2 * Copyright (C) 2004 John Ellis
3 * Copyright (C) 2008 - 2016 The Geeqie Team
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.
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.
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.
25 #include <gdk-pixbuf/gdk-pixbuf.h>
26 #include <glib-object.h>
31 #define TYPE_IMAGE_LOADER (image_loader_get_type())
33 using ImageLoaderBackendCbAreaPrepared = void (*)(gpointer, gpointer);
34 using ImageLoaderBackendCbSize = void (*)(gpointer, gint, gint, gpointer);
35 using ImageLoaderBackendCbAreaUpdated = void (*)(gpointer, guint, guint, guint, guint, gpointer);
37 using ImageLoaderBackendFuncLoaderNew = gpointer (*)(ImageLoaderBackendCbAreaUpdated, ImageLoaderBackendCbSize, ImageLoaderBackendCbAreaPrepared, gpointer);
38 using ImageLoaderBackendFuncSetSize = void (*)(gpointer, int, int);
39 using ImageLoaderBackendFuncLoad = gboolean (*)(gpointer, const guchar *, gsize, GError **); /* optional, load whole image at once */
40 using ImageLoaderBackendFuncWrite = gboolean (*)(gpointer, const guchar *, gsize, GError **);
41 using ImageLoaderBackendFuncGetPixbuf = GdkPixbuf *(*)(gpointer);
42 using ImageLoaderBackendFuncClose = gboolean (*)(gpointer, GError **);
43 using ImageLoaderBackendFuncAbort = void (*)(gpointer);
44 using ImageLoaderBackendFuncFree = void (*)(gpointer);
45 using ImageLoaderBackendFuncGetFormatName = gchar *(*)(gpointer);
46 using ImageLoaderBackendFuncGetFormatMimeTypes = gchar **(*)(gpointer);
47 using ImageLoaderBackendFuncSetPageNum = void (*)(gpointer, gint);
48 using ImageLoaderBackendFuncGetPageTotal = gint (*)(gpointer);
50 struct ImageLoaderBackend
52 ImageLoaderBackendFuncLoaderNew loader_new;
53 ImageLoaderBackendFuncSetSize set_size;
54 ImageLoaderBackendFuncLoad load;
55 ImageLoaderBackendFuncWrite write;
56 ImageLoaderBackendFuncGetPixbuf get_pixbuf;
57 ImageLoaderBackendFuncClose close;
58 ImageLoaderBackendFuncAbort abort;
59 ImageLoaderBackendFuncFree free;
60 ImageLoaderBackendFuncGetFormatName get_format_name;
61 ImageLoaderBackendFuncGetFormatMimeTypes get_format_mime_types;
62 ImageLoaderBackendFuncSetPageNum set_page_num;
63 ImageLoaderBackendFuncGetPageTotal get_page_total;
66 enum ImageLoaderPreview {
67 IMAGE_LOADER_PREVIEW_NONE = 0,
68 IMAGE_LOADER_PREVIEW_EXIF = 1,
69 IMAGE_LOADER_PREVIEW_LIBRAW = 2
85 ImageLoaderPreview preview;
88 gint requested_height;
96 guint idle_id; /**< event source id */
101 ImageLoaderBackend backend;
103 guint idle_done_id; /**< event source id */
104 GList *area_param_list;
105 GList *area_param_delayed_list;
107 gboolean delay_area_ready;
111 gboolean can_destroy;
112 GCond *can_destroy_cond;
116 gsize read_buffer_size;
117 guint idle_read_loop_count;
120 struct ImageLoaderClass {
124 void (*area_ready)(ImageLoader *, guint x, guint y, guint w, guint h, gpointer);
125 void (*error)(ImageLoader *, gpointer);
126 void (*done)(ImageLoader *, gpointer);
127 void (*percent)(ImageLoader *, gdouble, gpointer);
130 GType image_loader_get_type();
132 ImageLoader *image_loader_new(FileData *fd);
134 void image_loader_free(ImageLoader *il);
137 * @headerfile image_loader_delay_area_ready
138 * delay area_ready signals
140 void image_loader_delay_area_ready(ImageLoader *il, gboolean enable);
143 * @headerfile image_loader_set_requested_size
144 * Speed up loading when you only need at most width x height size image,
145 * only the jpeg GdkPixbuf loader benefits from it - so there is no
146 * guarantee that the image will scale down to the requested size..
148 void image_loader_set_requested_size(ImageLoader *il, gint width, gint height);
150 void image_loader_set_buffer_size(ImageLoader *il, guint count);
153 * @headerfile image_loader_set_priority
154 * this only has effect if used before image_loader_start()
155 * default is G_PRIORITY_DEFAULT_IDLE
157 void image_loader_set_priority(ImageLoader *il, gint priority);
159 gboolean image_loader_start(ImageLoader *il);
162 GdkPixbuf *image_loader_get_pixbuf(ImageLoader *il);
163 gdouble image_loader_get_percent(ImageLoader *il);
164 gboolean image_loader_get_is_done(ImageLoader *il);
165 FileData *image_loader_get_fd(ImageLoader *il);
166 gboolean image_loader_get_shrunk(ImageLoader *il);
167 const gchar *image_loader_get_error(ImageLoader *il);
169 gboolean image_load_dimensions(FileData *fd, gint *width, gint *height);
172 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */