doc/example-code/example4.c

   1 /*------------------------------------------------------------------------------
   2         Filename: example4.c
   3
   4         Description: Loads example4-input.gbx, searches through the file and
   5                 removes any entities with a width less than 60mils, and re-exports
   6                 the modified image to a new RS274X file.
   7
   8         Instructions: Make sure you are in the example-code directory, and compile
   9                 this program with the following command:
  10
  11         gcc -Wall -g `pkg-config --cflags libgerbv` `pkg-config --libs libgerbv` example4.c -o example4
  12
  13         Run with the following command:
  14
  15         ./example4
  16
  17         Common compiling problems:
  18                 1. If you are compiling gerbv from source, make sure you run
  19                         "make install" before trying to compile this example. This
  20                         ensures libgerbv is correctly installed and can be found.
  21                 2. If you installed gerbv to "/usr/local" (the default), many
  22                         distributions don't correctly point pkgconfig to this target.
  23                         To fix this, add the following to your ~/.bashrc file:
  24
  25                         export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig/:/usr/lib/pkgconfig/
  26 ------------------------------------------------------------------------------*/
  27
  28 #include "gerbv.h"
  29
  30 int
  31 main(int argc, char *argv[]) {
  32         gerbv_image_t *workingImage;
  33         gerbv_net_t *currentNet;
  34
  35         /* parse and create the image */
  36         workingImage = gerbv_create_rs274x_image_from_filename ("example4-input.gbx");
  37
  38         /* make sure we parsed the file */
  39         if (workingImage == NULL)
  40                 g_error ("There was an error parsing the file.");
  41
  42         /* run through all the nets in the layer */
  43         for (currentNet = workingImage->netlist; currentNet; currentNet = currentNet->next){
  44                 /* check if the net aperture is a circle and has diameter < 0.060 inches */
  45                 if ((currentNet->aperture_state != GERBV_APERTURE_STATE_OFF) &&
  46                                 (workingImage->aperture[currentNet->aperture] != NULL) &&
  47                                 (workingImage->aperture[currentNet->aperture]->type == GERBV_APTYPE_CIRCLE) &&
  48                                 (workingImage->aperture[currentNet->aperture]->parameter[0] < 0.060)){
  49                         /* we found a path which meets the criteria, so delete the net for
  50                            demostration purposes */
  51                         gerbv_image_delete_net (currentNet);
  52                 }
  53         }
  54
  55         /* export the modified image to a new rs274x file */
  56         gerbv_export_rs274x_file_from_image ("example4-output.gbx", workingImage, NULL);
  57
  58         /* destroy all created structures */
  59         gerbv_destroy_image (workingImage);
  60         return 0;
  61 }