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(aalib.info)Initialization for image saving
Initialization for image saving
===============================
AA-Lib also have a driver specialized for image saving. It's name is
`save_d'(currently only driver that uses `aa_savedata' structure):
struct aa_savedata {
char *name;
struct aa_format *format;
FILE *file;
};
Field `name' contains a filename (without extension). If you wish
to specify file descriptor, you might want to use field `file' instead.
Set `name' to `NULL' in this cases. Note that then file will not be
closed automatically. In `name' you should use following tags:
`%x'
X coordinate of page, if pages enabled otherwise none
`%y'
Y coordinate of page, if pages enabled otherwise none
`%c'
Coordinates in format: `_%x_%y', if pages enabled otherwise none
`%e'
Default extension (like `.html') `Format' is a pointer to
`aa_format' structure (format information):
struct aa_format {
int width, height; /*default width/height*/
int pagewidth, pageheight;/*in case output is made from pages*/
int flags; /*should be made from:
AA_USE_PAGES
AA_NORMAL_SPACES
*/
int supported; /*mask of supported attributes*/
struct aa_font *font; /*font used by hardware device*/
char *formatname; /*name of format*/
char *extension; /*file extension*/
char *head; /*text at the beggining of file*/
char *end; /*text at the end of file*/
char *newline; /*text at the end of line*/
char *prints[AA_NATTRS]; /*printf seqence for printing character*/
char *begin[AA_NATTRS]; /*text printed at the beggining of block
of character at gived attribute*/
char *ends[AA_NATTRS]; /*text printed at the end of block*/
char **conversions /*conversion tabe*/
};
Conversions is array of strings in format: character, replacement,
terminated by `NULL'.
Following code is an example of `HTML' format description:
static char *html_escapes[] = {"<", "<", ">", ">", "&", "&", NULL};
struct aa_format aa_html_format =
{
79, 25,
0, 0,
0,
AA_NORMAL_MASK | AA_BOLD_MASK | AA_BOLDFONT_MASK,
NULL,
"Pure html",
".html",
"<HTML>\n <HEAD> <TITLE>Ascii arted image
done using aalib</TITLE>\n</HEAD>\n<BODY><PRE>\n",
"</PRE></BODY>\n</HTML>\n",
"\n",
/*The order is:normal, dim, bold, boldfont, reverse, special*/
{ "%s", "%s", "%s", "%s", "%s", },
{"", "", "<B>", "", "<B>" },
{"", "", "</B>", "", "</B>" },
html_escapes
};
Usually you don't need to worry about filling in this large
structure since the formats are already defined: `aa_nhtml_format',
`aa_html_format', `aa_html_alt_format', `aa_ansi_format',
`aa_text_format', `aa_more_format', `aa_hp_format', `aa_hp2_format',
`aa_zephyr_format', `aa_irc_format'. All formats are collected in
`aa_formats' array. It is array of pointers to `aa_format' terminated
by `NULL'
All additional new formats are welcomed.
automatically generated by info2www version 1.2.2.9