示例#1
0
static fz_buffer *
pdf_load_image_stream(fz_context *ctx, pdf_document *doc, int num, int gen, int orig_num, int orig_gen, fz_compression_params *params, int *truncated)
{
	fz_stream *stm = NULL;
	pdf_obj *dict, *obj;
	int i, len, n;
	fz_buffer *buf;

	fz_var(buf);

	if (num > 0 && num < pdf_xref_len(ctx, doc))
	{
		pdf_xref_entry *entry = pdf_get_xref_entry(ctx, doc, num);
		/* Return ref to existing buffer, but only if uncompressed,
		 * or shortstoppable */
		if (can_reuse_buffer(ctx, entry, params))
			return fz_keep_buffer(ctx, entry->stm_buf);
	}

	dict = pdf_load_object(ctx, doc, num, gen);

	len = pdf_to_int(ctx, pdf_dict_get(ctx, dict, PDF_NAME_Length));
	obj = pdf_dict_get(ctx, dict, PDF_NAME_Filter);
	len = pdf_guess_filter_length(len, pdf_to_name(ctx, obj));
	n = pdf_array_len(ctx, obj);
	for (i = 0; i < n; i++)
		len = pdf_guess_filter_length(len, pdf_to_name(ctx, pdf_array_get(ctx, obj, i)));

	pdf_drop_obj(ctx, dict);

	stm = pdf_open_image_stream(ctx, doc, num, gen, orig_num, orig_gen, params);

	fz_try(ctx)
	{
		if (truncated)
			buf = fz_read_best(ctx, stm, len, truncated);
		else
			buf = fz_read_all(ctx, stm, len);
	}
	fz_always(ctx)
	{
		fz_drop_stream(ctx, stm);
	}
	fz_catch(ctx)
	{
		fz_rethrow_message(ctx, "cannot read raw stream (%d %d R)", num, gen);
	}

	return buf;
}
示例#2
0
fz_buffer *
fz_read_all(fz_stream *stm, int initial)
{
	return fz_read_best(stm, initial, NULL);
}
示例#3
0
文件: stream-read.c 项目: HCLAC/mupdf
fz_buffer *
fz_read_all(fz_context *ctx, fz_stream *stm, int initial)
{
	return fz_read_best(ctx, stm, initial, NULL);
}