example4.c

/*------------------------------------------------------------------------------
       Filename: example4.c
       
       Description: Loads example4-input.gbx, searches through the file and
              removes any entities with a width less than 60mils, and re-exports
              the modified image to a new RS274X file.
 
       Instructions: Make sure you are in the example-code directory, and compile
              this program with the following command:
 
       gcc -Wall -g `pkg-config --cflags libgerbv` `pkg-config --libs libgerbv` example4.c -o example4
 
       Run with the following command:
       
       ./example4
       
       Common compiling problems:
              1. If you are compiling gerbv from source, make sure you run
                     "make install" before trying to compile this example. This
                     ensures libgerbv is correctly installed and can be found.
              2. If you installed gerbv to "/usr/local" (the default), many
                     distributions don't correctly point pkgconfig to this target.
                     To fix this, add the following to your ~/.bashrc file:
                     
                     export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig/:/usr/lib/pkgconfig/ 
------------------------------------------------------------------------------*/
 
#include "gerbv.h"
 
int
main(int argc, char *argv[]) {
       gerbv_image_t *workingImage;
       gerbv_net_t *currentNet;
 
       /* parse and create the image */
       workingImage = gerbv_create_rs274x_image_from_filename ("example4-input.gbx");
       
       /* make sure we parsed the file */
       if (workingImage == NULL)
              g_error ("There was an error parsing the file.");
              
       /* run through all the nets in the layer */
       for (currentNet = workingImage->netlist; currentNet; currentNet = currentNet->next){       
              /* check if the net aperture is a circle and has diameter < 0.060 inches */
              if ((currentNet->aperture_state != GERBV_APERTURE_STATE_OFF) &&
                            (workingImage->aperture[currentNet->aperture] != NULL) &&
                            (workingImage->aperture[currentNet->aperture]->type == GERBV_APTYPE_CIRCLE) &&
                            (workingImage->aperture[currentNet->aperture]->parameter[0] < 0.060)){
                     /* we found a path which meets the criteria, so delete the net for
                        demostration purposes */
                     gerbv_image_delete_net (currentNet);
              }
       }
 
       /* export the modified image to a new rs274x file */
       gerbv_export_rs274x_file_from_image ("example4-output.gbx", workingImage, NULL);
 
       /* destroy all created structures */
       gerbv_destroy_image (workingImage);
       return 0;
}