88 lines
2.6 KiB
Text
88 lines
2.6 KiB
Text
|
/*
|
||
|
|
This is a Optical-Character-Recognition program
|
||
|
|
Copyright (C) 1999 Joerg Schulenburg
|
||
|
|
|
||
|
|
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 README for EMAIL-address
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <assert.h>
|
||
|
|
|
||
|
|
#include "tga.h"
|
||
|
|
|
||
|
|
typedef unsigned char byte;
|
||
|
|
|
||
|
|
// --- needed for reading TGA-files
|
||
|
|
#if 0
|
||
|
|
char read_b(FILE *f1){ // filter #-comments
|
||
|
|
char c;
|
||
|
|
c=fgetc(f1); assert(!feof(f1)); assert(!ferror(f1));
|
||
|
|
return c;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
//byte tga[18]={ 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,24,32};
|
||
|
|
/* header_hex= 00 00 02 00 00 00 00 00 00 00 00 00 xl xh yl yh
|
||
|
|
* 18 20 -- -- -- -- -- -- -- -- -- -- -- -- -- -- */
|
||
|
|
|
||
|
|
void readtga(char *name,pix *p,int mode){ // see pcx.format.txt
|
||
|
|
// mode: 0=gray,1=RGB
|
||
|
|
int nx,ny,i,x,y;
|
||
|
|
FILE *f1;
|
||
|
|
unsigned char *pic,h[18];
|
||
|
|
|
||
|
|
f1=fopen(name,"rb"); if(!f1) fprintf(stderr," error opening file\n");
|
||
|
|
assert(f1); // open-error
|
||
|
|
assert(fread(h,1,18,f1)==18); /* 18 Byte lesen -> h[] */
|
||
|
|
assert(h[ 0]== 0); // TGA0
|
||
|
|
assert(h[ 1]== 0); // TGA1
|
||
|
|
assert(h[ 2]== 2); // TGA2 no run length encoding
|
||
|
|
for(i=3;i<12;i++)
|
||
|
|
assert(h[ i]== 0); // ???
|
||
|
|
assert(h[16]==0x18); // TGA16
|
||
|
|
assert(h[17]==0x20); // TGA17
|
||
|
|
nx = h[12] + (h[13]<<8); /* x-dimension low high */
|
||
|
|
ny = h[14] + (h[15]<<8); /* y-dimension low high */
|
||
|
|
fprintf(stderr,"# TGA version=%d x=%d y=%d", h[2],nx,ny );
|
||
|
|
fflush(stdout);
|
||
|
|
pic=(unsigned char *)malloc( 3*nx*ny );
|
||
|
|
assert(pic!=NULL); // no memory
|
||
|
|
assert(ny==(int)fread(pic,3*nx,ny,f1)); // read all lines BGR
|
||
|
|
if(mode==0)
|
||
|
|
{
|
||
|
|
for(y=0;y<ny;y++) /* BGR => gray */
|
||
|
|
for(x=0;x<nx;x++)
|
||
|
|
{ i=x+y*nx; pic[i]=(pic[i*3+0]+pic[i*3+1]+pic[i*3+2])/3; }
|
||
|
|
}
|
||
|
|
else
|
||
|
|
if(mode==1)
|
||
|
|
{
|
||
|
|
byte b;
|
||
|
|
for(y=0;y<ny;y++) /* BGR => RGB */
|
||
|
|
for(x=0;x<nx;x++)
|
||
|
|
{ i=x+y*nx; b=pic[i*3+0]; pic[i*3+0]=pic[i*3+2]; pic[i*3+2]=b; }
|
||
|
|
}
|
||
|
|
else assert(0); // wrong mode
|
||
|
|
fclose(f1);
|
||
|
|
p->p=pic; p->x=nx; p->y=ny; p->bpp=1+2*mode;
|
||
|
|
fprintf(stderr," mode=%d\n",mode);
|
||
|
|
}
|
||
|
|
|
||
|
|
// ------------------------------------------------------------------------
|
||
|
|
|