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TGA2DUMP.C
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C/C++ Source or Header
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1991-05-16
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5KB
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183 lines
/***************************************************************
TGA2DUMP.C - Converts a Targa-16/24/32 file to a DKB/QRT "Dump"
format raw file.
Version 1.1 By Aaron A. Collins, written on 1/1/91
Version 1.2 By Aaron A. Collins, revised on 5/1/91
Version 1.3 By Aaron A. Collins, revised on 5/15/91
This file is released to the Public Domain.
**************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifndef TRUE
#define TRUE 1
#define FALSE 0
#endif
#define MAXXRES 2048 /* huge max x resolution allowable, infinite y res. */
write_line(int, FILE *, int);
unsigned char linbuf[MAXXRES * 3];
void main(argc,argv)
int argc;
char *argv[];
{
register int xres, yres, xhi, yhi;
register int y, pixelsize, filetype;
FILE *in, *out;
printf("\n\nTarga-16/24/32 Image File to DKB/QRT Dump Format Converter\n");
printf("Version 1.3 By Aaron A. Collins. Written 1/1/91 Revised 5/15/91\n\n");
if (argc != 3)
{
printf("Usage: %s InputFile OutputFile\n\n",argv[0]);
exit(1);
}
if ((in = fopen(argv[1], "rb")) == NULL) /* try opening input file */
{
printf("ERROR - Couldn't open file %s\n", argv[1]);
exit(1);
}
if ((out = fopen(argv[2], "wb")) == NULL)
{
printf("ERROR - Couldn't create file %s\n", argv[2]);
fclose(in);
exit(1);
}
/** absorb 1st part of Targa header **/
fgetc(in); /* absorb 2 0's */
fgetc(in);
if ((filetype = fgetc(in)) != 2) /* Uncompressed, Unmapped TGA only */
{
printf("\nInvalid Targa File Type %d (Must be 2) - Aborting!\n\n", filetype);
fclose(in); /* close all files */
fclose(out);
unlink(argv[2]);
exit(1);
}
for (y = 0; y < 9; y++) /* discard 7 0's and file X/Y origin */
fgetc(in);
/** load x and y resolution from input Targa file while copying **/
xres = fputc(fgetc(in), out); /* lo order */
xhi = fputc(fgetc(in), out); /* hi order */
xres += ((unsigned int) xhi) << 8;
if (xres > MAXXRES) /* too big? */
{
printf("ERROR - X res. of %s (%d) exceeds maximum (%d)!\n", argv[1], xres, MAXXRES);
fclose(in); /* close all files */
fclose(out);
unlink(argv[2]); /* delete empty out files */
exit(1);
}
yres = fputc(fgetc(in), out); /* now do yres the same... */
yhi = fputc(fgetc(in), out);
yres += ((unsigned int) yhi) << 8;
pixelsize = fgetc(in); /* discard bits/pixel and display order */
fgetc(in); /* assume top-down display order */
if (pixelsize != 16 && pixelsize != 24 && pixelsize != 32)
{
printf("\nInvalid Targa File Pixel Size %d (must be 16,24,32) - Aborting!\n\n", pixelsize);
fclose(in); /* close all files */
fclose(out);
unlink(argv[2]);
exit(1);
}
printf("Input file = %s\n", argv[1]); /* show stats */
printf("Bits per pixel = %d\n", pixelsize);
printf("Output file = %s\n", argv[2]);
printf("Image X resolution = %d\n", xres);
printf("Image Y resolution = %d\n", yres);
printf("\nProcessing Line: 0");
for (y = 0; y < yres; y++) /* for every line in the in file */
{
printf("\b\b\b%3d", y); /* disp. current line # */
if (feof(in)) /* stop if file truncated */
break;
fread(linbuf, 1, xres * (pixelsize/8), in); /* read a line */
fputc(y & 0x00ff, out); /* write line # out */
fputc((y & 0xff00) >> 8, out);
if (write_line(xres, out, pixelsize))
{
printf("File output error on %s. Disk Full?\n", argv[2]);
fclose(in);
fflush(out);
fclose(out);
exit(1);
}
}
printf("\n");
fclose(in); /* close all files */
fflush(out);
fclose(out);
exit(0);
}
write_line(xres, out, pixelsize)
int xres, pixelsize;
FILE *out;
{
register int idx, x;
register unsigned int tmp_byte;
switch (pixelsize) /* Pixel ordering for Targa-16/24/32 files */
{
case 16:
for (x = 0, idx = 1; x < xres; x++, idx += 2)
fputc((linbuf[idx] & 0x7C) << 1, out); /* write Red */
for (x = 0, idx = 0; x < xres; x++, idx += 2)
{
tmp_byte = (linbuf[idx] & 0xE0) >> 2;
tmp_byte |= (linbuf[idx + 1] & 0x03) << 6;
fputc(tmp_byte, out); /* write line of Green */
}
for (x = 0, idx = 0; x < xres; x++, idx += 2)
fputc((linbuf[idx] & 0x1F) << 3, out); /* write Blue */
break;
case 24:
for (x = 0, idx = 2; x < xres; x++, idx += 3)
fputc(linbuf[idx], out); /* write line of Red */
for (x = 0, idx = 1; x < xres; x++, idx += 3)
fputc(linbuf[idx], out); /* write line of Green */
for (x = 0, idx = 0; x < xres; x++, idx += 3)
fputc(linbuf[idx], out); /* write line of Blue */
break;
case 32:
for (x = 0, idx = 2; x < xres; x++, idx += 4)
fputc(linbuf[idx], out); /* write line of Red */
for (x = 0, idx = 1; x < xres; x++, idx += 4)
fputc(linbuf[idx], out); /* write line of Green */
for (x = 0, idx = 0; x < xres; x++, idx += 4)
fputc(linbuf[idx], out); /* write line of Blue */
break;
}
return(ferror(out));
}