272 lines
6.7 KiB
C
272 lines
6.7 KiB
C
/*-
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* Copyright (c) 1999 Michael Smith <msmith@freebsd.org>
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* Copyright (c) 1999 Kazutaka YOKOTA <yokota@freebsd.org>
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* Copyright (c) 1999 Dag-Erling Coïdan Smørgrav
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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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* in this position and unchanged.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/linker.h>
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#include <sys/module.h>
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#include <sys/fbio.h>
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#include <dev/fb/fbreg.h>
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#include <dev/fb/splashreg.h>
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static int splash_mode = -1;
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static int splash_on = FALSE;
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static int pcx_start(video_adapter_t *adp);
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static int pcx_end(video_adapter_t *adp);
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static int pcx_splash(video_adapter_t *adp, int on);
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static int pcx_init(void *data, int sdepth);
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static int pcx_draw(video_adapter_t *adp);
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static splash_decoder_t pcx_decoder = {
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.name = "splash_pcx",
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.init = pcx_start,
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.term = pcx_end,
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.splash = pcx_splash,
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.data_type = SPLASH_IMAGE,
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};
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SPLASH_DECODER(splash_pcx, pcx_decoder);
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static struct {
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int width;
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int height;
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int bpsl;
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int bpp;
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int planes;
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int zlen;
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const uint8_t *zdata;
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uint8_t *palette;
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} pcx_info;
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static int
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pcx_start(video_adapter_t *adp)
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{
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static int modes[] = {
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M_VGA_CG320,
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M_VESA_CG640x480,
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M_VESA_CG800x600,
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M_VESA_CG1024x768,
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-1,
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};
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video_info_t info;
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int i;
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if (pcx_decoder.data == NULL ||
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pcx_decoder.data_size <= 0 ||
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pcx_init(pcx_decoder.data, pcx_decoder.data_size))
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return (ENODEV);
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if (bootverbose)
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printf("splash_pcx: image good:\n"
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" width = %d\n"
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" height = %d\n"
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" depth = %d\n"
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" planes = %d\n",
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pcx_info.width, pcx_info.height,
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pcx_info.bpp, pcx_info.planes);
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for (i = 0; modes[i] >= 0; ++i) {
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if (get_mode_info(adp, modes[i], &info) != 0)
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continue;
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if (bootverbose)
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printf("splash_pcx: considering mode %d:\n"
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" vi_width = %d\n"
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" vi_height = %d\n"
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" vi_depth = %d\n"
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" vi_planes = %d\n",
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modes[i],
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info.vi_width, info.vi_height,
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info.vi_depth, info.vi_planes);
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if (info.vi_width >= pcx_info.width
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&& info.vi_height >= pcx_info.height
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&& info.vi_depth == pcx_info.bpp
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&& info.vi_planes == pcx_info.planes)
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break;
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}
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splash_mode = modes[i];
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if (splash_mode == -1)
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return (ENODEV);
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if (bootverbose)
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printf("splash_pcx: selecting mode %d\n", splash_mode);
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return (0);
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}
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static int
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pcx_end(video_adapter_t *adp)
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{
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/* nothing to do */
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return (0);
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}
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static int
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pcx_splash(video_adapter_t *adp, int on)
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{
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if (on) {
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if (!splash_on) {
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if (set_video_mode(adp, splash_mode) || pcx_draw(adp))
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return 1;
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splash_on = TRUE;
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}
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return (0);
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} else {
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splash_on = FALSE;
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return (0);
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}
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}
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struct pcx_header {
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uint8_t manufactor;
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uint8_t version;
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uint8_t encoding;
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uint8_t bpp;
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uint16_t xmin;
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uint16_t ymin;
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uint16_t xmax;
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uint16_t ymax;
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uint16_t hres;
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uint16_t vres;
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uint8_t colormap[48];
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uint8_t rsvd;
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uint8_t nplanes;
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uint16_t bpsl;
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uint16_t palinfo;
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uint16_t hsize;
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uint16_t vsize;
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};
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#define MAXSCANLINE 1024
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static int
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pcx_init(void *data, int size)
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{
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const struct pcx_header *hdr = data;
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if (size < 128 + 1 + 1 + 768 ||
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hdr->manufactor != 10 ||
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hdr->version != 5 ||
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hdr->encoding != 1 ||
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hdr->nplanes != 1 ||
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hdr->bpp != 8 ||
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hdr->bpsl > MAXSCANLINE ||
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((uint8_t *)data)[size - 769] != 12) {
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printf("splash_pcx: invalid PCX image\n");
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return (1);
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}
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pcx_info.width = hdr->xmax - hdr->xmin + 1;
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pcx_info.height = hdr->ymax - hdr->ymin + 1;
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pcx_info.bpsl = hdr->bpsl;
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pcx_info.bpp = hdr->bpp;
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pcx_info.planes = hdr->nplanes;
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pcx_info.zlen = size - (128 + 1 + 768);
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pcx_info.zdata = (uint8_t *)data + 128;
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pcx_info.palette = (uint8_t *)data + size - 768;
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return (0);
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}
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static int
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pcx_draw(video_adapter_t *adp)
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{
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uint8_t *vidmem;
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int swidth, sheight, sbpsl, sdepth, splanes;
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int banksize, origin;
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int c, i, j, pos, scan, x, y;
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uint8_t line[MAXSCANLINE];
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if (pcx_info.zlen < 1)
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return (1);
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load_palette(adp, pcx_info.palette);
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vidmem = (uint8_t *)adp->va_window;
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swidth = adp->va_info.vi_width;
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sheight = adp->va_info.vi_height;
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sbpsl = adp->va_line_width;
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sdepth = adp->va_info.vi_depth;
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splanes = adp->va_info.vi_planes;
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banksize = adp->va_window_size;
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for (origin = 0; origin < sheight*sbpsl; origin += banksize) {
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set_origin(adp, origin);
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bzero(vidmem, banksize);
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}
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x = (swidth - pcx_info.width) / 2;
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y = (sheight - pcx_info.height) / 2;
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origin = 0;
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pos = y * sbpsl + x;
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while (pos > banksize) {
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pos -= banksize;
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origin += banksize;
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}
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set_origin(adp, origin);
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for (scan = i = 0; scan < pcx_info.height; ++scan, ++y, pos += sbpsl) {
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for (j = 0; j < pcx_info.bpsl && i < pcx_info.zlen; ++i) {
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if ((pcx_info.zdata[i] & 0xc0) == 0xc0) {
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c = pcx_info.zdata[i++] & 0x3f;
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if (i >= pcx_info.zlen)
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return (1);
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} else {
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c = 1;
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}
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if (j + c > pcx_info.bpsl)
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return (1);
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while (c--)
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line[j++] = pcx_info.zdata[i];
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}
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if (pos > banksize) {
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origin += banksize;
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pos -= banksize;
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set_origin(adp, origin);
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}
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if (pos + pcx_info.width > banksize) {
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/* scanline crosses bank boundary */
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j = banksize - pos;
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bcopy(line, vidmem + pos, j);
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origin += banksize;
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pos -= banksize;
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set_origin(adp, origin);
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bcopy(line + j, vidmem, pcx_info.width - j);
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} else {
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bcopy(line, vidmem + pos, pcx_info.width);
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}
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}
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return (0);
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}
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