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