gimp/plug-ins/gfig/gfig-poly.c

535 lines
13 KiB
C
Raw Normal View History

/*
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This is a plug-in for GIMP.
*
* Generates images containing vector type drawings.
*
* Copyright (C) 1997 Andy Thomas alt@picnic.demon.co.uk
*
* 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/>.
*
*/
#include "config.h"
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "gfig.h"
#include "gfig-dobject.h"
#include "gfig-line.h"
#include "gfig-dialog.h"
#include "gfig-poly.h"
#include "libgimp/stdplugins-intl.h"
static gint poly_num_sides = 3; /* Default to three sided object */
2012-02-17 00:56:52 +08:00
static void d_draw_poly (GfigObject *obj,
cairo_t *cr);
static GfigObject *d_copy_poly (GfigObject *obj);
static void d_update_poly (GdkPoint *pnt);
void
tool_options_poly (GtkWidget *notebook)
{
GtkWidget *sides;
sides = num_sides_widget (_("Regular Polygon Number of Sides"),
&poly_num_sides, NULL, 3, 200);
gtk_notebook_append_page (GTK_NOTEBOOK (notebook), sides, NULL);
}
static void
2012-02-17 00:56:52 +08:00
d_draw_poly (GfigObject *obj,
cairo_t *cr)
{
DobjPoints *center_pnt;
DobjPoints *radius_pnt;
gint16 shift_x;
gint16 shift_y;
gdouble ang_grid;
gdouble ang_loop;
gdouble radius;
gdouble offset_angle;
gint loop;
GdkPoint start_pnt = { 0, 0 };
GdkPoint first_pnt = { 0, 0 };
gboolean do_line = FALSE;
center_pnt = obj->points;
if (!center_pnt)
return; /* End-of-line */
/* First point is the center */
/* Just draw a control point around it */
2012-02-17 00:56:52 +08:00
draw_sqr (&center_pnt->pnt, obj == gfig_context->selected_obj, cr);
/* Next point defines the radius */
radius_pnt = center_pnt->next; /* this defines the vertices */
if (!radius_pnt)
{
#ifdef DEBUG
g_warning ("Internal error in polygon - no vertice point \n");
#endif /* DEBUG */
return;
}
/* Other control point */
2012-02-17 00:56:52 +08:00
if (obj == obj_creating)
draw_circle (&radius_pnt->pnt, TRUE, cr);
else
draw_sqr (&radius_pnt->pnt, obj == gfig_context->selected_obj, cr);
/* Have center and radius - draw polygon */
shift_x = radius_pnt->pnt.x - center_pnt->pnt.x;
shift_y = radius_pnt->pnt.y - center_pnt->pnt.y;
radius = sqrt ((shift_x*shift_x) + (shift_y*shift_y));
/* Lines */
ang_grid = 2 * G_PI / (gdouble) obj->type_data;
offset_angle = atan2 (shift_y, shift_x);
for (loop = 0 ; loop < obj->type_data ; loop++)
{
gdouble lx, ly;
GdkPoint calc_pnt;
ang_loop = (gdouble)loop * ang_grid + offset_angle;
lx = radius * cos (ang_loop);
ly = radius * sin (ang_loop);
calc_pnt.x = RINT (lx + center_pnt->pnt.x);
calc_pnt.y = RINT (ly + center_pnt->pnt.y);
if (do_line)
{
/* Miss out points that come to the same location */
if (calc_pnt.x == start_pnt.x && calc_pnt.y == start_pnt.y)
continue;
2012-02-17 00:56:52 +08:00
gfig_draw_line (calc_pnt.x, calc_pnt.y, start_pnt.x, start_pnt.y, cr);
}
else
{
do_line = TRUE;
first_pnt = calc_pnt;
}
start_pnt = calc_pnt;
}
2012-02-17 00:56:52 +08:00
gfig_draw_line (first_pnt.x, first_pnt.y, start_pnt.x, start_pnt.y, cr);
}
void
d_paint_poly (GfigObject *obj)
{
/* first point center */
/* Next point is radius */
gdouble *line_pnts;
2012-02-17 00:57:05 +08:00
gint seg_count;
gint i = 0;
DobjPoints *center_pnt;
DobjPoints *radius_pnt;
gint16 shift_x;
gint16 shift_y;
gdouble ang_grid;
gdouble ang_loop;
gdouble radius;
gdouble offset_angle;
gint loop;
GdkPoint first_pnt = { 0, 0 };
GdkPoint last_pnt = { 0, 0 };
gboolean first = TRUE;
gdouble *min_max;
g_assert (obj != NULL);
/* count - add one to close polygon */
seg_count = obj->type_data + 1;
center_pnt = obj->points;
if (!center_pnt || !seg_count || !center_pnt->next)
return; /* no-line */
line_pnts = g_new0 (gdouble, 2 * seg_count + 1);
min_max = g_new (gdouble, 4);
/* Go around all the points drawing a line from one to the next */
radius_pnt = center_pnt->next; /* this defines the vetices */
/* Have center and radius - get lines */
shift_x = radius_pnt->pnt.x - center_pnt->pnt.x;
shift_y = radius_pnt->pnt.y - center_pnt->pnt.y;
radius = sqrt ((shift_x*shift_x) + (shift_y*shift_y));
/* Lines */
ang_grid = 2.0 * G_PI/(gdouble) obj->type_data;
offset_angle = atan2 (shift_y, shift_x);
for (loop = 0 ; loop < obj->type_data ; loop++)
{
gdouble lx, ly;
GdkPoint calc_pnt;
ang_loop = (gdouble)loop * ang_grid + offset_angle;
lx = radius * cos (ang_loop);
ly = radius * sin (ang_loop);
calc_pnt.x = RINT (lx + center_pnt->pnt.x);
calc_pnt.y = RINT (ly + center_pnt->pnt.y);
/* Miss out duped pnts */
if (!first)
{
if (calc_pnt.x == last_pnt.x && calc_pnt.y == last_pnt.y)
{
continue;
}
}
line_pnts[i++] = calc_pnt.x;
line_pnts[i++] = calc_pnt.y;
last_pnt = calc_pnt;
if (first)
{
first_pnt = calc_pnt;
first = FALSE;
min_max[0] = min_max[2] = calc_pnt.x;
min_max[1] = min_max[3] = calc_pnt.y;
}
else
{
min_max[0] = MIN (min_max[0], calc_pnt.x);
min_max[1] = MIN (min_max[1], calc_pnt.y);
min_max[2] = MAX (min_max[2], calc_pnt.x);
min_max[3] = MAX (min_max[3], calc_pnt.y);
}
}
line_pnts[i++] = first_pnt.x;
line_pnts[i++] = first_pnt.y;
/* Scale before drawing */
if (selvals.scaletoimage)
{/* FIXME scale xmax and al. */
scale_to_original_xy (&line_pnts[0], i/2);
scale_to_original_xy (min_max, 2);
}
else
{
scale_to_xy (&line_pnts[0], i/2);
scale_to_xy (min_max, 2);
}
if (gfig_context_get_current_style ()->fill_type != FILL_NONE)
{
gimp_context_push ();
gimp_context_set_antialias (selopt.antia);
gimp_context_set_feather (selopt.feather);
gimp_context_set_feather_radius (selopt.feather_radius, selopt.feather_radius);
gimp_image_select_polygon (gfig_context->image,
selopt.type,
i, line_pnts);
gimp_context_pop ();
paint_layer_fill (min_max[0], min_max[1], min_max[2], min_max[3]);
gimp_selection_none (gfig_context->image);
}
if (obj->style.paint_type == PAINT_BRUSH_TYPE)
gfig_paint (selvals.brshtype, gfig_context->drawable, i, line_pnts);
g_free (line_pnts);
g_free (min_max);
}
void
d_poly2lines (GfigObject *obj)
{
/* first point center */
/* Next point is radius */
DobjPoints *center_pnt;
DobjPoints *radius_pnt;
gint16 shift_x;
gint16 shift_y;
gdouble ang_grid;
gdouble ang_loop;
gdouble radius;
gdouble offset_angle;
gint loop;
GdkPoint first_pnt = { 0, 0 };
GdkPoint last_pnt = { 0, 0 };
gboolean first = TRUE;
g_assert (obj != NULL);
center_pnt = obj->points;
if (!center_pnt)
return; /* no-line */
/* NULL out these points free later */
obj->points = NULL;
/* Go around all the points creating line points */
radius_pnt = center_pnt->next; /* this defines the vertices */
/* Have center and radius - get lines */
shift_x = radius_pnt->pnt.x - center_pnt->pnt.x;
shift_y = radius_pnt->pnt.y - center_pnt->pnt.y;
radius = sqrt ((shift_x*shift_x) + (shift_y*shift_y));
/* Lines */
ang_grid = 2.0 * G_PI / (gdouble) obj->type_data;
offset_angle = atan2 (shift_y, shift_x);
for (loop = 0 ; loop < obj->type_data ; loop++)
{
gdouble lx, ly;
GdkPoint calc_pnt;
ang_loop = (gdouble)loop * ang_grid + offset_angle;
lx = radius * cos (ang_loop);
ly = radius * sin (ang_loop);
calc_pnt.x = RINT (lx + center_pnt->pnt.x);
calc_pnt.y = RINT (ly + center_pnt->pnt.y);
if (!first)
{
if (calc_pnt.x == last_pnt.x && calc_pnt.y == last_pnt.y)
{
continue;
}
}
d_pnt_add_line (obj, calc_pnt.x, calc_pnt.y, 0);
last_pnt = calc_pnt;
if (first)
{
first_pnt = calc_pnt;
first = FALSE;
}
}
d_pnt_add_line (obj, first_pnt.x, first_pnt.y, 0);
/* Free old pnts */
d_delete_dobjpoints (center_pnt);
/* hey we're a line now */
obj->type = LINE;
obj->class = &dobj_class[LINE];
}
void
d_star2lines (GfigObject *obj)
{
/* first point center */
/* Next point is radius */
DobjPoints *center_pnt;
DobjPoints *outer_radius_pnt;
DobjPoints *inner_radius_pnt;
gint16 shift_x;
gint16 shift_y;
gdouble ang_grid;
gdouble ang_loop;
gdouble outer_radius;
gdouble inner_radius;
gdouble offset_angle;
gint loop;
GdkPoint first_pnt = { 0, 0 };
GdkPoint last_pnt = { 0, 0 };
gboolean first = TRUE;
g_assert (obj != NULL);
center_pnt = obj->points;
if (!center_pnt)
return; /* no-line */
/* NULL out these points free later */
obj->points = NULL;
/* Go around all the points creating line points */
/* Next point defines the radius */
outer_radius_pnt = center_pnt->next; /* this defines the vetices */
if (!outer_radius_pnt)
{
#ifdef DEBUG
g_warning ("Internal error in star - no outer vertice point \n");
#endif /* DEBUG */
return;
}
inner_radius_pnt = outer_radius_pnt->next; /* this defines the vetices */
if (!inner_radius_pnt)
{
#ifdef DEBUG
g_warning ("Internal error in star - no inner vertice point \n");
#endif /* DEBUG */
return;
}
shift_x = outer_radius_pnt->pnt.x - center_pnt->pnt.x;
shift_y = outer_radius_pnt->pnt.y - center_pnt->pnt.y;
outer_radius = sqrt ((shift_x*shift_x) + (shift_y*shift_y));
/* Lines */
ang_grid = 2.0 * G_PI / (2.0 * (gdouble) obj->type_data);
offset_angle = atan2 (shift_y, shift_x);
shift_x = inner_radius_pnt->pnt.x - center_pnt->pnt.x;
shift_y = inner_radius_pnt->pnt.y - center_pnt->pnt.y;
inner_radius = sqrt ((shift_x * shift_x) + (shift_y * shift_y));
for (loop = 0 ; loop < 2 * obj->type_data ; loop++)
{
gdouble lx, ly;
GdkPoint calc_pnt;
ang_loop = (gdouble)loop * ang_grid + offset_angle;
if (loop % 2)
{
lx = inner_radius * cos (ang_loop);
ly = inner_radius * sin (ang_loop);
}
else
{
lx = outer_radius * cos (ang_loop);
ly = outer_radius * sin (ang_loop);
}
calc_pnt.x = RINT (lx + center_pnt->pnt.x);
calc_pnt.y = RINT (ly + center_pnt->pnt.y);
if (!first)
{
if (calc_pnt.x == last_pnt.x && calc_pnt.y == last_pnt.y)
{
continue;
}
}
d_pnt_add_line (obj, calc_pnt.x, calc_pnt.y, 0);
last_pnt = calc_pnt;
if (first)
{
first_pnt = calc_pnt;
first = FALSE;
}
}
d_pnt_add_line (obj, first_pnt.x, first_pnt.y, 0);
/* Free old pnts */
d_delete_dobjpoints (center_pnt);
/* hey we're a line now */
obj->type = LINE;
obj->class = &dobj_class[LINE];
}
static GfigObject *
d_copy_poly (GfigObject *obj)
{
GfigObject *np;
g_assert (obj->type == POLY);
np = d_new_object (POLY, obj->points->pnt.x, obj->points->pnt.y);
np->points->next = d_copy_dobjpoints (obj->points->next);
np->type_data = obj->type_data;
return np;
}
void
Fix a bunch of warnings from Sparse: 2004-11-13 Manish Singh <yosh@gimp.org> Fix a bunch of warnings from Sparse: * app/actions/dockable-commands.c * app/actions/layers-actions.c * app/actions/view-commands.c * app/base/pixel-surround.c * app/config/gimpconfig-utils.c * app/config/gimpscanner.c * app/core/gimpbrushgenerated.c * app/core/gimpcontainer.c * app/core/gimpimage.c * app/dialogs/palette-import-dialog.c * app/file/gimprecentlist.c * app/plug-in/plug-in-params.c * app/text/gimptext-compat.c * app/text/gimptext-parasite.c * app/vectors/gimpbezierstroke.c * app/vectors/gimpstroke.c * app/widgets/gimpcellrendereraccel.c * app/widgets/gimpselectiondata.c * app/xcf/xcf.c * libgimp/gimp.c * libgimpthumb/gimpthumb-utils.c * libgimpthumb/gimpthumbnail.c * modules/cdisplay_proof.c * plug-ins/Lighting/lighting_ui.c * plug-ins/common/csource.c * plug-ins/common/glasstile.c * plug-ins/common/nova.c * plug-ins/common/pcx.c * plug-ins/common/pnm.c * plug-ins/common/randomize.c * plug-ins/common/screenshot.c * plug-ins/common/sel_gauss.c * plug-ins/common/spheredesigner.c * plug-ins/common/wind.c * plug-ins/gfig/gfig-dialog.c * plug-ins/gfig/gfig-dobject.c * plug-ins/gimpressionist/gimpressionist.c * plug-ins/ifscompose/ifscompose.c * plug-ins/print/gimp_main_window.c * plug-ins/print/print.c: Cleanup integer vs. pointer confusion. * app/base/temp-buf.c * app/dialogs/about-dialog.c * plug-ins/common/bumpmap.c * plug-ins/common/jigsaw.c * plug-ins/gfig/gfig-dobject.c: Cosmetic cleanups. * app/config/gimpconfig-deserialize.c * app/config/gimpconfig-path.c * app/config/gimpconfigwriter.c * app/core/gimpgradient.c * app/tools/gimpdrawtool.c * plug-ins/common/nlfilt.c * plug-ins/common/unsharp.c * plug-ins/common/zealouscrop.c: Define inline functions before they are used. * app/core/gimpdrawable-blend.c: PixelRegion definition was changed some time ago, but the initialization here didn't change. Fix it. * app/plug-in/plug-in-rc.c (plug_in_extra_deserialize): No need to assign token twice in a row. * libgimpbase/gimpdatafiles.c (gimp_datafiles_read_directories): No need to initialize file_data, since the code fills out all the fields. * plug-ins/common/CML_explorer.c * plug-ins/common/vpropagate.c: Declare function pointers fully. * plug-ins/common/grid.c (pix_composite): G_INLINE_FUNC isn't needed, we assume we can use the "inline" keyword always. * plug-ins/common/psd_save.c * plug-ins/common/vinvert.c * plug-ins/gfig/gfig-arc.c * plug-ins/gfig/gfig-bezier.c * plug-ins/gfig/gfig-circle.c * plug-ins/gfig/gfig-dialog.c * plug-ins/gfig/gfig-dobject.c * plug-ins/gfig/gfig-ellipse.c * plug-ins/gfig/gfig-line.c * plug-ins/gfig/gfig-poly.c * plug-ins/gfig/gfig-spiral.c * plug-ins/gfig/gfig-star.c * plug-ins/gfig/gfig.c * plug-ins/gimpressionist/orientmap.c * plug-ins/gimpressionist/placement.c * plug-ins/gimpressionist/sizemap.c * plug-ins/imagemap/imap_grid.c * plug-ins/imagemap/imap_main.c * plug-ins/imagemap/imap_preferences.c * plug-ins/imagemap/imap_settings.c * plug-ins/maze/maze.c * plug-ins/sel2path/curve.c * plug-ins/sel2path/fit.c * plug-ins/sel2path/pxl-outline.c * plug-ins/sel2path/spline.c * plug-ins/xjt/xjt.c: Functions with no args should be declared with (void). * plug-ins/common/retinex.c (MSRCR): Initialize max_preview to quiet the compiler.
2004-11-14 10:50:33 +08:00
d_poly_object_class_init (void)
{
GfigObjectClass *class = &dobj_class[POLY];
class->type = POLY;
class->name = "POLY";
class->drawfunc = d_draw_poly;
class->paintfunc = d_paint_poly;
class->copyfunc = d_copy_poly;
class->update = d_update_poly;
}
static void
d_update_poly (GdkPoint *pnt)
{
DobjPoints *center_pnt;
DobjPoints *edge_pnt;
center_pnt = obj_creating->points;
if (!center_pnt)
return; /* No points */
if ((edge_pnt = center_pnt->next))
{
edge_pnt->pnt = *pnt;
}
else
{
d_pnt_add_line (obj_creating, pnt->x, pnt->y, -1);
}
}
void
d_poly_start (GdkPoint *pnt,
gboolean shift_down)
{
obj_creating = d_new_object (POLY, pnt->x, pnt->y);
obj_creating->type_data = poly_num_sides;
}
void
d_poly_end (GimpGfig *gfig,
GdkPoint *pnt,
gboolean shift_down)
{
add_to_all_obj (gfig, gfig_context->current_obj, obj_creating);
obj_creating = NULL;
}