for(i = 0; i < n; i++)
cm->entry[i] = gcm->entry[i];
return(0);
}
int
grf_use_colormap(v, cm)
view_t *v;
colormap_t *cm;
{
dmode_t *dm;
volatile u_short *creg;
u_long *src;
colormap_t *vcm;
u_long *vcreg;
u_short ncreg;
int i;
dm = v->mode;
vcm = v->colormap;
/*
* I guess it seems reasonable to require the maps to be
* of the same type...
*/
if(cm->type != vcm->type)
return(EINVAL);
/*
* First figure out where the actual colormap resides and
* howmany colors are in it.
*/
switch(dm->vm_reg) {
case RES_STLOW:
creg = &VIDEO->vd_tt_rgb[0];
ncreg = 16;
break;
case RES_STMID:
creg = &VIDEO->vd_tt_rgb[0];
ncreg = 4;
break;
case RES_STHIGH:
creg = &VIDEO->vd_tt_rgb[254];
ncreg = 2;
break;
case RES_TTLOW:
creg = &VIDEO->vd_tt_rgb[0];
ncreg = 256;
break;
case RES_TTMID:
creg = &VIDEO->vd_tt_rgb[0];
ncreg = 16;
break;
case RES_TTHIGH:
return(0); /* No colors */
default:
panic("grf_get_colormap: wrong mode!?");
}
/* If first entry specified beyond capabilities -> error */
if(cm->first >= ncreg)
return(EINVAL);
/*
* A little tricky, the actual colormap pointer will be NULL
* when view is not displaying, valid otherwise.
*/
if(v->flags & VF_DISPLAY)
creg = &creg[cm->first];
else creg = NULL;
vcreg = &vcm->entry[cm->first];
ncreg -= cm->first;
if(cm->size > ncreg)
return(EINVAL);
ncreg = cm->size;
for(i = 0, src = cm->entry; i < ncreg; i++, vcreg++) {
*vcreg = *src++;
/*
* If displaying, also update actual color register.
*/
if(creg != NULL)
*creg++ = CM_LTOW(*vcreg);
}
return(0);
}
static dmode_t *
get_best_display_mode(dim, depth, curr_mode)
int depth;
dimen_t *dim;
dmode_t *curr_mode;
{
dmode_t *save;
dmode_t *dm;
long dt, dx, dy, ct;
save = NULL;
dm = modes.lh_first;
while(dm != NULL) {
dx = abs(dm->size.width - dim->width);
dy = abs(dm->size.height - dim->height);
ct = dx + dy;
if (ct < dt || save == NULL) {
save = dm;
dt = ct;
}
dm = dm->link.le_next;
}
/*
* Did we do better than the current mode?
*/
if((save != NULL) && (curr_mode != NULL)) {
dx = abs(curr_mode->size.width - dim->width);
dy = abs(curr_mode->size.height - dim->height);
ct = dx + dy;
if(ct <= dt)
return(NULL);
}
return (save);
}
static view_t *
alloc_view(mode, dim, depth)
dmode_t *mode;
dimen_t *dim;
u_char depth;
{
view_t *v;
bmap_t *bm;
if(!atari_realconfig)
v = &con_view;
else v = malloc(sizeof(*v), M_DEVBUF, M_NOWAIT);
if(v == NULL)
return(NULL);
bm = alloc_bitmap(mode->size.width, mode->size.height, mode->depth);
if(bm) {
box_t box;
v->colormap = alloc_colormap(mode);
if(v->colormap) {
INIT_BOX(&box,0,0,mode->size.width,mode->size.height);
init_view(v, bm, mode, &box);
return(v);
}
free_bitmap(bm);
}
if(v != &con_view)
free(v, M_DEVBUF);
return (NULL);
}
static void
init_view(v, bm, mode, dbox)
view_t *v;
bmap_t *bm;
dmode_t *mode;
box_t *dbox;
{
v->bitmap = bm;
v->mode = mode;
v->flags = 0;
bcopy(dbox, &v->display, sizeof(box_t));
}
/* bitmap functions */
static bmap_t *
alloc_bitmap(width, height, depth)
u_long width, height;
u_char depth;
{
int i;
u_long total_size, bm_size;
void *hw_address;
bmap_t *bm;
/*
* Sigh, it seems for mapping to work we need the bitplane data to
* 1: be aligned on a page boundry.
* 2: be n pages large.
*
* why? because the user gets a page aligned address, if this is before
* your allocation, too bad. Also it seems that the mapping routines
* do not watch to closely to the allowable length. so if you go over
* n pages by less than another page, the user gets to write all over
* the entire page. Since you did not allocate up to a page boundry
* (or more) the user writes into someone elses memory. -ch
*/
bm_size = atari_round_page((width * height * depth) / NBBY);
total_size = bm_size + sizeof(bmap_t) + NBPG;
if((bm = (bmap_t*)alloc_stmem(total_size, &hw_address)) == NULL)
return(NULL);
bm->plane = (u_char*)bm + sizeof(bmap_t);
bm->plane = (u_char*)atari_round_page(bm->plane);
bm->hw_address = (u_char*)hw_address + sizeof(bmap_t);
bm->hw_address = (u_char*)atari_round_page(bm->hw_address);
bm->bytes_per_row = (width * depth) / NBBY;
bm->rows = height;
bm->depth = depth;
bzero(bm->plane, bm_size);
return(bm);
}
static void
free_bitmap(bm)
bmap_t *bm;
{
if(bm)
free_stmem(bm);
}
static colormap_t *
alloc_colormap(dm)
dmode_t *dm;
{
int nentries, i;
colormap_t *cm;
u_char type = CM_COLOR;
switch(dm->vm_reg) {
case RES_STLOW:
case RES_TTMID:
nentries = 16;
break;
case RES_STMID:
nentries = 4;
break;
case RES_STHIGH:
nentries = 2;
break;
case RES_TTLOW:
nentries = 256;
break;
case RES_TTHIGH:
type = CM_MONO;
nentries = 0;
break;
default:
panic("grf:alloc_colormap: wrong mode!?");
}
if(!atari_realconfig) {
cm = &con_cmap;
cm->entry = con_colors;
}
else {
int size;
size = sizeof(*cm) + (nentries * sizeof(cm->entry[0]));
cm = malloc(size, M_DEVBUF, M_NOWAIT);
if(cm == NULL)
return(NULL);
cm->entry = (long *)&cm[1];
}
if((cm->type = type) == CM_COLOR)
cm->red_mask = cm->green_mask = cm->blue_mask = 0xf;
cm->first = 0;
cm->size = nentries;
for(i = 0; i < nentries; i++) {
register short val = def_color16[i % 16];
cm->entry[i] = CM_WTOL(val);
}
return(cm);
}