src/image-load-external.cc

   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 "image-load-external.h"
  22
  23 #include <gdk-pixbuf/gdk-pixbuf.h>
  24 #include <glib-object.h>
  25 #include <glib.h>
  26
  27 #include "filedata.h"
  28 #include "image-load.h"
  29 #include "misc.h"
  30 #include "options.h"
  31 #include "ui-fileops.h"
  32
  33 struct ImageLoaderExternal {
  34         ImageLoaderBackendCbAreaUpdated area_updated_cb;
  35         ImageLoaderBackendCbSize size_cb;
  36         ImageLoaderBackendCbAreaPrepared area_prepared_cb;
  37         gpointer data;
  38         GdkPixbuf *pixbuf;
  39         guint requested_width;
  40         guint requested_height;
  41         gboolean abort;
  42 };
  43
  44 static gboolean image_loader_external_load(gpointer loader, const guchar *, gsize, GError **)
  45 {
  46         auto ld = static_cast<ImageLoaderExternal *>(loader);
  47         auto il = static_cast<ImageLoader *>(ld->data);
  48         gchar *cmd_line;
  49         gchar *randname;
  50         gchar *tilde_filename;
  51
  52         tilde_filename = expand_tilde(options->external_preview.extract);
  53
  54         randname = g_strdup("/tmp/geeqie_external_preview_XXXXXX");
  55         g_mkstemp(randname);
  56
  57         cmd_line = g_strdup_printf("\"%s\" \"%s\" \"%s\"" , tilde_filename, il->fd->path, randname);
  58
  59         runcmd(cmd_line);
  60
  61         ld->pixbuf = gdk_pixbuf_new_from_file(randname, nullptr);
  62
  63         ld->area_updated_cb(loader, 0, 0, gdk_pixbuf_get_width(ld->pixbuf), gdk_pixbuf_get_height(ld->pixbuf), ld->data);
  64
  65         g_free(cmd_line);
  66         unlink_file(randname);
  67         g_free(randname);
  68         g_free(tilde_filename);
  69
  70         return TRUE;
  71 }
  72
  73 static gpointer image_loader_external_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
  74 {
  75         auto loader = g_new0(ImageLoaderExternal, 1);
  76         loader->area_updated_cb = area_updated_cb;
  77         loader->size_cb = size_cb;
  78         loader->area_prepared_cb = area_prepared_cb;
  79         loader->data = data;
  80         return loader;
  81 }
  82
  83 static void image_loader_external_set_size(gpointer loader, int width, int height)
  84 {
  85         auto ld = static_cast<ImageLoaderExternal *>(loader);
  86         ld->requested_width = width;
  87         ld->requested_height = height;
  88 }
  89
  90 static GdkPixbuf* image_loader_external_get_pixbuf(gpointer loader)
  91 {
  92         auto ld = static_cast<ImageLoaderExternal *>(loader);
  93         return ld->pixbuf;
  94 }
  95
  96 static gchar* image_loader_external_get_format_name(gpointer)
  97 {
  98         return g_strdup("external");
  99 }
 100
 101 static gchar** image_loader_external_get_format_mime_types(gpointer)
 102 {
 103         static const gchar *mime[] = {"application/octet-stream", nullptr};
 104         return g_strdupv(const_cast<gchar **>(mime));
 105 }
 106
 107 static gboolean image_loader_external_close(gpointer, GError **)
 108 {
 109         return TRUE;
 110 }
 111
 112 static void image_loader_external_abort(gpointer loader)
 113 {
 114         auto ld = static_cast<ImageLoaderExternal *>(loader);
 115         ld->abort = TRUE;
 116 }
 117
 118 static void image_loader_external_free(gpointer loader)
 119 {
 120         auto ld = static_cast<ImageLoaderExternal *>(loader);
 121         if (ld->pixbuf) g_object_unref(ld->pixbuf);
 122         g_free(ld);
 123 }
 124
 125 void image_loader_backend_set_external(ImageLoaderBackend *funcs)
 126 {
 127         funcs->loader_new = image_loader_external_new;
 128         funcs->set_size = image_loader_external_set_size;
 129         funcs->load = image_loader_external_load;
 130         funcs->write = nullptr;
 131         funcs->get_pixbuf = image_loader_external_get_pixbuf;
 132         funcs->close = image_loader_external_close;
 133         funcs->abort = image_loader_external_abort;
 134         funcs->free = image_loader_external_free;
 135         funcs->get_format_name = image_loader_external_get_format_name;
 136         funcs->get_format_mime_types = image_loader_external_get_format_mime_types;
 137 }
 138
 139
 140 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */