325 lines
7.9 KiB
C
325 lines
7.9 KiB
C
/* $NetBSD: fb.c,v 1.2 2003/07/08 23:33:50 uwe Exp $ */
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/*-
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* Copyright (c) 2002 TAKEMRUA Shin
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <string.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <sys/ioctl.h>
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#include <sys/fcntl.h>
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#include <sys/mman.h>
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#include "tpctl.h"
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#ifndef lint
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: fb.c,v 1.2 2003/07/08 23:33:50 uwe Exp $");
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#endif /* not lint */
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#define INVALID_CACHE -1
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#define ALIGN(a, n) ((typeof(a))(((int)(a) + (n) - 1) / (n) * (n)))
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#define ABS(a) ((a) < 0 ? -(a) : (a))
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#define SWAP(a, b) do { \
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typeof(a) tmp; \
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tmp = (a); (a) = (b); (b) = tmp; \
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} while(0)
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#define bitsizeof(t) (sizeof(t) * 8)
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int
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fb_dispmode(struct fb *fb, int dispmode)
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{
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if (fb->dispmode != dispmode) {
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if (ioctl(fb->fd, WSDISPLAYIO_SMODE, &dispmode) < 0)
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return (-1);
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fb->dispmode = dispmode;
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}
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return (0);
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}
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int
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fb_init(struct fb *fb, int fd)
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{
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int y;
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size_t size;
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fb->fd = fd;
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fb->linecache_y = INVALID_CACHE;
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fb->conf.hf_conf_index = HPCFB_CURRENT_CONFIG;
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if (ioctl(fb->fd, WSDISPLAYIO_GMODE, &fb->dispmode) < 0)
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return (-1);
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if (ioctl(fb->fd, HPCFBIO_GCONF, &fb->conf) < 0)
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return (-1);
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if (fb_dispmode(fb, WSDISPLAYIO_MODE_MAPPED) < 0)
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return (-1);
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size = (size_t)fb->conf.hf_bytes_per_line * fb->conf.hf_height;
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size += fb->conf.hf_offset;
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size = ALIGN(size, getpagesize());
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fb->baseaddr = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd,0);
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if (fb->baseaddr == MAP_FAILED)
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return (-1);
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fb->baseaddr += fb->conf.hf_offset;
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size = ALIGN(fb->conf.hf_bytes_per_line, 16);
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fb->linecache = (fb_pixel_t*)malloc(size);
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if (fb->linecache == NULL)
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return (-1);
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fb->workbuf = (fb_pixel_t*)malloc(size);
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if (fb->workbuf == NULL)
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return (-1);
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if (fb->conf.hf_access_flags & HPCFB_ACCESS_REVERSE) {
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fb->white = 0;
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fb->black = ~0;
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} else {
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fb->white = ~0;
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fb->black = 0;
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}
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/*
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* clear screen
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*/
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for (y = 0; y < fb->conf.hf_height; y++) {
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fb_getline(fb, y);
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memset(fb->linecache, fb->black,
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ALIGN(fb->conf.hf_bytes_per_line, 16));
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fb_putline(fb, y);
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}
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return (0);
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}
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static void
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__fb_swap_workbuf(struct fb *fb)
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{
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int i, n;
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n = ALIGN(fb->conf.hf_bytes_per_line, 16) / sizeof(fb_pixel_t);
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if (fb->conf.hf_order_flags & HPCFB_REVORDER_BYTE) {
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for (i = 0; i < n; i++)
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fb->workbuf[i] =
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((fb->workbuf[i] << 8) & 0xff00ff00) |
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((fb->workbuf[i] >> 8) & 0x00ff00ff);
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}
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if (fb->conf.hf_order_flags & HPCFB_REVORDER_WORD) {
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for (i = 0; i < n; i++)
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fb->workbuf[i] =
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((fb->workbuf[i] << 16) & 0xffff0000) |
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((fb->workbuf[i] >> 16) & 0x0000ffff);
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}
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if (fb->conf.hf_order_flags & HPCFB_REVORDER_DWORD) {
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for (i = 0; i < n; i += 2) {
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fb_pixel_t tmp;
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tmp = fb->workbuf[i];
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fb->workbuf[i] = fb->workbuf[i + 1];
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fb->workbuf[i + 1] = tmp;
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}
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}
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if (fb->conf.hf_order_flags & HPCFB_REVORDER_QWORD) {
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for (i = 0; i < n; i += 4) {
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fb_pixel_t tmp;
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tmp = fb->workbuf[i + 0];
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fb->workbuf[i + 0] = fb->workbuf[i + 2];
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fb->workbuf[i + 2] = tmp;
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tmp = fb->workbuf[i + 1];
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fb->workbuf[i + 1] = fb->workbuf[i + 3];
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fb->workbuf[i + 3] = tmp;
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}
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}
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}
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static void
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__fb_put_pixel(struct fb *fb, fb_pixel_t pixel, int width, int x)
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{
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fb_pixel_t mask = (1 << width) - 1;
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x -= (bitsizeof(fb_pixel_t) - width);
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if (x < 0) {
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pixel <<= -x;
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mask <<= -x;
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fb->linecache[0] = (fb->linecache[0]&~mask) | (pixel&~mask);
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} else {
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fb_pixel_t *dst = &fb->linecache[x / bitsizeof(fb_pixel_t)];
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x %= bitsizeof(fb_pixel_t);
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*dst = (*dst & ~(mask>>x)) | ((pixel>>x) & (mask>>x));
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dst++;
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if (x == 0)
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return;
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x = bitsizeof(fb_pixel_t) - x;
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*dst = (*dst & ~(mask<<x)) | ((pixel<<x) & (mask<<x));
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}
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}
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void
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fb_getline(struct fb *fb, int y)
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{
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int i, n;
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unsigned char *src;
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fb_pixel_t *dst;
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src = fb->baseaddr + fb->conf.hf_bytes_per_line * y;
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dst = fb->workbuf;
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n = ALIGN(fb->conf.hf_bytes_per_line, 16) / sizeof(fb_pixel_t);
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for (i = 0; i < n; i++) {
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*dst++ = ((fb_pixel_t)src[0] << 24) |
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((fb_pixel_t)src[1] << 16) |
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((fb_pixel_t)src[2] << 8) |
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((fb_pixel_t)src[3] << 0);
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src += 4;
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}
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__fb_swap_workbuf(fb);
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memcpy(fb->linecache, fb->workbuf, n * sizeof(fb_pixel_t));
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}
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void
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fb_putline(struct fb *fb, int y)
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{
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int i, n;
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unsigned char *dst;
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fb_pixel_t *src;
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src = fb->workbuf;
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dst = fb->baseaddr + fb->conf.hf_bytes_per_line * y;
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n = ALIGN(fb->conf.hf_bytes_per_line, 16) / sizeof(fb_pixel_t);
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memcpy(fb->workbuf, fb->linecache, n * sizeof(fb_pixel_t));
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__fb_swap_workbuf(fb);
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for (i = 0; i < n; i++) {
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*dst++ = (*src >> 24) & 0xff;
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*dst++ = (*src >> 16) & 0xff;
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*dst++ = (*src >> 8) & 0xff;
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*dst++ = (*src >> 0) & 0xff;
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src++;
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}
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}
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void
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fb_fetchline(struct fb *fb, int y)
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{
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if (fb->linecache_y == y)
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return;
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fb_getline(fb, y);
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fb->linecache_y = y;
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}
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void
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fb_flush(struct fb *fb)
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{
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if (fb->linecache_y != INVALID_CACHE)
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fb_putline(fb, fb->linecache_y);
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}
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void
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fb_drawpixel(struct fb *fb, int x, int y, fb_pixel_t pixel)
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{
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int pack;
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if (fb->conf.hf_access_flags & HPCFB_ACCESS_Y_TO_X)
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SWAP(x, y);
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if (fb->conf.hf_access_flags & HPCFB_ACCESS_R_TO_L)
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x = fb->conf.hf_width - x - 1;
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if (fb->conf.hf_access_flags & HPCFB_ACCESS_B_TO_T)
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y = fb->conf.hf_height - y - 1;
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if (x < 0 || y < 0 || fb->conf.hf_width <= x || fb->conf.hf_height < y)
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return;
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pack = x / fb->conf.hf_pixels_per_pack;
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x %= fb->conf.hf_pixels_per_pack;
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if (fb->conf.hf_access_flags & HPCFB_ACCESS_LSB_TO_MSB)
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x = fb->conf.hf_pixels_per_pack - x - 1;
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x *= fb->conf.hf_pixel_width;
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if (fb->conf.hf_access_flags & HPCFB_ACCESS_PACK_BLANK)
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x += (fb->conf.hf_pack_width -
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fb->conf.hf_pixel_width * fb->conf.hf_pixels_per_pack);
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x += pack * fb->conf.hf_pack_width;
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if (fb->linecache_y != y) {
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fb_flush(fb);
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fb_fetchline(fb, y);
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}
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__fb_put_pixel(fb, pixel, fb->conf.hf_pixel_width, x);
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}
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void
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fb_drawline(struct fb *fb, int x0, int y0, int x1, int y1, fb_pixel_t pixel)
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{
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int i, dx, dy, d, incdec;
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dx = ABS(x1 - x0);
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dy = ABS(y1 - y0);
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if (dx < dy) {
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if (y1 < y0) {
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SWAP(x0, x1);
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SWAP(y0, y1);
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}
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if (x0 < x1)
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incdec = 1;
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else
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incdec = -1;
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d = -dy;
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dx *= 2;
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dy *= 2;
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for (i = y0; i <= y1; i++) {
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fb_drawpixel(fb, x0, i, pixel);
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d += dx;
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if (0 <= d) {
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d -= dy;
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x0 += incdec;
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}
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}
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} else {
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if (x1 < x0) {
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SWAP(x0, x1);
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SWAP(y0, y1);
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}
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if (y0 < y1)
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incdec = 1;
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else
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incdec = -1;
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d = -dx;
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dx *= 2;
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dy *= 2;
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for (i = x0; i <= x1; i++) {
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fb_drawpixel(fb, i, y0, pixel);
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d += dy;
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if (0 <= d) {
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d -= dx;
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y0 += incdec;
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}
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}
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}
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}
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