/*------------------------------------------------------------------------------
	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);

	/* destroy all created structures */
	gerbv_destroy_image (workingImage);
	return 0;
}