#include <cairo/cairo.h>
#include <cairo/cairo-pdf.h>

#include <math.h>

// Draw some data to a PDF surface, then copy it to an image surface for
// rasterization.  The output should be non-AA'd (But it is...)
//
// Build with:
// gcc -g `pkg-config --cflags --libs cairo` simple_copy.c
int main(int argc, char *argv[])
{
        // Make a PDF surface
        const char fileName[] = "source.pdf";
        const int width = 1000;
        const int height = 1000;
        cairo_surface_t *pdfSurface = cairo_pdf_surface_create(
                        fileName, width, height);
        cairo_t *pdfContext = cairo_create(pdfSurface);

        // Uncomment this to achieve non-AA'd output.  But why?
        // Why do you have to set this on the PDF surface, *before*
        // drawing anything?  AA should only be being done during
        // the copy/rasterization (below).
/*         cairo_set_antialias(pdfContext, CAIRO_ANTIALIAS_NONE); */

        // Draw some circles
        {
                cairo_set_source_rgba(pdfContext, 0.0, 1.0, 0.0, 1);
                const double ang1 = 0;
                const double ang2 = 360 * M_PI/180.0;
                const double cenX = width / 2.0;
                const double cenY = height / 2.0;
                int i;
                for (i=50; i<=700; i+=50)
                {
                        cairo_arc(pdfContext, cenX, cenY, i, ang1, ang2);
                        cairo_stroke(pdfContext);
                }
        }

        // Make the image surface
        cairo_surface_t *imgSurface = cairo_image_surface_create(
                CAIRO_FORMAT_RGB24, width, height);
        cairo_t *imgContext = cairo_create(imgSurface);

        // This is where I'd expect to turn off AA, to get non-AA'd output.
        // However, this seems to have no effect.
        cairo_set_antialias(imgContext, CAIRO_ANTIALIAS_NONE);

        // Copy the PDF to the image
        cairo_set_source_surface(imgContext, pdfSurface, 0, 0);
        cairo_paint(imgContext);

        cairo_surface_write_to_png(imgSurface, "output.png");
        cairo_destroy(imgContext);
        cairo_destroy(pdfContext);
        cairo_surface_destroy(imgSurface);
        cairo_surface_destroy(pdfSurface);

        cairo_debug_reset_static_data(); // Valgrind

        return 0;
}