/*------------------------------------------------------------------------------
	Filename: example3.c
	
	Description: Loads example3-input.gbx, duplicates it and offsets it to the
		right by the width of the layer, changed the rendered color of the
		second image, then exports a PNG rendering of the overlaid images.

	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` example3.c -o example3

	Run with the following command:
	
	./example3
	
	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[]) {
	/* create a top level libgerbv structure */
	gerbv_project_t *mainProject = gerbv_create_project();

	/* parse a Gerber file and store it in the gerbv_project_t struct, and
	   then immediately parse a second copy */
	gerbv_open_layer_from_filename (mainProject, "example3-input.gbx");
	gerbv_open_layer_from_filename (mainProject, "example3-input.gbx");

	/* make sure we parsed the files */
	if ((mainProject->file[0] == NULL) || (mainProject->file[1] == NULL))
		g_error ("There was an error parsing the files.");
	
	/* translate the second image (file[1]) up and right by 0.02 inches */
	mainProject->file[1]->transform.translateY = 0.02;
	mainProject->file[1]->transform.translateX = 0.02;
	
	/* change the color of the first image (file[0]) to green */
	GdkColor greenishColor = {0, 10000, 65000, 10000};
	mainProject->file[0]->color = greenishColor;
	
	/* export a rendered PNG image of the project, using the autoscale version
	   to automatically center the image */
	gerbv_export_png_file_from_project_autoscaled (mainProject, 640, 480,
					"example3-output.png");
	
	/* destroy the project, which will in turn destroy all child images */
	gerbv_destroy_project (mainProject);
	return 0;
}