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- /* pxl-outline.h: find a list of outlines which make up one character.
-
- Copyright (C) 1992 Free Software Foundation, Inc.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #ifndef PXL_OUTLINE_H
- #define PXL_OUTLINE_H
-
- #include "font.h"
- #include "types.h"
-
-
- /* This is a list of contiguous points on the bitmap. */
- typedef struct
- {
- coordinate_type *data;
- unsigned length;
- boolean clockwise;
- } pixel_outline_type;
-
- /* The Nth coordinate in the list. */
- #define O_COORDINATE(p_o, n) ((p_o).data[n])
-
- /* The length of the list. */
- #define O_LENGTH(p_o) ((p_o).length)
-
- /* Whether the outline moves clockwise or counterclockwise. */
- #define O_CLOCKWISE(p_o) ((p_o).clockwise)
-
- /* Since a pixel outline is cyclic, the index of thenext coordinate
- after the last is the first, and the previous coordinate before the
- first is the last. */
- #define O_NEXT(p_o, n) (((n) + 1) % O_LENGTH (p_o))
- #define O_PREV(p_o, n) ((n) == 0 \
- ? O_LENGTH (p_o) - 1 \
- : (n) - 1)
-
- /* And the character turns into a list of such lists. */
- typedef struct
- {
- pixel_outline_type *data;
- unsigned length;
- } pixel_outline_list_type;
-
- /* The Nth list in the list of lists. */
- #define O_LIST_OUTLINE(p_o_l, n) ((p_o_l).data[n])
-
- /* The length of the list of lists. */
- #define O_LIST_LENGTH(p_o_l) ((p_o_l).length)
-
-
- /* Find all pixels on the outline in the character C. */
- extern pixel_outline_list_type find_outline_pixels (char_info_type c);
-
- /* Free the memory in the list. */
- extern void free_pixel_outline_list (pixel_outline_list_type *);
-
- #endif /* not PXL_OUTLINE_H */
-