sixel.h
1#ifndef SIXEL_H
2#define SIXEL_H
3
4#define DECSIXEL_PARAMS_MAX 16
5#define DECSIXEL_PALETTE_MAX 1024
6#define DECSIXEL_PARAMVALUE_MAX 65535
7#define DECSIXEL_WIDTH_MAX 4096
8#define DECSIXEL_HEIGHT_MAX 4096
9
10typedef unsigned short sixel_color_no_t;
11typedef unsigned int sixel_color_t;
12
13typedef struct sixel_image_buffer {
14 sixel_color_no_t *data;
15 int width;
16 int height;
17 sixel_color_t palette[DECSIXEL_PALETTE_MAX];
18 sixel_color_no_t ncolors;
19 int palette_modified;
20 int use_private_register;
21} sixel_image_t;
22
23typedef enum parse_state {
24 PS_ESC = 1, /* ESC */
25 PS_DECSIXEL = 2, /* DECSIXEL body part ", $, -, ? ... ~ */
26 PS_DECGRA = 3, /* DECGRA Set Raster Attributes " Pan; Pad; Ph; Pv */
27 PS_DECGRI = 4, /* DECGRI Graphics Repeat Introducer ! Pn Ch */
28 PS_DECGCI = 5, /* DECGCI Graphics Color Introducer # Pc; Pu; Px; Py; Pz */
29 PS_ERROR = 6,
30} parse_state_t;
31
32typedef struct parser_context {
33 parse_state_t state;
34 int pos_x;
35 int pos_y;
36 int max_x;
37 int max_y;
38 int attributed_pan;
39 int attributed_pad;
40 int attributed_ph;
41 int attributed_pv;
42 int transparent;
43 int repeat_count;
44 int color_index;
45 int bgindex;
46 int grid_width;
47 int grid_height;
48 int param;
49 int nparams;
50 int params[DECSIXEL_PARAMS_MAX];
51 sixel_image_t image;
52} sixel_state_t;
53
54void scroll_images(int n);
55void delete_image(ImageList *im);
56int sixel_parser_init(sixel_state_t *st, int transparent, sixel_color_t fgcolor, sixel_color_t bgcolor, unsigned char use_private_register, int cell_width, int cell_height);
57int sixel_parser_parse(sixel_state_t *st, const unsigned char *p, size_t len);
58int sixel_parser_set_default_color(sixel_state_t *st);
59int sixel_parser_finalize(sixel_state_t *st, ImageList **newimages, int cx, int cy, int cw, int ch);
60void sixel_parser_deinit(sixel_state_t *st);
61Pixmap sixel_create_clipmask(char *pixels, int width, int height);
62
63#endif
