Add sixel patch

1 files changed, 63 insertions, 0 deletions

diff --git a/sixel.h b/sixel.h
new file mode 100644
index 0000000..7d14f8a
--- /dev/null
+++ b/sixel.h
@@ -0,0 +1,63 @@
+#ifndef SIXEL_H
+#define SIXEL_H
+
+#define DECSIXEL_PARAMS_MAX 16
+#define DECSIXEL_PALETTE_MAX 1024
+#define DECSIXEL_PARAMVALUE_MAX 65535
+#define DECSIXEL_WIDTH_MAX 4096
+#define DECSIXEL_HEIGHT_MAX 4096
+
+typedef unsigned short sixel_color_no_t;
+typedef unsigned int sixel_color_t;
+
+typedef struct sixel_image_buffer {
+	sixel_color_no_t *data;
+	int width;
+	int height;
+	sixel_color_t palette[DECSIXEL_PALETTE_MAX];
+	sixel_color_no_t ncolors;
+	int palette_modified;
+	int use_private_register;
+} sixel_image_t;
+
+typedef enum parse_state {
+	PS_ESC        = 1,  /* ESC */
+	PS_DECSIXEL   = 2,  /* DECSIXEL body part ", $, -, ? ... ~ */
+	PS_DECGRA     = 3,  /* DECGRA Set Raster Attributes " Pan; Pad; Ph; Pv */
+	PS_DECGRI     = 4,  /* DECGRI Graphics Repeat Introducer ! Pn Ch */
+	PS_DECGCI     = 5,  /* DECGCI Graphics Color Introducer # Pc; Pu; Px; Py; Pz */
+	PS_ERROR      = 6,
+} parse_state_t;
+
+typedef struct parser_context {
+	parse_state_t state;
+	int pos_x;
+	int pos_y;
+	int max_x;
+	int max_y;
+	int attributed_pan;
+	int attributed_pad;
+	int attributed_ph;
+	int attributed_pv;
+	int transparent;
+	int repeat_count;
+	int color_index;
+	int bgindex;
+	int grid_width;
+	int grid_height;
+	int param;
+	int nparams;
+	int params[DECSIXEL_PARAMS_MAX];
+	sixel_image_t image;
+} sixel_state_t;
+
+void scroll_images(int n);
+void delete_image(ImageList *im);
+int 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);
+int sixel_parser_parse(sixel_state_t *st, const unsigned char *p, size_t len);
+int sixel_parser_set_default_color(sixel_state_t *st);
+int sixel_parser_finalize(sixel_state_t *st, ImageList **newimages, int cx, int cy, int cw, int ch);
+void sixel_parser_deinit(sixel_state_t *st);
+Pixmap sixel_create_clipmask(char *pixels, int width, int height);
+
+#endif