Decode JBIG and JPEG during HN conversion.

1 files changed, 41 insertions, 0 deletions

diff --git a/src/jbig.c b/src/jbig.c
new file mode 100644
index 0000000..1e9afb3
--- /dev/null
+++ b/src/jbig.c
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2020-2021, yzrh <yzrh@noema.org>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <stdio.h> /* FIXME: test */
+#include <stdlib.h>
+#include <string.h>
+
+#include <jbig.h>
+
+int
+strdec_jbig(char **bitmap, int *bitmap_size,
+	const char * restrict data, int data_size)
+{
+	struct jbg_dec_state sd;
+
+	jbg_dec_init(&sd);
+
+	unsigned char *data_ptr[1] = {(unsigned char *) data};
+
+	/* FIXME: test */
+	int ret;
+	if ((ret = jbg_dec_in(&sd, (unsigned char *) data_ptr,
+		data_size, NULL)) != JBG_EOK) {
+		printf("%s", jbg_strerror(ret));
+		jbg_dec_free(&sd);
+		return 1;
+	}
+
+	*bitmap_size = jbg_dec_getsize(&sd);
+	*bitmap = malloc(*bitmap_size);
+
+	if (*bitmap != NULL)
+		memcpy(*bitmap, jbg_dec_getimage(&sd, 0), *bitmap_size);
+
+	jbg_dec_free(&sd);
+
+	return 0;
+}