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

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/* $NetBSD: ite_cc.c,v 1.13 1997/07/15 06:48:05 leo Exp $ */
/*
* Copyright (c) 1996 Leo Weppelman
* Copyright (c) 1994 Christian E. Hopps
* 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 Christian E. Hopps.
* 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.
*/
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/proc.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/systm.h>
#include <sys/queue.h>
#include <sys/termios.h>
#include <sys/malloc.h>
#include <sys/device.h>
#include <dev/cons.h>
#include <machine/cpu.h>
#include <atari/atari/device.h>
#include <atari/dev/itevar.h>
#include <atari/dev/iteioctl.h>
#include <atari/dev/grfioctl.h>
#include <atari/dev/grfabs_reg.h>
#include <atari/dev/grfvar.h>
#include <atari/dev/font.h>
#include <atari/dev/viewioctl.h>
#include <atari/dev/viewvar.h>
#include "grfcc.h"
/*
* This is what ip->priv points to;
* it contains local variables for custom-chip ites.
*/
struct ite_priv {
u_char **row_ptr; /* array of pointers into the bitmap */
u_long row_bytes;
u_long cursor_opt;
u_short *column_offset; /* array of offsets for columns */
u_int row_offset; /* the row offset */
u_short width; /* the bitmap width */
u_short underline; /* where the underline goes */
u_short ft_x; /* the font width */
u_short ft_y; /* the font height */
u_char *font_cell[256];/* the font pointer */
};
typedef struct ite_priv ipriv_t;
/*
* We need the following space to get an ite-console setup before
* the VM-system is brought up. We setup for a 1280x960 monitor with
* an 8x8 font.
*/
#define CONS_MAXROW 120 /* Max. number of rows on console */
#define CONS_MAXCOL 160 /* Max. number of columns on console */
static u_short con_columns[CONS_MAXCOL];
static u_char *con_rows[CONS_MAXROW];
static ipriv_t con_ipriv;
extern font_info font_info_8x8;
extern font_info font_info_8x16;
static void view_init __P((struct ite_softc *));
static void view_deinit __P((struct ite_softc *));
static int itecc_ioctl __P((struct ite_softc *, u_long, caddr_t, int,
struct proc *));
static int ite_newsize __P((struct ite_softc *, struct itewinsize *));
static void cursor32 __P((struct ite_softc *, int));
static void putc8 __P((struct ite_softc *, int, int, int, int));
static void clear8 __P((struct ite_softc *, int, int, int, int));
static void scroll8 __P((struct ite_softc *, int, int, int, int));
static void scrollbmap __P((bmap_t *, u_short, u_short, u_short, u_short,
short, short));
/*
* Patchable
*/
int ite_default_x = 0; /* def leftedge offset */
int ite_default_y = 0; /* def topedge offset */
int ite_default_width = 640; /* def width */
int ite_default_depth = 1; /* def depth */
int ite_default_height = 400; /* def height */
/*
* grfcc config stuff
*/
void grfccattach __P((struct device *, struct device *, void *));
int grfccmatch __P((struct device *, struct cfdata *, void *));
int grfccprint __P((void *, const char *));
struct cfattach grfcc_ca = {
sizeof(struct grf_softc), grfccmatch, grfccattach
};
struct cfdriver grfcc_cd = {
NULL, "grfcc", DV_DULL
};
/*
* only used in console init.
*/
static struct cfdata *cfdata_grf = NULL;
/*
* Probe functions we can use:
*/
#ifdef TT_VIDEO
void tt_probe_video __P((MODES *));
#endif /* TT_VIDEO */
#ifdef FALCON_VIDEO
void falcon_probe_video __P((MODES *));
#endif /* FALCON_VIDEO */
int
grfccmatch(pdp, cfp, auxp)
struct device *pdp;
struct cfdata *cfp;
void *auxp;
{
static int must_probe = 1;
grf_auxp_t *grf_auxp = auxp;
if (must_probe) {
/*
* Check if the layers we depend on exist
*/
if (!(machineid & (ATARI_TT|ATARI_FALCON)))
return (0);
#ifdef TT_VIDEO
if ((machineid & ATARI_TT) && !grfabs_probe(&tt_probe_video))
return (0);
#endif /* TT_VIDEO */
#ifdef FALCON_VIDEO
if ((machineid & ATARI_FALCON)
&& !grfabs_probe(&falcon_probe_video))
return (0);
#endif /* FALCON_VIDEO */
viewprobe();
must_probe = 0;
}
if (atari_realconfig == 0) {
/*
* Early console init. Only match unit 0.
*/
if (cfp->cf_unit != 0)
return(0);
if (viewopen(0, 0, 0, NULL))
return(0);
cfdata_grf = cfp;
return (1);
}
/*
* Normal config. When we are called directly from the grfbus,
* we only match unit 0. The attach function will call us for
* the other configured units.
*/
if (grf_auxp->from_bus_match && (cfp->cf_unit != 0))
return (0);
if (!grf_auxp->from_bus_match && (grf_auxp->unit != cfp->cf_unit))
return (0);
/*
* Final constraint: each grf needs a view....
*/
if((cfdata_grf == NULL) || (cfp->cf_unit != 0)) {
if(viewopen(cfp->cf_unit, 0, 0, NULL))
return(0);
}
return(1);
}
/*
* attach: initialize the grf-structure and try to attach an ite to us.
* note : dp is NULL during early console init.
*/
void
grfccattach(pdp, dp, auxp)
struct device *pdp, *dp;
void *auxp;
{
static struct grf_softc congrf;
grf_auxp_t *grf_bus_auxp = auxp;
grf_auxp_t grf_auxp;
struct grf_softc *gp;
int maj;
/*
* find our major device number
*/
for(maj = 0; maj < nchrdev; maj++)
if (cdevsw[maj].d_open == grfopen)
break;
/*
* Handle exeption case: early console init
*/
if(dp == NULL) {
congrf.g_unit = 0;
congrf.g_itedev = (dev_t)-1;
congrf.g_grfdev = makedev(maj, 0);
congrf.g_flags = GF_ALIVE;
congrf.g_mode = grf_mode;
congrf.g_conpri = grfcc_cnprobe();
congrf.g_viewdev = congrf.g_unit;
grfcc_iteinit(&congrf);
grf_viewsync(&congrf);
/* Attach console ite */
atari_config_found(cfdata_grf, NULL, &congrf, grfccprint);
return;
}
gp = (struct grf_softc *)dp;
gp->g_unit = gp->g_device.dv_unit;
grfsp[gp->g_unit] = gp;
if((cfdata_grf != NULL) && (gp->g_unit == 0)) {
/*
* We inited earlier just copy the info, take care
* not to copy the device struct though.
*/
bcopy(&congrf.g_display, &gp->g_display,
(char *)&gp[1] - (char *)&gp->g_display);
}
else {
gp->g_grfdev = makedev(maj, gp->g_unit);
gp->g_itedev = (dev_t)-1;
gp->g_flags = GF_ALIVE;
gp->g_mode = grf_mode;
gp->g_conpri = 0;
gp->g_viewdev = gp->g_unit;
grfcc_iteinit(gp);
grf_viewsync(gp);
}
printf(": width %d height %d", gp->g_display.gd_dwidth,
gp->g_display.gd_dheight);
if(gp->g_display.gd_colors == 2)
printf(" monochrome\n");
else printf(" colors %d\n", gp->g_display.gd_colors);
/*
* try and attach an ite
*/
config_found(dp, gp, grfccprint);
/*
* If attaching unit 0, go ahead and 'find' the rest of us
*/
if (gp->g_unit == 0) {
grf_auxp.from_bus_match = 0;
for (grf_auxp.unit=1; grf_auxp.unit < NGRFCC; grf_auxp.unit++) {
config_found(pdp, (void*)&grf_auxp, grf_bus_auxp->busprint);
}
}
}
int
grfccprint(auxp, pnp)
void *auxp;
const char *pnp;
{
if(pnp)
printf("ite at %s", pnp);
return(UNCONF);
}
/*
* called from grf_cc to return console priority
*/
int
grfcc_cnprobe()
{
return(CN_INTERNAL);
}
/*
* called from grf_cc to init ite portion of
* grf_softc struct
*/
void
grfcc_iteinit(gp)
struct grf_softc *gp;
{
gp->g_itecursor = cursor32;
gp->g_iteputc = putc8;
gp->g_iteclear = clear8;
gp->g_itescroll = scroll8;
gp->g_iteinit = view_init;
gp->g_itedeinit = view_deinit;
}
static void
view_deinit(ip)
struct ite_softc *ip;
{
ip->flags &= ~ITE_INITED;
}
static void
view_init(ip)
register struct ite_softc *ip;
{
struct itewinsize wsz;
ipriv_t *cci;
if((cci = ip->priv) != NULL)
return;
ip->itexx_ioctl = itecc_ioctl;
#if defined(KFONT_8X8)
ip->font = font_info_8x8;
#else
ip->font = font_info_8x16;
#endif
/* Find the correct set of rendering routines for this font. */
if(ip->font.width != 8)
panic("kernel font size not supported");
if(!atari_realconfig)
ip->priv = cci = &con_ipriv;
else ip->priv = cci = (ipriv_t*)malloc(sizeof(*cci), M_DEVBUF,M_WAITOK);
if(cci == NULL)
panic("No memory for ite-view");
bzero(cci, sizeof(*cci));
cci->cursor_opt = 0;
cci->row_ptr = NULL;
cci->column_offset = NULL;
wsz.x = ite_default_x;
wsz.y = ite_default_y;
wsz.width = ite_default_width;
wsz.height = ite_default_height;
wsz.depth = ite_default_depth;
ite_newsize (ip, &wsz);
/*
* Only console will be turned on by default..
*/
if(ip->flags & ITE_ISCONS)
ip->grf->g_mode(ip->grf, GM_GRFON, NULL, 0, 0);
}
static int
ite_newsize(ip, winsz)
struct ite_softc *ip;
struct itewinsize *winsz;
{
struct view_size vs;
ipriv_t *cci = ip->priv;
u_long i, j;
int error = 0;
view_t *view;
vs.x = winsz->x;
vs.y = winsz->y;
vs.width = winsz->width;
vs.height = winsz->height;
vs.depth = winsz->depth;
error = viewioctl(ip->grf->g_viewdev, VIOCSSIZE, (caddr_t)&vs, 0,
NOPROC);
view = viewview(ip->grf->g_viewdev);
/*
* Reinitialize our structs
*/
ip->cols = view->display.width / ip->font.width;
ip->rows = view->display.height / ip->font.height;
/*
* save new values so that future opens use them
* this may not be correct when we implement Virtual Consoles
*/
ite_default_height = view->display.height;
ite_default_width = view->display.width;
ite_default_x = view->display.x;
ite_default_y = view->display.y;
ite_default_depth = view->bitmap->depth;
if(cci->row_ptr && (cci->row_ptr != con_rows)) {
free(cci->row_ptr, M_DEVBUF);
cci->row_ptr = NULL;
}
if(cci->column_offset && (cci->column_offset != con_columns)) {
free(cci->column_offset, M_DEVBUF);
cci->column_offset = NULL;
}
if(!atari_realconfig) {
cci->row_ptr = con_rows;
cci->column_offset = con_columns;
}
else {
cci->row_ptr = malloc(sizeof(u_char *) * ip->rows,M_DEVBUF,M_NOWAIT);
cci->column_offset = malloc(sizeof(u_int)*ip->cols,M_DEVBUF,M_NOWAIT);
}
if(!cci->row_ptr || !cci->column_offset)
panic("No memory for ite-view");
cci->width = view->bitmap->bytes_per_row << 3;
cci->underline = ip->font.baseline + 1;
cci->row_offset = view->bitmap->bytes_per_row;
cci->ft_x = ip->font.width;
cci->ft_y = ip->font.height;
cci->row_bytes = cci->row_offset * cci->ft_y;
cci->row_ptr[0] = view->bitmap->plane;
for(i = 1; i < ip->rows; i++)
cci->row_ptr[i] = cci->row_ptr[i-1] + cci->row_bytes;
/*
* Initialize the column offsets to point at the correct location
* in the first plane. This definitely assumes a font width of 8!
*/
j = view->bitmap->depth * 2;
cci->column_offset[0] = 0;
for(i = 1; i < ip->cols; i++)
cci->column_offset[i] = ((i >> 1) * j) + (i & 1);
/* initialize the font cell pointers */
cci->font_cell[ip->font.font_lo] = ip->font.font_p;
for(i = ip->font.font_lo+1; i <= ip->font.font_hi; i++)
cci->font_cell[i] = cci->font_cell[i-1] + ip->font.height;
return(error);
}
int
itecc_ioctl(ip, cmd, addr, flag, p)
struct ite_softc *ip;
u_long cmd;
caddr_t addr;
int flag;
struct proc *p;
{
struct winsize ws;
struct itewinsize *is;
int error = 0;
view_t *view = viewview(ip->grf->g_viewdev);
switch (cmd) {
case ITEIOCSWINSZ:
is = (struct itewinsize *)addr;
if(ite_newsize(ip, is))
error = ENOMEM;
else {
view = viewview(ip->grf->g_viewdev);
ws.ws_row = ip->rows;
ws.ws_col = ip->cols;
ws.ws_xpixel = view->display.width;
ws.ws_ypixel = view->display.height;
ite_reset(ip);
/*
* XXX tell tty about the change
* XXX this is messy, but works
*/
iteioctl(ip->grf->g_itedev,TIOCSWINSZ,(caddr_t)&ws,0,p);
}
break;
case VIOCSCMAP:
case VIOCGCMAP:
/*
* XXX watchout for that NOPROC. its not really the kernel
* XXX talking these two commands don't use the proc pointer
* XXX though.
*/
error = viewioctl(ip->grf->g_viewdev, cmd, addr, flag, NOPROC);
break;
default:
error = -1;
break;
}
return (error);
}
static void
cursor32(struct ite_softc *ip, int flag)
{
int cend;
u_char *pl;
ipriv_t *cci;
cci = ip->priv;
if(flag == END_CURSOROPT)
cci->cursor_opt--;
else if(flag == START_CURSOROPT) {
if(!cci->cursor_opt)
cursor32(ip, ERASE_CURSOR);
cci->cursor_opt++;
return; /* if we are already opted. */
}
if(cci->cursor_opt)
return; /* if we are still nested. */
/* else we draw the cursor. */
if(flag != DRAW_CURSOR && flag != END_CURSOROPT) {
/*
* erase the cursor
*/
cend = ip->font.height-1;
pl = cci->column_offset[ip->cursorx]
+ cci->row_ptr[ip->cursory];
__asm__ __volatile__
("1: notb %0@ ; addaw %4,%0\n\t"
"dbra %1,1b"
: "=a" (pl), "=d" (cend)
: "0" (pl), "1" (cend),
"d" (cci->row_offset)
);
}
if(flag != DRAW_CURSOR && flag != MOVE_CURSOR && flag != END_CURSOROPT)
return;
/*
* draw the cursor
*/
cend = min(ip->curx, ip->cols-1);
if (flag == DRAW_CURSOR
&& ip->cursorx == cend && ip->cursory == ip->cury)
return;
ip->cursorx = cend;
ip->cursory = ip->cury;
cend = ip->font.height-1;
pl = cci->column_offset[ip->cursorx]
+ cci->row_ptr[ip->cursory];
__asm__ __volatile__
("1: notb %0@ ; addaw %4,%0\n\t"
"dbra %1,1b"
: "=a" (pl), "=d" (cend)
: "0" (pl), "1" (cend),
"d" (cci->row_offset)
);
}
static void
putc8(struct ite_softc *ip, int c, int dy, int dx, int mode)
{
register ipriv_t *cci = (ipriv_t *)ip->priv;
register u_char *pl = cci->column_offset[dx] + cci->row_ptr[dy];
register u_int fh = cci->ft_y;
register u_int ro = cci->row_offset;
register u_char eor_mask;
register u_char bl, tmp, ul;
register u_char *ft;
if(c < ip->font.font_lo || c > ip->font.font_hi)
return;
ft = cci->font_cell[c];
if(!mode) {
while(fh--) {
*pl = *ft++; pl += ro;
}
return;
}
eor_mask = (mode & ATTR_INV) ? 0xff : 0x00;
bl = (mode & ATTR_BOLD) ? 1 : 0;
ul = (mode & ATTR_UL) ? fh - cci->underline : fh;
for(; fh--; pl += ro) {
if(fh != ul) {
tmp = *ft++;
if(bl)
tmp |= (tmp >> 1);
*pl = tmp ^ eor_mask;
}
else {
*pl = 0xff ^ eor_mask;
ft++;
}
}
}
static void
clear8(struct ite_softc *ip, int sy, int sx, int h, int w)
{
ipriv_t *cci = (ipriv_t *) ip->priv;
view_t *v = viewview(ip->grf->g_viewdev);
bmap_t *bm = v->bitmap;
if((sx == 0) && (w == ip->cols)) {
/* common case: clearing whole lines */
while (h--) {
int i;
u_char *ptr = cci->row_ptr[sy];
for(i = 0; i < ip->font.height; i++) {
bzero(ptr, bm->bytes_per_row);
ptr += bm->bytes_per_row;
}
sy++;
}
}
else {
/*
* clearing only part of a line
* XXX could be optimized MUCH better, but is it worth the
* trouble?
*/
int i;
u_char *pls, *ple;
pls = cci->row_ptr[sy];
ple = pls + cci->column_offset[sx + w-1];
pls = pls + cci->column_offset[sx];
for(i = ((ip->font.height) * h)-1; i >= 0; i--) {
u_char *p = pls;
while(p <= ple)
*p++ = 0;
pls += bm->bytes_per_row;
ple += bm->bytes_per_row;
}
}
}
/* Note: sx is only relevant for SCROLL_LEFT or SCROLL_RIGHT. */
static void
scroll8(ip, sy, sx, count, dir)
register struct ite_softc *ip;
register int sy;
int dir, sx, count;
{
bmap_t *bm = viewview(ip->grf->g_viewdev)->bitmap;
u_char *pl = ((ipriv_t *)ip->priv)->row_ptr[sy];
if(dir == SCROLL_UP) {
int dy = sy - count;
cursor32(ip, ERASE_CURSOR);
scrollbmap(bm, 0, dy*ip->font.height, bm->bytes_per_row >> 3,
(ip->bottom_margin-dy+1)*ip->font.height,
0, -(count*ip->font.height));
}
else if(dir == SCROLL_DOWN) {
cursor32(ip, ERASE_CURSOR);
scrollbmap(bm, 0, sy*ip->font.height, bm->bytes_per_row >> 3,
(ip->bottom_margin-sy+1)*ip->font.height,
0, count*ip->font.height);
}
else if(dir == SCROLL_RIGHT) {
int sofs = (ip->cols - count) * ip->font.width;
int dofs = (ip->cols) * ip->font.width;
int i, j;
cursor32(ip, ERASE_CURSOR);
for(j = ip->font.height-1; j >= 0; j--) {
int sofs2 = sofs, dofs2 = dofs;
for (i = (ip->cols - (sx + count))-1; i >= 0; i--) {
int t;
sofs2 -= ip->font.width;
dofs2 -= ip->font.width;
asm("bfextu %1@{%2:%3},%0" : "=d" (t)
: "a" (pl), "d" (sofs2), "d" (ip->font.width));
asm("bfins %3,%0@{%1:%2}" :
: "a" (pl), "d" (dofs2), "d" (ip->font.width),
"d" (t));
}
pl += bm->bytes_per_row;
}
}
else { /* SCROLL_LEFT */
int sofs = (sx) * ip->font.width;
int dofs = (sx - count) * ip->font.width;
int i, j;
cursor32(ip, ERASE_CURSOR);
for(j = ip->font.height-1; j >= 0; j--) {
int sofs2 = sofs, dofs2 = dofs;
for(i = (ip->cols - sx)-1; i >= 0; i--) {
int t;
asm("bfextu %1@{%2:%3},%0" : "=d" (t)
: "a" (pl), "d" (sofs2), "d" (ip->font.width));
asm("bfins %3,%0@{%1:%2}"
: : "a" (pl), "d" (dofs2),"d" (ip->font.width),
"d" (t));
sofs2 += ip->font.width;
dofs2 += ip->font.width;
}
pl += bm->bytes_per_row;
}
}
}
static void
scrollbmap (bmap_t *bm, u_short x, u_short y, u_short width, u_short height, short dx, short dy)
{
u_short lwpr = bm->bytes_per_row >> 2;
if(dx) {
/* FIX: */ panic ("delta x not supported in scroll bitmap yet.");
}
if(dy == 0) {
return;
}
if(dy > 0) {
u_long *pl = (u_long *)bm->plane;
u_long *src_y = pl + (lwpr*y);
u_long *dest_y = pl + (lwpr*(y+dy));
u_long count = lwpr*(height-dy);
u_long *clr_y = src_y;
u_long clr_count = dest_y - src_y;
u_long bc, cbc;
src_y += count - 1;
dest_y += count - 1;
bc = count >> 4;
count &= 0xf;
while (bc--) {
*dest_y-- = *src_y--; *dest_y-- = *src_y--;
*dest_y-- = *src_y--; *dest_y-- = *src_y--;
*dest_y-- = *src_y--; *dest_y-- = *src_y--;
*dest_y-- = *src_y--; *dest_y-- = *src_y--;
*dest_y-- = *src_y--; *dest_y-- = *src_y--;
*dest_y-- = *src_y--; *dest_y-- = *src_y--;
*dest_y-- = *src_y--; *dest_y-- = *src_y--;
*dest_y-- = *src_y--; *dest_y-- = *src_y--;
}
while (count--)
*dest_y-- = *src_y--;
cbc = clr_count >> 4;
clr_count &= 0xf;
while (cbc--) {
*clr_y++ = 0; *clr_y++ = 0; *clr_y++ = 0; *clr_y++ = 0;
*clr_y++ = 0; *clr_y++ = 0; *clr_y++ = 0; *clr_y++ = 0;
*clr_y++ = 0; *clr_y++ = 0; *clr_y++ = 0; *clr_y++ = 0;
*clr_y++ = 0; *clr_y++ = 0; *clr_y++ = 0; *clr_y++ = 0;
}
while(clr_count--)
*clr_y++ = 0;
}
else {
u_long *pl = (u_long *)bm->plane;
u_long *src_y = pl + (lwpr*(y-dy));
u_long *dest_y = pl + (lwpr*y);
long count = lwpr*(height + dy);
u_long *clr_y = dest_y + count;
u_long clr_count = src_y - dest_y;
u_long bc, cbc;
bc = count >> 4;
count &= 0xf;
while(bc--) {
*dest_y++ = *src_y++; *dest_y++ = *src_y++;
*dest_y++ = *src_y++; *dest_y++ = *src_y++;
*dest_y++ = *src_y++; *dest_y++ = *src_y++;
*dest_y++ = *src_y++; *dest_y++ = *src_y++;
*dest_y++ = *src_y++; *dest_y++ = *src_y++;
*dest_y++ = *src_y++; *dest_y++ = *src_y++;
*dest_y++ = *src_y++; *dest_y++ = *src_y++;
*dest_y++ = *src_y++; *dest_y++ = *src_y++;
}
while(count--)
*dest_y++ = *src_y++;
cbc = clr_count >> 4;
clr_count &= 0xf;
while (cbc--) {
*clr_y++ = 0; *clr_y++ = 0; *clr_y++ = 0; *clr_y++ = 0;
*clr_y++ = 0; *clr_y++ = 0; *clr_y++ = 0; *clr_y++ = 0;
*clr_y++ = 0; *clr_y++ = 0; *clr_y++ = 0; *clr_y++ = 0;
*clr_y++ = 0; *clr_y++ = 0; *clr_y++ = 0; *clr_y++ = 0;
}
while (clr_count--)
*clr_y++ = 0;
}
}
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