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 #define TYPE_IMAGE_LOADER (image_loader_get_type())
27 typedef void (*ImageLoaderBackendCbAreaPrepared)(gpointer loader, gpointer data);
28 typedef void (*ImageLoaderBackendCbSize)(gpointer loader, gint width, gint height, gpointer data);
29 typedef void (*ImageLoaderBackendCbAreaUpdated)(gpointer loader, guint x, guint y, guint w, guint h, gpointer data);
31 typedef gpointer (*ImageLoaderBackendFuncLoaderNew)(ImageLoaderBackendCbAreaUpdated, ImageLoaderBackendCbSize, ImageLoaderBackendCbAreaPrepared, gpointer data);
32 typedef void (*ImageLoaderBackendFuncSetSize)(gpointer loader, int width, int height);
33 typedef gboolean (*ImageLoaderBackendFuncLoad)(gpointer loader, const guchar *buf, gsize count, GError **error); /* optional, load whole image at once */
34 typedef gboolean (*ImageLoaderBackendFuncWrite)(gpointer loader, const guchar *buf, gsize count, GError **error);
35 typedef GdkPixbuf* (*ImageLoaderBackendFuncGetPixbuf)(gpointer loader);
36 typedef gboolean (*ImageLoaderBackendFuncClose)(gpointer loader, GError **error);
37 typedef void (*ImageLoaderBackendFuncAbort)(gpointer loader);
38 typedef void (*ImageLoaderBackendFuncFree)(gpointer loader);
39 typedef gchar* (*ImageLoaderBackendFuncGetFormatName)(gpointer loader);
40 typedef gchar** (*ImageLoaderBackendFuncGetFormatMimeTypes)(gpointer loader);
42 typedef struct _ImageLoaderBackend ImageLoaderBackend;
43 struct _ImageLoaderBackend
45 ImageLoaderBackendFuncLoaderNew loader_new;
46 ImageLoaderBackendFuncSetSize set_size;
47 ImageLoaderBackendFuncLoad load;
48 ImageLoaderBackendFuncWrite write;
49 ImageLoaderBackendFuncGetPixbuf get_pixbuf;
50 ImageLoaderBackendFuncClose close;
51 ImageLoaderBackendFuncAbort abort;
52 ImageLoaderBackendFuncFree free;
53 ImageLoaderBackendFuncGetFormatName get_format_name;
54 ImageLoaderBackendFuncGetFormatMimeTypes get_format_mime_types;
58 //typedef struct _ImageLoader ImageLoader;
59 typedef struct _ImageLoaderClass ImageLoaderClass;
76 gint requested_height;
84 guint idle_id; /* event source id */
89 ImageLoaderBackend backend;
91 guint idle_done_id; /* event source id */
92 GList *area_param_list;
93 GList *area_param_delayed_list;
95 gboolean delay_area_ready;
100 GCond *can_destroy_cond;
104 gsize read_buffer_size;
105 guint idle_read_loop_count;
108 struct _ImageLoaderClass {
112 void (*area_ready)(ImageLoader *, guint x, guint y, guint w, guint h, gpointer);
113 void (*error)(ImageLoader *, gpointer);
114 void (*done)(ImageLoader *, gpointer);
115 void (*percent)(ImageLoader *, gdouble, gpointer);
118 GType image_loader_get_type(void);
120 ImageLoader *image_loader_new(FileData *fd);
122 void image_loader_free(ImageLoader *il);
124 /* delay area_ready signals */
125 void image_loader_delay_area_ready(ImageLoader *il, gboolean enable);
127 /* Speed up loading when you only need at most width x height size image,
128 * only the jpeg GdkPixbuf loader benefits from it - so there is no
129 * guarantee that the image will scale down to the requested size..
131 void image_loader_set_requested_size(ImageLoader *il, gint width, gint height);
133 void image_loader_set_buffer_size(ImageLoader *il, guint size);
135 /* this only has effect if used before image_loader_start()
136 * default is G_PRIORITY_DEFAULT_IDLE
138 void image_loader_set_priority(ImageLoader *il, gint priority);
140 gboolean image_loader_start(ImageLoader *il);
143 GdkPixbuf *image_loader_get_pixbuf(ImageLoader *il);
144 gchar *image_loader_get_format(ImageLoader *il);
145 gdouble image_loader_get_percent(ImageLoader *il);
146 gboolean image_loader_get_is_done(ImageLoader *il);
147 FileData *image_loader_get_fd(ImageLoader *il);
148 gboolean image_loader_get_shrunk(ImageLoader *il);
149 const gchar *image_loader_get_error(ImageLoader *il);
151 gboolean image_load_dimensions(FileData *fd, gint *width, gint *height);
154 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */