example3.c

/*------------------------------------------------------------------------------
       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 gtk+-2.0 glib-2.0 libgerbv` `pkg-config \
--libs gtk+-2.0 glib-2.0 libgerbv` example3.c -o example3

       Run with the following command:
       
       ./example3

------------------------------------------------------------------------------*/

#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;
}