--- /dev/null
+/*
+===========================================================================
+Copyright (C) 1997-2006 Id Software, Inc.
+
+This file is part of Quake 2 Tools source code.
+
+Quake 2 Tools 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 2 Tools 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 Quake 2 Tools source code; 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 "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 = 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;
+ 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 = 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_strcasecmp (ext, "lbm"))
+ {
+ LoadLBM (name, pixels, palette);
+ if (width)
+ *width = bmhd.w;
+ if (height)
+ *height = bmhd.h;
+ }
+ else if (!Q_strcasecmp (ext, "pcx"))
+ {
+ 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_strcasecmp (ext, "lbm"))
+ {
+ WriteLBMfile (name, pixels, width, height, palette);
+ }
+ else if (!Q_strcasecmp (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 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:;
+ }
+ }
+
+ fclose(fin);
+}
projects / xonotic / netradiant.git / blobdiff