src/image-load-gdk.cc

   1 /*
   2  * Copyright (C) 2004 John Ellis
   3  * Copyright (C) 2008 - 2016 The Geeqie Team
   4  *
   5  * Author: Vladimir Nadvornik
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  */
  21
  22 #include "image-load-gdk.h"
  23
  24 #include <gdk-pixbuf/gdk-pixbuf.h>
  25 #include <glib-object.h>
  26 #include <glib.h>
  27
  28 #include "filedata.h"
  29 #include "image-load.h"
  30
  31 namespace
  32 {
  33
  34 gchar* image_loader_gdk_get_format_name(gpointer loader)
  35 {
  36         GdkPixbufFormat *format;
  37
  38         format = gdk_pixbuf_loader_get_format(GDK_PIXBUF_LOADER(loader));
  39         if (format)
  40                 {
  41                 return gdk_pixbuf_format_get_name(format);
  42                 }
  43
  44         return nullptr;
  45 }
  46
  47 gchar** image_loader_gdk_get_format_mime_types(gpointer loader)
  48 {
  49         return gdk_pixbuf_format_get_mime_types(gdk_pixbuf_loader_get_format(GDK_PIXBUF_LOADER(loader)));
  50 }
  51
  52 gpointer image_loader_gdk_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
  53 {
  54         auto il = static_cast<ImageLoader *>(data);
  55         GdkPixbufLoader *loader;
  56
  57         /** @FIXME gdk-pixbuf-loader does not recognize .xbm files unless
  58          * the mime type is given. There should be a general case */
  59         if (g_ascii_strncasecmp(il->fd->extension, ".xbm", 4) == 0)
  60                 {
  61                 loader = gdk_pixbuf_loader_new_with_mime_type("image/x-xbitmap", nullptr);
  62                 }
  63         else
  64                 {
  65                 loader = gdk_pixbuf_loader_new();
  66                 }
  67
  68         g_signal_connect(G_OBJECT(loader), "area_updated", G_CALLBACK(area_updated_cb), data);
  69         g_signal_connect(G_OBJECT(loader), "size_prepared", G_CALLBACK(size_cb), data);
  70         g_signal_connect(G_OBJECT(loader), "area_prepared", G_CALLBACK(area_prepared_cb), data);
  71         return loader;
  72 }
  73
  74 gboolean image_loader_gdk_write(gpointer loader, const guchar *buf, gsize &chunk_size, gsize, GError **error)
  75 {
  76         return gdk_pixbuf_loader_write(GDK_PIXBUF_LOADER(loader), buf, chunk_size, error);
  77 }
  78
  79 void image_loader_gdk_abort(gpointer)
  80 {
  81 }
  82
  83 void image_loader_gdk_free(gpointer loader)
  84 {
  85         g_object_unref(G_OBJECT(loader));
  86 }
  87
  88 } // namespace
  89
  90 void image_loader_backend_set_default(ImageLoaderBackend *funcs)
  91 {
  92         funcs->loader_new = image_loader_gdk_new;
  93         funcs->set_size = reinterpret_cast<ImageLoaderBackendFuncSetSize>(gdk_pixbuf_loader_set_size);
  94         funcs->write = image_loader_gdk_write;
  95         funcs->get_pixbuf = reinterpret_cast<ImageLoaderBackendFuncGetPixbuf>(gdk_pixbuf_loader_get_pixbuf);
  96         funcs->close = reinterpret_cast<ImageLoaderBackendFuncClose>(gdk_pixbuf_loader_close);
  97         funcs->abort = image_loader_gdk_abort;
  98         funcs->free = image_loader_gdk_free;
  99
 100         funcs->get_format_name = image_loader_gdk_get_format_name;
 101         funcs->get_format_mime_types = image_loader_gdk_get_format_mime_types;
 102 }
 103
 104 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */