Home | History | Annotate | Download | only in gregbook 
      1 /*---------------------------------------------------------------------------
      2 
      3    wpng - simple PNG-writing program                             writepng.h
      4 
      5   ---------------------------------------------------------------------------
      6 
      7       Copyright (c) 1998-2007 Greg Roelofs.  All rights reserved.
      8 
      9       This software is provided "as is," without warranty of any kind,
     10       express or implied.  In no event shall the author or contributors
     11       be held liable for any damages arising in any way from the use of
     12       this software.
     13 
     14       The contents of this file are DUAL-LICENSED.  You may modify and/or
     15       redistribute this software according to the terms of one of the
     16       following two licenses (at your option):
     17 
     18 
     19       LICENSE 1 ("BSD-like with advertising clause"):
     20 
     21       Permission is granted to anyone to use this software for any purpose,
     22       including commercial applications, and to alter it and redistribute
     23       it freely, subject to the following restrictions:
     24 
     25       1. Redistributions of source code must retain the above copyright
     26          notice, disclaimer, and this list of conditions.
     27       2. Redistributions in binary form must reproduce the above copyright
     28          notice, disclaimer, and this list of conditions in the documenta-
     29          tion and/or other materials provided with the distribution.
     30       3. All advertising materials mentioning features or use of this
     31          software must display the following acknowledgment:
     32 
     33             This product includes software developed by Greg Roelofs
     34             and contributors for the book, "PNG: The Definitive Guide,"
     35             published by O'Reilly and Associates.
     36 
     37 
     38       LICENSE 2 (GNU GPL v2 or later):
     39 
     40       This program is free software; you can redistribute it and/or modify
     41       it under the terms of the GNU General Public License as published by
     42       the Free Software Foundation; either version 2 of the License, or
     43       (at your option) any later version.
     44 
     45       This program is distributed in the hope that it will be useful,
     46       but WITHOUT ANY WARRANTY; without even the implied warranty of
     47       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     48       GNU General Public License for more details.
     49 
     50       You should have received a copy of the GNU General Public License
     51       along with this program; if not, write to the Free Software Foundation,
     52       Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
     53 
     54   ---------------------------------------------------------------------------*/
     55 
     56 #ifndef TRUE
     57 #  define TRUE 1
     58 #  define FALSE 0
     59 #endif
     60 
     61 #ifndef MAX
     62 #  define MAX(a,b)  ((a) > (b)? (a) : (b))
     63 #  define MIN(a,b)  ((a) < (b)? (a) : (b))
     64 #endif
     65 
     66 #ifdef DEBUG
     67 #  define Trace(x)  {fprintf x ; fflush(stderr); fflush(stdout);}
     68 #else
     69 #  define Trace(x)  ;
     70 #endif
     71 
     72 #define TEXT_TITLE    0x01
     73 #define TEXT_AUTHOR   0x02
     74 #define TEXT_DESC     0x04
     75 #define TEXT_COPY     0x08
     76 #define TEXT_EMAIL    0x10
     77 #define TEXT_URL      0x20
     78 
     79 #define TEXT_TITLE_OFFSET        0
     80 #define TEXT_AUTHOR_OFFSET      72
     81 #define TEXT_COPY_OFFSET     (2*72)
     82 #define TEXT_EMAIL_OFFSET    (3*72)
     83 #define TEXT_URL_OFFSET      (4*72)
     84 #define TEXT_DESC_OFFSET     (5*72)
     85 
     86 typedef unsigned char   uch;
     87 typedef unsigned short  ush;
     88 typedef unsigned long   ulg;
     89 
     90 typedef struct _mainprog_info {
     91     double gamma;
     92     long width;
     93     long height;
     94     time_t modtime;
     95     FILE *infile;
     96     FILE *outfile;
     97     void *png_ptr;
     98     void *info_ptr;
     99     uch *image_data;
    100     uch **row_pointers;
    101     char *title;
    102     char *author;
    103     char *desc;
    104     char *copyright;
    105     char *email;
    106     char *url;
    107     int filter;    /* command-line-filter flag, not PNG row filter! */
    108     int pnmtype;
    109     int sample_depth;
    110     int interlaced;
    111     int have_bg;
    112     int have_time;
    113     int have_text;
    114     jmp_buf jmpbuf;
    115     uch bg_red;
    116     uch bg_green;
    117     uch bg_blue;
    118 } mainprog_info;
    119 
    120 
    121 /* prototypes for public functions in writepng.c */
    122 
    123 void writepng_version_info(void);
    124 
    125 int writepng_init(mainprog_info *mainprog_ptr);
    126 
    127 int writepng_encode_image(mainprog_info *mainprog_ptr);
    128 
    129 int writepng_encode_row(mainprog_info *mainprog_ptr);
    130 
    131 int writepng_encode_finish(mainprog_info *mainprog_ptr);
    132 
    133 void writepng_cleanup(mainprog_info *mainprog_ptr);
    134