mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-27 14:42:07 +00:00
502 lines
11 KiB
C
502 lines
11 KiB
C
/* Copyright (C) 1996-1997 Id Software, Inc.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
See file, 'COPYING', for details.
|
|
*/
|
|
|
|
// lbmlib.c
|
|
|
|
#include "QF/qendian.h"
|
|
|
|
#include "cmdlib.h"
|
|
#include "lbmlib.h"
|
|
|
|
/*
|
|
============================================================================
|
|
|
|
LBM STUFF
|
|
|
|
============================================================================
|
|
*/
|
|
|
|
#define FORMID ('F'+('O'<<8)+((int)'R'<<16)+((int)'M'<<24))
|
|
#define ILBMID ('I'+('L'<<8)+((int)'B'<<16)+((int)'M'<<24))
|
|
#define PBMID ('P'+('B'<<8)+((int)'M'<<16)+((int)' '<<24))
|
|
#define BMHDID ('B'+('M'<<8)+((int)'H'<<16)+((int)'D'<<24))
|
|
#define BODYID ('B'+('O'<<8)+((int)'D'<<16)+((int)'Y'<<24))
|
|
#define CMAPID ('C'+('M'<<8)+((int)'A'<<16)+((int)'P'<<24))
|
|
|
|
|
|
bmhd_t bmhd;
|
|
|
|
static int
|
|
Align (int l)
|
|
{
|
|
if (l&1)
|
|
return l+1;
|
|
return l;
|
|
}
|
|
|
|
/*
|
|
================
|
|
LBMRLEdecompress
|
|
|
|
Source must be evenly aligned!
|
|
================
|
|
*/
|
|
static byte *
|
|
LBMRLEDecompress (byte *source, byte *unpacked, int bpwidth)
|
|
{
|
|
int count;
|
|
byte b, rept;
|
|
|
|
count = 0;
|
|
|
|
do {
|
|
rept = *source++;
|
|
|
|
if (rept > 0x80) {
|
|
rept = (rept ^ 0xff) + 2;
|
|
b = *source++;
|
|
memset (unpacked, b, rept);
|
|
unpacked += rept;
|
|
} else if (rept < 0x80) {
|
|
rept++;
|
|
memcpy (unpacked, source, rept);
|
|
unpacked += rept;
|
|
source += rept;
|
|
} else
|
|
rept = 0; // rept of 0x80 is NOP
|
|
|
|
count += rept;
|
|
|
|
} while (count < bpwidth);
|
|
|
|
if (count > bpwidth)
|
|
Error ("Decompression exceeded width!\n");
|
|
|
|
|
|
return source;
|
|
}
|
|
|
|
#define BPLANESIZE 128
|
|
byte bitplanes[9][BPLANESIZE]; // max size 1024 by 9 bit planes
|
|
|
|
/*
|
|
=================
|
|
MungeBitPlanes8
|
|
|
|
Asm version destroys the bit plane data!
|
|
=================
|
|
*/
|
|
static void
|
|
MungeBitPlanes8 (int width, byte *dest)
|
|
{
|
|
int i, ind = 0;
|
|
|
|
while (width--) {
|
|
for (i = 0; i < 8; i++) {
|
|
*dest++ = (((bitplanes[7][ind] << i) & 128) >> 0)
|
|
| (((bitplanes[6][ind] << i) & 128) >> 1)
|
|
| (((bitplanes[5][ind] << i) & 128) >> 2)
|
|
| (((bitplanes[4][ind] << i) & 128) >> 3)
|
|
| (((bitplanes[3][ind] << i) & 128) >> 4)
|
|
| (((bitplanes[2][ind] << i) & 128) >> 5)
|
|
| (((bitplanes[1][ind] << i) & 128) >> 6)
|
|
| (((bitplanes[0][ind] << i) & 128) >> 7);
|
|
}
|
|
ind++;
|
|
}
|
|
#if 0
|
|
asm les di,[dest]
|
|
asm mov si,-1
|
|
asm mov cx,[width]
|
|
mungebyte:
|
|
asm inc si
|
|
asm mov dx,8
|
|
mungebit:
|
|
asm shl [BYTE PTR bitplanes + BPLANESIZE*7 +si],1
|
|
asm rcl al,1
|
|
asm shl [BYTE PTR bitplanes + BPLANESIZE*6 +si],1
|
|
asm rcl al,1
|
|
asm shl [BYTE PTR bitplanes + BPLANESIZE*5 +si],1
|
|
asm rcl al,1
|
|
asm shl [BYTE PTR bitplanes + BPLANESIZE*4 +si],1
|
|
asm rcl al,1
|
|
asm shl [BYTE PTR bitplanes + BPLANESIZE*3 +si],1
|
|
asm rcl al,1
|
|
asm shl [BYTE PTR bitplanes + BPLANESIZE*2 +si],1
|
|
asm rcl al,1
|
|
asm shl [BYTE PTR bitplanes + BPLANESIZE*1 +si],1
|
|
asm rcl al,1
|
|
asm shl [BYTE PTR bitplanes + BPLANESIZE*0 +si],1
|
|
asm rcl al,1
|
|
asm stosb
|
|
asm dec cx
|
|
asm jz done
|
|
asm dec dx
|
|
asm jnz mungebit
|
|
asm jmp mungebyte
|
|
|
|
done:
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
MungeBitPlanes4 (int width, byte *dest)
|
|
{
|
|
int i, ind = 0;
|
|
|
|
while (width--) {
|
|
for (i = 0; i < 8; i++) {
|
|
*dest++ = (((bitplanes[3][ind] << i) & 128) >> 4)
|
|
| (((bitplanes[2][ind] << i) & 128) >> 5)
|
|
| (((bitplanes[1][ind] << i) & 128) >> 6)
|
|
| (((bitplanes[0][ind] << i) & 128) >> 7);
|
|
}
|
|
ind++;
|
|
}
|
|
#if 0
|
|
|
|
asm les di,[dest]
|
|
asm mov si,-1
|
|
asm mov cx,[width]
|
|
mungebyte:
|
|
asm inc si
|
|
asm mov dx,8
|
|
mungebit:
|
|
asm xor al,al
|
|
asm shl [BYTE PTR bitplanes + BPLANESIZE*3 +si],1
|
|
asm rcl al,1
|
|
asm shl [BYTE PTR bitplanes + BPLANESIZE*2 +si],1
|
|
asm rcl al,1
|
|
asm shl [BYTE PTR bitplanes + BPLANESIZE*1 +si],1
|
|
asm rcl al,1
|
|
asm shl [BYTE PTR bitplanes + BPLANESIZE*0 +si],1
|
|
asm rcl al,1
|
|
asm stosb
|
|
asm dec cx
|
|
asm jz done
|
|
asm dec dx
|
|
asm jnz mungebit
|
|
asm jmp mungebyte
|
|
|
|
done:
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
MungeBitPlanes2 (int width, byte *dest)
|
|
{
|
|
int i, ind = 0;
|
|
|
|
while (width--) {
|
|
for (i = 0; i < 8; i++) {
|
|
*dest++ = (((bitplanes[1][ind] << i) & 128) >> 6)
|
|
| (((bitplanes[0][ind] << i) & 128) >> 7);
|
|
}
|
|
ind++;
|
|
}
|
|
#if 0
|
|
asm les di,[dest]
|
|
asm mov si,-1
|
|
asm mov cx,[width]
|
|
mungebyte:
|
|
asm inc si
|
|
asm mov dx,8
|
|
mungebit:
|
|
asm xor al,al
|
|
asm shl [BYTE PTR bitplanes + BPLANESIZE*1 +si],1
|
|
asm rcl al,1
|
|
asm shl [BYTE PTR bitplanes + BPLANESIZE*0 +si],1
|
|
asm rcl al,1
|
|
asm stosb
|
|
asm dec cx
|
|
asm jz done
|
|
asm dec dx
|
|
asm jnz mungebit
|
|
asm jmp mungebyte
|
|
|
|
done:
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
MungeBitPlanes1 (int width, byte *dest)
|
|
{
|
|
int i, ind = 0;
|
|
|
|
while (width--) {
|
|
for (i = 0; i < 8; i++) {
|
|
*dest++ = (((bitplanes[0][ind] << i) & 128) >> 7);
|
|
}
|
|
ind++;
|
|
}
|
|
#if 0
|
|
asm les di,[dest]
|
|
asm mov si,-1
|
|
asm mov cx,[width]
|
|
mungebyte:
|
|
asm inc si
|
|
asm mov dx,8
|
|
mungebit:
|
|
asm xor al,al
|
|
asm shl [BYTE PTR bitplanes + BPLANESIZE*0 +si],1
|
|
asm rcl al,1
|
|
asm stosb
|
|
asm dec cx
|
|
asm jz done
|
|
asm dec dx
|
|
asm jnz mungebit
|
|
asm jmp mungebyte
|
|
|
|
done:
|
|
#endif
|
|
}
|
|
|
|
void
|
|
LoadLBM (char *filename, byte **picture, byte **palette)
|
|
{
|
|
byte *LBMbuffer, *picbuffer, *cmapbuffer;
|
|
byte *LBM_P, *LBMEND_P;
|
|
byte *pic_p;
|
|
byte *body_p;
|
|
unsigned rowsize;
|
|
int y, p, planes;
|
|
int formtype, formlength;
|
|
int chunktype, chunklength;
|
|
|
|
void (*mungecall) (int, byte *);
|
|
|
|
// quiet compiler warnings
|
|
picbuffer = NULL;
|
|
cmapbuffer = NULL;
|
|
mungecall = NULL;
|
|
|
|
// load the LBM
|
|
LoadFile (filename, (void **) (char *)&LBMbuffer);
|
|
|
|
// parse the LBM header
|
|
LBM_P = LBMbuffer;
|
|
if (*(int *) LBMbuffer != LittleLong (FORMID))
|
|
Error ("No FORM ID at start of file!\n");
|
|
|
|
LBM_P += 4;
|
|
formlength = BigLong (*(int *) LBM_P );
|
|
LBM_P += 4;
|
|
LBMEND_P = LBM_P + Align (formlength);
|
|
|
|
formtype = LittleLong (*(int *) LBM_P);
|
|
|
|
if (formtype != ILBMID && formtype != PBMID)
|
|
Error ("Unrecognized form type: %c%c%c%c\n", formtype & 0xff,
|
|
(formtype >> 8) & 0xff, (formtype >> 16) & 0xff,
|
|
(formtype >> 24) & 0xff);
|
|
|
|
LBM_P += 4;
|
|
|
|
// parse chunks
|
|
while (LBM_P < LBMEND_P) {
|
|
chunktype = LBM_P[0] + (LBM_P[1] << 8) + (LBM_P[2] << 16)
|
|
+ (LBM_P[3] << 24);
|
|
LBM_P += 4;
|
|
chunklength = LBM_P[3] + (LBM_P[2] << 8) + (LBM_P[1] << 16)
|
|
+ (LBM_P[0] << 24);
|
|
LBM_P += 4;
|
|
|
|
switch (chunktype) {
|
|
case BMHDID:
|
|
memcpy (&bmhd, LBM_P, sizeof (bmhd));
|
|
bmhd.w = BigShort (bmhd.w);
|
|
bmhd.h = BigShort (bmhd.h);
|
|
bmhd.x = BigShort (bmhd.x);
|
|
bmhd.y = BigShort (bmhd.y);
|
|
bmhd.pageWidth = BigShort (bmhd.pageWidth);
|
|
bmhd.pageHeight = BigShort (bmhd.pageHeight);
|
|
break;
|
|
|
|
case CMAPID:
|
|
cmapbuffer = malloc (768);
|
|
memset (cmapbuffer, 0, 768);
|
|
memcpy (cmapbuffer, LBM_P, chunklength);
|
|
break;
|
|
|
|
case BODYID:
|
|
body_p = LBM_P;
|
|
|
|
pic_p = picbuffer = malloc (bmhd.w * bmhd.h);
|
|
if (formtype == PBMID) {
|
|
// unpack PBM
|
|
for (y = 0; y < bmhd.h; y++, pic_p += bmhd.w) {
|
|
if (bmhd.compression == cm_rle1)
|
|
body_p = LBMRLEDecompress ((byte *) body_p , pic_p,
|
|
bmhd.w);
|
|
else if (bmhd.compression == cm_none) {
|
|
memcpy (pic_p,body_p,bmhd.w);
|
|
body_p += Align(bmhd.w);
|
|
}
|
|
}
|
|
} else {
|
|
// unpack ILBM
|
|
planes = bmhd.nPlanes;
|
|
if (bmhd.masking == ms_mask)
|
|
planes++;
|
|
rowsize = (bmhd.w + 15) / 16 * 2;
|
|
switch (bmhd.nPlanes) {
|
|
case 1:
|
|
mungecall = MungeBitPlanes1;
|
|
break;
|
|
case 2:
|
|
mungecall = MungeBitPlanes2;
|
|
break;
|
|
case 4:
|
|
mungecall = MungeBitPlanes4;
|
|
break;
|
|
case 8:
|
|
mungecall = MungeBitPlanes8;
|
|
break;
|
|
default:
|
|
Error ("Can't munge %i bit planes!\n",bmhd.nPlanes);
|
|
}
|
|
|
|
for (y = 0; y < bmhd.h; y++, pic_p += bmhd.w) {
|
|
for (p = 0; p < planes; p++)
|
|
if (bmhd.compression == cm_rle1)
|
|
body_p = LBMRLEDecompress ((byte *) body_p,
|
|
bitplanes[p], rowsize);
|
|
else if (bmhd.compression == cm_none) {
|
|
memcpy (bitplanes[p], body_p, rowsize);
|
|
body_p += rowsize;
|
|
}
|
|
|
|
mungecall (bmhd.w , pic_p);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
LBM_P += Align (chunklength);
|
|
}
|
|
|
|
free (LBMbuffer);
|
|
|
|
*picture = picbuffer;
|
|
*palette = cmapbuffer;
|
|
}
|
|
|
|
/*
|
|
============================================================================
|
|
|
|
WRITE LBM
|
|
|
|
============================================================================
|
|
*/
|
|
|
|
void
|
|
WriteLBMfile (char *filename, byte *data, int width, int height, byte *palette)
|
|
{
|
|
byte *lbm, *lbmptr;
|
|
int *formlength, *bmhdlength, *cmaplength, *bodylength;
|
|
int length;
|
|
bmhd_t basebmhd;
|
|
|
|
lbm = lbmptr = malloc (width*height+1000);
|
|
|
|
// start FORM
|
|
*lbmptr++ = 'F';
|
|
*lbmptr++ = 'O';
|
|
*lbmptr++ = 'R';
|
|
*lbmptr++ = 'M';
|
|
|
|
formlength = (int*)lbmptr;
|
|
lbmptr+=4; // leave space for length
|
|
|
|
*lbmptr++ = 'P';
|
|
*lbmptr++ = 'B';
|
|
*lbmptr++ = 'M';
|
|
*lbmptr++ = ' ';
|
|
|
|
// write BMHD
|
|
*lbmptr++ = 'B';
|
|
*lbmptr++ = 'M';
|
|
*lbmptr++ = 'H';
|
|
*lbmptr++ = 'D';
|
|
|
|
bmhdlength = (int *) lbmptr;
|
|
lbmptr += 4; // leave space for length
|
|
|
|
memset (&basebmhd, 0, sizeof (basebmhd));
|
|
basebmhd.w = BigShort ((short) width);
|
|
basebmhd.h = BigShort ((short) height);
|
|
basebmhd.nPlanes = BigShort (8);
|
|
basebmhd.xAspect = BigShort (5);
|
|
basebmhd.yAspect = BigShort (6);
|
|
basebmhd.pageWidth = BigShort ((short) width);
|
|
basebmhd.pageHeight = BigShort ((short) height);
|
|
|
|
memcpy (lbmptr, &basebmhd, sizeof (basebmhd));
|
|
lbmptr += sizeof (basebmhd);
|
|
|
|
length = lbmptr - (byte *) bmhdlength - 4;
|
|
*bmhdlength = BigLong (length);
|
|
if (length & 1)
|
|
*lbmptr++ = 0; // pad chunk to even offset
|
|
|
|
// write CMAP
|
|
*lbmptr++ = 'C';
|
|
*lbmptr++ = 'M';
|
|
*lbmptr++ = 'A';
|
|
*lbmptr++ = 'P';
|
|
|
|
cmaplength = (int *) lbmptr;
|
|
lbmptr += 4; // leave space for length
|
|
|
|
memcpy (lbmptr, palette, 768);
|
|
lbmptr += 768;
|
|
|
|
length = lbmptr - (byte *) cmaplength - 4;
|
|
*cmaplength = BigLong (length);
|
|
if (length & 1)
|
|
*lbmptr++ = 0; // pad chunk to even offset
|
|
|
|
// write BODY
|
|
*lbmptr++ = 'B';
|
|
*lbmptr++ = 'O';
|
|
*lbmptr++ = 'D';
|
|
*lbmptr++ = 'Y';
|
|
|
|
bodylength = (int *) lbmptr;
|
|
lbmptr += 4; // leave space for length
|
|
|
|
memcpy (lbmptr, data, width * height);
|
|
lbmptr += width * height;
|
|
|
|
length = lbmptr - (byte *) bodylength - 4;
|
|
*bodylength = BigLong(length);
|
|
if (length & 1)
|
|
*lbmptr++ = 0; // pad chunk to even offset
|
|
|
|
// done
|
|
length = lbmptr - (byte *) formlength - 4;
|
|
*formlength = BigLong (length);
|
|
if (length & 1)
|
|
*lbmptr++ = 0; // pad chunk to even offset
|
|
|
|
// write output file
|
|
SaveFile (filename, lbm, lbmptr - lbm);
|
|
free (lbm);
|
|
}
|
|
|