1 /* GTK - The GIMP Toolkit
2 * Copyright (C) 2010 Carlos Garnacho <carlosg@gnome.org>
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 #include "gtksymboliccolor.h"
22 #include "gtkstyleset.h"
25 G_DEFINE_BOXED_TYPE (GtkGradient, gtk_gradient,
26 gtk_gradient_ref, gtk_gradient_unref)
36 struct GtkSymbolicColor
48 GtkSymbolicColor *color;
54 GtkSymbolicColor *color1;
55 GtkSymbolicColor *color2;
61 typedef struct ColorStop ColorStop;
66 GtkSymbolicColor *color;
82 gtk_symbolic_color_new_literal (GdkColor *color)
84 GtkSymbolicColor *symbolic_color;
86 g_return_val_if_fail (color != NULL, NULL);
88 symbolic_color = g_slice_new0 (GtkSymbolicColor);
89 symbolic_color->type = COLOR_TYPE_LITERAL;
90 symbolic_color->color = *color;
91 symbolic_color->ref_count = 1;
93 return symbolic_color;
97 gtk_symbolic_color_new_name (const gchar *name)
99 GtkSymbolicColor *symbolic_color;
101 g_return_val_if_fail (name != NULL, NULL);
103 symbolic_color = g_slice_new0 (GtkSymbolicColor);
104 symbolic_color->type = COLOR_TYPE_NAME;
105 symbolic_color->name = g_strdup (name);
106 symbolic_color->ref_count = 1;
108 return symbolic_color;
112 gtk_symbolic_color_new_shade (GtkSymbolicColor *color,
115 GtkSymbolicColor *symbolic_color;
117 g_return_val_if_fail (color != NULL, NULL);
119 symbolic_color = g_slice_new0 (GtkSymbolicColor);
120 symbolic_color->type = COLOR_TYPE_SHADE;
121 symbolic_color->shade.color = gtk_symbolic_color_ref (color);
122 symbolic_color->shade.factor = CLAMP (factor, 0, 1);
123 symbolic_color->ref_count = 1;
125 return symbolic_color;
129 gtk_symbolic_color_new_mix (GtkSymbolicColor *color1,
130 GtkSymbolicColor *color2,
133 GtkSymbolicColor *symbolic_color;
135 g_return_val_if_fail (color1 != NULL, NULL);
136 g_return_val_if_fail (color1 != NULL, NULL);
138 symbolic_color = g_slice_new0 (GtkSymbolicColor);
139 symbolic_color->type = COLOR_TYPE_MIX;
140 symbolic_color->mix.color1 = gtk_symbolic_color_ref (color1);
141 symbolic_color->mix.color2 = gtk_symbolic_color_ref (color2);
142 symbolic_color->mix.factor = CLAMP (factor, 0, 1);
143 symbolic_color->ref_count = 1;
145 return symbolic_color;
149 gtk_symbolic_color_ref (GtkSymbolicColor *color)
151 g_return_val_if_fail (color != NULL, NULL);
159 gtk_symbolic_color_unref (GtkSymbolicColor *color)
161 g_return_if_fail (color != NULL);
165 if (color->ref_count == 0)
169 case COLOR_TYPE_NAME:
170 g_free (color->name);
172 case COLOR_TYPE_SHADE:
173 gtk_symbolic_color_unref (color->shade.color);
176 gtk_symbolic_color_unref (color->mix.color1);
177 gtk_symbolic_color_unref (color->mix.color2);
183 g_slice_free (GtkSymbolicColor, color);
188 gtk_symbolic_color_resolve (GtkSymbolicColor *color,
189 GtkStyleSet *style_set,
190 GdkColor *resolved_color)
192 g_return_val_if_fail (color != NULL, FALSE);
193 g_return_val_if_fail (GTK_IS_STYLE_SET (style_set), FALSE);
194 g_return_val_if_fail (resolved_color != NULL, FALSE);
198 case COLOR_TYPE_LITERAL:
199 *resolved_color = color->color;
201 case COLOR_TYPE_NAME:
203 GtkSymbolicColor *named_color;
205 named_color = gtk_style_set_lookup_color (style_set, color->name);
210 return gtk_symbolic_color_resolve (named_color, style_set, resolved_color);
214 case COLOR_TYPE_SHADE:
218 if (!gtk_symbolic_color_resolve (color->shade.color, style_set, &shade))
221 resolved_color->red = CLAMP (shade.red * color->shade.factor, 0, 65535);
222 resolved_color->green = CLAMP (shade.green * color->shade.factor, 0, 65535);
223 resolved_color->blue = CLAMP (shade.blue * color->shade.factor, 0, 65535);
231 GdkColor color1, color2;
233 if (!gtk_symbolic_color_resolve (color->mix.color1, style_set, &color1))
236 if (!gtk_symbolic_color_resolve (color->mix.color2, style_set, &color2))
239 resolved_color->red = CLAMP (color1.red + ((color2.red - color1.red) * color->mix.factor), 0, 65535);
240 resolved_color->green = CLAMP (color1.green + ((color2.green - color1.green) * color->mix.factor), 0, 65535);
241 resolved_color->blue = CLAMP (color1.blue + ((color2.blue - color1.blue) * color->mix.factor), 0, 65535);
248 g_assert_not_reached ();
255 gtk_symbolic_color_get_type (void)
257 static GType type = 0;
259 if (G_UNLIKELY (!type))
260 type = g_boxed_type_register_static (I_("GtkSymbolicColor"),
261 (GBoxedCopyFunc) gtk_symbolic_color_ref,
262 (GBoxedFreeFunc) gtk_symbolic_color_unref);
269 gtk_gradient_new_linear (gdouble x0,
274 GtkGradient *gradient;
276 gradient = g_slice_new (GtkGradient);
277 gradient->stops = g_array_new (FALSE, FALSE, sizeof (ColorStop));
284 gradient->ref_count = 1;
290 gtk_gradient_add_color_stop (GtkGradient *gradient,
292 GtkSymbolicColor *color)
296 g_return_if_fail (gradient != NULL);
298 stop.offset = offset;
299 stop.color = gtk_symbolic_color_ref (color);
301 g_array_append_val (gradient->stops, stop);
305 gtk_gradient_ref (GtkGradient *gradient)
307 g_return_val_if_fail (gradient != NULL, NULL);
309 gradient->ref_count++;
315 gtk_gradient_unref (GtkGradient *gradient)
317 g_return_if_fail (gradient != NULL);
319 gradient->ref_count--;
321 if (gradient->ref_count == 0)
325 for (i = 0; i < gradient->stops->len; i++)
329 stop = &g_array_index (gradient->stops, ColorStop, i);
330 gtk_symbolic_color_unref (stop->color);
333 g_array_free (gradient->stops, TRUE);
334 g_slice_free (GtkGradient, gradient);
339 gtk_gradient_resolve (GtkGradient *gradient,
340 GtkStyleSet *style_set,
341 cairo_pattern_t **resolved_gradient)
343 cairo_pattern_t *pattern;
346 g_return_val_if_fail (gradient != NULL, FALSE);
347 g_return_val_if_fail (GTK_IS_STYLE_SET (style_set), FALSE);
348 g_return_val_if_fail (resolved_gradient != NULL, FALSE);
350 pattern = cairo_pattern_create_linear (gradient->x0, gradient->y0,
351 gradient->x1, gradient->y1);
353 for (i = 0; i < gradient->stops->len; i++)
358 stop = &g_array_index (gradient->stops, ColorStop, i);
360 if (!gtk_symbolic_color_resolve (stop->color, style_set, &color))
362 cairo_pattern_destroy (pattern);
366 cairo_pattern_add_color_stop_rgb (pattern, stop->offset,
368 color.green / 65535.,
369 color.blue / 65535.);
372 *resolved_gradient = pattern;