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gtkradiant/tools/quake3/common/imagelib.c
Forest Hale 88cea027e6 ported over the 1.5 branch version of q3map2 which is newer 
made Visual Studio files work in VS2005 Express
fixed a ton of warnings in VS2005 Express
fixed some compile problems on OpenSUSE 11.0


git-svn-id: svn://svn.icculus.org/gtkradiant/GtkRadiant/trunk@302 8a3a26a2-13c4-0310-b231-cf6edde360e5
2008-07-25 07:31:37 +00:00

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/*
Copyright (C) 1999-2007 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
*/
// imagelib.c
#include "inout.h"
#include "cmdlib.h"
#include "imagelib.h"
#include "vfs.h"
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);
}
int bufLittleShort (byte *buf, int len, int *pos)
{
byte b1, b2;
if ((len - *pos) < 2)
Error ("Unexpected buffer end");
b1 = buf[*pos]; *pos += 1;
b2 = buf[*pos]; *pos += 1;
return (short)(b1 + b2*256);
}
int bufLittleLong (byte *buf, int len, int *pos)
{
byte b1, b2, b3, b4;
if ((len - *pos) < 4)
Error ("Unexpected buffer end");
b1 = buf[*pos]; *pos += 1;
b2 = buf[*pos]; *pos += 1;
b3 = buf[*pos]; *pos += 1;
b4 = buf[*pos]; *pos += 1;
return b1 + (b2<<8) + (b3<<16) + (b4<<24);
}
/*
============================================================================
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 (const 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 = safe_malloc (768);
memset (cmapbuffer, 0, 768);
memcpy (cmapbuffer, LBM_P, chunklength);
break;
case BODYID:
body_p = LBM_P;
pic_p = picbuffer = safe_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 (const 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 = safe_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
==============
*/
/* RR2DO2 */
#define DECODEPCX( b, d, r ) d=*b++;if((d&0xC0)==0xC0){r=d&0x3F;d=*b++;}else{r=1;}
void LoadPCX( const char *filename, byte **pic, byte **palette, int *width, int *height )
{
byte *raw;
pcx_t *pcx;
int x, y, lsize;
int len;
int dataByte, runLength;
byte *out, *pix;
/* load the file */
len = vfsLoadFile (filename, (void **)&raw, 0);
if( len == -1 )
Error( "LoadPCX: Couldn't read %s", filename );
/* 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 = safe_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 = safe_malloc ( (pcx->ymax+1) * (pcx->xmax+1) );
if (!out)
Error( "LoadPCX: couldn't allocate");
*pic = out;
pix = out;
/* RR2DO2: pcx fix */
lsize = pcx->color_planes * pcx->bytes_per_line;
/* go scanline by scanline */
for( y = 0; y <= pcx->ymax; y++, pix += pcx->xmax + 1 )
{
/* do a scanline */
for( x=0; x <= pcx->xmax; )
{
/* RR2DO2 */
DECODEPCX( raw, dataByte, runLength );
while( runLength-- > 0 )
pix[ x++ ] = dataByte;
}
/* RR2DO2: discard any other data */
while( x < lsize )
{
DECODEPCX( raw, dataByte, runLength );
x++;
}
while( runLength-- > 0 )
x++;
}
/* validity check */
if( raw - (byte *) pcx > len)
Error( "PCX file %s was malformed", filename );
free( pcx );
}
/*
==============
WritePCXfile
==============
*/
void WritePCXfile (const char *filename, byte *data,
int width, int height, byte *palette)
{
int i, j, length;
pcx_t *pcx;
byte *pack;
pcx = safe_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(1); // 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 BMP
============================================================================
*/
/*
// we can't just use these structures, because
// compiler structure alignment will not be portable
// on this unaligned stuff
typedef struct tagBITMAPFILEHEADER { // bmfh
WORD bfType; // BM
DWORD bfSize;
WORD bfReserved1;
WORD bfReserved2;
DWORD bfOffBits;
} BITMAPFILEHEADER;
typedef struct tagBITMAPINFOHEADER{ // bmih
DWORD biSize;
LONG biWidth;
LONG biHeight;
WORD biPlanes;
WORD biBitCount
DWORD biCompression;
DWORD biSizeImage;
LONG biXPelsPerMeter;
LONG biYPelsPerMeter;
DWORD biClrUsed;
DWORD biClrImportant;
} BITMAPINFOHEADER;
typedef struct tagBITMAPINFO { // bmi
BITMAPINFOHEADER bmiHeader;
RGBQUAD bmiColors[1];
} BITMAPINFO;
typedef struct tagBITMAPCOREHEADER { // bmch
DWORD bcSize;
WORD bcWidth;
WORD bcHeight;
WORD bcPlanes;
WORD bcBitCount;
} BITMAPCOREHEADER;
typedef struct _BITMAPCOREINFO { // bmci
BITMAPCOREHEADER bmciHeader;
RGBTRIPLE bmciColors[1];
} BITMAPCOREINFO;
*/
/*
==============
LoadBMP
==============
*/
void LoadBMP (const char *filename, byte **pic, byte **palette, int *width, int *height)
{
byte *out;
int i;
int bfSize;
int bfOffBits;
int structSize;
int bcWidth;
int bcHeight;
int bcPlanes;
int bcBitCount;
byte bcPalette[1024];
qboolean flipped;
byte *in;
int len, pos = 0;
len = vfsLoadFile (filename, (void **)&in, 0);
if (len == -1)
{
Error ("Couldn't read %s", filename);
}
i = bufLittleShort (in, len, &pos);
if (i != 'B' + ('M'<<8) ) {
Error ("%s is not a bmp file", filename);
}
bfSize = bufLittleLong (in, len, &pos);
bufLittleShort(in, len, &pos);
bufLittleShort(in, len, &pos);
bfOffBits = bufLittleLong (in, len, &pos);
// the size will tell us if it is a
// bitmapinfo or a bitmapcore
structSize = bufLittleLong (in, len, &pos);
if (structSize == 40)
{
// bitmapinfo
bcWidth = bufLittleLong(in, len, &pos);
bcHeight= bufLittleLong(in, len, &pos);
bcPlanes = bufLittleShort(in, len, &pos);
bcBitCount = bufLittleShort(in, len, &pos);
pos += 24;
if (palette)
{
memcpy (bcPalette, in+pos, 1024);
pos += 1024;
*palette = safe_malloc(768);
for (i = 0 ; i < 256 ; i++)
{
(*palette)[i * 3 + 0] = bcPalette[i * 4 + 2];
(*palette)[i * 3 + 1] = bcPalette[i * 4 + 1];
(*palette)[i * 3 + 2] = bcPalette[i * 4 + 0];
}
}
}
else if (structSize == 12)
{
// bitmapcore
bcWidth = bufLittleShort(in, len, &pos);
bcHeight= bufLittleShort(in, len, &pos);
bcPlanes = bufLittleShort(in, len, &pos);
bcBitCount = bufLittleShort(in, len, &pos);
if (palette)
{
memcpy (bcPalette, in+pos, 768);
pos += 768;
*palette = safe_malloc(768);
for (i = 0 ; i < 256 ; i++) {
(*palette)[i * 3 + 0] = bcPalette[i * 3 + 2];
(*palette)[i * 3 + 1] = bcPalette[i * 3 + 1];
(*palette)[i * 3 + 2] = bcPalette[i * 3 + 0];
}
}
} else {
Error ("%s had strange struct size", filename);
}
if (bcPlanes != 1) {
Error ("%s was not a single plane image", filename);
}
if (bcBitCount != 8) {
Error ("%s was not an 8 bit image", filename);
}
if (bcHeight < 0) {
bcHeight = -bcHeight;
flipped = qtrue;
} else {
flipped = qfalse;
}
if (width)
*width = bcWidth;
if (height)
*height = bcHeight;
if (!pic) {
free (in);
return;
}
out = safe_malloc ( bcWidth * bcHeight );
*pic = out;
pos = bfOffBits;
if (flipped) {
for (i = 0 ; i < bcHeight ; i++) {
memcpy (out + bcWidth * (bcHeight - 1 - i), in+pos, bcWidth);
pos += bcWidth;
}
} else {
memcpy (out, in+pos, bcWidth*bcHeight);
pos += bcWidth*bcHeight;
}
free (in);
}
/*
============================================================================
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 (const char *name, byte **pixels, byte **palette, int *width, int *height)
{
char ext[128];
ExtractFileExtension (name, ext);
if (!Q_stricmp (ext, "lbm"))
{
LoadLBM (name, pixels, palette);
if (width)
*width = bmhd.w;
if (height)
*height = bmhd.h;
}
else if (!Q_stricmp (ext, "pcx"))
{
LoadPCX (name, pixels, palette, width, height);
}
else if (!Q_stricmp (ext, "bmp"))
{
LoadBMP (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 (const char *name, byte *pixels, byte *palette,
int width, int height)
{
char ext[128];
ExtractFileExtension (name, ext);
if (!Q_stricmp (ext, "lbm"))
{
WriteLBMfile (name, pixels, width, height, palette);
}
else if (!Q_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;
void TargaError(TargaHeader *t, const char *message)
{
Sys_Printf("%s\n:TargaHeader:\nuint8 id_length = %i;\nuint8 colormap_type = %i;\nuint8 image_type = %i;\nuint16 colormap_index = %i;\nuint16 colormap_length = %i;\nuint8 colormap_size = %i;\nuint16 x_origin = %i;\nuint16 y_origin = %i;\nuint16 width = %i;\nuint16 height = %i;\nuint8 pixel_size = %i;\nuint8 attributes = %i;\n", message, t->id_length, t->colormap_type, t->image_type, t->colormap_index, t->colormap_length, t->colormap_size, t->x_origin, t->y_origin, t->width, t->height, t->pixel_size, t->attributes);
}
/*
=============
LoadTGABuffer
=============
*/
void LoadTGABuffer (const byte *f, const byte *enddata, byte **pic, int *width, int *height)
{
int x, y, row_inc, compressed, readpixelcount, red, green, blue, alpha, runlen, pindex, alphabits, image_width, image_height;
byte *pixbuf, *image_rgba;
const byte *fin;
unsigned char *p;
TargaHeader targa_header;
unsigned char palette[256*4];
*pic = NULL;
// abort if it is too small to parse
if (enddata - f < 19)
return;
targa_header.id_length = f[0];
targa_header.colormap_type = f[1];
targa_header.image_type = f[2];
targa_header.colormap_index = f[3] + f[4] * 256;
targa_header.colormap_length = f[5] + f[6] * 256;
targa_header.colormap_size = f[7];
targa_header.x_origin = f[8] + f[9] * 256;
targa_header.y_origin = f[10] + f[11] * 256;
targa_header.width = image_width = f[12] + f[13] * 256;
targa_header.height = image_height = f[14] + f[15] * 256;
targa_header.pixel_size = f[16];
targa_header.attributes = f[17];
// advance to end of header
fin = f + 18;
// skip TARGA image comment (usually 0 bytes)
fin += targa_header.id_length;
// read/skip the colormap if present (note: according to the TARGA spec it
// can be present even on truecolor or greyscale images, just not used by
// the image data)
if (targa_header.colormap_type)
{
if (targa_header.colormap_length > 256)
{
TargaError(&targa_header, "LoadTGA: only up to 256 colormap_length supported\n");
return;
}
if (targa_header.colormap_index)
{
TargaError(&targa_header, "LoadTGA: colormap_index not supported\n");
return;
}
if (targa_header.colormap_size == 24)
{
for (x = 0;x < targa_header.colormap_length;x++)
{
palette[x*4+2] = *fin++;
palette[x*4+1] = *fin++;
palette[x*4+0] = *fin++;
palette[x*4+3] = 255;
}
}
else if (targa_header.colormap_size == 32)
{
for (x = 0;x < targa_header.colormap_length;x++)
{
palette[x*4+2] = *fin++;
palette[x*4+1] = *fin++;
palette[x*4+0] = *fin++;
palette[x*4+3] = *fin++;
}
}
else
{
TargaError(&targa_header, "LoadTGA: Only 32 and 24 bit colormap_size supported\n");
return;
}
}
// check our pixel_size restrictions according to image_type
if (targa_header.image_type == 2 || targa_header.image_type == 10)
{
if (targa_header.pixel_size != 24 && targa_header.pixel_size != 32)
{
TargaError(&targa_header, "LoadTGA: only 24bit and 32bit pixel sizes supported for type 2 and type 10 images\n");
return;
}
}
else if (targa_header.image_type == 1 || targa_header.image_type == 9)
{
if (targa_header.pixel_size != 8)
{
TargaError(&targa_header, "LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
return;
}
}
else if (targa_header.image_type == 3 || targa_header.image_type == 11)
{
if (targa_header.pixel_size != 8)
{
TargaError(&targa_header, "LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
return;
}
}
else
{
TargaError(&targa_header, "LoadTGA: Only type 1, 2, 3, 9, 10, and 11 targa RGB images supported");
return;
}
if (targa_header.attributes & 0x10)
{
TargaError(&targa_header, "LoadTGA: origin must be in top left or bottom left, top right and bottom right are not supported\n");
return;
}
// number of attribute bits per pixel, we only support 0 or 8
alphabits = targa_header.attributes & 0x0F;
if (alphabits != 8 && alphabits != 0)
{
TargaError(&targa_header, "LoadTGA: only 0 or 8 attribute (alpha) bits supported\n");
return;
}
image_rgba = safe_malloc(image_width * image_height * 4);
if (!image_rgba)
{
Sys_Printf("LoadTGA: not enough memory for %i by %i image\n", image_width, image_height);
return;
}
// If bit 5 of attributes isn't set, the image has been stored from bottom to top
if ((targa_header.attributes & 0x20) == 0)
{
pixbuf = image_rgba + (image_height - 1)*image_width*4;
row_inc = -image_width*4*2;
}
else
{
pixbuf = image_rgba;
row_inc = 0;
}
compressed = targa_header.image_type == 9 || targa_header.image_type == 10 || targa_header.image_type == 11;
x = 0;
y = 0;
red = green = blue = alpha = 255;
while (y < image_height)
{
// decoder is mostly the same whether it's compressed or not
readpixelcount = 1000000;
runlen = 1000000;
if (compressed && fin < enddata)
{
runlen = *fin++;
// high bit indicates this is an RLE compressed run
if (runlen & 0x80)
readpixelcount = 1;
runlen = 1 + (runlen & 0x7f);
}
while((runlen--) && y < image_height)
{
if (readpixelcount > 0)
{
readpixelcount--;
red = green = blue = alpha = 255;
if (fin < enddata)
{
switch(targa_header.image_type)
{
case 1:
case 9:
// colormapped
pindex = *fin++;
if (pindex >= targa_header.colormap_length)
pindex = 0; // error
p = palette + pindex * 4;
red = p[0];
green = p[1];
blue = p[2];
alpha = p[3];
break;
case 2:
case 10:
// BGR or BGRA
blue = *fin++;
if (fin < enddata)
green = *fin++;
if (fin < enddata)
red = *fin++;
if (targa_header.pixel_size == 32 && fin < enddata)
alpha = *fin++;
break;
case 3:
case 11:
// greyscale
red = green = blue = *fin++;
break;
}
if (!alphabits)
alpha = 255;
}
}
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = alpha;
x++;
if (x == image_width)
{
// end of line, advance to next
x = 0;
y++;
pixbuf += row_inc;
}
}
}
*pic = image_rgba;
if (width)
*width = image_width;
if (height)
*height = image_height;
}
/*
=============
LoadTGA
=============
*/
void LoadTGA (const char *name, byte **pixels, int *width, int *height)
{
byte *buffer;
int nLen;
//
// load the file
//
nLen = vfsLoadFile ( ( char * ) name, (void **)&buffer, 0);
if (nLen == -1)
{
Error ("Couldn't read %s", name);
}
LoadTGABuffer(buffer, buffer + nLen, pixels, width, height);
}
/*
================
WriteTGA
================
*/
void WriteTGA (const char *filename, byte *data, int width, int height) {
byte *buffer;
int i;
int c;
FILE *f;
buffer = safe_malloc(width*height*4 + 18);
memset (buffer, 0, 18);
buffer[2] = 2; // uncompressed type
buffer[12] = width&255;
buffer[13] = width>>8;
buffer[14] = height&255;
buffer[15] = height>>8;
buffer[16] = 32; // pixel size
// swap rgb to bgr
c = 18 + width * height * 4;
for (i=18 ; i<c ; i+=4)
{
buffer[i] = data[i-18+2]; // blue
buffer[i+1] = data[i-18+1]; // green
buffer[i+2] = data[i-18+0]; // red
buffer[i+3] = data[i-18+3]; // alpha
}
f = fopen (filename, "wb");
fwrite (buffer, 1, c, f);
fclose (f);
free (buffer);
}
/*
============================================================================
LOAD32BITIMAGE
============================================================================
*/
/*
==============
Load32BitImage
Any of the return pointers can be NULL if you don't want them.
==============
*/
void Load32BitImage (const char *name, unsigned **pixels, int *width, int *height)
{
char ext[128];
byte *palette;
byte *pixels8;
byte *pixels32;
int size;
int i;
int v;
ExtractFileExtension (name, ext);
if (!Q_stricmp (ext, "tga")) {
LoadTGA (name, (byte **)pixels, width, height);
} else {
Load256Image (name, &pixels8, &palette, width, height);
if (!pixels) {
return;
}
size = *width * *height;
pixels32 = safe_malloc(size * 4);
*pixels = (unsigned *)pixels32;
for (i = 0 ; i < size ; i++) {
v = pixels8[i];
pixels32[i*4 + 0] = palette[ v * 3 + 0 ];
pixels32[i*4 + 1] = palette[ v * 3 + 1 ];
pixels32[i*4 + 2] = palette[ v * 3 + 2 ];
pixels32[i*4 + 3] = 0xff;
}
}
}
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