diff options
Diffstat (limited to 'fastiv-view.c')
| -rw-r--r-- | fastiv-view.c | 149 |
1 files changed, 134 insertions, 15 deletions
diff --git a/fastiv-view.c b/fastiv-view.c index c8bce86..3b845e4 100644 --- a/fastiv-view.c +++ b/fastiv-view.c @@ -34,10 +34,14 @@ struct _FastivView { cairo_surface_t *image; ///< The loaded image (sequence) cairo_surface_t *page; ///< Current page within image, weak cairo_surface_t *frame; ///< Current frame within page, weak - FastivIoOrientation orientation; ///< Current orientation - bool filter; - bool scale_to_fit; - double scale; + FastivIoOrientation orientation; ///< Current page orientation + bool filter; ///< Smooth scaling toggle + bool scale_to_fit; ///< Image no larger than the allocation + double scale; ///< Scaling factor + + int remaining_loops; ///< Greater than zero if limited + gint64 frame_time; ///< Current frame's start, µs precision + gulong frame_update_connection; ///< GdkFrameClock::update }; G_DEFINE_TYPE(FastivView, fastiv_view, GTK_TYPE_WIDGET) @@ -426,6 +430,123 @@ fastiv_view_scroll_event(GtkWidget *widget, GdkEventScroll *event) } } +static void +stop_animating(FastivView *self) +{ + GdkFrameClock *clock = gtk_widget_get_frame_clock(GTK_WIDGET(self)); + if (!clock || !self->frame_update_connection) + return; + + g_signal_handler_disconnect(clock, self->frame_update_connection); + gdk_frame_clock_end_updating(clock); + + self->frame_time = 0; + self->frame_update_connection = 0; + self->remaining_loops = 0; +} + +static gboolean +advance_frame(FastivView *self) +{ + cairo_surface_t *next = + cairo_surface_get_user_data(self->frame, &fastiv_io_key_frame_next); + if (next) { + self->frame = next; + } else { + if (self->remaining_loops && !--self->remaining_loops) + return FALSE; + + self->frame = self->page; + } + return TRUE; +} + +static gboolean +advance_animation(FastivView *self, GdkFrameClock *clock) +{ + gint64 now = gdk_frame_clock_get_frame_time(clock); + while (true) { + // TODO(p): See if infinite frames can actually happen, and how. + intptr_t duration = (intptr_t) cairo_surface_get_user_data( + self->frame, &fastiv_io_key_frame_duration); + if (duration < 0) + return FALSE; + + // Do not busy loop. GIF timings are given in hundredths of a second. + if (duration == 0) + duration = gdk_frame_timings_get_refresh_interval( + gdk_frame_clock_get_current_timings(clock)) / 1000; + if (duration == 0) + duration = 1; + + gint64 then = self->frame_time + duration * 1000; + if (then > now) + return TRUE; + if (!advance_frame(self)) + return FALSE; + + self->frame_time = then; + gtk_widget_queue_draw(GTK_WIDGET(self)); + } +} + +static void +on_frame_clock_update(GdkFrameClock *clock, gpointer user_data) +{ + FastivView *self = FASTIV_VIEW(user_data); + if (!advance_animation(self, clock)) + stop_animating(self); +} + +static void +start_animating(FastivView *self) +{ + stop_animating(self); + + GdkFrameClock *clock = gtk_widget_get_frame_clock(GTK_WIDGET(self)); + if (!clock || + !cairo_surface_get_user_data(self->page, &fastiv_io_key_frame_next)) + return; + + self->frame_time = gdk_frame_clock_get_frame_time(clock); + self->frame_update_connection = g_signal_connect( + clock, "update", G_CALLBACK(on_frame_clock_update), self); + self->remaining_loops = (uintptr_t) cairo_surface_get_user_data( + self->page, &fastiv_io_key_loops); + + gdk_frame_clock_begin_updating(clock); +} + +static void +switch_page(FastivView *self, cairo_surface_t *page) +{ + GtkWidget *widget = GTK_WIDGET(self); + self->frame = self->page = page; + if ((self->orientation = (uintptr_t) cairo_surface_get_user_data( + self->page, &fastiv_io_key_orientation)) == + FastivIoOrientationUnknown) + self->orientation = FastivIoOrientation0; + + start_animating(self); + gtk_widget_queue_resize(widget); +} + +static void +fastiv_view_map(GtkWidget *widget) +{ + GTK_WIDGET_CLASS(fastiv_view_parent_class)->map(widget); + + // Loading before mapping will fail to obtain a GdkFrameClock. + start_animating(FASTIV_VIEW(widget)); +} + +void +fastiv_view_unmap(GtkWidget *widget) +{ + stop_animating(FASTIV_VIEW(widget)); + GTK_WIDGET_CLASS(fastiv_view_parent_class)->unmap(widget); +} + static gboolean fastiv_view_key_press_event(GtkWidget *widget, GdkEventKey *event) { @@ -467,26 +588,26 @@ fastiv_view_key_press_event(GtkWidget *widget, GdkEventKey *event) cairo_surface_t *page = cairo_surface_get_user_data( self->page, &fastiv_io_key_page_previous); if (page) - self->frame = self->page = page; - gtk_widget_queue_resize(widget); + switch_page(self, page); return TRUE; } case GDK_KEY_bracketright: { cairo_surface_t *page = cairo_surface_get_user_data( self->page, &fastiv_io_key_page_next); if (page) - self->frame = self->page = page; - gtk_widget_queue_resize(widget); + switch_page(self, page); return TRUE; } case GDK_KEY_braceleft: + stop_animating(self); if (!(self->frame = cairo_surface_get_user_data( self->frame, &fastiv_io_key_frame_previous))) self->frame = self->page; gtk_widget_queue_draw(widget); return TRUE; case GDK_KEY_braceright: + stop_animating(self); if (!(self->frame = cairo_surface_get_user_data( self->frame, &fastiv_io_key_frame_next))) self->frame = self->page; @@ -516,6 +637,8 @@ fastiv_view_class_init(FastivViewClass *klass) widget_class->get_preferred_height = fastiv_view_get_preferred_height; widget_class->get_preferred_width = fastiv_view_get_preferred_width; widget_class->size_allocate = fastiv_view_size_allocate; + widget_class->map = fastiv_view_map; + widget_class->unmap = fastiv_view_unmap; widget_class->realize = fastiv_view_realize; widget_class->draw = fastiv_view_draw; widget_class->button_press_event = fastiv_view_button_press_event; @@ -548,13 +671,9 @@ fastiv_view_open(FastivView *self, const gchar *path, GError **error) if (self->image) cairo_surface_destroy(self->image); - self->frame = self->page = self->image = surface; + self->frame = self->page = NULL; + self->image = surface; + switch_page(self, self->image); set_scale_to_fit(self, true); - - // TODO(p): This is actually per-page. - if ((self->orientation = (uintptr_t) cairo_surface_get_user_data( - self->image, &fastiv_io_key_orientation)) == - FastivIoOrientationUnknown) - self->orientation = FastivIoOrientation0; return TRUE; } |