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gimp/plug-ins/common/animation-play.c

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Import Upstream version 2.10.32
2022-11-23 10:54:48 +08:00
/*
* Animation Playback plug-in version 0.99.1
*
* (c) Adam D. Moss : 1997-2000 : adam@gimp.org : adam@foxbox.org
* (c) Mircea Purdea : 2009 : someone_else@exhalus.net
* (c) Jehan : 2012 : jehan at girinstud.io
*
* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/*
* TODO:
* pdb interface - should we bother?
*
* speedups (caching? most bottlenecks seem to be in pixelrgns)
* -> do pixelrgns properly!
*/
#include "config.h"
#include <string.h>
#include <libgimp/gimp.h>
#undef GDK_DISABLE_DEPRECATED
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#define PLUG_IN_PROC "plug-in-animationplay"
#define PLUG_IN_BINARY "animation-play"
#define PLUG_IN_ROLE "gimp-animation-play"
#define DITHERTYPE GDK_RGB_DITHER_NORMAL
typedef enum
{
DISPOSE_COMBINE = 0x00,
DISPOSE_REPLACE = 0x01
} DisposeType;
typedef struct
{
gint duration_index;
DisposeType default_frame_disposal;
guint32 default_frame_duration;
}
AnimationSettings;
/* for shaping */
typedef struct
{
gint x, y;
} CursorOffset;
/* Declare local functions. */
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static void initialize (void);
static void build_dialog (gchar *imagename);
static void refresh_dialog (gchar *imagename);
static void da_size_callback (GtkWidget *widget,
GtkAllocation *allocation, void *data);
static void sda_size_callback (GtkWidget *widget,
GtkAllocation *allocation, void *data);
static void window_destroy (GtkWidget *widget);
static void play_callback (GtkToggleAction *action);
static void step_back_callback (GtkAction *action);
static void step_callback (GtkAction *action);
static void refresh_callback (GtkAction *action);
static void rewind_callback (GtkAction *action);
static void speed_up_callback (GtkAction *action);
static void speed_down_callback (GtkAction *action);
static void speed_reset_callback (GtkAction *action);
static void framecombo_changed (GtkWidget *combo,
gpointer data);
static void speedcombo_changed (GtkWidget *combo,
gpointer data);
static void fpscombo_changed (GtkWidget *combo,
gpointer data);
static void zoomcombo_activated (GtkEntry *combo,
gpointer data);
static void zoomcombo_changed (GtkWidget *combo,
gpointer data);
static gboolean repaint_sda (GtkWidget *darea,
GdkEventExpose *event,
gpointer data);
static gboolean repaint_da (GtkWidget *darea,
GdkEventExpose *event,
gpointer data);
static void init_frames (void);
static void render_frame (gint32 whichframe);
static void show_frame (void);
static void total_alpha_preview (void);
static void update_alpha_preview (void);
static void update_combobox (void);
static gdouble get_duration_factor (gint index);
static gint get_fps (gint index);
static gdouble get_scale (gint index);
static void update_scale (gdouble scale);
/* tag util functions*/
static gint parse_ms_tag (const gchar *str);
static DisposeType parse_disposal_tag (const gchar *str);
static gboolean is_disposal_tag (const gchar *str,
DisposeType *disposal,
gint *taglength);
static gboolean is_ms_tag (const gchar *str,
gint *duration,
gint *taglength);
const GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
/* Global widgets'n'stuff */
static GtkWidget *window = NULL;
static GdkWindow *root_win = NULL;
static GtkUIManager *ui_manager = NULL;
static GtkWidget *progress;
static GtkWidget *speedcombo = NULL;
static GtkWidget *fpscombo = NULL;
static GtkWidget *zoomcombo = NULL;
static GtkWidget *frame_disposal_combo = NULL;
static gint32 image_id;
static guint width = -1,
height = -1;
static gint32 *layers = NULL;
static gint32 total_layers = 0;
static GtkWidget *drawing_area = NULL;
static guchar *drawing_area_data = NULL;
static guint drawing_area_width = -1,
drawing_area_height = -1;
static guchar *preview_alpha1_data = NULL;
static guchar *preview_alpha2_data = NULL;
static GtkWidget *shape_window = NULL;
static GtkWidget *shape_drawing_area = NULL;
static guchar *shape_drawing_area_data = NULL;
static guint shape_drawing_area_width = -1,
shape_drawing_area_height = -1;
static gchar *shape_preview_mask = NULL;
static gint32 total_frames = 0;
static gint32 *frames = NULL;
static guchar *rawframe = NULL;
static guint32 *frame_durations = NULL;
static guint frame_number = 0;
static gboolean playing = FALSE;
static guint timer = 0;
static gboolean detached = FALSE;
static gdouble scale, shape_scale;
/* Default settings. */
static AnimationSettings settings =
{
3,
DISPOSE_COMBINE,
100 /* ms */
};
static gint32 frames_image_id = 0;
MAIN ()
static void
query (void)
{
static const GimpParamDef args[] =
{
{ GIMP_PDB_INT32, "run-mode", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" },
{ GIMP_PDB_IMAGE, "image", "Input image" },
{ GIMP_PDB_DRAWABLE, "drawable", "Input drawable (unused)" }
};
gimp_install_procedure (PLUG_IN_PROC,
N_("Preview a GIMP layer-based animation"),
"",
"Adam D. Moss <adam@gimp.org>",
"Adam D. Moss <adam@gimp.org>",
"1997, 1998...",
N_("_Playback..."),
"RGB*, INDEXED*, GRAY*",
GIMP_PLUGIN,
G_N_ELEMENTS (args), 0,
args, NULL);
gimp_plugin_menu_register (PLUG_IN_PROC, "<Image>/Filters/Animation");
gimp_plugin_icon_register (PLUG_IN_PROC, GIMP_ICON_TYPE_ICON_NAME,
(const guint8 *) "media-playback-start");
}
static void
run (const gchar *name,
gint n_params,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[1];
GimpRunMode run_mode;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
INIT_I18N ();
gegl_init (NULL, NULL);
*nreturn_vals = 1;
*return_vals = values;
run_mode = param[0].data.d_int32;
if (run_mode == GIMP_RUN_NONINTERACTIVE && n_params != 3)
{
status = GIMP_PDB_CALLING_ERROR;
}
if (status == GIMP_PDB_SUCCESS)
{
gimp_get_data (PLUG_IN_PROC, &settings);
image_id = param[1].data.d_image;
initialize ();
gtk_main ();
gimp_set_data (PLUG_IN_PROC, &settings, sizeof (settings));
if (run_mode != GIMP_RUN_NONINTERACTIVE)
gimp_displays_flush ();
}
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
gimp_image_delete (frames_image_id);
gegl_exit ();
}
static void
reshape_from_bitmap (const gchar *bitmap)
{
static gchar *prev_bitmap = NULL;
static guint prev_width = -1;
static guint prev_height = -1;
if ((!prev_bitmap) ||
prev_width != shape_drawing_area_width || prev_height != shape_drawing_area_height ||
(memcmp (prev_bitmap, bitmap, (shape_drawing_area_width * shape_drawing_area_height) / 8 + shape_drawing_area_height)))
{
GdkBitmap *shape_mask;
shape_mask = gdk_bitmap_create_from_data (gtk_widget_get_window (shape_window),
bitmap,
shape_drawing_area_width, shape_drawing_area_height);
gtk_widget_shape_combine_mask (shape_window, shape_mask, 0, 0);
g_object_unref (shape_mask);
if (!prev_bitmap || prev_width != shape_drawing_area_width || prev_height != shape_drawing_area_height)
{
g_free(prev_bitmap);
prev_bitmap = g_malloc ((shape_drawing_area_width * shape_drawing_area_height) / 8 + shape_drawing_area_height);
prev_width = shape_drawing_area_width;
prev_height = shape_drawing_area_height;
}
memcpy (prev_bitmap, bitmap, (shape_drawing_area_width * shape_drawing_area_height) / 8 + shape_drawing_area_height);
}
}
static gboolean
popup_menu (GtkWidget *widget,
GdkEventButton *event)
{
GtkWidget *menu = gtk_ui_manager_get_widget (ui_manager, "/anim-play-popup");
gtk_menu_set_screen (GTK_MENU (menu), gtk_widget_get_screen (widget));
gtk_menu_popup (GTK_MENU (menu),
NULL, NULL, NULL, NULL,
event ? event->button : 0,
event ? event->time : gtk_get_current_event_time ());
return TRUE;
}
static gboolean
button_press (GtkWidget *widget,
GdkEventButton *event)
{
if (gdk_event_triggers_context_menu ((GdkEvent *) event))
return popup_menu (widget, event);
return FALSE;
}
/*
* Update the actual drawing area metrics, which may be different as requested,
* because there is no full control of the WM.
* data is always NULL. */
static void
da_size_callback (GtkWidget *widget,
GtkAllocation *allocation, void *data)
{
if (allocation->width == drawing_area_width && allocation->height == drawing_area_height)
return;
drawing_area_width = allocation->width;
drawing_area_height = allocation->height;
scale = MIN ((gdouble) drawing_area_width / (gdouble) width, (gdouble) drawing_area_height / (gdouble) height);
g_free (drawing_area_data);
drawing_area_data = g_malloc (drawing_area_width * drawing_area_height * 3);
update_alpha_preview ();
if (! detached)
{
/* Update the zoom information. */
GtkEntry *zoomcombo_text_child;
zoomcombo_text_child = GTK_ENTRY (gtk_bin_get_child (GTK_BIN (zoomcombo)));
if (zoomcombo_text_child)
{
char* new_entry_text = g_strdup_printf (_("%.1f %%"), scale * 100.0);
gtk_entry_set_text (zoomcombo_text_child, new_entry_text);
g_free (new_entry_text);
}
/* Update the rawframe. */
g_free (rawframe);
rawframe = g_malloc ((unsigned long) drawing_area_width * drawing_area_height * 4);
/* As we re-allocated the drawn data, let's render it again. */
if (frame_number < total_frames)
render_frame (frame_number);
}
else
{
/* Set "alpha grid" background. */
total_alpha_preview ();
repaint_da(drawing_area, NULL, NULL);
}
}
/*
* Update the actual shape drawing area metrics, which may be different as requested,
* They *should* be the same as the drawing area, but the safe way is to make sure
* and process it separately.
* data is always NULL. */
static void
sda_size_callback (GtkWidget *widget,
GtkAllocation *allocation, void *data)
{
if (allocation->width == shape_drawing_area_width && allocation->height == shape_drawing_area_height)
return;
shape_drawing_area_width = allocation->width;
shape_drawing_area_height = allocation->height;
shape_scale = MIN ((gdouble) shape_drawing_area_width / (gdouble) width, (gdouble) shape_drawing_area_height / (gdouble) height);
g_free (shape_drawing_area_data);
g_free (shape_preview_mask);
shape_drawing_area_data = g_malloc (shape_drawing_area_width * shape_drawing_area_height * 3);
shape_preview_mask = g_malloc ((shape_drawing_area_width * shape_drawing_area_height) / 8 + 1 + shape_drawing_area_height);
if (detached)
{
/* Update the zoom information. */
GtkEntry *zoomcombo_text_child;
zoomcombo_text_child = GTK_ENTRY (gtk_bin_get_child (GTK_BIN (zoomcombo)));
if (zoomcombo_text_child)
{
char* new_entry_text = g_strdup_printf (_("%.1f %%"), shape_scale * 100.0);
gtk_entry_set_text (zoomcombo_text_child, new_entry_text);
g_free (new_entry_text);
}
/* Update the rawframe. */
g_free (rawframe);
rawframe = g_malloc ((unsigned long) shape_drawing_area_width * shape_drawing_area_height * 4);
if (frame_number < total_frames)
render_frame (frame_number);
}
}
static gboolean
shape_pressed (GtkWidget *widget,
GdkEventButton *event)
{
if (button_press (widget, event))
return TRUE;
/* ignore double and triple click */
if (event->type == GDK_BUTTON_PRESS)
{
CursorOffset *p = g_object_get_data (G_OBJECT(widget), "cursor-offset");
if (!p)
return FALSE;
p->x = (gint) event->x;
p->y = (gint) event->y;
gtk_grab_add (widget);
gdk_pointer_grab (gtk_widget_get_window (widget), TRUE,
GDK_BUTTON_RELEASE_MASK |
GDK_BUTTON_MOTION_MASK |
GDK_POINTER_MOTION_HINT_MASK,
NULL, NULL, 0);
gdk_window_raise (gtk_widget_get_window (widget));
}
return FALSE;
}
static gboolean
shape_released (GtkWidget *widget)
{
gtk_grab_remove (widget);
gdk_display_pointer_ungrab (gtk_widget_get_display (widget), 0);
gdk_flush ();
return FALSE;
}
static gboolean
shape_motion (GtkWidget *widget,
GdkEventMotion *event)
{
GdkModifierType mask;
gint xp, yp;
gdk_window_get_pointer (root_win, &xp, &yp, &mask);
/* if a button is still held by the time we process this event... */
if (mask & GDK_BUTTON1_MASK)
{
CursorOffset *p = g_object_get_data (G_OBJECT (widget), "cursor-offset");
if (!p)
return FALSE;
gtk_window_move (GTK_WINDOW (widget), xp - p->x, yp - p->y);
}
else /* the user has released all buttons */
{
shape_released (widget);
}
return FALSE;
}
static gboolean
repaint_da (GtkWidget *darea,
GdkEventExpose *event,
gpointer data)
{
GtkStyle *style = gtk_widget_get_style (darea);
gdk_draw_rgb_image (gtk_widget_get_window (darea),
style->white_gc,
(gint) ((drawing_area_width - scale * width) / 2),
(gint) ((drawing_area_height - scale * height) / 2),
drawing_area_width, drawing_area_height,
(total_frames == 1) ? GDK_RGB_DITHER_MAX : DITHERTYPE,
drawing_area_data, drawing_area_width * 3);
return TRUE;
}
static gboolean
repaint_sda (GtkWidget *darea,
GdkEventExpose *event,
gpointer data)
{
GtkStyle *style = gtk_widget_get_style (darea);
gdk_draw_rgb_image (gtk_widget_get_window (darea),
style->white_gc,
(gint) ((shape_drawing_area_width - shape_scale * width) / 2),
(gint) ((shape_drawing_area_height - shape_scale * height) / 2),
shape_drawing_area_width, shape_drawing_area_height,
(total_frames == 1) ? GDK_RGB_DITHER_MAX : DITHERTYPE,
shape_drawing_area_data, shape_drawing_area_width * 3);
return TRUE;
}
static void
close_callback (GtkAction *action,
gpointer data)
{
gtk_widget_destroy (GTK_WIDGET (data));
}
static void
help_callback (GtkAction *action,
gpointer data)
{
gimp_standard_help_func (PLUG_IN_PROC, data);
}
static void
detach_callback (GtkToggleAction *action)
{
gboolean active = gtk_toggle_action_get_active (action);
if (active == detached)
{
g_warning ("detached state and toggle action got out of sync");
return;
}
detached = active;
if (detached)
{
gint x, y;
/* Create a total-alpha buffer merely for the not-shaped
drawing area to now display. */
gtk_window_set_screen (GTK_WINDOW (shape_window),
gtk_widget_get_screen (drawing_area));
gtk_widget_show (shape_window);
if (!gtk_widget_get_realized (drawing_area))
gtk_widget_realize (drawing_area);
if (!gtk_widget_get_realized (shape_drawing_area))
gtk_widget_realize (shape_drawing_area);
gdk_window_get_origin (gtk_widget_get_window (drawing_area), &x, &y);
gtk_window_move (GTK_WINDOW (shape_window), x + 6, y + 6);
gdk_window_set_back_pixmap (gtk_widget_get_window (shape_drawing_area), NULL, TRUE);
/* Set "alpha grid" background. */
total_alpha_preview ();
repaint_da(drawing_area, NULL, NULL);
}
else
gtk_widget_hide (shape_window);
render_frame (frame_number);
}
static GtkUIManager *
ui_manager_new (GtkWidget *window)
{
static GtkActionEntry actions[] =
{
{ "step-back", "media-skip-backward",
N_("Step _back"), "d", N_("Step back to previous frame"),
G_CALLBACK (step_back_callback) },
{ "step", "media-skip-forward",
N_("_Step"), "f", N_("Step to next frame"),
G_CALLBACK (step_callback) },
{ "rewind", "media-seek-backward",
NULL, NULL, N_("Rewind the animation"),
G_CALLBACK (rewind_callback) },
{ "refresh", GIMP_ICON_VIEW_REFRESH,
NULL, "<control>R", N_("Reload the image"),
G_CALLBACK (refresh_callback) },
{ "help", "help-browser",
NULL, NULL, NULL,
G_CALLBACK (help_callback) },
{ "close", "window-close",
NULL, "<control>W", NULL,
G_CALLBACK (close_callback)
},
{
"quit", "application-quit",
NULL, "<control>Q", NULL,
G_CALLBACK (close_callback)
},
{
"speed-up", NULL,
N_("Faster"), "<control>L", N_("Increase the speed of the animation"),
G_CALLBACK (speed_up_callback)
},
{
"speed-down", NULL,
N_("Slower"), "<control>J", N_("Decrease the speed of the animation"),
G_CALLBACK (speed_down_callback)
},
{
"speed-reset", NULL,
N_("Reset speed"), "<control>K", N_("Reset the speed of the animation"),
G_CALLBACK (speed_reset_callback)
}
};
static GtkToggleActionEntry toggle_actions[] =
{
{ "play", "media-playback-start",
NULL, "space", N_("Start playback"),
G_CALLBACK (play_callback), FALSE },
{ "detach", GIMP_ICON_DETACH,
N_("Detach"), NULL,
N_("Detach the animation from the dialog window"),
G_CALLBACK (detach_callback), FALSE }
};
GtkUIManager *ui_manager = gtk_ui_manager_new ();
GtkActionGroup *group = gtk_action_group_new ("Actions");
GError *error = NULL;
gtk_action_group_set_translation_domain (group, NULL);
gtk_action_group_add_actions (group,
actions,
G_N_ELEMENTS (actions),
window);
gtk_action_group_add_toggle_actions (group,
toggle_actions,
G_N_ELEMENTS (toggle_actions),
NULL);
gtk_window_add_accel_group (GTK_WINDOW (window),
gtk_ui_manager_get_accel_group (ui_manager));
gtk_accel_group_lock (gtk_ui_manager_get_accel_group (ui_manager));
gtk_ui_manager_insert_action_group (ui_manager, group, -1);
g_object_unref (group);
gtk_ui_manager_add_ui_from_string (ui_manager,
"<ui>"
" <toolbar name=\"anim-play-toolbar\">"
" <toolitem action=\"play\" />"
" <toolitem action=\"step-back\" />"
" <toolitem action=\"step\" />"
" <toolitem action=\"rewind\" />"
" <separator />"
" <toolitem action=\"detach\" />"
" <toolitem action=\"refresh\" />"
" <separator name=\"space\" />"
" <toolitem action=\"help\" />"
" </toolbar>"
" <accelerator action=\"close\" />"
" <accelerator action=\"quit\" />"
"</ui>",
-1, &error);
if (error)
{
g_warning ("error parsing ui: %s", error->message);
g_clear_error (&error);
}
gtk_ui_manager_add_ui_from_string (ui_manager,
"<ui>"
" <popup name=\"anim-play-popup\">"
" <menuitem action=\"play\" />"
" <menuitem action=\"step-back\" />"
" <menuitem action=\"step\" />"
" <menuitem action=\"rewind\" />"
" <separator />"
" <menuitem action=\"speed-down\" />"
" <menuitem action=\"speed-up\" />"
" <menuitem action=\"speed-reset\" />"
" <separator />"
" <menuitem action=\"detach\" />"
" <menuitem action=\"refresh\" />"
" <menuitem action=\"close\" />"
" </popup>"
"</ui>",
-1, &error);
if (error)
{
g_warning ("error parsing ui: %s", error->message);
g_clear_error (&error);
}
return ui_manager;
}
static void
refresh_dialog (gchar *imagename)
{
gchar *name;
GdkScreen *screen;
guint screen_width, screen_height;
gint window_width, window_height;
/* Image Name */
name = g_strconcat (_("Animation Playback:"), " ", imagename, NULL);
gtk_window_set_title (GTK_WINDOW (window), name);
g_free (name);
/* Update GUI size. */
screen = gtk_widget_get_screen (window);
screen_height = gdk_screen_get_height (screen);
screen_width = gdk_screen_get_width (screen);
gtk_window_get_size (GTK_WINDOW (window), &window_width, &window_height);
/* if the *window* size is bigger than the screen size,
* diminish the drawing area by as much, then compute the corresponding scale. */
if (window_width + 50 > screen_width || window_height + 50 > screen_height)
{
guint expected_drawing_area_width = MAX (1, width - window_width + screen_width);
guint expected_drawing_area_height = MAX (1, height - window_height + screen_height);
gdouble expected_scale = MIN ((gdouble) expected_drawing_area_width / (gdouble) width,
(gdouble) expected_drawing_area_height / (gdouble) height);
update_scale (expected_scale);
/* There is unfortunately no good way to know the size of the decorations, taskbars, etc.
* So we take a wild guess by making the window slightly smaller to fit into any case. */
gtk_window_set_default_size (GTK_WINDOW (window),
MIN (expected_drawing_area_width + 20, screen_width - 60),
MIN (expected_drawing_area_height + 90, screen_height - 60));
gtk_window_reshow_with_initial_size (GTK_WINDOW (window));
}
}
static void
build_dialog (gchar *imagename)
{
GtkWidget *toolbar;
GtkWidget *frame;
GtkWidget *viewport;
GtkWidget *main_vbox;
GtkWidget *vbox;
GtkWidget *hbox;
GtkWidget *abox;
GtkToolItem *item;
GtkAction *action;
GdkCursor *cursor;
gint index;
gchar *text;
gimp_ui_init (PLUG_IN_BINARY, TRUE);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_role (GTK_WINDOW (window), "animation-playback");
g_signal_connect (window, "destroy",
G_CALLBACK (window_destroy),
NULL);
g_signal_connect (window, "popup-menu",
G_CALLBACK (popup_menu),
NULL);
gimp_help_connect (window, gimp_standard_help_func, PLUG_IN_PROC, NULL);
ui_manager = ui_manager_new (window);
main_vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
gtk_container_add (GTK_CONTAINER (window), main_vbox);
gtk_widget_show (main_vbox);
toolbar = gtk_ui_manager_get_widget (ui_manager, "/anim-play-toolbar");
gtk_box_pack_start (GTK_BOX (main_vbox), toolbar, FALSE, FALSE, 0);
gtk_widget_show (toolbar);
item =
GTK_TOOL_ITEM (gtk_ui_manager_get_widget (ui_manager,
"/anim-play-toolbar/space"));
gtk_separator_tool_item_set_draw (GTK_SEPARATOR_TOOL_ITEM (item), FALSE);
gtk_tool_item_set_expand (item, TRUE);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 2);
gtk_box_pack_start (GTK_BOX (main_vbox), vbox, TRUE, TRUE, 0);
gtk_widget_show (vbox);
/* Alignment for the scrolling window, which can be resized by the user. */
abox = gtk_alignment_new (0.5, 0.5, 1.0, 1.0);
gtk_box_pack_start (GTK_BOX (vbox), abox, TRUE, TRUE, 0);
gtk_widget_show (abox);
frame = gtk_scrolled_window_new (NULL, NULL);
gtk_container_add (GTK_CONTAINER (abox), frame);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (frame),
GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
gtk_widget_show (frame);
viewport = gtk_viewport_new (NULL, NULL);
gtk_container_add (GTK_CONTAINER (frame), viewport);
gtk_widget_show (viewport);
/* I add the drawing area inside an alignment box to prevent it from being resized. */
abox = gtk_alignment_new (0.5, 0.5, 0.0, 0.0);
gtk_container_add (GTK_CONTAINER (viewport), abox);
gtk_widget_show (abox);
/* Build a drawing area, with a default size same as the image */
drawing_area = gtk_drawing_area_new ();
gtk_widget_add_events (drawing_area, GDK_BUTTON_PRESS_MASK);
gtk_container_add (GTK_CONTAINER (abox), drawing_area);
gtk_widget_show (drawing_area);
g_signal_connect (drawing_area, "size-allocate",
G_CALLBACK(da_size_callback),
NULL);
g_signal_connect (drawing_area, "button-press-event",
G_CALLBACK (button_press),
NULL);
/* Lower option bar. */
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
/* Progress bar. */
progress = gtk_progress_bar_new ();
gtk_box_pack_end (GTK_BOX (hbox), progress, TRUE, TRUE, 0);
gtk_widget_show (progress);
/* Zoom */
zoomcombo = gtk_combo_box_text_new_with_entry ();
gtk_box_pack_end (GTK_BOX (hbox), zoomcombo, FALSE, FALSE, 0);
gtk_widget_show (zoomcombo);
for (index = 0; index < 5; index++)
{
/* list is given in "fps" - frames per second */
text = g_strdup_printf (_("%.1f %%"), get_scale (index) * 100.0);
gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (zoomcombo), text);
g_free (text);
}
gtk_combo_box_set_active (GTK_COMBO_BOX (zoomcombo), 2); /* 1.0 by default. */
g_signal_connect (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (zoomcombo))),
"activate",
G_CALLBACK (zoomcombo_activated),
NULL);
g_signal_connect (zoomcombo, "changed",
G_CALLBACK (zoomcombo_changed),
NULL);
gimp_help_set_help_data (zoomcombo, _("Zoom"), NULL);
/* fps combo */
fpscombo = gtk_combo_box_text_new ();
gtk_box_pack_end (GTK_BOX (hbox), fpscombo, FALSE, FALSE, 0);
gtk_widget_show (fpscombo);
for (index = 0; index < 9; index++)
{
/* list is given in "fps" - frames per second */
text = g_strdup_printf (_("%d fps"), get_fps (index));
gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (fpscombo), text);
g_free (text);
if (settings.default_frame_duration == 1000 / get_fps(index))
gtk_combo_box_set_active (GTK_COMBO_BOX (fpscombo), index);
}
g_signal_connect (fpscombo, "changed",
G_CALLBACK (fpscombo_changed),
NULL);
gimp_help_set_help_data (fpscombo, _("Default framerate"), NULL);
/* Speed Combo */
speedcombo = gtk_combo_box_text_new ();
gtk_box_pack_end (GTK_BOX (hbox), speedcombo, FALSE, FALSE, 0);
gtk_widget_show (speedcombo);
for (index = 0; index < 7; index++)
{
text = g_strdup_printf ("%g\303\227", (100 / get_duration_factor (index)) / 100);
gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (speedcombo), text);
g_free (text);
}
gtk_combo_box_set_active (GTK_COMBO_BOX (speedcombo), settings.duration_index);
g_signal_connect (speedcombo, "changed",
G_CALLBACK (speedcombo_changed),
NULL);
gimp_help_set_help_data (speedcombo, _("Playback speed"), NULL);
action = gtk_ui_manager_get_action (ui_manager,
"/anim-play-popup/speed-reset");
gtk_action_set_sensitive (action, FALSE);
/* Set up the frame disposal combo. */
frame_disposal_combo = gtk_combo_box_text_new ();
/* 2 styles of default frame disposals: cumulative layers and one frame per layer. */
text = g_strdup (_("Cumulative layers (combine)"));
gtk_combo_box_text_insert_text (GTK_COMBO_BOX_TEXT (frame_disposal_combo), DISPOSE_COMBINE, text);
g_free (text);
text = g_strdup (_("One frame per layer (replace)"));
gtk_combo_box_text_insert_text (GTK_COMBO_BOX_TEXT (frame_disposal_combo), DISPOSE_REPLACE, text);
g_free (text);
gtk_combo_box_set_active (GTK_COMBO_BOX (frame_disposal_combo), settings.default_frame_disposal);
g_signal_connect (frame_disposal_combo, "changed",
G_CALLBACK (framecombo_changed),
NULL);
gtk_box_pack_end (GTK_BOX (hbox), frame_disposal_combo, FALSE, FALSE, 0);
gtk_widget_show (frame_disposal_combo);
gtk_window_set_resizable (GTK_WINDOW (window), TRUE);
gtk_window_set_default_size (GTK_WINDOW (window), width + 20, height + 90);
gtk_widget_show (window);
/* shape_drawing_area for detached feature. */
shape_window = gtk_window_new (GTK_WINDOW_POPUP);
gtk_window_set_resizable (GTK_WINDOW (shape_window), FALSE);
shape_drawing_area = gtk_drawing_area_new ();
gtk_container_add (GTK_CONTAINER (shape_window), shape_drawing_area);
gtk_widget_show (shape_drawing_area);
gtk_widget_add_events (shape_drawing_area, GDK_BUTTON_PRESS_MASK);
gtk_widget_realize (shape_drawing_area);
gdk_window_set_back_pixmap (gtk_widget_get_window (shape_window), NULL, FALSE);
cursor = gdk_cursor_new_for_display (gtk_widget_get_display (shape_window),
GDK_HAND2);
gdk_window_set_cursor (gtk_widget_get_window (shape_window), cursor);
gdk_cursor_unref (cursor);
g_signal_connect(shape_drawing_area, "size-allocate",
G_CALLBACK(sda_size_callback),
NULL);
g_signal_connect (shape_window, "button-press-event",
G_CALLBACK (shape_pressed),
NULL);
g_signal_connect (shape_window, "button-release-event",
G_CALLBACK (shape_released),
NULL);
g_signal_connect (shape_window, "motion-notify-event",
G_CALLBACK (shape_motion),
NULL);
g_object_set_data (G_OBJECT (shape_window),
"cursor-offset", g_new0 (CursorOffset, 1));
g_signal_connect (drawing_area, "expose-event",
G_CALLBACK (repaint_da),
NULL);
g_signal_connect (shape_drawing_area, "expose-event",
G_CALLBACK (repaint_sda),
NULL);
/* We request a minimum size *after* having connecting the
* size-allocate signal for correct initialization. */
gtk_widget_set_size_request (drawing_area, width, height);
gtk_widget_set_size_request (shape_drawing_area, width, height);
root_win = gdk_get_default_root_window ();
}
static void
init_frames (void)
{
/* Frames are associated to an unused image. */
gint i;
gint32 new_frame, previous_frame, new_layer;
gboolean animated;
GtkAction *action;
gint duration = 0;
DisposeType disposal = settings.default_frame_disposal;
gchar *layer_name;
total_frames = total_layers;
/* Cleanup before re-generation. */
if (frames)
{
gimp_image_delete (frames_image_id);
g_free (frames);
g_free (frame_durations);
}
frames = g_try_malloc0_n (total_frames, sizeof (gint32));
frame_durations = g_try_malloc0_n (total_frames, sizeof (guint32));
if (! frames || ! frame_durations)
{
gimp_message (_("Memory could not be allocated to the frame container."));
gtk_main_quit ();
gimp_quit ();
return;
}
/* We only use RGB images for display because indexed images would somehow
render terrible colors. Layers from other types will be automatically
converted. */
frames_image_id = gimp_image_new (width, height, GIMP_RGB);
/* Save processing time and memory by not saving history and merged frames. */
gimp_image_undo_disable (frames_image_id);
for (i = 0; i < total_frames; i++)
{
layer_name = gimp_item_get_name (layers[total_layers - (i + 1)]);
if (layer_name)
{
duration = parse_ms_tag (layer_name);
disposal = parse_disposal_tag (layer_name);
g_free (layer_name);
}
if (i > 0 && disposal != DISPOSE_REPLACE)
{
previous_frame = gimp_layer_copy (frames[i - 1]);
gimp_image_insert_layer (frames_image_id, previous_frame, 0, -1);
gimp_item_set_visible (previous_frame, TRUE);
}
new_layer = gimp_layer_new_from_drawable (layers[total_layers - (i + 1)], frames_image_id);
gimp_image_insert_layer (frames_image_id, new_layer, 0, -1);
gimp_item_set_visible (new_layer, TRUE);
new_frame = gimp_image_merge_visible_layers (frames_image_id, GIMP_CLIP_TO_IMAGE);
frames[i] = new_frame;
gimp_item_set_visible (new_frame, FALSE);
if (duration <= 0)
duration = settings.default_frame_duration;
frame_durations[i] = (guint32) duration;
}
/* Update the UI. */
animated = total_frames >= 2;
action = gtk_ui_manager_get_action (ui_manager,
"/ui/anim-play-toolbar/play");
gtk_action_set_sensitive (action, animated);
action = gtk_ui_manager_get_action (ui_manager,
"/ui/anim-play-toolbar/step-back");
gtk_action_set_sensitive (action, animated);
action = gtk_ui_manager_get_action (ui_manager,
"/ui/anim-play-toolbar/step");
gtk_action_set_sensitive (action, animated);
action = gtk_ui_manager_get_action (ui_manager,
"/ui/anim-play-toolbar/rewind");
gtk_action_set_sensitive (action, animated);
/* Keep the same frame number, unless it is now invalid. */
if (frame_number >= total_frames)
frame_number = 0;
}
static void
initialize (void)
{
/* Freeing existing data after a refresh. */
g_free (layers);
/* Catch the case when the user has closed the image in the meantime. */
if (! gimp_image_is_valid (image_id))
{
gimp_message (_("Invalid image. Did you close it?"));
gtk_main_quit ();
return;
}
width = gimp_image_width (image_id);
height = gimp_image_height (image_id);
layers = gimp_image_get_layers (image_id, &total_layers);
if (!window)
build_dialog (gimp_image_get_name (image_id));
refresh_dialog (gimp_image_get_name (image_id));
init_frames ();
render_frame (frame_number);
show_frame ();
}
/* Rendering Functions */
static void
render_frame (gint32 whichframe)
{
GeglBuffer *buffer;
gint i, j, k;
guchar *srcptr;
guchar *destptr;
GtkWidget *da;
guint drawing_width, drawing_height;
gdouble drawing_scale;
guchar *preview_data;
g_assert (whichframe < total_frames);
if (detached)
{
da = shape_drawing_area;
preview_data = shape_drawing_area_data;
drawing_width = shape_drawing_area_width;
drawing_height = shape_drawing_area_height;
drawing_scale = shape_scale;
}
else
{
da = drawing_area;
preview_data = drawing_area_data;
drawing_width = drawing_area_width;
drawing_height = drawing_area_height;
drawing_scale = scale;
/* Set "alpha grid" background. */
total_alpha_preview ();
}
buffer = gimp_drawable_get_buffer (frames[whichframe]);
/* Fetch and scale the whole raw new frame */
gegl_buffer_get (buffer, GEGL_RECTANGLE (0, 0, drawing_width, drawing_height),
drawing_scale, babl_format ("R'G'B'A u8"),
rawframe, GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_CLAMP);
/* Number of pixels. */
i = drawing_width * drawing_height;
destptr = preview_data;
srcptr = rawframe;
while (i--)
{
if (! (srcptr[3] & 128))
{
srcptr += 4;
destptr += 3;
continue;
}
*(destptr++) = *(srcptr++);
*(destptr++) = *(srcptr++);
*(destptr++) = *(srcptr++);
srcptr++;
}
/* calculate the shape mask */
if (detached)
{
memset (shape_preview_mask, 0, (drawing_width * drawing_height) / 8 + drawing_height);
srcptr = rawframe + 3;
for (j = 0; j < drawing_height; j++)
{
k = j * ((7 + drawing_width) / 8);
for (i = 0; i < drawing_width; i++)
{
if ((*srcptr) & 128)
shape_preview_mask[k + i/8] |= (1 << (i&7));
srcptr += 4;
}
}
reshape_from_bitmap (shape_preview_mask);
}
/* Display the preview buffer. */
if (gtk_widget_get_realized (da))
gdk_draw_rgb_image (gtk_widget_get_window (da),
(gtk_widget_get_style (da))->white_gc,
(gint) ((drawing_width - drawing_scale * width) / 2),
(gint) ((drawing_height - drawing_scale * height) / 2),
drawing_width, drawing_height,
(total_frames == 1 ?
GDK_RGB_DITHER_MAX : DITHERTYPE),
preview_data, drawing_width * 3);
/* clean up */
g_object_unref (buffer);
}
static void
show_frame (void)
{
gchar *text;
/* update the dialog's progress bar */
gtk_progress_bar_set_fraction (GTK_PROGRESS_BAR (progress),
((gfloat) frame_number /
(gfloat) (total_frames - 0.999)));
text = g_strdup_printf (_("Frame %d of %d"), frame_number + 1, total_frames);
gtk_progress_bar_set_text (GTK_PROGRESS_BAR (progress), text);
g_free (text);
}
static void
update_alpha_preview (void)
{
gint i;
g_free (preview_alpha1_data);
g_free (preview_alpha2_data);
preview_alpha1_data = g_malloc (drawing_area_width * 3);
preview_alpha2_data = g_malloc (drawing_area_width * 3);
for (i = 0; i < drawing_area_width; i++)
{
if (i & 8)
{
preview_alpha1_data[i*3 + 0] =
preview_alpha1_data[i*3 + 1] =
preview_alpha1_data[i*3 + 2] = 102;
preview_alpha2_data[i*3 + 0] =
preview_alpha2_data[i*3 + 1] =
preview_alpha2_data[i*3 + 2] = 154;
}
else
{
preview_alpha1_data[i*3 + 0] =
preview_alpha1_data[i*3 + 1] =
preview_alpha1_data[i*3 + 2] = 154;
preview_alpha2_data[i*3 + 0] =
preview_alpha2_data[i*3 + 1] =
preview_alpha2_data[i*3 + 2] = 102;
}
}
}
static void
total_alpha_preview (void)
{
gint i;
for (i = 0; i < drawing_area_height; i++)
{
if (i & 8)
memcpy (&drawing_area_data[i * 3 * drawing_area_width], preview_alpha1_data, 3 * drawing_area_width);
else
memcpy (&drawing_area_data[i * 3 * drawing_area_width], preview_alpha2_data, 3 * drawing_area_width);
}
}
/* Util. */
static void
remove_timer (void)
{
if (timer)
{
g_source_remove (timer);
timer = 0;
}
}
static void
do_back_step (void)
{
if (frame_number == 0)
frame_number = total_frames - 1;
else
frame_number = (frame_number - 1) % total_frames;
render_frame (frame_number);
}
static void
do_step (void)
{
frame_number = (frame_number + 1) % total_frames;
render_frame (frame_number);
}
/* Callbacks */
static void
window_destroy (GtkWidget *widget)
{
if (playing)
remove_timer ();
if (shape_window)
gtk_widget_destroy (GTK_WIDGET (shape_window));
gtk_main_quit ();
}
static gint
advance_frame_callback (gpointer data)
{
gdouble duration;
remove_timer();
duration = frame_durations[(frame_number + 1) % total_frames];
timer = g_timeout_add (duration * get_duration_factor (settings.duration_index),
advance_frame_callback, NULL);
do_step ();
show_frame ();
return FALSE;
}
static void
play_callback (GtkToggleAction *action)
{
if (playing)
remove_timer ();
playing = gtk_toggle_action_get_active (action);
if (playing)
{
timer = g_timeout_add ((gdouble) frame_durations[frame_number] *
get_duration_factor (settings.duration_index),
advance_frame_callback, NULL);
gtk_action_set_icon_name (GTK_ACTION (action), "media-playback-pause");
}
else
{
gtk_action_set_icon_name (GTK_ACTION (action), "media-playback-start");
}
g_object_set (action,
"tooltip", playing ? _("Stop playback") : _("Start playback"),
NULL);
}
static gdouble
get_duration_factor (gint index)
{
switch (index)
{
case 0:
return 0.125;
case 1:
return 0.25;
case 2:
return 0.5;
case 3:
return 1.0;
case 4:
return 2.0;
case 5:
return 4.0;
case 6:
return 8.0;
default:
return 1.0;
}
}
static gint
get_fps (gint index)
{
switch (index)
{
case 0:
return 10;
case 1:
return 12;
case 2:
return 15;
case 3:
return 24;
case 4:
return 25;
case 5:
return 30;
case 6:
return 50;
case 7:
return 60;
case 8:
return 72;
default:
return 10;
}
}
static gdouble
get_scale (gint index)
{
switch (index)
{
case 0:
return 0.51;
case 1:
return 1.0;
case 2:
return 1.25;
case 3:
return 1.5;
case 4:
return 2.0;
default:
{
/* likely -1 returned if there is no active item from the list.
* Try a text conversion, locale-aware in such a case, assuming people write in percent. */
gchar* active_text = gtk_combo_box_text_get_active_text (GTK_COMBO_BOX_TEXT (zoomcombo));
gdouble zoom = g_strtod (active_text, NULL);
/* Negative scales are inconsistent. And we want to avoid huge scaling. */
if (zoom > 400.0)
zoom = 400.0;
else if (zoom <= 50.0)
/* FIXME: scales under 0.5 are broken. See bug 690265. */
zoom = 50.1;
g_free (active_text);
return zoom / 100.0;
}
}
}
static void
step_back_callback (GtkAction *action)
{
if (playing)
gtk_action_activate (gtk_ui_manager_get_action (ui_manager,
"/anim-play-toolbar/play"));
do_back_step();
show_frame();
}
static void
step_callback (GtkAction *action)
{
if (playing)
gtk_action_activate (gtk_ui_manager_get_action (ui_manager,
"/anim-play-toolbar/play"));
do_step();
show_frame();
}
static void
refresh_callback (GtkAction *action)
{
initialize ();
}
static void
rewind_callback (GtkAction *action)
{
if (playing)
gtk_action_activate (gtk_ui_manager_get_action (ui_manager,
"/anim-play-toolbar/play"));
frame_number = 0;
render_frame (frame_number);
show_frame ();
}
static void
speed_up_callback (GtkAction *action)
{
if (settings.duration_index > 0)
--settings.duration_index;
gtk_action_set_sensitive (action, settings.duration_index > 0);
action = gtk_ui_manager_get_action (ui_manager,
"/anim-play-popup/speed-reset");
gtk_action_set_sensitive (action, settings.duration_index != 3);
action = gtk_ui_manager_get_action (ui_manager,
"/anim-play-popup/speed-down");
gtk_action_set_sensitive (action, TRUE);
update_combobox ();
}
static void
speed_down_callback (GtkAction *action)
{
if (settings.duration_index < 6)
++settings.duration_index;
gtk_action_set_sensitive (action, settings.duration_index < 6);
action = gtk_ui_manager_get_action (ui_manager,
"/anim-play-popup/speed-reset");
gtk_action_set_sensitive (action, settings.duration_index != 3);
action = gtk_ui_manager_get_action (ui_manager,
"/anim-play-popup/speed-up");
gtk_action_set_sensitive (action, TRUE);
update_combobox ();
}
static void
speed_reset_callback (GtkAction *action)
{
settings.duration_index = 3;
gtk_action_set_sensitive (action, FALSE);
action = gtk_ui_manager_get_action (ui_manager,
"/anim-play-popup/speed-down");
gtk_action_set_sensitive (action, TRUE);
action = gtk_ui_manager_get_action (ui_manager,
"/anim-play-popup/speed-up");
gtk_action_set_sensitive (action, TRUE);
update_combobox ();
}
static void
framecombo_changed (GtkWidget *combo, gpointer data)
{
settings.default_frame_disposal = gtk_combo_box_get_active (GTK_COMBO_BOX (combo));
init_frames ();
render_frame (frame_number);
}
static void
speedcombo_changed (GtkWidget *combo, gpointer data)
{
GtkAction * action;
settings.duration_index = gtk_combo_box_get_active (GTK_COMBO_BOX (combo));
action = gtk_ui_manager_get_action (ui_manager,
"/anim-play-popup/speed-reset");
gtk_action_set_sensitive (action, settings.duration_index != 3);
action = gtk_ui_manager_get_action (ui_manager,
"/anim-play-popup/speed-down");
gtk_action_set_sensitive (action, settings.duration_index < 6);
action = gtk_ui_manager_get_action (ui_manager,
"/anim-play-popup/speed-up");
gtk_action_set_sensitive (action, settings.duration_index > 0);
}
static void
update_scale (gdouble scale)
{
guint expected_drawing_area_width;
guint expected_drawing_area_height;
/* FIXME: scales under 0.5 are broken. See bug 690265. */
if (scale <= 0.5)
scale = 0.501;
expected_drawing_area_width = width * scale;
expected_drawing_area_height = height * scale;
gtk_widget_set_size_request (drawing_area, expected_drawing_area_width, expected_drawing_area_height);
gtk_widget_set_size_request (shape_drawing_area, expected_drawing_area_width, expected_drawing_area_height);
/* I force the shape window to a smaller size if we scale down. */
if (detached)
{
gint x, y;
gdk_window_get_origin (gtk_widget_get_window (shape_window), &x, &y);
gtk_window_reshow_with_initial_size (GTK_WINDOW (shape_window));
gtk_window_move (GTK_WINDOW (shape_window), x, y);
}
}
/*
* Callback emitted when the user hits the Enter key of the zoom combo.
*/
static void
zoomcombo_activated (GtkEntry *combo, gpointer data)
{
update_scale (get_scale (-1));
}
/*
* Callback emitted when the user selects a zoom in the dropdown,
* or edits the text entry.
* We don't want to process manual edits because it greedily emits
* signals after each character deleted or added.
*/
static void
zoomcombo_changed (GtkWidget *combo, gpointer data)
{
gint index = gtk_combo_box_get_active (GTK_COMBO_BOX (combo));
/* If no index, user is probably editing by hand. We wait for him to click "Enter". */
if (index != -1)
update_scale (get_scale (index));
}
static void
fpscombo_changed (GtkWidget *combo, gpointer data)
{
settings.default_frame_duration = 1000 / get_fps (gtk_combo_box_get_active (GTK_COMBO_BOX (combo)));
}
static void
update_combobox (void)
{
gtk_combo_box_set_active (GTK_COMBO_BOX (speedcombo), settings.duration_index);
}
/* tag util. */
static gboolean
is_ms_tag (const gchar *str,
gint *duration,
gint *taglength)
{
gint sum = 0;
gint offset;
gint length;
length = strlen(str);
if (str[0] != '(')
return FALSE;
offset = 1;
/* eat any spaces between open-parenthesis and number */
while ((offset < length) && (str[offset] == ' '))
offset++;
if ((offset>=length) || (!g_ascii_isdigit (str[offset])))
return FALSE;
do
{
sum *= 10;
sum += str[offset] - '0';
offset++;
}
while ((offset<length) && (g_ascii_isdigit (str[offset])));
if (length - offset <= 2)
return FALSE;
/* eat any spaces between number and 'ms' */
while ((offset < length) && (str[offset] == ' '))
offset++;
if (length - offset <= 2 ||
g_ascii_toupper (str[offset]) != 'M' ||
g_ascii_toupper (str[offset + 1]) != 'S')
return FALSE;
offset += 2;
/* eat any spaces between 'ms' and close-parenthesis */
while ((offset < length) && (str[offset] == ' '))
offset++;
if ((length - offset < 1) || (str[offset] != ')'))
return FALSE;
offset++;
*duration = sum;
*taglength = offset;
return TRUE;
}
static gint
parse_ms_tag (const gchar *str)
{
gint i;
gint length = strlen (str);
for (i = 0; i < length; i++)
{
gint rtn;
gint dummy;
if (is_ms_tag (&str[i], &rtn, &dummy))
return rtn;
}
return -1;
}
static gboolean
is_disposal_tag (const gchar *str,
DisposeType *disposal,
gint *taglength)
{
if (strlen (str) != 9)
return FALSE;
if (strncmp (str, "(combine)", 9) == 0)
{
*taglength = 9;
*disposal = DISPOSE_COMBINE;
return TRUE;
}
else if (strncmp (str, "(replace)", 9) == 0)
{
*taglength = 9;
*disposal = DISPOSE_REPLACE;
return TRUE;
}
return FALSE;
}
static DisposeType
parse_disposal_tag (const gchar *str)
{
gint i;
gint length = strlen (str);
for (i = 0; i < length; i++)
{
DisposeType rtn;
gint dummy;
if (is_disposal_tag (&str[i], &rtn, &dummy))
return rtn;
}
return settings.default_frame_disposal;
}