Decode JBIG and JPEG during HN conversion.

1 files changed, 78 insertions, 0 deletions

diff --git a/src/cnki_jbig.h b/src/cnki_jbig.h
new file mode 100644
index 0000000..96e4ea8
--- /dev/null
+++ b/src/cnki_jbig.h
@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2020-2021, yzrh <yzrh@noema.org>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <stdint.h>
+
+/*
+ * order (MSB first):
+ * 0
+ * 0
+ * 0
+ * 0
+ * HITOLO
+ * SEQ
+ * ILEAVE (default)
+ * SMID (default)
+ *
+ * options (MSB first):
+ * 0
+ * LRLTWO
+ * VLENGTH
+ * TPDON (default)
+ * TPBON (default)
+ * DPON (default)
+ * DPPRIV
+ * DPLAST
+ */
+typedef struct _bih_t {
+	char d_l; /* Initial resolution layer */
+	char d; /* Final resolution layer */
+	char p; /* Number of bit-planes, for bi-level image, always 1 */
+	char fill; /* Always 0 */
+	/* MSB first */
+	int32_t x_d; /* Horizontal dimension at highestresolution */
+	int32_t y_d; /* Vertical dimension at highest resolution */
+	int32_t l_0; /* Number of lines per stripe at lowest resolution */
+	char m_x; /* Maximum horizontal offsets (default: 8) */
+	char m_y; /* Maximum vertical offsets (default: 0) */
+	char order;
+	char options;
+	char *dptable; /* 0 or 1728 */
+} bih_t;
+
+typedef enum _dib_compression_code {
+	BI_RGB,
+	BI_RLE8,
+	BI_RLE4,
+	BI_BITFIELDS,
+	BI_JPEG,
+	BI_PNG,
+	BI_ALPHABITFIELDS,
+	BI_CMYK = 11,
+	BI_CMYKRLE8 = 12,
+	BI_CMYKRLE4 = 13
+} dib_compression_code;
+
+typedef struct _dib_t {
+	uint32_t dib_size; /* Always 40 */
+	int32_t width;
+	int32_t height;
+	uint16_t plane; /* Always 1 */
+	uint16_t depth;
+	uint32_t compression; /* dib_compression_code */
+	uint32_t size;
+	uint32_t resolution_h;
+	uint32_t resolution_v;
+	uint32_t colour;
+	uint32_t colour_used;
+} dib_t;
+
+typedef struct _colour_table {
+	uint16_t blue;
+	uint16_t green;
+	uint16_t red;
+	uint16_t fill; /* Always 0 */
+} colour_table;