forked from openkylin/gimp
181 lines
6.0 KiB
C
181 lines
6.0 KiB
C
|
/* GIMP - The GNU Image Manipulation Program
|
||
|
|
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
|
||
|
|
*
|
||
|
|
* IfsCompose is a interface for creating IFS fractals by
|
||
|
|
* direct manipulation.
|
||
|
|
* Copyright (C) 1997 Owen Taylor
|
||
|
|
*
|
||
|
|
* 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/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
typedef struct {
|
||
|
|
gdouble a11,a12,a21,a22,b1,b2;
|
||
|
|
} Aff2;
|
||
|
|
|
||
|
|
typedef struct {
|
||
|
|
gdouble vals[3][4];
|
||
|
|
} Aff3;
|
||
|
|
|
||
|
|
typedef struct {
|
||
|
|
GdkPoint *points;
|
||
|
|
gint npoints;
|
||
|
|
} IPolygon;
|
||
|
|
|
||
|
|
typedef struct {
|
||
|
|
gdouble x, y;
|
||
|
|
gdouble theta;
|
||
|
|
gdouble scale;
|
||
|
|
gdouble asym;
|
||
|
|
gdouble shear;
|
||
|
|
gint flip;
|
||
|
|
|
||
|
|
GimpRGB red_color;
|
||
|
|
GimpRGB green_color;
|
||
|
|
GimpRGB blue_color;
|
||
|
|
GimpRGB black_color;
|
||
|
|
|
||
|
|
GimpRGB target_color;
|
||
|
|
gdouble hue_scale;
|
||
|
|
gdouble value_scale;
|
||
|
|
|
||
|
|
gint simple_color;
|
||
|
|
gdouble prob;
|
||
|
|
} AffElementVals;
|
||
|
|
|
||
|
|
typedef struct
|
||
|
|
{
|
||
|
|
gint num_elements;
|
||
|
|
gint iterations;
|
||
|
|
gint max_memory;
|
||
|
|
gint subdivide;
|
||
|
|
gdouble radius;
|
||
|
|
gdouble aspect_ratio;
|
||
|
|
gdouble center_x;
|
||
|
|
gdouble center_y;
|
||
|
|
} IfsComposeVals;
|
||
|
|
|
||
|
|
typedef struct {
|
||
|
|
AffElementVals v;
|
||
|
|
|
||
|
|
Aff2 trans;
|
||
|
|
Aff3 color_trans;
|
||
|
|
|
||
|
|
gchar *name;
|
||
|
|
|
||
|
|
IPolygon *click_boundary;
|
||
|
|
IPolygon *draw_boundary;
|
||
|
|
} AffElement;
|
||
|
|
|
||
|
|
|
||
|
|
/* manipulation of affine transforms */
|
||
|
|
void aff2_translate (Aff2 *naff,
|
||
|
|
gdouble x,
|
||
|
|
gdouble y);
|
||
|
|
void aff2_rotate (Aff2 *naff,
|
||
|
|
gdouble theta);
|
||
|
|
void aff2_scale (Aff2 *naff,
|
||
|
|
gdouble s,
|
||
|
|
gint flip);
|
||
|
|
void aff2_distort (Aff2 *naff,
|
||
|
|
gdouble asym,
|
||
|
|
gdouble shear);
|
||
|
|
void aff2_compute_stretch (Aff2 *naff,
|
||
|
|
gdouble xo,
|
||
|
|
gdouble yo,
|
||
|
|
gdouble xn,
|
||
|
|
gdouble yn);
|
||
|
|
void aff2_compute_distort (Aff2 *naff,
|
||
|
|
gdouble xo,
|
||
|
|
gdouble yo,
|
||
|
|
gdouble xn,
|
||
|
|
gdouble yn);
|
||
|
|
void aff2_compose (Aff2 *naff,
|
||
|
|
Aff2 *aff1,
|
||
|
|
Aff2 *aff2);
|
||
|
|
void aff2_invert (Aff2 *naff,
|
||
|
|
Aff2 *aff);
|
||
|
|
void aff2_apply (Aff2 *aff,
|
||
|
|
gdouble x,
|
||
|
|
gdouble y,
|
||
|
|
gdouble *xf,
|
||
|
|
gdouble *yf);
|
||
|
|
void aff2_fixed_point (Aff2 *aff,
|
||
|
|
gdouble *xf,
|
||
|
|
gdouble *yf);
|
||
|
|
void aff3_apply (Aff3 *t,
|
||
|
|
gdouble x,
|
||
|
|
gdouble y,
|
||
|
|
gdouble z,
|
||
|
|
gdouble *xf,
|
||
|
|
gdouble *yf,
|
||
|
|
gdouble *zf);
|
||
|
|
|
||
|
|
|
||
|
|
/* manipulation of polygons */
|
||
|
|
IPolygon *ipolygon_convex_hull (IPolygon *poly);
|
||
|
|
gint ipolygon_contains (IPolygon *poly,
|
||
|
|
gint xt,
|
||
|
|
gint yt);
|
||
|
|
|
||
|
|
|
||
|
|
/* manipulation of composite transforms */
|
||
|
|
AffElement *aff_element_new (gdouble x,
|
||
|
|
gdouble y,
|
||
|
|
GimpRGB *color,
|
||
|
|
gint count);
|
||
|
|
void aff_element_free (AffElement *elem);
|
||
|
|
void aff_element_compute_trans (AffElement *elem,
|
||
|
|
gdouble width,
|
||
|
|
gdouble height,
|
||
|
|
gdouble center_x,
|
||
|
|
gdouble center_y);
|
||
|
|
void aff_element_compute_color_trans (AffElement *elem);
|
||
|
|
void aff_element_decompose_trans (AffElement *elem,
|
||
|
|
Aff2 *aff,
|
||
|
|
gdouble width,
|
||
|
|
gdouble height,
|
||
|
|
gdouble center_x,
|
||
|
|
gdouble center_y);
|
||
|
|
void aff_element_compute_boundary (AffElement *elem,
|
||
|
|
gint width,
|
||
|
|
gint height,
|
||
|
|
AffElement **elements,
|
||
|
|
gint num_elements);
|
||
|
|
void aff_element_draw (AffElement *elem,
|
||
|
|
gint selected,
|
||
|
|
gint width,
|
||
|
|
gint height,
|
||
|
|
cairo_t *cr,
|
||
|
|
GdkColor *color,
|
||
|
|
PangoLayout *layout);
|
||
|
|
|
||
|
|
|
||
|
|
void ifs_render (AffElement **elements,
|
||
|
|
gint num_elements,
|
||
|
|
gint width,
|
||
|
|
gint height,
|
||
|
|
gint nsteps,
|
||
|
|
IfsComposeVals *vals,
|
||
|
|
gint band_y,
|
||
|
|
gint band_height,
|
||
|
|
guchar *data,
|
||
|
|
guchar *mask,
|
||
|
|
guchar *nhits,
|
||
|
|
gboolean preview);
|
||
|
|
|
||
|
|
gchar * ifsvals_stringify (IfsComposeVals *vals,
|
||
|
|
AffElement **elements);
|
||
|
|
gboolean ifsvals_parse_string (const gchar *str,
|
||
|
|
IfsComposeVals *vals,
|
||
|
|
AffElement ***elements);
|