gerb_image.c

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/*
 * gEDA - GNU Electronic Design Automation
 * This files is a part of gerbv.
 *
 *   Copyright (C) 2000-2003 Stefan Petersen (spe@stacken.kth.se)
 *
 * $Id$
 *
 * 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 2 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111 USA
 */
 
#include "gerbv.h"
 
#include <stdlib.h>
#include <string.h>
#include <math.h>
 
#include "common.h"
#include "gerb_image.h"
#include "gerber.h"
#include "amacro.h"
 
typedef struct {
    int oldAperture;
    int newAperture;
} gerb_translation_entry_t;
 
gerbv_image_t *
gerbv_create_image(gerbv_image_t *image, const gchar *type)
{
    gerbv_destroy_image(image);
    
    /* Malloc space for image */
    if (NULL == (image = g_new0(gerbv_image_t, 1))) {
       return NULL;
    }
 
    /* Malloc space for image->netlist */
    if (NULL == (image->netlist = g_new0(gerbv_net_t, 1))) {
       g_free(image);
       return NULL;
    }
 
    /* Malloc space for image->info */
    if (NULL == (image->info = g_new0(gerbv_image_info_t, 1))) {
       g_free(image->netlist);
       g_free(image);
       return NULL;
    }
 
    /* Set aside position for stats struct */
    image->gerbv_stats = NULL;
    image->drill_stats = NULL;
 
    image->info->min_x = HUGE_VAL;
    image->info->min_y = HUGE_VAL;
    image->info->max_x = -HUGE_VAL;
    image->info->max_y = -HUGE_VAL;
 
    /* create our first layer and fill with non-zero default values */
    image->layers = g_new0 (gerbv_layer_t, 1);
    image->layers->stepAndRepeat.X = 1;
    image->layers->stepAndRepeat.Y = 1;
    image->layers->polarity = GERBV_POLARITY_DARK;
    
    /* create our first netstate and fill with non-zero default values */
    image->states = g_new0 (gerbv_netstate_t, 1);
    image->states->scaleA = 1;
    image->states->scaleB = 1;
 
    /* fill in some values for our first net */
    image->netlist->layer = image->layers;
    image->netlist->state = image->states;
    
    if (type == NULL)
       image->info->type = g_strdup (_("unknown"));
    else
       image->info->type = g_strdup (type);
 
    /* the individual file parsers will have to set this. */
    image->info->attr_list = NULL;
    image->info->n_attr = 0;
 
    return image;
}
 
 
void
gerbv_destroy_image(gerbv_image_t *image)
{
    int i;
    gerbv_net_t *net, *tmp;
    gerbv_layer_t *layer;
    gerbv_netstate_t *state;
    gerbv_simplified_amacro_t *sam,*sam2;
 
    if(image==NULL)
        return;
        
    /*
     * Free apertures
     */
    for (i = 0; i < APERTURE_MAX; i++)
       if (image->aperture[i] != NULL) {
           for (sam = image->aperture[i]->simplified; sam != NULL; ){
             sam2 = sam->next;
              g_free (sam);
              sam = sam2;
           }
           /* Free block aperture net list */
           if (image->aperture[i]->type == GERBV_APTYPE_BLOCK) {
              gerbv_net_t *bnet = image->aperture[i]->block_netlist;
              while (bnet != NULL) {
                  gerbv_net_t *bnext = bnet->next;
                  if (bnet->cirseg)
                     g_free (bnet->cirseg);
                  if (bnet->label)
                     g_string_free (bnet->label, TRUE);
                  g_free (bnet);
                  bnet = bnext;
              }
           }
 
           g_free(image->aperture[i]);
           image->aperture[i] = NULL;
       }
 
    /*
     * Free aperture macro
     */
     
    if (image->amacro) {
       free_amacro(image->amacro);
    }
 
    /*
     * Free format
     */
    if (image->format)
       g_free(image->format);
    
    /*
     * Free info
     */
    if (image->info) {
       g_free(image->info->name);
       g_free(image->info->type);
       gerbv_attribute_destroy_HID_attribute (image->info->attr_list, image->info->n_attr);
       g_free(image->info);
    }
    
    /*
     * Free netlist
     */
    for (net = image->netlist; net != NULL; ) {
       tmp = net; 
       net = net->next; 
       if (tmp->cirseg != NULL) {
           g_free(tmp->cirseg);
           tmp->cirseg = NULL;
       }
       if (tmp->label) {
              g_string_free (tmp->label, TRUE);
       }
       g_free(tmp);
       tmp = NULL;
    }
    for (layer = image->layers; layer != NULL; ) {
       gerbv_layer_t *tempLayer = layer;
       
       layer = layer->next;
       g_free (tempLayer->name);
       g_free (tempLayer);
    }
    for (state = image->states; state != NULL; ) {
       gerbv_netstate_t *tempState = state;
       
       state = state->next;
       g_free (tempState);
    }
    gerbv_stats_destroy(image->gerbv_stats);
    gerbv_drill_stats_destroy(image->drill_stats);
 
    /*
     * Free and reset the final image
     */
    g_free(image);
    image = NULL;
    
    return;
}
 
 
/*
 * Check that the parsed gerber image is complete.
 * Returned errorcodes are:
 * 0: No problems
 * 1: Missing netlist
 * 2: Missing format
 * 4: Missing apertures
 * 8: Missing info
 * It could be any of above or'ed together
 */
gerb_verify_error_t
gerbv_image_verify(gerbv_image_t const* image)
{
    gerb_verify_error_t error = GERB_IMAGE_OK;
    int i;
    gerbv_net_t *net;
    gboolean needs_aperture = FALSE;
    gboolean in_parea = FALSE;
 
    if (image->netlist == NULL) error |= GERB_IMAGE_MISSING_NETLIST;
    if (image->format == NULL)  error |= GERB_IMAGE_MISSING_FORMAT;
    if (image->info == NULL)    error |= GERB_IMAGE_MISSING_INFO;
 
    /* Check if any net actually requires an aperture (i.e., draws or
     * flashes outside a polygon area fill).  G36/G37 polygon fills
     * don't need apertures, so files using only polygon fills should
     * not trigger a missing-apertures warning. */
    if (image->netlist != NULL) {
      for (net = image->netlist->next ; net != NULL; net = net->next) {
       if (net->interpolation == GERBV_INTERPOLATION_PAREA_START)
           in_parea = TRUE;
       else if (net->interpolation == GERBV_INTERPOLATION_PAREA_END)
           in_parea = FALSE;
       else if (!in_parea &&
               (net->aperture_state == GERBV_APERTURE_STATE_ON ||
                net->aperture_state == GERBV_APERTURE_STATE_FLASH))
           needs_aperture = TRUE;
      }
    }
 
    /* If we have nets that need apertures but none are defined, complain */
    if (needs_aperture) {
      for (i = 0; i < APERTURE_MAX && image->aperture[i] == NULL; i++);
      if (i == APERTURE_MAX) error |= GERB_IMAGE_MISSING_APERTURES;
    }
 
    return error;
} /* gerb_image_verify */
 
static void
gerbv_image_aperture_state(gerbv_aperture_state_t state)
{
    switch (state) {
    case GERBV_APERTURE_STATE_OFF:
       printf(_("..state off"));
       break;
    case GERBV_APERTURE_STATE_ON:
       printf(_("..state on"));
       break;
    case GERBV_APERTURE_STATE_FLASH:
       printf(_("..state flash"));
       break;
    default:
       printf(_("..state unknown"));
    }
}
 
/* Dumps a written version of image to stdout */
void 
gerbv_image_dump(gerbv_image_t const* image)
{
    int i, j;
    gerbv_aperture_t * const* aperture;
    gerbv_net_t const * net;
 
    /* Apertures */
    printf(_("Apertures:\n"));
    aperture = image->aperture;
    for (i = 0; i < APERTURE_MAX; i++) {
       if (aperture[i]) {
           printf(_(" Aperture no:%d is an "), i);
           switch(aperture[i]->type) {
           case GERBV_APTYPE_CIRCLE:
              printf(_("circle"));
              break;
           case GERBV_APTYPE_RECTANGLE:
              printf(_("rectangle"));
              break;
           case GERBV_APTYPE_OVAL:
              printf(_("oval"));
              break;
           case GERBV_APTYPE_POLYGON:
              printf(_("polygon"));
              break;
           case GERBV_APTYPE_MACRO:
              printf(_("macro"));
              break;
           default:
              printf(_("unknown"));
           }
           for (j = 0; j < aperture[i]->nuf_parameters; j++) {
              printf(" %f", aperture[i]->parameter[j]);
           }
           printf("\n");
       }
    }
 
    /* Netlist */
    net = image->netlist;
    while (net){
       printf(_("(%f,%f)->(%f,%f) with %d ("), net->start_x, net->start_y,
              net->stop_x, net->stop_y, net->aperture);
       printf("%s", _(gerbv_interpolation_name(net->interpolation)));
       gerbv_image_aperture_state(net->aperture_state);
       printf(")\n");
       net = net->next;
    }
} /* gerbv_image_dump */
 
 
gerbv_layer_t *
gerbv_image_return_new_layer (gerbv_layer_t *previousLayer)
{
    gerbv_layer_t *newLayer = g_new0 (gerbv_layer_t, 1);
    
    *newLayer = *previousLayer;
    previousLayer->next = newLayer;
    /* clear this boolean so we only draw the knockout once */
    newLayer->knockout.firstInstance = FALSE;
    newLayer->name = NULL;
    newLayer->next = NULL;
    
    return newLayer;
} /* gerbv_image_return_new_layer */
 
 
gerbv_netstate_t *
gerbv_image_return_new_netstate (gerbv_netstate_t *previousState)
{
    gerbv_netstate_t *newState = g_new0 (gerbv_netstate_t, 1);
    
    *newState = *previousState;
    previousState->next = newState;
    /* `rotation` (LR), `mirrorState` (LM), `unit` (MO), and `axisSelect`
     * (AS) all persist across netstate boundaries per the Gerber X2
     * spec — they're set by the corresponding RS274X command and stay
     * active until the next explicit command. The struct copy above
     * propagates them correctly; do NOT reset them here.
     *
     * scaleA/scaleB (LS) carry a pre-existing reset that has the same
     * spec-violating behaviour. Left alone to keep this PR scoped to
     * the LR fix Stefan flagged — a separate change should remove the
     * scale reset too. */
    newState->next = NULL;
    
    return newState;
} /* gerbv_image_return_new_netstate */
 
gerbv_layer_t *
gerbv_image_duplicate_layer (gerbv_layer_t *oldLayer) {
    gerbv_layer_t *newLayer = g_new (gerbv_layer_t,1);
    
    *newLayer = *oldLayer;
    newLayer->name = g_strdup (oldLayer->name);
    newLayer->next = NULL;
    return newLayer;
}
 
static gerbv_netstate_t *
gerbv_image_duplicate_state (gerbv_netstate_t *oldState)
{
       gerbv_netstate_t *newState = g_new (gerbv_netstate_t, 1);
 
       *newState = *oldState;
       newState->next = NULL;
       return newState;
}
 
static gerbv_aperture_t *
gerbv_image_duplicate_aperture (gerbv_aperture_t *oldAperture)
{
    gerbv_aperture_t *newAperture = g_new0 (gerbv_aperture_t,1);
    gerbv_simplified_amacro_t *simplifiedMacro, *tempSimplified;
 
    *newAperture = *oldAperture;
 
    /* delete the amacro section, since we really don't need it anymore
    now that we have the simplified section */
    newAperture->amacro = NULL;
    newAperture->simplified = NULL;
 
    /* copy any simplified macros over */
    tempSimplified = NULL;
    for (simplifiedMacro = oldAperture->simplified; simplifiedMacro != NULL; simplifiedMacro = simplifiedMacro->next) {
       gerbv_simplified_amacro_t *newSimplified = g_new0 (gerbv_simplified_amacro_t,1);
       *newSimplified = *simplifiedMacro;
       if (tempSimplified)
         tempSimplified->next = newSimplified;
       else
         newAperture->simplified = newSimplified;
       tempSimplified = newSimplified;
    }
    return newAperture;
}
 
static void
gerbv_image_copy_all_nets (gerbv_image_t *sourceImage,
              gerbv_image_t *destImage, gerbv_layer_t *lastLayer,
              gerbv_netstate_t *lastState, gerbv_net_t *lastNet,
              gerbv_user_transformation_t *trans,
              GArray *translationTable)
{
       /* NOTE: destImage already contains apertures and data,
        * latest data is: lastLayer, lastState, lastNet. */
 
       gerbv_net_t *currentNet, *newNet;
       gerbv_layer_t *srcLayer = NULL;
       gerbv_netstate_t *srcState = NULL;
       gerbv_aperture_type_t aper_type;
       gerbv_aperture_t *aper;
       gerbv_simplified_amacro_t *sam;
       int *trans_apers = NULL; /* Transformed apertures */
       int aper_last_id = 0;
       guint  err_scale_circle = 0,
              err_scale_line_macro = 0,
              err_scale_poly_macro = 0,
              err_scale_thermo_macro = 0,
              err_scale_moire_macro = 0,
              err_unknown_aperture = 0,
              err_unknown_macro_aperture = 0,
              err_rotate_oval = 0,
              err_rotate_rect = 0;
 
       if (trans && (trans->mirrorAroundX || trans->mirrorAroundY)) {
              if (sourceImage->layertype != GERBV_LAYERTYPE_DRILL) {
                     GERB_COMPILE_ERROR(_("Exporting mirrored file "
                                          "is not supported!"));
                     return;
              }
       }
 
       if (trans && trans->inverted) {
              GERB_COMPILE_ERROR(_("Exporting inverted file "
                                   "is not supported!"));
              return;
       }
 
       if (trans) {
              /* Find last used aperture to add transformed apertures if
               * needed */
              for (aper_last_id = APERTURE_MAX - 1; aper_last_id > 0;
                                          aper_last_id--) {
                     if (destImage->aperture[aper_last_id] != NULL)
                            break;
              }
 
              trans_apers = g_new (int, aper_last_id + 1);
              /* Initialize trans_apers array */
              for (int i = 0; i < aper_last_id + 1; i++)
                     trans_apers[i] = -1;
       }
 
       for (currentNet = sourceImage->netlist; currentNet != NULL;
                     currentNet = currentNet->next) {
 
              /* Check for any new layers and duplicate them if needed.
               * Compare against the source pointer, not the duplicated
               * pointer, to avoid creating redundant duplicates when
               * consecutive nets share the same layer. */
              if (currentNet->layer != srcLayer) {
                     srcLayer = currentNet->layer;
                     lastLayer->next =
                            gerbv_image_duplicate_layer (currentNet->layer);
                     lastLayer = lastLayer->next;
              }
 
              /* Check for any new states and duplicate them if needed.
               * Same source-pointer tracking as layers above. */
              if (currentNet->state != srcState) {
                     srcState = currentNet->state;
                     lastState->next =
                            gerbv_image_duplicate_state (currentNet->state);
                     lastState = lastState->next;
              }
 
              /* Create and copy the actual net over */
              newNet = g_new (gerbv_net_t, 1);
              *newNet = *currentNet;
 
              if (currentNet->cirseg) {
                     newNet->cirseg = g_new (gerbv_cirseg_t, 1);
                     *(newNet->cirseg) = *(currentNet->cirseg);
              }
 
              if (currentNet->label)
                     newNet->label = g_string_new (currentNet->label->str);
              else
                     newNet->label = NULL;
 
              newNet->state = lastState;
              newNet->layer = lastLayer;
 
              if (lastNet)
                     lastNet->next = newNet;
              else
                     destImage->netlist = newNet;
 
              lastNet = newNet;
 
              /* Check if we need to translate the aperture number */
              if (translationTable) {
                     for (guint i = 0; i < translationTable->len; i++) {
                            gerb_translation_entry_t translationEntry;
 
                            translationEntry =
                                   g_array_index (translationTable,
                                          gerb_translation_entry_t, i);
 
                            if (translationEntry.oldAperture ==
                                          newNet->aperture) {
                                   newNet->aperture =
                                          translationEntry.newAperture;
                                   break;
                            }
                     }
              }
 
              if (trans == NULL)
                     continue;
 
              /* Transforming coords */
              gerbv_transform_coord (&newNet->start_x,
                            &newNet->start_y, trans);
              gerbv_transform_coord (&newNet->stop_x,
                            &newNet->stop_y, trans);
 
              if (newNet->cirseg) {
                     /* Circular interpolation only exported by start, stop
                      * end center coordinates. */
                     gerbv_transform_coord (&newNet->cirseg->cp_x,
                            &newNet->cirseg->cp_y, trans);
              }
 
              if (destImage->aperture[newNet->aperture] == NULL)
                     continue;
 
              if (trans->scaleX == 1.0 && trans->scaleY == 1.0
              && fabs(trans->rotation) < GERBV_PRECISION_ANGLE_RAD)
                     continue;
 
              /* Aperture is already transformed, use it */
              if (trans_apers[newNet->aperture] != -1) {
                     newNet->aperture = trans_apers[newNet->aperture];
                     continue;
              }
 
              /* Transforming apertures */
              aper_type = destImage->aperture[newNet->aperture]->type;
              switch (aper_type) {
              case GERBV_APTYPE_NONE:
              case GERBV_APTYPE_POLYGON:
                     break;
 
              case GERBV_APTYPE_CIRCLE:
                     if (trans->scaleX == trans->scaleY
                                   && trans->scaleX == 1.0) {
                            break;
                     }
 
                     if (trans->scaleX == trans->scaleY) {
                            aper = gerbv_image_duplicate_aperture (
                                          destImage->aperture[
                                                 newNet->aperture]);
                            aper->parameter[0] *= trans->scaleX;
 
                            trans_apers[newNet->aperture] = ++aper_last_id;
                            destImage->aperture[aper_last_id] = aper;
                            newNet->aperture = aper_last_id;
                     } else {
                            err_scale_circle++;
                     }
                     break;
 
              case GERBV_APTYPE_RECTANGLE:
              case GERBV_APTYPE_OVAL:
                     if (trans->scaleX == 1.0 && trans->scaleY == 1.0
                     &&  fabs(fabs(trans->rotation) - M_PI)
                                          < GERBV_PRECISION_ANGLE_RAD)
                            break;
 
                     aper = gerbv_image_duplicate_aperture (
                                   destImage->aperture[newNet->aperture]);
                     aper->parameter[0] *= trans->scaleX;
                     aper->parameter[1] *= trans->scaleY;
 
                     if (fabs(fabs(trans->rotation) - M_PI_2)
                                          < GERBV_PRECISION_ANGLE_RAD
                     ||  fabs(fabs(trans->rotation) - (M_PI+M_PI_2))
                                          < GERBV_PRECISION_ANGLE_RAD) {
                            double t = aper->parameter[0];
                            aper->parameter[0] = aper->parameter[1];
                            aper->parameter[1] = t;
                     } else {
                            if (aper_type == GERBV_APTYPE_RECTANGLE)
                                   err_rotate_rect++;   /* TODO: make line21 macro */
                            else
                                   err_rotate_oval++;
 
                            break;
                     }
 
                     trans_apers[newNet->aperture] = ++aper_last_id;
                     destImage->aperture[aper_last_id] = aper;
                     newNet->aperture = aper_last_id;
 
                     break;
 
              case GERBV_APTYPE_MACRO:
                     aper = gerbv_image_duplicate_aperture (
                                   destImage->aperture[newNet->aperture]);
                     sam = aper->simplified;
 
                     for (; sam != NULL; sam = sam->next) {
                            switch (sam->type) {
                            case GERBV_APTYPE_MACRO_CIRCLE:
                                   sam->parameter[CIRCLE_CENTER_X] *=
                                                        trans->scaleX;
                                   sam->parameter[CIRCLE_CENTER_Y] *=
                                                        trans->scaleY;
                                   sam->parameter[CIRCLE_ROTATION] +=
                                          RAD2DEG(trans->rotation);
 
                                   if (trans->scaleX != trans->scaleY) {
                                          err_scale_circle++;
                                          break;
                                   }
                                   sam->parameter[CIRCLE_DIAMETER] *=
                                                        trans->scaleX;
                                   break;
 
                            case GERBV_APTYPE_MACRO_LINE20:
                                   /* Vector line rectangle */
                                   if (trans->scaleX == trans->scaleY) {
                                          sam->parameter[LINE20_LINE_WIDTH] *=
                                                        trans->scaleX;
                                   } else if (sam->parameter[LINE20_START_X] ==
                                                 sam->parameter[LINE20_END_X]) {
                                          sam->parameter[LINE20_LINE_WIDTH] *=
                                                 trans->scaleX;       /* Vertical */
                                   } else if (sam->parameter[LINE20_START_Y] ==
                                                 sam->parameter[LINE20_END_Y]) {
                                          sam->parameter[LINE20_LINE_WIDTH] *=
                                                 trans->scaleY;       /* Horizontal */
                                   } else {
                                          /* TODO: make outline macro */
                                          err_scale_line_macro++;
                                          break;
                                   }
 
                                   sam->parameter[LINE20_START_X] *=
                                                 trans->scaleX;
                                   sam->parameter[LINE20_START_Y] *=
                                                 trans->scaleY;
                                   sam->parameter[LINE20_END_X] *=
                                                 trans->scaleX;
                                   sam->parameter[LINE20_END_Y] *=
                                                 trans->scaleY;
 
                                   /* LINE20_START_X, LINE20_START_Y,
                                    * LINE20_END_X, LINE20_END_Y are not
                                    * rotated, change only rotation angle */
                                   sam->parameter[LINE20_ROTATION] +=
                                          RAD2DEG(trans->rotation);
                                   break;
 
/* Compile time check if LINE21 and LINE22 parameters indexes are equal */
#if (LINE21_WIDTH != LINE22_WIDTH) \
 || (LINE21_HEIGHT != LINE22_HEIGHT) \
 || (LINE21_ROTATION != LINE22_ROTATION) \
 || (LINE21_CENTER_X != LINE22_LOWER_LEFT_X) \
 || (LINE21_CENTER_Y != LINE22_LOWER_LEFT_Y)
# error "LINE21 and LINE22 indexes are not equal"
#endif
 
                            case GERBV_APTYPE_MACRO_LINE21:
                                          /* Centered line rectangle */
                            case GERBV_APTYPE_MACRO_LINE22:
                                          /* Lower left line rectangle */
 
                                   /* Using LINE21 parameters array
                                    * indexes for LINE21 and LINE22, as
                                    * they are equal */
                                   if (trans->scaleX == trans->scaleY) {
                                          sam->parameter[LINE21_WIDTH] *=
                                                        trans->scaleX;
                                          sam->parameter[LINE21_HEIGHT] *=
                                                        trans->scaleX;
 
                                   } else if (fabs(sam->parameter[LINE21_ROTATION]) == 0
                                   || fabs(sam->parameter[LINE21_ROTATION]) == 180) {
                                          sam->parameter[LINE21_WIDTH] *=
                                                        trans->scaleX;
                                          sam->parameter[LINE21_HEIGHT] *=
                                                        trans->scaleY;
 
                                   } else if (fabs(sam->parameter[LINE21_ROTATION]) == 90
                                   || fabs(sam->parameter[LINE21_ROTATION]) == 270) {
                                          double t;
                                          t = sam->parameter[LINE21_WIDTH];
                                          sam->parameter[LINE21_WIDTH] =
                                                 trans->scaleY *
                                                 sam->parameter[
                                                        LINE21_HEIGHT];
                                          sam->parameter[LINE21_HEIGHT] =
                                                 trans->scaleX * t;
                                   } else {
                                          /* TODO: make outline macro */
                                          err_scale_line_macro++;
                                          break;
                                   }
 
                                   sam->parameter[LINE21_CENTER_X] *=
                                                        trans->scaleX;
                                   sam->parameter[LINE21_CENTER_Y] *=
                                                        trans->scaleY;
 
                                   sam->parameter[LINE21_ROTATION] +=
                                          RAD2DEG(trans->rotation);
                                   break;
 
                            case GERBV_APTYPE_MACRO_OUTLINE:
                                   for (int i = 0; i < 1 + sam->parameter[
                                                 OUTLINE_NUMBER_OF_POINTS]; i++) {
                                          sam->parameter[OUTLINE_X_IDX_OF_POINT(i)] *=
                                                        trans->scaleX;
                                          sam->parameter[OUTLINE_Y_IDX_OF_POINT(i)] *=
                                                        trans->scaleY;
                                   }
 
                                   sam->parameter[OUTLINE_ROTATION_IDX(sam->parameter)] +=
                                                        RAD2DEG(trans->rotation);
                                   break;
#if 0
{
/* TODO */
#include "main.h"
gerbv_selection_item_t sItem = {sourceImage, currentNet};
selection_add_item (&screen.selectionInfo, &sItem);
}
#endif
 
                            case GERBV_APTYPE_MACRO_POLYGON:
                                   if (trans->scaleX == trans->scaleY) {
                                          sam->parameter[POLYGON_CENTER_X]
                                                 *= trans->scaleX;
                                          sam->parameter[POLYGON_CENTER_Y]
                                                 *= trans->scaleX;
                                          sam->parameter[POLYGON_DIAMETER]
                                                 *= trans->scaleX;
                                   } else {
                                          /* TODO: make outline macro */
                                          err_scale_poly_macro++;
                                          break;
                                   }
 
                                   sam->parameter[POLYGON_ROTATION] +=
                                          RAD2DEG(trans->rotation);
                                   break;
 
                            case GERBV_APTYPE_MACRO_MOIRE:
                                   if (trans->scaleX == trans->scaleY) {
                                          sam->parameter[MOIRE_CENTER_X]
                                                 *= trans->scaleX;
                                          sam->parameter[MOIRE_CENTER_Y]
                                                 *= trans->scaleX;
                                          sam->parameter[MOIRE_OUTSIDE_DIAMETER]
                                                 *= trans->scaleX;
                                          sam->parameter[MOIRE_CIRCLE_THICKNESS]
                                                 *= trans->scaleX;
                                          sam->parameter[MOIRE_GAP_WIDTH]
                                                 *= trans->scaleX;
                                          sam->parameter[MOIRE_CROSSHAIR_THICKNESS]
                                                 *= trans->scaleX;
                                          sam->parameter[MOIRE_CROSSHAIR_LENGTH]
                                                 *= trans->scaleX;
                                   } else {
                                          err_scale_moire_macro++;
                                          break;
                                   }
 
                                   sam->parameter[MOIRE_ROTATION] +=
                                          RAD2DEG(trans->rotation);
                                   break;
 
                            case GERBV_APTYPE_MACRO_THERMAL:
                                   if (trans->scaleX == trans->scaleY) {
                                          sam->parameter[THERMAL_CENTER_X]
                                                 *= trans->scaleX;
                                          sam->parameter[THERMAL_CENTER_Y]
                                                 *= trans->scaleX;
                                          sam->parameter[THERMAL_INSIDE_DIAMETER]
                                                 *= trans->scaleX;
                                          sam->parameter[THERMAL_OUTSIDE_DIAMETER]
                                                 *= trans->scaleX;
                                          sam->parameter[THERMAL_CROSSHAIR_THICKNESS]
                                                 *= trans->scaleX;
                                   } else {
                                          err_scale_thermo_macro++;
                                          break;
                                   }
 
                                   sam->parameter[THERMAL_ROTATION] +=
                                          RAD2DEG(trans->rotation);
                                   break;
 
                            default:
                                   /* TODO: free aper if it is skipped (i.e. unused)? */
                                   err_unknown_macro_aperture++;
                            }
                     }
 
                     trans_apers[newNet->aperture] = ++aper_last_id;
                     destImage->aperture[aper_last_id] = aper;
                     newNet->aperture = aper_last_id;
 
                     break;
              default:
                     err_unknown_aperture++;
              }
       }
 
       if (err_rotate_rect)
              GERB_COMPILE_ERROR(ngettext(
                     "Can't rotate %u rectangular aperture to %.2f "
                     "degrees (non 90 multiply)!",
                     "Can't rotate %u rectangular apertures to %.2f "
                     "degrees (non 90 multiply)!", err_rotate_rect),
                     err_rotate_rect, RAD2DEG(trans->rotation));
 
       if (err_scale_line_macro)
              GERB_COMPILE_ERROR(ngettext(
                     "Can't scale %u line macro!",
                     "Can't scale %u line macros!",
                     err_scale_line_macro), err_scale_line_macro);
 
       if (err_scale_poly_macro)
              GERB_COMPILE_ERROR(ngettext(
                     "Can't scale %u polygon macro!",
                     "Can't scale %u polygon macros!",
                     err_scale_poly_macro), err_scale_poly_macro);
 
       if (err_scale_thermo_macro)
              GERB_COMPILE_ERROR(ngettext(
                     "Can't scale %u thermal macro!",
                     "Can't scale %u thermal macros!",
                     err_scale_poly_macro), err_scale_poly_macro);
 
       if (err_scale_moire_macro)
              GERB_COMPILE_ERROR(ngettext(
                     "Can't scale %u moire macro!",
                     "Can't scale %u moire macros!",
                     err_scale_poly_macro), err_scale_poly_macro);
 
       if (err_rotate_oval)
              GERB_COMPILE_ERROR(ngettext(
                     "Can't rotate %u oval aperture to %.2f "
                     "degrees (non 90 multiply)!",
                     "Can't rotate %u oval apertures to %.2f "
                     "degrees (non 90 multiply)!", err_rotate_oval),
                     err_rotate_oval, RAD2DEG(trans->rotation));
 
       if (err_scale_circle)
              GERB_COMPILE_ERROR(ngettext(
                     "Can't scale %u circle aperture to ellipse!",
                     "Can't scale %u circle apertures to ellipse!",
                     err_scale_circle), err_scale_circle);
 
       if (err_unknown_aperture)
              GERB_COMPILE_ERROR(ngettext(
                     "Skipped %u aperture with unknown type!",
                     "Skipped %u apertures with unknown type!",
                     err_unknown_aperture), err_unknown_aperture);
 
       if (err_unknown_macro_aperture)
              GERB_COMPILE_ERROR(ngettext(
                     "Skipped %u macro aperture!",
                     "Skipped %u macro apertures!",
                     err_unknown_macro_aperture),
                            err_unknown_macro_aperture);
 
       g_free (trans_apers);
}
 
gint
gerbv_image_find_existing_aperture_match (gerbv_aperture_t *checkAperture, gerbv_image_t *imageToSearch) {
    int i,j;
    gboolean isMatch;
    
    for (i = 0; i < APERTURE_MAX; i++) {
       if (imageToSearch->aperture[i] != NULL) {
         if ((imageToSearch->aperture[i]->type == checkAperture->type) &&
             (imageToSearch->aperture[i]->simplified == NULL) &&
             (imageToSearch->aperture[i]->unit == checkAperture->unit)) {
           /* check all parameters match too */
           isMatch=TRUE;
           for (j=0; j<APERTURE_PARAMETERS_MAX; j++){
             if (imageToSearch->aperture[i]->parameter[j] != checkAperture->parameter[j])
               isMatch = FALSE;
           }
           if (isMatch)
             return i;
         }          
       }
    }
    return 0;
}
 
int
gerbv_image_find_unused_aperture_number (int startIndex, gerbv_image_t *image){
    int i;
    
    for (i = startIndex; i < APERTURE_MAX; i++) {
       if (image->aperture[i] == NULL) {
         return i;
       }
    }
    return -1;
}
 
gerbv_image_t *
gerbv_image_duplicate_image (gerbv_image_t *sourceImage, gerbv_user_transformation_t *transform) {
    gerbv_image_t *newImage = gerbv_create_image(NULL, sourceImage->info->type);
    int i;
    int lastUsedApertureNumber = APERTURE_MIN - 1;
    GArray *apertureNumberTable = g_array_new(FALSE,FALSE,sizeof(gerb_translation_entry_t));
    
    newImage->layertype = sourceImage->layertype;
 
    /* Free the type string allocated by gerbv_create_image() before the
     * struct copy overwrites the pointer (would leak otherwise). */
    g_free(newImage->info->type);
 
    /* Free the sentinel netlist node — gerbv_image_copy_all_nets() will
     * replace newImage->netlist with a fresh copy of the source nets. */
    g_free(newImage->netlist);
    newImage->netlist = NULL;
 
    /* copy information layer over */
    *(newImage->info) = *(sourceImage->info);
    newImage->info->name = g_strdup (sourceImage->info->name);
    newImage->info->type = g_strdup (sourceImage->info->type);
    newImage->info->plotterFilm = g_strdup (sourceImage->info->plotterFilm);
    newImage->info->attr_list = gerbv_attribute_dup (sourceImage->info->attr_list,
               sourceImage->info->n_attr);
    
    /* copy apertures over, compressing all the numbers down for a cleaner output, and
       moving and apertures less than 10 up to the correct range */
    for (i = 0; i < APERTURE_MAX; i++) {
       if (sourceImage->aperture[i] != NULL) {
         gerbv_aperture_t *newAperture = gerbv_image_duplicate_aperture (sourceImage->aperture[i]);
 
         lastUsedApertureNumber = gerbv_image_find_unused_aperture_number (lastUsedApertureNumber + 1, newImage);
         /* store the aperture numbers (new and old) in the translation table */
         gerb_translation_entry_t translationEntry={i,lastUsedApertureNumber};
         g_array_append_val (apertureNumberTable,translationEntry);
 
         newImage->aperture[lastUsedApertureNumber] = newAperture;
       }
    }
    
    /* step through all nets and create new layers and states on the fly, since
       we really don't have any other way to figure out where states and layers are used */
    gerbv_image_copy_all_nets (sourceImage, newImage, newImage->layers, newImage->states, NULL, transform, apertureNumberTable);
    g_array_free (apertureNumberTable, TRUE);
    return newImage;
}
 
void
gerbv_image_copy_image (gerbv_image_t *sourceImage, gerbv_user_transformation_t *transform, gerbv_image_t *destinationImage) {
    int lastUsedApertureNumber = APERTURE_MIN - 1;
    int i;
    GArray *apertureNumberTable = g_array_new(FALSE,FALSE,sizeof(gerb_translation_entry_t));
    
    /* copy apertures over */
    for (i = 0; i < APERTURE_MAX; i++) {
       if (sourceImage->aperture[i] != NULL) {
         gint existingAperture = gerbv_image_find_existing_aperture_match (sourceImage->aperture[i], destinationImage);
         
         /* if we already have an existing aperture in the destination image that matches what
            we want, just use it instead */
         if (existingAperture > 0) {
              gerb_translation_entry_t translationEntry={i,existingAperture};
              g_array_append_val (apertureNumberTable,translationEntry);
         }
         /* else, create a new aperture and put it in the destination image */
         else {
              gerbv_aperture_t *newAperture = gerbv_image_duplicate_aperture (sourceImage->aperture[i]);
         
              lastUsedApertureNumber = gerbv_image_find_unused_aperture_number (lastUsedApertureNumber + 1, destinationImage);
              /* store the aperture numbers (new and old) in the translation table */
              gerb_translation_entry_t translationEntry={i,lastUsedApertureNumber};
              g_array_append_val (apertureNumberTable,translationEntry);
 
              destinationImage->aperture[lastUsedApertureNumber] = newAperture;
         }
       }
    }
    /* find the last layer, state, and net in the linked chains */
    gerbv_netstate_t *lastState;
    gerbv_layer_t *lastLayer;
    gerbv_net_t *lastNet;
    
    for (lastState = destinationImage->states; lastState->next; lastState=lastState->next){}
    for (lastLayer = destinationImage->layers; lastLayer->next; lastLayer=lastLayer->next){}
    for (lastNet = destinationImage->netlist; lastNet->next; lastNet=lastNet->next){}
    
    /* and then copy them all to the destination image, using the aperture translation table we just built */
    gerbv_image_copy_all_nets (sourceImage, destinationImage, lastLayer, lastState, lastNet, transform, apertureNumberTable);
    g_array_free (apertureNumberTable, TRUE);
}
 
void
gerbv_image_delete_net (gerbv_net_t *currentNet) {
       gerbv_net_t *tempNet;
       
       g_assert (currentNet);
       /* we have a match, so just zero out all the important data fields */
       currentNet->aperture = 0;
       currentNet->aperture_state = GERBV_APERTURE_STATE_OFF;
       
       /* if this is a polygon start, we need to erase all the rest of the
               nets in this polygon too */
       if (currentNet->interpolation == GERBV_INTERPOLATION_PAREA_START){
              for (tempNet = currentNet->next; tempNet; tempNet = tempNet->next){   
                     tempNet->aperture = 0;
                     tempNet->aperture_state = GERBV_APERTURE_STATE_OFF;
                     
                     if (tempNet->interpolation == GERBV_INTERPOLATION_PAREA_END) {
                            tempNet->interpolation = GERBV_INTERPOLATION_DELETED;
                            break;
                     }
                     /* make sure we don't leave a polygon interpolation in, since
                      it will still draw if it is */
                     tempNet->interpolation = GERBV_INTERPOLATION_DELETED;
              }
       }
       /* make sure we don't leave a polygon interpolation in, since
          it will still draw if it is */
       currentNet->interpolation = GERBV_INTERPOLATION_DELETED;
}
 
void
gerbv_image_create_rectangle_object (gerbv_image_t *image, gdouble coordinateX,
              gdouble coordinateY, gdouble width, gdouble height) {
       gerbv_net_t *currentNet;
       
       /* run through and find last net pointer */
       for (currentNet = image->netlist; currentNet->next; currentNet = currentNet->next){}
       
       /* create the polygon start node */
       currentNet = gerber_create_new_net (currentNet, NULL, NULL);
       currentNet->interpolation = GERBV_INTERPOLATION_PAREA_START;
       
       /* go to start point (we need this to create correct RS274X export code) */
       currentNet = gerber_create_new_net (currentNet, NULL, NULL);
       currentNet->interpolation = GERBV_INTERPOLATION_LINEARx1;
       currentNet->aperture_state = GERBV_APERTURE_STATE_OFF;
       currentNet->start_x = coordinateX;
       currentNet->start_y = coordinateY;
       currentNet->stop_x = coordinateX;
       currentNet->stop_y = coordinateY;
       
       /* draw the 4 corners */
       currentNet = gerber_create_new_net (currentNet, NULL, NULL);
       currentNet->interpolation = GERBV_INTERPOLATION_LINEARx1;
       currentNet->aperture_state = GERBV_APERTURE_STATE_ON;
       currentNet->start_x = coordinateX;
       currentNet->start_y = coordinateY;
       currentNet->stop_x = coordinateX + width;
       currentNet->stop_y = coordinateY;
       gerber_update_min_and_max (&currentNet->boundingBox,currentNet->stop_x,currentNet->stop_y, 
              0,0,0,0);
       gerber_update_image_min_max (&currentNet->boundingBox, 0, 0, image);
              
       currentNet = gerber_create_new_net (currentNet, NULL, NULL);
       currentNet->interpolation = GERBV_INTERPOLATION_LINEARx1;
       currentNet->aperture_state = GERBV_APERTURE_STATE_ON;
       currentNet->stop_x = coordinateX + width;
       currentNet->stop_y = coordinateY + height;
       gerber_update_min_and_max (&currentNet->boundingBox,currentNet->stop_x,currentNet->stop_y, 
              0,0,0,0);
       gerber_update_image_min_max (&currentNet->boundingBox, 0, 0, image);
       
       currentNet = gerber_create_new_net (currentNet, NULL, NULL);
       currentNet->interpolation = GERBV_INTERPOLATION_LINEARx1;
       currentNet->aperture_state = GERBV_APERTURE_STATE_ON;
       currentNet->stop_x = coordinateX;
       currentNet->stop_y = coordinateY + height;
       gerber_update_min_and_max (&currentNet->boundingBox,currentNet->stop_x,currentNet->stop_y, 
              0,0,0,0);
       gerber_update_image_min_max (&currentNet->boundingBox, 0, 0, image);
       
       currentNet = gerber_create_new_net (currentNet, NULL, NULL);
       currentNet->interpolation = GERBV_INTERPOLATION_LINEARx1;
       currentNet->aperture_state = GERBV_APERTURE_STATE_ON;
       currentNet->stop_x = coordinateX;
       currentNet->stop_y = coordinateY;
       gerber_update_min_and_max (&currentNet->boundingBox,currentNet->stop_x,currentNet->stop_y, 
              0,0,0,0);
       gerber_update_image_min_max (&currentNet->boundingBox, 0, 0, image);
       
       /* create the polygon end node */
       currentNet = gerber_create_new_net (currentNet, NULL, NULL);
       currentNet->interpolation = GERBV_INTERPOLATION_PAREA_END;
       
       return;
}
 
gerbv_net_t *
gerb_image_return_aperture_index (gerbv_image_t *image, gdouble lineWidth, int *apertureIndex){
       gerbv_net_t *currentNet;
       gerbv_aperture_t *aperture=NULL;
       int i;
              
       /* run through and find last net pointer */
       for (currentNet = image->netlist; currentNet->next; currentNet = currentNet->next){}
       
       /* try to find an existing aperture that matches the requested width and type */
       for (i = 0; i < APERTURE_MAX; i++) {
              if (image->aperture[i] != NULL) {
                     if ((image->aperture[i]->type == GERBV_APTYPE_CIRCLE) && 
                            (fabs (image->aperture[i]->parameter[0] - lineWidth) < 0.001)){
                            aperture = image->aperture[i];
                            *apertureIndex = i;
                            break;
                     }
              }
       }
 
       if (!aperture) {
              /* we didn't find a useable old aperture, so create a new one */
              if (!gerber_create_new_aperture (image, apertureIndex,
                            GERBV_APTYPE_CIRCLE, lineWidth, 0)) {
                     /* if we didn't succeed, then return */
                     return FALSE;
              }
       }
       return currentNet;
}
 
void
gerbv_image_create_arc_object (gerbv_image_t *image, gdouble centerX, gdouble centerY,
              gdouble radius, gdouble startAngle, gdouble endAngle, gdouble lineWidth,
              gerbv_aperture_type_t apertureType) {
       int apertureIndex;
       gerbv_net_t *currentNet;
       gerbv_cirseg_t cirSeg = {centerX, centerY, radius, radius, startAngle, endAngle};
       
       currentNet = gerb_image_return_aperture_index(image, lineWidth, &apertureIndex);
       
       if (!currentNet)
              return;
       
       /* draw the arc */
       currentNet = gerber_create_new_net (currentNet, NULL, NULL);
       currentNet->interpolation = GERBV_INTERPOLATION_CCW_CIRCULAR;
       currentNet->aperture_state = GERBV_APERTURE_STATE_ON;
       currentNet->aperture = apertureIndex;
       currentNet->start_x = centerX + (cos(DEG2RAD(startAngle)) * radius);
       currentNet->start_y = centerY + (sin(DEG2RAD(startAngle)) * radius);
       currentNet->stop_x = centerX + (cos(DEG2RAD(endAngle)) * radius);
       currentNet->stop_y = centerY + (sin(DEG2RAD(endAngle)) * radius);
       currentNet->cirseg = g_new0 (gerbv_cirseg_t,1);
       *(currentNet->cirseg) = cirSeg;
       
       gdouble angleDiff = currentNet->cirseg->angle2 - currentNet->cirseg->angle1;
       gint i, steps = fabs(angleDiff);
       for (i=0; i<=steps; i++){
              gdouble tempX = currentNet->cirseg->cp_x + currentNet->cirseg->width / 2.0 *
                            cos (DEG2RAD(currentNet->cirseg->angle1 +
                                          (i*angleDiff)/steps));
              gdouble tempY = currentNet->cirseg->cp_y + currentNet->cirseg->width / 2.0 *
                            sin (DEG2RAD(currentNet->cirseg->angle1 +
                                          (i*angleDiff)/steps));
              gerber_update_min_and_max (&currentNet->boundingBox,
                            tempX, tempY, 
                            lineWidth/2,lineWidth/2,
                            lineWidth/2,lineWidth/2);
       }
       gerber_update_image_min_max (&currentNet->boundingBox, 0, 0, image);  
       return;
}
 
void
gerbv_image_create_line_object (gerbv_image_t *image, gdouble startX, gdouble startY,
              gdouble endX, gdouble endY, gdouble lineWidth, gerbv_aperture_type_t apertureType) {
       int apertureIndex;
       gerbv_net_t *currentNet;
       
       currentNet = gerb_image_return_aperture_index(image, lineWidth, &apertureIndex);
       
       if (!currentNet)
              return;
       
       /* draw the line */
       currentNet = gerber_create_new_net (currentNet, NULL, NULL);
       currentNet->interpolation = GERBV_INTERPOLATION_LINEARx1;
       
       /* if the start and end coordinates are the same, use a "flash" aperture state */
       if ((fabs(startX - endX) < 0.001) && (fabs(startY - endY) < 0.001))
              currentNet->aperture_state = GERBV_APERTURE_STATE_FLASH;
       else
              currentNet->aperture_state = GERBV_APERTURE_STATE_ON;
       currentNet->aperture = apertureIndex;
       currentNet->start_x = startX;
       currentNet->start_y = startY;
       currentNet->stop_x = endX;
       currentNet->stop_y = endY;
 
       gerber_update_min_and_max (&currentNet->boundingBox,currentNet->stop_x,currentNet->stop_y, 
              lineWidth/2,lineWidth/2,lineWidth/2,lineWidth/2);
       gerber_update_min_and_max (&currentNet->boundingBox,currentNet->start_x,currentNet->start_y, 
              lineWidth/2,lineWidth/2,lineWidth/2,lineWidth/2);
       gerber_update_image_min_max (&currentNet->boundingBox, 0, 0, image);
       return;
}
 
void
gerbv_image_create_window_pane_objects (gerbv_image_t *image, gdouble lowerLeftX,
              gdouble lowerLeftY, gdouble width, gdouble height, gdouble areaReduction,
              gint paneRows, gint paneColumns, gdouble paneSeparation){
       int i,j;
       gdouble startX,startY,boxWidth,boxHeight;
       
       startX = lowerLeftX + (areaReduction * width) / 2.0;
       startY = lowerLeftY + (areaReduction * height) / 2.0;
       boxWidth = (width * (1.0 - areaReduction) - (paneSeparation * (paneColumns - 1))) / paneColumns;
       boxHeight = (height * (1.0 - areaReduction) - (paneSeparation * (paneRows - 1))) / paneRows;
       
       for (i=0; i<paneColumns; i++){
              for (j=0; j<paneRows; j++) {
                     gerbv_image_create_rectangle_object (image, startX + (i * (boxWidth + paneSeparation)),
                            startY + (j * (boxHeight + paneSeparation)),boxWidth, boxHeight);
              }
       }
 
       return;
}
              
gboolean
gerbv_image_reduce_area_of_selected_objects (GArray *selectionArray,
              gdouble areaReduction, gint paneRows, gint paneColumns, gdouble paneSeparation){
       gdouble minX,minY,maxX,maxY;
       
       for (guint i=0; i<selectionArray->len; i++) {
              gerbv_selection_item_t sItem = g_array_index (selectionArray,gerbv_selection_item_t, i);
              gerbv_image_t *image = sItem.image;
              gerbv_net_t *currentNet = sItem.net;
              
              /* determine the object type first */
              minX = HUGE_VAL;
              maxX = -HUGE_VAL;
              minY = HUGE_VAL;
              maxY = -HUGE_VAL;
              
              switch (currentNet->interpolation) {
              case GERBV_INTERPOLATION_PAREA_START:
                     /* if it's a polygon, just determine the overall area of it and delete it */
                     currentNet->interpolation = GERBV_INTERPOLATION_DELETED;
                     
                     for (currentNet = currentNet->next; currentNet; currentNet = currentNet->next){
                            if (currentNet->interpolation == GERBV_INTERPOLATION_PAREA_END)
                                   break;
                            currentNet->interpolation = GERBV_INTERPOLATION_DELETED;
                            if (currentNet->stop_x < minX)
                                   minX = currentNet->stop_x;
                            if (currentNet->stop_y < minY)
                                   minY = currentNet->stop_y;
                            if (currentNet->stop_x > maxX)
                                   maxX = currentNet->stop_x;
                            if (currentNet->stop_y > maxY)
                                   maxY = currentNet->stop_y;
                     }
                     currentNet->interpolation = GERBV_INTERPOLATION_DELETED;
 
                     break;
 
              case GERBV_INTERPOLATION_LINEARx1:
              case GERBV_INTERPOLATION_LINEARx10:
              case GERBV_INTERPOLATION_LINEARx01:
              case GERBV_INTERPOLATION_LINEARx001: {
                     gdouble dx=0,dy=0;
                     gerbv_aperture_t *apert =
                            image->aperture[currentNet->aperture];
 
                     /* figure out the overall size of this element */
                     switch (apert->type) {
                     case GERBV_APTYPE_CIRCLE :
                     case GERBV_APTYPE_OVAL :
                     case GERBV_APTYPE_POLYGON :
                            dx = dy = apert->parameter[0];
                            break;
                     case GERBV_APTYPE_RECTANGLE :
                            dx = apert->parameter[0]/2;
                            dy = apert->parameter[1]/2;
                            break;
                     default :
                            break;
                     }
                     if (currentNet->start_x-dx < minX)
                            minX = currentNet->start_x-dx;
                     if (currentNet->start_y-dy < minY)
                            minY = currentNet->start_y-dy;
                     if (currentNet->start_x+dx > maxX)
                            maxX = currentNet->start_x+dx;
                     if (currentNet->start_y+dy > maxY)
                            maxY = currentNet->start_y+dy;
                            
                     if (currentNet->stop_x-dx < minX)
                            minX = currentNet->stop_x-dx;
                     if (currentNet->stop_y-dy < minY)
                            minY = currentNet->stop_y-dy;
                     if (currentNet->stop_x+dx > maxX)
                            maxX = currentNet->stop_x+dx;
                     if (currentNet->stop_y+dy > maxY)
                            maxY = currentNet->stop_y+dy;
                     
                     /* finally, delete node */
                     currentNet->interpolation = GERBV_INTERPOLATION_DELETED;
 
                     break;
              }
 
              default:
                     /* we don't current support arcs */
                     return FALSE;
              }
              
              /* create new structures */
              gerbv_image_create_window_pane_objects (image, minX, minY, maxX - minX, maxY - minY,
                     areaReduction, paneRows, paneColumns, paneSeparation);
       }
       return TRUE;
}
 
gboolean
gerbv_image_move_selected_objects (GArray *selectionArray, gdouble translationX,
              gdouble translationY)
{
       for (guint i=0; i<selectionArray->len; i++) {
              gerbv_selection_item_t sItem = g_array_index (selectionArray,gerbv_selection_item_t, i);
              gerbv_net_t *currentNet = sItem.net;
 
              if (currentNet->interpolation == GERBV_INTERPOLATION_PAREA_START) {
                     /* if it's a polygon, step through every vertex and translate the point */
                     for (currentNet = currentNet->next; currentNet; currentNet = currentNet->next){
                            if (currentNet->interpolation == GERBV_INTERPOLATION_PAREA_END)
                                   break;
                            currentNet->start_x += translationX;
                            currentNet->start_y += translationY;
                            currentNet->stop_x += translationX;
                            currentNet->stop_y += translationY;
                     }
              }
              else {
                     /* otherwise, just move the single element */
                     currentNet->start_x += translationX;
                     currentNet->start_y += translationY;
                     currentNet->stop_x += translationX;
                     currentNet->stop_y += translationY;
              }
       }
       return TRUE;
}
 
gerbv_net_t *
gerbv_image_return_next_renderable_object (gerbv_net_t *oldNet) {
       gerbv_net_t *currentNet=oldNet;
       
       if (currentNet->interpolation == GERBV_INTERPOLATION_PAREA_START) {
              /* if it's a polygon, step to the next non-polygon net */
              for (currentNet = currentNet->next; currentNet; currentNet = currentNet->next){
                     if (currentNet->interpolation == GERBV_INTERPOLATION_PAREA_END) {
                            return currentNet->next;
                     }
              }
              return NULL;
       }
       else {
              return currentNet->next;
       }
}
 
void
gerbv_image_create_dummy_apertures (gerbv_image_t *parsed_image) {
       gerbv_net_t *currentNet;
              
       /* run through and find last net pointer */
       for (currentNet = parsed_image->netlist; currentNet->next; currentNet = currentNet->next){
              if (parsed_image->aperture[currentNet->aperture] == NULL) {
                     parsed_image->aperture[currentNet->aperture] = g_new0 (gerbv_aperture_t, 1);
                     parsed_image->aperture[currentNet->aperture]->type = GERBV_APTYPE_CIRCLE;
                     parsed_image->aperture[currentNet->aperture]->parameter[0] = 0;
                     parsed_image->aperture[currentNet->aperture]->parameter[1] = 0;
              }
       }
}