92 lines
3.3 KiB
C
92 lines
3.3 KiB
C
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/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995-1999 Spencer Kimball and Peter Mattis
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*
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* pikaink-blob.h: routines for manipulating scan converted convex polygons.
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* Copyright 1998, Owen Taylor <otaylor@gtk.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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#ifndef __PIKA_INK_BLOB_H__
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#define __PIKA_INK_BLOB_H__
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typedef struct _PikaBlobPoint PikaBlobPoint;
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typedef struct _PikaBlobSpan PikaBlobSpan;
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typedef struct _PikaBlob PikaBlob;
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typedef PikaBlob * (* PikaBlobFunc) (gdouble xc,
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gdouble yc,
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gdouble xp,
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gdouble yp,
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gdouble xq,
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gdouble yq);
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struct _PikaBlobPoint
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{
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gint x;
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gint y;
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};
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struct _PikaBlobSpan
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{
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gint left;
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gint right;
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};
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struct _PikaBlob
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{
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gint y;
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gint height;
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PikaBlobSpan data[1];
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};
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PikaBlob * pika_blob_polygon (PikaBlobPoint *points,
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gint n_points);
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PikaBlob * pika_blob_square (gdouble xc,
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gdouble yc,
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gdouble xp,
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gdouble yp,
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gdouble xq,
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gdouble yq);
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PikaBlob * pika_blob_diamond (gdouble xc,
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gdouble yc,
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gdouble xp,
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gdouble yp,
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gdouble xq,
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gdouble yq);
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PikaBlob * pika_blob_ellipse (gdouble xc,
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gdouble yc,
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gdouble xp,
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gdouble yp,
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gdouble xq,
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gdouble yq);
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void pika_blob_bounds (PikaBlob *b,
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gint *x,
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gint *y,
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gint *width,
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gint *height);
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PikaBlob * pika_blob_convex_union (PikaBlob *b1,
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PikaBlob *b2);
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PikaBlob * pika_blob_duplicate (PikaBlob *b);
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#endif /* __PIKA_INK_BLOB_H__ */
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