462 lines
18 KiB
C
462 lines
18 KiB
C
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/* GTK - The GIMP Toolkit
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* Copyright (C) 2011 Benjamin Otte <otte@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, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include "gtkroundedboxprivate.h"
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#include "gtkcsscornervalueprivate.h"
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#include "gtkcssnumbervalueprivate.h"
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#include "gtkcsstypesprivate.h"
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#include "gtkprivate.h"
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#include <string.h>
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typedef struct {
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double angle1;
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double angle2;
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gboolean negative;
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} Arc;
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static inline guint
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mem_hash (gconstpointer v, int len)
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{
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const signed char *p;
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const signed char *end;
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guint32 h = 5381;
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p = v;
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end = p + len;
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for (; p < end; p++)
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h = (h << 5) + h + *p;
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return h;
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}
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static guint
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arc_path_hash (Arc *arc)
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{
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return mem_hash ((gconstpointer)arc, sizeof (Arc));
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}
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static gboolean
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arc_path_equal (Arc *arc1,
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Arc *arc2)
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{
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return arc1->angle1 == arc2->angle1 &&
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arc1->angle2 == arc2->angle2 &&
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arc1->negative == arc2->negative;
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}
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/* We need the path to start with a line-to */
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static cairo_path_t *
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fixup_path (cairo_path_t *path)
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{
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cairo_path_data_t *data;
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data = &path->data[0];
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if (data->header.type == CAIRO_PATH_MOVE_TO)
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data->header.type = CAIRO_PATH_LINE_TO;
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return path;
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}
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static void
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append_arc (cairo_t *cr, double angle1, double angle2, gboolean negative)
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{
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static GHashTable *arc_path_cache;
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Arc key;
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cairo_path_t *arc;
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memset (&key, 0, sizeof (Arc));
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key.angle1 = angle1;
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key.angle2 = angle2;
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key.negative = negative;
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if (arc_path_cache == NULL)
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arc_path_cache = g_hash_table_new_full ((GHashFunc)arc_path_hash,
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(GEqualFunc)arc_path_equal,
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g_free, (GDestroyNotify)cairo_path_destroy);
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arc = g_hash_table_lookup (arc_path_cache, &key);
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if (arc == NULL)
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{
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cairo_surface_t *surface;
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cairo_t *tmp;
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surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 1, 1);
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tmp = cairo_create (surface);
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if (negative)
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cairo_arc_negative (tmp, 0.0, 0.0, 1.0, angle1, angle2);
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else
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cairo_arc (tmp, 0.0, 0.0, 1.0, angle1, angle2);
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arc = fixup_path (cairo_copy_path (tmp));
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g_hash_table_insert (arc_path_cache, g_memdup2 (&key, sizeof (key)), arc);
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cairo_destroy (tmp);
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cairo_surface_destroy (surface);
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}
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cairo_append_path (cr, arc);
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}
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static void
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_cairo_ellipsis (cairo_t *cr,
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double xc, double yc,
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double xradius, double yradius,
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double angle1, double angle2)
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{
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cairo_matrix_t save;
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if (xradius <= 0.0 || yradius <= 0.0)
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{
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cairo_line_to (cr, xc, yc);
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return;
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}
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cairo_get_matrix (cr, &save);
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cairo_translate (cr, xc, yc);
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cairo_scale (cr, xradius, yradius);
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append_arc (cr, angle1, angle2, FALSE);
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cairo_set_matrix (cr, &save);
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}
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static void
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_cairo_ellipsis_negative (cairo_t *cr,
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double xc, double yc,
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double xradius, double yradius,
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double angle1, double angle2)
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{
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cairo_matrix_t save;
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if (xradius <= 0.0 || yradius <= 0.0)
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{
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cairo_line_to (cr, xc, yc);
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return;
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}
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cairo_get_matrix (cr, &save);
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cairo_translate (cr, xc, yc);
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cairo_scale (cr, xradius, yradius);
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append_arc (cr, angle1, angle2, TRUE);
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cairo_set_matrix (cr, &save);
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}
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double
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_gtk_rounded_box_guess_length (const GskRoundedRect *box,
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GtkCssSide side)
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{
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double length;
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GtkCssSide before, after;
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before = side;
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after = (side + 1) % 4;
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if (side & 1)
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length = box->bounds.size.height
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- box->corner[before].height
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- box->corner[after].height;
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else
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length = box->bounds.size.width
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- box->corner[before].width
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- box->corner[after].width;
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length += G_PI * 0.125 * (box->corner[before].width
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+ box->corner[before].height
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+ box->corner[after].width
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+ box->corner[after].height);
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return length;
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}
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void
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_gtk_rounded_box_path_side (const GskRoundedRect *box,
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cairo_t *cr,
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GtkCssSide side)
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{
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switch (side)
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{
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case GTK_CSS_TOP:
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_cairo_ellipsis (cr,
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box->bounds.origin.x + box->corner[GSK_CORNER_TOP_LEFT].width,
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box->bounds.origin.y + box->corner[GSK_CORNER_TOP_LEFT].height,
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box->corner[GSK_CORNER_TOP_LEFT].width,
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box->corner[GSK_CORNER_TOP_LEFT].height,
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5 * G_PI_4, 3 * G_PI_2);
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_cairo_ellipsis (cr,
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box->bounds.origin.x + box->bounds.size.width - box->corner[GSK_CORNER_TOP_RIGHT].width,
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box->bounds.origin.y + box->corner[GSK_CORNER_TOP_RIGHT].height,
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box->corner[GSK_CORNER_TOP_RIGHT].width,
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box->corner[GSK_CORNER_TOP_RIGHT].height,
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- G_PI_2, -G_PI_4);
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break;
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case GTK_CSS_RIGHT:
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_cairo_ellipsis (cr,
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box->bounds.origin.x + box->bounds.size.width - box->corner[GSK_CORNER_TOP_RIGHT].width,
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box->bounds.origin.y + box->corner[GSK_CORNER_TOP_RIGHT].height,
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box->corner[GSK_CORNER_TOP_RIGHT].width,
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box->corner[GSK_CORNER_TOP_RIGHT].height,
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- G_PI_4, 0);
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_cairo_ellipsis (cr,
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box->bounds.origin.x + box->bounds.size.width - box->corner[GSK_CORNER_BOTTOM_RIGHT].width,
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box->bounds.origin.y + box->bounds.size.height - box->corner[GSK_CORNER_BOTTOM_RIGHT].height,
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box->corner[GSK_CORNER_BOTTOM_RIGHT].width,
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box->corner[GSK_CORNER_BOTTOM_RIGHT].height,
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0, G_PI_4);
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break;
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case GTK_CSS_BOTTOM:
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_cairo_ellipsis (cr,
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box->bounds.origin.x + box->bounds.size.width - box->corner[GSK_CORNER_BOTTOM_RIGHT].width,
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box->bounds.origin.y + box->bounds.size.height - box->corner[GSK_CORNER_BOTTOM_RIGHT].height,
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box->corner[GSK_CORNER_BOTTOM_RIGHT].width,
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box->corner[GSK_CORNER_BOTTOM_RIGHT].height,
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G_PI_4, G_PI_2);
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_cairo_ellipsis (cr,
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box->bounds.origin.x + box->corner[GSK_CORNER_BOTTOM_LEFT].width,
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box->bounds.origin.y + box->bounds.size.height - box->corner[GSK_CORNER_BOTTOM_LEFT].height,
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box->corner[GSK_CORNER_BOTTOM_LEFT].width,
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box->corner[GSK_CORNER_BOTTOM_LEFT].height,
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G_PI_2, 3 * G_PI_4);
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break;
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case GTK_CSS_LEFT:
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_cairo_ellipsis (cr,
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box->bounds.origin.x + box->corner[GSK_CORNER_BOTTOM_LEFT].width,
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box->bounds.origin.y + box->bounds.size.height - box->corner[GSK_CORNER_BOTTOM_LEFT].height,
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box->corner[GSK_CORNER_BOTTOM_LEFT].width,
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box->corner[GSK_CORNER_BOTTOM_LEFT].height,
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3 * G_PI_4, G_PI);
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_cairo_ellipsis (cr,
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box->bounds.origin.x + box->corner[GSK_CORNER_TOP_LEFT].width,
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box->bounds.origin.y + box->corner[GSK_CORNER_TOP_LEFT].height,
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box->corner[GSK_CORNER_TOP_LEFT].width,
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box->corner[GSK_CORNER_TOP_LEFT].height,
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G_PI, 5 * G_PI_4);
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break;
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default:
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g_assert_not_reached ();
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break;
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}
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}
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void
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_gtk_rounded_box_path_top (const GskRoundedRect *outer,
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const GskRoundedRect *inner,
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cairo_t *cr)
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{
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double start_angle, middle_angle, end_angle;
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if (outer->bounds.origin.y == inner->bounds.origin.y)
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return;
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if (outer->bounds.origin.x == inner->bounds.origin.x)
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start_angle = G_PI;
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else
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start_angle = 5 * G_PI_4;
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middle_angle = 3 * G_PI_2;
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if (outer->bounds.origin.x + outer->bounds.size.width == inner->bounds.origin.x + inner->bounds.size.width)
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end_angle = 0;
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else
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end_angle = 7 * G_PI_4;
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cairo_new_sub_path (cr);
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_cairo_ellipsis (cr,
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outer->bounds.origin.x + outer->corner[GSK_CORNER_TOP_LEFT].width,
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outer->bounds.origin.y + outer->corner[GSK_CORNER_TOP_LEFT].height,
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outer->corner[GSK_CORNER_TOP_LEFT].width,
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outer->corner[GSK_CORNER_TOP_LEFT].height,
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start_angle, middle_angle);
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_cairo_ellipsis (cr,
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outer->bounds.origin.x + outer->bounds.size.width - outer->corner[GSK_CORNER_TOP_RIGHT].width,
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outer->bounds.origin.y + outer->corner[GSK_CORNER_TOP_RIGHT].height,
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outer->corner[GSK_CORNER_TOP_RIGHT].width,
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outer->corner[GSK_CORNER_TOP_RIGHT].height,
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middle_angle, end_angle);
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_cairo_ellipsis_negative (cr,
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inner->bounds.origin.x + inner->bounds.size.width - inner->corner[GSK_CORNER_TOP_RIGHT].width,
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inner->bounds.origin.y + inner->corner[GSK_CORNER_TOP_RIGHT].height,
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inner->corner[GSK_CORNER_TOP_RIGHT].width,
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inner->corner[GSK_CORNER_TOP_RIGHT].height,
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end_angle, middle_angle);
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_cairo_ellipsis_negative (cr,
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inner->bounds.origin.x + inner->corner[GSK_CORNER_TOP_LEFT].width,
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inner->bounds.origin.y + inner->corner[GSK_CORNER_TOP_LEFT].height,
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inner->corner[GSK_CORNER_TOP_LEFT].width,
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inner->corner[GSK_CORNER_TOP_LEFT].height,
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middle_angle, start_angle);
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cairo_close_path (cr);
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}
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void
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_gtk_rounded_box_path_right (const GskRoundedRect *outer,
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const GskRoundedRect *inner,
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cairo_t *cr)
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{
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double start_angle, middle_angle, end_angle;
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if (outer->bounds.origin.x + outer->bounds.size.width == inner->bounds.origin.x + inner->bounds.size.width)
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return;
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if (outer->bounds.origin.y == inner->bounds.origin.y)
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start_angle = 3 * G_PI_2;
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else
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start_angle = 7 * G_PI_4;
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middle_angle = 0;
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if (outer->bounds.origin.y + outer->bounds.size.height == inner->bounds.origin.y + inner->bounds.size.height)
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end_angle = G_PI_2;
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else
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end_angle = G_PI_4;
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cairo_new_sub_path (cr);
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_cairo_ellipsis (cr,
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outer->bounds.origin.x + outer->bounds.size.width - outer->corner[GSK_CORNER_TOP_RIGHT].width,
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outer->bounds.origin.y + outer->corner[GSK_CORNER_TOP_RIGHT].height,
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outer->corner[GSK_CORNER_TOP_RIGHT].width,
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outer->corner[GSK_CORNER_TOP_RIGHT].height,
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start_angle, middle_angle);
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_cairo_ellipsis (cr,
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outer->bounds.origin.x + outer->bounds.size.width - outer->corner[GSK_CORNER_BOTTOM_RIGHT].width,
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outer->bounds.origin.y + outer->bounds.size.height - outer->corner[GSK_CORNER_BOTTOM_RIGHT].height,
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outer->corner[GSK_CORNER_BOTTOM_RIGHT].width,
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outer->corner[GSK_CORNER_BOTTOM_RIGHT].height,
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middle_angle, end_angle);
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_cairo_ellipsis_negative (cr,
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inner->bounds.origin.x + inner->bounds.size.width - inner->corner[GSK_CORNER_BOTTOM_RIGHT].width,
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inner->bounds.origin.y + inner->bounds.size.height - inner->corner[GSK_CORNER_BOTTOM_RIGHT].height,
|
||
|
|
inner->corner[GSK_CORNER_BOTTOM_RIGHT].width,
|
||
|
|
inner->corner[GSK_CORNER_BOTTOM_RIGHT].height,
|
||
|
|
end_angle, middle_angle);
|
||
|
|
_cairo_ellipsis_negative (cr,
|
||
|
|
inner->bounds.origin.x + inner->bounds.size.width - inner->corner[GSK_CORNER_TOP_RIGHT].width,
|
||
|
|
inner->bounds.origin.y + inner->corner[GSK_CORNER_TOP_RIGHT].height,
|
||
|
|
inner->corner[GSK_CORNER_TOP_RIGHT].width,
|
||
|
|
inner->corner[GSK_CORNER_TOP_RIGHT].height,
|
||
|
|
middle_angle, start_angle);
|
||
|
|
|
||
|
|
cairo_close_path (cr);
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
_gtk_rounded_box_path_bottom (const GskRoundedRect *outer,
|
||
|
|
const GskRoundedRect *inner,
|
||
|
|
cairo_t *cr)
|
||
|
|
{
|
||
|
|
double start_angle, middle_angle, end_angle;
|
||
|
|
|
||
|
|
if (outer->bounds.origin.y + outer->bounds.size.height == inner->bounds.origin.y + inner->bounds.size.height)
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (outer->bounds.origin.x + outer->bounds.size.width == inner->bounds.origin.x + inner->bounds.size.width)
|
||
|
|
start_angle = 0;
|
||
|
|
else
|
||
|
|
start_angle = G_PI_4;
|
||
|
|
middle_angle = G_PI_2;
|
||
|
|
if (outer->bounds.origin.x == inner->bounds.origin.x)
|
||
|
|
end_angle = G_PI;
|
||
|
|
else
|
||
|
|
end_angle = 3 * G_PI_4;
|
||
|
|
|
||
|
|
cairo_new_sub_path (cr);
|
||
|
|
|
||
|
|
_cairo_ellipsis (cr,
|
||
|
|
outer->bounds.origin.x + outer->bounds.size.width - outer->corner[GSK_CORNER_BOTTOM_RIGHT].width,
|
||
|
|
outer->bounds.origin.y + outer->bounds.size.height - outer->corner[GSK_CORNER_BOTTOM_RIGHT].height,
|
||
|
|
outer->corner[GSK_CORNER_BOTTOM_RIGHT].width,
|
||
|
|
outer->corner[GSK_CORNER_BOTTOM_RIGHT].height,
|
||
|
|
start_angle, middle_angle);
|
||
|
|
_cairo_ellipsis (cr,
|
||
|
|
outer->bounds.origin.x + outer->corner[GSK_CORNER_BOTTOM_LEFT].width,
|
||
|
|
outer->bounds.origin.y + outer->bounds.size.height - outer->corner[GSK_CORNER_BOTTOM_LEFT].height,
|
||
|
|
outer->corner[GSK_CORNER_BOTTOM_LEFT].width,
|
||
|
|
outer->corner[GSK_CORNER_BOTTOM_LEFT].height,
|
||
|
|
middle_angle, end_angle);
|
||
|
|
|
||
|
|
_cairo_ellipsis_negative (cr,
|
||
|
|
inner->bounds.origin.x + inner->corner[GSK_CORNER_BOTTOM_LEFT].width,
|
||
|
|
inner->bounds.origin.y + inner->bounds.size.height - inner->corner[GSK_CORNER_BOTTOM_LEFT].height,
|
||
|
|
inner->corner[GSK_CORNER_BOTTOM_LEFT].width,
|
||
|
|
inner->corner[GSK_CORNER_BOTTOM_LEFT].height,
|
||
|
|
end_angle, middle_angle);
|
||
|
|
_cairo_ellipsis_negative (cr,
|
||
|
|
inner->bounds.origin.x + inner->bounds.size.width - inner->corner[GSK_CORNER_BOTTOM_RIGHT].width,
|
||
|
|
inner->bounds.origin.y + inner->bounds.size.height - inner->corner[GSK_CORNER_BOTTOM_RIGHT].height,
|
||
|
|
inner->corner[GSK_CORNER_BOTTOM_RIGHT].width,
|
||
|
|
inner->corner[GSK_CORNER_BOTTOM_RIGHT].height,
|
||
|
|
middle_angle, start_angle);
|
||
|
|
|
||
|
|
cairo_close_path (cr);
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
_gtk_rounded_box_path_left (const GskRoundedRect *outer,
|
||
|
|
const GskRoundedRect *inner,
|
||
|
|
cairo_t *cr)
|
||
|
|
{
|
||
|
|
double start_angle, middle_angle, end_angle;
|
||
|
|
|
||
|
|
if (outer->bounds.origin.x == inner->bounds.origin.x)
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (outer->bounds.origin.y + outer->bounds.size.height == inner->bounds.origin.y + inner->bounds.size.height)
|
||
|
|
start_angle = G_PI_2;
|
||
|
|
else
|
||
|
|
start_angle = 3 * G_PI_4;
|
||
|
|
middle_angle = G_PI;
|
||
|
|
if (outer->bounds.origin.y == inner->bounds.origin.y)
|
||
|
|
end_angle = 3 * G_PI_2;
|
||
|
|
else
|
||
|
|
end_angle = 5 * G_PI_4;
|
||
|
|
|
||
|
|
cairo_new_sub_path (cr);
|
||
|
|
|
||
|
|
_cairo_ellipsis (cr,
|
||
|
|
outer->bounds.origin.x + outer->corner[GSK_CORNER_BOTTOM_LEFT].width,
|
||
|
|
outer->bounds.origin.y + outer->bounds.size.height - outer->corner[GSK_CORNER_BOTTOM_LEFT].height,
|
||
|
|
outer->corner[GSK_CORNER_BOTTOM_LEFT].width,
|
||
|
|
outer->corner[GSK_CORNER_BOTTOM_LEFT].height,
|
||
|
|
start_angle, middle_angle);
|
||
|
|
_cairo_ellipsis (cr,
|
||
|
|
outer->bounds.origin.x + outer->corner[GSK_CORNER_TOP_LEFT].width,
|
||
|
|
outer->bounds.origin.y + outer->corner[GSK_CORNER_TOP_LEFT].height,
|
||
|
|
outer->corner[GSK_CORNER_TOP_LEFT].width,
|
||
|
|
outer->corner[GSK_CORNER_TOP_LEFT].height,
|
||
|
|
middle_angle, end_angle);
|
||
|
|
|
||
|
|
_cairo_ellipsis_negative (cr,
|
||
|
|
inner->bounds.origin.x + inner->corner[GSK_CORNER_TOP_LEFT].width,
|
||
|
|
inner->bounds.origin.y + inner->corner[GSK_CORNER_TOP_LEFT].height,
|
||
|
|
inner->corner[GSK_CORNER_TOP_LEFT].width,
|
||
|
|
inner->corner[GSK_CORNER_TOP_LEFT].height,
|
||
|
|
end_angle, middle_angle);
|
||
|
|
_cairo_ellipsis_negative (cr,
|
||
|
|
inner->bounds.origin.x + inner->corner[GSK_CORNER_BOTTOM_LEFT].width,
|
||
|
|
inner->bounds.origin.y + inner->bounds.size.height - inner->corner[GSK_CORNER_BOTTOM_LEFT].height,
|
||
|
|
inner->corner[GSK_CORNER_BOTTOM_LEFT].width,
|
||
|
|
inner->corner[GSK_CORNER_BOTTOM_LEFT].height,
|
||
|
|
middle_angle, start_angle);
|
||
|
|
|
||
|
|
cairo_close_path (cr);
|
||
|
|
}
|
||
|
|
|