4 * Copyright (C) 2008 The Geeqie Team
8 * This software is released under the GNU General Public License (GNU GPL).
9 * Please read the included file COPYING for more information.
10 * This software comes with no warranty of any kind, use at your own risk!
15 #include "image-load.h"
19 #include "ui_fileops.h"
24 static const gchar *image_loader_path(ImageLoader *il)
31 static void image_loader_sync_pixbuf(ImageLoader *il)
35 if (!il->loader) return;
37 pb = gdk_pixbuf_loader_get_pixbuf(il->loader);
39 if (pb == il->pixbuf) return;
41 if (il->pixbuf) gdk_pixbuf_unref(il->pixbuf);
43 if (il->pixbuf) gdk_pixbuf_ref(il->pixbuf);
46 static void image_loader_area_updated_cb(GdkPixbufLoader *loader,
47 guint x, guint y, guint w, guint h,
50 ImageLoader *il = data;
52 if (il->func_area_ready)
56 image_loader_sync_pixbuf(il);
59 log_printf("critical: area_ready signal with NULL pixbuf (out of mem?)\n");
62 il->func_area_ready(il, x, y, w, h, il->data_area_ready);
66 static void image_loader_area_prepared_cb(GdkPixbufLoader *loader, gpointer data)
72 /* a workaround for http://bugzilla.gnome.org/show_bug.cgi?id=547669 */
73 gchar *format = gdk_pixbuf_format_get_name(gdk_pixbuf_loader_get_format(loader));
74 if (strcmp(format, "svg") == 0)
82 pb = gdk_pixbuf_loader_get_pixbuf(loader);
84 h = gdk_pixbuf_get_height(pb);
85 rs = gdk_pixbuf_get_rowstride(pb);
86 pix = gdk_pixbuf_get_pixels(pb);
88 memset(pix, 0, rs * h); /*this should be faster than pixbuf_fill */
92 static void image_loader_size_cb(GdkPixbufLoader *loader,
93 gint width, gint height, gpointer data)
95 ImageLoader *il = data;
96 GdkPixbufFormat *format;
101 if (il->requested_width < 1 || il->requested_height < 1) return;
103 format = gdk_pixbuf_loader_get_format(loader);
106 mime_types = gdk_pixbuf_format_get_mime_types(format);
108 while (mime_types[n])
110 if (strstr(mime_types[n], "jpeg")) scale = TRUE;
113 g_strfreev(mime_types);
117 if (width > il->requested_width || height > il->requested_height)
121 if (((gdouble)il->requested_width / width) < ((gdouble)il->requested_height / height))
123 nw = il->requested_width;
124 nh = (gdouble)nw / width * height;
129 nh = il->requested_height;
130 nw = (gdouble)nh / height * width;
134 gdk_pixbuf_loader_set_size(loader, nw, nh);
139 static void image_loader_stop(ImageLoader *il)
143 if (il->idle_id != -1)
145 g_source_remove(il->idle_id);
151 /* some loaders do not have a pixbuf till close, order is important here */
152 gdk_pixbuf_loader_close(il->loader, NULL);
153 image_loader_sync_pixbuf(il);
154 g_object_unref(G_OBJECT(il->loader));
158 if (il->load_fd != -1)
167 static void image_loader_done(ImageLoader *il)
169 image_loader_stop(il);
171 if (il->func_done) il->func_done(il, il->data_done);
174 static gint image_loader_done_delay_cb(gpointer data)
176 ImageLoader *il = data;
178 il->idle_done_id = -1;
179 image_loader_done(il);
183 static void image_loader_done_delay(ImageLoader *il)
185 if (il->idle_done_id == -1) il->idle_done_id = g_idle_add_full(il->idle_priority,
186 image_loader_done_delay_cb, il, NULL);
189 static void image_loader_error(ImageLoader *il)
191 image_loader_stop(il);
193 DEBUG_1("pixbuf_loader reported load error for: %s", image_loader_path(il));
195 if (il->func_error) il->func_error(il, il->data_error);
198 static gint image_loader_idle_cb(gpointer data)
200 ImageLoader *il = data;
204 if (!il) return FALSE;
206 if (il->idle_id == -1) return FALSE;
208 c = il->idle_read_loop_count ? il->idle_read_loop_count : 1;
211 b = read(il->load_fd, il->read_buffer, il->read_buffer_size);
215 image_loader_done(il);
219 if (b < 0 || (b > 0 && !gdk_pixbuf_loader_write(il->loader, il->read_buffer, b, NULL)))
221 image_loader_error(il);
230 if (il->func_percent && il->bytes_total > 0)
232 il->func_percent(il, (gdouble)il->bytes_read / il->bytes_total, il->data_percent);
238 static gint image_loader_begin(ImageLoader *il)
241 unsigned int offset = 0;
243 if (!il->loader || il->pixbuf) return FALSE;
245 b = read(il->load_fd, il->read_buffer, il->read_buffer_size);
248 format_raw_img_exif_offsets_fd(il->load_fd, image_loader_path(il), il->read_buffer, b, &offset, NULL))
250 DEBUG_1("Raw file %s contains embedded image", image_loader_path(il));
252 b = read(il->load_fd, il->read_buffer, il->read_buffer_size);
257 image_loader_stop(il);
261 if (!gdk_pixbuf_loader_write(il->loader, il->read_buffer, b, NULL))
263 image_loader_stop(il);
267 il->bytes_read += b + offset;
269 /* read until size is known */
270 while (il->loader && !gdk_pixbuf_loader_get_pixbuf(il->loader) && b > 0)
272 b = read(il->load_fd, il->read_buffer, il->read_buffer_size);
273 if (b < 0 || (b > 0 && !gdk_pixbuf_loader_write(il->loader, il->read_buffer, b, NULL)))
275 image_loader_stop(il);
280 if (!il->pixbuf) image_loader_sync_pixbuf(il);
282 if (il->bytes_read == il->bytes_total || b < 1)
284 /* done, handle (broken) loaders that do not have pixbuf till close */
285 image_loader_stop(il);
287 if (!il->pixbuf) return FALSE;
289 image_loader_done_delay(il);
295 image_loader_stop(il);
299 /* finally, progressive loading :) */
300 il->idle_id = g_idle_add_full(il->idle_priority, image_loader_idle_cb, il, NULL);
305 static gint image_loader_setup(ImageLoader *il)
310 if (!il || il->load_fd != -1 || il->loader) return FALSE;
312 pathl = path_from_utf8(image_loader_path(il));
313 il->load_fd = open(pathl, O_RDONLY | O_NONBLOCK);
315 if (il->load_fd == -1) return FALSE;
317 if (fstat(il->load_fd, &st) == 0)
319 il->bytes_total = st.st_size;
322 il->loader = gdk_pixbuf_loader_new();
323 g_signal_connect(G_OBJECT(il->loader), "area_updated",
324 G_CALLBACK(image_loader_area_updated_cb), il);
325 g_signal_connect(G_OBJECT(il->loader), "size_prepared",
326 G_CALLBACK(image_loader_size_cb), il);
327 g_signal_connect(G_OBJECT(il->loader), "area_prepared",
328 G_CALLBACK(image_loader_area_prepared_cb), il);
332 return image_loader_begin(il);
335 static ImageLoader *image_loader_new_real(FileData *fd, const gchar *path)
339 if (!fd && !path) return NULL;
341 il = g_new0(ImageLoader, 1);
342 if (fd) il->fd = file_data_ref(fd);
343 if (path) il->path = g_strdup(path);
346 il->idle_priority = G_PRIORITY_DEFAULT_IDLE;
354 il->idle_done_id = -1;
356 il->idle_read_loop_count = options->image.idle_read_loop_count;
357 il->read_buffer_size = options->image.read_buffer_size;
358 il->read_buffer = g_new(guchar, il->read_buffer_size);
360 il->requested_width = 0;
361 il->requested_height = 0;
363 DEBUG_1("new image loader %p, bufsize=%u idle_loop=%u", il, il->read_buffer_size, il->idle_read_loop_count);
367 ImageLoader *image_loader_new(FileData *fd)
369 return image_loader_new_real(fd, NULL);
372 ImageLoader *image_loader_new_from_path(const gchar *path)
374 return image_loader_new_real(NULL, path);
377 void image_loader_free(ImageLoader *il)
381 image_loader_stop(il);
382 if (il->idle_done_id != -1) g_source_remove(il->idle_done_id);
383 if (il->pixbuf) gdk_pixbuf_unref(il->pixbuf);
384 if (il->fd) file_data_unref(il->fd);
385 if (il->path) g_free(il->path);
386 if (il->read_buffer) g_free(il->read_buffer);
387 DEBUG_1("freeing image loader %p bytes_read=%d", il, il->bytes_read);
391 /* don't forget to gdk_pixbuf_ref() it if you want to use it after image_loader_free() */
392 GdkPixbuf *image_loader_get_pixbuf(ImageLoader *il)
394 if (!il) return NULL;
399 gchar *image_loader_get_format(ImageLoader *il)
401 GdkPixbufFormat *format;
405 if (!il || !il->loader) return NULL;
407 format = gdk_pixbuf_loader_get_format(il->loader);
408 if (!format) return NULL;
410 mimev = gdk_pixbuf_format_get_mime_types(format);
411 if (!mimev) return NULL;
413 /* return first member of mimev, as GdkPixbufLoader has no way to tell us which exact one ? */
414 mime = g_strdup(mimev[0]);
420 void image_loader_set_area_ready_func(ImageLoader *il,
421 void (*func_area_ready)(ImageLoader *, guint, guint, guint, guint, gpointer),
422 gpointer data_area_ready)
426 il->func_area_ready = func_area_ready;
427 il->data_area_ready = data_area_ready;
430 void image_loader_set_error_func(ImageLoader *il,
431 void (*func_error)(ImageLoader *, gpointer),
436 il->func_error = func_error;
437 il->data_error = data_error;
440 void image_loader_set_done_func(ImageLoader *il,
441 void (*func_done)(ImageLoader *, gpointer),
446 il->func_done = func_done;
447 il->data_done = data_done;
450 void image_loader_set_percent_func(ImageLoader *il,
451 void (*func_percent)(ImageLoader *, gdouble, gpointer),
452 gpointer data_percent)
456 il->func_percent = func_percent;
457 il->data_percent = data_percent;
460 void image_loader_set_requested_size(ImageLoader *il, gint width, gint height)
464 il->requested_width = width;
465 il->requested_height = height;
468 void image_loader_set_buffer_size(ImageLoader *il, guint count)
472 il->idle_read_loop_count = count ? count : 1;
475 void image_loader_set_priority(ImageLoader *il, gint priority)
479 il->idle_priority = priority;
482 gint image_loader_start(ImageLoader *il, void (*func_done)(ImageLoader *, gpointer), gpointer data_done)
484 if (!il) return FALSE;
486 if (!image_loader_path(il)) return FALSE;
488 image_loader_set_done_func(il, func_done, data_done);
490 return image_loader_setup(il);
493 gdouble image_loader_get_percent(ImageLoader *il)
495 if (!il || il->bytes_total == 0) return 0.0;
497 return (gdouble)il->bytes_read / il->bytes_total;
500 gint image_loader_get_is_done(ImageLoader *il)
502 if (!il) return FALSE;
507 gint image_load_dimensions(FileData *fd, gint *width, gint *height)
512 il = image_loader_new(fd);
514 success = image_loader_start(il, NULL, NULL);
516 if (success && il->pixbuf)
518 if (width) *width = gdk_pixbuf_get_width(il->pixbuf);
519 if (height) *height = gdk_pixbuf_get_height(il->pixbuf);;
523 if (width) *width = -1;
524 if (height) *height = -1;
527 image_loader_free(il);