C++ (Cpp) build_filter_chain Examples

Example #1

File: pdf_stream.c Project: AhmadHegazy/PDFViewer-Android

/*
 * Construct a filter to decode a stream, constraining
 * to stream length and decrypting.
 */
static fz_stream *
pdf_open_filter(fz_stream *chain, pdf_xref *xref, fz_obj *stmobj, int num, int gen)
{
	fz_obj *filters;
	fz_obj *params;

	filters = fz_dict_getsa(stmobj, "Filter", "F");
	params = fz_dict_getsa(stmobj, "DecodeParms", "DP");

	chain = pdf_open_raw_filter(chain, xref, stmobj, num, gen);

	if (fz_is_name(filters))
		return build_filter(chain, xref, filters, params, num, gen);
	if (fz_array_len(filters) > 0)
		return build_filter_chain(chain, xref, filters, params, num, gen);

	return chain;
}

Example #2

File: pdf_stream.c Project: JMQCode/iBooks

/*
 * Construct a filter to decode a stream, constraining
 * to stream length and decrypting.
 */
static fz_stream *
pdf_open_filter(fz_stream *chain, pdf_document *xref, pdf_obj *stmobj, int num, int gen, int offset, pdf_image_params *imparams)
{
	pdf_obj *filters;
	pdf_obj *params;

	filters = pdf_dict_getsa(stmobj, "Filter", "F");
	params = pdf_dict_getsa(stmobj, "DecodeParms", "DP");

	chain = pdf_open_raw_filter(chain, xref, stmobj, num, gen, offset);

	if (pdf_is_name(filters))
		chain = build_filter(chain, xref, filters, params, num, gen, imparams);
	else if (pdf_array_len(filters) > 0)
		chain = build_filter_chain(chain, xref, filters, params, num, gen, imparams);

	return chain;
}

Example #3

File: pdf_stream.c Project: Ernest0x/mupdf

/*
 * Construct a filter to decode a stream, without
 * constraining to stream length, and without decryption.
 */
fz_stream *
pdf_open_inline_stream(pdf_document *xref, pdf_obj *stmobj, int length, fz_stream *chain, pdf_image_params *imparams)
{
    pdf_obj *filters;
    pdf_obj *params;

    filters = pdf_dict_getsa(stmobj, "Filter", "F");
    params = pdf_dict_getsa(stmobj, "DecodeParms", "DP");

    /* don't close chain when we close this filter */
    fz_keep_stream(chain);

    if (pdf_is_name(filters))
        return build_filter(chain, xref, filters, params, 0, 0, imparams);
    if (pdf_array_len(filters) > 0)
        return build_filter_chain(chain, xref, filters, params, 0, 0, imparams);

    return fz_open_null(chain, length);
}

Example #4

File: pdf_stream.c Project: AhmadHegazy/PDFViewer-Android

/*
 * Construct a filter to decode a stream, without
 * constraining to stream length, and without decryption.
 */
fz_stream *
pdf_open_inline_stream(fz_stream *chain, pdf_xref *xref, fz_obj *stmobj, int length)
{
	fz_obj *filters;
	fz_obj *params;

	filters = fz_dict_getsa(stmobj, "Filter", "F");
	params = fz_dict_getsa(stmobj, "DecodeParms", "DP");

	/* don't close chain when we close this filter */
	fz_keep_stream(chain);

	if (fz_is_name(filters))
		return build_filter(chain, xref, filters, params, 0, 0);
	if (fz_array_len(filters) > 0)
		return build_filter_chain(chain, xref, filters, params, 0, 0);

	return fz_open_null(chain, length);
}

Example #5

File: pdf-stream.c Project: PuzzleFlow/mupdf

/*
 * Construct a filter to decode a stream, without
 * constraining to stream length, and without decryption.
 */
fz_stream *
pdf_open_inline_stream(fz_context *ctx, pdf_document *doc, pdf_obj *stmobj, int length, fz_stream *chain, fz_compression_params *imparams)
{
	pdf_obj *filters;
	pdf_obj *params;

	filters = pdf_dict_geta(ctx, stmobj, PDF_NAME_Filter, PDF_NAME_F);
	params = pdf_dict_geta(ctx, stmobj, PDF_NAME_DecodeParms, PDF_NAME_DP);

	/* don't close chain when we close this filter */
	fz_keep_stream(ctx, chain);

	if (pdf_is_name(ctx, filters))
		return build_filter(ctx, chain, doc, filters, params, 0, 0, imparams);
	if (pdf_array_len(ctx, filters) > 0)
		return build_filter_chain(ctx, chain, doc, filters, params, 0, 0, imparams);

	if (imparams)
		imparams->type = FZ_IMAGE_RAW;
	return fz_open_null(ctx, chain, length, fz_tell(ctx, chain));
}

Example #6

File: pdf-stream.c Project: iezbli/zbli

/*
 * Construct a filter to decode a stream, constraining
 * to stream length and decrypting.
 */
static fz_stream *
pdf_open_filter(fz_context *ctx, pdf_document *doc, fz_stream *chain, pdf_obj *stmobj, int num, fz_off_t offset, fz_compression_params *imparams)
{
	pdf_obj *filters;
	pdf_obj *params;
	int orig_num, orig_gen;

	filters = pdf_dict_geta(ctx, stmobj, PDF_NAME_Filter, PDF_NAME_F);
	params = pdf_dict_geta(ctx, stmobj, PDF_NAME_DecodeParms, PDF_NAME_DP);

	chain = pdf_open_raw_filter(ctx, chain, doc, stmobj, num, &orig_num, &orig_gen, offset);

	fz_var(chain);

	fz_try(ctx)
	{
		if (pdf_is_name(ctx, filters))
		{
			fz_stream *chain2 = chain;
			chain = NULL;
			chain = build_filter(ctx, chain2, doc, filters, params, orig_num, orig_gen, imparams);
		}
		else if (pdf_array_len(ctx, filters) > 0)
		{
			fz_stream *chain2 = chain;
			chain = NULL;
			chain = build_filter_chain(ctx, chain2, doc, filters, params, orig_num, orig_gen, imparams);
		}
	}
	fz_catch(ctx)
	{
		fz_drop_stream(ctx, chain);
		fz_rethrow(ctx);
	}

	return chain;
}