* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gtkmodulesprivate.h"
#include "gtkborderimageprivate.h"
#include "gtkpango.h"
-#include "gtkshadowprivate.h"
+#include "gtkcssarrayvalueprivate.h"
+#include "gtkcsscornervalueprivate.h"
+#include "gtkcssenumvalueprivate.h"
+#include "gtkcssnumbervalueprivate.h"
+#include "gtkcssrgbavalueprivate.h"
+#include "gtkcssshadowsvalueprivate.h"
#include "gtkcsstypesprivate.h"
#include "gtkthemingengineprivate.h"
#include "gtkroundedboxprivate.h"
#include "gtkthemingbackgroundprivate.h"
+#include "fallback-c89.c"
+
/**
* SECTION:gtkthemingengine
* @Short_description: Theming renderers
return engine->priv->context;
}
-const GValue *
+GtkCssValue *
_gtk_theming_engine_peek_property (GtkThemingEngine *engine,
- const char *property_name)
+ guint property_id)
{
g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), NULL);
- g_return_val_if_fail (property_name != NULL, NULL);
- return _gtk_style_context_peek_property (engine->priv->context, property_name);
+ return _gtk_style_context_peek_property (engine->priv->context, property_id);
}
double
_gtk_theming_engine_get_number (GtkThemingEngine *engine,
- const char *property_name,
+ guint property_id,
double one_hundred_percent)
{
g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), 0.0);
- g_return_val_if_fail (property_name != NULL, 0.0);
- return _gtk_style_context_get_number (engine->priv->context, property_name, one_hundred_percent);
+ return _gtk_style_context_get_number (engine->priv->context, property_id, one_hundred_percent);
}
/**
* Returns: %TRUE if there is a running transition animation for @state.
*
* Since: 3.0
+ *
+ * Deprecated: 3.6: Always returns %FALSE
**/
gboolean
gtk_theming_engine_state_is_running (GtkThemingEngine *engine,
GtkStateType state,
gdouble *progress)
{
- GtkThemingEnginePrivate *priv;
-
g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), FALSE);
- priv = engine->priv;
- return gtk_style_context_state_is_running (priv->context, state, progress);
+ return FALSE;
}
/**
/**
* gtk_theming_engine_get_border:
- * @engine: a #GtkthemingEngine
+ * @engine: a #GtkThemingEngine
* @state: state to retrieve the border for
* @border: (out): return value for the border settings
*
/**
* gtk_theming_engine_get_padding:
- * @engine: a #GtkthemingEngine
+ * @engine: a #GtkThemingEngine
* @state: state to retrieve the padding for
* @padding: (out): return value for the padding settings
*
gtk_theming_engine_get_color (engine, flags, &fg_color);
gtk_theming_engine_get_background_color (engine, flags, &bg_color);
gtk_theming_engine_get_border (engine, flags, &border);
-
- gtk_theming_engine_get (engine, flags,
- "border-style", &border_style,
- NULL);
+ border_style = _gtk_css_border_style_value_get
+ (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_TOP_STYLE));
border_width = MIN (MIN (border.top, border.bottom),
MIN (border.left, border.right));
}
else
{
- gdouble progress;
- gboolean running;
-
- running = gtk_theming_engine_state_is_running (engine, GTK_STATE_ACTIVE, &progress);
-
- if ((flags & GTK_STATE_FLAG_ACTIVE) || running)
+ if (flags & GTK_STATE_FLAG_ACTIVE)
{
- if (!running)
- progress = 1;
-
cairo_translate (cr,
x + pad, y + pad);
cairo_scale (cr, interior_size / 7., interior_size / 7.);
- cairo_rectangle (cr, 0, 0, 7 * progress, 7);
+ cairo_rectangle (cr, 0, 0, 7, 7);
cairo_clip (cr);
cairo_move_to (cr, 7.0, 0.0);
gtk_theming_engine_get_color (engine, flags, &fg_color);
gtk_theming_engine_get_background_color (engine, flags, &bg_color);
gtk_theming_engine_get_border (engine, flags, &border);
-
- gtk_theming_engine_get (engine, flags,
- "border-style", &border_style,
- NULL);
+ border_style = _gtk_css_border_style_value_get
+ (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_TOP_STYLE));
exterior_size = MIN (width, height);
border_width = MIN (MIN (border.top, border.bottom),
GtkStateFlags state;
GtkBorderStyle border_style[4];
GtkRoundedBox border_box;
- gdouble progress;
- gboolean running;
GtkBorder border;
- GdkRGBA *alloc_colors[4];
GdkRGBA colors[4];
- guint i;
state = gtk_theming_engine_get_state (engine);
_gtk_border_image_render (&border_image, &border, cr, x, y, width, height);
else
{
- gtk_theming_engine_get (engine, state,
- "border-top-style", &border_style[0],
- "border-right-style", &border_style[1],
- "border-bottom-style", &border_style[2],
- "border-left-style", &border_style[3],
- "border-top-color", &alloc_colors[0],
- "border-right-color", &alloc_colors[1],
- "border-bottom-color", &alloc_colors[2],
- "border-left-color", &alloc_colors[3],
- NULL);
-
- running = gtk_theming_engine_state_is_running (engine, GTK_STATE_PRELIGHT, &progress);
-
- if (running)
- {
- GtkStateFlags other_state;
- GdkRGBA *other_colors[4];
+ border_style[0] = _gtk_css_border_style_value_get (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_TOP_STYLE));
+ border_style[1] = _gtk_css_border_style_value_get (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_RIGHT_STYLE));
+ border_style[2] = _gtk_css_border_style_value_get (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_BOTTOM_STYLE));
+ border_style[3] = _gtk_css_border_style_value_get (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_LEFT_STYLE));
- if (state & GTK_STATE_FLAG_PRELIGHT)
- {
- other_state = state & ~(GTK_STATE_FLAG_PRELIGHT);
- progress = 1 - progress;
- }
- else
- other_state = state | GTK_STATE_FLAG_PRELIGHT;
-
- gtk_theming_engine_get (engine, other_state,
- "border-top-color", &other_colors[0],
- "border-right-color", &other_colors[1],
- "border-bottom-color", &other_colors[2],
- "border-left-color", &other_colors[3],
- NULL);
-
- for (i = 0; i < 4; i++)
- {
- colors[i].red = CLAMP (alloc_colors[i]->red + ((other_colors[i]->red - alloc_colors[i]->red) * progress), 0, 1);
- colors[i].green = CLAMP (alloc_colors[i]->green + ((other_colors[i]->green - alloc_colors[i]->green) * progress), 0, 1);
- colors[i].blue = CLAMP (alloc_colors[i]->blue + ((other_colors[i]->blue - alloc_colors[i]->blue) * progress), 0, 1);
- colors[i].alpha = CLAMP (alloc_colors[i]->alpha + ((other_colors[i]->alpha - alloc_colors[i]->alpha) * progress), 0, 1);
- gdk_rgba_free (other_colors[i]);
- gdk_rgba_free (alloc_colors[i]);
- }
- }
- else
- {
- for (i = 0; i < 4; i++)
- {
- colors[i] = *alloc_colors[i];
- gdk_rgba_free (alloc_colors[i]);
- }
- }
+ colors[0] = *_gtk_css_rgba_value_get_rgba (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_TOP_COLOR));
+ colors[1] = *_gtk_css_rgba_value_get_rgba (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_RIGHT_COLOR));
+ colors[2] = *_gtk_css_rgba_value_get_rgba (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_BOTTOM_COLOR));
+ colors[3] = *_gtk_css_rgba_value_get_rgba (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_LEFT_COLOR));
_gtk_rounded_box_init_rect (&border_box, x, y, width, height);
- _gtk_rounded_box_apply_border_radius (&border_box, engine, state, junction);
+ _gtk_rounded_box_apply_border_radius_for_engine (&border_box, engine, junction);
render_border (cr, &border_box, &border, hidden_side, colors, border_style);
}
- border_style[0] = g_value_get_enum (_gtk_theming_engine_peek_property (engine, "outline-style"));
+ border_style[0] = _gtk_css_border_style_value_get (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_OUTLINE_STYLE));
if (border_style[0] != GTK_BORDER_STYLE_NONE)
{
int offset;
border_style[1] = border_style[2] = border_style[3] = border_style[0];
- border.top = g_value_get_int (_gtk_theming_engine_peek_property (engine, "outline-width"));
+ border.top = round (_gtk_css_number_value_get (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_OUTLINE_WIDTH), 100));
border.left = border.right = border.bottom = border.top;
- colors[0] = *(GdkRGBA *) g_value_get_boxed (_gtk_theming_engine_peek_property (engine, "outline-color"));
+ colors[0] = *_gtk_css_rgba_value_get_rgba (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_OUTLINE_COLOR));
colors[3] = colors[2] = colors[1] = colors[0];
- offset = g_value_get_int (_gtk_theming_engine_peek_property (engine, "outline-offset"));
+ offset = _gtk_css_number_value_get (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_OUTLINE_OFFSET), 100);
/* reinit box here - outlines don't have a border radius */
_gtk_rounded_box_init_rect (&border_box, x, y, width, height);
double x_double, y_double;
gdouble angle;
gint line_width;
- gboolean running, is_rtl;
+ gboolean is_rtl;
gdouble progress;
cairo_save (cr);
gtk_theming_engine_get_color (engine, flags, &fg_color);
gtk_theming_engine_get_border_color (engine, flags, &outline_color);
- running = gtk_theming_engine_state_is_running (engine, GTK_STATE_ACTIVE, &progress);
is_rtl = (gtk_theming_engine_get_direction (engine) == GTK_TEXT_DIR_RTL);
line_width = 1;
-
- if (!running)
- progress = (flags & GTK_STATE_FLAG_ACTIVE) ? 1 : 0;
+ progress = (flags & GTK_STATE_FLAG_ACTIVE) ? 1 : 0;
if (!gtk_theming_engine_has_class (engine, GTK_STYLE_CLASS_HORIZONTAL))
{
PangoLayout *layout)
{
GdkRGBA fg_color;
- GtkShadow *text_shadow = NULL;
GtkStateFlags flags;
- gdouble progress;
- gboolean running;
cairo_save (cr);
flags = gtk_theming_engine_get_state (engine);
gtk_theming_engine_get_color (engine, flags, &fg_color);
- running = gtk_theming_engine_state_is_running (engine, GTK_STATE_PRELIGHT, &progress);
-
- if (running)
- {
- GtkStateFlags other_flags;
- GdkRGBA other_fg;
-
- if (flags & GTK_STATE_FLAG_PRELIGHT)
- {
- other_flags = flags & ~(GTK_STATE_FLAG_PRELIGHT);
- progress = 1 - progress;
- }
- else
- other_flags = flags | GTK_STATE_FLAG_PRELIGHT;
-
- gtk_theming_engine_get_color (engine, other_flags, &other_fg);
-
- fg_color.red = CLAMP (fg_color.red + ((other_fg.red - fg_color.red) * progress), 0, 1);
- fg_color.green = CLAMP (fg_color.green + ((other_fg.green - fg_color.green) * progress), 0, 1);
- fg_color.blue = CLAMP (fg_color.blue + ((other_fg.blue - fg_color.blue) * progress), 0, 1);
- fg_color.alpha = CLAMP (fg_color.alpha + ((other_fg.alpha - fg_color.alpha) * progress), 0, 1);
- }
-
- gtk_theming_engine_get (engine, flags,
- "text-shadow", &text_shadow,
- NULL);
-
prepare_context_for_layout (cr, x, y, layout);
- if (text_shadow != NULL)
- {
- _gtk_text_shadow_paint_layout (text_shadow, cr, layout);
- _gtk_shadow_unref (text_shadow);
- }
+ _gtk_css_shadows_value_paint_layout (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_TEXT_SHADOW),
+ cr, layout);
gdk_cairo_set_source_rgba (cr, &fg_color);
pango_cairo_show_layout (cr, layout);
gdouble height,
GtkOrientation orientation)
{
- const GtkWidgetPath *path;
- gint thickness;
-
- path = gtk_theming_engine_get_path (engine);
-
gtk_theming_engine_render_background (engine, cr, x, y, width, height);
gtk_theming_engine_render_frame (engine, cr, x, y, width, height);
-
- /* FIXME: thickness */
- thickness = 2;
-
- if (gtk_widget_path_is_type (path, GTK_TYPE_SCALE))
- {
- if (orientation == GTK_ORIENTATION_VERTICAL)
- gtk_theming_engine_render_line (engine, cr,
- x + thickness,
- y + (gint) height / 2,
- x + width - thickness - 1,
- y + (gint) height / 2);
- else
- gtk_theming_engine_render_line (engine, cr,
- x + (gint) width / 2,
- y + thickness,
- x + (gint) width / 2,
- y + height - thickness - 1);
- }
}
static void
GtkJunctionSides junction;
GtkStateFlags state;
gint border_width;
- GtkCssBorderCornerRadius *top_left_radius, *top_right_radius;
- GtkCssBorderCornerRadius *bottom_left_radius, *bottom_right_radius;
+ GtkCssValue *corner[4];
gdouble x0, y0, x1, y1, xc, yc, wc, hc;
GtkBorder border;
junction = gtk_theming_engine_get_junction_sides (engine);
gtk_theming_engine_get_border (engine, state, &border);
- gtk_theming_engine_get (engine, state,
- "border-top-left-radius", &top_left_radius,
- "border-top-right-radius", &top_right_radius,
- "border-bottom-right-radius", &bottom_right_radius,
- "border-bottom-left-radius", &bottom_left_radius,
- NULL);
+ corner[GTK_CSS_TOP_LEFT] = _gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_TOP_LEFT_RADIUS);
+ corner[GTK_CSS_TOP_RIGHT] = _gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_TOP_RIGHT_RADIUS);
+ corner[GTK_CSS_BOTTOM_LEFT] = _gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_BOTTOM_LEFT_RADIUS);
+ corner[GTK_CSS_BOTTOM_RIGHT] = _gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_BOTTOM_RIGHT_RADIUS);
border_width = MIN (MIN (border.top, border.bottom),
MIN (border.left, border.right));
wc = MAX (xy1_gap - xy0_gap - 2 * border_width, 0);
hc = border_width;
- if (xy0_gap < _gtk_css_number_get (&top_left_radius->horizontal, width))
+ if (xy0_gap < _gtk_css_corner_value_get_x (corner[GTK_CSS_TOP_LEFT], width))
junction |= GTK_JUNCTION_CORNER_TOPLEFT;
- if (xy1_gap > width - _gtk_css_number_get (&top_right_radius->horizontal, width))
+ if (xy1_gap > width - _gtk_css_corner_value_get_x (corner[GTK_CSS_TOP_RIGHT], width))
junction |= GTK_JUNCTION_CORNER_TOPRIGHT;
break;
case GTK_POS_BOTTOM:
wc = MAX (xy1_gap - xy0_gap - 2 * border_width, 0);
hc = border_width;
- if (xy0_gap < _gtk_css_number_get (&bottom_left_radius->horizontal, width))
+ if (xy0_gap < _gtk_css_corner_value_get_x (corner[GTK_CSS_BOTTOM_LEFT], width))
junction |= GTK_JUNCTION_CORNER_BOTTOMLEFT;
- if (xy1_gap > width - _gtk_css_number_get (&bottom_right_radius->horizontal, width))
+ if (xy1_gap > width - _gtk_css_corner_value_get_x (corner[GTK_CSS_BOTTOM_RIGHT], width))
junction |= GTK_JUNCTION_CORNER_BOTTOMRIGHT;
break;
wc = border_width;
hc = MAX (xy1_gap - xy0_gap - 2 * border_width, 0);
- if (xy0_gap < _gtk_css_number_get (&top_left_radius->vertical, height))
+ if (xy0_gap < _gtk_css_corner_value_get_y (corner[GTK_CSS_TOP_LEFT], height))
junction |= GTK_JUNCTION_CORNER_TOPLEFT;
- if (xy1_gap > height - _gtk_css_number_get (&bottom_left_radius->vertical, height))
+ if (xy1_gap > height - _gtk_css_corner_value_get_y (corner[GTK_CSS_BOTTOM_LEFT], height))
junction |= GTK_JUNCTION_CORNER_BOTTOMLEFT;
break;
wc = border_width;
hc = MAX (xy1_gap - xy0_gap - 2 * border_width, 0);
- if (xy0_gap < _gtk_css_number_get (&top_right_radius->vertical, height))
+ if (xy0_gap < _gtk_css_corner_value_get_y (corner[GTK_CSS_TOP_RIGHT], height))
junction |= GTK_JUNCTION_CORNER_TOPRIGHT;
- if (xy1_gap > height - _gtk_css_number_get (&bottom_right_radius->vertical, height))
+ if (xy1_gap > height - _gtk_css_corner_value_get_y (corner[GTK_CSS_BOTTOM_RIGHT], height))
junction |= GTK_JUNCTION_CORNER_BOTTOMRIGHT;
break;
0, junction);
cairo_restore (cr);
-
- g_free (top_left_radius);
- g_free (top_right_radius);
- g_free (bottom_right_radius);
- g_free (bottom_left_radius);
}
static void
GtkJunctionSides junction = 0;
guint hidden_side = 0;
- cairo_save (cr);
-
switch (gap_side)
{
case GTK_POS_LEFT:
junction = GTK_JUNCTION_LEFT;
hidden_side = (1 << GTK_CSS_LEFT);
-
- cairo_translate (cr, x + width, y);
- cairo_rotate (cr, G_PI / 2);
break;
case GTK_POS_RIGHT:
junction = GTK_JUNCTION_RIGHT;
hidden_side = (1 << GTK_CSS_RIGHT);
-
- cairo_translate (cr, x, y + height);
- cairo_rotate (cr, - G_PI / 2);
break;
case GTK_POS_TOP:
junction = GTK_JUNCTION_TOP;
hidden_side = (1 << GTK_CSS_TOP);
-
- cairo_translate (cr, x + width, y + height);
- cairo_rotate (cr, G_PI);
break;
case GTK_POS_BOTTOM:
junction = GTK_JUNCTION_BOTTOM;
hidden_side = (1 << GTK_CSS_BOTTOM);
-
- cairo_translate (cr, x, y);
break;
}
- if (gap_side == GTK_POS_TOP ||
- gap_side == GTK_POS_BOTTOM)
- _gtk_theming_background_init (&bg, engine,
- 0, 0,
- width, height,
- GTK_JUNCTION_BOTTOM);
- else
- _gtk_theming_background_init (&bg, engine,
- 0, 0,
- height, width,
- GTK_JUNCTION_BOTTOM);
-
+ _gtk_theming_background_init (&bg, engine,
+ x, y,
+ width, height,
+ junction);
_gtk_theming_background_render (&bg, cr);
- cairo_restore (cr);
-
- cairo_save (cr);
-
render_frame_internal (engine, cr,
x, y, width, height,
hidden_side, junction);
-
- cairo_restore (cr);
}
static void
GtkJunctionSides sides;
GtkThemingBackground bg;
gint xx, yy;
+ gboolean has_image;
cairo_save (cr);
flags = gtk_theming_engine_get_state (engine);
color_shade (&bg_color, 1.3, &lighter);
_gtk_theming_background_init (&bg, engine, x, y, width, height, sides);
+ has_image = _gtk_theming_background_has_background_image (&bg);
_gtk_theming_background_render (&bg, cr);
+ gtk_theming_engine_render_frame (engine, cr, x, y, width, height);
+
if (gtk_theming_engine_has_class (engine, GTK_STYLE_CLASS_GRIP))
{
/* reduce confusing values to a meaningful state */
}
else if (gtk_theming_engine_has_class (engine, GTK_STYLE_CLASS_PANE_SEPARATOR))
{
- if (width > height)
- for (xx = x + width / 2 - 15; xx <= x + width / 2 + 15; xx += 5)
- render_dot (cr, &lighter, &darker, xx, y + height / 2 - 1, 3);
- else
- for (yy = y + height / 2 - 15; yy <= y + height / 2 + 15; yy += 5)
- render_dot (cr, &lighter, &darker, x + width / 2 - 1, yy, 3);
+ if (!has_image)
+ {
+ if (width > height)
+ for (xx = x + width / 2 - 15; xx <= x + width / 2 + 15; xx += 5)
+ render_dot (cr, &lighter, &darker, xx, y + height / 2 - 1, 3);
+ else
+ for (yy = y + height / 2 - 15; yy <= y + height / 2 + 15; yy += 5)
+ render_dot (cr, &lighter, &darker, x + width / 2 - 1, yy, 3);
+ }
}
else
{
}
void
-_gtk_theming_engine_paint_spinner (cairo_t *cr,
- gdouble radius,
- gdouble progress,
- GdkRGBA *color)
+_gtk_theming_engine_paint_spinner (cairo_t *cr,
+ gdouble radius,
+ gdouble progress,
+ const GdkRGBA *color)
{
guint num_steps, step;
gdouble half;
gdouble height)
{
GtkStateFlags state;
- GtkShadow *shadow;
GdkRGBA color;
- gdouble progress;
gdouble radius;
state = gtk_theming_engine_get_state (engine);
-
- if (!gtk_theming_engine_state_is_running (engine, GTK_STATE_ACTIVE, &progress))
- progress = -1;
-
radius = MIN (width / 2, height / 2);
gtk_theming_engine_get_color (engine, state, &color);
- gtk_theming_engine_get (engine, state,
- "icon-shadow", &shadow,
- NULL);
cairo_save (cr);
cairo_translate (cr, x + width / 2, y + height / 2);
- if (shadow != NULL)
- {
- _gtk_icon_shadow_paint_spinner (shadow, cr,
- radius,
- progress);
- _gtk_shadow_unref (shadow);
- }
+ _gtk_css_shadows_value_paint_spinner (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_ICON_SHADOW),
+ cr,
+ radius,
+ -1);
_gtk_theming_engine_paint_spinner (cr,
radius,
- progress,
+ -1,
&color);
cairo_restore (cr);
gdouble x,
gdouble y)
{
- GtkStateFlags state;
- GtkShadow *icon_shadow;
-
- state = gtk_theming_engine_get_state (engine);
-
cairo_save (cr);
gdk_cairo_set_source_pixbuf (cr, pixbuf, x, y);
- gtk_theming_engine_get (engine, state,
- "icon-shadow", &icon_shadow,
- NULL);
-
- if (icon_shadow != NULL)
- {
- _gtk_icon_shadow_paint (icon_shadow, cr);
- _gtk_shadow_unref (icon_shadow);
- }
+ _gtk_css_shadows_value_paint_icon (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_ICON_SHADOW), cr);
cairo_paint (cr);
projects / ~andy / gtk / blobdiff