369 lines
8.8 KiB
C
369 lines
8.8 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 2011 Red Hat, Inc.
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*
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* Author: Cosimo Cecchi <cosimoc@gnome.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include "gtkshadowprivate.h"
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#include "gtkstylecontext.h"
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#include "gtkthemingengineprivate.h"
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#include "gtkthemingengine.h"
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#include "gtkpango.h"
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#include "gtkthemingengineprivate.h"
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typedef struct _GtkShadowElement GtkShadowElement;
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struct _GtkShadowElement {
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gint16 hoffset;
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gint16 voffset;
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gint16 radius;
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gint16 spread;
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gboolean inset;
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GdkRGBA color;
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GtkSymbolicColor *symbolic_color;
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};
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static void
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shadow_element_print (GtkShadowElement *element,
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GString *str)
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{
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gchar *color_str;
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if (element->inset)
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g_string_append (str, "inset ");
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g_string_append_printf (str, "%d %d ",
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(gint) element->hoffset,
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(gint) element->voffset);
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if (element->radius != 0)
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g_string_append_printf (str, "%d ", (gint) element->radius);
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if (element->spread != 0)
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g_string_append_printf (str, "%d ", (gint) element->spread);
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if (element->symbolic_color != NULL)
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color_str = gtk_symbolic_color_to_string (element->symbolic_color);
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else
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color_str = gdk_rgba_to_string (&element->color);
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g_string_append (str, color_str);
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g_free (color_str);
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}
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static void
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shadow_element_free (GtkShadowElement *element)
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{
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if (element->symbolic_color != NULL)
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gtk_symbolic_color_unref (element->symbolic_color);
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g_slice_free (GtkShadowElement, element);
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}
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static GtkShadowElement *
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shadow_element_new (gdouble hoffset,
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gdouble voffset,
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gdouble radius,
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gdouble spread,
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gboolean inset,
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GdkRGBA *color,
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GtkSymbolicColor *symbolic_color)
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{
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GtkShadowElement *retval;
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retval = g_slice_new0 (GtkShadowElement);
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retval->hoffset = hoffset;
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retval->voffset = voffset;
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retval->radius = radius;
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retval->spread = spread;
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retval->inset = inset;
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if (symbolic_color != NULL)
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retval->symbolic_color = gtk_symbolic_color_ref (symbolic_color);
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if (color != NULL)
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retval->color = *color;
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return retval;
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}
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/****************
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* GtkShadow *
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****************/
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G_DEFINE_BOXED_TYPE (GtkShadow, _gtk_shadow,
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_gtk_shadow_ref, _gtk_shadow_unref)
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struct _GtkShadow {
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GList *elements;
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guint ref_count;
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gboolean resolved;
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};
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GtkShadow *
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_gtk_shadow_new (void)
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{
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GtkShadow *retval;
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retval = g_slice_new0 (GtkShadow);
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retval->ref_count = 1;
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retval->resolved = FALSE;
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return retval;
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}
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GtkShadow *
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_gtk_shadow_ref (GtkShadow *shadow)
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{
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g_return_val_if_fail (shadow != NULL, NULL);
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shadow->ref_count++;
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return shadow;
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}
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gboolean
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_gtk_shadow_get_resolved (GtkShadow *shadow)
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{
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return shadow->resolved;
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}
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void
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_gtk_shadow_unref (GtkShadow *shadow)
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{
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g_return_if_fail (shadow != NULL);
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shadow->ref_count--;
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if (shadow->ref_count == 0)
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{
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g_list_free_full (shadow->elements,
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(GDestroyNotify) shadow_element_free);
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g_slice_free (GtkShadow, shadow);
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}
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}
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void
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_gtk_shadow_append (GtkShadow *shadow,
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gdouble hoffset,
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gdouble voffset,
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gdouble radius,
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gdouble spread,
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gboolean inset,
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GtkSymbolicColor *color)
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{
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GtkShadowElement *element;
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g_return_if_fail (shadow != NULL);
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g_return_if_fail (color != NULL);
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element = shadow_element_new (hoffset, voffset,
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radius, spread, inset,
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NULL, color);
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shadow->elements = g_list_append (shadow->elements, element);
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}
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GtkShadow *
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_gtk_shadow_resolve (GtkShadow *shadow,
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GtkStyleProperties *props)
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{
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GtkShadow *resolved_shadow;
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GtkShadowElement *element, *resolved_element;
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GdkRGBA color;
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GList *l;
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if (shadow->resolved)
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return _gtk_shadow_ref (shadow);
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resolved_shadow = _gtk_shadow_new ();
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for (l = shadow->elements; l != NULL; l = l->next)
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{
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element = l->data;
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if (!gtk_symbolic_color_resolve (element->symbolic_color,
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props,
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&color))
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{
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_gtk_shadow_unref (resolved_shadow);
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return NULL;
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}
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resolved_element =
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shadow_element_new (element->hoffset, element->voffset,
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element->radius, element->spread, element->inset,
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&color, NULL);
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resolved_shadow->elements =
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g_list_append (resolved_shadow->elements, resolved_element);
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}
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resolved_shadow->resolved = TRUE;
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return resolved_shadow;
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}
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void
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_gtk_shadow_print (GtkShadow *shadow,
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GString *str)
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{
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gint length;
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GList *l;
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length = g_list_length (shadow->elements);
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if (length == 0)
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return;
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shadow_element_print (shadow->elements->data, str);
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if (length == 1)
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return;
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for (l = g_list_next (shadow->elements); l != NULL; l = l->next)
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{
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g_string_append (str, ", ");
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shadow_element_print (l->data, str);
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}
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}
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void
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_gtk_text_shadow_paint_layout (GtkShadow *shadow,
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cairo_t *cr,
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PangoLayout *layout)
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{
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GList *l;
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GtkShadowElement *element;
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if (!cairo_has_current_point (cr))
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cairo_move_to (cr, 0, 0);
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/* render shadows starting from the last one,
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* and the others on top.
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*/
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for (l = g_list_last (shadow->elements); l != NULL; l = l->prev)
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{
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element = l->data;
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cairo_save (cr);
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cairo_rel_move_to (cr, element->hoffset, element->voffset);
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gdk_cairo_set_source_rgba (cr, &element->color);
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_gtk_pango_fill_layout (cr, layout);
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cairo_rel_move_to (cr, -element->hoffset, -element->voffset);
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cairo_restore (cr);
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}
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}
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void
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_gtk_icon_shadow_paint (GtkShadow *shadow,
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cairo_t *cr)
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{
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GList *l;
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GtkShadowElement *element;
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cairo_pattern_t *pattern;
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for (l = g_list_last (shadow->elements); l != NULL; l = l->prev)
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{
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element = l->data;
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cairo_save (cr);
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pattern = cairo_pattern_reference (cairo_get_source (cr));
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gdk_cairo_set_source_rgba (cr, &element->color);
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cairo_translate (cr, element->hoffset, element->voffset);
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cairo_mask (cr, pattern);
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cairo_restore (cr);
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cairo_pattern_destroy (pattern);
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}
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}
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void
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_gtk_icon_shadow_paint_spinner (GtkShadow *shadow,
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cairo_t *cr,
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gdouble radius,
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gdouble progress)
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{
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GtkShadowElement *element;
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GList *l;
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for (l = g_list_last (shadow->elements); l != NULL; l = l->prev)
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{
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element = l->data;
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cairo_save (cr);
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cairo_translate (cr, element->hoffset, element->voffset);
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_gtk_theming_engine_paint_spinner (cr,
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radius, progress,
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&element->color);
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cairo_restore (cr);
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}
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}
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void
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_gtk_box_shadow_render (GtkShadow *shadow,
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cairo_t *cr,
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const GtkRoundedBox *padding_box)
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{
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GtkShadowElement *element;
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GtkRoundedBox box;
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GList *l;
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cairo_save (cr);
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cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
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_gtk_rounded_box_path (padding_box, cr);
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cairo_clip (cr);
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/* render shadows starting from the last one,
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* and the others on top.
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*/
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for (l = g_list_last (shadow->elements); l != NULL; l = l->prev)
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{
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element = l->data;
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if (!element->inset)
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continue;
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box = *padding_box;
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_gtk_rounded_box_move (&box, element->hoffset, element->voffset);
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_gtk_rounded_box_shrink (&box,
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element->spread, element->spread,
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element->spread, element->spread);
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_gtk_rounded_box_path (&box, cr);
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_gtk_rounded_box_clip_path (padding_box, cr);
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gdk_cairo_set_source_rgba (cr, &element->color);
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cairo_fill (cr);
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}
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cairo_restore (cr);
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}
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