/*******************************************************************************
* apps/graphics/traveler/src/trv_bitmapfile.c
* This file contains the logic which loads texture bitmaps
*
* Copyright (C) 2014 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included files
****************************************************************************/
#include "trv_types.h"
#include "trv_mem.h"
#include "trv_world.h"
#include "trv_bitmaps.h"
#include "trv_fsutils.h"
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <errno.h>
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: trv_read_filename
*
* Description:
* Read a file name from the input stream
*
***************************************************************************/
static int trv_read_filename(FAR FILE *fp, FAR char *filename)
{
int16_t nbytes;
int ch;
/* Skip over any leading whitespace */
do
{
ch = getc(fp);
}
while (isspace(ch));
if (ch == EOF)
{
return -ENOENT;
}
/* Get the file name from the file */
nbytes = 0;
for (;;)
{
/* Everything up to the next whitespace must be the filename */
if (isspace(ch) || ch == EOF)
{
/* End of the string. Don't forget the ASCIIZ terminator */
filename[nbytes] = '\0';
break;
}
/* Make sure that the file name is not too large */
else if (nbytes >= FILENAME_MAX)
{
return -E2BIG;
}
/* Add the new character to the file name */
else
{
filename[nbytes] = (char)ch;
nbytes++;
}
/* Get the character for the next time through the loop. Every file
* name should be terminated with a space or a new line (or, possibily,
* EOF)
*/
ch = getc(fp);
}
return OK;
}
/****************************************************************************
* Name: trv_load_bitmaps
*
* Description:
* This function loads the world data from the input file
*
***************************************************************************/
static int trv_load_bitmaps(FAR FILE *fp, FAR const char *wldpath)
{
FAR char *fullpath;
char filename[FILENAME_MAX];
int mapndx;
int ret = OK;
/* Discard any bitmaps that we may currently have buffered */
trv_release_bitmaps();
/* Get the number of bitmaps in the bitmap file */
g_trv_nbitmaps = trv_read_decimal(fp);
if (g_trv_nbitmaps >= MAX_BITMAPS)
{
return -E2BIG;
}
/* Read the colors used to rend the sky and ground */
g_sky_color = trv_read_decimal(fp);
g_ground_color = trv_read_decimal(fp);
/* Load each bitmap file */
for (mapndx = 0; mapndx < g_trv_nbitmaps && ret == OK; mapndx++)
{
/* Load the even bitmap */
/* Get the name of the file which contains the even bitmap */
ret = trv_read_filename(fp, filename);
if (ret < 0)
{
return ret;
}
/* Get the full path to the even bit map file */
fullpath = trv_fullpath(wldpath, filename);
/* Read the bitmap texture file */
g_even_bitmaps[mapndx] = trv_read_texture(fullpath);
free(fullpath);
if (!g_even_bitmaps[mapndx])
{
return -EIO;
}
/* Load the odd bitmap */
/* Get the name of the file which contains the odd bitmap */
ret = trv_read_filename(fp, filename);
if (ret < 0)
{
return ret;
}
#ifndef WEDIT
/* Get the full path to the even bit map file */
fullpath = trv_fullpath(wldpath, filename);
/* Read the bitmap texture file */
g_odd_bitmaps[mapndx] = trv_read_texture(fullpath);
free(fullpath);
if (!g_odd_bitmaps[mapndx])
{
return -EIO;
}
#endif
}
return ret;
}
/****************************************************************************
* Public Functions
***************************************************************************/
/****************************************************************************
* Name: trv_load_bitmapfile
*
* Description:
* This function opens the input file and loads the world data from it
*
***************************************************************************/
int trv_load_bitmapfile(FAR const char *bitmapfile, FAR const char *wldpath)
{
FAR FILE *fp;
int ret;
/* Open the file which contains the names of all of the bitmap files */
fp = fopen(bitmapfile, "r");
if (!fp)
{
int errcode = errno;
return -errcode;
}
/* Load all of the bitmaps */
ret = trv_load_bitmaps(fp, wldpath);
if (ret < 0)
{
trv_release_bitmaps();
}
/* We are all done with the file, so close it */
fclose(fp);
return ret;
}
