126 lines
2.1 KiB
C
126 lines
2.1 KiB
C
/*
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* tga.c
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*
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* Copyright (C) 2001-2002 Matthias Brueckner <matbrc@gmx.de>
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* This file is part of the TGA library (libtga).
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Library General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "tga.h"
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TGA*
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TGAOpen(char *file,
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char *mode)
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{
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TGA *tga;
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FILE *fd;
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tga = (TGA*)malloc(sizeof(TGA));
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if (!tga) {
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TGA_ERROR(tga, TGA_OOM);
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return NULL;
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}
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tga->off = 0;
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fd = fopen(file, mode);
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if (!fd) {
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TGA_ERROR(tga, TGA_OPEN_FAIL);
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free(tga);
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return NULL;
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}
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tga->fd = fd;
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tga->last = TGA_OK;
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return tga;
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}
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TGA*
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TGAOpenFd(FILE *fd)
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{
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TGA *tga;
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tga = (TGA*)malloc(sizeof(TGA));
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if (!tga) {
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TGA_ERROR(tga, TGA_OOM);
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return NULL;
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}
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if (!fd) {
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TGA_ERROR(tga, TGA_OPEN_FAIL);
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free(tga);
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return NULL;
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}
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tga->off = ftell(fd);
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if(tga->off == -1) {
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TGA_ERROR(tga, TGA_OPEN_FAIL);
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free(tga);
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return NULL;
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}
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tga->fd = fd;
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tga->last = TGA_OK;
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return tga;
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}
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void
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TGAClose(TGA *tga)
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{
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if (tga) {
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fclose(tga->fd);
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free(tga);
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}
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}
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char*
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TGAStrError(tuint8 code)
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{
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if (code >= TGA_ERRORS) code = TGA_ERROR;
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return tga_error_strings[code];
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}
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tlong
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__TGASeek(TGA *tga,
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tlong off,
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int whence)
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{
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fseek(tga->fd, off, whence);
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tga->off = ftell(tga->fd);
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return tga->off;
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}
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void
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__TGAbgr2rgb(tbyte *data,
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size_t size,
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size_t bytes)
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{
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size_t i;
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tbyte tmp;
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for (i = 0; i < size; i += bytes) {
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tmp = data[i];
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data[i] = data[i + 2];
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data[i + 2] = tmp;
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}
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}
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