[poppler] Pink background with cairo render

[Mikhail Kostousov]

Hello!

I wrote a small program to split each page of pdf one in two pages. I am
using poppler_page_render to cairo surface.
The program works well, but I get pink background on page. I cannot
understand why it become pink. I am using poppler 0.8.2, cairo 1.6.4 on
macosx. The code of program
###################################
#include <stdio.h>
#include <cairo.h>
#include <cairo-pdf.h>
#include <glib/poppler.h>


int main(int argc,char **argv)
{

        g_type_init();
        GError * error=NULL;
        gchar * uri;


        uri=g_filename_to_uri(argv[1],NULL,&error);
        if (error)
        {
                g_print("Error: %s\n",error->message);
                g_error_free(error);
                return 1;
        }

        PopplerDocument
*popplerDocument=poppler_document_new_from_file(uri,"",NULL);

        if (error)
        {
                g_print("Error: %s\n",error->message);
                g_error_free(error);
                g_free(uri);
                return 1;
        }

        int n=poppler_document_get_n_pages(popplerDocument);

        double width,height;
        PopplerPage *page=poppler_document_get_page(popplerDocument,2);
        poppler_page_get_size(page,&width,&height);

        cairo_surface_t *surface=cairo_pdf_surface_create
("test_2.pdf",width/2,height);
        cairo_t *ct=cairo_create(surface);

        for (int i=0;i<n;i++)
        {

                printf("%d from %d\n",i,n);
                page=poppler_document_get_page(popplerDocument,i);
                cairo_save(ct);
                cairo_rectangle(ct,0,0,width/2,height);
                cairo_fill(ct);
                cairo_clip(ct);
                poppler_page_render_for_printing(page,ct);
                cairo_show_page(ct);
                cairo_restore(ct);

                cairo_save(ct);
                cairo_translate(ct,-width/2,0);
                cairo_rectangle(ct,width/2,0,width/2,height);
                cairo_clip(ct);
                poppler_page_render(page,ct);
                cairo_show_page(ct);
                cairo_restore(ct);

        }
        cairo_destroy(ct);
        cairo_surface_finish(surface);
        cairo_surface_destroy(surface);

                g_free(uri);

return 0;
}


With best regards,
Mikhail
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