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/* gcc eom-thumbnailer.c `pkg-config --cflags --libs glib-2.0 gio-2.0 MagickWand` -lm -o eom-thumbnailer */
/*
* Copyright (C) 2020-2021 MATE developers
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Authors: Robert Buj <rbuj@fedoraproject.org>
*
*/
#define _GNU_SOURCE
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <glib.h>
#include <gio/gio.h>
#include <math.h>
#include <stdlib.h>
#ifdef HAVE_IMAGEMAGICK7
#include <MagickWand/MagickWand.h>
#endif
#ifdef HAVE_IMAGEMAGICK6
#include <wand/magick_wand.h>
#endif
static int output_size = 256;
static gboolean g_fatal_warnings = FALSE;
static char **filenames = NULL;
static char *
get_target_uri (GFile *file)
{
GFileInfo *info;
char *target;
info = g_file_query_info (file, G_FILE_ATTRIBUTE_STANDARD_TARGET_URI, G_FILE_QUERY_INFO_NONE, NULL, NULL);
if (info == NULL)
return NULL;
target = g_strdup (g_file_info_get_attribute_string (info, G_FILE_ATTRIBUTE_STANDARD_TARGET_URI));
g_object_unref (info);
return target;
}
static char *
get_target_path (GFile *input)
{
if (g_file_has_uri_scheme (input, "trash") != FALSE ||
g_file_has_uri_scheme (input, "recent") != FALSE) {
GFile *file;
char *input_uri;
char *input_path;
input_uri = get_target_uri (input);
file = g_file_new_for_uri (input_uri);
g_free (input_uri);
input_path = g_file_get_path (file);
g_object_unref (file);
return input_path;
}
return g_file_get_path (input);
}
static const GOptionEntry entries[] = {
{ "size", 's', 0, G_OPTION_ARG_INT, &output_size, "Size of the thumbnail in pixels", NULL },
{"g-fatal-warnings", '\0', 0, G_OPTION_ARG_NONE, &g_fatal_warnings, "Make all warnings fatal", NULL},
{ G_OPTION_REMAINING, '\0', 0, G_OPTION_ARG_FILENAME_ARRAY, &filenames, NULL, "[INPUT FILE] [OUTPUT FILE]" },
{ 0, '\0', 0, G_OPTION_ARG_NONE, 0, 0, 0 }
};
int main (int argc, char **argv)
{
MagickBooleanType status;
MagickWand *magick_wand;
char *input_filename;
GError *error = NULL;
GOptionContext *context;
GFile *input;
const char *output;
size_t width, height;
/* Options parsing */
context = g_option_context_new ("- thumbnail images");
g_option_context_add_main_entries (context, entries, NULL);
(void) g_option_context_parse (context, &argc, &argv, &error);
g_option_context_free (context);
if (error) {
g_warning ("Couldn't parse command-line options: %s", error->message);
g_error_free (error);
goto arguments_error;
}
/* Set fatal warnings if required */
if (g_fatal_warnings) {
GLogLevelFlags fatal_mask;
fatal_mask = g_log_set_always_fatal (G_LOG_FATAL_MASK);
fatal_mask |= G_LOG_LEVEL_WARNING | G_LOG_LEVEL_CRITICAL;
g_log_set_always_fatal (fatal_mask);
}
if (filenames == NULL || g_strv_length (filenames) != 2) {
g_print ("Expects an input and an output file\n");
goto arguments_error;
}
if (output_size < 1) {
g_warning ("Size cannot be smaller than 1 pixel");
goto arguments_error;
}
input = g_file_new_for_commandline_arg (filenames[0]);
input_filename = get_target_path (input);
g_object_unref (input);
if (input_filename == NULL) {
g_warning ("Could not get file path for %s", filenames[0]);
goto arguments_error;
}
output = filenames[1];
/* Read an image */
MagickWandGenesis ();
magick_wand = NewMagickWand ();
status = MagickReadImage (magick_wand, input_filename);
g_free (input_filename);
if (status == MagickFalse) {
g_warning ("Could not load input file %s", filenames[0]);
goto imagemagick_error;
}
/* Get the image's width and height */
width = MagickGetImageWidth (magick_wand);
height = MagickGetImageHeight (magick_wand);
/* Thumbnail */
if ((height > output_size) || (width > output_size)) {
double scale;
scale = (double) output_size / MAX (width, height);
MagickThumbnailImage (magick_wand,
(size_t) floor (width * scale + 0.5),
(size_t) floor (height * scale + 0.5));
}
/* Write the image then destroy it */
status = MagickWriteImages (magick_wand, output, MagickTrue);
if (status == MagickFalse) {
g_warning ("Could not save output file %s", output);
goto imagemagick_error;
}
g_strfreev (filenames);
if (magick_wand)
DestroyMagickWand (magick_wand);
MagickWandTerminus ();
return 0;
arguments_error:
if (filenames)
g_strfreev (filenames);
return 1;
imagemagick_error:
g_strfreev (filenames);
if (magick_wand)
DestroyMagickWand (magick_wand);
return 1;
}
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