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-rw-r--r--jpeg-utils.c280
1 files changed, 0 insertions, 280 deletions
diff --git a/jpeg-utils.c b/jpeg-utils.c
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index dc1c880..0000000
--- a/jpeg-utils.c
+++ /dev/null
@@ -1,280 +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 <libexif/exif-data.h>
-#include <libexif/exif-content.h>
-#include <libexif/exif-entry.h>
-
-#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 *data)
-{
- ExifData *edata;
- ExifEntry *entry;
- ExifContent *content;
- int i, j;
-
- if (data == NULL)
- data = malloc (sizeof (TExifData));
- memset (data, 0, sizeof (TExifData));
- edata = exif_data_new_from_file (filename);
- if (edata == NULL)
- return -1;
-
- for (i = 0; i < EXIF_IFD_COUNT; i++) {
- content = edata->ifd[i];
- if ((content == NULL) || (content->count == 0))
- continue;
-
- for (j = 0; j < content->count; j++) {
- entry = content->entries[j];
-
- if (! content->entries[j])
- continue;
-
- #define VALUE_LEN 1024
- char value[VALUE_LEN + 1];
-
- switch (entry->tag)
- {
- case EXIF_TAG_DATE_TIME:
- data->datetime = strdup (exif_entry_get_value (entry, value, VALUE_LEN));
- break;
-
- case EXIF_TAG_DATE_TIME_ORIGINAL:
- case EXIF_TAG_DATE_TIME_DIGITIZED:
- if (data->datetime == NULL)
- data->datetime = strdup (exif_entry_get_value (entry, value, VALUE_LEN));
- break;
-
- case EXIF_TAG_MODEL:
- if (data->camera_model == NULL)
- data->camera_model = strdup (exif_entry_get_value (entry, value, VALUE_LEN));
- break;
-
- case EXIF_TAG_MAKE:
- if (data->camera_model == NULL)
- data->camera_model = strdup (exif_entry_get_value (entry, value, VALUE_LEN));
- break;
-
- case EXIF_TAG_ISO_SPEED_RATINGS:
- data->iso = strdup (exif_entry_get_value (entry, value, VALUE_LEN));
- break;
-
- case EXIF_TAG_FOCAL_LENGTH:
- data->focal_length = strdup (exif_entry_get_value (entry, value, VALUE_LEN));
- break;
-
- case EXIF_TAG_FOCAL_LENGTH_IN_35MM_FILM:
- data->focal_length_35mm = strdup (exif_entry_get_value (entry, value, VALUE_LEN));
- break;
-
- case EXIF_TAG_FNUMBER:
- data->aperture = strdup (exif_entry_get_value (entry, value, VALUE_LEN));
- break;
-
- case EXIF_TAG_APERTURE_VALUE:
- if (data->aperture == NULL)
- data->aperture = strdup (exif_entry_get_value (entry, value, VALUE_LEN));
- break;
-
- case EXIF_TAG_EXPOSURE_TIME:
- data->exposure = strdup (exif_entry_get_value (entry, value, VALUE_LEN));
- break;
-
- case EXIF_TAG_FLASH:
- data->flash = strdup (exif_entry_get_value (entry, value, VALUE_LEN));
- break;
-
- case EXIF_TAG_PIXEL_X_DIMENSION:
- data->width = atol (exif_entry_get_value (entry, value, VALUE_LEN));
- break;
-
- case EXIF_TAG_PIXEL_Y_DIMENSION:
- data->height = atol (exif_entry_get_value (entry, value, VALUE_LEN));
- break;
-
- default:
- break;
- }
- }
- }
- exif_data_free (edata);
-
- #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_TAG_PIXEL_X_DIMENSION = %lu\n", data->width);
- printf("EXIF_TAG_PIXEL_Y_DIMENSION = %lu\n", data->height);
- #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);
- 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)
-{
- #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);
- 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 = max_width / real_ratio;
- *width = max_width;
- }
- else
- {
- *width = max_height * real_ratio;
- *height = max_height;
- }
-}
-
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