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q3cellshading/q3radiant/LBMLIB.CPP
gmiranda db8ca37fa3 Initial commit 
git-svn-id: https://svn.code.sf.net/p/q3cellshading/code/trunk@2 db09e94b-7117-0410-a7e6-85ae5ff6e0e9
2006-07-05 14:05:49 +00:00

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/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.
This file is part of Quake III Arena source code.
Quake III Arena source code 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.
Quake III Arena source code 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 Foobar; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
===========================================================================
*/
// lbmlib.c
#include "stdafx.h"
#include "cmdlib.h"
#include "lbmlib.h"
#include "bmp.h"
#include "pakstuff.h"
#include "jpeglib.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);
if (LBMbuffer == NULL)
{
return;
}
//
// 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 = (unsigned char*)malloc (768);
memset (cmapbuffer, 0, 768);
memcpy (cmapbuffer, LBM_P, chunklength);
break;
case BODYID:
body_p = LBM_P;
pic_p = picbuffer = (unsigned char*)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 = (unsigned char*)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 = 8;
basebmhd.xAspect = 5;
basebmhd.yAspect = 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 = 0;
pcx_t *pcx;
int x, y;
int len;
int dataByte, runLength;
byte *out, *pix;
if (pic)
*pic = NULL;
if (palette)
*palette = NULL;
if (width)
*width = 0;
if (height)
*height = 0;
//
// load the file
//
len = LoadFile (filename, (void **)&raw);
if (len == -1)
return;
//
// 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 = (unsigned char*)malloc(768);
memcpy (*palette, (byte *)pcx + len - 768, 768);
}
if (width)
*width = pcx->xmax+1;
if (height)
*height = pcx->ymax+1;
if (!pic)
{
free(pcx);
return;
}
out = (unsigned char*)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 = (pcx_t*)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];
bitmap_t bmp;
ExtractFileExtension (name, ext);
if (stricmp(ext, "lbm"))
{
LoadLBM (name, pixels, palette);
if (width)
*width = bmhd.w;
if (height)
*height = bmhd.h;
}
else if (stricmp (ext, "pcx"))
{
LoadPCX (name, pixels, palette, width, height);
}
else if (stricmp (ext, "bmp"))
{
LoadBMP (name, &bmp);
if (bmp.palette)
{
*palette = (unsigned char*)malloc (768);
memcpy (*palette, bmp.palette, 768);
}
FreeBMP (&bmp);
}
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 (!strcmp (ext, "lbm"))
{
WriteLBMfile (name, pixels, width, height, palette);
}
else if (!stricmp (ext, "pcx"))
{
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 getLittleShort (byte*& p)
{
byte b1, b2;
b1 = *p++;
b2 = *p++;
return (short)(b1 + b2*256);
}
int getLittleLong (byte*& p)
{
byte b1, b2, b3, b4;
b1 = *p++;
b2 = *p++;
b3 = *p++;
b4 = *p++;
return b1 + (b2<<8) + (b3<<16) + (b4<<24);
}
char getc(byte*& p)
{
return *p++;
}
/*
=========================================================
BMP LOADING
=========================================================
*/
typedef struct
{
char id[2];
unsigned long fileSize;
unsigned long reserved0;
unsigned long bitmapDataOffset;
unsigned long bitmapHeaderSize;
unsigned long width;
unsigned long height;
unsigned short planes;
unsigned short bitsPerPixel;
unsigned long compression;
unsigned long bitmapDataSize;
unsigned long hRes;
unsigned long vRes;
unsigned long colors;
unsigned long importantColors;
unsigned char palette[256][4];
} BMPHeader_t;
static void LoadBMP( const char *name, byte **pic, int *width, int *height )
{
int columns, rows, numPixels;
byte *pixbuf;
int row, column;
byte *buf_p;
byte *buffer;
unsigned int length;
BMPHeader_t bmpHeader;
byte *bmpRGBA;
*pic = NULL;
//
// load the file
//
length = LoadFile( ( char * ) name, (void **)&buffer);
if (length == -1)
{
length = PakLoadAnyFile( (char*)name, (void**)&buffer);
if (length == -1)
{
return;
}
}
buf_p = buffer;
bmpHeader.id[0] = *buf_p++;
bmpHeader.id[1] = *buf_p++;
bmpHeader.fileSize = LittleLong( * ( long * ) buf_p );
buf_p += 4;
bmpHeader.reserved0 = LittleLong( * ( long * ) buf_p );
buf_p += 4;
bmpHeader.bitmapDataOffset = LittleLong( * ( long * ) buf_p );
buf_p += 4;
bmpHeader.bitmapHeaderSize = LittleLong( * ( long * ) buf_p );
buf_p += 4;
bmpHeader.width = LittleLong( * ( long * ) buf_p );
buf_p += 4;
bmpHeader.height = LittleLong( * ( long * ) buf_p );
buf_p += 4;
bmpHeader.planes = LittleShort( * ( short * ) buf_p );
buf_p += 2;
bmpHeader.bitsPerPixel = LittleShort( * ( short * ) buf_p );
buf_p += 2;
bmpHeader.compression = LittleLong( * ( long * ) buf_p );
buf_p += 4;
bmpHeader.bitmapDataSize = LittleLong( * ( long * ) buf_p );
buf_p += 4;
bmpHeader.hRes = LittleLong( * ( long * ) buf_p );
buf_p += 4;
bmpHeader.vRes = LittleLong( * ( long * ) buf_p );
buf_p += 4;
bmpHeader.colors = LittleLong( * ( long * ) buf_p );
buf_p += 4;
bmpHeader.importantColors = LittleLong( * ( long * ) buf_p );
buf_p += 4;
memcpy( bmpHeader.palette, buf_p, sizeof( bmpHeader.palette ) );
if ( bmpHeader.bitsPerPixel == 8 )
buf_p += 1024;
if ( bmpHeader.id[0] != 'B' && bmpHeader.id[1] != 'M' )
{
Sys_Printf("LoadBMP: only Windows-style BMP files supported (%s)\n", name );
}
if ( bmpHeader.fileSize != length )
{
Sys_Printf("LoadBMP: header size does not match file size (%d vs. %d) (%s)\n", bmpHeader.fileSize, length, name );
}
if ( bmpHeader.compression != 0 )
{
Sys_Printf("LoadBMP: only uncompressed BMP files supported (%s)\n", name );
}
if ( bmpHeader.bitsPerPixel < 8 )
{
Sys_Printf("LoadBMP: monochrome and 4-bit BMP files not supported (%s)\n", name );
}
columns = bmpHeader.width;
rows = bmpHeader.height;
if ( rows < 0 )
rows = -rows;
numPixels = columns * rows;
if ( width )
*width = columns;
if ( height )
*height = rows;
bmpRGBA = reinterpret_cast<unsigned char*>(malloc( numPixels * 4 ));
*pic = bmpRGBA;
for ( row = rows-1; row >= 0; row-- )
{
pixbuf = bmpRGBA + row*columns*4;
for ( column = 0; column < columns; column++ )
{
unsigned char red, green, blue, alpha;
int palIndex;
unsigned short shortPixel;
switch ( bmpHeader.bitsPerPixel )
{
case 8:
palIndex = *buf_p++;
*pixbuf++ = bmpHeader.palette[palIndex][2];
*pixbuf++ = bmpHeader.palette[palIndex][1];
*pixbuf++ = bmpHeader.palette[palIndex][0];
*pixbuf++ = 0xff;
break;
case 16:
shortPixel = * ( unsigned short * ) pixbuf;
pixbuf += 2;
*pixbuf++ = ( shortPixel & ( 31 << 10 ) ) >> 7;
*pixbuf++ = ( shortPixel & ( 31 << 5 ) ) >> 2;
*pixbuf++ = ( shortPixel & ( 31 ) ) << 3;
*pixbuf++ = 0xff;
break;
case 24:
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = 255;
break;
case 32:
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
alpha = *buf_p++;
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = alpha;
break;
default:
Sys_Printf("LoadBMP: illegal pixel_size '%d' in file '%s'\n", bmpHeader.bitsPerPixel, name );
break;
}
}
}
free( buffer );
}
/*
=================================================================
PCX LOADING
=================================================================
*/
/*
==============
LoadPCX
==============
*/
static void LoadPCX ( const 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;
int xmax, ymax;
*pic = NULL;
*palette = NULL;
//
// load the file
//
len = LoadFile( ( char * ) filename, (void **)&raw);
if (len == -1)
{
len = PakLoadAnyFile( (char*)filename, (void**)&raw);
if (len == -1)
{
return;
}
}
//
// parse the PCX file
//
pcx = (pcx_t *)raw;
raw = &pcx->data;
xmax = LittleShort(pcx->xmax);
ymax = LittleShort(pcx->ymax);
if (pcx->manufacturer != 0x0a
|| pcx->version != 5
|| pcx->encoding != 1
|| pcx->bits_per_pixel != 8
|| xmax >= 1024
|| ymax >= 1024)
{
Sys_Printf ("Bad pcx file %s (%i x %i) (%i x %i)\n", filename, xmax+1, ymax+1, pcx->xmax, pcx->ymax);
return;
}
out = reinterpret_cast<unsigned char*>(malloc ( (ymax+1) * (xmax+1) ));
*pic = out;
pix = out;
if (palette)
{
*palette = reinterpret_cast<unsigned char*>(malloc(768));
memcpy (*palette, (byte *)pcx + len - 768, 768);
}
if (width)
*width = xmax+1;
if (height)
*height = ymax+1;
// FIXME: use bytes_per_line here?
for (y=0 ; y<=ymax ; y++, pix += xmax+1)
{
for (x=0 ; x<=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)
{
Sys_Printf ("PCX file %s was malformed", filename);
free (*pic);
*pic = NULL;
}
free(pcx);
}
/*
==============
LoadPCX32
==============
*/
static void LoadPCX32 ( const char *filename, byte **pic, int *width, int *height) {
byte *palette;
byte *pic8;
int i, c, p;
byte *pic32;
LoadPCX (filename, &pic8, &palette, width, height);
if (!pic8) {
*pic = NULL;
return;
}
c = (*width) * (*height);
pic32 = *pic = reinterpret_cast<unsigned char*>(malloc(4 * c ));
for (i = 0 ; i < c ; i++) {
p = pic8[i];
pic32[0] = palette[p*3];
pic32[1] = palette[p*3 + 1];
pic32[2] = palette[p*3 + 2];
pic32[3] = 255;
pic32 += 4;
}
free (pic8);
free (palette);
}
/*
=========================================================
TARGA LOADING
=========================================================
*/
/*
=============
LoadTGA
=============
*/
void LoadTGA ( const char *name, byte **pic, int *width, int *height)
{
int columns, rows, numPixels;
byte *pixbuf;
int row, column;
byte *buf_p;
byte *buffer;
TargaHeader targa_header;
byte *targa_rgba;
*pic = NULL;
//
// load the file
//
int nLen = LoadFile ( ( char * ) name, (void **)&buffer);
if (nLen == -1)
{
nLen = PakLoadAnyFile((char*)name, (void**)&buffer);
if (nLen == -1)
{
return;
}
}
buf_p = buffer;
targa_header.id_length = *buf_p++;
targa_header.colormap_type = *buf_p++;
targa_header.image_type = *buf_p++;
targa_header.colormap_index = LittleShort ( *(short *)buf_p );
buf_p += 2;
targa_header.colormap_length = LittleShort ( *(short *)buf_p );
buf_p += 2;
targa_header.colormap_size = *buf_p++;
targa_header.x_origin = LittleShort ( *(short *)buf_p );
buf_p += 2;
targa_header.y_origin = LittleShort ( *(short *)buf_p );
buf_p += 2;
targa_header.width = LittleShort ( *(short *)buf_p );
buf_p += 2;
targa_header.height = LittleShort ( *(short *)buf_p );
buf_p += 2;
targa_header.pixel_size = *buf_p++;
targa_header.attributes = *buf_p++;
//++timo debug
if (targa_header.pixel_size == 32)
Sys_Printf("%s is 32bit\n", name);
bool bAlphaOK = false;
if (targa_header.image_type!=2
&& targa_header.image_type!=10
&& targa_header.image_type != 3 )
{
Sys_Printf("LoadTGA: Only type 2 (RGB), 3 (gray), and 10 (RGB) TGA images supported\n");
}
if ( targa_header.colormap_type != 0 )
{
Sys_Printf("LoadTGA: colormaps not supported\n" );
}
if ( ( targa_header.pixel_size != 32 && targa_header.pixel_size != 24 ) && targa_header.image_type != 3 )
{
Sys_Printf("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 = reinterpret_cast<unsigned char*>(malloc (numPixels*4));
*pic = targa_rgba;
if (targa_header.id_length != 0)
buf_p += targa_header.id_length; // skip TARGA image comment
if ( targa_header.image_type==2 || targa_header.image_type == 3 )
{
// Uncompressed RGB or gray scale image
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 8:
blue = *buf_p++;
green = blue;
red = blue;
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = 255;
break;
case 24:
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = 255;
break;
case 32:
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
alphabyte = *buf_p++;
//++timo debug: detect if the whole alpha channel is 0
if (alphabyte != 0)
bAlphaOK = true;
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = alphabyte;
break;
default:
Sys_Printf("LoadTGA: illegal pixel_size '%d' in file '%s'\n", targa_header.pixel_size, name );
break;
}
}
}
//++timo debug
if (bAlphaOK)
Sys_Printf("alpha channel OK");
else
Sys_Printf("empty alpha channel!");
}
else if (targa_header.image_type==10) { // Runlength encoded RGB images
//++timo debug
Sys_Printf("runlength encode RGB image");
unsigned char red,green,blue,alphabyte,packetHeader,packetSize,j;
red = 0;
green = 0;
blue = 0;
alphabyte = 0xff;
for(row=rows-1; row>=0; row--) {
pixbuf = targa_rgba + row*columns*4;
for(column=0; column<columns; ) {
packetHeader= *buf_p++;
packetSize = 1 + (packetHeader & 0x7f);
if (packetHeader & 0x80) { // run-length packet
switch (targa_header.pixel_size) {
case 24:
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
alphabyte = 255;
break;
case 32:
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
alphabyte = *buf_p++;
break;
default:
Sys_Printf("LoadTGA: illegal pixel_size '%d' in file '%s'\n", targa_header.pixel_size, name );
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 = *buf_p++;
green = *buf_p++;
red = *buf_p++;
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = 255;
break;
case 32:
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
alphabyte = *buf_p++;
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = alphabyte;
break;
default:
Sys_Printf("LoadTGA: illegal pixel_size '%d' in file '%s'\n", targa_header.pixel_size, name );
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:;
}
}
free(buffer);
}
void LoadJPG( const char *filename, unsigned char **pic, int *width, int *height )
{
byte *fbuffer = NULL;
int nLen = LoadFile( ( char * ) filename, (void **)&fbuffer);
if (nLen == -1)
{
nLen = PakLoadAnyFile((char*)filename, (void**)&fbuffer);
if (nLen == -1)
{
return;
}
}
LoadJPGBuff(fbuffer, pic, width, height);
free(fbuffer);
}
//===================================================================
/*
=================
LoadImage
Loads any of the supported image types into a cannonical
32 bit format.
=================
*/
void LoadImage( const char *name, byte **pic, int *width, int *height )
{
int len;
*pic = NULL;
*width = 0;
*height = 0;
len = strlen(name);
if (len<5)
{
return;
}
if ( !stricmp( name+len-4, ".tga" ) )
{
LoadTGA( name, pic, width, height );
}
else if ( !stricmp(name+len-4, ".pcx") )
{
LoadPCX32( name, pic, width, height );
}
else if ( !stricmp( name+len-4, ".bmp" ) )
{
LoadBMP( name, pic, width, height );
}
else if ( !stricmp( name+len-4, ".jpg" ) )
{
LoadJPG( name, pic, width, height );
}
}
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