src/image_load_external.c

   1 /*
   2  * Copyright (C) 2021 - The Geeqie Team
   3  *
   4  * Author: Colin Clark
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21 #include "main.h"
  22
  23 #include "image-load.h"
  24 #include "image_load_external.h"
  25
  26 #include "misc.h"
  27 #include "ui_fileops.h"
  28
  29 typedef struct _ImageLoaderExternal ImageLoaderExternal;
  30 struct _ImageLoaderExternal {
  31         ImageLoaderBackendCbAreaUpdated area_updated_cb;
  32         ImageLoaderBackendCbSize size_cb;
  33         ImageLoaderBackendCbAreaPrepared area_prepared_cb;
  34         gpointer data;
  35         GdkPixbuf *pixbuf;
  36         guint requested_width;
  37         guint requested_height;
  38         gboolean abort;
  39 };
  40
  41 static gboolean image_loader_external_load(gpointer loader, const guchar *buf, gsize count, GError **error)
  42 {
  43         ImageLoaderExternal *ld = (ImageLoaderExternal *) loader;
  44         ImageLoader *il = ld->data;
  45         gchar *cmd_line;
  46         gchar *randname;
  47         gchar *tilde_filename;
  48
  49         tilde_filename = expand_tilde(options->external_preview.extract);
  50
  51         randname = g_strdup("/tmp/geeqie_external_preview_XXXXXX");
  52         g_mkstemp(randname);
  53
  54         cmd_line = g_strdup_printf("\"%s\" \"%s\" \"%s\"" , tilde_filename, il->fd->path, randname);
  55
  56         runcmd(cmd_line);
  57
  58         ld->pixbuf = gdk_pixbuf_new_from_file(randname, NULL);
  59
  60         ld->area_updated_cb(loader, 0, 0, gdk_pixbuf_get_width(ld->pixbuf), gdk_pixbuf_get_height(ld->pixbuf), ld->data);
  61
  62         g_free(cmd_line);
  63         unlink_file(randname);
  64         g_free(randname);
  65         g_free(tilde_filename);
  66
  67         return TRUE;
  68 }
  69
  70 static gpointer image_loader_external_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
  71 {
  72         ImageLoaderExternal *loader = g_new0(ImageLoaderExternal, 1);
  73         loader->area_updated_cb = area_updated_cb;
  74         loader->size_cb = size_cb;
  75         loader->area_prepared_cb = area_prepared_cb;
  76         loader->data = data;
  77         return (gpointer) loader;
  78 }
  79
  80 static void image_loader_external_set_size(gpointer loader, int width, int height)
  81 {
  82         ImageLoaderExternal *ld = (ImageLoaderExternal *) loader;
  83         ld->requested_width = width;
  84         ld->requested_height = height;
  85 }
  86
  87 static GdkPixbuf* image_loader_external_get_pixbuf(gpointer loader)
  88 {
  89         ImageLoaderExternal *ld = (ImageLoaderExternal *) loader;
  90         return ld->pixbuf;
  91 }
  92
  93 static gchar* image_loader_external_get_format_name(gpointer loader)
  94 {
  95         return g_strdup("external");
  96 }
  97
  98 static gchar** image_loader_external_get_format_mime_types(gpointer loader)
  99 {
 100         static gchar *mime[] = {"application/octet-stream", NULL};
 101         return g_strdupv(mime);
 102 }
 103
 104 static gboolean image_loader_external_close(gpointer loader, GError **error)
 105 {
 106         return TRUE;
 107 }
 108
 109 static void image_loader_external_abort(gpointer loader)
 110 {
 111         ImageLoaderExternal *ld = (ImageLoaderExternal *) loader;
 112         ld->abort = TRUE;
 113 }
 114
 115 static void image_loader_external_free(gpointer loader)
 116 {
 117         ImageLoaderExternal *ld = (ImageLoaderExternal *) loader;
 118         if (ld->pixbuf) g_object_unref(ld->pixbuf);
 119         g_free(ld);
 120 }
 121
 122 void image_loader_backend_set_external(ImageLoaderBackend *funcs)
 123 {
 124         funcs->loader_new = image_loader_external_new;
 125         funcs->set_size = image_loader_external_set_size;
 126         funcs->load = image_loader_external_load;
 127         funcs->write = NULL;
 128         funcs->get_pixbuf = image_loader_external_get_pixbuf;
 129         funcs->close = image_loader_external_close;
 130         funcs->abort = image_loader_external_abort;
 131         funcs->free = image_loader_external_free;
 132         funcs->get_format_name = image_loader_external_get_format_name;
 133         funcs->get_format_mime_types = image_loader_external_get_format_mime_types;
 134 }
 135
 136
 137 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */