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- /* airbrush_blob.h: routines for manipulating scan converted convex
- * polygons.
- *
- * Copyright 1998, Owen Taylor <otaylor@gtk.org>
- *
- * > Please contact the above author before modifying the copy <
- * > of this file in the GIMP distribution. Thanks. <
- *
- * 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 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, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- */
-
- #ifndef __AIRBRUSHBLOB_H__
- #define __AIRBRUSHBLOB_H__
-
- typedef enum {
- CROSS = 0,
- CROSS_LEFT = 1,
- CROSS_RIGHT = 2,
- CROSS_WHOLE_LINE = 3,
- CROSS_NORMAL = 4
- } CrossType;
-
- typedef enum {
- RIGHT_LEFT = 0,
- LEFT_RIGHT = 1,
- TOP_BOT = 2,
- BOT_TOP = 3,
- NONE = 4
- } MoveType;
-
- /* The AirBlob, which is a abstract of a real AirBrushBlob */
-
- typedef struct _AirBlob AirBlob;
- typedef struct _AirPoint AirPoint;
- typedef struct _SupportLine SupportLine;
-
-
- struct _AirPoint {
- int x;
- int y;
- };
-
- struct _SupportLine {
- double size;
- double dist;
- };
-
- struct _AirBlob {
- double direction_abs;
- double direction;
- double ycenter;
- double xcenter;
- SupportLine main_line;
- SupportLine minor_line;
- SupportLine maincross_line;
- SupportLine minorcross_line;
- };
-
-
- /* The AirLine is a reslut of a AirBlob */
- typedef struct _AirLine AirLine;
-
- struct _AirLine {
- int xcenter;
- int ycenter;
- AirPoint line[16];
- int min_x, min_y;
- int max_x, max_y;
- int width, height;
- int nlines;
- };
-
-
- typedef struct _AirBrushBlobPoint AirBrushBlobPoint;
- typedef struct _AirBrushBlobSpan AirBrushBlobSpan;
- typedef struct _AirBrushBlob AirBrushBlob;
-
- struct _AirBrushBlobPoint {
- int x;
- int y;
- };
-
- struct _AirBrushBlobSpan {
- int left;
- double angle_left;
- double angle_left_abs;
- double dist_left;
- int right;
- double angle_right;
- double angle_right_abs;
- double dist_right;
-
- CrossType cross_type;
- int x_cross;
-
- int center;
- double dist;
-
- };
-
- struct _AirBrushBlob {
- int y;
- int height;
- int width;
- int min_x;
- int max_x;
- MoveType move;
- double direction_abs;
- double direction;
- CrossType cross;
- AirBrushBlobSpan data[1];
- };
-
-
- typedef struct _AirBrush AirBrush;
-
- struct _AirBrush {
- AirBrushBlob airbrush_blob;
- AirBlob airblob;
- };
-
-
-
-
- AirBlob *create_air_blob (double xc, double yc, double xt, double yt, double xr, double yr, double xb, double yb, double xl, double yl, double direction_abs, double direction);
- AirBlob *trans_air_blob(AirBlob *airblob_last, AirBlob *airblob_present, double dist, int xc, int yc);
- AirLine *create_air_line(AirBlob *airblob);
-
-
-
-
-
- AirBrushBlob *airbrush_blob_convex_union (AirBrushBlob *b1, AirBrushBlob *b2);
- AirBrushBlob *airbrush_blob_ellipse (double xc, double yc, double xt, double yt, double xr, double yr, double xb, double yb, double xl, double yl);
- void airbrush_blob_bounds (AirBrushBlob *b, int *x, int *y, int *width, int *height);
-
-
-
-
- #endif /* __AIRBRUSHBLOB_H__ */
-