| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /*--------------------------------------------------------------------------- |
| 2 | |
| 3 | wpng - simple PNG-writing program writepng.h |
| 4 | |
| 5 | --------------------------------------------------------------------------- |
| 6 | |
| 7 | Copyright (c) 1998-2000 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 | Permission is granted to anyone to use this software for any purpose, |
| 15 | including commercial applications, and to alter it and redistribute |
| 16 | it freely, subject to the following restrictions: |
| 17 | |
| 18 | 1. Redistributions of source code must retain the above copyright |
| 19 | notice, disclaimer, and this list of conditions. |
| 20 | 2. Redistributions in binary form must reproduce the above copyright |
| 21 | notice, disclaimer, and this list of conditions in the documenta- |
| 22 | tion and/or other materials provided with the distribution. |
| 23 | 3. All advertising materials mentioning features or use of this |
| 24 | software must display the following acknowledgment: |
| 25 | |
| 26 | This product includes software developed by Greg Roelofs |
| 27 | and contributors for the book, "PNG: The Definitive Guide," |
| 28 | published by O'Reilly and Associates. |
| 29 | |
| 30 | ---------------------------------------------------------------------------*/ |
| 31 | |
| 32 | #ifndef TRUE |
| 33 | # define TRUE 1 |
| 34 | # define FALSE 0 |
| 35 | #endif |
| 36 | |
| 37 | #ifndef MAX |
| 38 | # define MAX(a,b) ((a) > (b)? (a) : (b)) |
| 39 | # define MIN(a,b) ((a) < (b)? (a) : (b)) |
| 40 | #endif |
| 41 | |
| 42 | #ifdef DEBUG |
| 43 | # define Trace(x) {fprintf x ; fflush(stderr); fflush(stdout);} |
| 44 | #else |
| 45 | # define Trace(x) ; |
| 46 | #endif |
| 47 | |
| 48 | #define TEXT_TITLE 0x01 |
| 49 | #define TEXT_AUTHOR 0x02 |
| 50 | #define TEXT_DESC 0x04 |
| 51 | #define TEXT_COPY 0x08 |
| 52 | #define TEXT_EMAIL 0x10 |
| 53 | #define TEXT_URL 0x20 |
| 54 | |
| 55 | #define TEXT_TITLE_OFFSET 0 |
| 56 | #define TEXT_AUTHOR_OFFSET 72 |
| 57 | #define TEXT_COPY_OFFSET (2*72) |
| 58 | #define TEXT_EMAIL_OFFSET (3*72) |
| 59 | #define TEXT_URL_OFFSET (4*72) |
| 60 | #define TEXT_DESC_OFFSET (5*72) |
| 61 | |
| 62 | typedef unsigned char uch; |
| 63 | typedef unsigned short ush; |
| 64 | typedef unsigned long ulg; |
| 65 | |
| 66 | typedef struct _mainprog_info { |
| 67 | double gamma; |
| 68 | long width; |
| 69 | long height; |
| 70 | time_t modtime; |
| 71 | FILE *infile; |
| 72 | FILE *outfile; |
| 73 | void *png_ptr; |
| 74 | void *info_ptr; |
| 75 | uch *image_data; |
| 76 | uch **row_pointers; |
| 77 | char *title; |
| 78 | char *author; |
| 79 | char *desc; |
| 80 | char *copyright; |
| 81 | char *email; |
| 82 | char *url; |
| 83 | int filter; /* command-line-filter flag, not PNG row filter! */ |
| 84 | int pnmtype; |
| 85 | int sample_depth; |
| 86 | int interlaced; |
| 87 | int have_bg; |
| 88 | int have_time; |
| 89 | int have_text; |
| 90 | jmp_buf jmpbuf; |
| 91 | uch bg_red; |
| 92 | uch bg_green; |
| 93 | uch bg_blue; |
| 94 | } mainprog_info; |
| 95 | |
| 96 | |
| 97 | /* prototypes for public functions in writepng.c */ |
| 98 | |
| 99 | void writepng_version_info(void); |
| 100 | |
| 101 | int writepng_init(mainprog_info *mainprog_ptr); |
| 102 | |
| 103 | int writepng_encode_image(mainprog_info *mainprog_ptr); |
| 104 | |
| 105 | int writepng_encode_row(mainprog_info *mainprog_ptr); |
| 106 | |
| 107 | int writepng_encode_finish(mainprog_info *mainprog_ptr); |
| 108 | |
| 109 | void writepng_cleanup(mainprog_info *mainprog_ptr); |