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 ImageLoaderBackendFuncWrite = gboolean (*)(gpointer, const guchar *, gsize &, gsize, GError **);
40 using ImageLoaderBackendFuncGetPixbuf = GdkPixbuf *(*)(gpointer);
41 using ImageLoaderBackendFuncClose = gboolean (*)(gpointer, GError **);
42 using ImageLoaderBackendFuncAbort = void (*)(gpointer);
43 using ImageLoaderBackendFuncFree = void (*)(gpointer);
44 using ImageLoaderBackendFuncGetFormatName = gchar *(*)(gpointer);
45 using ImageLoaderBackendFuncGetFormatMimeTypes = gchar **(*)(gpointer);
46 using ImageLoaderBackendFuncSetPageNum = void (*)(gpointer, gint);
47 using ImageLoaderBackendFuncGetPageTotal = gint (*)(gpointer);
49 struct ImageLoaderBackend
51 ImageLoaderBackendFuncLoaderNew loader_new;
52 ImageLoaderBackendFuncSetSize set_size;
53 ImageLoaderBackendFuncWrite write;
54 ImageLoaderBackendFuncGetPixbuf get_pixbuf;
55 ImageLoaderBackendFuncClose close;
56 ImageLoaderBackendFuncAbort abort;
57 ImageLoaderBackendFuncFree free;
58 ImageLoaderBackendFuncGetFormatName get_format_name;
59 ImageLoaderBackendFuncGetFormatMimeTypes get_format_mime_types;
60 ImageLoaderBackendFuncSetPageNum set_page_num;
61 ImageLoaderBackendFuncGetPageTotal get_page_total;
64 enum ImageLoaderPreview {
65 IMAGE_LOADER_PREVIEW_NONE = 0,
66 IMAGE_LOADER_PREVIEW_EXIF = 1,
67 IMAGE_LOADER_PREVIEW_LIBRAW = 2
83 ImageLoaderPreview preview;
86 gint requested_height;
94 guint idle_id; /**< event source id */
99 ImageLoaderBackend backend;
101 guint idle_done_id; /**< event source id */
102 GList *area_param_list;
103 GList *area_param_delayed_list;
105 gboolean delay_area_ready;
109 gboolean can_destroy;
110 GCond *can_destroy_cond;
114 gsize read_buffer_size;
115 guint idle_read_loop_count;
118 struct ImageLoaderClass {
122 void (*area_ready)(ImageLoader *, guint x, guint y, guint w, guint h, gpointer);
123 void (*error)(ImageLoader *, gpointer);
124 void (*done)(ImageLoader *, gpointer);
125 void (*percent)(ImageLoader *, gdouble, gpointer);
128 GType image_loader_get_type();
130 ImageLoader *image_loader_new(FileData *fd);
132 void image_loader_free(ImageLoader *il);
135 * @headerfile image_loader_delay_area_ready
136 * delay area_ready signals
138 void image_loader_delay_area_ready(ImageLoader *il, gboolean enable);
141 * @headerfile image_loader_set_requested_size
142 * Speed up loading when you only need at most width x height size image,
143 * only the jpeg GdkPixbuf loader benefits from it - so there is no
144 * guarantee that the image will scale down to the requested size..
146 void image_loader_set_requested_size(ImageLoader *il, gint width, gint height);
148 void image_loader_set_buffer_size(ImageLoader *il, guint count);
151 * @headerfile image_loader_set_priority
152 * this only has effect if used before image_loader_start()
153 * default is G_PRIORITY_DEFAULT_IDLE
155 void image_loader_set_priority(ImageLoader *il, gint priority);
157 gboolean image_loader_start(ImageLoader *il);
160 GdkPixbuf *image_loader_get_pixbuf(ImageLoader *il);
161 gdouble image_loader_get_percent(ImageLoader *il);
162 gboolean image_loader_get_is_done(ImageLoader *il);
163 FileData *image_loader_get_fd(ImageLoader *il);
164 gboolean image_loader_get_shrunk(ImageLoader *il);
165 const gchar *image_loader_get_error(ImageLoader *il);
167 gboolean image_load_dimensions(FileData *fd, gint *width, gint *height);
170 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */