/* GTK - The GIMP Toolkit * Copyright (C) 2011 Benjamin Otte * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library 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 * 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, see . */ #include "config.h" #include "gtkroundedboxprivate.h" #include "gtkcsscornervalueprivate.h" #include "gtkcssnumbervalueprivate.h" #include "gtkcsstypesprivate.h" #include "gtkprivate.h" #include typedef struct { double angle1; double angle2; gboolean negative; } Arc; static inline guint mem_hash (gconstpointer v, int len) { const signed char *p; const signed char *end; guint32 h = 5381; p = v; end = p + len; for (; p < end; p++) h = (h << 5) + h + *p; return h; } static guint arc_path_hash (Arc *arc) { return mem_hash ((gconstpointer)arc, sizeof (Arc)); } static gboolean arc_path_equal (Arc *arc1, Arc *arc2) { return arc1->angle1 == arc2->angle1 && arc1->angle2 == arc2->angle2 && arc1->negative == arc2->negative; } /* We need the path to start with a line-to */ static cairo_path_t * fixup_path (cairo_path_t *path) { cairo_path_data_t *data; data = &path->data[0]; if (data->header.type == CAIRO_PATH_MOVE_TO) data->header.type = CAIRO_PATH_LINE_TO; return path; } static void append_arc (cairo_t *cr, double angle1, double angle2, gboolean negative) { static GHashTable *arc_path_cache; Arc key; cairo_path_t *arc; memset (&key, 0, sizeof (Arc)); key.angle1 = angle1; key.angle2 = angle2; key.negative = negative; if (arc_path_cache == NULL) arc_path_cache = g_hash_table_new_full ((GHashFunc)arc_path_hash, (GEqualFunc)arc_path_equal, g_free, (GDestroyNotify)cairo_path_destroy); arc = g_hash_table_lookup (arc_path_cache, &key); if (arc == NULL) { cairo_surface_t *surface; cairo_t *tmp; surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 1, 1); tmp = cairo_create (surface); if (negative) cairo_arc_negative (tmp, 0.0, 0.0, 1.0, angle1, angle2); else cairo_arc (tmp, 0.0, 0.0, 1.0, angle1, angle2); arc = fixup_path (cairo_copy_path (tmp)); g_hash_table_insert (arc_path_cache, g_memdup2 (&key, sizeof (key)), arc); cairo_destroy (tmp); cairo_surface_destroy (surface); } cairo_append_path (cr, arc); } static void _cairo_ellipsis (cairo_t *cr, double xc, double yc, double xradius, double yradius, double angle1, double angle2) { cairo_matrix_t save; if (xradius <= 0.0 || yradius <= 0.0) { cairo_line_to (cr, xc, yc); return; } cairo_get_matrix (cr, &save); cairo_translate (cr, xc, yc); cairo_scale (cr, xradius, yradius); append_arc (cr, angle1, angle2, FALSE); cairo_set_matrix (cr, &save); } static void _cairo_ellipsis_negative (cairo_t *cr, double xc, double yc, double xradius, double yradius, double angle1, double angle2) { cairo_matrix_t save; if (xradius <= 0.0 || yradius <= 0.0) { cairo_line_to (cr, xc, yc); return; } cairo_get_matrix (cr, &save); cairo_translate (cr, xc, yc); cairo_scale (cr, xradius, yradius); append_arc (cr, angle1, angle2, TRUE); cairo_set_matrix (cr, &save); } double _gtk_rounded_box_guess_length (const GskRoundedRect *box, GtkCssSide side) { double length; GtkCssSide before, after; before = side; after = (side + 1) % 4; if (side & 1) length = box->bounds.size.height - box->corner[before].height - box->corner[after].height; else length = box->bounds.size.width - box->corner[before].width - box->corner[after].width; length += G_PI * 0.125 * (box->corner[before].width + box->corner[before].height + box->corner[after].width + box->corner[after].height); return length; } void _gtk_rounded_box_path_side (const GskRoundedRect *box, cairo_t *cr, GtkCssSide side) { switch (side) { case GTK_CSS_TOP: _cairo_ellipsis (cr, box->bounds.origin.x + box->corner[GSK_CORNER_TOP_LEFT].width, box->bounds.origin.y + box->corner[GSK_CORNER_TOP_LEFT].height, box->corner[GSK_CORNER_TOP_LEFT].width, box->corner[GSK_CORNER_TOP_LEFT].height, 5 * G_PI_4, 3 * G_PI_2); _cairo_ellipsis (cr, box->bounds.origin.x + box->bounds.size.width - box->corner[GSK_CORNER_TOP_RIGHT].width, box->bounds.origin.y + box->corner[GSK_CORNER_TOP_RIGHT].height, box->corner[GSK_CORNER_TOP_RIGHT].width, box->corner[GSK_CORNER_TOP_RIGHT].height, - G_PI_2, -G_PI_4); break; case GTK_CSS_RIGHT: _cairo_ellipsis (cr, box->bounds.origin.x + box->bounds.size.width - box->corner[GSK_CORNER_TOP_RIGHT].width, box->bounds.origin.y + box->corner[GSK_CORNER_TOP_RIGHT].height, box->corner[GSK_CORNER_TOP_RIGHT].width, box->corner[GSK_CORNER_TOP_RIGHT].height, - G_PI_4, 0); _cairo_ellipsis (cr, box->bounds.origin.x + box->bounds.size.width - box->corner[GSK_CORNER_BOTTOM_RIGHT].width, box->bounds.origin.y + box->bounds.size.height - box->corner[GSK_CORNER_BOTTOM_RIGHT].height, box->corner[GSK_CORNER_BOTTOM_RIGHT].width, box->corner[GSK_CORNER_BOTTOM_RIGHT].height, 0, G_PI_4); break; case GTK_CSS_BOTTOM: _cairo_ellipsis (cr, box->bounds.origin.x + box->bounds.size.width - box->corner[GSK_CORNER_BOTTOM_RIGHT].width, box->bounds.origin.y + box->bounds.size.height - box->corner[GSK_CORNER_BOTTOM_RIGHT].height, box->corner[GSK_CORNER_BOTTOM_RIGHT].width, box->corner[GSK_CORNER_BOTTOM_RIGHT].height, G_PI_4, G_PI_2); _cairo_ellipsis (cr, box->bounds.origin.x + box->corner[GSK_CORNER_BOTTOM_LEFT].width, box->bounds.origin.y + box->bounds.size.height - box->corner[GSK_CORNER_BOTTOM_LEFT].height, box->corner[GSK_CORNER_BOTTOM_LEFT].width, box->corner[GSK_CORNER_BOTTOM_LEFT].height, G_PI_2, 3 * G_PI_4); break; case GTK_CSS_LEFT: _cairo_ellipsis (cr, box->bounds.origin.x + box->corner[GSK_CORNER_BOTTOM_LEFT].width, box->bounds.origin.y + box->bounds.size.height - box->corner[GSK_CORNER_BOTTOM_LEFT].height, box->corner[GSK_CORNER_BOTTOM_LEFT].width, box->corner[GSK_CORNER_BOTTOM_LEFT].height, 3 * G_PI_4, G_PI); _cairo_ellipsis (cr, box->bounds.origin.x + box->corner[GSK_CORNER_TOP_LEFT].width, box->bounds.origin.y + box->corner[GSK_CORNER_TOP_LEFT].height, box->corner[GSK_CORNER_TOP_LEFT].width, box->corner[GSK_CORNER_TOP_LEFT].height, G_PI, 5 * G_PI_4); break; default: g_assert_not_reached (); break; } } void _gtk_rounded_box_path_top (const GskRoundedRect *outer, const GskRoundedRect *inner, cairo_t *cr) { double start_angle, middle_angle, end_angle; if (outer->bounds.origin.y == inner->bounds.origin.y) return; if (outer->bounds.origin.x == inner->bounds.origin.x) start_angle = G_PI; else start_angle = 5 * G_PI_4; middle_angle = 3 * G_PI_2; if (outer->bounds.origin.x + outer->bounds.size.width == inner->bounds.origin.x + inner->bounds.size.width) end_angle = 0; else end_angle = 7 * G_PI_4; cairo_new_sub_path (cr); _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, start_angle, middle_angle); _cairo_ellipsis (cr, outer->bounds.origin.x + outer->bounds.size.width - outer->corner[GSK_CORNER_TOP_RIGHT].width, outer->bounds.origin.y + outer->corner[GSK_CORNER_TOP_RIGHT].height, outer->corner[GSK_CORNER_TOP_RIGHT].width, outer->corner[GSK_CORNER_TOP_RIGHT].height, middle_angle, end_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, end_angle, middle_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, middle_angle, start_angle); cairo_close_path (cr); } void _gtk_rounded_box_path_right (const GskRoundedRect *outer, const GskRoundedRect *inner, cairo_t *cr) { double start_angle, middle_angle, end_angle; if (outer->bounds.origin.x + outer->bounds.size.width == inner->bounds.origin.x + inner->bounds.size.width) return; if (outer->bounds.origin.y == inner->bounds.origin.y) start_angle = 3 * G_PI_2; else start_angle = 7 * G_PI_4; middle_angle = 0; if (outer->bounds.origin.y + outer->bounds.size.height == inner->bounds.origin.y + inner->bounds.size.height) end_angle = G_PI_2; else end_angle = G_PI_4; cairo_new_sub_path (cr); _cairo_ellipsis (cr, outer->bounds.origin.x + outer->bounds.size.width - outer->corner[GSK_CORNER_TOP_RIGHT].width, outer->bounds.origin.y + outer->corner[GSK_CORNER_TOP_RIGHT].height, outer->corner[GSK_CORNER_TOP_RIGHT].width, outer->corner[GSK_CORNER_TOP_RIGHT].height, start_angle, middle_angle); _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, middle_angle, end_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, 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); }