FreeBSD-5.3/sys/dev/fb/splash_pcx.c
/*-
* Copyright (c) 1999 Michael Smith <msmith@freebsd.org>
* Copyright (c) 1999 Kazutaka YOKOTA <yokota@freebsd.org>
* Copyright (c) 1999 Dag-Erling Coïdan Smørgrav
* 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
* in this position and unchanged.
* 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. 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.
*
* $FreeBSD: src/sys/dev/fb/splash_pcx.c,v 1.8 2004/08/06 21:35:51 des Exp $
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/linker.h>
#include <sys/module.h>
#include <sys/fbio.h>
#include <dev/fb/fbreg.h>
#include <dev/fb/splashreg.h>
static int splash_mode = -1;
static int splash_on = FALSE;
static int pcx_start(video_adapter_t *adp);
static int pcx_end(video_adapter_t *adp);
static int pcx_splash(video_adapter_t *adp, int on);
static int pcx_init(void *data, int sdepth);
static int pcx_draw(video_adapter_t *adp);
static splash_decoder_t pcx_decoder = {
.name = "splash_pcx",
.init = pcx_start,
.term = pcx_end,
.splash = pcx_splash,
.data_type = SPLASH_IMAGE,
};
SPLASH_DECODER(splash_pcx, pcx_decoder);
static struct {
int width;
int height;
int bpsl;
int bpp;
int planes;
int zlen;
const uint8_t *zdata;
uint8_t *palette;
} pcx_info;
static int
pcx_start(video_adapter_t *adp)
{
static int modes[] = {
M_VGA_CG320,
M_VESA_CG640x480,
M_VESA_CG800x600,
M_VESA_CG1024x768,
-1,
};
video_info_t info;
int i;
if (pcx_decoder.data == NULL ||
pcx_decoder.data_size <= 0 ||
pcx_init(pcx_decoder.data, pcx_decoder.data_size))
return (ENODEV);
if (bootverbose)
printf("splash_pcx: image good:\n"
" width = %d\n"
" height = %d\n"
" depth = %d\n"
" planes = %d\n",
pcx_info.width, pcx_info.height,
pcx_info.bpp, pcx_info.planes);
for (i = 0; modes[i] >= 0; ++i) {
if (get_mode_info(adp, modes[i], &info) != 0)
continue;
if (bootverbose)
printf("splash_pcx: considering mode %d:\n"
" vi_width = %d\n"
" vi_height = %d\n"
" vi_depth = %d\n"
" vi_planes = %d\n",
modes[i],
info.vi_width, info.vi_height,
info.vi_depth, info.vi_planes);
if (info.vi_width >= pcx_info.width
&& info.vi_height >= pcx_info.height
&& info.vi_depth == pcx_info.bpp
&& info.vi_planes == pcx_info.planes)
break;
}
splash_mode = modes[i];
if (splash_mode == -1)
return (ENODEV);
if (bootverbose)
printf("splash_pcx: selecting mode %d\n", splash_mode);
return (0);
}
static int
pcx_end(video_adapter_t *adp)
{
/* nothing to do */
return (0);
}
static int
pcx_splash(video_adapter_t *adp, int on)
{
if (on) {
if (!splash_on) {
if (set_video_mode(adp, splash_mode) || pcx_draw(adp))
return 1;
splash_on = TRUE;
}
return (0);
} else {
splash_on = FALSE;
return (0);
}
}
struct pcx_header {
uint8_t manufactor;
uint8_t version;
uint8_t encoding;
uint8_t bpp;
uint16_t xmin;
uint16_t ymin;
uint16_t xmax;
uint16_t ymax;
uint16_t hres;
uint16_t vres;
uint8_t colormap[48];
uint8_t rsvd;
uint8_t nplanes;
uint16_t bpsl;
uint16_t palinfo;
uint16_t hsize;
uint16_t vsize;
};
#define MAXSCANLINE 1024
static int
pcx_init(void *data, int size)
{
const struct pcx_header *hdr = data;
if (size < 128 + 1 + 1 + 768 ||
hdr->manufactor != 10 ||
hdr->version != 5 ||
hdr->encoding != 1 ||
hdr->nplanes != 1 ||
hdr->bpp != 8 ||
hdr->bpsl > MAXSCANLINE ||
((uint8_t *)data)[size - 769] != 12) {
printf("splash_pcx: invalid PCX image\n");
return (1);
}
pcx_info.width = hdr->xmax - hdr->xmin + 1;
pcx_info.height = hdr->ymax - hdr->ymin + 1;
pcx_info.bpsl = hdr->bpsl;
pcx_info.bpp = hdr->bpp;
pcx_info.planes = hdr->nplanes;
pcx_info.zlen = size - (128 + 1 + 768);
pcx_info.zdata = (uint8_t *)data + 128;
pcx_info.palette = (uint8_t *)data + size - 768;
return (0);
}
static int
pcx_draw(video_adapter_t *adp)
{
uint8_t *vidmem;
int swidth, sheight, sbpsl, sdepth, splanes;
int banksize, origin;
int c, i, j, pos, scan, x, y;
uint8_t line[MAXSCANLINE];
if (pcx_info.zlen < 1)
return (1);
load_palette(adp, pcx_info.palette);
vidmem = (uint8_t *)adp->va_window;
swidth = adp->va_info.vi_width;
sheight = adp->va_info.vi_height;
sbpsl = adp->va_line_width;
sdepth = adp->va_info.vi_depth;
splanes = adp->va_info.vi_planes;
banksize = adp->va_window_size;
for (origin = 0; origin < sheight*sbpsl; origin += banksize) {
set_origin(adp, origin);
bzero(vidmem, banksize);
}
x = (swidth - pcx_info.width) / 2;
y = (sheight - pcx_info.height) / 2;
origin = 0;
pos = y * sbpsl + x;
while (pos > banksize) {
pos -= banksize;
origin += banksize;
}
set_origin(adp, origin);
for (scan = i = 0; scan < pcx_info.height; ++scan, ++y, pos += sbpsl) {
for (j = 0; j < pcx_info.bpsl && i < pcx_info.zlen; ++i) {
if ((pcx_info.zdata[i] & 0xc0) == 0xc0) {
c = pcx_info.zdata[i++] & 0x3f;
if (i >= pcx_info.zlen)
return (1);
} else {
c = 1;
}
if (j + c > pcx_info.bpsl)
return (1);
while (c--)
line[j++] = pcx_info.zdata[i];
}
if (pos > banksize) {
origin += banksize;
pos -= banksize;
set_origin(adp, origin);
}
if (pos + pcx_info.width > banksize) {
/* scanline crosses bank boundary */
j = banksize - pos;
bcopy(line, vidmem + pos, j);
origin += banksize;
pos -= banksize;
set_origin(adp, origin);
bcopy(line + j, vidmem, pcx_info.width - j);
} else {
bcopy(line, vidmem + pos, pcx_info.width);
}
}
return (0);
}