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