示例#1
0
static void
d_paint_rectangle (GfigObject *obj)
{
  DobjPoints *first_pnt;
  DobjPoints *second_pnt;
  gdouble     dpnts[4];

  g_assert (obj != NULL);

  /* Drawing rectangles is hard .
   * 1) select rectangle
   * 2) stroke it
   */
  first_pnt = obj->points;

  if (!first_pnt)
    return; /* End-of-line */

  second_pnt = first_pnt->next;

  if (!second_pnt)
    {
      g_error ("Internal error - rectangle no second pnt");
    }

  dpnts[0] = (gdouble) MIN (first_pnt->pnt.x, second_pnt->pnt.x);
  dpnts[1] = (gdouble) MIN (first_pnt->pnt.y, second_pnt->pnt.y);
  dpnts[2] = (gdouble) MAX (first_pnt->pnt.x, second_pnt->pnt.x);
  dpnts[3] = (gdouble) MAX (first_pnt->pnt.y, second_pnt->pnt.y);

  /* Scale before drawing */
  if (selvals.scaletoimage)
    scale_to_original_xy (&dpnts[0], 2);
  else
    scale_to_xy (&dpnts[0], 2);

  gimp_context_push ();
  gimp_context_set_feather (selopt.feather);
  gimp_context_set_feather_radius (selopt.feather_radius, selopt.feather_radius);
  gimp_image_select_rectangle (gfig_context->image_id,
                               selopt.type,
                               dpnts[0], dpnts[1],
                               dpnts[2] - dpnts[0],
                               dpnts[3] - dpnts[1]);
  gimp_context_pop ();

  paint_layer_fill (dpnts[0], dpnts[1], dpnts[2], dpnts[3]);

  if (obj->style.paint_type == PAINT_BRUSH_TYPE)
    gimp_edit_stroke (gfig_context->drawable_id);
}
示例#2
0
static void
d_paint_line (GfigObject *obj)
{
  DobjPoints *spnt;
  gdouble    *line_pnts;
  gint        seg_count = 0;
  gint        i = 0;

  for (spnt = obj->points; spnt; spnt = spnt->next)
    seg_count++;

  if (!seg_count)
    return; /* no-line */

  line_pnts = g_new0 (gdouble, 2 * seg_count + 1);

  /* Go around all the points drawing a line from one to the next */
  for (spnt = obj->points; spnt; spnt = spnt->next)
    {
      line_pnts[i++] = spnt->pnt.x;
      line_pnts[i++] = spnt->pnt.y;
    }

  /* 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,
                  seg_count * 2, line_pnts);
    }

  g_free (line_pnts);
}
示例#3
0
文件: gfig-spiral.c 项目: Minoos/gimp
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 * 180.0) + 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);
}
示例#4
0
static void
arc_drawing_details (GfigObject *obj,
                     gdouble    *minang,
                     GdkPoint   *center_pnt,
                     gdouble    *arcang,
                     gdouble    *radius,
                     gboolean    draw_cnts,
                     gboolean    do_scale)
{
  DobjPoints *pnt1 = NULL;
  DobjPoints *pnt2 = NULL;
  DobjPoints *pnt3 = NULL;
  DobjPoints  dpnts[3];
  gdouble     ang1, ang2, ang3;
  gdouble     maxang;

  pnt1 = obj->points;

  if (!pnt1)
    return; /* Not fully drawn */

  pnt2 = pnt1->next;

  if (!pnt2)
    return; /* Not fully drawn */

  pnt3 = pnt2->next;

  if (!pnt3)
    return; /* Still not fully drawn */

  if (do_scale)
    {
      /* Adjust pnts for scaling */
      /* Warning struct copies here! and casting to double <-> int */
      /* Too complex fix me - to much hacking */
      gdouble xy[2];
      int     j;

      dpnts[0] = *pnt1;
      dpnts[1] = *pnt2;
      dpnts[2] = *pnt3;

      pnt1 = &dpnts[0];
      pnt2 = &dpnts[1];
      pnt3 = &dpnts[2];

      for (j = 0 ; j < 3; j++)
        {
          xy[0] = dpnts[j].pnt.x;
          xy[1] = dpnts[j].pnt.y;
          if (selvals.scaletoimage)
            scale_to_original_xy (&xy[0], 1);
          else
            scale_to_xy (&xy[0], 1);
          dpnts[j].pnt.x = xy[0];
          dpnts[j].pnt.y = xy[1];
        }
    }

  arc_details (&pnt1->pnt, &pnt2->pnt, &pnt3->pnt, center_pnt, radius);

  ang1 = arc_angle (&pnt1->pnt, center_pnt);
  ang2 = arc_angle (&pnt2->pnt, center_pnt);
  ang3 = arc_angle (&pnt3->pnt, center_pnt);

  /* Find min/max angle */

  maxang = ang1;

  if (ang3 > maxang)
    maxang = ang3;

  *minang = ang1;

  if (ang3 < *minang)
    *minang = ang3;

  if (ang2 > *minang && ang2 < maxang)
    *arcang = maxang - *minang;
  else
    *arcang = maxang - *minang - 360;
}
示例#5
0
static void
d_paint_star (GfigObject *obj)
{
  /* first point center */
  /* Next point is radius */
  gdouble    *line_pnts;
  gint        seg_count = 0;
  gint        i = 0;
  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;
  gdouble    *min_max;

  g_assert (obj != NULL);

  /* count - add one to close polygon */
  seg_count = 2 * obj->type_data + 1;

  center_pnt = obj->points;

  if (!center_pnt || !seg_count)
    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 */
  /* 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 */
      g_free (line_pnts);
      g_free (min_max);
      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 */
      g_free (line_pnts);
      g_free (min_max);
      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);

      /* 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)
    {
      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_id,
                                 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_id);
    }

  if (obj->style.paint_type == PAINT_BRUSH_TYPE)
    gfig_paint (selvals.brshtype, gfig_context->drawable_id, i, line_pnts);

  g_free (line_pnts);
  g_free (min_max);
}
示例#6
0
static void
d_paint_circle (GfigObject *obj)
{
  DobjPoints *center_pnt;
  DobjPoints *edge_pnt;
  gint        radius;
  gdouble     dpnts[4];

  g_assert (obj != NULL);

  center_pnt = obj->points;

  if (!center_pnt)
    return; /* End-of-line */

  edge_pnt = center_pnt->next;

  if (!edge_pnt)
    {
      g_error ("Internal error - circle no edge pnt");
    }

  radius = calc_radius (&center_pnt->pnt, &edge_pnt->pnt);

  dpnts[0] = (gdouble) center_pnt->pnt.x - radius;
  dpnts[1] = (gdouble) center_pnt->pnt.y - radius;
  dpnts[3] = dpnts[2] = (gdouble) radius * 2;

  /* Scale before drawing */
  if (selvals.scaletoimage)
    scale_to_original_xy (&dpnts[0], 2);
  else
    scale_to_xy (&dpnts[0], 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_ellipse (gfig_context->image_id,
                                 selopt.type,
                                 dpnts[0], dpnts[1],
                                 dpnts[2], dpnts[3]);
      gimp_context_pop ();

      paint_layer_fill (center_pnt->pnt.x - radius,
                        center_pnt->pnt.y - radius,
                        center_pnt->pnt.x + radius,
                        center_pnt->pnt.y + radius);
      gimp_selection_none (gfig_context->image_id);
    }

  /* Drawing a circle may be harder than stroking a circular selection,
   * but we have to do it or we will not be able to draw outside of the
   * layer. */
  if (obj->style.paint_type == PAINT_BRUSH_TYPE)
    {
      const gdouble r = dpnts[2] / 2;
      const gdouble cx = dpnts[0] + r, cy = dpnts[1] + r;
      gdouble       line_pnts[362];
      gdouble       angle = 0;
      gint          i = 0;

      while (i < 362)
        {
          static const gdouble step = 2 * G_PI / 180;

          line_pnts[i++] = cx + r * cos (angle);
          line_pnts[i++] = cy + r * sin (angle);
          angle += step;
        }

      gfig_paint (selvals.brshtype, gfig_context->drawable_id, i, line_pnts);
    }
}