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Diffstat (limited to '')
| -rw-r--r-- | plug-ins/ifs-compose/ifs-compose.h | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/plug-ins/ifs-compose/ifs-compose.h b/plug-ins/ifs-compose/ifs-compose.h new file mode 100644 index 0000000..28b9a3b --- /dev/null +++ b/plug-ins/ifs-compose/ifs-compose.h @@ -0,0 +1,180 @@ +/* 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); |