/*
 * pdf_test_invert.c
 *
 *   Generates pdf from 1 bpp pix, with and without a colormap.
 *   Inspection of the two pdf files generated shows that the first
 *   has a colormap and the second one doesn't.
 */

#include "allheaders.h"

l_int32 main(int    argc,
             char **argv)
{
l_uint8      *data8;
size_t        nbytes;
PIX          *pix1, *pix2;
PIXCMAP      *cmap, *cmap2;
L_COMP_DATA  *cid1, *cid2;

    setLeptDebugOK(1);

    // This troublesome 1 bpp image may have had a colormap.
    // Reading using pixRead() will remove it, if it existed.
    pix1 = pixRead("bitinvert1.png");
    pixDisplay(pix1, 100, 0);

    // Put a colormap in by hand
    cmap = pixcmapCreate(1);
    pixcmapAddColor(cmap, 255, 255, 255);  // white = 0
    pixcmapAddColor(cmap, 0, 0, 0);  // black = 1
    pixSetColormap(pix1, cmap);
    pixDisplay(pix1, 100, 300);

    // Generate a pdf from this pix. The pdf has the colormap.
    pixGenerateCIData(pix1, L_FLATE_ENCODE, 0, 0, &cid1);
    fprintf(stderr, "Should have 2 colors: num colors1 = %d\n", cid1->ncolors);
    cidConvertToPdfData(cid1, "with colormap",&data8, &nbytes);
    l_binaryWrite("/tmp/bitinvert1.pdf", "w", data8, nbytes);

    // Write pix1 out as PNG; the colormap is in the PNG file
    pixWrite("/tmp/bitinvert2.png", pix1, IFF_PNG);  // has colormap
    pix2 = pixRead("/tmp/bitinvert2.png");  // this removes the colormap
    pixDisplay(pix2, 100, 600);
    lept_free(data8);

    // Generate a pdf from bitinvert2.png.
    //   l_generateCIDataForPdf() calls l_generateFlateDataPdf()
    //   which calls pixRead(), removing the cmap
    l_generateCIDataForPdf("/tmp/bitinvert2.png", NULL, 75, &cid1);
    fprintf(stderr, "Should have 0 colors: num colors1 = %d\n", cid1->ncolors);
    cidConvertToPdfData(cid1, "no colormap",&data8, &nbytes);
    l_binaryWrite("/tmp/bitinvert2.pdf", "w", data8, nbytes);

    lept_free(data8);
    pixDestroy(&pix1);
    pixDestroy(&pix2);
    return 0;
}