diff options
Diffstat (limited to 'jpeg-utils.cpp')
| -rw-r--r-- | jpeg-utils.cpp | 429 |
1 files changed, 0 insertions, 429 deletions
diff --git a/jpeg-utils.cpp b/jpeg-utils.cpp deleted file mode 100644 index 6ccf491..0000000 --- a/jpeg-utils.cpp +++ /dev/null @@ -1,429 +0,0 @@ -/* Cataract - Static web photo gallery generator - * Copyright (C) 2008 Tomas Bzatek <tbzatek@users.sourceforge.net> - * - * 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 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - */ -#include <stdio.h> -#include <string.h> -#include <stdlib.h> - -#include <exiv2/image.hpp> -#include <exiv2/exif.hpp> - -#include <wand/magick-wand.h> - -#include "jpeg-utils.h" - - - -/* - * get_exif: retrieve EXIF informations from a JPEG image - */ -int -get_exif (const char *filename, TExifData **exif_data) -{ - TExifData *data; - - data = (TExifData*) malloc (sizeof (TExifData)); - memset (data, 0, sizeof (TExifData)); - *exif_data = data; - - try - { - Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(filename); - g_assert (image.get() != 0); - image->readMetadata(); - - Exiv2::ExifData &exifData = image->exifData(); - if (! exifData.empty()) { - /* EXIF::Aperture */ - try { - float val = exifData["Exif.Photo.FNumber"].toFloat(); - if (val >= 0) - data->aperture = g_strdup_printf ("f/%.1f", val); - } catch (...) { } - - /* EXIF::Camera model */ - try { - const char *val = exifData["Exif.Image.Model"].toString().c_str(); - if (val && strlen(val) > 0) - data->camera_model = strdup (val); - } catch (...) { } - - /* EXIF::DateTime */ - try { - const char *val = NULL; - try { - val = exifData["Exif.Photo.DateTimeOriginal"].toString().c_str(); - } catch (...) { } - if ((! val) || (strlen(val) == 0)) - try { - val = exifData["Exif.Image.DateTime"].toString().c_str(); - } catch (...) { } - - if (val && strlen(val) > 0) { - static struct tm tt; - static char conv[1024]; - - if (sscanf (val, "%d:%d:%d %d:%d:%d", &tt.tm_year, &tt.tm_mon, &tt.tm_mday, &tt.tm_hour, &tt.tm_min, &tt.tm_sec) == 6) - { - tt.tm_year -= 1900; - tt.tm_mon--; - if (strftime (&conv[0], sizeof(conv), "%c", &tt)) - data->datetime = strdup (&conv[0]); - } - } - } catch (...) { } - - /* EXIF::Shutter speed */ - try { - float val = exifData["Exif.Photo.ExposureTime"].toFloat(); - if (val > 0) { - if (val < 0.5) - data->exposure = g_strdup_printf ("1/%.0f s", 1/val); - else - data->exposure = g_strdup_printf ("%.1f s", val); - } - } catch (...) { } - - /* EXIF::Flash */ - try { - long int val = exifData["Exif.Photo.Flash"].toLong(); - if ((val > 0) && ((val & 1) == 1)) - data->flash = strdup ((char *) "Flash fired"); - else - data->flash = strdup ((char *) "--"); - } catch (...) { } - - /* EXIF::Focal length */ - try { - float val = exifData["Exif.Photo.FocalLength"].toFloat(); - if (val >= 0) - data->focal_length = g_strdup_printf ("%.0f mm", val); - } catch (...) { } - - /* EXIF::ISO */ - try { - long int val = exifData["Exif.Photo.ISOSpeedRatings"].toLong(); - if (val > 0) - data->iso = g_strdup_printf ("%ld", val); - } catch (...) { } - - /* EXIF::Software */ - try { - data->exif_software = strdup (exifData["Exif.Image.Software"].toString().c_str()); - } catch (...) { } - - /* EXIF::Image description */ - try { - data->exif_imgdesc = strdup (exifData["Exif.Image.ImageDescription"].toString().c_str()); - } catch (...) { } - - /* EXIF::Artist */ - try { - data->exif_artist = strdup (exifData["Exif.Image.Artist"].toString().c_str()); - } catch (...) { } - - /* EXIF::Copyright */ - try { - data->exif_copyright = strdup (exifData["Exif.Image.Copyright"].toString().c_str()); - } catch (...) { } - - /* EXIF::User comment */ - try { - data->exif_usercomment = strdup (exifData["Exif.Photo.UserComment"].toString().c_str()); - } catch (...) { } - } - - Exiv2::IptcData &iptcData = image->iptcData(); - if (! iptcData.empty()) { - /* IPTC::Object name */ - try { - data->iptc_objectname = strdup (iptcData["Iptc.Application2.ObjectName"].toString().c_str()); - } catch (...) { } - - /* IPTC::Copyright */ - try { - data->iptc_copyright = strdup (iptcData["Iptc.Application2.Copyright"].toString().c_str()); - } catch (...) { } - - /* IPTC::Credit */ - try { - data->iptc_credit = strdup (iptcData["Iptc.Application2.Credit"].toString().c_str()); - } catch (...) { } - - /* IPTC::Caption */ - try { - data->iptc_caption = strdup (iptcData["Iptc.Application2.Caption"].toString().c_str()); - } catch (...) { } - - /* IPTC::Author */ - try { - data->iptc_author = strdup (iptcData["Iptc.Application2.Byline"].toString().c_str()); - } catch (...) { } - } - - /* JPEG::Comment */ - try { - data->jpeg_comment = strdup (image->comment().c_str()); - } catch (...) { } - } - catch (Exiv2::AnyError& e) - { - fprintf (stderr, "get_exif: Caught Exiv2 exception: '%s'\n", e.what()); - return -1; - } - -#ifdef __DEBUG_ALL__ - printf("EXIF_TAG_DATE_TIME = '%s'\n", data->datetime); - printf("EXIF_TAG_MODEL = '%s'\n", data->camera_model); - printf("EXIF_TAG_ISO_SPEED_RATINGS = '%s'\n", data->iso); - printf("EXIF_TAG_FOCAL_LENGTH = '%s'\n", data->focal_length); - printf("EXIF_TAG_FOCAL_LENGTH_IN_35MM_FILM = '%s'\n", data->focal_length_35mm); - printf("EXIF_TAG_FNUMBER = '%s'\n", data->aperture); - printf("EXIF_TAG_EXPOSURE_TIME = '%s'\n", data->exposure); - printf("EXIF_TAG_FLASH = '%s'\n", data->flash); - printf("Exif.Image.Software = '%s'\n", data->exif_software); - printf("Exif.Image.ImageDescription = '%s'\n", data->exif_imgdesc); - printf("Exif.Image.Artist = '%s'\n", data->exif_artist); - printf("Exif.Image.Copyright = '%s'\n", data->exif_copyright); - printf("Exif.Photo.UserComment = '%s'\n", data->exif_usercomment); - printf("Iptc.Application2.ObjectName = '%s'\n", data->iptc_objectname); - printf("Iptc.Application2.Copyright = '%s'\n", data->iptc_copyright); - printf("Iptc.Application2.Credit = '%s'\n", data->iptc_credit); - printf("Iptc.Application2.Caption = '%s'\n", data->iptc_caption); - printf("Iptc.Application2.Byline = '%s'\n", data->iptc_author); - printf("JPEG comment = '%s'\n", data->jpeg_comment); -#endif - - return 0; -} - -/* - * free_exif_struct: free allocated structure - */ -void -free_exif_data (TExifData *data) -{ - if (data) { - if (data->aperture) - free (data->aperture); - if (data->camera_model) - free (data->camera_model); - if (data->datetime) - free (data->datetime); - if (data->exposure) - free (data->exposure); - if (data->flash) - free (data->flash); - if (data->focal_length) - free (data->focal_length); - if (data->focal_length_35mm) - free (data->focal_length_35mm); - if (data->iso) - free (data->iso); - - if (data->exif_software) - free (data->exif_software); - if (data->exif_imgdesc) - free (data->exif_imgdesc); - if (data->exif_artist) - free (data->exif_artist); - if (data->exif_copyright) - free (data->exif_copyright); - if (data->exif_usercomment) - free (data->exif_usercomment); - - if (data->iptc_objectname) - free (data->iptc_objectname); - if (data->iptc_copyright) - free (data->iptc_copyright); - if (data->iptc_credit) - free (data->iptc_credit); - if (data->iptc_caption) - free (data->iptc_caption); - if (data->iptc_author) - free (data->iptc_author); - - if (data->jpeg_comment) - free (data->jpeg_comment); - - free (data); - data = NULL; - } -} - - -/* - * resize_image: resize image pointed by src and save result to dst - */ -gboolean -resize_image (const char *src, const char *dst, - int size_x, int size_y, - int quality, - gboolean thumbnail) -{ - #define ThrowWandException(wand) \ - { \ - char *description; \ - ExceptionType severity; \ - \ - description = MagickGetException (wand, &severity); \ - (void) fprintf (stderr, "Error converting image: %s %s %ld %s\n", GetMagickModule(), description); \ - description = (char*) MagickRelinquishMemory (description); \ - return FALSE; \ - } - - MagickBooleanType status; - MagickWand *magick_wand; - - /* Read an image. */ - MagickWandGenesis(); - magick_wand = NewMagickWand(); - status = MagickReadImage (magick_wand, src); - if (status == MagickFalse) - ThrowWandException (magick_wand); - if (thumbnail) - MagickThumbnailImage (magick_wand, size_x, size_y); - else - MagickResizeImage (magick_wand, size_x, size_y, LanczosFilter, 1.0); - MagickSetImageCompressionQuality (magick_wand, quality); - - /* Write the image and destroy it. */ - status = MagickWriteImage (magick_wand, dst); - if (status == MagickFalse) - ThrowWandException (magick_wand); - magick_wand = DestroyMagickWand (magick_wand); - MagickWandTerminus(); - - return TRUE; -} - - -/* - * get_image_sizes: retrieve image dimensions - */ -void -get_image_sizes (const char *img, - unsigned long *width, unsigned long *height) -{ - #define xThrowWandException(wand) \ - { \ - char *description; \ - ExceptionType severity; \ - \ - description = MagickGetException (wand, &severity); \ - (void) fprintf (stderr, "Error reading image info: %s %s %ld %s\n", GetMagickModule(), description); \ - description = (char*) MagickRelinquishMemory(description); \ - return; \ - } - - MagickBooleanType status; - MagickWand *magick_wand; - - *width = -1; - *height = -1; - - /* Read an image. */ - MagickWandGenesis(); - magick_wand = NewMagickWand(); - status = MagickPingImage (magick_wand, img); - if (status == MagickFalse) - xThrowWandException (magick_wand); - *width = MagickGetImageWidth (magick_wand); - *height = MagickGetImageHeight (magick_wand); - - magick_wand = DestroyMagickWand (magick_wand); - MagickWandTerminus(); -} - - -/* - * calculate_sizes: calculate maximal image sizes within specified limits keeping aspect ratio - */ -void -calculate_sizes (const unsigned long max_width, const unsigned long max_height, - unsigned long *width, unsigned long *height) -{ - if ((max_width > *width) && (max_height > *height)) - return; - - double max_ratio = (double) max_width / (double) max_height; - double real_ratio = (double) *width / (double) *height; - - if ((*width > *height) && (max_ratio <= real_ratio)) - { - *height = (unsigned long) (max_width / real_ratio); - *width = max_width; - } - else - { - *width = (unsigned long) (max_height * real_ratio); - *height = max_height; - } -} - - -/* - * modify_exif: - strip thumbnail stored in EXIF table - * - add copyright to Exif::Image::Copyright and Iptc::Application2::Copyright - */ -void -modify_exif (const char *filename, gboolean strip_thumbnail, const char *add_copyright) -{ - bool was_modified = false; - - if ((! strip_thumbnail) && (add_copyright == NULL)) - return; - - try - { - Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(filename); - g_assert (image.get() != 0); - - image->readMetadata(); - Exiv2::ExifData &exifData = image->exifData(); - if (add_copyright) { - exifData["Exif.Image.Copyright"] = add_copyright; - image->iptcData()["Iptc.Application2.Copyright"] = add_copyright; - was_modified = true; - } - - if (strip_thumbnail && (! exifData.empty())) { -#ifdef _EXIV2_NEW_API - Exiv2::ExifThumb exifThumb(image->exifData()); - std::string thumbExt = exifThumb.extension(); -#else - std::string thumbExt = exifData.thumbnailExtension(); -#endif - - if (! thumbExt.empty()) { -#ifdef _EXIV2_NEW_API - exifThumb.erase(); -#else - exifData.eraseThumbnail(); -#endif - was_modified = true; - } - } - - if (was_modified) - image->writeMetadata(); - } - catch (Exiv2::AnyError& e) - { - fprintf (stderr, "modify_exif: Caught Exiv2 exception: '%s'\n", e.what()); - } -} |