PIKApp/app/paint/pikaink-blob.h

92 lines
3.3 KiB
C

/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995-1999 Spencer Kimball and Peter Mattis
*
* pikaink-blob.h: routines for manipulating scan converted convex polygons.
* Copyright 1998, Owen Taylor <otaylor@gtk.org>
*
* 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 3 of the License, 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, see <https://www.gnu.org/licenses/>.
*
*/
#ifndef __PIKA_INK_BLOB_H__
#define __PIKA_INK_BLOB_H__
typedef struct _PikaBlobPoint PikaBlobPoint;
typedef struct _PikaBlobSpan PikaBlobSpan;
typedef struct _PikaBlob PikaBlob;
typedef PikaBlob * (* PikaBlobFunc) (gdouble xc,
gdouble yc,
gdouble xp,
gdouble yp,
gdouble xq,
gdouble yq);
struct _PikaBlobPoint
{
gint x;
gint y;
};
struct _PikaBlobSpan
{
gint left;
gint right;
};
struct _PikaBlob
{
gint y;
gint height;
PikaBlobSpan data[1];
};
PikaBlob * pika_blob_polygon (PikaBlobPoint *points,
gint n_points);
PikaBlob * pika_blob_square (gdouble xc,
gdouble yc,
gdouble xp,
gdouble yp,
gdouble xq,
gdouble yq);
PikaBlob * pika_blob_diamond (gdouble xc,
gdouble yc,
gdouble xp,
gdouble yp,
gdouble xq,
gdouble yq);
PikaBlob * pika_blob_ellipse (gdouble xc,
gdouble yc,
gdouble xp,
gdouble yp,
gdouble xq,
gdouble yq);
void pika_blob_bounds (PikaBlob *b,
gint *x,
gint *y,
gint *width,
gint *height);
PikaBlob * pika_blob_convex_union (PikaBlob *b1,
PikaBlob *b2);
PikaBlob * pika_blob_duplicate (PikaBlob *b);
#endif /* __PIKA_INK_BLOB_H__ */