1 files changed, 106 insertions, 0 deletions
diff --git a/lib/jpegli/decode.h b/lib/jpegli/decode.h
new file mode 100644
index 0000000..9800ebf
--- /dev/null
+++ b/lib/jpegli/decode.h
@@ -0,0 +1,106 @@
+// Copyright (c) the JPEG XL Project Authors. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+//
+// This file contains the C API of the decoder part of the libjpegli library,
+// which is based on the C API of libjpeg, with the function names changed from
+// jpeg_* to jpegli_*, while decompressor object definitions are included
+// directly from jpeglib.h
+//
+// Applications can use the libjpegli library in one of the following ways:
+//
+//  (1) Include jpegli/encode.h and/or jpegli/decode.h, update the function
+//      names of the API and link against libjpegli.
+//
+//  (2) Leave the application code unchanged, but replace the libjpeg.so library
+//      with the one built by this project that is API- and ABI-compatible with
+//      libjpeg-turbo's version of libjpeg.so.
+
+#ifndef LIB_JPEGLI_DECODE_H_
+#define LIB_JPEGLI_DECODE_H_
+
+#include "lib/jpegli/common.h"
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+#define jpegli_create_decompress(cinfo)              \
+  jpegli_CreateDecompress((cinfo), JPEG_LIB_VERSION, \
+                          (size_t)sizeof(struct jpeg_decompress_struct))
+
+void jpegli_CreateDecompress(j_decompress_ptr cinfo, int version,
+                             size_t structsize);
+
+void jpegli_stdio_src(j_decompress_ptr cinfo, FILE *infile);
+
+void jpegli_mem_src(j_decompress_ptr cinfo, const unsigned char *inbuffer,
+                    unsigned long insize);
+
+int jpegli_read_header(j_decompress_ptr cinfo, boolean require_image);
+
+boolean jpegli_start_decompress(j_decompress_ptr cinfo);
+
+JDIMENSION jpegli_read_scanlines(j_decompress_ptr cinfo, JSAMPARRAY scanlines,
+                                 JDIMENSION max_lines);
+
+JDIMENSION jpegli_skip_scanlines(j_decompress_ptr cinfo, JDIMENSION num_lines);
+
+void jpegli_crop_scanline(j_decompress_ptr cinfo, JDIMENSION *xoffset,
+                          JDIMENSION *width);
+
+boolean jpegli_finish_decompress(j_decompress_ptr cinfo);
+
+JDIMENSION jpegli_read_raw_data(j_decompress_ptr cinfo, JSAMPIMAGE data,
+                                JDIMENSION max_lines);
+
+jvirt_barray_ptr *jpegli_read_coefficients(j_decompress_ptr cinfo);
+
+boolean jpegli_has_multiple_scans(j_decompress_ptr cinfo);
+
+boolean jpegli_start_output(j_decompress_ptr cinfo, int scan_number);
+
+boolean jpegli_finish_output(j_decompress_ptr cinfo);
+
+boolean jpegli_input_complete(j_decompress_ptr cinfo);
+
+int jpegli_consume_input(j_decompress_ptr cinfo);
+
+#if JPEG_LIB_VERSION >= 80
+void jpegli_core_output_dimensions(j_decompress_ptr cinfo);
+#endif
+void jpegli_calc_output_dimensions(j_decompress_ptr cinfo);
+
+void jpegli_save_markers(j_decompress_ptr cinfo, int marker_code,
+                         unsigned int length_limit);
+
+void jpegli_set_marker_processor(j_decompress_ptr cinfo, int marker_code,
+                                 jpeg_marker_parser_method routine);
+
+boolean jpegli_resync_to_restart(j_decompress_ptr cinfo, int desired);
+
+boolean jpegli_read_icc_profile(j_decompress_ptr cinfo, JOCTET **icc_data_ptr,
+                                unsigned int *icc_data_len);
+
+void jpegli_abort_decompress(j_decompress_ptr cinfo);
+
+void jpegli_destroy_decompress(j_decompress_ptr cinfo);
+
+void jpegli_new_colormap(j_decompress_ptr cinfo);
+
+//
+// New API functions that are not available in libjpeg
+//
+// NOTE: This part of the API is still experimental and will probably change in
+// the future.
+//
+
+void jpegli_set_output_format(j_decompress_ptr cinfo, JpegliDataType data_type,
+                              JpegliEndianness endianness);
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}  // extern "C"
+#endif
+
+#endif  // LIB_JPEGLI_DECODE_H_