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 (GtkSymbolicColor, gtk_symbolic_color,
26 gtk_symbolic_color_ref, gtk_symbolic_color_unref)
27 G_DEFINE_BOXED_TYPE (GtkGradient, gtk_gradient,
28 gtk_gradient_ref, gtk_gradient_unref)
38 struct GtkSymbolicColor
50 GtkSymbolicColor *color;
56 GtkSymbolicColor *color1;
57 GtkSymbolicColor *color2;
63 typedef struct ColorStop ColorStop;
68 GtkSymbolicColor *color;
84 gtk_symbolic_color_new_literal (GdkColor *color)
86 GtkSymbolicColor *symbolic_color;
88 g_return_val_if_fail (color != NULL, NULL);
90 symbolic_color = g_slice_new0 (GtkSymbolicColor);
91 symbolic_color->type = COLOR_TYPE_LITERAL;
92 symbolic_color->color = *color;
93 symbolic_color->ref_count = 1;
95 return symbolic_color;
99 gtk_symbolic_color_new_name (const gchar *name)
101 GtkSymbolicColor *symbolic_color;
103 g_return_val_if_fail (name != NULL, NULL);
105 symbolic_color = g_slice_new0 (GtkSymbolicColor);
106 symbolic_color->type = COLOR_TYPE_NAME;
107 symbolic_color->name = g_strdup (name);
108 symbolic_color->ref_count = 1;
110 return symbolic_color;
114 gtk_symbolic_color_new_shade (GtkSymbolicColor *color,
117 GtkSymbolicColor *symbolic_color;
119 g_return_val_if_fail (color != NULL, NULL);
121 symbolic_color = g_slice_new0 (GtkSymbolicColor);
122 symbolic_color->type = COLOR_TYPE_SHADE;
123 symbolic_color->shade.color = gtk_symbolic_color_ref (color);
124 symbolic_color->shade.factor = CLAMP (factor, 0, 1);
125 symbolic_color->ref_count = 1;
127 return symbolic_color;
131 gtk_symbolic_color_new_mix (GtkSymbolicColor *color1,
132 GtkSymbolicColor *color2,
135 GtkSymbolicColor *symbolic_color;
137 g_return_val_if_fail (color1 != NULL, NULL);
138 g_return_val_if_fail (color1 != NULL, NULL);
140 symbolic_color = g_slice_new0 (GtkSymbolicColor);
141 symbolic_color->type = COLOR_TYPE_MIX;
142 symbolic_color->mix.color1 = gtk_symbolic_color_ref (color1);
143 symbolic_color->mix.color2 = gtk_symbolic_color_ref (color2);
144 symbolic_color->mix.factor = CLAMP (factor, 0, 1);
145 symbolic_color->ref_count = 1;
147 return symbolic_color;
151 gtk_symbolic_color_ref (GtkSymbolicColor *color)
153 g_return_val_if_fail (color != NULL, NULL);
161 gtk_symbolic_color_unref (GtkSymbolicColor *color)
163 g_return_if_fail (color != NULL);
167 if (color->ref_count == 0)
171 case COLOR_TYPE_NAME:
172 g_free (color->name);
174 case COLOR_TYPE_SHADE:
175 gtk_symbolic_color_unref (color->shade.color);
178 gtk_symbolic_color_unref (color->mix.color1);
179 gtk_symbolic_color_unref (color->mix.color2);
185 g_slice_free (GtkSymbolicColor, color);
190 gtk_symbolic_color_resolve (GtkSymbolicColor *color,
191 GtkStyleSet *style_set,
192 GdkColor *resolved_color)
194 g_return_val_if_fail (color != NULL, FALSE);
195 g_return_val_if_fail (GTK_IS_STYLE_SET (style_set), FALSE);
196 g_return_val_if_fail (resolved_color != NULL, FALSE);
200 case COLOR_TYPE_LITERAL:
201 *resolved_color = color->color;
203 case COLOR_TYPE_NAME:
205 GtkSymbolicColor *named_color;
207 named_color = gtk_style_set_lookup_color (style_set, color->name);
212 return gtk_symbolic_color_resolve (named_color, style_set, resolved_color);
216 case COLOR_TYPE_SHADE:
220 if (!gtk_symbolic_color_resolve (color->shade.color, style_set, &shade))
223 resolved_color->red = CLAMP (shade.red * color->shade.factor, 0, 65535);
224 resolved_color->green = CLAMP (shade.green * color->shade.factor, 0, 65535);
225 resolved_color->blue = CLAMP (shade.blue * color->shade.factor, 0, 65535);
233 GdkColor color1, color2;
235 if (!gtk_symbolic_color_resolve (color->mix.color1, style_set, &color1))
238 if (!gtk_symbolic_color_resolve (color->mix.color2, style_set, &color2))
241 resolved_color->red = CLAMP (color1.red + ((color2.red - color1.red) * color->mix.factor), 0, 65535);
242 resolved_color->green = CLAMP (color1.green + ((color2.green - color1.green) * color->mix.factor), 0, 65535);
243 resolved_color->blue = CLAMP (color1.blue + ((color2.blue - color1.blue) * color->mix.factor), 0, 65535);
250 g_assert_not_reached ();
258 gtk_gradient_new_linear (gdouble x0,
263 GtkGradient *gradient;
265 gradient = g_slice_new (GtkGradient);
266 gradient->stops = g_array_new (FALSE, FALSE, sizeof (ColorStop));
273 gradient->ref_count = 1;
279 gtk_gradient_add_color_stop (GtkGradient *gradient,
281 GtkSymbolicColor *color)
285 g_return_if_fail (gradient != NULL);
287 stop.offset = offset;
288 stop.color = gtk_symbolic_color_ref (color);
290 g_array_append_val (gradient->stops, stop);
294 gtk_gradient_ref (GtkGradient *gradient)
296 g_return_val_if_fail (gradient != NULL, NULL);
298 gradient->ref_count++;
304 gtk_gradient_unref (GtkGradient *gradient)
306 g_return_if_fail (gradient != NULL);
308 gradient->ref_count--;
310 if (gradient->ref_count == 0)
314 for (i = 0; i < gradient->stops->len; i++)
318 stop = &g_array_index (gradient->stops, ColorStop, i);
319 gtk_symbolic_color_unref (stop->color);
322 g_array_free (gradient->stops, TRUE);
323 g_slice_free (GtkGradient, gradient);
328 gtk_gradient_resolve (GtkGradient *gradient,
329 GtkStyleSet *style_set,
330 cairo_pattern_t **resolved_gradient)
332 cairo_pattern_t *pattern;
335 g_return_val_if_fail (gradient != NULL, FALSE);
336 g_return_val_if_fail (GTK_IS_STYLE_SET (style_set), FALSE);
337 g_return_val_if_fail (resolved_gradient != NULL, FALSE);
339 pattern = cairo_pattern_create_linear (gradient->x0, gradient->y0,
340 gradient->x1, gradient->y1);
342 for (i = 0; i < gradient->stops->len; i++)
347 stop = &g_array_index (gradient->stops, ColorStop, i);
349 if (!gtk_symbolic_color_resolve (stop->color, style_set, &color))
351 cairo_pattern_destroy (pattern);
355 cairo_pattern_add_color_stop_rgb (pattern, stop->offset,
357 color.green / 65535.,
358 color.blue / 65535.);
361 *resolved_gradient = pattern;