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.
27 #define TYPE_IMAGE_LOADER (image_loader_get_type())
29 using ImageLoaderBackendCbAreaPrepared = void (*)(gpointer, gpointer);
30 using ImageLoaderBackendCbSize = void (*)(gpointer, gint, gint, gpointer);
31 using ImageLoaderBackendCbAreaUpdated = void (*)(gpointer, guint, guint, guint, guint, gpointer);
33 using ImageLoaderBackendFuncLoaderNew = gpointer (*)(ImageLoaderBackendCbAreaUpdated, ImageLoaderBackendCbSize, ImageLoaderBackendCbAreaPrepared, gpointer);
34 using ImageLoaderBackendFuncSetSize = void (*)(gpointer, int, int);
35 using ImageLoaderBackendFuncLoad = gboolean (*)(gpointer, const guchar *, gsize, GError **); /* optional, load whole image at once */
36 using ImageLoaderBackendFuncWrite = gboolean (*)(gpointer, const guchar *, gsize, GError **);
37 using ImageLoaderBackendFuncGetPixbuf = GdkPixbuf *(*)(gpointer);
38 using ImageLoaderBackendFuncClose = gboolean (*)(gpointer, GError **);
39 using ImageLoaderBackendFuncAbort = void (*)(gpointer);
40 using ImageLoaderBackendFuncFree = void (*)(gpointer);
41 using ImageLoaderBackendFuncGetFormatName = gchar *(*)(gpointer);
42 using ImageLoaderBackendFuncGetFormatMimeTypes = gchar **(*)(gpointer);
43 using ImageLoaderBackendFuncSetPageNum = void (*)(gpointer, gint);
44 using ImageLoaderBackendFuncGetPageTotal = gint (*)(gpointer);
46 struct ImageLoaderBackend
48 ImageLoaderBackendFuncLoaderNew loader_new;
49 ImageLoaderBackendFuncSetSize set_size;
50 ImageLoaderBackendFuncLoad load;
51 ImageLoaderBackendFuncWrite write;
52 ImageLoaderBackendFuncGetPixbuf get_pixbuf;
53 ImageLoaderBackendFuncClose close;
54 ImageLoaderBackendFuncAbort abort;
55 ImageLoaderBackendFuncFree free;
56 ImageLoaderBackendFuncGetFormatName get_format_name;
57 ImageLoaderBackendFuncGetFormatMimeTypes get_format_mime_types;
58 ImageLoaderBackendFuncSetPageNum set_page_num;
59 ImageLoaderBackendFuncGetPageTotal get_page_total;
62 enum ImageLoaderPreview {
63 IMAGE_LOADER_PREVIEW_NONE = 0,
64 IMAGE_LOADER_PREVIEW_EXIF = 1,
65 IMAGE_LOADER_PREVIEW_LIBRAW = 2
81 ImageLoaderPreview preview;
84 gint requested_height;
92 guint idle_id; /**< event source id */
97 ImageLoaderBackend backend;
99 guint idle_done_id; /**< event source id */
100 GList *area_param_list;
101 GList *area_param_delayed_list;
103 gboolean delay_area_ready;
107 gboolean can_destroy;
108 GCond *can_destroy_cond;
112 gsize read_buffer_size;
113 guint idle_read_loop_count;
116 struct ImageLoaderClass {
120 void (*area_ready)(ImageLoader *, guint x, guint y, guint w, guint h, gpointer);
121 void (*error)(ImageLoader *, gpointer);
122 void (*done)(ImageLoader *, gpointer);
123 void (*percent)(ImageLoader *, gdouble, gpointer);
126 GType image_loader_get_type();
128 ImageLoader *image_loader_new(FileData *fd);
130 void image_loader_free(ImageLoader *il);
133 * @headerfile image_loader_delay_area_ready
134 * delay area_ready signals
136 void image_loader_delay_area_ready(ImageLoader *il, gboolean enable);
139 * @headerfile image_loader_set_requested_size
140 * Speed up loading when you only need at most width x height size image,
141 * only the jpeg GdkPixbuf loader benefits from it - so there is no
142 * guarantee that the image will scale down to the requested size..
144 void image_loader_set_requested_size(ImageLoader *il, gint width, gint height);
146 void image_loader_set_buffer_size(ImageLoader *il, guint count);
149 * @headerfile image_loader_set_priority
150 * this only has effect if used before image_loader_start()
151 * default is G_PRIORITY_DEFAULT_IDLE
153 void image_loader_set_priority(ImageLoader *il, gint priority);
155 gboolean image_loader_start(ImageLoader *il);
158 GdkPixbuf *image_loader_get_pixbuf(ImageLoader *il);
159 gdouble image_loader_get_percent(ImageLoader *il);
160 gboolean image_loader_get_is_done(ImageLoader *il);
161 FileData *image_loader_get_fd(ImageLoader *il);
162 gboolean image_loader_get_shrunk(ImageLoader *il);
163 const gchar *image_loader_get_error(ImageLoader *il);
165 gboolean image_load_dimensions(FileData *fd, gint *width, gint *height);
168 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */