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diff --git a/Build/source/texk/dvipdfm-x/jpegimage.c b/Build/source/texk/dvipdfm-x/jpegimage.c
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--- a/Build/source/texk/dvipdfm-x/jpegimage.c
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-/* This is dvipdfmx, an eXtended version of dvipdfm by Mark A. Wicks.
-
- Copyright (C) 2002-2020 by Jin-Hwan Cho and Shunsaku Hirata,
- the dvipdfmx project team.
-
- 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.
-*/
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-/*
- * JPEG SUPPORT
- *
- * Accroding to Libjpeg document:
- *
- * CAUTION: it appears that Adobe Photoshop writes inverted data in CMYK
- * JPEG files: 0 represents 100% ink coverage, rather than 0% ink as you'd
- * expect....
- *
- * To wrok with this problem, we must detect whether CMYK JPEG file is
- * created by Photoshop. But there are no reliable way to determine this.
- *
- * According to Adobe Technical Note #5516,
- * "Supporting the DCT Filters in PostScript Level 2", Section 18, p.27.
- *
- * DCTDecode ignores and skips any APPE marker segment does not begin with
- * the `Adobe' 5-character string.
- *
- * PDF Reference Manual 4th ed., p.61-62.
- *
- * The JPEG filter implementation in Adobe Acrobat products does not
- * support features of the JPEG standard that are irrelevant to images.
- * In addition, certain choices have been made regarding reserved marker
- * codes and other optional features of the standard. For details, see
- * Adobe Technical Note #5116, Supporting the DCT Filters in PostScript
- * Level 2.
- */
-
-#include "system.h"
-#include "error.h"
-#include "mem.h"
-
-#include "mfileio.h"
-#include "numbers.h"
-
-#include "dpxconf.h"
-
-#include "pdfobj.h"
-
-#include "jpegimage.h"
-#include "pdfcolor.h"
-
-#include "pdfximage.h"
-
-#define JPEG_DEBUG_STR "JPEG"
-#define JPEG_DEBUG 3
-
-#ifdef HAVE_LIBJPEG
-#include <jpeglib.h>
-#endif /* HAVE_LIBJPEG */
-
-/* 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_APP1 = 0xe1,
- 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,
- JS_APPn_XMP
-} JPEG_APPn_sig;
-
-struct JPEG_APPn_JFIF /* APP0 */
-{
- uint16_t version;
- uint8_t units; /* 0: only aspect ratio
- * 1: dots per inch
- * 2: dots per cm
- */
- uint16_t Xdensity;
- uint16_t Ydensity;
- uint8_t Xthumbnail;
- uint8_t Ythumbnail;
- unsigned char *thumbnail; /* Thumbnail data. */
-};
-
-struct JPEG_APPn_ICC /* APP2 */
-{
- uint8_t seq_id;
- uint8_t num_chunks;
- unsigned char *chunk;
-
- /* Length of ICC profile data in this chunk. */
- size_t length;
-};
-
-struct JPEG_APPn_Adobe /* APP14 */
-{
- uint16_t version;
- uint16_t flag0;
- uint16_t flag1;
- uint8_t transform; /* color transform code */
-};
-
-struct JPEG_APPn_XMP /* APP1 */
-{
- unsigned char *packet; /* XMP packet */
-
- /* Length of XMP packet data */
- size_t length;
-};
-
-struct JPEG_ext
-{
- JPEG_marker marker;
- JPEG_APPn_sig app_sig;
- void *app_data;
-};
-
-#define MAX_COUNT 1024
-struct JPEG_info
-{
- uint16_t height;
- uint16_t width;
-
- uint8_t bits_per_component;
- uint8_t 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];
-};
-
-#define HAVE_APPn_JFIF (1 << 0)
-#define HAVE_APPn_ADOBE (1 << 1)
-#define HAVE_APPn_ICC (1 << 2)
-#define HAVE_APPn_Exif (1 << 3)
-#define HAVE_APPn_XMP (1 << 4)
-
-static int JPEG_scan_file (struct JPEG_info *j_info, FILE *fp);
-static int JPEG_copy_stream (struct JPEG_info *j_info, pdf_obj *stream, FILE *fp);
-
-static void JPEG_info_init (struct JPEG_info *j_info);
-static void JPEG_info_clear (struct JPEG_info *j_info);
-static pdf_obj *JPEG_get_XMP (struct JPEG_info *j_info);
-static pdf_obj *JPEG_get_iccp (struct JPEG_info *j_info);
-static void jpeg_get_density (struct JPEG_info *j_info, double *xdensity, double *ydensity);
-
-int
-check_for_jpeg (FILE *fp)
-{
- unsigned char jpeg_sig[2];
-
- rewind(fp);
- if (fread(jpeg_sig, sizeof(unsigned char), 2, fp) != 2)
- return 0;
- else if (jpeg_sig[0] != 0xff || jpeg_sig[1] != JM_SOI)
- return 0;
-
- return 1;
-}
-
-int
-jpeg_include_image (pdf_ximage *ximage, FILE *fp)
-{
- pdf_obj *stream;
- pdf_obj *stream_dict;
- pdf_obj *colorspace;
- int colortype;
- ximage_info info;
- struct JPEG_info j_info;
-
- if (!check_for_jpeg(fp)) {
- WARN("%s: Not a JPEG file?", JPEG_DEBUG_STR);
- rewind(fp);
- return -1;
- }
- /* File position is 2 here... */
-
- pdf_ximage_init_image_info(&info);
-
- JPEG_info_init(&j_info);
-
- if (JPEG_scan_file(&j_info, fp) < 0) {
- WARN("%s: Not a JPEG file?", JPEG_DEBUG_STR);
- JPEG_info_clear(&j_info);
- return -1;
- }
-
- switch (j_info.num_components) {
- case 1:
- colortype = PDF_COLORSPACE_TYPE_GRAY;
- break;
- case 3:
- colortype = PDF_COLORSPACE_TYPE_RGB;
- break;
- case 4:
- colortype = PDF_COLORSPACE_TYPE_CMYK;
- break;
- default:
- WARN("%s: Unknown color space (num components: %d)", JPEG_DEBUG_STR, info.num_components);
- JPEG_info_clear(&j_info);
- return -1;
- }
-
- /* JPEG image use DCTDecode. */
- stream = pdf_new_stream (0);
- stream_dict = pdf_stream_dict(stream);
- pdf_add_dict(stream_dict, pdf_new_name("Filter"), pdf_new_name("DCTDecode"));
-
- /* XMP Metadata */
- if (pdf_check_version(1, 4) >= 0) {
- if (j_info.flags & HAVE_APPn_XMP) {
- pdf_obj *XMP_stream;
-
- XMP_stream = JPEG_get_XMP(&j_info);
- pdf_add_dict(stream_dict,
- pdf_new_name("Metadata"), pdf_ref_obj(XMP_stream));
- pdf_release_obj(XMP_stream);
- }
- }
-
- /* Check embedded ICC Profile */
- colorspace = NULL;
- if (j_info.flags & HAVE_APPn_ICC) {
- pdf_obj *icc_stream, *intent;
- int cspc_id;
-
- icc_stream = JPEG_get_iccp(&j_info);
- if (!icc_stream)
- colorspace = NULL;
- else {
- if (iccp_check_colorspace(colortype,
- pdf_stream_dataptr(icc_stream), pdf_stream_length (icc_stream)) < 0)
- colorspace = NULL;
- else {
- cspc_id = iccp_load_profile(NULL, /* noname */
- pdf_stream_dataptr(icc_stream),
- pdf_stream_length (icc_stream));
- if (cspc_id < 0)
- colorspace = NULL;
- else {
- colorspace = pdf_get_colorspace_reference(cspc_id);
- intent = iccp_get_rendering_intent(pdf_stream_dataptr(icc_stream),
- pdf_stream_length (icc_stream));
- if (intent)
- pdf_add_dict(stream_dict, pdf_new_name("Intent"), intent);
- }
- }
- pdf_release_obj(icc_stream);
- }
- }
- /* No ICC or invalid ICC profile. */
- if (!colorspace) {
- switch (colortype) {
- case PDF_COLORSPACE_TYPE_GRAY:
- colorspace = pdf_new_name("DeviceGray");
- break;
- case PDF_COLORSPACE_TYPE_RGB:
- colorspace = pdf_new_name("DeviceRGB");
- break;
- case PDF_COLORSPACE_TYPE_CMYK:
- colorspace = pdf_new_name("DeviceCMYK");
- break;
- }
- }
- pdf_add_dict(stream_dict, pdf_new_name("ColorSpace"), colorspace);
-
-#define IS_ADOBE_CMYK(j) (((j).flags & HAVE_APPn_ADOBE) && (j).num_components == 4)
- if (IS_ADOBE_CMYK(j_info)) {
- pdf_obj *decode;
- int i;
-
- WARN("Adobe CMYK JPEG: Inverted color assumed.");
- decode = pdf_new_array();
- for (i = 0; i < j_info.num_components; i++) {
- pdf_add_array(decode, pdf_new_number(1.0));
- pdf_add_array(decode, pdf_new_number(0.0));
- }
- pdf_add_dict(stream_dict, pdf_new_name("Decode"), decode);
- }
-
- /* Copy file */
- JPEG_copy_stream(&j_info, stream, fp);
-
- info.width = j_info.width;
- info.height = j_info.height;
- info.bits_per_component = j_info.bits_per_component;
- info.num_components = j_info.num_components;
-
- jpeg_get_density(&j_info, &info.xdensity, &info.ydensity);
-
- pdf_ximage_set_image(ximage, &info, stream);
- JPEG_info_clear(&j_info);
-
- return 0;
-}
-
-static void
-jpeg_get_density (struct JPEG_info *j_info, double *xdensity, double *ydensity)
-{
- if (dpx_conf.compat_mode == dpx_mode_compat_mode) {
- *xdensity = *ydensity = 72.0 / 100.0;
- return;
- }
-
-/*
- * j_info->xdpi and j_info->ydpi are determined in most cases
- * in JPEG_scan_file(). FIXME: However, in some kinds of JPEG files,
- * j_info->xdpi, and j_info->ydpi are not determined in
- * JPEG_scan_file(). In this case we assume
- * that j_info->xdpi = j_info->ydpi = 72.0.
- */
- if (j_info->xdpi < 0.1 && j_info->ydpi < 0.1) {
- j_info->xdpi = j_info->ydpi = 72.0;
- }
- *xdensity = 72.0 / j_info->xdpi;
- *ydensity = 72.0 / j_info->ydpi;
-
- return;
-}
-
-static void
-JPEG_info_init (struct JPEG_info *j_info)
-{
- j_info->width = 0;
- j_info->height = 0;
- j_info->bits_per_component = 0;
- j_info->num_components = 0;
-
- j_info->xdpi = 0.0;
- j_info->ydpi = 0.0;
-
- j_info->flags = 0;
- j_info->num_appn = 0;
- j_info->max_appn = 0;
- j_info->appn = NULL;
-
- memset(j_info->skipbits, 0, MAX_COUNT / 8 + 1);
-}
-
-static void
-JPEG_release_APPn_data (JPEG_marker marker, JPEG_APPn_sig app_sig, void *app_data)
-{
- if (marker == JM_APP0 &&
- app_sig == JS_APPn_JFIF) {
- struct JPEG_APPn_JFIF *data;
-
- data = (struct JPEG_APPn_JFIF *) app_data;
- if (data->thumbnail)
- RELEASE(data->thumbnail);
- data->thumbnail = NULL;
-
- RELEASE(data);
- } else if (marker == JM_APP2 && app_sig == JS_APPn_ICC) {
- struct JPEG_APPn_ICC *data;
-
- data = (struct JPEG_APPn_ICC *) app_data;
- if (data->chunk)
- RELEASE(data->chunk);
- data->chunk = NULL;
-
- RELEASE(data);
- } else if (marker == JM_APP14 && app_sig == JS_APPn_ADOBE) {
- struct JPEG_APPn_Adobe *data;
-
- data = (struct JPEG_APPn_Adobe *) app_data;
-
- RELEASE(data);
- } else if (marker == JM_APP1 && app_sig == JS_APPn_XMP) {
- struct JPEG_APPn_XMP *data;
-
- data = (struct JPEG_APPn_XMP *) app_data;
- if (data->packet)
- RELEASE(data->packet);
-
- RELEASE(data);
- }
-}
-
-static void
-JPEG_info_clear (struct JPEG_info *j_info)
-{
- if (j_info->num_appn > 0 &&
- j_info->appn != NULL) {
- int i;
-
- for (i = 0; i < j_info->num_appn; i++)
- JPEG_release_APPn_data(j_info->appn[i].marker,
- j_info->appn[i].app_sig, j_info->appn[i].app_data);
- RELEASE(j_info->appn);
- }
- j_info->appn = NULL;
- j_info->num_appn = 0;
- j_info->max_appn = 0;
- j_info->flags = 0;
-}
-
-static pdf_obj *
-JPEG_get_iccp (struct JPEG_info *j_info)
-{
- pdf_obj *icc_stream;
- struct JPEG_APPn_ICC *icc;
- int i, prev_id = 0, num_icc_seg = -1;
-
- icc_stream = pdf_new_stream(STREAM_COMPRESS);
- for (i = 0; i < j_info->num_appn; i++) {
- if (j_info->appn[i].marker != JM_APP2 ||
- j_info->appn[i].app_sig != JS_APPn_ICC)
- continue;
- icc = (struct JPEG_APPn_ICC *) j_info->appn[i].app_data;
- if (num_icc_seg < 0 && prev_id == 0) {
- num_icc_seg = icc->num_chunks;
- /* ICC chunks are sorted? */
- } else if (icc->seq_id != prev_id + 1 ||
- num_icc_seg != icc->num_chunks || icc->seq_id > icc->num_chunks) {
- WARN("Invalid JPEG ICC chunk: %d (p:%d, n:%d)", icc->seq_id, prev_id, icc->num_chunks);
- pdf_release_obj(icc_stream);
- icc_stream = NULL;
- break;
- }
- pdf_add_stream(icc_stream, icc->chunk, icc->length);
- prev_id = icc->seq_id;
- num_icc_seg = icc->num_chunks;
- }
-
- return icc_stream;
-}
-
-static pdf_obj *
-JPEG_get_XMP (struct JPEG_info *j_info)
-{
- pdf_obj *XMP_stream, *stream_dict;
- struct JPEG_APPn_XMP *XMP;
- int i, count = 0;
-
- /* I don't know if XMP Metadata should be compressed here.*/
- XMP_stream = pdf_new_stream(STREAM_COMPRESS);
- stream_dict = pdf_stream_dict(XMP_stream);
- pdf_add_dict(stream_dict,
- pdf_new_name("Type"), pdf_new_name("Metadata"));
- pdf_add_dict(stream_dict,
- pdf_new_name("Subtype"), pdf_new_name("XML"));
- for (i = 0; i < j_info->num_appn; i++) {
- /* Not sure for the case of multiple segments */
- if (j_info->appn[i].marker != JM_APP1 ||
- j_info->appn[i].app_sig != JS_APPn_XMP)
- continue;
- XMP = (struct JPEG_APPn_XMP *) j_info->appn[i].app_data;
- pdf_add_stream(XMP_stream, XMP->packet, XMP->length);
- count++;
- }
- if (count > 1)
- WARN("%s: Multiple XMP segments found in JPEG file. (untested)", JPEG_DEBUG_STR);
-
- return XMP_stream;
-}
-
-static JPEG_marker
-JPEG_get_marker (FILE *fp)
-{
- int c;
-
- c = fgetc(fp);
- if (c != 255)
- return -1;
-
- for (;;) {
- c = fgetc(fp);
- if (c < 0)
- return -1;
- else if (c > 0 && c < 255) {
- return c;
- }
- }
-}
-
-static int
-add_APPn_marker (struct JPEG_info *j_info, JPEG_marker marker, int app_sig, void *app_data)
-{
- int n;
-
- if (j_info->num_appn >= j_info->max_appn) {
- j_info->max_appn += 16;
- j_info->appn = RENEW(j_info->appn, j_info->max_appn, struct JPEG_ext);
- }
- n = j_info->num_appn;
-
- j_info->appn[n].marker = marker;
- j_info->appn[n].app_sig = app_sig;
- j_info->appn[n].app_data = app_data;
-
- j_info->num_appn += 1;
-
- return n;
-}
-
-static unsigned short
-read_APP14_Adobe (struct JPEG_info *j_info, FILE *fp)
-{
- struct JPEG_APPn_Adobe *app_data;
-
- app_data = NEW(1, struct JPEG_APPn_Adobe);
- app_data->version = get_unsigned_pair(fp);
- app_data->flag0 = get_unsigned_pair(fp);
- app_data->flag1 = get_unsigned_pair(fp);
- app_data->transform = get_unsigned_byte(fp);
-
- add_APPn_marker(j_info, JM_APP14, JS_APPn_ADOBE, app_data);
-
- return 7;
-}
-
-#define JPEG_EXIF_BIGENDIAN 0
-#define JPEG_EXIF_LITTLEENDIAN 1
-static int
-read_exif_bytes (unsigned char **pp, int n, int endian)
-{
- int rval = 0;
- unsigned char *p = *pp;
- int i;
-
- switch (endian) {
- case JPEG_EXIF_BIGENDIAN:
- for (i = 0; i < n; i++) {
- rval = (rval << 8) + p[i];
- }
- break;
- case JPEG_EXIF_LITTLEENDIAN:
- for (i = n - 1; i >= 0; i--) {
- rval = (rval << 8) + p[i];
- }
- break;
- }
-
- *pp += n;
- return rval;
-}
-
-#define JPEG_EXIF_TYPE_BYTE 1
-#define JPEG_EXIF_TYPE_ASCII 2
-#define JPEG_EXIF_TYPE_SHORT 3
-#define JPEG_EXIF_TYPE_LONG 4
-#define JPEG_EXIF_TYPE_RATIONAL 5
-#define JPEG_EXIF_TYPE_UNDEFINED 7
-#define JPEG_EXIF_TYPE_SLONG 9
-#define JPEG_EXIF_TYPE_SRATIONAL 10
-
-#define JPEG_EXIF_TAG_XRESOLUTION 282
-#define JPEG_EXIF_TAG_YRESOLUTION 283
-#define JPEG_EXIF_TAG_RESOLUTIONUNIT 296
-#define JPEG_EXIF_TAG_RESUNIT_MS 0x5110
-#define JPEG_EXIF_TAG_XRES_MS 0x5111
-#define JPEG_EXIF_TAG_YRES_MS 0x5112
-static size_t
-read_APP1_Exif (struct JPEG_info *j_info, FILE *fp, size_t length)
-{
- /* this doesn't save the data, just reads the tags we need */
- /* based on info from http://www.exif.org/Exif2-2.PDF */
- unsigned char *buffer = NEW(length, unsigned char);
- unsigned char *p, *endptr;
- unsigned char *tiff_header;
- int endian;
- int num_fields;
- int value = 0, offset;
- double xres = 0.0, yres = 0.0;
- double res_unit = 1.0;
- unsigned int xres_ms = 0;
- unsigned int yres_ms = 0;
- double res_unit_ms = 0.0;
- double exifxdpi = 0.0, exifydpi = 0.0;
-
- fread(buffer, length, 1, fp);
- if (length < 10)
- goto err;
-
- p = buffer; endptr = buffer + length;
- while ((p < endptr) && (*p == 0))
- p++;
-
- if (p + 8 >= endptr)
- goto err;
- /* TIFF header */
- tiff_header = p;
- if ((p[0] == 'M') && (p[1] == 'M'))
- endian = JPEG_EXIF_BIGENDIAN;
- else if ((p[0] == 'I') && (p[1] == 'I'))
- endian = JPEG_EXIF_LITTLEENDIAN;
- else {
- WARN("%s: Invalid value in Exif TIFF header.", JPEG_DEBUG_STR);
- goto err;
- }
- p += 2;
- value = read_exif_bytes(&p, 2, endian);
- if (value != 42) {
- WARN("%s: Invalid value in Exif TIFF header.", JPEG_DEBUG_STR);
- goto err;
- }
- /* Offset to 0th IFD */
- offset = read_exif_bytes(&p, 4, endian);
-
- p = tiff_header + offset;
- if (p + 2 >= endptr)
- goto err;
- num_fields = read_exif_bytes(&p, 2, endian);
- while (num_fields-- > 0 && p < endptr) {
- int tag, type;
- int count;
- unsigned int den, num;
-
- if (p + 12 > endptr) {
- WARN("%s: Truncated Exif data...", JPEG_DEBUG_STR);
- goto err;
- }
- tag = (int) read_exif_bytes(&p, 2, endian);
- type = (int) read_exif_bytes(&p, 2, endian);
- count = read_exif_bytes(&p, 4, endian);
- /* Exif data is redundant... */
- switch (tag) {
- case JPEG_EXIF_TAG_XRESOLUTION:
- if (type != JPEG_EXIF_TYPE_RATIONAL || count != 1) {
- WARN("%s: Invalid data for XResolution in Exif chunk.", JPEG_DEBUG_STR);
- goto err;
- }
- offset = read_exif_bytes(&p, 4, endian);
- if (tiff_header + offset + 8 > buffer + length) {
- WARN("%s: Invalid offset value in Exif data.", JPEG_DEBUG_STR);
- goto err;
- } else {
- unsigned char *vp = tiff_header + offset;
- num = (unsigned int) read_exif_bytes(&vp, 4, endian);
- den = (unsigned int) read_exif_bytes(&vp, 4, endian);
- }
- if (den > 0)
- xres = (double) num / den;
- break;
- case JPEG_EXIF_TAG_YRESOLUTION:
- if (type != JPEG_EXIF_TYPE_RATIONAL || count != 1) {
- WARN("%s: Invalid data for XResolution in Exif chunk.", JPEG_DEBUG_STR);
- goto err;
- }
- offset = read_exif_bytes(&p, 4, endian);
- if (tiff_header + offset + 8 > buffer + length) {
- WARN("%s: Invalid offset value in Exif data.", JPEG_DEBUG_STR);
- goto err;
- } else {
- unsigned char *vp = tiff_header + offset;
- num = (unsigned int) read_exif_bytes(&vp, 4, endian);
- den = (unsigned int) read_exif_bytes(&vp, 4, endian);
- }
- if (den > 0)
- yres = (double) num / den;
- break;
- case JPEG_EXIF_TAG_RESOLUTIONUNIT:
- if (type != JPEG_EXIF_TYPE_SHORT || count != 1) {
- WARN("%s: Invalid data for ResolutionUnit in Exif chunk.", JPEG_DEBUG_STR);
- goto err;
- }
- value = read_exif_bytes(&p, 2, endian);
- p += 2;
- if (value == 2)
- res_unit = 1.0 ; /* inch */
- else if (value == 3)
- res_unit = 2.54; /* cm */
- break;
- case JPEG_EXIF_TAG_RESUNIT_MS: /* PixelUnit */
- if (type != JPEG_EXIF_TYPE_BYTE || count != 1) {
- WARN("%s: Invalid data for ResolutionUnit in Exif chunk.", JPEG_DEBUG_STR);
- goto err;
- }
- value = read_exif_bytes(&p, 1, endian);
- p += 3;
- if (value == 1)
- res_unit_ms = 0.0254; /* Unit is meter */
- else
- res_unit_ms = 0.0;
- break;
- case JPEG_EXIF_TAG_XRES_MS: /* PixelPerUnitX */
- if (type != JPEG_EXIF_TYPE_LONG || count != 1) {
- WARN("%s: Invalid data for PixelPerUnitX in Exif chunk.", JPEG_DEBUG_STR);
- goto err;
- }
- value = read_exif_bytes(&p, 4, endian);
- xres_ms = value;
- break;
- case JPEG_EXIF_TAG_YRES_MS: /* PixelPerUnitY */
- if (type != JPEG_EXIF_TYPE_LONG || count != 1) {
- WARN("%s: Invalid data for PixelPerUnitY in Exif chunk.", JPEG_DEBUG_STR);
- goto err;
- }
- value = read_exif_bytes(&p, 4, endian);
- yres_ms = value;
- break;
- default:
- /* 40901 ColorSpace and 42240 Gamma unsupported... */
- p += 4;
- break;
- }
- }
- if (num_fields > 0) {
- WARN("%s: Truncated Exif data...", JPEG_DEBUG_STR);
- goto err;
- }
-
-/* Calculate Exif resolution, if given.
- */
- if (xres > 0.0 && yres > 0.0) {
- exifxdpi = xres * res_unit;
- exifydpi = yres * res_unit;
- } else if (xres_ms > 0 && yres_ms > 0 && res_unit_ms > 0.0) {
- exifxdpi = xres_ms * res_unit_ms;
- exifydpi = yres_ms * res_unit_ms;
- } else {
- exifxdpi = 72.0 * res_unit;
- exifydpi = 72.0 * res_unit;
- }
-
-/* Do not overwrite j_info->xdpi and j_info->ydpi if they are
- * already determined in JFIF.
- */
- if (j_info->xdpi < 0.1 && j_info->ydpi < 0.1) {
- j_info->xdpi = exifxdpi;
- j_info->ydpi = exifydpi;
- } else {
- double xxx1 = floor(exifxdpi+0.5);
- double xxx2 = floor(j_info->xdpi+0.5);
- double yyy1 = floor(exifydpi+0.5);
- double yyy2 = floor(j_info->ydpi+0.5);
-
- if (xxx1 != xxx2 || yyy1 != yyy2) {
- WARN("%s: Inconsistent resolution may have " \
- "specified in Exif and JFIF: %gx%g - %gx%g", JPEG_DEBUG_STR,
- xxx1, yyy1, xxx2, yyy2);
- }
- }
-
-err:
- RELEASE(buffer);
- return length;
-}
-
-static size_t
-read_APP0_JFIF (struct JPEG_info *j_info, FILE *fp)
-{
- struct JPEG_APPn_JFIF *app_data;
- size_t thumb_data_len;
-
- app_data = NEW(1, struct JPEG_APPn_JFIF);
- app_data->version = get_unsigned_pair(fp);
- app_data->units = get_unsigned_byte(fp);
- app_data->Xdensity = get_unsigned_pair(fp);
- app_data->Ydensity = get_unsigned_pair(fp);
- app_data->Xthumbnail = get_unsigned_byte(fp);
- app_data->Ythumbnail = get_unsigned_byte(fp);
- thumb_data_len = 3 * app_data->Xthumbnail * app_data->Ythumbnail;
- if (thumb_data_len > 0) {
- app_data->thumbnail = NEW(thumb_data_len, unsigned char);
- fread(app_data->thumbnail, 1, thumb_data_len, fp);
- } else {
- app_data->thumbnail = NULL;
- }
-
- add_APPn_marker(j_info, JM_APP0, JS_APPn_JFIF, app_data);
-
- switch (app_data->units) {
- case 1:
- j_info->xdpi = app_data->Xdensity;
- j_info->ydpi = app_data->Ydensity;
- break;
- case 2: /* density is in pixels per cm */
- j_info->xdpi = app_data->Xdensity * 2.54;
- j_info->ydpi = app_data->Ydensity * 2.54;
- break;
- default: /* FIXME: not sure what to do with this.... */
- j_info->xdpi = 72.0;
- j_info->ydpi = 72.0;
- break;
- }
-
- return (9 + thumb_data_len);
-}
-
-static size_t
-read_APP0_JFXX (FILE *fp, size_t length)
-{
- get_unsigned_byte(fp);
- /* Extension Code:
- *
- * 0x10: Thumbnail coded using JPEG
- * 0x11: Thumbnail stored using 1 byte/pixel
- * 0x13: Thumbnail stored using 3 bytes/pixel
- */
- seek_relative(fp, length - 1); /* Thunbnail image */
-
- /* Ignore */
-
- return length;
-}
-
-static size_t
-read_APP1_XMP (struct JPEG_info *j_info, FILE *fp, size_t length)
-{
- struct JPEG_APPn_XMP *app_data;
-
- app_data = NEW(1, struct JPEG_APPn_XMP);
- app_data->length = length;
- app_data->packet = NEW(app_data->length, unsigned char);
- fread(app_data->packet, 1, app_data->length, fp);
-
- add_APPn_marker(j_info, JM_APP1, JS_APPn_XMP, app_data);
-
- return length;
-}
-
-static size_t
-read_APP2_ICC (struct JPEG_info *j_info, FILE *fp, size_t length)
-{
- struct JPEG_APPn_ICC *app_data;
-
- app_data = NEW(1, struct JPEG_APPn_ICC);
- app_data->seq_id = get_unsigned_byte(fp); /* Starting at 1 */
- app_data->num_chunks = get_unsigned_byte(fp);
- app_data->length = length - 2;
- app_data->chunk = NEW(app_data->length, unsigned char);
- fread(app_data->chunk, 1, app_data->length, fp);
-
- add_APPn_marker(j_info, JM_APP2, JS_APPn_ICC, app_data);
-
- return length;
-}
-
-static int
-JPEG_copy_stream (struct JPEG_info *j_info, pdf_obj *stream, FILE *fp)
-{
- JPEG_marker marker;
- int length;
- int found_SOFn, count;
-
-#define SKIP_CHUNK(j,c) ((j)->skipbits[(c) / 8] & (1 << (7 - (c) % 8)))
-#define COPY_CHUNK(f,s,l) while ((l) > 0) { \
- int nb_read = fread(work_buffer, sizeof(char), MIN((l), WORK_BUFFER_SIZE), (f)); \
- if (nb_read > 0) \
- pdf_add_stream((s), work_buffer, nb_read); \
- (l) -= nb_read; \
-}
- rewind(fp);
- count = 0;
- found_SOFn = 0;
- while (!found_SOFn && count < MAX_COUNT &&
- (marker = JPEG_get_marker(fp)) != (JPEG_marker) - 1) {
- if ( marker == JM_SOI ||
- (marker >= JM_RST0 && marker <= JM_RST7)) {
- work_buffer[0] = (char) 0xff;
- work_buffer[1] = (char) marker;
- pdf_add_stream(stream, work_buffer, 2);
- } else {
- length = get_unsigned_pair(fp) - 2;
- switch (marker) {
- case JM_SOF0: case JM_SOF1: case JM_SOF2: case JM_SOF3:
- case JM_SOF5: case JM_SOF6: case JM_SOF7: case JM_SOF9:
- case JM_SOF10: case JM_SOF11: case JM_SOF13: case JM_SOF14:
- case JM_SOF15:
- work_buffer[0] = (char) 0xff;
- work_buffer[1] = (char) marker;
- work_buffer[2] = ((length + 2) >> 8) & 0xff;
- work_buffer[3] = (length + 2) & 0xff;
- pdf_add_stream(stream, work_buffer, 4);
- COPY_CHUNK(fp, stream, length);
- found_SOFn = 1;
- break;
- default:
- if (SKIP_CHUNK(j_info, count)) {
- seek_relative(fp, length);
- } else {
- work_buffer[0] = (char) 0xff;
- work_buffer[1] = (char) marker;
- work_buffer[2] = ((length + 2) >> 8) & 0xff;
- work_buffer[3] = (length + 2) & 0xff;
- pdf_add_stream(stream, work_buffer, 4);
- COPY_CHUNK(fp, stream, length);
- }
- }
- }
- count++;
- }
- while ((length = fread(work_buffer,
- sizeof(char), WORK_BUFFER_SIZE, fp)) > 0) {
- pdf_add_stream(stream, work_buffer, length);
- }
-
- return (found_SOFn ? 0 : -1);
-}
-
-/* Adobe Technical Note #5116 "Supporting the DCT Filters in PostScript Level 2"
- * 6. "DCTDecode Filter Summary"
- * ... APPn (application-specific) markers are skipped over harmlessly except
- * for the Adobe reserved marker described later.
- *
- */
-#define SET_SKIP(j,c) if ((c) < MAX_COUNT) { \
- (j)->skipbits[(c) / 8] |= (1 << (7 - ((c) % 8))); \
-}
-static int
-JPEG_scan_file (struct JPEG_info *j_info, FILE *fp)
-{
- JPEG_marker marker;
- int found_SOFn, count;
- char app_sig[128];
-
- rewind(fp);
- count = 0;
- found_SOFn = 0;
- while (!found_SOFn &&
- (marker = JPEG_get_marker(fp)) != (JPEG_marker) -1) {
- if ( marker != JM_SOI &&
- (marker < JM_RST0 || marker > JM_RST7)) {
- int length = get_unsigned_pair(fp) - 2;
- switch (marker) {
- case JM_SOF0: case JM_SOF1: case JM_SOF2: case JM_SOF3:
- case JM_SOF5: case JM_SOF6: case JM_SOF7: case JM_SOF9:
- case JM_SOF10: case JM_SOF11: case JM_SOF13: case JM_SOF14:
- case JM_SOF15:
- j_info->bits_per_component = get_unsigned_byte(fp);
- j_info->height = get_unsigned_pair(fp);
- j_info->width = get_unsigned_pair(fp);
- j_info->num_components = get_unsigned_byte(fp);
- found_SOFn = 1;
- break;
- case JM_APP0:
- if (length > 5) {
- if (fread(app_sig, sizeof(char), 5, fp) != 5)
- return -1;
- length -= 5;
- if (!memcmp(app_sig, "JFIF\000", 5)) {
- /* APP0 JFIF marker preserved */
- j_info->flags |= HAVE_APPn_JFIF;
- length -= read_APP0_JFIF(j_info, fp);
- } else if (!memcmp(app_sig, "JFXX", 5)) {
- length -= read_APP0_JFXX(fp, length);
- SET_SKIP(j_info, count);
- } else {
- SET_SKIP(j_info, count);
- }
- } else {
- SET_SKIP(j_info, count);
- }
- seek_relative(fp, length);
- break;
- case JM_APP1:
- if (length > 5) {
- if (fread(app_sig, sizeof(char), 5, fp) != 5)
- return -1;
- length -= 5;
- if (!memcmp(app_sig, "Exif\000", 5)) {
- /* APP1 Exif marker preserved */
- j_info->flags |= HAVE_APPn_Exif;
- length -= read_APP1_Exif(j_info, fp, length);
- } else if (!memcmp(app_sig, "http:", 5) && length > 24) {
- if (fread(app_sig, sizeof(char), 24, fp) != 24)
- return -1;
- length -= 24;
- if (!memcmp(app_sig, "//ns.adobe.com/xap/1.0/\000", 24)) {
- j_info->flags |= HAVE_APPn_XMP;
- length -= read_APP1_XMP(j_info, fp, length);
- }
- SET_SKIP(j_info, count);
- }
- } else {
- SET_SKIP(j_info, count);
- }
- seek_relative(fp, length);
- break;
- case JM_APP2:
- if (length >= 14) {
- if (fread(app_sig, sizeof(char), 12, fp) != 12)
- return -1;
- length -= 12;
- if (!memcmp(app_sig, "ICC_PROFILE\000", 12)) {
- j_info->flags |= HAVE_APPn_ICC;
- length -= read_APP2_ICC(j_info, fp, length);
- }
- }
- seek_relative(fp, length);
- SET_SKIP(j_info, count);
- break;
- case JM_APP14:
- if (length > 5) {
- if (fread(app_sig, sizeof(char), 5, fp) != 5)
- return -1;
- length -= 5;
- if (!memcmp(app_sig, "Adobe", 5)) {
- /* APP14 Adobe marker preserved */
- j_info->flags |= HAVE_APPn_ADOBE;
- length -= read_APP14_Adobe(j_info, fp);
- } else {
- SET_SKIP(j_info, count);
- }
- } else {
- SET_SKIP(j_info, count);
- }
- seek_relative(fp, length);
- break;
- default:
- seek_relative(fp, length);
- if (marker >= JM_APP0 && marker <= JM_APP15) {
- SET_SKIP(j_info, count);
- }
- break;
- }
- }
- count++;
- }
-
- return (found_SOFn ? 0 : -1);
-}
-
-int
-jpeg_get_bbox (FILE *fp, int *width, int *height, double *xdensity, double *ydensity)
-{
- struct JPEG_info j_info;
-
- JPEG_info_init(&j_info);
-
- if (JPEG_scan_file(&j_info, fp) < 0) {
- WARN("%s: Not a JPEG file?", JPEG_DEBUG_STR);
- JPEG_info_clear(&j_info);
- return -1;
- }
-
- *width = j_info.width;
- *height = j_info.height;
-
- jpeg_get_density(&j_info, xdensity, ydensity);
-
- JPEG_info_clear(&j_info);
-
- return 0;
-}