jas_image_t *bmp_decode(jas_stream_t *in, char *optstr)
{
	jas_image_t *image;
	bmp_hdr_t hdr;
	bmp_info_t *info;
	uint_fast16_t cmptno;
	jas_image_cmptparm_t cmptparms[3];
	jas_image_cmptparm_t *cmptparm;
	uint_fast16_t numcmpts;
	long n;
	bmp_dec_importopts_t opts;
	size_t num_samples;

	image = 0;
	info = 0;

	if (bmp_dec_parseopts(optstr, &opts)) {
		goto error;
	}

	jas_eprintf(
	  "THE BMP FORMAT IS NOT FULLY SUPPORTED!\n"
	  "THAT IS, THE JASPER SOFTWARE CANNOT DECODE ALL TYPES OF BMP DATA.\n"
	  "IF YOU HAVE ANY PROBLEMS, PLEASE TRY CONVERTING YOUR IMAGE DATA\n"
	  "TO THE PNM FORMAT, AND USING THIS FORMAT INSTEAD.\n"
	  );

	/* Read the bitmap header. */
	if (bmp_gethdr(in, &hdr)) {
		jas_eprintf("cannot get header\n");
		goto error;
	}
	JAS_DBGLOG(1, (
	  "BMP header: magic 0x%x; siz %d; res1 %d; res2 %d; off %d\n",
	  hdr.magic, hdr.siz, hdr.reserved1, hdr.reserved2, hdr.off
	  ));

	/* Read the bitmap information. */
	if (!(info = bmp_getinfo(in))) {
		jas_eprintf("cannot get info\n");
		goto error;
	}
	JAS_DBGLOG(1,
	  ("BMP information: len %ld; width %ld; height %ld; numplanes %d; "
	  "depth %d; enctype %ld; siz %ld; hres %ld; vres %ld; numcolors %ld; "
	  "mincolors %ld\n", JAS_CAST(long, info->len),
	  JAS_CAST(long, info->width), JAS_CAST(long, info->height),
	  JAS_CAST(long, info->numplanes), JAS_CAST(long, info->depth),
	  JAS_CAST(long, info->enctype), JAS_CAST(long, info->siz),
	  JAS_CAST(long, info->hres), JAS_CAST(long, info->vres),
	  JAS_CAST(long, info->numcolors), JAS_CAST(long, info->mincolors)));

	if (info->width < 0 || info->height < 0 || info->numplanes < 0 ||
	  info->depth < 0 || info->siz < 0 || info->hres < 0 || info->vres < 0) {
		jas_eprintf("corrupt bit stream\n");
		goto error;
	}

	if (!jas_safe_size_mul3(info->width, info->height, info->numplanes,
	  &num_samples)) {
		jas_eprintf("image size too large\n");
		goto error;
	}

	if (opts.max_samples > 0 && num_samples > opts.max_samples) {
		jas_eprintf("maximum number of pixels exceeded (%zu)\n",
		  opts.max_samples);
		goto error;
	}

	/* Ensure that we support this type of BMP file. */
	if (!bmp_issupported(&hdr, info)) {
		jas_eprintf("error: unsupported BMP encoding\n");
		goto error;
	}

	/* Skip over any useless data between the end of the palette
	  and start of the bitmap data. */
	if ((n = hdr.off - (BMP_HDRLEN + BMP_INFOLEN + BMP_PALLEN(info))) < 0) {
		jas_eprintf("error: possibly bad bitmap offset?\n");
		goto error;
	}
	if (n > 0) {
		jas_eprintf("skipping unknown data in BMP file\n");
		if (bmp_gobble(in, n)) {
			goto error;
		}
	}

	/* Get the number of components. */
	numcmpts = bmp_numcmpts(info);

	for (cmptno = 0, cmptparm = cmptparms; cmptno < numcmpts; ++cmptno,
	  ++cmptparm) {
		cmptparm->tlx = 0;
		cmptparm->tly = 0;
		cmptparm->hstep = 1;
		cmptparm->vstep = 1;
		cmptparm->width = info->width;
		cmptparm->height = info->height;
		cmptparm->prec = 8;
		cmptparm->sgnd = false;
	}

	/* Create image object. */
	if (!(image = jas_image_create(numcmpts, cmptparms,
	  JAS_CLRSPC_UNKNOWN))) {
		goto error;
	}

	if (numcmpts == 3) {
		jas_image_setclrspc(image, JAS_CLRSPC_SRGB);
		jas_image_setcmpttype(image, 0,
		  JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_RGB_R));
		jas_image_setcmpttype(image, 1,
		  JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_RGB_G));
		jas_image_setcmpttype(image, 2,
		  JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_RGB_B));
	} else {
		jas_image_setclrspc(image, JAS_CLRSPC_SGRAY);
		jas_image_setcmpttype(image, 0,
		  JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_GRAY_Y));
	}

	/* Read the bitmap data. */
	if (bmp_getdata(in, info, image)) {
		goto error;
	}

	bmp_info_destroy(info);

	return image;

error:
	if (info) {
		bmp_info_destroy(info);
	}
	if (image) {
		jas_image_destroy(image);
	}
	return 0;
}