mirror of https://github.com/GNOME/gimp.git
144 lines
4.4 KiB
C
144 lines
4.4 KiB
C
/* The GIMP -- an image manipulation program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* IfsCompose is a interface for creating IFS fractals by
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* direct manipulation.
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* Copyright (C) 1997 Owen Taylor
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*
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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 2 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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typedef struct {
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gdouble a11,a12,a21,a22,b1,b2;
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} Aff2;
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typedef struct {
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gdouble vals[3][4];
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} Aff3;
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typedef struct {
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GdkPoint *points;
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gint npoints;
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} IPolygon;
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typedef struct {
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gdouble x, y;
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gdouble theta;
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gdouble scale;
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gdouble asym;
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gdouble shear;
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gint flip;
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GimpRGB red_color;
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GimpRGB green_color;
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GimpRGB blue_color;
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GimpRGB black_color;
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GimpRGB target_color;
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gdouble hue_scale;
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gdouble value_scale;
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gint simple_color;
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gdouble prob;
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} AffElementVals;
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typedef struct
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{
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gint num_elements;
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gint iterations;
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gint max_memory;
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gint subdivide;
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gdouble radius;
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gdouble aspect_ratio;
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gdouble center_x;
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gdouble center_y;
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} IfsComposeVals;
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typedef struct {
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AffElementVals v;
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Aff2 trans;
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Aff3 color_trans;
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gchar *name;
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IPolygon *click_boundary;
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IPolygon *draw_boundary;
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} AffElement;
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/* manipulation of affine transforms */
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void aff2_translate (Aff2 *naff, gdouble x, gdouble y);
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void aff2_rotate (Aff2 *naff, gdouble theta);
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void aff2_scale (Aff2 *naff, gdouble s, gint flip);
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void aff2_distort (Aff2 *naff, gdouble asym, gdouble shear);
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void aff2_compute_stretch (Aff2 *naff,
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gdouble xo, gdouble yo,
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gdouble xn, gdouble yn);
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void aff2_compute_distort (Aff2 *naff,
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gdouble xo, gdouble yo,
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gdouble xn, gdouble yn);
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void aff2_compose (Aff2 *naff, Aff2 *aff1, Aff2 *aff2);
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void aff2_invert (Aff2 *naff, Aff2 *aff);
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void aff2_apply (Aff2 *aff, gdouble x, gdouble y,
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gdouble *xf, gdouble *yf);
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void aff2_fixed_point (Aff2 *aff, gdouble *xf, gdouble *yf);
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void aff3_apply (Aff3 *t, gdouble x, gdouble y, gdouble z,
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gdouble *xf, gdouble *yf, gdouble *zf);
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/* manipulation of polygons */
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IPolygon *ipolygon_convex_hull (IPolygon *poly);
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gint ipolygon_contains (IPolygon *poly, gint xt, gint yt);
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/* manipulation of composite transforms */
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AffElement *aff_element_new (gdouble x, gdouble y, GimpRGB *color, gint count);
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void aff_element_free (AffElement *elem);
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void aff_element_compute_trans (AffElement *elem, gdouble width,
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gdouble height,
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gdouble center_x, gdouble center_y);
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void aff_element_compute_color_trans (AffElement *elem);
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void aff_element_decompose_trans (AffElement *elem, Aff2 *aff,
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gdouble width, gdouble height,
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gdouble center_x, gdouble center_y);
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void aff_element_compute_boundary (AffElement *elem, gint width,
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gint height,
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AffElement **elements,
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int num_elements);
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void aff_element_draw (AffElement *elem,
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gint selected,
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gint width,
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gint height,
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GdkDrawable *win,
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GdkGC *normal_gc,
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GdkGC *selected_gc,
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PangoLayout *layout);
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void ifs_render (AffElement **elements, gint num_elements,
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gint width, gint height, gint nsteps,
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IfsComposeVals *vals, gint band_y, gint band_height,
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guchar *data, guchar *mask, guchar *nhits, gint preview);
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gchar * ifsvals_stringify (IfsComposeVals *vals,
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AffElement **elements);
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gboolean ifsvals_parse_string (const gchar *str,
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IfsComposeVals *vals,
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AffElement ***elements);
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