diff options
Diffstat (limited to 'apps/graphics/traveler/src/trv_bitmapfile.c')
| -rw-r--r-- | apps/graphics/traveler/src/trv_bitmapfile.c | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/apps/graphics/traveler/src/trv_bitmapfile.c b/apps/graphics/traveler/src/trv_bitmapfile.c new file mode 100644 index 000000000..834c0bd77 --- /dev/null +++ b/apps/graphics/traveler/src/trv_bitmapfile.c @@ -0,0 +1,232 @@ +/******************************************************************************* + * 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 <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) +{ + char filename[FILENAME_MAX]; + int mapndx; + int ret = OK; + + /* Discard any bitmaps that we may currently have buffered */ + + trv_free_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; + } + + g_even_bitmaps[mapndx] = trv_read_texture(filename); + 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 + g_odd_bitmaps[mapndx] = trv_read_texture(filename); + 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 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); + if (ret < 0) + { + trv_free_bitmaps(); + } + + /* We are all done with the file, so close it */ + + fclose(fp); + return ret; +} + |