NetBSD-5.0.2/usr.sbin/tpctl/fb.c
/* $NetBSD: fb.c,v 1.4 2008/05/10 15:31:05 martin Exp $ */
/*-
* Copyright (c) 2002 TAKEMRUA Shin
* 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. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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 <string.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/fcntl.h>
#include <sys/mman.h>
#include "tpctl.h"
#ifndef lint
#include <sys/cdefs.h>
__RCSID("$NetBSD: fb.c,v 1.4 2008/05/10 15:31:05 martin Exp $");
#endif /* not lint */
#define INVALID_CACHE -1
#define ALIGN(a, n) ((typeof(a))(((int)(a) + (n) - 1) / (n) * (n)))
#define ABS(a) ((a) < 0 ? -(a) : (a))
#define SWAP(a, b) do { \
typeof(a) tmp; \
tmp = (a); (a) = (b); (b) = tmp; \
} while(0)
#define bitsizeof(t) (sizeof(t) * 8)
int
fb_dispmode(struct fb *fb, int dispmode)
{
if (fb->dispmode != dispmode) {
if (ioctl(fb->fd, WSDISPLAYIO_SMODE, &dispmode) < 0)
return (-1);
fb->dispmode = dispmode;
}
return (0);
}
int
fb_init(struct fb *fb, int fd)
{
int y;
size_t size;
fb->fd = fd;
fb->linecache_y = INVALID_CACHE;
fb->conf.hf_conf_index = HPCFB_CURRENT_CONFIG;
if (ioctl(fb->fd, WSDISPLAYIO_GMODE, &fb->dispmode) < 0)
return (-1);
if (ioctl(fb->fd, HPCFBIO_GCONF, &fb->conf) < 0)
return (-1);
if (fb_dispmode(fb, WSDISPLAYIO_MODE_MAPPED) < 0)
return (-1);
size = (size_t)fb->conf.hf_bytes_per_line * fb->conf.hf_height;
size += fb->conf.hf_offset;
size = ALIGN(size, getpagesize());
fb->baseaddr = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd,0);
if (fb->baseaddr == MAP_FAILED)
return (-1);
fb->baseaddr += fb->conf.hf_offset;
size = ALIGN(fb->conf.hf_bytes_per_line, 16);
fb->linecache = (fb_pixel_t*)malloc(size);
if (fb->linecache == NULL)
return (-1);
fb->workbuf = (fb_pixel_t*)malloc(size);
if (fb->workbuf == NULL)
return (-1);
if (fb->conf.hf_access_flags & HPCFB_ACCESS_REVERSE) {
fb->white = 0;
fb->black = ~0;
} else {
fb->white = ~0;
fb->black = 0;
}
/*
* clear screen
*/
for (y = 0; y < fb->conf.hf_height; y++) {
fb_getline(fb, y);
memset(fb->linecache, fb->black,
ALIGN(fb->conf.hf_bytes_per_line, 16));
fb_putline(fb, y);
}
return (0);
}
static void
__fb_swap_workbuf(struct fb *fb)
{
int i, n;
n = ALIGN(fb->conf.hf_bytes_per_line, 16) / sizeof(fb_pixel_t);
if (fb->conf.hf_order_flags & HPCFB_REVORDER_BYTE) {
for (i = 0; i < n; i++)
fb->workbuf[i] =
((fb->workbuf[i] << 8) & 0xff00ff00) |
((fb->workbuf[i] >> 8) & 0x00ff00ff);
}
if (fb->conf.hf_order_flags & HPCFB_REVORDER_WORD) {
for (i = 0; i < n; i++)
fb->workbuf[i] =
((fb->workbuf[i] << 16) & 0xffff0000) |
((fb->workbuf[i] >> 16) & 0x0000ffff);
}
if (fb->conf.hf_order_flags & HPCFB_REVORDER_DWORD) {
for (i = 0; i < n; i += 2) {
fb_pixel_t tmp;
tmp = fb->workbuf[i];
fb->workbuf[i] = fb->workbuf[i + 1];
fb->workbuf[i + 1] = tmp;
}
}
if (fb->conf.hf_order_flags & HPCFB_REVORDER_QWORD) {
for (i = 0; i < n; i += 4) {
fb_pixel_t tmp;
tmp = fb->workbuf[i + 0];
fb->workbuf[i + 0] = fb->workbuf[i + 2];
fb->workbuf[i + 2] = tmp;
tmp = fb->workbuf[i + 1];
fb->workbuf[i + 1] = fb->workbuf[i + 3];
fb->workbuf[i + 3] = tmp;
}
}
}
static void
__fb_put_pixel(struct fb *fb, fb_pixel_t pixel, int width, int x)
{
fb_pixel_t mask = (1 << width) - 1;
x -= (bitsizeof(fb_pixel_t) - width);
if (x < 0) {
pixel <<= -x;
mask <<= -x;
fb->linecache[0] = (fb->linecache[0]&~mask) | (pixel&~mask);
} else {
fb_pixel_t *dst = &fb->linecache[x / bitsizeof(fb_pixel_t)];
x %= bitsizeof(fb_pixel_t);
*dst = (*dst & ~(mask>>x)) | ((pixel>>x) & (mask>>x));
dst++;
if (x == 0)
return;
x = bitsizeof(fb_pixel_t) - x;
*dst = (*dst & ~(mask<<x)) | ((pixel<<x) & (mask<<x));
}
}
void
fb_getline(struct fb *fb, int y)
{
int i, n;
unsigned char *src;
fb_pixel_t *dst;
src = fb->baseaddr + fb->conf.hf_bytes_per_line * y;
dst = fb->workbuf;
n = ALIGN(fb->conf.hf_bytes_per_line, 16) / sizeof(fb_pixel_t);
for (i = 0; i < n; i++) {
*dst++ = ((fb_pixel_t)src[0] << 24) |
((fb_pixel_t)src[1] << 16) |
((fb_pixel_t)src[2] << 8) |
((fb_pixel_t)src[3] << 0);
src += 4;
}
__fb_swap_workbuf(fb);
memcpy(fb->linecache, fb->workbuf, n * sizeof(fb_pixel_t));
}
void
fb_putline(struct fb *fb, int y)
{
int i, n;
unsigned char *dst;
fb_pixel_t *src;
src = fb->workbuf;
dst = fb->baseaddr + fb->conf.hf_bytes_per_line * y;
n = ALIGN(fb->conf.hf_bytes_per_line, 16) / sizeof(fb_pixel_t);
memcpy(fb->workbuf, fb->linecache, n * sizeof(fb_pixel_t));
__fb_swap_workbuf(fb);
for (i = 0; i < n; i++) {
*dst++ = (*src >> 24) & 0xff;
*dst++ = (*src >> 16) & 0xff;
*dst++ = (*src >> 8) & 0xff;
*dst++ = (*src >> 0) & 0xff;
src++;
}
}
void
fb_fetchline(struct fb *fb, int y)
{
if (fb->linecache_y == y)
return;
fb_getline(fb, y);
fb->linecache_y = y;
}
void
fb_flush(struct fb *fb)
{
if (fb->linecache_y != INVALID_CACHE)
fb_putline(fb, fb->linecache_y);
}
void
fb_drawpixel(struct fb *fb, int x, int y, fb_pixel_t pixel)
{
int pack;
if (fb->conf.hf_access_flags & HPCFB_ACCESS_Y_TO_X)
SWAP(x, y);
if (fb->conf.hf_access_flags & HPCFB_ACCESS_R_TO_L)
x = fb->conf.hf_width - x - 1;
if (fb->conf.hf_access_flags & HPCFB_ACCESS_B_TO_T)
y = fb->conf.hf_height - y - 1;
if (x < 0 || y < 0 || fb->conf.hf_width <= x || fb->conf.hf_height < y)
return;
pack = x / fb->conf.hf_pixels_per_pack;
x %= fb->conf.hf_pixels_per_pack;
if (fb->conf.hf_access_flags & HPCFB_ACCESS_LSB_TO_MSB)
x = fb->conf.hf_pixels_per_pack - x - 1;
x *= fb->conf.hf_pixel_width;
if (fb->conf.hf_access_flags & HPCFB_ACCESS_PACK_BLANK)
x += (fb->conf.hf_pack_width -
fb->conf.hf_pixel_width * fb->conf.hf_pixels_per_pack);
x += pack * fb->conf.hf_pack_width;
if (fb->linecache_y != y) {
fb_flush(fb);
fb_fetchline(fb, y);
}
__fb_put_pixel(fb, pixel, fb->conf.hf_pixel_width, x);
}
void
fb_drawline(struct fb *fb, int x0, int y0, int x1, int y1, fb_pixel_t pixel)
{
int i, dx, dy, d, incdec;
dx = ABS(x1 - x0);
dy = ABS(y1 - y0);
if (dx < dy) {
if (y1 < y0) {
SWAP(x0, x1);
SWAP(y0, y1);
}
if (x0 < x1)
incdec = 1;
else
incdec = -1;
d = -dy;
dx *= 2;
dy *= 2;
for (i = y0; i <= y1; i++) {
fb_drawpixel(fb, x0, i, pixel);
d += dx;
if (0 <= d) {
d -= dy;
x0 += incdec;
}
}
} else {
if (x1 < x0) {
SWAP(x0, x1);
SWAP(y0, y1);
}
if (y0 < y1)
incdec = 1;
else
incdec = -1;
d = -dx;
dx *= 2;
dy *= 2;
for (i = x0; i <= x1; i++) {
fb_drawpixel(fb, i, y0, pixel);
d += dy;
if (0 <= d) {
d -= dx;
y0 += incdec;
}
}
}
}