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gtkradiant/tools/quake2/common/lbmlib.c
TTimo 12b372f89c ok 
git-svn-id: svn://svn.icculus.org/gtkradiant/GtkRadiant@1 8a3a26a2-13c4-0310-b231-cf6edde360e5
2006-02-10 22:01:20 +00:00

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/*
Copyright (C) 1999-2006 Id Software, Inc. and contributors.
For a list of contributors, see the accompanying CONTRIBUTORS file.
This file is part of GtkRadiant.
GtkRadiant 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.
GtkRadiant 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 GtkRadiant; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
// lbmlib.c
#include "cmdlib.h"
#include "inout.h"
#include "lbmlib.h"
/*
============================================================================
LBM STUFF
============================================================================
*/
typedef unsigned char UBYTE;
//conflicts with windows typedef short WORD;
typedef unsigned short UWORD;
typedef long LONG;
typedef enum
{
ms_none,
ms_mask,
ms_transcolor,
ms_lasso
} mask_t;
typedef enum
{
cm_none,
cm_rle1
} compress_t;
typedef struct
{
UWORD w,h;
short x,y;
UBYTE nPlanes;
UBYTE masking;
UBYTE compression;
UBYTE pad1;
UWORD transparentColor;
UBYTE xAspect,yAspect;
short pageWidth,pageHeight;
} bmhd_t;
extern bmhd_t bmhd; // will be in native byte order
#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;
int Align (int l)
{
if (l&1)
return l+1;
return l;
}
/*
================
LBMRLEdecompress
Source must be evenly aligned!
================
*/
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;
}
/*
=================
LoadLBM
=================
*/
void LoadLBM (char *filename, byte **picture, byte **palette)
{
byte *LBMbuffer, *picbuffer, *cmapbuffer;
int y;
byte *LBM_P, *LBMEND_P;
byte *pic_p;
byte *body_p;
int formtype,formlength;
int chunktype,chunklength;
// qiet compiler warnings
picbuffer = NULL;
cmapbuffer = NULL;
//
// load the LBM
//
LoadFile (filename, (void **)&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
//
Error ("%s is an interlaced LBM, not packed", filename);
}
break;
}
LBM_P += Align(chunklength);
}
free (LBMbuffer);
*picture = picbuffer;
if (palette)
*palette = cmapbuffer;
}
/*
============================================================================
WRITE LBM
============================================================================
*/
/*
==============
WriteLBMfile
==============
*/
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);
}
/*
============================================================================
LOAD PCX
============================================================================
*/
typedef struct
{
char manufacturer;
char version;
char encoding;
char bits_per_pixel;
unsigned short xmin,ymin,xmax,ymax;
unsigned short hres,vres;
unsigned char palette[48];
char reserved;
char color_planes;
unsigned short bytes_per_line;
unsigned short palette_type;
char filler[58];
unsigned char data; // unbounded
} pcx_t;
/*
==============
LoadPCX
==============
*/
void LoadPCX (char *filename, byte **pic, byte **palette, int *width, int *height)
{
byte *raw;
pcx_t *pcx;
int x, y;
int len;
int dataByte, runLength;
byte *out, *pix;
//
// load the file
//
len = LoadFile (filename, (void **)&raw);
//
// parse the PCX file
//
pcx = (pcx_t *)raw;
raw = &pcx->data;
pcx->xmin = LittleShort(pcx->xmin);
pcx->ymin = LittleShort(pcx->ymin);
pcx->xmax = LittleShort(pcx->xmax);
pcx->ymax = LittleShort(pcx->ymax);
pcx->hres = LittleShort(pcx->hres);
pcx->vres = LittleShort(pcx->vres);
pcx->bytes_per_line = LittleShort(pcx->bytes_per_line);
pcx->palette_type = LittleShort(pcx->palette_type);
if (pcx->manufacturer != 0x0a
|| pcx->version != 5
|| pcx->encoding != 1
|| pcx->bits_per_pixel != 8
|| pcx->xmax >= 640
|| pcx->ymax >= 480)
Error ("Bad pcx file %s", filename);
if (palette)
{
*palette = malloc(768);
memcpy (*palette, (byte *)pcx + len - 768, 768);
}
if (width)
*width = pcx->xmax+1;
if (height)
*height = pcx->ymax+1;
if (!pic)
return;
out = malloc ( (pcx->ymax+1) * (pcx->xmax+1) );
if (!out)
Error ("Skin_Cache: couldn't allocate");
*pic = out;
pix = out;
for (y=0 ; y<=pcx->ymax ; y++, pix += pcx->xmax+1)
{
for (x=0 ; x<=pcx->xmax ; )
{
dataByte = *raw++;
if((dataByte & 0xC0) == 0xC0)
{
runLength = dataByte & 0x3F;
dataByte = *raw++;
}
else
runLength = 1;
while(runLength-- > 0)
pix[x++] = dataByte;
}
}
if ( raw - (byte *)pcx > len)
Error ("PCX file %s was malformed", filename);
free (pcx);
}
/*
==============
WritePCXfile
==============
*/
void WritePCXfile (char *filename, byte *data,
int width, int height, byte *palette)
{
int i, j, length;
pcx_t *pcx;
byte *pack;
pcx = malloc (width*height*2+1000);
memset (pcx, 0, sizeof(*pcx));
pcx->manufacturer = 0x0a; // PCX id
pcx->version = 5; // 256 color
pcx->encoding = 1; // uncompressed
pcx->bits_per_pixel = 8; // 256 color
pcx->xmin = 0;
pcx->ymin = 0;
pcx->xmax = LittleShort((short)(width-1));
pcx->ymax = LittleShort((short)(height-1));
pcx->hres = LittleShort((short)width);
pcx->vres = LittleShort((short)height);
pcx->color_planes = 1; // chunky image
pcx->bytes_per_line = LittleShort((short)width);
pcx->palette_type = LittleShort(2); // not a grey scale
// pack the image
pack = &pcx->data;
for (i=0 ; i<height ; i++)
{
for (j=0 ; j<width ; j++)
{
if ( (*data & 0xc0) != 0xc0)
*pack++ = *data++;
else
{
*pack++ = 0xc1;
*pack++ = *data++;
}
}
}
// write the palette
*pack++ = 0x0c; // palette ID byte
for (i=0 ; i<768 ; i++)
*pack++ = *palette++;
// write output file
length = pack - (byte *)pcx;
SaveFile (filename, pcx, length);
free (pcx);
}
/*
============================================================================
LOAD IMAGE
============================================================================
*/
/*
==============
Load256Image
Will load either an lbm or pcx, depending on extension.
Any of the return pointers can be NULL if you don't want them.
==============
*/
void Load256Image (char *name, byte **pixels, byte **palette,
int *width, int *height)
{
char ext[128];
ExtractFileExtension (name, ext);
if (!Q_strncasecmp (ext, "lbm", strlen(ext) ))
{
LoadLBM (name, pixels, palette);
if (width)
*width = bmhd.w;
if (height)
*height = bmhd.h;
}
else if (!Q_strncasecmp (ext, "pcx",strlen(ext)))
{
LoadPCX (name, pixels, palette, width, height);
}
else
Error ("%s doesn't have a known image extension", name);
}
/*
==============
Save256Image
Will save either an lbm or pcx, depending on extension.
==============
*/
void Save256Image (char *name, byte *pixels, byte *palette,
int width, int height)
{
char ext[128];
ExtractFileExtension (name, ext);
if (!Q_strncasecmp (ext, "lbm",strlen(ext)))
{
WriteLBMfile (name, pixels, width, height, palette);
}
else if (!Q_strncasecmp (ext, "pcx",strlen(ext)))
{
WritePCXfile (name, pixels, width, height, palette);
}
else
Error ("%s doesn't have a known image extension", name);
}
/*
============================================================================
TARGA IMAGE
============================================================================
*/
typedef struct _TargaHeader {
unsigned char id_length, colormap_type, image_type;
unsigned short colormap_index, colormap_length;
unsigned char colormap_size;
unsigned short x_origin, y_origin, width, height;
unsigned char pixel_size, attributes;
} TargaHeader;
int fgetLittleShort (FILE *f)
{
byte b1, b2;
b1 = fgetc(f);
b2 = fgetc(f);
return (short)(b1 + b2*256);
}
int fgetLittleLong (FILE *f)
{
byte b1, b2, b3, b4;
b1 = fgetc(f);
b2 = fgetc(f);
b3 = fgetc(f);
b4 = fgetc(f);
return b1 + (b2<<8) + (b3<<16) + (b4<<24);
}
/*
=============
LoadTGA
=============
*/
void LoadTGA (char *name, byte **pixels, int *width, int *height)
{
int columns, rows, numPixels;
byte *pixbuf;
int row, column;
FILE *fin;
byte *targa_rgba;
TargaHeader targa_header;
fin = fopen (name, "rb");
if (!fin)
Error ("Couldn't read %s", name);
targa_header.id_length = fgetc(fin);
targa_header.colormap_type = fgetc(fin);
targa_header.image_type = fgetc(fin);
targa_header.colormap_index = fgetLittleShort(fin);
targa_header.colormap_length = fgetLittleShort(fin);
targa_header.colormap_size = fgetc(fin);
targa_header.x_origin = fgetLittleShort(fin);
targa_header.y_origin = fgetLittleShort(fin);
targa_header.width = fgetLittleShort(fin);
targa_header.height = fgetLittleShort(fin);
targa_header.pixel_size = fgetc(fin);
targa_header.attributes = fgetc(fin);
if (targa_header.image_type!=2
&& targa_header.image_type!=10)
Error ("LoadTGA: Only type 2 and 10 targa RGB images supported\n");
if (targa_header.colormap_type !=0
|| (targa_header.pixel_size!=32 && targa_header.pixel_size!=24))
Error ("Texture_LoadTGA: Only 32 or 24 bit images supported (no colormaps)\n");
columns = targa_header.width;
rows = targa_header.height;
numPixels = columns * rows;
if (width)
*width = columns;
if (height)
*height = rows;
targa_rgba = malloc(numPixels*4);
*pixels = targa_rgba;
if (targa_header.id_length != 0)
fseek(fin, targa_header.id_length, SEEK_CUR); // skip TARGA image comment
if (targa_header.image_type==2) { // Uncompressed, RGB images
for(row=rows-1; row>=0; row--) {
pixbuf = targa_rgba + row*columns*4;
for(column=0; column<columns; column++) {
unsigned char red,green,blue,alphabyte;
switch (targa_header.pixel_size) {
case 24:
blue = getc(fin);
green = getc(fin);
red = getc(fin);
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = 255;
break;
case 32:
blue = getc(fin);
green = getc(fin);
red = getc(fin);
alphabyte = getc(fin);
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = alphabyte;
break;
}
}
}
}
else if (targa_header.image_type==10) { // Runlength encoded RGB images
unsigned char red,green,blue,alphabyte,packetHeader,packetSize,j;
for(row=rows-1; row>=0; row--) {
pixbuf = targa_rgba + row*columns*4;
for(column=0; column<columns; ) {
packetHeader=getc(fin);
packetSize = 1 + (packetHeader & 0x7f);
if (packetHeader & 0x80) { // run-length packet
switch (targa_header.pixel_size) {
case 24:
blue = getc(fin);
green = getc(fin);
red = getc(fin);
alphabyte = 255;
break;
case 32:
blue = getc(fin);
green = getc(fin);
red = getc(fin);
alphabyte = getc(fin);
break;
}
for(j=0;j<packetSize;j++) {
*pixbuf++=red;
*pixbuf++=green;
*pixbuf++=blue;
*pixbuf++=alphabyte;
column++;
if (column==columns) { // run spans across rows
column=0;
if (row>0)
row--;
else
goto breakOut;
pixbuf = targa_rgba + row*columns*4;
}
}
}
else { // non run-length packet
for(j=0;j<packetSize;j++) {
switch (targa_header.pixel_size) {
case 24:
blue = getc(fin);
green = getc(fin);
red = getc(fin);
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = 255;
break;
case 32:
blue = getc(fin);
green = getc(fin);
red = getc(fin);
alphabyte = getc(fin);
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = alphabyte;
break;
}
column++;
if (column==columns) { // pixel packet run spans across rows
column=0;
if (row>0)
row--;
else
goto breakOut;
pixbuf = targa_rgba + row*columns*4;
}
}
}
}
breakOut:;
}
}
// vertically flipped
if ( (targa_header.attributes & (1<<5)) ) {
int flip;
for (row = 0; row < .5f * rows; row++)
{
for (column = 0; column < columns; column++)
{
flip = *( (int*)targa_rgba + row * columns + column);
*( (int*)targa_rgba + row * columns + column) = *( (int*)targa_rgba + ( ( rows - 1 ) - row ) * columns + column );
*( (int*)targa_rgba + ( ( rows - 1 ) - row ) * columns + column ) = flip;
}
}
}
fclose(fin);
}
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