Adding upstream version 2.10.36.upstream/2.10.36

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 316 insertions, 0 deletions

diff --git a/plug-ins/gfig/gfig-spiral.c b/plug-ins/gfig/gfig-spiral.c
new file mode 100644
index 0000000..fbb56cf
--- /dev/null
+++ b/plug-ins/gfig/gfig-spiral.c
@@ -0,0 +1,316 @@
+/*
+ * 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 <stdlib.h>
+
+#include <libgimp/gimp.h>
+#include <libgimp/gimpui.h>
+
+#include "gfig.h"
+#include "gfig-dobject.h"
+#include "gfig-line.h"
+#include "gfig-spiral.h"
+#include "gfig-dialog.h"
+
+#include "libgimp/stdplugins-intl.h"
+
+static void        d_draw_spiral   (GfigObject *obj,
+                                    cairo_t    *cr);
+static void        d_paint_spiral  (GfigObject *obj);
+static GfigObject *d_copy_spiral   (GfigObject *obj);
+
+static void        d_update_spiral (GdkPoint  *pnt);
+
+static gint spiral_num_turns = 4; /* Default to 4 turns */
+static gint spiral_toggle    = 0; /* 0 = clockwise -1 = anti-clockwise */
+
+void
+tool_options_spiral (GtkWidget *notebook)
+{
+  GtkWidget *sides;
+
+  sides = num_sides_widget (_("Spiral Number of Turns"),
+                            &spiral_num_turns, &spiral_toggle, 1, 20);
+  gtk_notebook_append_page (GTK_NOTEBOOK (notebook), sides, NULL);
+}
+
+static void
+d_draw_spiral (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;
+  gdouble     sp_cons;
+  gint        loop;
+  GdkPoint    start_pnt = { 0, 0 };
+  gboolean    do_line = FALSE;
+  gint        clock_wise = 1;
+
+  center_pnt = obj->points;
+
+  if (!center_pnt)
+    return; /* End-of-line */
+
+  /* First point is the center */
+  /* Just draw a control point around it */
+
+  draw_sqr (&center_pnt->pnt, obj == gfig_context->selected_obj, cr);
+
+  /* Next point defines the radius */
+  radius_pnt = center_pnt->next; /* this defines the vetices */
+
+  if (!radius_pnt)
+    {
+#ifdef DEBUG
+      g_warning ("Internal error in spiral - no vertice point \n");
+#endif /* DEBUG */
+      return;
+    }
+
+  /* Other control point */
+  if (obj_creating == obj)
+    draw_circle (&radius_pnt->pnt, TRUE, cr);
+  else
+    draw_sqr (&radius_pnt->pnt, obj == gfig_context->selected_obj, cr);
+
+  /* Have center and radius - draw spiral */
+
+  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));
+
+  offset_angle = atan2 (shift_y, shift_x);
+
+  clock_wise = obj->type_data / abs (obj->type_data);
+
+  if (offset_angle < 0)
+    offset_angle += 2.0 * G_PI;
+
+  sp_cons = radius/(obj->type_data * 2 * G_PI + offset_angle);
+  /* Lines */
+  ang_grid = 2.0 * G_PI / 180.0;
+
+
+  for (loop = 0 ; loop <= abs (obj->type_data * 180) +
+         clock_wise * (gint)RINT (offset_angle/ang_grid) ; loop++)
+    {
+      gdouble  lx, ly;
+      GdkPoint calc_pnt;
+
+      ang_loop = (gdouble)loop * ang_grid;
+
+      lx = sp_cons * ang_loop * cos (ang_loop)*clock_wise;
+      ly = sp_cons * ang_loop * 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;
+
+          gfig_draw_line (calc_pnt.x, calc_pnt.y, start_pnt.x, start_pnt.y, cr);
+        }
+      else
+        {
+          do_line = TRUE;
+        }
+      start_pnt = calc_pnt;
+    }
+}
+
+static void
+d_paint_spiral (GfigObject *obj)
+{
+  /* first point center */
+  /* Next point is radius */
+  gdouble    *line_pnts;
+  gint        seg_count = 0;
+  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;
+  gdouble     sp_cons;
+  gint        loop;
+  GdkPoint    last_pnt = { 0, 0 };
+  gint        clock_wise = 1;
+
+  g_assert (obj != NULL);
+
+  center_pnt = obj->points;
+
+  if (!center_pnt || !center_pnt->next)
+    return; /* no-line */
+
+  /* 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));
+
+  clock_wise = obj->type_data / abs (obj->type_data);
+
+  offset_angle = atan2 (shift_y, shift_x);
+
+  if (offset_angle < 0)
+    offset_angle += 2.0 * G_PI;
+
+  sp_cons = radius/(obj->type_data * 2.0 * G_PI + offset_angle);
+  /* Lines */
+  ang_grid = 2.0 * G_PI / 180.0;
+
+  /* count - */
+  seg_count = abs (obj->type_data * 180) + clock_wise * (gint)RINT (offset_angle/ang_grid);
+
+  line_pnts = g_new0 (gdouble, 2 * seg_count + 3);
+
+  for (loop = 0 ; loop <= seg_count; loop++)
+    {
+      gdouble  lx, ly;
+      GdkPoint calc_pnt;
+
+      ang_loop = (gdouble)loop * ang_grid;
+
+      lx = sp_cons * ang_loop * cos (ang_loop)*clock_wise;
+      ly = sp_cons * ang_loop * 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 (!loop)
+        {
+          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;
+    }
+
+  /* Scale before drawing */
+  if (selvals.scaletoimage)
+    scale_to_original_xy (&line_pnts[0], i / 2);
+  else
+    scale_to_xy (&line_pnts[0], i / 2);
+
+  /* One go */
+  if (obj->style.paint_type == PAINT_BRUSH_TYPE)
+    {
+      gfig_paint (selvals.brshtype,
+                  gfig_context->drawable_id,
+                  i, line_pnts);
+    }
+
+  g_free (line_pnts);
+}
+
+static GfigObject *
+d_copy_spiral (GfigObject *obj)
+{
+  GfigObject *np;
+
+  g_assert (obj->type == SPIRAL);
+
+  np = d_new_object (SPIRAL, 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
+d_spiral_object_class_init (void)
+{
+  GfigObjectClass *class = &dobj_class[SPIRAL];
+
+  class->type      = SPIRAL;
+  class->name      = "SPIRAL";
+  class->drawfunc  = d_draw_spiral;
+  class->paintfunc = d_paint_spiral;
+  class->copyfunc  = d_copy_spiral;
+  class->update    = d_update_spiral;
+}
+
+static void
+d_update_spiral (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
+    {
+      /* Radius is a few pixels away */
+      /* First edge point */
+      d_pnt_add_line (obj_creating, pnt->x, pnt->y, -1);
+    }
+}
+
+void
+d_spiral_start (GdkPoint *pnt,
+                gboolean  shift_down)
+{
+  obj_creating = d_new_object (SPIRAL, pnt->x, pnt->y);
+  obj_creating->type_data = spiral_num_turns * ((spiral_toggle == 0) ? 1 : -1);
+}
+
+void
+d_spiral_end (GdkPoint *pnt,
+              gboolean  shift_down)
+{
+  add_to_all_obj (gfig_context->current_obj, obj_creating);
+  obj_creating = NULL;
+}