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+/****************************************************************************\
+ Part of the XeTeX typesetting system
+ copyright (c) 1994-2006 by SIL International
+ written by Jonathan Kew
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+\****************************************************************************/
+
+/* this file is derived from the dvipdfmx project;
+ the original header follows... */
+
+/* $Header: /home/cvsroot/dvipdfmx/src/jpegimage.h,v 1.2 2004/03/11 11:50:21 hirata Exp $
+
+ This is dvipdfmx, an eXtended version of dvipdfm by Mark A. Wicks.
+
+ Copyright (C) 2002 by Jin-Hwan Cho and Shunsaku Hirata,
+ the dvipdfmx project team <dvipdfmx@project.ktug.or.kr>
+
+ Copyright (C) 1998, 1999 by Mark A. Wicks <mwicks@kettering.edu>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+*/
+
+#ifndef _JPEGIMAGE_H_
+#define _JPEGIMAGE_H_
+
+#include "mfileio.h"
+
+/* JPEG Markers */
+typedef enum {
+ JM_SOF0 = 0xc0,
+ JM_SOF1 = 0xc1,
+ JM_SOF2 = 0xc2,
+ JM_SOF3 = 0xc3,
+ JM_SOF5 = 0xc5,
+ JM_DHT = 0xc4,
+ JM_SOF6 = 0xc6,
+ JM_SOF7 = 0xc7,
+ JM_SOF9 = 0xc9,
+ JM_SOF10 = 0xca,
+ JM_SOF11 = 0xcb,
+ JM_DAC = 0xcc,
+ JM_SOF13 = 0xcd,
+ JM_SOF14 = 0xce,
+ JM_SOF15 = 0xcf,
+
+ JM_RST0 = 0xd0,
+ JM_RST1 = 0xd1,
+ JM_RST2 = 0xd2,
+ JM_RST3 = 0xd3,
+ JM_RST4 = 0xd4,
+ JM_RST5 = 0xd5,
+ JM_RST6 = 0xd6,
+ JM_RST7 = 0xd7,
+
+ JM_SOI = 0xd8,
+ JM_EOI = 0xd9,
+ JM_SOS = 0xda,
+ JM_DQT = 0xdb,
+ JM_DNL = 0xdc,
+ JM_DRI = 0xdd,
+ JM_DHP = 0xde,
+ JM_EXP = 0xdf,
+
+ JM_APP0 = 0xe0,
+ JM_APP2 = 0xe2,
+ JM_APP14 = 0xee,
+ JM_APP15 = 0xef,
+
+ JM_COM = 0xfe
+} JPEG_marker;
+
+typedef enum {
+ JS_APPn_JFIF,
+ JS_APPn_ADOBE,
+ JS_APPn_ICC
+} JPEG_APPn_sig;
+
+struct JPEG_APPn_JFIF /* APP0 */
+{
+ unsigned short version;
+ unsigned char units; /* 0: only aspect ratio
+ * 1: dots per inch
+ * 2: dots per cm
+ */
+ unsigned short Xdensity;
+ unsigned short Ydensity;
+ unsigned char Xthumbnail;
+ unsigned char Ythumbnail;
+ unsigned char *thumbnail; /* Thumbnail data. */
+};
+
+struct JPEG_APPn_ICC /* APP2 */
+{
+ unsigned char seq_id;
+ unsigned char num_chunks;
+ unsigned char *chunk;
+
+ /* Length of ICC profile data in this chunk. */
+ unsigned short length;
+};
+
+struct JPEG_APPn_Adobe /* APP14 */
+{
+ unsigned short version;
+ unsigned short flag0;
+ unsigned short flag1;
+ unsigned char transform; /* color transform code */
+};
+
+struct JPEG_ext
+{
+ JPEG_marker marker;
+ JPEG_APPn_sig app_sig;
+ void *app_data;
+};
+
+#define MAX_COUNT 1024
+struct JPEG_info
+{
+ unsigned short height;
+ unsigned short width;
+
+ unsigned char bits_per_component;
+ unsigned char num_components;
+
+ double xdpi;
+ double ydpi;
+
+ /* Application specific extensions */
+ int flags;
+ int num_appn, max_appn;
+ struct JPEG_ext *appn;
+
+ /* Skip chunks not necessary. */
+ char skipbits[MAX_COUNT / 8 + 1];
+};
+
+extern int check_for_jpeg(FILE *fp);
+extern int JPEG_scan_file(struct JPEG_info *info, FILE *fp);
+
+#endif /* _JPEGIMAGE_H_ */